CN112743624A - Auxiliary mechanism and method for forming hollow body edge clamping hole - Google Patents
Auxiliary mechanism and method for forming hollow body edge clamping hole Download PDFInfo
- Publication number
- CN112743624A CN112743624A CN202011474862.XA CN202011474862A CN112743624A CN 112743624 A CN112743624 A CN 112743624A CN 202011474862 A CN202011474862 A CN 202011474862A CN 112743624 A CN112743624 A CN 112743624A
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- insert
- punching
- hollow body
- driving device
- mold
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- 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
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
- B26F1/14—Punching tools; Punching dies
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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
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1845—Means for removing cut-out material or waste by non mechanical means
- B26D7/1854—Means for removing cut-out material or waste by non mechanical means by air under pressure
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses an auxiliary mechanism and a method for forming a hollow edge clamping hole, wherein the tool comprises an edge clamping hole forming mechanism and a blowing device. The edge clamping hole forming mechanism is provided with a punching driving device, an ejection driving device, a punching insert and matched left and right half-mold edge clamping inserts. Through contained side hole forming mechanism and gas blowing device, realized the shaping of hollow body contained side hole, solved prior art, EVOH layer exposes, the later process of deckle edge bits material and the waste material that punches a hole to and the difficult problem of fuel tank drawing of patterns. The punching insert advances for the second time, the waste material and the clamping edge are ingeniously cut off, the subsequent processing is not needed after the clamping edge hole is formed, the burr and scrap are reduced, and the production process is saved.
Description
Technical Field
The invention relates to the technical field of hollow body manufacturing, in particular to an auxiliary mechanism for forming a hollow body edge clamping hole and a method for forming the hollow body edge clamping hole.
Background
Generally, three options are available for the connection and fixation of an automobile plastic fuel tank and a vehicle body chassis in a host factory, wherein the first option is to connect and fix the plastic fuel tank and the vehicle body chassis by fastening a steel belt; the second is that the plastic fuel tank edge clamping hole is fixedly connected with the chassis of the vehicle body; and the third is that the steel belt and the plastic fuel tank clamping hole are connected and fixed with the chassis of the vehicle body together. The selection of the connection and fixation mode of the automobile plastic fuel tank and the automobile body chassis mainly depends on the requirement of a host factory on the connection and fixation mode. If the latter two connection and fixing methods are selected, the clamping holes are required to be formed in the plastic fuel tank forming process.
In the existing technology for forming the edge clamping hole of the plastic fuel tank, the first technology is that the edge clamping is in a plane state after the fuel tank is shaped, and a punch is used for punching the plane to form the edge clamping hole in the subsequent process; the second is to match with the die insert block to form the edge clamping hole when the fuel tank is formed.
By adopting the scheme, the EVOH layer is exposed after the first scheme punches the holes, the emission is increased, the potential failure risk which does not accord with the regulation appears, and the burr materials generated after punching the holes need to be processed in a subsequent second step; after the edge clamping hole is formed in the second scheme, punching waste needs to be processed in a subsequent second way and separated from the edge clamping hole of the plastic fuel tank, and the edge clamping hole is hung on the die insert after the plastic fuel tank is formed, so that the product is difficult to demould.
Disclosure of Invention
The invention aims to provide an auxiliary mechanism and a method for forming a hollow body edge clamping hole, which are used for solving the problems of EVOH (ethylene vinyl alcohol) layer exposure, subsequent processing of burr scraps and punching waste and difficulty in demoulding of the hollow body.
The invention is realized by the following technical scheme:
a hollow body edge clamping hole forming method comprises the following steps:
s1, opening the mold, and separating the left half mold and the right half mold to set positions;
s2, the punching driving device advances to drive the punching insert to advance to a set position for the first time;
s3, blanking the parison to a set position;
s4, closing the die, and forming the edge clamping hole by the punching insert through the die locking force of the forming machine in the die closing process of the left half die and the right half die; then, the process proceeds to step S5 or step S6, and if the process proceeds to step S5, the process proceeds to step S6 to step S8 in sequence after step S5 is finished; if the process proceeds to step S6, the process proceeds to step S5 after step S6 ends, and the process proceeds to step S7 and step S8 again after step S5 ends;
s5, after the die is closed in place, the blowing device blows air to cool the punching waste;
s6, the ejection driving device advances to drive the punching insert to advance to a set position for the second time, and the punching waste is ejected;
s7, after the high-pressure blowing is finished, the punching driving device and the ejection driving device retreat to drive the punching insert to retreat to the initial position;
and S8, opening the mold and taking out the molded hollow body.
Preferably, in the step 2), the punching insert needs to advance to the position once before the die is closed, and the distance of advancing to the position once is at least equal to that when the die is completely closed, the cutting edge of the punching insert is flush with the surface of the right half die edge insert.
A hollow body presss from both sides limit hole shaping complementary unit, is used for the hollow body to press from both sides limit hole shaping method of any one above-mentioned, including pressing from both sides limit hole shaping complementary unit and gas blowing unit;
the clamping hole forming mechanism comprises a punching driving device, an ejection driving device, a punching insert, a left half die clamping insert and a right half die clamping insert;
the output end of the punching driving device is connected with the ejection driving device, the output end of the ejection driving device is connected with one end of the punching insert, the punching insert is in clearance fit with the left half die clamping insert, and the right half die clamping insert is provided with a central channel corresponding to the punching insert;
the punching insert is provided with a central air blowing channel, and the right half die clamping edge insert is provided with an air blowing channel communicated with the central channel;
the blowing device is respectively connected with the central blowing channel and the blowing channel through pipelines.
Preferably, the punching driving device and the ejecting driving device do not synchronously operate.
Preferably, the ejection driving device is connected with the left half die through the punching driving device.
Preferably, the punching driving device and the ejection driving device are both one of a hydraulic oil cylinder, an air cylinder and a servo motor.
Preferably, the structure adopted by the front end of the punching insert is a chamfer inclined cutting edge, and the chamfer plays a role in guiding punching and reducing punching burrs.
Preferably, the diameters of the central air blowing channel and the air blowing channel are both 6-20 mm.
Preferably, the left half die clamping insert is arranged in the left half die, and the right half die clamping insert is arranged in the right half die.
Preferably, the rear part of the right half die clamping edge insert is a discharge channel, the front end of the discharge channel is connected with the central channel, and the rear end of the discharge channel is matched with the collecting device.
The invention has the beneficial effects that:
1) the auxiliary tool structure for forming the hollow body edge clamping hole and the forming method for the hollow body edge clamping hole, which are designed by the technical scheme, have the advantages that the problem of EVOH layer exposure can be solved and the emission increase is avoided under the condition that the working procedures are not increased in the die assembly process of a die.
2) This hollow body contained side hole shaping auxiliary fixtures structure that technical scheme designed advances through the secondary of inserting that punches a hole, and the ingenious waste material that cuts off is connected with the contained side, need not the back pass behind the contained side hole shaping and processes, reduces deckle edge bits material, practices thrift the advantage of production procedure.
3) According to the forming method of the hollow body edge clamping hole designed by the technical scheme, when the mold is opened, the hollow body edge clamping hole is separated from the punching insert, so that the friction resistance is avoided, the demolding of the hollow body is facilitated, and the risk of the product caused by stress at the joint line of the hollow body is avoided.
4) Compared with the existing subsequent process machining, the auxiliary tool structure for forming the hollow body edge clamping hole and the forming method for the hollow body edge clamping hole have the advantages of high consistency and stability, and are beneficial to reducing scrappage in production.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of an auxiliary tool for forming a hollow body clipping hole according to an embodiment of the present invention;
fig. 2 is a sectional view of an auxiliary tool for forming a hollow body clipping hole according to an embodiment of the present invention;
FIG. 3 is a schematic view of the process of step 2);
FIG. 4 is a schematic view of the process of step 4);
FIG. 5 is a partial sectional view of the internal state of the mold after the mold is closed in place in step 4);
FIG. 6 is a schematic view of the process of step 6);
FIG. 7 is a partial cross-sectional view of the internal state of the die after the punching insert of step 6) is advanced to the position for the second time;
FIG. 8 is a schematic view of the process of step 7);
fig. 9 is a partial cross-sectional view of the interior of the die after the punch insert has been retracted back in position at step 7).
Description of the reference numerals
1. The device comprises a punching driving device 2, an ejection driving device 3, a left half die clamping edge insert 4, an air blowing pipeline in the punching insert 5, a punching insert 6, a right half die clamping edge insert 7, a right half die air blowing channel 8, a left half die 9, a right half die 10 and a material discharging channel.
The specific implementation mode is as follows:
reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As shown in fig. 1 and 2, the application provides an auxiliary mechanism for forming a hollow body clipping edge hole, which comprises a clipping edge hole forming mechanism and an air blowing device; the blowing device comprises an air source, a pipeline and an electromagnetic valve, wherein the electromagnetic valve is arranged on the pipeline and used for opening or closing the pipeline, the electromagnetic valve is controlled by a controller, and the specific blowing time is controlled by the controller.
The flat edge hole forming mechanism comprises a punching driving device, an ejection driving device, a punching insert, a left half die clamping insert and a right half die clamping insert.
The output end of the punching driving device is connected with the ejection driving device, the output end of the ejection driving device is connected with one end of the punching insert, the punching insert is in clearance fit with the left half die clamping insert, and the right half die clamping insert is provided with a central channel corresponding to the punching insert; in the technical scheme of this application, ejecting drive arrangement passes through the drive arrangement that punches a hole and is connected with left half mould. In the technical scheme of this application, the punching drive device, the ejection drive device, and the punching insert are disposed on the left half die only for explaining the technical scheme of this application, and in practical application, according to the layout of the production line or the needs of the field, they may also be disposed on the right half die, and have the same technical effects.
The punching insert is provided with a central air blowing channel, the inner diameter of the central air blowing channel is 6-20mm, in the technical scheme of the application, the structure adopted by the front end of the punching insert is a chamfer inclined cutting edge, and the chamfer plays a role in punching guiding and reducing punching burrs.
An air blowing channel communicated with the central channel is arranged on the right half die clamping edge insert; the inner diameter of the air blowing channel is 6-20mm, and the central channel is used for accommodating the punching insert during the die closing process and secondary advancing of the punching insert so as to form a clamping hole and cut off punching waste.
The blowing device is respectively connected with the central blowing channel and the blowing channel through pipelines.
The punching driving device and the ejection driving device do not synchronously move, and the punching driving device drives the punching insert to advance for the first time when starting, and the ejection driving device does not move; after the punching waste is cooled, the ejection driving device moves forward again to drive the punching insert to move forward for the second time, but the punching driving device and the ejection driving device are not started simultaneously. When retreating, the punching driving device and the ejection driving device can retreat simultaneously or sequentially according to the design, for example, the ejection driving device retreats firstly to drive the punching insert to retreat for the first time, then the punching driving device retreats to drive the punching insert to retreat for the second time, and the punching insert retreats to the initial position.
The punching driving device and the ejection driving device are both one of a hydraulic oil cylinder, an air cylinder and a servo motor.
The left half die clamping edge insert is arranged in the left half die, and the right half die clamping edge insert is arranged in the right half die. The rear part of the right half-die clamping edge insert is a discharge channel, the front end of the discharge channel is connected with the central channel, and the rear end of the discharge channel is matched with the collecting device. The waste material ejected by the punch inserts exits the die along the discharge passage and falls into a collection device, which is typically any one of a collection bin, collection tube, collection bag, or other conventional container.
As shown in fig. 3 to 9, the present application provides a hollow body clipping hole forming method, which uses the hollow body clipping hole forming mechanism, and comprises the following steps:
and S1, opening the mold, and separating the left mold half and the right mold half to set positions.
S2, the punching driving device advances to drive the punching insert to advance to the set position for the first time.
And S3, blanking the parison to a set position.
S4, closing the die, and forming the edge clamping hole by the punching insert through the die locking force of the forming machine in the die closing process of the left half die and the right half die; then, the process proceeds to step S5 or step S6, and if the process proceeds to step S5, the process proceeds to step S6 to step S8 in sequence after step S5 is finished; when the process proceeds to step S6, the process proceeds to step S5 after step S6 is completed, and the process proceeds to step S7 and step S8 again after step S5 is completed.
And S5, after the die is closed in place, the blowing device blows air to cool the punching waste.
And S6, the ejection driving device advances to drive the punching insert to advance to the set position for the second time to eject the punching waste.
S7, after the high-pressure blowing is finished, the punching driving device and the ejection driving device retreat to drive the punching insert to retreat to the initial position; in the present application, high pressure blow is performed on the hollow body, and it is a conventional technical means in the art that the specific blow pressure varies according to the material of the hollow body, but the high pressure here is only a relative pressure, and it is not clear that the specific high pressure range is not performed here, and the use of the high pressure range is not affected, and it is clear for those skilled in the art to use the high pressure range. In the technical solution of the present application, the high pressure blowing is only one process, and the pressure level thereof is irrelevant to the technical solution of the present application, and therefore, it is not necessary to disclose the pressure range or the exact pressure range of the high pressure blowing.
And S8, opening the mold and taking out the molded hollow body.
And 2), the punching insert needs to advance once to the place after the die is opened, the distance of advancing once to the place is at least that when the die is completely closed, the cutting edge of the punching insert is flush with the insert surface of the clamping edge of the right half die, and the advancing driving time can be freely adjusted according to the set delay.
And 4) in the mold closing process, the temperature of the parison is above 140 ℃, the parison is in a molten state, the punching insert is matched with the right half mold edge clamping insert to extrude the parison, the edge clamping hole is punched and formed in the process, and the formed parison has good EVOH (ethylene vinyl alcohol) wrapping property.
And 5), blowing by the clamping edge hole blowing device of the left half die and the clamping edge insert blowing device of the right half die, cooling the molten waste, and freely adjusting the blowing time according to the setting delay.
And 6), the punching insert is driven by the ejection driving device to advance for the second time to the right position, the punching insert continues to advance at the punching position, the joint of the waste and the clamping edge is cut off, the waste is ejected, no obvious blank exists at the joint of the clamping edge hole, and the advancing time of the driving device can be freely adjusted according to the set delay.
And 7), finishing the forming of the edge clamping hole, and retreating the punching insert in place. When the die is opened, the edge clamping hole of the hollow body is separated from the punching insert, so that the friction resistance is avoided, and the demoulding of the hollow body is facilitated.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited by the above-mentioned embodiment, and any modifications, equivalents, improvements, etc. based on the described embodiment of the present invention should fall within the protection scope of the claims of the present invention.
Claims (10)
1. A hollow body edge clamping hole forming method is characterized by comprising the following steps:
s1, opening the mold, and separating the left half mold and the right half mold to set positions;
s2, the punching driving device advances to drive the punching insert to advance to a set position for the first time;
s3, blanking the parison to a set position;
s4, closing the die, and forming the edge clamping hole by the punching insert through the die locking force of the forming machine in the die closing process of the left half die and the right half die; then, the process proceeds to step S5 or step S6, and if the process proceeds to step S5, the process proceeds to step S6 to step S8 in sequence after step S5 is finished; if the process proceeds to step S6, the process proceeds to step S5 after step S6 ends, and the process proceeds to step S7 and step S8 again after step S5 ends;
s5, after the die is closed in place, the blowing device blows air to cool the punching waste;
s6, the ejection driving device advances to drive the punching insert to advance to a set position for the second time, and the punching waste is ejected;
s7, after the high-pressure blowing is finished, the punching driving device and the ejection driving device retreat to drive the punching insert to retreat to the initial position;
and S8, opening the mold and taking out the molded hollow body.
2. The method for forming a hollow body hemming hole of claim 1 wherein in step S2 the punch insert is advanced once before the mold is closed, the distance between the edges of the punch insert and the faces of the right half mold hemming insert being at least as long as the edges of the punch insert are flush with each other when the mold is fully closed.
3. An auxiliary mechanism for forming a hollow body clipping hole, used for the hollow body clipping hole forming method of any one of the above claims 1 or 2, characterized by comprising a clipping hole forming mechanism and a blowing device;
the clamping hole forming mechanism comprises a punching driving device, an ejection driving device, a punching insert, a left half die clamping insert and a right half die clamping insert;
the output end of the punching driving device is connected with the ejection driving device, the output end of the ejection driving device is connected with one end of the punching insert, the punching insert is in clearance fit with the left half die clamping insert, and the right half die clamping insert is provided with a central channel corresponding to the punching insert;
the punching insert is provided with a central air blowing channel, and the right half die clamping edge insert is provided with an air blowing channel communicated with the central channel;
the blowing device is respectively connected with the central blowing channel and the blowing channel through pipelines.
4. The hollow body framing hole molding assist mechanism of claim 3, wherein the punch drive and the ejector drive are not synchronized.
5. The hollow body framing hole molding assist mechanism of claim 3, wherein the ejection drive is connected to the left mold half by a punch drive.
6. The hollow body edging hole forming auxiliary mechanism according to claim 3, wherein the punching driving device and the ejection driving device are each one of a hydraulic cylinder, an air cylinder and a servo motor.
7. The hollow body trim hole forming auxiliary mechanism of claim 3, wherein the front end of the punching insert is configured as a chamfer angle, and the chamfer angle is used for guiding the punching and reducing punching burrs.
8. The hollow body boresight hole molding aid according to claim 3, wherein the central blowing channel and the blowing channel each have a diameter of 6-20 mm.
9. The hollow body trim hole molding assist mechanism of claim 3, wherein the left half-mold trim insert is disposed in the left half-mold and the right half-mold trim insert is disposed in the right half-mold.
10. The hollow body double-edged hole forming auxiliary mechanism of claim 3, wherein the rear portion of the right half-die double-edged insert is a discharge channel, the front end of the discharge channel is connected with the central channel, and the rear end of the discharge channel is matched with the collecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011474862.XA CN112743624B (en) | 2020-12-14 | 2020-12-14 | Auxiliary mechanism and method for forming hollow body edge clamping hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011474862.XA CN112743624B (en) | 2020-12-14 | 2020-12-14 | Auxiliary mechanism and method for forming hollow body edge clamping hole |
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| CN112743624A true CN112743624A (en) | 2021-05-04 |
| CN112743624B CN112743624B (en) | 2022-05-20 |
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| Publication number | Publication date |
|---|---|
| CN112743624B (en) | 2022-05-20 |
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