CN114311746B - Spring support clamping piece of carbon fiber composite material armor piercing bullet, forming method and forming die - Google Patents
Spring support clamping piece of carbon fiber composite material armor piercing bullet, forming method and forming die Download PDFInfo
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- CN114311746B CN114311746B CN202111640648.1A CN202111640648A CN114311746B CN 114311746 B CN114311746 B CN 114311746B CN 202111640648 A CN202111640648 A CN 202111640648A CN 114311746 B CN114311746 B CN 114311746B
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 79
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 79
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 36
- 239000004744 fabric Substances 0.000 claims abstract description 29
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 239000002313 adhesive film Substances 0.000 claims description 10
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 244000137852 Petrea volubilis Species 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 9
- 238000007723 die pressing method Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 241000446313 Lamella Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Moulding By Coating Moulds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of armor-piercing bullet holders, and particularly relates to a bullet holder clamping piece of a carbon fiber composite armor-piercing bullet, a forming method of the bullet holder clamping piece and a forming die. The invention combines the advantages of the chopped carbon fiber prepreg in the complicated shape and the high strength of the continuous fiber, divides the structure of the elastic support clamping valve into the tooth reinforcing plate and the shell, the tooth reinforcing plate is embedded in the ring groove of the shell, the tooth strength is enhanced, the tooth reinforcing plate is formed by adopting the fabric carbon fiber prepreg for mould pressing and processing, the shell is formed by mould pressing the chopped carbon fiber prepreg, compared with the continuous carbon fiber mould pressing technology, the laying time in the manufacturing process is greatly shortened, and the manufacturing efficiency is improved; compared with the die pressing process of the chopped carbon fiber prepreg, the strength of teeth is improved through the tooth reinforcing plate, and the teeth are prevented from being broken when the armor-piercing shell is launched; compared with a metal spring holder, the density of the product of the method can be reduced to 1.4g/cm 3 And the negative quality in the transmitting process is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of armor-piercing bullet holders, and particularly relates to a bullet holder clamping flap of a carbon fiber composite armor-piercing bullet, a forming method and a forming die.
Background
The bullet holds in the palm to be the important component part of armor-piercing bullet, and the bullet that most uses at present holds in the palm the saddle-shaped structure (see fig. 1) that divide equally into three or four bullet hold in the palm the card lamella along its axial, and the bullet holds in the palm the lamella and is including the cross-section for fan annular shell, and the inner wall of shell evenly is equipped with fan annular tooth along the axial, and the outer wall of shell is equipped with preceding centering portion and back centering portion along the axial interval in proper order, and the outer peripheral face of back centering portion still is equipped with the bullet trough of a groove. When the armor-piercing bullet is launched, three or four clamping petals fully hug the armor-piercing bullet body, the clamping petals and the armor-piercing bullet body are axially fixed through annular teeth of the clamping petals, and impact force generated by explosion of the ammunition is transmitted to the armor-piercing bullet body through the bullet holder, so that the armor-piercing bullet body obtains the optimal initial speed. After the bullet is discharged from the chamber, the bullet support clamping valve is separated from the bullet body under the resistance action generated by the head-on airflow and the aftereffect action of gunpowder and gas.
At present, the armor-piercing bullet holder is made of metal materials, light composite materials and the like, and the bullet holder made of the metal materials can generate larger negative quality during the launching, influence the initial speed of the armor-piercing bullet and cause certain influence on the flight of the armor-piercing bullet; while the spring support made of the light composite material greatly reduces the negative quality, the prior art mostly adopts an injection molding process or a compression molding process, the former has lower fiber volume content, the tooth area is easy to be rich in resin, the tooth strength is low, and the damage in the process of transmitting is easy to occur; if the short carbon fiber prepreg is adopted, the same problems as the injection molding process can occur, and if the continuous carbon fiber prepreg is adopted, the tooth region of the spring support and the complex appearance thereof are not easy to be laid and molded, and the efficiency is low. Referring to Chinese patent literature (application number 202110259766.1), a stable tail-wing shelling armor-piercing bullet holder and a preparation method thereof are disclosed, tooth buds of the tail-wing shelling armor-piercing bullet holder are formed by processing and combining a plurality of carbon fiber molding plates with different layering angles and layering thicknesses, and an outer shell is formed by compression molding of chopped carbon fiber prepreg yarns; the preparation method comprises the steps of spring support design, tooth bud preforming, valve clamping forming and the like, and has the following technical defects: 1. the tooth paving process has low efficiency and poor quality stability; 2. the single 120-degree clamping valve needs more than three curing processes, namely curing of a plurality of tooth-shaped blocks, bonding among the tooth-shaped blocks and co-bonding curing of a final shell and teeth, so that the energy consumption is high, the efficiency is low, and the required equipment is more in tools; 3. the structural integrity is poor, a great number of cementing interfaces exist, and the damage is easy to generate.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a bullet-supporting clamping flap of a carbon fiber composite armor-piercing bullet, a forming method thereof and a forming die thereof.
In order to achieve the purpose of the invention, the technical scheme adopted is as follows: the shell is formed by integrally molding chopped carbon fiber prepreg, and comprises a shell with a sector-shaped section, a plurality of sector-shaped teeth uniformly and alternately arranged on the inner wall of the shell along the axial direction of the shell, and a front centering part and a rear centering part sequentially arranged on the outer wall of the shell at intervals along the axial direction of the shell; the shell is provided with a ring groove at the same side of the teeth along the axial direction of the shell, the tooth reinforcing plate is fixedly embedded in the ring groove, and the tooth reinforcing plate and the teeth are completely and tightly attached to one side of the groove; the tooth reinforcing plate is obtained by cutting a carbon fiber composite material laminated plate, wherein the carbon fiber composite material laminated plate is formed by laying a fabric carbon fiber prepreg on a flat plate die according to the designed laying angle and number and then heating and pressurizing by a press.
The invention relates to a forming method of a bullet holder clamping flap of a carbon fiber composite material armor piercing bullet, which comprises the following steps:
1) Laying the fabric carbon fiber prepregs on a flat plate mold according to the designed laying angle and number, transferring the fabric carbon fiber prepregs into a hot molding flat plate mold, and heating and pressurizing the fabric carbon fiber prepregs through a press to heat and solidify the fabric carbon fiber prepregs to obtain a carbon fiber composite material laminated plate;
2) A plurality of tooth reinforcing plates are obtained by machining the carbon fiber composite material laminated plate, and the surfaces of the tooth reinforcing plates are polished by sand paper (150 # sand paper) and then cleaned by volatile solvents (such as alcohol, acetone and the like);
3) And sticking an adhesive film on the tooth reinforcing plate, sequentially embedding the adhesive film into a tooth groove of a spring support clamping valve forming die, paving a chopped carbon fiber prepreg to form a preformed body for forming teeth, a shell, a front centering part and a rear centering part, closing the die, and finally heating and curing to obtain the spring support clamping valve.
Further, the carbon fibers used in the fabric carbon fiber prepreg are T700 and above, and the type of the used fabric is warp knitting fabric woven by fibers in the directions of 0 DEG and 90 DEG; the resin system used by the fabric carbon fiber prepreg is an epoxy resin system with the temperature resistance exceeding 180 ℃.
Further, the carbon fiber used in the chopped carbon fiber prepreg is T300 and above, the fiber length is 10-30mm, and the resin system used is an epoxy resin system with the temperature resistance exceeding 180 ℃.
Further, the adhesive film is an epoxy resin adhesive film with the temperature resistance exceeding 180 ℃.
The invention also provides a mould for forming the bullet support clamping valve of the carbon fiber composite armor-piercing bullet, which comprises a lower mould, an insert assembly and an upper mould, wherein the top of the lower mould is provided with a lower mould groove with a sector ring-shaped cross section, the bottom of the lower mould groove is sequentially and uniformly provided with a plurality of tooth grooves at intervals along the front-back direction, the groove walls of the tooth grooves on the same side along the front-back direction are sloping surfaces, a forming gap is reserved between a tooth reinforcing plate embedded in the tooth grooves and the sloping surfaces, and the insert assembly comprises a first insert, a second insert and a third insert; when the die is used, the first insert, the second insert and the third insert are detachably buckled in the groove of the lower die in sequence along the front-back direction, the upper die is detachably buckled at the top of the lower die, the shell is formed in a forming cavity formed by the first insert, the second insert, the third insert, the upper die, the tooth reinforcing plate and the lower die, the tooth is formed in the forming gap, the front centering part is formed in the gap formed by the first insert, the upper die and the shell, and the rear centering part is formed in the gap formed by the shell, the second insert, the third insert and the upper die.
Compared with the prior art, the invention combines the advantages of the chopped carbon fiber prepreg in forming complex shapes and the high strength of continuous fibers, divides the structure of the elastic support clamping valve into the tooth reinforcing plate and the shell, the tooth reinforcing plate is embedded in the ring groove of the shell, enhances the tooth strength, the tooth reinforcing plate is formed by adopting the fabric carbon fiber prepreg for mould pressing and processing, and the shell is formed byThe chopped carbon fiber prepreg is formed by die pressing, and compared with a continuous carbon fiber die pressing process, the method has the advantages that the laying time in the manufacturing process is greatly shortened, and the manufacturing efficiency is improved; compared with the die pressing process of the chopped carbon fiber prepreg, the strength of teeth is improved through the tooth reinforcing plate, and the teeth are prevented from being broken when the armor-piercing shell is launched; compared with a metal spring holder, the density of the product of the method can be reduced to 1.4g/cm 3 And the negative quality in the transmitting process is greatly reduced.
Drawings
Fig. 1 is an exploded view of the overall structure of the spring holder according to the background art of the invention.
Fig. 2 is a schematic structural view of a pop-up latch according to an embodiment of the present invention.
Fig. 3 is a schematic partial structure of a pop-up latch according to an embodiment of the present invention.
Fig. 4 is a schematic view of a mold for molding a pop-up card flap in a mold-closing state according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a lower die of a die for forming a pop-up card flap according to an embodiment of the present invention.
Fig. 6 is an enlarged schematic view at a in fig. 5.
Fig. 7 is a schematic cross-sectional view of a mold for molding a pop-up card flap in a mold-closed state according to an embodiment of the present invention.
The reference numerals in the drawings are: 1-1 parts of a shell, 1-2 parts of teeth, 1-3 parts of a rear centering part, 1-4 parts of a front centering part, 1-5 parts of a spring groove, 2 parts of a tooth reinforcing plate, 3 parts of an upper die, 4 parts of a lower die, 4-1 parts of a slope surface, 5 parts of a vacuum suction nozzle, 7 parts of a tooth groove, 8 parts of an ejection mechanism, 9 parts of a guide post, 10 parts of a sealing ring, 11 parts of a first insert, 12 parts of a second insert and 13 parts of a third insert.
Description of the embodiments
The present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in various other embodiments according to the present invention, or simply change or modify the design structure and thought of the present invention, which fall within the protection scope of the present invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described in detail below in connection with the examples:
the bullet support clamping flap of the carbon fiber composite material armor piercing bullet comprises a shell and a sector-shaped tooth reinforcing plate 2, wherein the shell is formed by integrally molding a chopped carbon fiber prepreg, and comprises a sector-shaped shell 1-1, a plurality of sector-shaped teeth uniformly and alternately arranged on the inner wall of the shell 1-1 along the axial direction of the shell 1-1, a front centering part 1-4 and a rear centering part 1-3 sequentially and alternately arranged on the outer wall of the shell 1-1 along the axial direction of the shell 1-1, and a bullet groove 1-5 is further formed on the outer peripheral surface of the rear centering part 1-3; the shell 1-1 is provided with a ring groove on the same side of the teeth along the axial direction of the shell 1-1, the tooth reinforcing plate 2 is fixedly embedded in the ring groove, and the tooth reinforcing plate 2 and one side of the teeth facing the groove are completely and tightly attached; the tooth reinforcing plate 2 is obtained by cutting a carbon fiber composite material laminated plate, wherein the carbon fiber composite material laminated plate is formed by laying a fabric carbon fiber prepreg on a flat plate die according to a designed laying angle and number and then heating and pressurizing by a press.
The mould for forming the bullet support clamping valve of the carbon fiber composite armor-piercing bullet of the embodiment comprises a lower mould 4, an insert assembly and an upper mould 3, wherein a lower mould groove with a fan-shaped section is formed in the top of the lower mould 4, a plurality of tooth grooves 7 are sequentially and uniformly formed at intervals in the front-back direction at the bottom of the lower mould groove, the groove walls of the same sides of the tooth grooves 7 in the front-back direction are sloping surfaces, a forming gap is reserved between a tooth reinforcing plate 2 embedded in the tooth grooves 7 and the sloping surfaces, the insert assembly comprises a first insert 11, a second insert 12 and a third insert 13 which are sequentially and detachably buckled at the top of the lower mould 4 in the front-back direction, the upper mould 3 is detachably buckled at the top of the insert assembly, and a shell is formed in a forming cavity formed by the first insert 11, the second insert 12, the third insert 13, the upper mould 3 and the tooth reinforcing plate 2 and the lower mould 4, wherein teeth are formed in the forming gap.
Specifically, the main body profile of the lower die corresponds to the tooth surface of the spring support clamping valve, and consists of a tooth forming surface, two inclined surfaces and two vertical surfaces, and in addition, the parting surface of the lower die periphery is also formed. The parting surface of the peripheral ring at the top of the lower die is provided with a guide post, the height of the guide post is 15-25mm, the draft angle of the guide post is 3-5 degrees, and the bottom and the top of the guide post are rounded by R2-3 mm. The parting surface along the circumference of the top of the lower die is provided with an annular sealing groove, a sealing ring is arranged in the parting surface, the sealing ring is made of fluororubber, the cross section of the sealing ring is circular, the diameter of the sealing ring is slightly larger than the width of the sealing groove by 0.2-0.5mm, the sealing groove is used for ensuring the tightness of the elastic support clamping flap forming area, the cross section of the sealing groove is rectangular, the depth of the sealing groove is 2-3mm, and the width of the sealing groove is 4-5mm.
The ejection mechanism is positioned on two inclined planes of the lower die, the ejection position is positioned below the spring support clamping piece, and the ejection mechanism is controlled by the oil cylinder.
Further, the first insert is inlaid in a cavity formed by the shell, the lower die, the upper die and the front centering part, and the appearance of the first insert is consistent with that of the cavity;
further, the second insert is embedded in a cavity formed by the shell, the lower die, the upper die and one side of the rear centering part, which is close to the front centering part, and the inclined surface of the second insert, which is clung to the upper die, is provided with a die drawing angle of 3-5 degrees, so that the die clamping force of the upper die can be transmitted to the rear centering part;
further, the third insert is embedded in a cavity formed by the shell, the lower die, the upper die and the rear centering part and far away from the front centering part, and a die drawing angle is set on the inclined surface of the upper die, wherein the angle is 3-5 degrees, so that the die clamping force of the upper die can be transmitted to the shell 3;
further, the device also comprises a guide hole in guide fit with the guide post;
further, the vacuum-pumping device also comprises two vacuum-pumping nozzles, wherein the vacuum-pumping nozzles are positioned on the parting surface of the upper die and are distributed diagonally, and the openings of the vacuum-pumping nozzles are positioned in the area surrounded by the sealing groove of the lower die.
The method for forming the bullet support clamping valve of the armor-piercing bullet made of the carbon fiber composite material based on the die comprises the following steps of:
(1) Laying the fabric carbon fiber prepregs on a flat plate mold according to the designed laying angle and number, transferring the fabric carbon fiber prepregs into a hot molding flat plate mold, and heating and pressurizing the fabric carbon fiber prepregs through a press to heat and solidify the fabric carbon fiber prepregs to obtain a solidified carbon fiber composite material laminated plate; then, a plurality of tooth reinforcing plates 2 are obtained through machining, and the surfaces of the tooth reinforcing plates 2 are polished by sand paper (150 # sand paper) and then cleaned by volatile solvents (such as alcohol, acetone and the like) for standby.
(2) The semi-permanent release agent is smeared on the surfaces of the upper die 3 and the lower die 4, and a sealing ring 10 is embedded in a sealing groove of the lower die 4;
(3) A glue film is stuck on the tooth reinforcing plate 2 and then is embedded in the tooth groove;
(4) Filling gaps between the tooth reinforcing plates 2 and the slope with chopped carbon fiber prepreg, and stacking a preformed body of the shell 1-1;
(5) Sequentially placing a first insert 11, a second insert 12 and a third insert 13 on the stacked shell 1-1 according to the size of a workpiece;
(6) Stacking the pre-forms of the front centering portions 1-4 at the first insert 11 with chopped carbon fiber prepregs, and stacking the pre-forms of the rear centering portions 1-3 between the second insert 12 and the third insert 13;
(7) The upper die 3 and the lower die 4 are clamped, the parting surface gap of the upper die 3 and the lower die 4 is 0.2-0.3mm, and the upper die 3 is provided with a bulge for forming the elastic belt groove 1-5;
(8) Opening a vacuumizing nozzle 5 and communicating the vacuumizing nozzle with a vacuumizing system to enable the vacuum degree of a die cavity of the upper die and the lower die to be more than-0.95 Bar, heating the die to the curing temperature of the chopped carbon fiber prepreg, closing the vacuumizing nozzle 5, closing the upper die and the lower die at a moving speed of less than 1mm/min, and applying a die closing pressure of not less than 10MPa to the upper die 3 after the die is closed; after the resin in the chopped carbon fiber prepreg is kept at the curing temperature for a certain time, the resin is fully cured and then cooled (generally cooled to a temperature 10-20 ℃ below the glass transition temperature of the resin of the chopped carbon fiber prepreg at a rate of 1-3 ℃);
(9) Opening the die and taking out the spring support clamping valve;
(10) And removing residual resin on the surfaces of the upper die and the lower die, re-smearing the release agent, replacing the aged or damaged sealing ring 10, and entering the next cycle.
In the forming method, the carbon fibers used by the carbon fiber prepreg of the fabric are T700 and above, the type of the fabric is warp knitted fabric, the angle of the fabric is 0 degree/90 degree, and the resin system is an epoxy resin system with the temperature resistance exceeding 180 ℃; the carbon fibers used in the chopped carbon fiber prepreg are T300 and above, the fiber length is 10-30mm, and the resin system is an epoxy resin system with the temperature resistance exceeding 180 ℃; the adhesive film is an epoxy resin adhesive film with the temperature resistance exceeding 180 ℃.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme and the concept of the present invention, and should be covered by the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Claims (5)
1. A forming method of a bullet support clamping flap of a carbon fiber composite armor piercing bullet is characterized by comprising the following steps of: the spring support clamping valve comprises a shell and a sector ring-shaped tooth reinforcing plate; the shell is formed by integrally molding chopped carbon fiber prepreg and comprises a shell with a sector-shaped cross section, a plurality of sector-shaped teeth uniformly and alternately arranged on the inner wall of the shell along the axial direction of the shell, and a front centering part and a rear centering part which are sequentially and alternately arranged on the outer wall of the shell along the axial direction of the shell; the shell is provided with a ring groove at the same side of the teeth along the axial direction of the shell, the tooth reinforcing plate is fixedly embedded in the ring groove, and the tooth reinforcing plate and the teeth are completely and tightly attached to one side of the ring groove; the tooth reinforcing plate is obtained by cutting a carbon fiber composite material laminated plate, wherein the carbon fiber composite material laminated plate is formed by laying a fabric carbon fiber prepreg on a flat plate die according to a designed laying angle and number and then heating and pressurizing by a press;
the forming method of the bullet support clamp valve comprises the following steps:
1) Laying the fabric carbon fiber prepregs on a flat plate mold according to the designed laying angle and number, transferring the fabric carbon fiber prepregs into a hot molding flat plate mold, and heating and pressurizing the fabric carbon fiber prepregs through a press to heat and solidify the fabric carbon fiber prepregs to obtain a carbon fiber composite material laminated plate;
2) A plurality of tooth reinforcing plates are obtained by machining the carbon fiber composite material laminated plate, and the surfaces of the tooth reinforcing plates are cleaned by adopting volatile solvents after being polished by sand paper;
3) And sticking an adhesive film on the tooth reinforcing plate, sequentially embedding the adhesive film into a tooth groove of a spring support clamping valve forming die, paving a chopped carbon fiber prepreg to form a preformed body for forming teeth, a shell, a front centering part and a rear centering part, closing the die, and finally heating and curing to obtain the spring support clamping valve.
2. The method for forming the bullet holder card flap of the carbon fiber composite armor piercing bullet according to claim 1, which is characterized in that: the carbon fiber used by the carbon fiber prepreg of the fabric is T700 or more, the type of the fabric is warp knitted fabric woven by fibers at the directions of 0 DEG and 90 DEG, and the resin system used by the carbon fiber prepreg of the fabric is an epoxy resin system with the temperature resistance exceeding 180 ℃.
3. The method for forming the bullet holder card flap of the carbon fiber composite armor piercing bullet according to claim 1, which is characterized in that: the carbon fiber used in the chopped carbon fiber prepreg is T300 and above, the fiber length is 10-30mm, and the resin system used is an epoxy resin system with the temperature resistance exceeding 180 ℃.
4. The method for forming the bullet holder card flap of the carbon fiber composite armor piercing bullet according to claim 1, which is characterized in that: the adhesive film is an epoxy resin adhesive film with the temperature resistance exceeding 180 ℃.
5. A mold for forming a pop-up clip of the carbon fiber composite armor piercing bullet of claim 1, comprising: the die comprises a lower die, an insert assembly and an upper die, wherein a lower die groove with a fan-shaped cross section is formed in the top of the lower die, a plurality of tooth grooves are sequentially and uniformly formed at the bottom of the lower die groove at intervals along the front-back direction, the groove walls of the tooth grooves on the same side along the front-back direction are sloping surfaces, a forming gap is reserved between a tooth reinforcing plate embedded in the tooth grooves and the sloping surfaces, and the insert assembly comprises a first insert, a second insert and a third insert; when the die is used, the first insert, the second insert and the third insert are detachably buckled in the groove of the lower die in sequence along the front-back direction, the upper die is detachably buckled at the top of the lower die, the shell is formed in a forming cavity formed by the first insert, the second insert, the third insert, the upper die, the tooth reinforcing plate and the lower die, the tooth is formed in the forming gap, the front centering part is formed in the gap formed by the first insert, the upper die and the shell, and the rear centering part is formed in the gap formed by the shell, the second insert, the third insert and the upper die.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111640648.1A CN114311746B (en) | 2021-12-29 | 2021-12-29 | Spring support clamping piece of carbon fiber composite material armor piercing bullet, forming method and forming die |
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| CN202111640648.1A CN114311746B (en) | 2021-12-29 | 2021-12-29 | Spring support clamping piece of carbon fiber composite material armor piercing bullet, forming method and forming die |
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| CN114311746B true CN114311746B (en) | 2023-11-14 |
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| CN115235289A (en) * | 2022-06-30 | 2022-10-25 | 江苏恒神股份有限公司 | Composite material bullet holder and forming method |
| CN116576734B (en) * | 2023-07-13 | 2023-09-01 | 北京理工大学 | Bullet holds in palm, projectile body subassembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5972264A (en) * | 1997-06-06 | 1999-10-26 | Composite Rotor, Inc. | Resin transfer molding of a centrifuge rotor |
| CN112902762A (en) * | 2021-03-10 | 2021-06-04 | 宁波曙翔新材料股份有限公司 | Tail wing stable unshelling armor-piercing bullet holder and preparation method thereof |
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2021
- 2021-12-29 CN CN202111640648.1A patent/CN114311746B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5972264A (en) * | 1997-06-06 | 1999-10-26 | Composite Rotor, Inc. | Resin transfer molding of a centrifuge rotor |
| CN112902762A (en) * | 2021-03-10 | 2021-06-04 | 宁波曙翔新材料股份有限公司 | Tail wing stable unshelling armor-piercing bullet holder and preparation method thereof |
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| CN114311746A (en) | 2022-04-12 |
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