阅读说明：本技术 单极孔燃烧室壳体缠绕工装 (Single-pole-hole combustion chamber shell winding tool ) 是由 张鹏飞 胡伟 张敏 陈孝鹏 于 2020-12-29 设计创作，主要内容包括：本发明涉及固体火箭发动机复合材料壳体领域,具体涉及单极孔燃烧室壳体缠绕工装。包括：缠绕芯轴、夹紧盘、锥帽、卡扣、螺母及带金属接头的砂芯模,所述缠绕芯轴通过直径变化形成轴肩,在细直径的轴头处安装锥帽、卡扣及螺母实现轴向定位；所述锥帽,内孔与缠绕芯轴配合,外方与砂芯模内孔配合；所述卡扣,外边与锥帽方形内孔配合,内孔与螺母外边配合；所述螺母,通过螺纹与缠绕芯轴细轴连接；所述加紧盘在缠绕侧沿缠绕芯轴螺纹轴向移动,与金属接头贴合；所述砂芯模内孔与缠绕芯轴尺寸匹配,缠绕侧金属接头连接,另一侧开孔,便于锥帽卡扣螺母安装。本发明使各零件不独立环向转动,实现了砂芯模与缠绕芯轴的环向固定。(The invention relates to the field of composite material shells of solid rocket engines, in particular to a winding tool for a single-pole-hole combustion chamber shell. The method comprises the following steps: the winding mandrel is provided with a shaft shoulder through diameter change, and the cone cap, the buckle and the nut are arranged at a shaft head with a small diameter to realize axial positioning; the inner hole of the conical cap is matched with the winding mandrel, and the outer part of the conical cap is matched with the inner hole of the sand core die; the outer edge of the fastener is matched with the square inner hole of the conical cap, and the inner hole is matched with the outer edge of the nut; the nut is connected with the winding mandrel thin shaft through threads; the tightening disc axially moves along the winding mandrel thread on the winding side and is attached to the metal joint; the sand core mold inner hole is matched with the winding core mold in size, the metal joint on the winding side is connected, and the other side is provided with a hole, so that the installation of the conical cap buckle nut is facilitated. The invention ensures that each part does not rotate in the annular direction independently, and realizes the annular fixation of the sand core mould and the winding mandrel.)

1. Unipolar hole combustion chamber casing winding frock, its characterized in that includes:

the winding mandrel forms a shaft shoulder through diameter change, and a taper cap, a buckle and a nut are arranged at a shaft head with a thin diameter to realize axial positioning;

the inner hole of the conical cap is matched with the winding mandrel, and the outer side of the conical cap is matched with the inner hole of the sand core die;

the outer ring of the buckle is matched with an inner hole of the conical cap, the inner hole is matched with the outer ring of the nut, and the nut is connected with the winding mandrel thin shaft through threads;

the tightening disc moves axially along the winding mandrel thread on the winding side and is attached to the metal joint so as to fasten the sand core mold;

the sand core mold inner hole is matched with the winding core mold in size, the metal joint on the winding side is connected, and the other side is provided with a hole, so that the installation of the conical cap buckle nut is facilitated.

2. The single-pole-hole combustion chamber shell winding tool of claim 1, characterized in that: the above-mentioned

The outer ring of the cone cap can be quadrilateral, pentagonal or hexagonal.

3. The single-pole-hole combustion chamber shell winding tool of claim 1, characterized in that: the above-mentioned

The inner hole of the cone cap can be quadrilateral, pentagonal or hexagonal.

4. The single-pole-hole combustion chamber shell winding tool of claim 1, characterized in that: the winding mandrel is disengaged from the nut by a counter torque.

5. The single-pole-hole combustion chamber shell winding tool of claim 1, characterized in that: the maximum diameter of the winding mandrel is the same as the outer diameter of the conical cap.

Technical Field

The invention relates to the field of composite material shells of solid rocket engines, in particular to a winding tool for a single-pole-hole combustion chamber shell.

Background

The inner container of the single-pole hole container such as the liquid hydrogen storage tank and the gas cylinder is integrated with the joint and is kept inside the winding shell, and only a winding mandrel needs to be installed on the joint during winding, so that the problem of demoulding of the inner container is not involved.

The core mold before the composite material shell of the combustion chamber of the single-pole-hole solid rocket engine is wound also comprises a metal connector, but the metal connector and the core mold (a sand core mold, a framework core mold and the like) are not of an integrated structure and cannot transmit rolling torque. The mandrel must be threaded through the joint and the central hole of the mandrel to support and position the joint and the mandrel. Therefore, the design method of the core mold and the core shaft of the container with single pole hole such as the liquid hydrogen storage tank and the gas cylinder cannot be adopted.

The winding mandrel of the shell of the unipolar hole combustion chamber is matched and fixed with the sand mandrel when being wound, and the winding mandrel is unlocked and separated from the sand mandrel when being demoulded. And because unipolar hole combustion chamber casing one end opening, one end seals, can't follow the blind end operation during the drawing of patterns, can only begin to operate through the winding dabber of opening side, has certain technical difficulty.

Disclosure of Invention

Technical problem to be solved by the invention

The invention provides a single-pole-hole combustion chamber shell winding tool, which is used for realizing the assembly of a mandrel and a sand core die, and the clamping and fixing of a sand core are realized through a shaft shoulder and a conical cap formed by the diameter change of the mandrel, so that the winding mandrel and the sand core die are integrated into a whole, and the winding mandrel and the sand core die are continuously clamped during winding; meanwhile, the reverse design of the nut screwing direction and the core mold rolling direction realizes the locking and unlocking of the core shaft and the nut, thereby realizing smooth demolding;

adopts the technical proposal

Unipolar hole combustion chamber casing winding frock includes:

the winding mandrel forms a shaft shoulder through diameter change, and a taper cap, a buckle and a nut are arranged at a shaft head with a thin diameter to realize axial positioning;

the inner hole of the conical cap is matched with the winding mandrel, and the outer side of the conical cap is matched with the inner hole of the sand core die;

the outer ring of the buckle is matched with an inner hole of the conical cap, the inner hole is matched with the outer ring of the nut, and the nut is connected with the winding mandrel thin shaft through threads;

the tightening disc moves axially along the winding mandrel thread on the winding side and is attached to the metal joint so as to fasten the sand core mold;

the sand core mold inner hole is matched with the winding core mold in size, the metal joint on the winding side is connected, and the other side is provided with a hole, so that the installation of the conical cap buckle nut is facilitated.

Further, the outer ring of the cone cap can be quadrilateral, pentagonal or hexagonal.

Further, the inner hole of the cone cap can be a quadrangle, a pentagon or a hexagon.

Further, the winding mandrel is disengaged from the nut by a counter torque.

Further, the maximum diameter of the winding mandrel is the same as the outer diameter of the cone cap.

Advantageous effects

The tool is adopted for winding, so that each part cannot rotate in the annular direction independently, and the annular fixing of the sand core die and the winding mandrel is realized; the nut thread screwing direction is opposite to the winding and rolling direction of the mandrel, the nut is tightened more and more during winding, the sand core mold and the winding mandrel are axially limited by combining the diameter change of the winding mandrel, and the axial fixation of the sand core mold and the winding mandrel is realized.

Drawings

FIG. 1: a schematic diagram of a winding tool of a single-pole-hole combustion chamber shell;

FIG. 2: schematic diagram of sand core mold:

FIG. 3: a schematic view of a winding mandrel;

FIG. 4: a schematic view of a cone cap;

FIG. 5: a snap-fit schematic view;

FIG. 6: a clamping disk schematic;

wherein: 1. the sand core mold comprises a winding core shaft, 2 parts of a clamping disc, 3 parts of a conical cap, 4 parts of a buckle, 5 parts of a nut and 6 parts of a sand core mold.

Detailed Description

The winding mandrel mainly adopts the idea that a winding mandrel forms a shaft shoulder through diameter change, a taper cap and a nut are arranged at a shaft head with a small diameter, and axial limiting is realized through the shaft shoulder, a shield and the nut. The shielding adopts a polygonal structure, the inner hole of the sand core mold also adopts a polygonal structure, and the annular positioning can be realized by the cooperation of the two structures. The nut with shelter from through setting up middle transition part buckle, with the nut with shelter from fixed, the reverse design of direction and winding direction is screwed up to rethread nut, the nut will be screwed up more with the dabber when the winding more tightly. The sand core mold, the shielding part, the nut and the core shaft can be mutually fixed and locked by the method. When demoulding, the nut can be loosened by only reversely rotating the winding mandrel, and then the mandrel is pulled out, so that smooth demoulding is realized.

The invention is further described with reference to the following figures and specific embodiments:

the winding tool for the single-pole-hole combustion chamber shell is shown in figure 1:

unipolar hole combustion chamber casing winding frock includes: winding frock 1, clamping disk 2, taper cap 3, buckle 4, nut 5 and psammitolite mould 6.

The sand core mold and the metal joint are installed on a winding tool, one end of the winding tool is a clamping end of a winding machine, and the sand core mold is coated with a heat insulation layer and wound with a carbon fiber layer as shown in figure 3. The polygonal inner hole d of the sand core mould has the same shape as the conical cap. And inner holes phi a and phi b of the sand core mold are respectively matched and installed with the winding mandrels Ma and Mb, and the metal joint is installed on the winding mandrel from the other end of the winding mandrel through the inner hole and is attached to one end face of the sand core mold.

The outer diameters of all parts are smaller than the diameter of the inner hole of the metal joint. The winding mandrel is of a reducing design, Ma and Mb, and the screwing direction of the threads of the small-diameter shaft head and the nut is opposite to the winding and rolling direction of the winding mandrel. The shape d of the conical cap can be quadrilateral, pentagonal and hexagonal, the design of the inner side c of the conical cap can be quadrilateral, pentagonal and hexagonal, the shape of the inner hole of the buckle is the same as that of a standard nut, and the shape of the buckle is the same as that of the inner side of the conical cap.

As shown in fig. 4, an inner hole phi b of the cone cap is matched with the winding mandrel Mb, and the outer side d of the cone cap is matched with a square inner hole d of the sand core die; the standard nut is connected with the winding mandrel Mb through threads and can axially move to the joint of the nut, the conical cap and the sand core mold.

As shown in FIG. 5, the polygonal inner snap edge mates with the outer edge of a standard nut and the square outer snap edge c mates with the square inner cone cap edge c.

As shown in fig. 6, the clamping disk threads Ma are fitted with the winding mandrel Ma and are axially movable into engagement with the metal fitting.

The sand core mold, the conical cap, the buckle and the nut are connected into a whole, so that each part cannot rotate in an independent annular direction, and the annular fixing of the sand core mold and the winding mandrel is realized; the nut thread screwing direction is opposite to the winding and rolling direction of the mandrel, the nut is tightened more and more during winding, the sand core mold and the winding mandrel are axially limited by combining the diameter change of the winding mandrel, and the axial fixation of the sand core mold and the winding mandrel is realized.

Mounting a conical cap on a winding mandrel, matching an inner hole phi b of the conical cap with the winding mandrel Mb, matching an outer side d of the conical cap with a square inner hole d of a sand core die,

installing a standard nut on the winding mandrel, connecting the standard nut with the winding mandrel Mb through threads, and screwing the nut until the nut and the cone cap are attached and fastened with the sand core mold;

matching the polygonal inner hole of the buckle with the outer edge of the standard nut, and matching the square outer edge c of the buckle with the square inner hole c of the cone cap;

mounting a clamping disc, wherein the threads Ma of the clamping disc are matched with the winding mandrel Ma, and the clamping disc is axially moved to be attached to the metal joint and screwed down;

and (3) filling the square hole in the square inner hole of the sand core die with automobile putty filler until the square hole is in smooth transition with the peripheral profile of the hole, and covering the spindle head Mb, the conical cap, the nut and the buckle of the mandrel.

And coating heat insulation layers on the metal joint, the outer surface of the sand core die and the side of the electrodeless hole, and then winding and curing the fibers. During winding, one end of a winding mandrel Ma is clockwise rotated by the winding machine in a clamping mode, a forward torque is provided for the mandrel, the winding tension provides a counterclockwise reverse torque for the nut through the heat insulation layer, the sand core, the conical cap and the buckle, and the mandrel and the nut are screwed more and more at the moment and cannot loosen.

When demoulding, firstly withdrawing the clamping disc, then fixing the shell, and rotating the mandrel anticlockwise; because the casing passes through heat insulation layer, psammitolite, awl cap, buckle and transmits moment for the nut, will separate with the nut when the dabber is rotatory. And after the mandrel is pulled out, the sand core is dissolved by hot water and taken out together with the cone cap, the buckle and the nut.

The maximum diameter a of the winding mandrel and the outer diameter a of the conical cap are less than or equal to the diameter of the inner hole of the metal joint;

the diameter a of the winding mandrel is larger than the diameter b of the winding mandrel;

inner holes phi a and phi b of the sand core mold are respectively matched with the winding core shafts Ma and Mb;

the diameter Ma of the winding mandrel thread is matched with the diameter Ma of the clamping disc thread;

the conical cap phi b is matched with the winding mandrel Mb;

the conical cap d is matched with the square hole d in the sand core die;

the polygonal inner hole of the buckle is matched with the outer edge of the standard nut;

the buckle c is matched with the inner square c of the cone cap.