CN114210792A - Mi-shaped diaphragm notching tool for liquid rocket engine - Google Patents
Mi-shaped diaphragm notching tool for liquid rocket engine Download PDFInfo
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- CN114210792A CN114210792A CN202111460220.9A CN202111460220A CN114210792A CN 114210792 A CN114210792 A CN 114210792A CN 202111460220 A CN202111460220 A CN 202111460220A CN 114210792 A CN114210792 A CN 114210792A
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- punch
- diaphragm
- guide sleeve
- scoring
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- 239000007788 liquid Substances 0.000 title claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 31
- 238000007906 compression Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- 240000007594 Oryza sativa Species 0.000 claims abstract 2
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract 2
- 235000009566 rice Nutrition 0.000 claims abstract 2
- 229910001315 Tool steel Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000013077 scoring method Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910000746 Structural steel Inorganic materials 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003721 gunpowder Substances 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
- B21D13/02—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/04—Centering the work; Positioning the tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/10—Incompletely punching in such a manner that the parts are still coherent with the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
一种液体火箭发动机米字型膜片刻痕工装，包括冲头、定位块、调整垫、压紧螺母、导向套、基座、底板；冲头由上到下分为冲头柄、冲头杆、刃口三部分；冲头柄上设有八个槽，用于保证在刻痕过程中精确分度，使八条刻痕线条准确的交于一点，刻出一个完整的米字形；冲头杆用于在冲头工作过程中定位导向，并避免刻痕过程中材料向心流动；调整垫用于调节刻痕深度；定位块用于保证刻痕位置；压紧螺母用于压住导向套；导向套用于定位冲头和膜片之间的位置；基座用于保证导向套的同轴度和垂直度；底板用于承载膜片和其他所有部件。
A liquid rocket engine rice-shaped diaphragm scoring tool, including a punch, a positioning block, an adjustment pad, a compression nut, a guide sleeve, a base, and a bottom plate; the punch is divided into a punch handle and a punch rod from top to bottom. 、Three parts of the cutting edge; there are eight grooves on the punch handle to ensure accurate indexing during the scoring process, so that the eight scoring lines accurately intersect at one point, and a complete rice shape is carved; the punch rod It is used for positioning and guiding during the working process of the punch, and avoiding the centripetal flow of the material during the scoring process; the adjusting pad is used to adjust the depth of the scoring; the positioning block is used to ensure the position of the scoring; the compression nut is used to press the guide sleeve; The guide sleeve is used to locate the position between the punch and the diaphragm; the base is used to ensure the coaxiality and verticality of the guide sleeve; the base plate is used to carry the diaphragm and all other components.
Description
Technical Field
The invention relates to a Mi-shaped diaphragm notching tool for a liquid rocket engine, and belongs to the technical field of liquid ramjet engines.
Background
The cartridge igniter is an electric initiating explosive device for a liquid rocket engine, safe and reliable ignition of the cartridge igniter plays a crucial role for the engine due to structural limitation, the diaphragm is positioned at the tail end of the igniter and blocks a propellant from entering the igniter to pollute gunpowder before ignition, and when the engine is ignited, high-temperature and high-pressure gas caused by burning the gunpowder breaks the diaphragm through the non-nicked surface, so that the engine is ignited and started smoothly, and the engine starts to work. The ignition of the igniter is an important link in the working process of the ramjet, the working performance, reliability and safety of the liquid ramjet are directly influenced, the diaphragm is used as a key part of the igniter, and the stable and reliable rupture pressure of the diaphragm plays an important role in smooth ignition of the engine. The most significant factor affecting the diaphragm rupture pressure is the residual thickness of the diaphragm score. Therefore, how to ensure the consistency of the residual thickness of the nick of the membrane becomes a problem to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the Mi-shaped membrane notching tool for the liquid rocket engine is provided, and the consistency of the residual notching thickness of the membrane is ensured; the device comprises a punch, a positioning block, an adjusting pad, a compression nut, a guide sleeve, a base and a bottom plate. The punch is used to score the film sheet. The positioning block and the adjusting pad are used for adjusting the position and the depth of the nick. The compression nut, the guide sleeve, the base and the bottom plate are used for positioning and fixing the diaphragm.
The purpose of the invention is realized by the following technical scheme:
a Mi-shaped diaphragm notching tool for a liquid rocket engine comprises a punch, a positioning block, an adjusting pad, a compression nut, a guide sleeve, a base and a bottom plate;
the punch is divided into a punch handle, a punch rod and a cutting edge from top to bottom; the punch head handle is provided with eight grooves for ensuring accurate indexing in the scoring process, so that eight scoring lines are accurately intersected at one point to form a complete Chinese character mi; the punch rod is used for positioning and guiding in the working process of the punch and preventing the material from centripetally flowing in the scoring process;
the adjusting pad is used for adjusting the depth of the nick; the positioning block is used for ensuring the nicking position; the compression nut is used for pressing the guide sleeve; the guide sleeve is used for positioning the position between the punch and the membrane; the base is used for ensuring the coaxiality and the verticality of the guide sleeve; the base plate serves to carry the membrane and all other components.
In one embodiment of the invention, the membrane is arranged on the bottom plate, and the membrane is positioned through the guide sleeve and the base; the base is connected with the bottom plate, and part of the guide sleeve is positioned in the base; after the compression nut is connected with the base, the diaphragm is fixed; the positioning block is arranged on the guide sleeve, and part of the positioning block is positioned in the compression nut; the adjusting pad is arranged on the positioning block; the punch sequentially penetrates through the adjusting pad, the positioning block and the guide sleeve to contact the membrane.
In one embodiment of the invention, the cutting edge die-in angle is 30 degrees +/-5', and the cutting edge height is 3 +/-0.1 mm.
In one embodiment of the present invention, the adjusting pad has different height specifications.
In one embodiment of the invention, the hole matched with the punch head of the compression nut is required to have a single-side clearance within 0.05mm, the shape and the edge of the hole are blunt, and the compression nut is in threaded connection with the base.
In one embodiment of the invention, the punch is made of alloy tool steel Cr12MoV material, and the heat treatment hardness is HRC60-HRC 65.
In one embodiment of the invention, the positioning block is respectively matched and positioned with the punch and the guide sleeve through the protruding positioning surfaces on the upper surface and the lower surface, so that the accurate nicking position is ensured in the nicking tool.
In one embodiment of the invention, the guide sleeve is matched and positioned with the adjusting pad through the positioning groove on the upper surface so as to ensure accurate positioning between the punch and the diaphragm.
In one embodiment of the invention, the mouth parts of the stud and the hole of the base are both chamfered to form obtuse angles, so that the guide sleeve and the compression nut can be smoothly guided in.
The assembly and scoring method adopting the rice-shaped diaphragm scoring tool comprises the following steps:
(1) placing the membrane on a bottom plate, and positioning the membrane through a guide sleeve and a base;
(2) installing and tightening a compression nut to fix the diaphragm;
(3) installing a positioning block and an adjusting pad, and selectively replacing the adjusting pad according to the requirements of different nicking depths of the diaphragm;
(4) and (3) loading the punch into the positioning block and the guide sleeve, scoring by a press machine after the installation is finished, taking out the punch after the first score is scored, reloading the positioning block and the guide sleeve after the positioning groove on the punch is rotated, and carrying out second score, wherein the steps are carried out until the final score is finished.
Compared with the prior art, the invention has the following beneficial effects:
(1) the Mi-shaped diaphragm scoring tool is simple and practical in structure and easy to operate, and can remarkably improve the efficiency of scoring the diaphragm;
(2) the die-entering angle of the cutting edge of the punch is 30 +/-5', and the height of the cutting edge is 3 +/-0.1 mm, so that the friction force can be effectively reduced, and the galling phenomenon in the extrusion process is prevented;
(3) according to the Mi-shaped membrane nicking tool, the punch, the positioning block, the guide sleeve and the base are matched and positioned with each other, so that an accurate position is ensured between the punch and the membrane, and the accuracy of the nicking position on the membrane is ensured;
(4) the adjusting pads with different height specifications are used for limiting and adjusting the indentation depth of the punch, simultaneously ensure the consistency of the indentation depth and ensure the stability and reliability of the rupture pressure of the diaphragm.
Drawings
FIG. 1 is a schematic structural view of a film notching tool in a shape like a Chinese character 'mi';
FIG. 2 is a schematic view of a punch construction;
FIG. 3 is a schematic view of the structure of the adjustment pad;
FIG. 4 is a schematic view of a positioning block;
FIG. 5 is a schematic view of a compression nut;
FIG. 6 is a schematic view of the structure of the guide sleeve;
FIG. 7 is a schematic view of a base structure;
fig. 8 is a schematic view of the bottom plate structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A Mi-shaped diaphragm scoring tool for a liquid rocket engine comprises a punch, a positioning block, an adjusting pad, a compression nut, a guide sleeve, a base and a bottom plate, and is shown in figure 1. After the bottom plate and the base are connected and fixed, the diaphragm is placed in the center of the bottom plate, the guide sleeve is arranged in the base, the adjusting pad is arranged on the guide sleeve, the guide sleeve is pressed and fixed by the aid of the mounting compression nut, and finally the guide sleeve is arranged in the punch to start scoring. The invention solves the problems of easy cutting through, poor notch depth consistency and the like in the process of notching the stainless steel diaphragm. The notching tool is simple in structure, convenient to operate and stable and reliable in notching process.
Specifically, the method comprises the following steps:
(1) punch head
The punch is one of the most important parts of the scoring die, as shown in fig. 2. It is composed of three parts of punch rod, cutting edge and punch handle.
The punch rod part is a guide part, the punch mainly plays a role in positioning and guiding in the working process and avoids material centripetal flow in the scoring process, the main parameters of the punch cutting edge are a die-entering angle of 30 degrees +/-5', the cutting edge height is 3 +/-0.1 mm, friction is mainly reduced, and galling is prevented from being generated in the extrusion process.
The eight grooves of the punch head handle part ensure accurate indexing in the scoring process, so that eight scoring lines are accurately intersected at one point to form a complete Chinese character 'mi', and the scoring depth is mainly adjusted by the difference of the thicknesses of the adjusting pads.
In order to ensure that eight scribed lines can be simultaneously torn during blasting and the tearing degrees are consistent, strict precision requirements are required for punch processing. The verticality, the parallelism and the roughness are all required to be not more than 0.01mm, the cutting edge and the cutter bar part are Ra0.4, and the rest is Ra0.8.
The punch head is made of alloy tool steel Cr12MoV considering strength, wear resistance and certain toughness. Heat treatment hardness: HRC60-HRC65, and the other requirements of the material are specified in GB 3278-82 technical conditions of carbon tool steel.
(2) Adjusting pad
The adjustment pad primarily functions to adjust the depth of the score in the scoring die, as shown in fig. 3. The notch depth is a main factor for judging whether the diaphragm can meet the requirement of blasting tearing under rated pressure, and the requirement of different notch depths of the diaphragm can be realized by replacing adjusting pads with different thicknesses. Adjusting the thickness of the pad: h1-10.2 mm, H2-10.3 mm, H3-10.4 mm, H4-10.5 mm and H5-10.7 mm, and the adjusting pads with different thicknesses are replaced according to the blasting condition during scoring.
The parallelism between the upper surface and the lower surface of the adjusting pad is required to be not more than 0.01 mm.
The material of the adjusting pad is alloy tool steel Cr12MoV, heat treatment HRC60-HRC65, and other requirements of the material are specified in GB 3278-82 technical conditions of carbon tool steel.
(3) Locating block
The positioning block is respectively matched and positioned with the punch and the guide sleeve through the protruding positioning surfaces on the upper surface and the lower surface, the effect of ensuring the nicking position is mainly played in the nicking die, and the structure is shown in figure 4.
The parallelism and the verticality of the positioning surface of the positioning block are not required to exceed 0.01 mm.
The positioning block is made of Cr12MoV alloy tool steel, subjected to heat treatment HRC60-HRC65, and subjected to other requirements according to GB 3278-82 technical conditions of carbon tool steel.
(4) Compression nut
The compression nut is mainly used for pressing the guide sleeve so as to ensure that the diaphragm can be accurately positioned and fixed before scoring, and meanwhile, the punch plays a precise guiding role in working, and the structure is shown in figure 5.
The hole matched with the punch is required to have a single-side clearance within 0.05mm, the sharp angle between the shape and the edge of the hole is blunt by 0.5 multiplied by 45 degrees, and the compression nut is in threaded connection with the base.
The material of the compression nut is 45# steel, heat treatment is performed on HRC 38-HRC 42, and other requirements of the material are specified in GB/T699-1999 high-quality carbon structural steel, and the outer surface of the compression nut is subjected to bluing treatment.
(5) Guide sleeve
The guide sleeve is matched and positioned with the adjusting pad through the positioning groove in the upper surface to ensure accurate positioning between the punch and the diaphragm, and the structure is shown in figure 6. The requirements of form and position tolerance coaxiality, verticality and parallelism are not more than 0.01mm, the surface roughness matching part is Ra0.8, and the rest part is Ra1.6.
The material of the guide sleeve is 45# steel, heat treatment is performed on HRC 38-HRC 42, and other requirements of the material are specified in GB/T699-1999 high-quality carbon structural steel, and the outer surface of the guide sleeve is subjected to bluing treatment.
(6) Base seat
The base is a key part for ensuring the coaxiality and verticality requirements of the guide sleeve, and is shown in figure 7. Therefore, the form and position tolerance is required to be not more than 0.01mm, and the roughness of the inner surfaces of the plane and the hole is Ra0.8 and Ra0.4. In order to lead the guide sleeve and the compression nut into the hole smoothly, the mouth parts of the stud and the hole of the base are chamfered by an angle of 0.5 multiplied by 45 degrees.
The base material is 45# steel, heat treatment is performed on HRC 38-HRC 42, and other requirements of the material are specified in GB/T699-1999 high-quality carbon structural steel, and the outer surface of the guide sleeve is subjected to bluing treatment.
(7) Base plate
The bottom plate is mainly used for connecting and fixing the working parts of the die, and is shown in figure 8. Meanwhile, the steel plate locally bears the pressure transmitted during scoring, so that the steel plate has enough rigidity and strength, the material is generally T8A, the quenching hardness is HRC50-HRC55, and other requirements are specified in GB/T699-1999 high-quality carbon structural steel. In order to ensure the precision of the die during working, the parallelism of the upper surface and the lower surface of the bottom plate is required to be not more than 0.01mm, and the roughness of the upper surface and the lower surface is required to be more than Ra0.8.
The following examples are intended to further illustrate the embodiments and effects of the present invention, but the present invention is not limited to the following examples. Fig. 1 is a schematic structural view of a film scoring tool, and fig. 2 to 8 are structural views of parts of an assembly tool.
As shown in fig. 1, the scoring tool and the punch are used for scoring the film. The positioning block and the adjusting pad are used for adjusting the position and the depth of the nick. The compression nut, the guide sleeve, the base and the bottom plate are used for positioning and fixing the diaphragm. The assembling and scoring method comprises the following steps:
(1) placing the membrane on a bottom plate, and positioning the membrane through a guide sleeve and a base;
(2) installing and tightening a compression nut to fix the diaphragm;
(3) and a positioning block and an adjusting pad are installed (the adjusting pad is selectively replaced according to the requirements of different nicking depths of the membrane).
(4) And (3) loading the punch into the positioning block and the guide sleeve, scoring by a press machine after the installation is finished, taking out the punch after the first score is scored, reloading the positioning block and the guide sleeve after the positioning groove on the punch is rotated, and carrying out second score, wherein the steps are carried out until the final score is finished.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111460220.9A CN114210792A (en) | 2021-12-02 | 2021-12-02 | Mi-shaped diaphragm notching tool for liquid rocket engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111460220.9A CN114210792A (en) | 2021-12-02 | 2021-12-02 | Mi-shaped diaphragm notching tool for liquid rocket engine |
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| Publication Number | Publication Date |
|---|---|
| CN114210792A true CN114210792A (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111460220.9A Pending CN114210792A (en) | 2021-12-02 | 2021-12-02 | Mi-shaped diaphragm notching tool for liquid rocket engine |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1050416A (en) * | 1973-06-18 | 1979-03-13 | Albert J. Holk (Jr.) | Score and tool for forming the score |
| US4877391A (en) * | 1986-08-11 | 1989-10-31 | Wmf Container Corporation | Apparatus for scoring rigid plastic sheet material |
| US4888073A (en) * | 1987-12-23 | 1989-12-19 | Nudvuck Enterprises | Evacuated insulation and a method of manufacturing same |
| US20120291512A1 (en) * | 2009-12-28 | 2012-11-22 | Pusan National University Industry- University Cooperation Foundation | Sheet-material forming device and method |
| CN110102636A (en) * | 2019-05-08 | 2019-08-09 | 沈阳航天新光集团有限公司 | The method for improving low pressure explosion piece manufacture stability |
| CN110369601A (en) * | 2019-06-27 | 2019-10-25 | 上海空间推进研究所 | Cut mark, shape are processed in the rupture disc tooling and its application method of one |
| CN111037222A (en) * | 2019-12-16 | 2020-04-21 | 西安航天发动机有限公司 | Machining method of six-blade intersection scoring cutter |
| CN213613634U (en) * | 2020-09-22 | 2021-07-06 | 靖江市东达新能源科技有限公司 | Integrated explosion-proof stainless steel button battery nick punch |
-
2021
- 2021-12-02 CN CN202111460220.9A patent/CN114210792A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1050416A (en) * | 1973-06-18 | 1979-03-13 | Albert J. Holk (Jr.) | Score and tool for forming the score |
| US4877391A (en) * | 1986-08-11 | 1989-10-31 | Wmf Container Corporation | Apparatus for scoring rigid plastic sheet material |
| US4888073A (en) * | 1987-12-23 | 1989-12-19 | Nudvuck Enterprises | Evacuated insulation and a method of manufacturing same |
| US20120291512A1 (en) * | 2009-12-28 | 2012-11-22 | Pusan National University Industry- University Cooperation Foundation | Sheet-material forming device and method |
| CN110102636A (en) * | 2019-05-08 | 2019-08-09 | 沈阳航天新光集团有限公司 | The method for improving low pressure explosion piece manufacture stability |
| CN110369601A (en) * | 2019-06-27 | 2019-10-25 | 上海空间推进研究所 | Cut mark, shape are processed in the rupture disc tooling and its application method of one |
| CN111037222A (en) * | 2019-12-16 | 2020-04-21 | 西安航天发动机有限公司 | Machining method of six-blade intersection scoring cutter |
| CN213613634U (en) * | 2020-09-22 | 2021-07-06 | 靖江市东达新能源科技有限公司 | Integrated explosion-proof stainless steel button battery nick punch |
Non-Patent Citations (1)
| Title |
|---|
| 夏巨谌: "塑性成形工艺及设备", vol. 1, 31 July 2001, 机械工业出版社, pages: 114 - 115 * |
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Application publication date: 20220322 |