CN110981647A - Shaping method and cutter for vacuum casting gunpowder product - Google Patents
Shaping method and cutter for vacuum casting gunpowder product Download PDFInfo
- Publication number
- CN110981647A CN110981647A CN201911307658.6A CN201911307658A CN110981647A CN 110981647 A CN110981647 A CN 110981647A CN 201911307658 A CN201911307658 A CN 201911307658A CN 110981647 A CN110981647 A CN 110981647A
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- Prior art keywords
- positioning
- cutter
- shaping
- positioning ring
- face
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
- C06B21/0058—Shaping the mixture by casting a curable composition, e.g. of the plastisol type
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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
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/0006—Cutting members therefor
-
- 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
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
-
- 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
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/0006—Cutting members therefor
- B26D2001/0033—Cutting members therefor assembled from multiple blades
-
- 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
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/0006—Cutting members therefor
- B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a shaping method and a cutter for vacuum casting gunpowder products, wherein the method comprises the following steps: 1) end face reshaping, which specifically comprises the following operations: pressing the cutting part of the end face shaping cutter on the powder surface, and rotating the end face shaping cutter to cut the end face of the powder; when the positioning table of the end face shaping cutter is contacted with the end face of the metal shell, cutting is stopped; 2) shaping the hole wall, specifically operating as follows: the positioning ring is arranged at one end of the metal shell for end face shaping; inserting a hole wall reshaping cutter into the positioning ring; cutting until the baffle is contacted with the end face of the boss of the positioning ring; 3) the spherical hole bottom shaping method specifically comprises the following operations: the positioning ring is arranged at one end of the metal shell for end face shaping; inserting a spherical hole bottom reshaping cutter into the positioning ring; and cutting until the baffle is contacted with the end face of the boss of the positioning ring. The invention is efficient and safe, can cut the surface of gunpowder product to be shaped flat, and can finish the gunpowder product to a smaller depth.
Description
Technical Field
The invention relates to a vacuum casting molding gunpowder product shaping method and a cutter.
Background
Powder vacuum casting molding is a process for pouring powder raw materials in a molten state into a space between a shell and a core mold under a vacuum condition. The defects of the process are that after gunpowder is solidified and dried, the surface roughness of the free gunpowder surface is large, the flatness is poor, and the size of an inner hole is easy to shrink, so that the shaping is needed.
During the processing of initiating explosive devices, extrusion, high temperature and sparks can ignite the initiating explosive devices, and if the initiating explosive devices explode, serious consequences are caused, so that absolute safety of the shaping and cutting process must be guaranteed. Safety factors are fully considered in the aspects of shaping process, shaping cutter structure and cutter material design.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method and a cutter for shaping a vacuum cast molding gunpowder product, which are efficient and safe, can cut the surface of the gunpowder product to be shaped flat, can trim a smaller depth of the gunpowder product, and can shape the diameter size of the gunpowder product.
The technical scheme adopted by the invention is as follows:
a shaping method of vacuum casting gunpowder product comprises a cylindrical metal shell, wherein vacuum casting gunpowder is arranged in the metal shell, and the shaping method comprises the following steps:
1) end face reshaping, which specifically comprises the following operations:
a. putting the end face shaping cutter into the gunpowder product;
b. pressing the cutting part of the end face shaping cutter on the powder surface, and rotating the end face shaping cutter to cut the end face of the powder;
c. when the positioning table of the end face shaping cutter is contacted with the end face of the metal shell, cutting is stopped;
d. pouring out the scraps in the gunpowder product and blowing the scraps by using an air gun;
) Shaping the hole wall, specifically operating as follows:
a. the positioning ring is arranged at one end of the metal shell for end face shaping;
b. inserting a hole wall reshaping cutter into the positioning ring;
c. applying force to the gunpowder product, and simultaneously rotating the hole wall shaping cutter;
d. when the baffle is contacted with the end face of the boss of the positioning ring, cutting is stopped;
e. pouring out the scraps in the gunpowder product and blowing the scraps by using an air gun;
3) the spherical hole bottom shaping method specifically comprises the following operations:
a. the positioning ring is arranged at one end of the metal shell for end face shaping;
b. inserting a spherical hole bottom reshaping cutter into the positioning ring;
c. applying force to the gunpowder product, and simultaneously rotating the spherical hole bottom shaping cutter;
d. when the baffle is contacted with the end face of the boss of the positioning ring, cutting is stopped;
e. and (4) pouring out the scraps in the gunpowder product and blowing the scraps by using an air gun.
An end face shaping cutter for the vacuum casting molding gunpowder product shaping method comprises a cutter body, wherein the cutter body comprises a cutting part and a positioning table; the cutting part comprises a plurality of blade bodies [1], the blade bodies form a cylindrical structure, the front end of each blade body is provided with an end blade, the side surface of each blade body is provided with a side blade, and a chip discharge groove is formed between every two adjacent blade bodies; the cutting part is connected with the positioning table through a cutter neck; the positioning table is provided with a plurality of operating handles.
A pore wall reshaping cutter for the vacuum casting gunpowder product reshaping method comprises a cutter body, a positioning ring and an operation part; the cutter body comprises a cutting part and a positioning part; the cutting part comprises a plurality of blade bodies, the blade bodies form a cylindrical structure, side blades are arranged on the side faces of the blade bodies, and chip discharge grooves are formed between adjacent blade bodies; the cutting part is connected with the positioning part through the cutter neck, the cutting part, the cutter neck and the positioning part are coaxial, and the positioning part is provided with a positioning baffle and an operating part; the positioning part is in clearance fit with the inner hole of the positioning ring, the positioning ring is provided with a positioning spigot used for being matched with the end part of the metal shell, and the positioning spigot of the positioning ring is coaxial with the inner hole; the end surface of the positioning ring, which is back to the metal shell, is provided with a lug boss.
A spherical hole bottom reshaping cutter for the vacuum casting gunpowder product reshaping method comprises a cutter body, a positioning ring and an operation part; the cutter body comprises a cutting part and a positioning part; the cutting part comprises a plurality of blade bodies, the blade bodies are of arc-shaped structures, and chip removal grooves are formed between adjacent blade bodies; the cutting part is connected with the positioning part through the cutter neck, the cutting part, the cutter neck and the positioning part are coaxial, and the positioning part is provided with a positioning baffle and an operating part; the positioning part is in clearance fit with the inner hole of the positioning ring, the positioning ring is provided with a positioning spigot used for being matched with the end part of the metal shell, and the positioning spigot of the positioning ring is coaxial with the inner hole; the end surface of the positioning ring, which is back to the metal shell, is provided with a lug boss.
In the hole wall shaping tool, the limiting section is provided with a pin hole along the diameter direction, the end surface of the limiting part is provided with a handle seat hole, the handle seat hole is communicated with the pin hole, the operating part comprises a handle seat, the handle seat is inserted into the handle seat hole, and the handle seat is connected with the limiting section through a pin; the handle seat is provided with a handle which is perpendicular to the axis of the handle seat.
In the hole wall reshaping cutter, the number of the cutter blade bodies is 4-8, and the cutter body, the positioning ring and the positioning baffle are made of duralumin, brass or stainless steel.
In the spherical hole bottom shaping tool, the limiting section is provided with a pin hole along the diameter direction, the end surface of the limiting part is provided with a handle seat hole, the handle seat hole is communicated with the pin hole, the operating part comprises a handle seat, the handle seat is inserted into the handle seat hole, and the handle seat is connected with the limiting section through a pin; the handle seat is provided with a handle which is perpendicular to the axis of the handle seat.
In the spherical hole bottom reshaping cutter, the number of the cutter blade bodies is 2-4, and the cutter body, the positioning ring and the positioning baffle are made of duralumin, brass or stainless steel.
Compared with the prior art, the invention has the following effects:
the shaping method of the vacuum casting powder product is simple, can efficiently and safely shape the vacuum casting powder product, can cut the surface of the powder product to be shaped flat, can trim the powder product to a smaller depth, and can shape the diameter size of the powder product.
Drawings
Fig. 1 is a flow chart of the vacuum cast molding gunpowder product shaping method of the invention.
Fig. 2 is a schematic structural view of an end face shaping cutter for shaping vacuum cast powder products according to the present invention.
FIG. 3 is a schematic structural view of the inner hole wall shaping tool for shaping vacuum cast powder products according to the present invention.
Fig. 4 is a schematic cutter body diagram of the spherical hole bottom shaping cutter for shaping the vacuum casting gunpowder product.
FIG. 5 is a schematic view of a retaining ring according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figure 1, the shaping method of vacuum casting gunpowder product of the invention comprises a cylindrical metal shell 1, and gunpowder 2 cast in vacuum is arranged in the metal shell 1, and comprises the following steps:
1) end face reshaping
a. Putting the end face shaping cutter into the gunpowder product;
b. pressing the end face shaping cutter on the powder surface, and simultaneously rotating the end face shaping cutter clockwise;
c. when the positioning table is contacted with the end face of the metal shell 1, cutting is stopped;
d. pouring out the scraps in the product, and blowing the scraps by using an air gun;
2) pore wall reshaping
a. The positioning ring is arranged at one end of the metal shell 1 for end face shaping;
a. inserting a hole wall reshaping cutter into the positioning ring;
b. applying force to the gunpowder product, and simultaneously rotating the hole wall shaping cutter clockwise;
c. when the positioning baffle is contacted with the end face of the boss of the positioning ring, cutting is stopped;
d. pouring out the scraps in the product, and blowing the scraps by using an air gun;
3) spherical hole bottom reshaping
a. The positioning ring is arranged at one end of the metal shell for end face shaping;
a. inserting a spherical hole bottom reshaping cutter into the positioning ring;
b. applying force to the gunpowder product, and simultaneously rotating the spherical hole bottom shaping cutter clockwise;
c. when the baffle is contacted with the end face of the boss of the positioning ring, cutting is stopped;
d. the scraps in the product are poured out and blown clean by an air gun.
As shown in fig. 2, the end face shaping tool for the vacuum cast gunpowder product shaping method of the present invention comprises a tool body 3, wherein the tool body 3 comprises a cutting part 31 and a positioning table 32; the cutting part 31 comprises 4-8 blade bodies, the blade bodies form a cylindrical structure, the front end of each blade body is provided with an end blade, the side surface of each blade body is provided with a side blade, and a chip groove is formed between every two adjacent blade bodies; the cutting part 31 is connected with a positioning table 32 through a cutter neck 33; the positioning table 32 is provided with a plurality of operation handles 34.
As shown in fig. 3, the hole wall shaping tool for the vacuum casting gunpowder product shaping method of the present invention comprises a tool body 3, a positioning ring 5 and an operation part 4; the cutter body 3 includes a cutting portion 31 and a positioning portion 35; the cutting part 31 comprises 4-8 blade bodies, the blade bodies form a cylindrical structure, side blades are arranged on the side faces of the blade bodies, and chip removal grooves are formed between adjacent blade bodies. The cutting part 31 is connected with the positioning part 35 through the cutter neck 33, the cutting part 31, the cutter neck 33 and the positioning part 35 are coaxial, and the positioning part 35 is provided with a positioning baffle 37 and the operating part 4. The positioning part 35 is in clearance fit with the inner hole of the positioning ring 5, the positioning ring 5 is provided with a positioning spigot 51 matched with the end part of the metal shell, and the positioning spigot 51 of the positioning ring 5 is coaxial with the inner hole. The end face of the positioning ring 5 facing away from the metal casing is provided with a projection 52. The cutter body 3, the positioning ring 5 and the positioning baffle 37 are made of duralumin, brass or stainless steel.
The positioning part 35 is provided with a pin hole 36 along the diameter direction, the end surface of the positioning part 35 is provided with a handle seat hole, the handle seat hole is communicated with the pin hole, the operating part 4 comprises a handle seat 41, a handle seat 42 is inserted into the handle seat hole, and the handle seat 41 is connected with the limiting section through a pin; the handle seat 41 is provided with a handle 42, and the handle 42 is arranged perpendicular to the axis of the handle seat 41.
As shown in fig. 4, the spherical hole bottom shaping tool for the vacuum casting gunpowder product shaping method of the present invention comprises a tool body 3, a positioning ring 5 and an operation part 4; the cutter body 3 includes a cutting portion 31 and a positioning portion 35; the cutting part 31 comprises 2-4 cutter blade bodies, the cutter blade bodies are of arc-shaped structures, spherical structures can be formed by rotation, the spherical bottom is modified, and chip discharge grooves are formed between adjacent cutter blade bodies. The cutting part 31 is connected with the positioning part 35 through the cutter neck 33, the cutting part 31, the cutter neck 33 and the positioning part 35 are coaxial, and the positioning part 35 is provided with a positioning baffle 37 and the operating part 4. The positioning part 35 is in clearance fit with the inner hole of the positioning ring 5, the positioning ring 5 is provided with a positioning spigot 51 matched with the end part of the metal shell, and the positioning spigot 51 of the positioning ring 5 is coaxial with the inner hole. The end face of the positioning ring 5 facing away from the metal casing is provided with a projection 52. The cutter body 3, the positioning ring 5 and the positioning baffle 37 are made of duralumin, brass or stainless steel.
The positioning part 35 is provided with a pin hole 36 along the diameter direction, the end surface of the positioning part 35 is provided with a handle seat hole, the handle seat hole is communicated with the pin hole, the operating part 4 comprises a handle seat 41, a handle seat 42 is inserted into the handle seat hole, and the handle seat 41 is connected with the limiting section through a pin; the handle seat 41 is provided with a handle 42, and the handle 42 is arranged perpendicular to the axis of the handle seat 41.
Claims (8)
1. A shaping method of vacuum casting gunpowder product comprises a cylindrical metal shell, wherein vacuum casting gunpowder is arranged in the metal shell, and the shaping method comprises the following steps:
1) end face reshaping, which specifically comprises the following operations:
putting the end face shaping cutter into the gunpowder product;
pressing the cutting part of the end face shaping cutter on the powder surface, and rotating the end face shaping cutter to cut the end face of the powder;
when the positioning table of the end face shaping cutter is contacted with the end face of the metal shell, cutting is stopped;
pouring out the scraps in the gunpowder product and blowing the scraps by using an air gun;
2) shaping the hole wall, specifically operating as follows:
the positioning ring is arranged at one end of the metal shell for end face shaping;
inserting a hole wall reshaping cutter into the positioning ring;
applying force to the gunpowder product, and simultaneously rotating the hole wall shaping cutter;
when the baffle is contacted with the end face of the boss of the positioning ring, cutting is stopped;
pouring out the scraps in the gunpowder product and blowing the scraps by using an air gun;
3) the spherical hole bottom shaping method specifically comprises the following operations:
the positioning ring is arranged at one end of the metal shell for end face shaping;
inserting a spherical hole bottom reshaping cutter into the positioning ring;
applying force to the gunpowder product, and simultaneously rotating the spherical hole bottom shaping cutter;
when the baffle is contacted with the end face of the boss of the positioning ring, cutting is stopped;
and (4) pouring out the scraps in the gunpowder product and blowing the scraps by using an air gun.
2. An end face shaping cutter for a vacuum casting gunpowder product shaping method as defined in claim 1, which is characterized by comprising a cutter body, wherein the cutter body comprises a cutting part and a positioning table; the cutting part comprises a plurality of blade bodies, the blade bodies form a cylindrical structure, the front end of each blade body is provided with an end blade, the side surface of each blade body is provided with a side blade, and a chip groove is formed between every two adjacent blade bodies; the cutting part is connected with the positioning table through a cutter neck; the positioning table is provided with a plurality of operating handles.
3. The hole wall shaping tool for the vacuum casting gunpowder product shaping method according to claim 1, which is characterized by comprising a tool body, a positioning ring and an operating part; the cutter body comprises a cutting part and a positioning part; the cutting part comprises a plurality of blade bodies, the blade bodies form a cylindrical structure, side blades are arranged on the side faces of the blade bodies, and chip discharge grooves are formed between adjacent blade bodies; the cutting part is connected with the positioning part through the cutter neck, the cutting part, the cutter neck and the positioning part are coaxial, and the positioning part is provided with a positioning baffle and an operating part; the positioning part is in clearance fit with the inner hole of the positioning ring, the positioning ring is provided with a positioning spigot used for being matched with the end part of the metal shell, and the positioning spigot of the positioning ring is coaxial with the inner hole; the end surface of the positioning ring, which is back to the metal shell, is provided with a lug boss.
4. A spherical hole bottom reshaping cutter for the vacuum casting gunpowder product reshaping method is characterized by comprising a cutter body, a positioning ring and an operating part; the cutter body comprises a cutting part and a positioning part; the cutting part comprises a plurality of blade bodies, the blade bodies are of arc-shaped structures, and chip removal grooves are formed between adjacent blade bodies; the cutting part is connected with the positioning part through the cutter neck, the cutting part, the cutter neck and the positioning part are coaxial, and the positioning part is provided with a positioning baffle and an operating part; the positioning part is in clearance fit with the inner hole of the positioning ring, the positioning ring is provided with a positioning spigot used for being matched with the end part of the metal shell, and the positioning spigot of the positioning ring is coaxial with the inner hole; the end surface of the positioning ring, which is back to the metal shell, is provided with a lug boss.
5. The hole wall shaping cutter according to claim 3, wherein the limiting section is provided with a pin hole along the diameter direction, the end surface of the limiting part is provided with a handle seat hole which is communicated with the pin hole, the operating part comprises a handle seat, the handle seat is inserted into the handle seat hole, and the handle seat is connected with the limiting section through a pin; the handle seat is provided with a handle which is perpendicular to the axis of the handle seat.
6. The hole wall shaping tool according to claim 3, wherein the number of the blade bodies is 4-8, and the tool body, the positioning ring and the positioning baffle are made of duralumin, brass or stainless steel.
7. The spherical hole bottom shaping cutter according to claim 4, wherein the limiting section is provided with a pin hole along the diameter direction, the end surface of the limiting part is provided with a handle seat hole which is communicated with the pin hole, the operating part comprises a handle seat, the handle seat is inserted into the handle seat hole, and the handle seat is connected with the limiting section through a pin; the handle seat is provided with a handle which is perpendicular to the axis of the handle seat.
8. The spherical hole bottom shaping tool according to claim 4, wherein the number of the blade bodies is 2-4, and the tool body, the positioning ring and the positioning baffle are made of duralumin, brass or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911307658.6A CN110981647A (en) | 2019-12-18 | 2019-12-18 | Shaping method and cutter for vacuum casting gunpowder product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911307658.6A CN110981647A (en) | 2019-12-18 | 2019-12-18 | Shaping method and cutter for vacuum casting gunpowder product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110981647A true CN110981647A (en) | 2020-04-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911307658.6A Withdrawn CN110981647A (en) | 2019-12-18 | 2019-12-18 | Shaping method and cutter for vacuum casting gunpowder product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110981647A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790641A (en) * | 2021-09-30 | 2021-12-14 | 重庆航天工业有限公司 | Projectile body powder face trimming device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10001887B4 (en) * | 2000-01-19 | 2007-03-15 | Rheinmetall Waffe Munition Gmbh | Device for cutting thin-walled sleeve parts |
| CN202239963U (en) * | 2011-10-24 | 2012-05-30 | 潍柴动力股份有限公司 | Cutter for repairing machine body spigot |
| CN205466532U (en) * | 2015-08-12 | 2016-08-17 | 内蒙古航天红峡化工有限公司 | Solid propellant powder column afterbody awl hole machining tool |
| CN105750599B (en) * | 2016-04-04 | 2018-10-23 | 上海大学 | A kind of compound tool of monoblock type processing step hole hole wall and bottom hole |
| CN208584003U (en) * | 2018-08-30 | 2019-03-08 | 重庆前卫科技集团有限公司 | A kind of ring type deep trough process tool |
-
2019
- 2019-12-18 CN CN201911307658.6A patent/CN110981647A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10001887B4 (en) * | 2000-01-19 | 2007-03-15 | Rheinmetall Waffe Munition Gmbh | Device for cutting thin-walled sleeve parts |
| CN202239963U (en) * | 2011-10-24 | 2012-05-30 | 潍柴动力股份有限公司 | Cutter for repairing machine body spigot |
| CN205466532U (en) * | 2015-08-12 | 2016-08-17 | 内蒙古航天红峡化工有限公司 | Solid propellant powder column afterbody awl hole machining tool |
| CN105750599B (en) * | 2016-04-04 | 2018-10-23 | 上海大学 | A kind of compound tool of monoblock type processing step hole hole wall and bottom hole |
| CN208584003U (en) * | 2018-08-30 | 2019-03-08 | 重庆前卫科技集团有限公司 | A kind of ring type deep trough process tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790641A (en) * | 2021-09-30 | 2021-12-14 | 重庆航天工业有限公司 | Projectile body powder face trimming device |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200410 |
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| WW01 | Invention patent application withdrawn after publication |