A positioning and machining device for closing a fiber-wound shell sand core mold

Abstract

This invention discloses a positioning and processing device for closing a fiber-wound shell sand core mold, including a base, a slide rail, a processing mechanism, and a fixing mechanism. The processing mechanism includes a sliding seat, a first frame, a rotating ring, an internal gear, an external gear shaft, and an external gear. Several rack tracks are arranged on the first frame along the circumference of the rotating ring, with the extension line of the rack tracks intersecting the center of the rotating ring. Racks are arranged on the rack tracks, and cutting plates are arranged on the racks. The fixing mechanism includes a mounting seat, a sand core baffle, a fourth frame, a third frame, a three-jaw chuck, a mandrel, and a sand core mold. This invention solves the problem of uneven end faces perpendicular to the axis during sand core mold closing, where manual grinding is difficult to guarantee flatness. This leads to gaps at the end face contact points after the two sand core mold sections are closed, causing errors in the core mold dimensions, and potential depressions when attaching the insulation layer after mold closing, thus affecting the overall winding quality.

Description

Technical Field

[0001] This invention relates to the field of sand core mold processing technology, and in particular to a positioning processing device for closing a fiber-wound shell sand core mold. Background Technology

[0002] Solid rocket motor casings currently utilize high-performance fiber composite materials, primarily manufactured using fiber winding technology. In the fiber winding process for small-aperture casings, sand core molds are widely used as winding templates. Soluble sand core molds are simple in structure, have low tooling costs, and are easy to manufacture. Demolding simply requires rinsing the sand core mold with water to dissolve it, resulting in a complete casing. Water-soluble sand core molds are widely used domestically and internationally, employing polyvinyl alcohol solution and quartz sand as raw materials. However, when removing the sand core mold from its manufacturing apparatus, it is difficult to avoid some quartz sand shedding from the mold's end face, resulting in lower flatness and affecting the overall axial dimensional accuracy of the mold. The dimensions of the sand core mold directly influence the dimensions of the wound product, causing discrepancies between the actual wound product dimensions and the design dimensions.

[0003] In existing sand core mold assembly processes, the flatness of the end face is typically addressed by using sand cores prepared with traditional machining equipment. Mold assembly then involves removing the pre-processed sand core mold and fitting it onto a mandrel. This method increases the number of shell winding steps, extending the production cycle.

[0004] To address the aforementioned problems, this invention provides a positioning and processing device for closing a fiber-wound shell sand core mold, thereby solving the issues of low processing accuracy and long processing cycle of previous sand core mold processing devices. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning and processing device for closing a fiber-wound shell sand core mold, thereby improving the processing efficiency and quality of the sand core mold.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A positioning and processing device for closing a fiber-wound shell sand core mold includes a base, a slide rail disposed on the base, a processing mechanism slidably disposed on the slide rail, and a fixing mechanism fixedly disposed on the slide rail. The processing mechanism includes a sliding seat disposed on the slide rail, a first frame disposed on the sliding seat, a rotating ring embedded in the first frame and rotatable, an internal gear disposed on the inner ring of the rotating ring, an external gear shaft disposed on the inner ring of the rotating ring and fixedly connected to the first frame, and an external gear disposed on the external gear shaft. The external gear meshes with the internal gear, and the external gear meshes with the internal gear. The first frame is connected by a keyway. Several rack tracks are arranged along the circumference of the rotating ring on the first frame. The extension line of each rack track intersects the center of the rotating ring. A rack is provided on each rack track, and the rack meshes with the external gear. A cutting plate is provided on the rack. The fixing mechanism includes a mounting base fixed on the slide rail, a sand core baffle on the mounting base, a fourth frame on the slide rail and away from the first frame, a third frame on the fourth frame, a three-jaw chuck on the third frame, a mandrel on the three-jaw chuck, and a sand core mold on the mandrel.

[0008] Preferably, a second frame is provided on the first frame, the second frame is annular, the rotating ring is provided on the second frame, and the rotating ring is driven by a drive motor.

[0009] Preferably, a handle for manually driving the rotating ring to rotate is provided on the side of the rotating ring away from the sand core mold.

[0010] Preferably, the included angles formed by adjacent extended lines of the rack track are equal.

[0011] Preferably, the cutting plate is fan-shaped, and the arc edge of the fan shape is far away from the center of the inner circle of the rotating ring.

[0012] Preferably, the base also has a scale, which is arranged along the direction of the base, and the initial scale of the scale is on the side of the sand core baffle closest to the first frame.

[0013] The present invention achieves the following technical effects compared to the prior art:

[0014] 1. This invention solves the problem of uneven end faces perpendicular to the axis during sand core mold assembly, which is difficult to guarantee with manual grinding. This results in gaps at the contact points of the end faces after the two sand core mold sections are assembled, causing errors in the core mold dimensions. It also addresses the issue of potential depressions when attaching the insulation layer after mold assembly, thus affecting the overall winding quality.

[0015] 2. In this invention, the sliding seat can move back and forth according to the required axial dimension of the sand core mold, and the three-jaw chuck can clamp mandrels of different sizes.

[0016] 3. In this invention, the sand core mold processing and mold assembly processes can be carried out on the same equipment, shortening the production cycle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Appendix Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Appendix Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0020] Appendix Figure 3 This is a schematic diagram of the relevant structures on the first frame of the present invention;

[0021] Appendix Figure 4 This is a schematic diagram of the rack and rack track of the present invention;

[0022] The components are as follows: 1. First frame; 2. Rotary ring; 3. Internal gear; 4. External gear; 5. Rack and pinion track; 6. Rack; 7. Cutting plate; 8. Sliding seat; 9. Slide rail; 10. Rib plate; 11. External gear shaft; 12. Second frame; 13. Handle; 14. Three-jaw chuck; 15. Third frame; 16. Sand core mold; 17. Sand core baffle; 18. Mandrel; 19. Fourth frame; 20. Scale; 21. Base; 22. Drive motor. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The purpose of this invention is to provide a positioning and processing device for closing a fiber-wound shell sand core mold, thereby improving the processing efficiency and quality of the sand core mold.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] refer to Figures 1 to 4 A positioning and processing device for closing a fiber-wound shell sand core mold includes a base, a slide rail disposed on the base, a processing mechanism slidably disposed on the slide rail, and a fixing mechanism fixedly disposed on the slide rail. The processing mechanism includes a sliding seat disposed on the slide rail, a first frame disposed on the sliding seat, a rotating ring embedded in the first frame and rotatable, an internal gear disposed on the inner ring of the rotating ring, an external gear shaft disposed on the inner ring of the rotating ring and fixedly connected to the first frame, and an external gear disposed on the external gear shaft. The external gear meshes with the internal gear and is keyed to the external gear shaft. A plurality of rack tracks are disposed on the first frame along the circumference of the rotating ring, and the extension lines of the rack tracks intersect with the center of the rotating ring. The intersecting rack and pinion track is provided with a rack, which meshes with the external gear, and a cutting plate is provided on the rack; the fixing mechanism includes a mounting base fixedly provided on the slide rail, a sand core baffle provided on the mounting base, a fourth frame provided on the slide rail and away from the first frame, a third frame provided on the fourth frame, a three-jaw chuck provided on the third frame, a mandrel provided on the three-jaw chuck, and a sand core mold provided on the mandrel; the present invention solves the problem that the end face perpendicular to the axis of the sand core mold is uneven when the mold is closed, and it is difficult to ensure the flatness by manual grinding. This results in gaps at the end face contact point after the two sand core molds are closed, which causes errors in the size of the core mold and may cause depressions when the insulation layer is pasted after the mold is closed, thus affecting the overall winding quality.

[0027] refer to Figure 2 A second frame is set on the first frame. The second frame is circular, and a rotating ring is set on the second frame. The rotating ring is driven by a drive motor.

[0028] refer to Figure 2 A handle for manually driving the rotating ring is provided on the side of the rotating ring away from the sand core mold.

[0029] Furthermore, the included angles formed by the extensions of adjacent rack tracks are equal;

[0030] refer to Figure 3 The cutting plate is fan-shaped, and the arc edge of the fan shape is far away from the center of the inner circle of the rotating ring.

[0031] refer to Figure 2 There is also a scale on the base, which is arranged along the direction of the base. The initial scale of the scale is close to the side of the sand core baffle near the first frame.

[0032] Furthermore, as the rack slides, it will cause the cutting plate to slide as well, thereby achieving the purpose of cutting the sand core mold.

[0033] refer to Figure 1 The sliding base is fixed to the first frame by ribs. The sliding base can slide on the slide rail. According to the required axial dimension of the sand core mold, the sliding base drives the first frame and its devices to the relevant position on the scale. The sand core baffle is fixed on the slide rail, corresponding to the 0mm mark on the scale. During sand core processing, the end face of the sand core mold is in contact with the sand core baffle to determine the axial distance of the other end face of the sand core. The three-jaw chuck is axially fixed on the third frame and clamps the mandrel. When the cutting plate is close to the mandrel, the three-jaw chuck can be rotated to drive the sand core mold to rotate and cut off the remaining sand core on the end face. When the end face of the sand core mold is processed flat, it can be removed from the mandrel and the other half of the sand core mold can be installed. After both sand core molds are processed, they can be simultaneously put into the mandrel for mold closing and subsequent work.

[0034] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0035] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A positioning processing method for closing a fiber-wound shell sand core mold, comprising a positioning processing device for closing a fiber-wound shell sand core mold, characterized in that, The device includes a base, a slide rail mounted on the base, a processing mechanism slidably mounted on the slide rail, and a fixing mechanism fixedly mounted on the slide rail. The processing mechanism includes a sliding seat mounted on the slide rail, a first frame mounted on the sliding seat, a rotating ring embedded in the first frame and rotatable, an internal gear mounted on the inner ring of the rotating ring, an external gear shaft mounted on the inner ring of the rotating ring and fixedly connected to the first frame, and an external gear mounted on the external gear shaft. The external gear meshes with the internal gear and is keyed to the external gear shaft. A plurality of rack tracks are arranged on the frame along the circumference of the rotating ring. The extension line of the rack tracks intersects the center of the rotating ring. Racks are arranged on the rack tracks and mesh with the external gear. A cutting plate is arranged on the rack. The fixing mechanism includes a mounting base fixed on the slide rail, a sand core baffle arranged on the mounting base, a fourth frame arranged on the slide rail and away from the first frame, a third frame arranged on the fourth frame, a three-jaw chuck arranged on the third frame, a mandrel arranged on the three-jaw chuck, and a sand core mold arranged on the mandrel. The method includes: during sand core processing, the end face of the sand core mold is in contact with the sand core baffle; a three-jaw chuck clamps the mandrel; when the cutting plate approaches the mandrel, the three-jaw chuck is rotated to drive the sand core mold to rotate, so as to cut off the residual sand core on the end face; when the end face of the sand core mold is processed flat, it can be removed from the mandrel and the other half of the sand core mold can be installed; after both sand core molds are processed, they can be simultaneously put into the mandrel for mold closing and subsequent work.

2. The positioning and processing method for closing a fiber-wound shell sand core mold according to claim 1, characterized in that, A second frame is mounted on the first frame. The second frame is circular, and the rotating ring is mounted on the second frame. The rotating ring is driven by a drive motor.

3. The positioning and processing method for closing a fiber-wound shell sand core mold according to claim 2, characterized in that, A handle for manually driving the rotating ring to rotate is provided on the side of the rotating ring away from the sand core mold.

4. The positioning and processing method for closing a fiber-wound shell sand core mold according to claim 1, characterized in that, The included angles formed by the extensions of adjacent rack tracks are equal.

5. A positioning processing method for closing a fiber-wound shell sand core mold according to claim 4, characterized in that, The cutting plate is fan-shaped, and the arc edge of the fan shape is far away from the center of the inner circle of the rotating ring.

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