JPH11319979A - Strip miss error detection-protection device of die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent oil leakage from occurring at a contact part between a striker and a punch head by mounting resineous members thereon. SOLUTION: The device is comprised of an upper mounting member Zu, in which an upper truncated conical member 2 is mounted in erecting/expanding downward and up/down slidably to a striker 1 through an upper spring member 4 in a cavity similar to an upper cylindrical body 3, and a lower mounting member Z1, in which a lower truncated conical member 6 is mounted in reversely erecting/expanding upward and up/down slidably to a punch head 5 through a lower spring member 6 in a cavity similar to a lower cylindrical body 7. When the striker 1 is descended to be abutted on a punch head upper face 5a, an upper truncated cylindrical member 2 skirt outer peripheral face is abutted on a skirt inner peripheral face of the lower truncated cylindrical member 6 by the energizing force of each spring members constituting the upper/lower mounting members to be integrally fitted and brought both into tight contact, oil leakage to outside is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing erroneous detection of a strip error in a die of a plate processing machine such as a turret punch press.

[0002]

2. Description of the Related Art In a plate material processing machine such as a turret punch press, a striker and a punch die are provided with communication holes for air and lubricating oil useful for punching, and as shown in FIG. The oil mist supply tube from the oil supply source is connected to the side of the ram striker via the control valve, and this ram striker is formed by bending the oil mist supply hole from the side to the bottom, and the punch of the punch die The head has an oil mist supply hole from the punch head to the side of the punch body so that the oil mist supply hole communicates when the ram striker descends and comes into contact with the upper surface of the punch head. A supply hole is formed so that oil mist is also supplied around the punch blade passage hole of the stripper located at the lower end of the punch guide.

[0003] The punch guide is also provided with a communication hole to the inner periphery of the upper turret hole so that the oil mist on the side of the punch body communicates with the supply hole.

As a result, the ram striker descends,
When it comes into contact with the punch head, oil mist from the air / oil source is supplied through the tube, the supply hole in the ram striker, the supply hole from the punch head to the punch body side, and the communication hole. The circumference is lubricated. In addition, as described above, the oil mist spreads evenly around the punch passage hole of the punch blade and the stripper. I have.

[0005] That is, from the air and oil supply source having a control valve which operates in response to a signal from a stroke position detector provided on the side of the ram striker, the supply hole,
Generally, oil mist is uniformly supplied from an upper striker to a predetermined portion such as a lower mold punch through a communication hole, and is lubricated.

[0006]

However, in the above-mentioned conventional example, the oil mist is repeated as the striker descends, strikes the punch head against the striker, and rises the striker. Are the contact surfaces (reference numerals 1a and 5a in FIG. 3).
And gradually forms an oil film.

As shown in JP-B-57-39850, when the punching operation is completed and the punch returns from the bottom dead center and returns, the striker and the punch head are moved within a certain stroke from the bottom dead center. If the contact state is indicated, it is normal, and a detector for electrically detecting whether or not the striker and the punch head are in contact with each other is provided. After the punching operation is completed, the punch rises, and At a point in time when the work must have already been removed beyond a certain stroke, a state where the work does not bite into the punch and remains separated is detected as abnormal, but as described above, between the striker and the punch head. When an oil film or the like is formed, both are electrically insulated, and the work is still within the stroke within the range that cannot be removed from the punch. , Detecting workpiece erroneous as has reached the range must be removed might 恰,
That is, there is a problem that erroneous detection of a strip error occurs.

The present invention has been made by paying attention to the above-mentioned point, and a resin strip is mounted on a striker and a punch head, and an erroneous detection of a strip error of a mold which does not cause oil leakage at a contact portion between the striker and the punch head. It is an object to provide a prevention device.

[0009]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) In a plate material processing machine such as a turret punch press, an upper frusto-conical member is provided in a striker striking from above during processing, and a cavity similar to the frusto-conical member is provided inside an upper cylindrical body. An upper mounting member is formed by interposing a spring member that urges downward against an upward pressing force, and is erected in the cavity and slid upward and downward as a divergent downward and upward. A lower truncated cone-shaped member is provided in a punch head of a mold punch that is located and receives the strike of the striker, and a cavity similar to the lower truncated cone-shaped member is provided in a lower cylindrical body, and a downward pressing force is applied. Interpose a spring member that urges upward against
The lower mounting member is configured by being slid vertically up and down as it expands inward in the cavity and expands upward, and the upper mounting member is combined with a small diameter and the lower mounting member is combined with a large diameter. When the upper and lower mounting members are in contact with the upper surface of the punch head, the outer peripheral surface of the flared skirt expands below the upper truncated conical member on the striker side due to the biasing force of each of the spring members constituting the upper and lower mounting members. Above the lower frustoconical member on the punch head side, it abuts against the inner peripheral surface of the flared skirt and fits up and down so that it fits tightly to prevent oil leakage to the outside. A device for preventing erroneous detection of a strip error of a mold.

(2) The upper and lower truncated cone-shaped members have oil mist communication holes along the axis near the center and a plurality of slit-shaped notches along the truncated cone-shaped ridge. (1) The device for preventing erroneous detection of strip mistakes in a mold according to the above (1), wherein the device is configured to be easily contracted toward the center in the diameter direction.

(3) The apparatus for preventing erroneous detection of strip mistakes in a mold according to the above (1), wherein the upper and lower truncated conical members are formed of a soft tendency material.

(4) The apparatus for preventing erroneous detection of strip mistakes in a mold according to the above (1), wherein the upper and lower columnar bodies are formed of a hard prone material.

(5) The apparatus for preventing erroneous detection of strip mistakes in a mold according to the above (3), wherein the soft tendency material is a urethane-based resin.

(6) The apparatus for preventing erroneous detection of strip mistakes in a mold according to the above (4), wherein the hard tendency material is a nylon-based resin.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 (a) is a longitudinal sectional side view showing a main part of an embodiment of a device for preventing erroneous detection of strip mistakes in a mold according to the present invention, and FIG. 1 (b) is a plan view of a truncated conical member. ,
FIG. 2C is a perspective view showing an example of a combination of truncated conical members, FIG. 2 is a schematic vertical sectional side view showing the entire configuration of a punch portion, FIG. 3 is a vertical sectional side view showing a conventional state, and FIG. It is a vertical side view which shows the general structure of a part.

Referring to the drawings, 1 is a striker, 2 is an upper truncated conical member, 3 is an upper columnar body,
Reference numeral 4 denotes an upper spring member, in which an upper truncated cone-shaped member 2 formed of a soft tendency material is attached to a striker 1 and an upper truncated cone-shaped member formed in an upper columnar body 3 formed of a hard tendency material. A cavity similar to the member 2 is provided, and an upper spring member 4 that urges downward against an upward pressing force is interposed. An upper mounting member Zu is formed by protruding downward from the lower surface of the striker to form an upper mounting member Zu. The frusto-conical member 6 is provided with a cavity similar to the lower frusto-conical member 6 inside a lower cylindrical body 7 formed of a hard prone material, and is urged upward against a downward pressing force. With the lower spring member 8 The lower mounting member Zl is formed by mounting the lower mounting member Zl with the upper mounting member Zl having a small diameter so that the upper mounting member Zu can be slid up and down as it inverts into the cavity and expands upward and diverge upward, and protrudes upward from the upper surface of the punch head. The upper and lower frusto-conical members 2 and 6 (both striker side and punch head side) are provided with a communication hole for oil mist along the axis near the center and along the axis. A plurality of slit-shaped notches 2a and 6a are provided along the frusto-conical ridge line so as to be easily contracted toward the center in the diametrical direction. During processing, the striker 1 descends and contacts the punch head upper surface 5a. When contacted, the outer peripheral surface of the flared skirt below the upper frusto-conical member 2 on the striker 1 side has the flared flared upper surface above the lower frusto-conical member 6 on the punch head 5 side. The peripheral surface abuts fitted to coalesce vertically exhibits a close contact, it has become capable of preventing construction leakage oil to the outside.

The soft material forming the upper and lower frustoconical members 2 and 6 is a urethane resin,
The hard prone material forming the upper and lower columnar bodies 3 and 7 is a nylon-based resin.

The operation will be described based on the above configuration.

In the step where the striker punches the die and punches the work, first, when the striker 1 descends and strikes the punch head 5, the lifter spring 10 (FIG. 2 or FIG. 4) mounted on the upper turret is used. (See FIG. 2) contracts in the vertical direction, and the stripper of the mold (see FIG. 2) presses the workpiece. When the frusto-conical member 2 and the lower truncated conical member 6 on the punch head side come into contact with the outer peripheral surface of the former lower divergent skirt and the inner peripheral surface of the latter upper divergent hem, the upper part of the upper mounting member Zu The spring member 4 and the lower spring member 8 of the lower mounting member Zl contract by the upper and lower pressing forces, and at the same time, the upper and lower truncated conical members 2 and 6. , 2a and 6-out slit-shaped cut
a reduces the distance between the upper and lower cylindrical bodies 3 and 7
The upper and lower spring members 4 and 8 are attached when the striker lower surface 1a and the punch head 5a surely come into contact with each other by vertically moving and shrinking along the inner taper (truncated cone-shaped inclined surface). Due to the force, the outer peripheral surface of the flared flank below the upper frustoconical member 2 on the striker 1 side contacts the inner peripheral surface of the flared flared upper part of the lower frustoconical member 6 on the punch head 5 side. It fits strongly so as to be united up and down and exhibits a close contact state, so that oil leakage to the outside can be prevented. In the above-described state, the die stripper (see FIG. 2) presses the work, and then the die stripping spring 9 contracts, and the work is punched out after the work is securely held. At the same time, oil mist is ejected from the lower surface of the punch blade and around the punch blade passage hole of the stripper, and the scrap is forcibly dropped. Then, with the action of the ram, first, the stripping spring is extended and restored, the work is pressed by the stripper, and the punch is pulled out of the work while remaining stationary, and then the lifter spring (see FIGS. 2 and 4). Sign 1
0) is extended and returned, and the stripper is returned to the upper turret together with the punch blade along with it, and a series of operations is completed (see FIG. 2).

As described above, by providing the upper and lower mounting members Zu and Zl according to the present invention, a wedge shape is formed between a so-called striker punch and a die punch to form a slit-shaped notch. Each of the frusto-conical members is mounted via a spring member, and is fitted and assembled from the top and bottom prior to processing to serve as a seal to prevent oil mist from leaking, and oil adheres to the upper surface of the mold. Can be prevented.

In the above description, the upper truncated cone-shaped member 2 of the upper mounting member Zu has been described as having a small diameter and the lower truncated cone-shaped member 6 of the lower mounting member Zl has been described as having a large diameter. This is a relative problem, and conversely, the upper truncated conical member 2 may have a larger diameter and the lower truncated conical member 6 may have a smaller diameter.

[0024]

According to the present invention, the resin member is mounted on the striker and the punch head, so that there is no oil leakage at the contact portion between the striker and the punch head.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional side view of a main part showing an embodiment of a device for preventing erroneous detection of a strip error of a mold according to the present invention, FIG. 1B is a plan view of a truncated conical member, and FIG. ) A perspective view showing an example of a combination of truncated conical members.

FIG. 2 is a schematic vertical cross-sectional view showing an entire configuration of a punch portion.

FIG. 3 is a longitudinal side view showing a conventional situation.

FIG. 4 is a longitudinal sectional side view showing a general configuration of a punch portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Striker 1a Striker lower surface 2 Upper truncated conical shape 2a Slit-shaped notch 3 Upper cylindrical body 4 Upper spring member 5 Punch head 5a Punch head upper surface 6 Lower truncated conical shape 7 Lower cylindrical shape body 8 Lower spring member 9 Stripping Spring 10 Lifter spring Zu Upper mounting member Zl Lower mounting member

Claims (6)

[Claims] In a plate processing machine such as a turret punch press, an upper frusto-conical member is provided in a striker striking from above during processing, and a cavity similar to the frusto-conical member is provided inside an upper cylindrical body. An upper mounting member is configured by interposing a spring member that urges downward against an upward pressing force and is erected in the cavity so as to be slid upward and downward as a divergent downward and upward. A lower truncated cone-shaped member is provided in the punch head of the die punch which receives the strike of the striker, and a cavity similar to the lower truncated cone-shaped member is provided inside the lower cylindrical body to resist downward pressing force. Then, a lower mounting member is formed by interposing a spring member that urges upward, and is slid up and down so as to be inverted and upwardly divergent in the cavity to form a lower mounting member. Combined as a large diameter, when the striker descends and abuts on the punch head upper surface during processing, the upper truncation on the striker side is performed by the urging force of the spring members constituting the upper mounting member and the lower mounting member. The outer peripheral surface of the flared skirt below the conical member abuts on the inner peripheral surface of the flared flank above the lower truncated conical member on the punch head side so that the outer peripheral surface is fitted up and down to form a close contact state. A device for preventing erroneous detection of strip mistakes in a mold, wherein the device is capable of preventing oil leakage to the outside. 2. The upper and lower frusto-conical members have a communication hole for oil mist in the vicinity of the center along the axis, and have a plurality of slit-shaped notches along the frusto-conical ridge line. 2. The apparatus for preventing erroneous detection of a strip error of a mold according to claim 1, wherein the apparatus is provided with a shape which is easily shrunk toward the center in the diameter direction. 3. The apparatus according to claim 1, wherein the upper and lower frustoconical members are formed of a soft material. 4. The apparatus according to claim 1, wherein the upper and lower cylindrical bodies are formed of a material having a tendency to be hard. 5. The apparatus according to claim 3, wherein the soft tendency material is a urethane-based resin. 6. The apparatus according to claim 4, wherein the hard tendency material is a nylon-based resin.