CN110976926A - Clamping tool for metal shell of solid engine - Google Patents
Clamping tool for metal shell of solid engine Download PDFInfo
- Publication number
- CN110976926A CN110976926A CN201911053392.7A CN201911053392A CN110976926A CN 110976926 A CN110976926 A CN 110976926A CN 201911053392 A CN201911053392 A CN 201911053392A CN 110976926 A CN110976926 A CN 110976926A
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- China
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- ring
- pressing block
- metal shell
- connecting rings
- rings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B25/00—Accessories or auxiliary equipment for turning-machines
Abstract
A clamping tool for a metal shell of a solid engine comprises a circular ring, a spring washer, two connecting rings, a pressing block and a compression screw. Wherein, two connecting rings are respectively fixed on two end faces of the circular ring. The plurality of compression screws are uniformly distributed on the circumferential surface of each connecting ring and are respectively arranged in the threaded through holes on each connecting ring. The inner ends of the compression screws are respectively provided with a pressing block; the end face of each compact is provided with a brass shim formed by overlay welding. The inner diameter of the ring is larger than the outer diameter of the workpiece. Grooves are formed in the centers of the upper surface and the lower surface of the circular ring and are used for positioning the connecting rings; a plurality of threaded holes according to the connecting ring are distributed at the bottom of the groove. Each groove is coaxial with the ring. The machining accuracy of the outer circumferential surface of the ring was 0.05 mm. The invention reduces the consumption of the tool, reduces the manufacturing cost and is more convenient to assemble.
Description
Technical Field
The invention relates to the field of machining, in particular to a clamping tool for machining a metal shell of a solid engine
Background
The solid rocket engine has the characteristics of simple structure, emergency launching and easy realization of high thrust, and is used for providing power for strategic missiles, tactical missiles and carrier rockets. As the metal shell of the solid rocket engine belongs to a thin-wall part, the metal shell has poor rigidity, weak strength and easy deformation, and in order to improve the processing precision of products and ensure the product quality, a process ring is required to be used for auxiliary clamping in the processing and manufacturing process. In the turning process of the metal shell, the process ring is used for clamping the excircle of the shell part, when the metal shell is used at each time, the excircle of the process ring needs to be turned and then the shell to be machined is aligned and the machining reference is converted, along with the increase of the use times, the excircle part of the process ring is consumed completely, and the process ring can only be scrapped after being incapable of being used continuously. Because the types of processed products are more, in actual production, tools with different types and specifications are generally required to be designed and manufactured for the production of the same type of products with different types, the production period of the tools is long, the development and production progress of the type products is greatly restricted, and the process ring is scrapped after being used for a plurality of times, so that the waste of the great development cost is caused. In the patent of publication No. CN201493693U, a novel adjustable clamp for processing thin-walled shell parts is disclosed, the clamp has a lantern ring, a plurality of radial through holes are distributed on the lantern ring, each through hole is penetrated with an adjustable bolt and used for clamping of thin-walled shells, and the process ring of the structure is easy to clamp and hurt the outer surface of the processed parts due to the fact that the screw head directly contacts the surface of the shell. In the patent of publication No. CN201710824803.2, a combined tool for clamping a thin-wall shell is disclosed, the structure of the tool comprises a clamping rib, a process ring, a compression screw and a plurality of ejector blocks, a plurality of radial threaded holes are arranged on the clamping rib, and an adjustable screw and a pressing block are penetrated through each threaded hole. However, because the process ring is sleeved on the clamping body and is tightly assembled, the process ring is troublesome to assemble and use, the process ring is firstly sleeved on the clamping rib in a hot-assembling mode, and then the process ring is welded on the clamping rib.
Disclosure of Invention
In order to overcome the defects of complex process and troublesome assembly and use in the prior art, the invention provides a clamping tool for a metal shell of a solid engine.
The invention comprises a circular ring, a spring washer, two connecting rings, a pressing block and a pressing screw. The two connecting rings are respectively positioned on two end faces of the circular ring and are fixed through connecting screws. The plurality of compression screws are uniformly distributed on the circumferential surface of each connecting ring and are respectively arranged in the threaded through holes on each connecting ring. The inner ends of the compression screws are respectively provided with a pressing block; the end face of each of the compacts is provided with a brass shim formed by build-up welding.
The inner diameter of the circular ring is larger than the outer diameter of the workpiece. Grooves are formed in the centers of the upper surface and the lower surface of the circular ring and are used for positioning the connecting rings; and a plurality of threaded holes according to the connecting ring are distributed at the bottom of the groove. Each groove is coaxial with the ring. The machining accuracy of the outer circumferential surface of the ring was 0.05 mm.
The inner diameter of the two connecting rings is the same as that of the circular ring. The cross sections of the two connecting rings are L-shaped. Threaded holes for fixing the connecting rings and the circular rings are distributed on the horizontal plates of the connecting rings; and a plurality of mounting holes for the compression screws are uniformly distributed on the vertical plates of the connecting rings. The center line of the threaded hole on the horizontal plate is perpendicular to the center line of the mounting hole on the vertical plate in space.
The thread surface of the compression screw is divided into two sections, one section is matched with the mounting hole in the vertical plate of the connecting ring and is positioned in the middle of the compression screw; the other section is matched with the pressing block and is positioned at the end head of the compression screw.
The cross section of the pressing block is C-shaped. The inner surface of the opening of the pressing block is a thread surface matched with the compression screw. The outer end face of the closed end of the pressing block is provided with a cushion layer in a surfacing mode, and the cushion layer is used for preventing the surface of a workpiece from being damaged when the workpiece is clamped; the thickness of the cushion layer is 0.5-1.0 mm.
When the pressing block is used, the circular ring and the two connecting bodies are firmly connected through the hexagonal screws, the pressing screws are screwed into the lateral screw holes of the connecting bodies, and the pressing block is installed on the pressing screws. And mounting the process ring on the excircle of the processed shell part, and adjusting the compression screw to ensure that the pressing block at the end of the compression screw is tightly fixed after being attached to the surface of the excircle of the shell.
After the processing ring is clamped on the metal shell and before the processing ring is used, the roundness requirement of the processing ring is high in order to serve as a processing reference of a product, so that the circular ring part of the processing ring needs to be turned and adjusted by 0.2-0.5 mm before the processing ring is used, and the roundness of the processing ring is guaranteed. Thus, the ring is effectively a consumable part, and for a monolithic process ring, when the ring portion is depleted, the entire process ring is scrapped.
The invention is composed of the circular ring and the connecting ring, thereby reducing the consumption of the tool and the manufacturing cost. The middle of the circular ring and the connecting ring are connected through screws, so that the assembly is more convenient. When the clamping piece is assembled, the clamping and alignment of shells with different diameters can be realized by adjusting the compression screw and the pressing block. The cushion layer is added on the matching surface of the pressing block and the workpiece, so that the surface of the processed metal shell workpiece can not be damaged by clamping.
Drawings
FIG. 1 is a schematic view of an attachment ring configuration; wherein fig. 1a is a front view and fig. 1b is a cross-sectional view P-P in fig. 1 a.
Fig. 2 is a schematic view of the structure of the ring.
FIG. 3 is a schematic view of the structure of the compact.
Fig. 4 is a schematic view of a compression screw structure.
FIG. 5 is a schematic diagram of a process ring.
Fig. 6 is a cross-sectional view P-P in fig. 5.
FIG. 7 is a schematic view of the process ring in cooperation with a workpiece.
FIG. 8 is an enlarged partial view of the engagement of the process ring with the workpiece.
In the figure: 1. a circular ring; 3. a connecting screw; 4. a connecting ring; 5. briquetting; 6. a compression screw; 7. a workpiece; 8. and (5) cushion coating.
Detailed Description
Example 1
The embodiment is a combined process ring for clamping a metal shell of a solid engine, comprising: the device comprises a circular ring 1, a spring washer 2, two connecting rings 4, a pressing block 5 and a compression screw 6. Wherein, the two connecting rings 4 are respectively positioned on two end surfaces of the circular ring and are fixed by the connecting screws 3. A plurality of compression screws 6 are uniformly distributed on the circumferential surface of each connecting ring and are respectively arranged in the threaded through holes on each connecting ring. The inner ends of the compression screws are respectively provided with a pressing block 5; a brass shim 8 formed by overlay welding is provided on the end face of each of the compacts.
The ring 1 is made of cast iron, and the inner diameter of the ring is larger than the outer diameter of the workpiece 7. Grooves are formed in the centers of the upper surface and the lower surface of the circular ring and are used for positioning the connecting rings; and a plurality of threaded holes according to the connecting ring are distributed at the bottom of the groove. Each groove is coaxial with the ring. The machining accuracy of the outer circumferential surface of the ring was 0.05 mm.
The inner diameter of the two connecting rings is the same as that of the circular ring. The cross sections of the two connecting rings are L-shaped. Threaded holes for fixing the connecting rings and the circular rings are distributed on the horizontal plates of the connecting rings; and a plurality of mounting holes of the compression screws 6 are uniformly distributed on the vertical plates of the connecting rings. The center line of the threaded hole on the horizontal plate is perpendicular to the center line of the mounting hole on the vertical plate in space.
The thread surface of the compression screw 6 is divided into two sections, one section is matched with the mounting hole in the vertical plate of the connecting ring and is positioned in the middle of the compression screw; the other section is matched with the pressing block 5 and is positioned at the end head of the compression screw.
The cross section of the pressing block 5 is C-shaped. The inner surface of the opening of the pressing block is a thread surface matched with the compression screw. The outer end face of the closed end of the pressing block is provided with a cushion layer 8 in a surfacing mode, and the cushion layer is used for preventing the surface of a workpiece from being damaged when the workpiece is clamped; the thickness of the cushion layer is 0.5-1.0 mm.
When assembling, the connecting rings 4 are arranged in the grooves on the upper surface and the lower surface of the circular ring 1, and in clearance fit, the two connecting rings 4 are respectively assembled with the circular ring through the connecting screws 3.
A plurality of radial compression screw mounting holes are uniformly distributed on the circumferential surfaces of the two connecting rings 4, the compression screws 6 are respectively arranged in the threaded holes, and pressing blocks 5 are respectively arranged at the ends of the compression screws. The number of the compression screw mounting holes is determined according to the diameter of the workpiece, and is 12 in the embodiment.
The end face of one end of the pressing block 5 is attached to the surface of the workpiece. The end face is provided with a cushion layer formed by overlaying brass to prevent the outer circumferential surface of the workpiece from being damaged, and the other end is provided with a threaded hole for assembling with a compression screw.
The material of the ring 1 is cast iron HT250, the material of the compression screw 6 is steel 30CrMnSiA, the heat treatment hardness is HRC 33-38, and the material of the connecting ring 4 and the material of the pressing block 5 are 45# steel and the heat treatment hardness is HRC 33-38.
The using method comprises the following steps: during clamping, the two process rings are required to be matched for use, the two assembled process rings are respectively sleeved on the surface of the processed metal shell, the end face of the processed shell is used as a reference for the positions of the two process rings, and the distance is 300-400 mm. And adjusting the length of the compression screw according to different diameters of the processed shell until the end face of the pressing block is tightly attached to the outer circle of the metal shell. And detecting the jumping amount of the excircle of the two process rings on a machine tool, adjusting the tightness of the compression screws to align the process rings, and then performing turning processing. The embodiment realizes clamping and alignment of the metal shell and converts the machining reference to the two process rings.
Claims (6)
1. A clamping tool for a metal shell of a solid engine is characterized by comprising a circular ring, a spring washer, two connecting rings, a pressing block and a pressing screw; the two connecting rings are respectively positioned on two end surfaces of the circular ring and are fixed through connecting screws; a plurality of compression screws are uniformly distributed on the circumferential surface of each connecting ring and are respectively arranged in the threaded through holes on each connecting ring; the inner ends of the compression screws are respectively provided with a pressing block; the end face of each of the compacts is provided with a brass shim formed by build-up welding.
2. The clamping tool for the metal shell of the solid engine according to claim 1, wherein the inner diameter of the circular ring is larger than the outer diameter of the workpiece; grooves are formed in the centers of the upper surface and the lower surface of the circular ring and are used for positioning the connecting rings; a plurality of threaded holes are distributed at the bottom of the groove according to the connecting ring; each groove is coaxial with the ring.
3. The clamping tool for the metal shell of the solid engine according to claim 1, wherein the two connecting rings have the same inner diameter as that of the circular ring; the cross sections of the two connecting rings are L-shaped; threaded holes for fixing the connecting rings and the circular rings are distributed on the horizontal plates of the connecting rings; a plurality of mounting holes for the compression screws are uniformly distributed on the vertical plate of each connecting ring; the center line of the threaded hole on the horizontal plate is perpendicular to the center line of the mounting hole on the vertical plate in space.
4. The clamping tool for the metal shell of the solid engine according to claim 1, wherein the thread surface of the compression screw is divided into two sections, one section is matched with the mounting hole in the vertical plate of the connecting ring and is positioned in the middle of the compression screw; the other section is matched with the pressing block and is positioned at the end head of the compression screw.
5. The clamping tool for the metal shell of the solid engine according to claim 1, wherein the cross section of the pressing block is C-shaped; the inner surface of the opening of the pressing block is a thread surface matched with the compression screw; the outer end face of the closed end of the pressing block is provided with a cushion layer in a surfacing mode, and the cushion layer is used for preventing the surface of a workpiece from being damaged when the workpiece is clamped; the thickness of the cushion layer is 0.5-1.0 mm.
6. The fixture for clamping the metal shell of the solid engine according to claim 1, wherein the machining precision of the outer circumferential surface of the ring is 0.05 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911053392.7A CN110976926A (en) | 2019-10-31 | 2019-10-31 | Clamping tool for metal shell of solid engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911053392.7A CN110976926A (en) | 2019-10-31 | 2019-10-31 | Clamping tool for metal shell of solid engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110976926A true CN110976926A (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911053392.7A Pending CN110976926A (en) | 2019-10-31 | 2019-10-31 | Clamping tool for metal shell of solid engine |
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| Country | Link |
|---|---|
| CN (1) | CN110976926A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2141954A1 (en) * | 1971-06-15 | 1973-01-26 | Jauch Kurt | |
| FR2905621A1 (en) * | 2006-09-11 | 2008-03-14 | Renault Sas | Jaw for e.g. crankshaft bearing abrasive machining device, has inserts moving radially with respect to interface, and fluid supply unit provided commonly for micro-jacks and connected to orifice, where unit is housed in structure of jaw |
| CN101602171A (en) * | 2009-07-10 | 2009-12-16 | 安徽莱恩电泵有限公司 | A kind of novel adjustable clamp that is used for machining parts of thin-wall casing |
| CN101856791A (en) * | 2010-06-02 | 2010-10-13 | 南通弘峰机电有限公司 | Adjustable internal mold annular support of clamping device for inner circle of wind power generator case |
| CN102500761A (en) * | 2011-11-02 | 2012-06-20 | 沈阳飞机工业（集团）有限公司 | Machining process for slender shaft type part of unmachined outer circle |
| CN202684563U (en) * | 2012-07-17 | 2013-01-23 | 中国神华能源股份有限公司 | Eccentric clamping device and location system with eccentric clamping device |
| CN205572228U (en) * | 2016-03-07 | 2016-09-14 | 成都高峰石油机械有限公司 | Pipeline clamping device |
| CN107414519A (en) * | 2017-09-14 | 2017-12-01 | 西安航天动力机械厂 | A kind of Combined fixture for clamping thin-wall case |
| CN207387084U (en) * | 2017-09-25 | 2018-05-22 | 上海宝冶工程技术有限公司 | A kind of thin-wall tube inner bearing type frock |
-
2019
- 2019-10-31 CN CN201911053392.7A patent/CN110976926A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2141954A1 (en) * | 1971-06-15 | 1973-01-26 | Jauch Kurt | |
| FR2905621A1 (en) * | 2006-09-11 | 2008-03-14 | Renault Sas | Jaw for e.g. crankshaft bearing abrasive machining device, has inserts moving radially with respect to interface, and fluid supply unit provided commonly for micro-jacks and connected to orifice, where unit is housed in structure of jaw |
| CN101602171A (en) * | 2009-07-10 | 2009-12-16 | 安徽莱恩电泵有限公司 | A kind of novel adjustable clamp that is used for machining parts of thin-wall casing |
| CN101856791A (en) * | 2010-06-02 | 2010-10-13 | 南通弘峰机电有限公司 | Adjustable internal mold annular support of clamping device for inner circle of wind power generator case |
| CN102500761A (en) * | 2011-11-02 | 2012-06-20 | 沈阳飞机工业（集团）有限公司 | Machining process for slender shaft type part of unmachined outer circle |
| CN202684563U (en) * | 2012-07-17 | 2013-01-23 | 中国神华能源股份有限公司 | Eccentric clamping device and location system with eccentric clamping device |
| CN205572228U (en) * | 2016-03-07 | 2016-09-14 | 成都高峰石油机械有限公司 | Pipeline clamping device |
| CN107414519A (en) * | 2017-09-14 | 2017-12-01 | 西安航天动力机械厂 | A kind of Combined fixture for clamping thin-wall case |
| CN207387084U (en) * | 2017-09-25 | 2018-05-22 | 上海宝冶工程技术有限公司 | A kind of thin-wall tube inner bearing type frock |
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Application publication date: 20200410 |