CN113942063B - Diaphragm punching method - Google Patents

Diaphragm punching method Download PDF

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Publication number
CN113942063B
CN113942063B CN202111251541.8A CN202111251541A CN113942063B CN 113942063 B CN113942063 B CN 113942063B CN 202111251541 A CN202111251541 A CN 202111251541A CN 113942063 B CN113942063 B CN 113942063B
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China
Prior art keywords
punch
oil bag
punching
oil
product
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CN202111251541.8A
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Chinese (zh)
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CN113942063A (en
Inventor
孙烈冰
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Technimark Precision Casting Suzhou Co ltd
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Technimark Precision Casting Suzhou Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0073—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor of non-flat surfaces, e.g. curved, profiled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The invention discloses a membrane punching method, which is characterized in that a membrane is punched and pressed into an outer convex surface of a hemispherical thin-walled product, a compressible oil bag is adopted to support the thin-walled product with the outer convex surface facing upwards in the punching process, and a pressure release valve is arranged on the compressible oil bag, so that the pressure release valve releases pressure to the compressible oil bag in the punching process, and the pressure of a punching sheet is kept basically constant. The invention can press the membrane into the outer convex surface of the hemispherical thin-wall product after punching, can prevent the thin-wall product from being crushed and can ensure that the punching sheet is stably and reliably pressed into the outer convex surface of the thin-wall product.

Description

Diaphragm punching method
Technical Field
The invention relates to a membrane punching method.
Background
Some products require assembly of the film, the film is punched and pressed into the product, and a film punching device is generally adopted to press the film into the product after punching.
The film die cutting apparatus generally comprises: the device comprises a horizontally-arranged template for flatly laying a diaphragm, a punch arranged above the template and a die arranged below the template; a through hole for punching is formed in the template, and the punch vertically penetrates through the through hole; the mould is provided with a groove for placing a product. When the membrane punching device is used, a product is placed into a groove of a die, then the membrane is tiled on the top surface of the die plate, the membrane covers the through hole for punching, the punch head moves downwards to be matched with the through hole for punching of the die plate, the membrane is punched, the punched piece continues to move downwards along with the punch head, and the punch head presses the punched piece into the product.
However, some products are semi-spherical thin-wall products, the surfaces of both sides of the products are respectively an outer convex surface and an inner concave surface, if a membrane is assembled on the outer convex surface, the outer convex surface is required to be placed in a groove of a mold, at the moment, the thin-wall product is only contacted with the bottom surface of the groove of the mold through the edge of the inner concave surface, and a punching sheet is pressed into the outer convex surface by a punching head, so that the thin-wall product is easily crushed, for example, the thin-wall product is fractured or deformed and sunk under the pressure.
Disclosure of Invention
The invention aims to provide a membrane punching method, which can press a membrane into an outer convex surface of a hemispherical thin-wall product after punching, can prevent the thin-wall product from being crushed and can ensure that a punching sheet is stably and reliably pressed into the outer convex surface of the thin-wall product.
In order to achieve the purpose, the technical scheme of the invention is to design a membrane punching method, a membrane is punched and pressed into an outer convex surface of a hemispherical thin-wall product, in the punching process, a compressible oil bag is adopted to support the thin-wall product with the outer convex surface facing upwards, and a pressure release valve is arranged on the compressible oil bag, so that the pressure release valve releases pressure to the compressible oil bag in the punching process, and the pressure of a punching sheet is kept basically constant.
Preferably, a membrane punching device is adopted for punching the membrane; the film blanking device comprises: the device comprises a horizontally-arranged template, a die arranged below the template, a vertically-arranged first punch and a vertically-arranged second punch which are arranged above the template, a first driving cylinder for driving the first punch to vertically lift, and a second driving cylinder for driving the second punch to vertically lift;
the template is provided with: the device comprises a vertically-arranged first punching through hole for a first punch to vertically penetrate through and match with the first punch to punch a membrane, and a vertically-arranged second punching through hole for a second punch to vertically penetrate through and match with the second punch to punch the membrane;
the die is provided with: a first groove located right below the first through hole for punching, and a second groove located right below the second through hole for punching; a vertical first oil bag is arranged in the first groove, and a vertical second oil bag is arranged in the second groove; the first oil bag and the second oil bag respectively comprise: the device comprises a vertical cylindrical main body part and a hemispherical upper convex part extending upwards from the top end of the main body part; the first oil bag and the second oil bag are filled with hydraulic oil; the main body part of the first oil bag and the first punch are coaxial; the main body part of the second oil bag is coaxial with the second punch;
the end faces of the bottom ends of the first punch and the second punch are respectively upwards sunken to form concave parts, and inner cavities of the concave parts of the first punch and the second punch are hemispherical; the inner concave part of the first punch is correspondingly matched with the upper convex part of the first oil bag; the inner concave part of the second punch is correspondingly matched with the upper convex part of the second oil bag; the upper convex parts of the first oil bag and the second oil bag are higher than the other upper convex part;
the bottom surface of the main body part of the first oil bag is fixedly connected with the bottom surface of the first groove; the bottom end of the main body part of the first oil bag is communicated with the bottom end of the main body part of the second oil bag through a first pipeline, a first pressure relief valve and a first one-way valve are arranged on the first pipeline, the first pressure relief valve is close to the joint of the first pipeline and the first oil bag, and the first one-way valve is close to the joint of the first pipeline and the second oil bag; the first pressure release valve is opened when the pressure in the first oil bag reaches a preset pressure; the first check valve only allows hydraulic oil to flow from the first oil bag to the second oil bag through the first pipeline;
the bottom surface of the main body part of the second oil bag is fixedly connected with the bottom surface of the second groove; the bottom end of the main body part of the second oil bag is also communicated with the bottom end of the main body part of the first oil bag through a second pipeline, a second pressure relief valve and a second one-way valve are arranged on the second pipeline, the second pressure relief valve is close to the joint of the second pipeline and the second oil bag, and the second one-way valve is close to the joint of the second pipeline and the first oil bag; the second pressure release valve is opened when the pressure in the second oil bag reaches a preset pressure; the second check valve allows only hydraulic oil to flow from the second oil bag to the first oil bag through the second line.
Preferably, the film punching method comprises the following steps:
1) Respectively placing two thin-wall products A and B which are hemispherical in shape in a first groove and a second groove of a die; the two side surfaces of the hemispherical thin-wall product are respectively an outer convex surface and an inner concave surface; the outer convex surface of the product A faces upwards, and the inner concave surface of the product A is attached to the upper convex part of the first oil pocket; the outer convex surface of the product B faces upwards, and the inner concave surface of the product B is attached to the upper convex part of the second oil pocket; at the moment, the upper convex part of the first oil bag is higher than the upper convex part of the second oil bag, and the product A is higher than the product B;
2) Moving the template downwards to make the template abut against the mold;
3) Flatly laying a membrane to be punched on the top surface of the template, so that the membrane covers the first punching through hole and the second punching through hole;
4) The first driving cylinder drives the first punch to move downwards, and the punch moves downwards to be matched with the first punching through hole of the template so as to punch the membrane; the first punched sheet continues to descend along with the first punch, and the first punch presses the first punched sheet on the outer convex surface of the product A; the first punch continues to move downwards, the first oil bag is pressed downwards, the pressure of hydraulic oil in the first oil bag reaches a preset pressure, the first pressure release valve is opened when the pressure in the first oil bag reaches the preset pressure, and hydraulic oil in the first oil bag flows to the second oil bag through the first pipeline; the first punch continues to descend until the upper convex part of the second oil bag is higher than the upper convex part of the first oil bag; at the moment, the first punch finishes pressing the first punching sheet into the outer convex surface of the product A; then the first driving cylinder drives the first punch to move upwards and reset;
5) The second driving cylinder drives the second punch to move downwards, and the punch moves downwards to be matched with the second punching through hole of the template so as to punch the diaphragm; the punched second punching sheet continues to descend along with a second punch, and the second punch presses the second punching sheet on the outer convex surface of the product B; the second punch continues to move downwards, the second oil bag is pressed downwards, the pressure of hydraulic oil in the second oil bag reaches a preset pressure, the second pressure release valve is opened when the pressure in the second oil bag reaches the preset pressure, and the hydraulic oil in the second oil bag flows to the first oil bag through the second pipeline; the second punch continues to descend until the upper convex part of the first oil bag is higher than the upper convex part of the second oil bag; at the moment, the second punch finishes pressing the second punching sheet into the outer convex surface of the product B; then the second driving cylinder drives the second punch to move upwards and reset;
6) Moving the template upwards to separate the template from the mold;
7) Taking out the product A and the product B in the mold;
8) Repeating steps 1) to 7).
Preferably, the inner cavities of the first groove and the second groove are both vertically arranged cylindrical;
a first guide ring is sleeved at the top end of the main body part of the first oil bag, and the outer ring of the first guide ring is in sliding fit with the inner peripheral wall of the first groove;
and the top end of the main body part of the second oil bag is sleeved with a second guide ring, and the outer ring of the second guide ring is in sliding fit with the inner peripheral wall of the second groove.
Preferably, heating rods are respectively arranged inside the first punch and the second punch.
The invention has the advantages and beneficial effects that: a method for punching a film is provided, which can press a film into an outer convex surface of a hemispherical thin-walled product after punching, prevent the thin-walled product from being crushed, and stably and reliably press a punching sheet into the outer convex surface of the thin-walled product.
In the process that the first punch presses the first punching sheet into the product A, the inner concave surface of the product A is always attached to the upper convex part of the first oil pocket, so that the semi-spherical thin-walled product A can be prevented from being crushed; and the first pressure relief valve is opened when the pressure in the first oil bag reaches a preset pressure, so that the pressure in the first oil bag can be kept at the preset pressure, and the pressure of the first punching sheet is kept basically constant, so that the first punching sheet is stably and reliably pressed into the outer convex surface of the thin-wall product A. In a similar way, in the process that the second punch presses the second punching sheet into the product B, the inner concave surface of the product B is always attached to the upper convex part of the second oil pocket, so that the semi-spherical thin-wall product B can be prevented from being crushed; and the second pressure relief valve is opened when the pressure in the second oil bag reaches a preset pressure, so that the pressure in the second oil bag can be kept at the preset pressure, and the pressure of the second punching sheet is kept basically constant, so that the second punching sheet is stably and reliably pressed into the outer convex surface of the thin-wall product B.
The first oil bag and the second oil bag alternately fill the opposite sides with hydraulic oil, so that an additional mechanism for supplementing the first oil bag with the hydraulic oil can be omitted, and an additional mechanism for supplementing the second oil bag with the hydraulic oil can be omitted.
The top end of the main body part of the first oil bag is sleeved with a first guide ring, the outer ring of the first guide ring is in sliding fit with the inner peripheral wall of the first groove, the first guide ring can guide the upper convex part of the first oil bag to vertically lift, the upper convex part of the first oil bag and a product A on the upper convex part are prevented from deviating, and therefore the first punching sheet can be further guaranteed to be stably and reliably pressed into the outer convex surface of the thin-wall product A. Similarly, the second guide ring is sleeved at the top end of the main body part of the second oil bag, the outer ring of the second guide ring is in sliding fit with the inner peripheral wall of the second groove, the second guide ring can guide the upper convex part of the second oil bag to vertically lift, the upper convex part of the second oil bag and a product B on the upper convex part are prevented from deviating, and the outer convex surface of the thin-wall product B which is stably and reliably pressed into the second punching sheet can be further ensured.
The heating rods are arranged inside the first punch and the second punch respectively, so that the punching sheet and the thin-wall product can be heated, and the punching sheet can be pressed into the thin-wall product more conveniently.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention provides a membrane punching method, which adopts a membrane punching device to punch membranes;
the film blanking device comprises: the device comprises a horizontally-arranged template, a die arranged below the template, a vertically-arranged first punch and a vertically-arranged second punch which are arranged above the template, a first driving cylinder for driving the first punch to vertically lift, and a second driving cylinder for driving the second punch to vertically lift;
the template is provided with: the device comprises a vertically-arranged first punching through hole for a first punch to vertically penetrate through and match with the first punch to punch a membrane, and a vertically-arranged second punching through hole for a second punch to vertically penetrate through and match with the second punch to punch the membrane; the first punching through hole and the first punch share the axis; the second punching through hole and the second punch share the axis; the first punching through hole and the second punching through hole are symmetrically arranged;
the die is provided with: a first groove located right below the first through hole for punching, and a second groove located right below the second through hole for punching; a first oil bag is vertically arranged in the first groove, and a second oil bag is vertically arranged in the second groove; the first oil bag and the second oil bag are both compressible oil bags; the first oil bag and the second oil bag respectively comprise: the device comprises a vertical cylindrical main body part and a hemispherical upper convex part extending upwards from the top end of the main body part; the first oil bag and the second oil bag are filled with hydraulic oil; the main body part of the first oil bag and the first punch are coaxial; the main body part of the second oil bag and the second punch share the axle center; the upper convex parts of the first oil bag and the second oil bag are positioned and do not protrude out of the top surface of the mould; the outer diameters of the first punch and the first through hole for punching are smaller than the outer diameter of the main body part of the first oil bag; the outer diameters of the second punch and the second punching through hole are smaller than the outer diameter of the main body part of the second oil bag;
the first punch and the second punch are symmetrically arranged; heating rods are respectively arranged in the first punch and the second punch; the end surfaces of the bottom ends of the first punch and the second punch are respectively sunken upwards to form concave parts, and inner cavities of the concave parts of the first punch and the second punch are hemispherical; the inner concave part of the first punch is correspondingly matched with the upper convex part of the first oil bag; the inner concave part of the second punch is correspondingly matched with the upper convex part of the second oil bag; the upper convex parts of the first oil bag and the second oil bag are higher than one other upper convex part;
the bottom surface of the main body part of the first oil bag is fixedly connected with the bottom surface of the first groove; the bottom end of the main body part of the first oil bag is communicated with the bottom end of the main body part of the second oil bag through a first pipeline, hydraulic oil is also filled in the first pipeline, a first pressure relief valve and a first one-way valve are arranged on the first pipeline, the first pressure relief valve is close to the joint of the first pipeline and the first oil bag, and the first one-way valve is close to the joint of the first pipeline and the second oil bag; the first pressure release valve is opened when the pressure in the first oil bag reaches a preset pressure; the first check valve only allows hydraulic oil to flow from the first oil bag to the second oil bag through the first pipeline;
the bottom surface of the main body part of the second oil bag is fixedly connected with the bottom surface of the second groove; the bottom end of the main body part of the second oil bag is also communicated with the bottom end of the main body part of the first oil bag through a second pipeline, hydraulic oil is also filled in the second pipeline, a second pressure relief valve and a second one-way valve are arranged on the second pipeline, the second pressure relief valve is close to the joint of the second pipeline and the second oil bag, and the second one-way valve is close to the joint of the second pipeline and the first oil bag; the second pressure release valve is opened when the pressure in the second oil bag reaches a preset pressure; the second check valve only allows hydraulic oil to flow from the second oil bag to the first oil bag through the second pipeline;
the inner cavities of the first groove and the second groove are both vertically arranged cylindrical; the first groove and the first punch share the axis; the second groove and the second punch share the axis; the first groove and the second groove are symmetrically arranged; a first guide ring is sleeved at the top end of the main body part of the first oil bag, the inner ring of the first guide ring is fixedly connected with the top end of the main body part of the first oil bag, and the outer ring of the first guide ring is in sliding fit with the inner peripheral wall of the first groove; a second guide ring is sleeved at the top end of the main body part of the second oil bag, the inner ring of the second guide ring is fixedly connected with the top end of the main body part of the second oil bag, and the outer ring of the second guide ring is in sliding fit with the inner peripheral wall of the second groove;
the membrane punching method comprises the following steps:
1) Respectively placing two thin-wall products A and B which are semi-spherical in shape in a first groove and a second groove of a die; the two side surfaces of the hemispherical thin-wall product are respectively an outer convex surface and an inner concave surface; the outer convex surface of the product A faces upwards, and the inner concave surface of the product A is attached to the upper convex part of the first oil pocket; the outer convex surface of the product B faces upwards, and the inner concave surface of the product B is attached to the upper convex part of the second oil pocket; at the moment, the upper convex part of the first oil bag is higher than the upper convex part of the second oil bag, and the product A is higher than the product B;
2) Moving the template downwards to make the template abut against the mold;
3) Flatly laying a membrane to be punched on the top surface of the template, so that the membrane covers the first punching through hole and the second punching through hole;
4) The first driving cylinder drives the first punch to move downwards, and the punch moves downwards to be matched with the first punching through hole of the template so as to punch the membrane; the first punched sheet continues to descend along with the first punch, and the first punch presses the first punched sheet on the outer convex surface of the product A; the first punch continues to move downwards, the first oil bag is pressed downwards, the pressure of hydraulic oil in the first oil bag reaches a preset pressure, the first pressure release valve is opened when the pressure in the first oil bag reaches the preset pressure, and hydraulic oil in the first oil bag flows to the second oil bag through the first pipeline; the first punch continues to descend until the upper convex part of the second oil bag is higher than the upper convex part of the first oil bag; at the moment, the first punch finishes pressing the first punching sheet into the outer convex surface of the product A; then the first driving cylinder drives the first punch to move upwards and reset;
5) The second driving cylinder drives the second punch to move downwards, and the punch moves downwards to be matched with the second punching through hole of the template so as to punch the diaphragm; the punched second punching sheet continues to descend along with a second punch, and the second punch presses the second punching sheet on the outer convex surface of the product B; the second punch continues to move downwards, the second oil bag is pressed downwards, the pressure of hydraulic oil in the second oil bag reaches a preset pressure, the second pressure release valve is opened when the pressure in the second oil bag reaches the preset pressure, and the hydraulic oil in the second oil bag flows to the first oil bag through the second pipeline; the second punch continues to descend until the upper convex part of the first oil bag is higher than the upper convex part of the second oil bag; at the moment, the second punch finishes pressing the second punching sheet into the outer convex surface of the product B; then the second driving cylinder drives the second punch to move upwards and reset;
6) Moving the template upwards to separate the template from the mold;
7) Taking out the product A and the product B in the mold;
8) Repeating steps 1) to 7).
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (3)

1. A membrane punching method is characterized in that a membrane punching device is adopted for punching a membrane;
the film blanking device comprises: the device comprises a horizontally-arranged template, a die arranged below the template, a vertically-arranged first punch and a vertically-arranged second punch which are arranged above the template, a first driving cylinder for driving the first punch to vertically lift, and a second driving cylinder for driving the second punch to vertically lift;
the template is provided with: the device comprises a vertically-arranged first punching through hole for a first punch to vertically penetrate through and match with the first punch to punch a membrane, and a vertically-arranged second punching through hole for a second punch to vertically penetrate through and match with the second punch to punch the membrane;
the die is provided with: a first groove located right below the first through hole for punching, and a second groove located right below the second through hole for punching; a first oil bag is vertically arranged in the first groove, and a second oil bag is vertically arranged in the second groove; the first oil bag and the second oil bag respectively comprise: the device comprises a vertical cylindrical main body part and a hemispherical upper convex part extending upwards from the top end of the main body part; the first oil bag and the second oil bag are filled with hydraulic oil; the main body part of the first oil bag and the first punch are coaxial; the main body part of the second oil bag is coaxial with the second punch;
the end faces of the bottom ends of the first punch and the second punch are respectively upwards sunken to form concave parts, and inner cavities of the concave parts of the first punch and the second punch are hemispherical; the inner concave part of the first punch is correspondingly matched with the upper convex part of the first oil bag; the inner concave part of the second punch is correspondingly matched with the upper convex part of the second oil bag; the upper convex parts of the first oil bag and the second oil bag are higher than the other upper convex part;
the bottom surface of the main body part of the first oil bag is fixedly connected with the bottom surface of the first groove; the bottom end of the main body part of the first oil bag is communicated with the bottom end of the main body part of the second oil bag through a first pipeline, a first pressure relief valve and a first one-way valve are arranged on the first pipeline, the first pressure relief valve is close to the joint of the first pipeline and the first oil bag, and the first one-way valve is close to the joint of the first pipeline and the second oil bag; the first pressure release valve is opened when the pressure in the first oil bag reaches a preset pressure; the first check valve only allows hydraulic oil to flow from the first oil bag to the second oil bag through the first pipeline;
the bottom surface of the main body part of the second oil bag is fixedly connected with the bottom surface of the second groove; the bottom end of the main body part of the second oil bag is also communicated with the bottom end of the main body part of the first oil bag through a second pipeline, a second pressure relief valve and a second one-way valve are arranged on the second pipeline, the second pressure relief valve is close to the joint of the second pipeline and the second oil bag, and the second one-way valve is close to the joint of the second pipeline and the first oil bag; the second pressure release valve is opened when the pressure in the second oil bag reaches a preset pressure; the second one-way valve only allows hydraulic oil to flow from the second oil bag to the first oil bag through the second pipeline;
the membrane punching method comprises the following steps:
1) Respectively placing two thin-wall products A and B which are hemispherical in shape in a first groove and a second groove of a die; the two side surfaces of the hemispherical thin-wall product are respectively an outer convex surface and an inner concave surface; the outer convex surface of the product A faces upwards, and the inner concave surface of the product A is attached to the upper convex part of the first oil pocket; the outer convex surface of the product B faces upwards, and the inner concave surface of the product B is attached to the upper convex part of the second oil pocket; at the moment, the upper convex part of the first oil bag is higher than the upper convex part of the second oil bag, and the product A is higher than the product B;
2) The template moves downwards to enable the template to be attached to the mold;
3) Flatly laying a membrane to be punched on the top surface of the template, so that the membrane covers the first punching through hole and the second punching through hole;
4) The first driving cylinder drives the first punch to move downwards, and the punch moves downwards to be matched with the first punching through hole of the template so as to punch the membrane; the first punched sheet continues to descend along with the first punch, and the first punch presses the first punched sheet on the outer convex surface of the product A; the first punch continues to move downwards, the first oil bag is pressed downwards, the pressure of hydraulic oil in the first oil bag reaches a preset pressure, the first pressure release valve is opened when the pressure in the first oil bag reaches the preset pressure, and hydraulic oil in the first oil bag flows to the second oil bag through the first pipeline; the first punch continues to descend until the upper convex part of the second oil bag is higher than the upper convex part of the first oil bag; at the moment, the first punch finishes pressing the first punching sheet into the outer convex surface of the product A; then the first driving cylinder drives the first punch to move upwards and reset;
5) The second driving cylinder drives the second punch to move downwards, and the punch moves downwards to be matched with the second punching through hole of the template so as to punch the diaphragm; the punched second punching sheet continues to descend along with a second punch, and the second punch presses the second punching sheet on the outer convex surface of the product B; the second punch continues to move downwards, the second oil bag is pressed downwards, the pressure of hydraulic oil in the second oil bag reaches a preset pressure, the second pressure release valve is opened when the pressure in the second oil bag reaches the preset pressure, and the hydraulic oil in the second oil bag flows to the first oil bag through the second pipeline; the second punch continues to descend until the upper convex part of the first oil bag is higher than the upper convex part of the second oil bag; at the moment, the second punch finishes pressing the second punching sheet into the outer convex surface of the product B; then the second driving cylinder drives the second punch to move upwards and reset;
6) Moving the template upwards to separate the template from the mold;
7) Taking out the product A and the product B in the mold;
8) Repeating steps 1) to 7).
2. The film blanking method of claim 1 wherein the cavities of the first and second recesses are both vertically cylindrical;
a first guide ring is sleeved at the top end of the main body part of the first oil bag, and the outer ring of the first guide ring is in sliding fit with the inner peripheral wall of the first groove;
and the top end of the main body part of the second oil bag is sleeved with a second guide ring, and the outer ring of the second guide ring is in sliding fit with the inner peripheral wall of the second groove.
3. The film blanking method of claim 2 wherein the first punch and the second punch are each internally provided with a heating rod.
CN202111251541.8A 2021-10-27 2021-10-27 Diaphragm punching method Active CN113942063B (en)

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JP2012230272A (en) * 2011-04-27 2012-11-22 Taika:Kk Stamper and method for manufacturing optical sheet using the same
CN103861927B (en) * 2014-03-18 2016-01-20 哈尔滨工业大学 A kind of sheet material multiple spot punch liquid filling deep-drawing forming device and method
CN105798122A (en) * 2016-05-26 2016-07-27 广东机电职业技术学院 Integrated molding die of duplex metal temperature disc and molding method of integrated molding die of duplex metal temperature disc
CN106079865B (en) * 2016-06-21 2018-12-21 苏州锦安新材料科技有限公司 A kind of heat transfer film automatic aligning transfer device adapting to flexible parent metal
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CN111299395B (en) * 2019-11-28 2021-12-24 哈尔滨理工大学 Magnetic medium auxiliary plate blanking forming device and method
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