Lineation device and method for annular guide pipe of liquid rocket engine

Abstract

The invention discloses a liquid rocket engine annular guide pipe marking device and method. The liquid rocket engine annular guide pipe marking device comprises a base, a positioning baffle, a marking sliding block and a positioning clamping mechanism. The base is of a hollow annular pipeline structure, a hollow cavity is open, and the inner wall face of the cavity is in a semi-arc shape. The two positioning baffles are fixed in the cavity and serve as scribing references, and the annular pipeline is divided into a long section and a short section; the long section is used for bearing the annular guide pipe, and the positioning and clamping mechanism is used for fastening the annular guide pipe; a lineation groove is formed in the long section of the annular pipeline according to the unfolding angle of the annular guide pipe, and the lineation sliding block slides in the lineation groove. By adjusting the contact face of the annular guide pipe and the positioning baffle and cooperating with sliding of the lineation sliding block, lineation of the annular guide pipe is achieved. According to the marking device, accurate and rapid marking of the annular guide pipe can be achieved, the production efficiency and consistency of products are improved, the skill requirement for operators is lowered, and the product quality of an engine is further guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of liquid rocket engine annular duct manufacturing, in particular to a liquid rocket engine annular duct scribing device and method. BACKGROUND

[0002] As an important step in mechanical processing, the scribing process is currently widely used in China. Corresponding scribing tools are also diversified. Common scribing tools include steel ruler, scribing platform, V-shaped iron, powder line, angle ruler, scribing disc, scribing needle, scribing gauge, compass, and sample punch, etc. Precise scribing equipment includes laser scribing instrument, three-coordinate measuring scribing instrument, and precise boring scribing, etc. Each of the above methods has its own advantages and disadvantages, and the corresponding scribing method should be selected according to different working conditions.

[0003] Although the above-mentioned scribing methods can achieve scribing of annular ducts in terms of working principle, they have problems such as low precision, high cost, or complicated process when applied to scribing of liquid rocket engine annular ducts. The traditional scribing working method requires two people to cooperate. When scribing, at least two people are needed to cooperate, one of whom holds the annular duct, and the other performs scribing. The relative position of the annular duct and the scribing template is prone to shift, the scribing process is complicated, and the extension scribing is difficult due to the circular cross-section of the annular duct, resulting in low precision, which to some extent affects the normal scientific research and production progress. It is urgent to design a scribing device specially used for scribing of annular ducts for production and manufacturing of liquid rocket engine annular ducts. SUMMARY

[0004] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide a liquid rocket engine annular duct scribing device and method to solve the problems of poor scribing precision and low efficiency caused by the original processing scribing method, and to realize the self-adaptive positioning and scribing function of the annular duct.

[0005] The technical solution of the present application is a liquid rocket engine annular duct scribing device, comprising a base, a positioning baffle, a scribing slider, and a positioning clamping mechanism.

[0006] The base is a hollow annular pipeline structure, the hollow cavity is open, and the inner wall surface of the cavity is in the shape of a semicircle. Two positioning baffles are fixed in the cavity as scribing reference, dividing the annular pipeline into two segments A and B, and the length of segment A is greater than that of segment B. Segment A is used to carry the annular duct, and the positioning clamping mechanism is used to fasten the annular duct. In segment A of the annular pipeline, a scribing groove is opened according to the unfolding angle of the annular duct, and the scribing slider slides in the scribing groove. By adjusting the contact surface of the annular duct and the positioning baffle, and cooperating with the sliding of the scribing slider, the scribing of the annular duct is realized.

[0007] Further, the profile of the base is consistent with the theoretical profile of the annular duct.

[0008] Further, the cross-sectional profile of the base is consistent with that of the annular duct, and the radius of the circular arc of the base is consistent with the theoretical radius of the circular arc of the annular duct.

[0009] Further, the outer contour bottom of the base is a plane to increase the contact area with the mounting platform.

[0010] Further, the positioning baffle is a flat plate structure and is connected to the base by welding.

[0011] Further, the included angle between the two positioning baffles is 30-150°, and the extension lines of the two positioning baffles converge at the center of the base.

[0012] Further, the positioning and clamping mechanism is fixed to the inner diameter end and the outer diameter end of the base on both sides and includes a clamp, a pin shaft, and a rotating member; the clamp is a semi-ring shape and is attached to the outer surface of the annular duct; the clamp is connected on one side through the pin shaft to realize the opening and closing of the clamp; the rotating member is rotated in and out on the other side of the clamp to realize the clamping adjustment of the annular duct.

[0013] Further, the positioning and clamping mechanism is 2.

[0014] Further, the inside of the scribing slider is attached to the part of the annular duct exposed from the base; the cross sections on both sides of the scribing slider are flush with the slotted edges on both sides of the scribing groove.

[0015] The application also provides a liquid rocket engine annular duct scribing method, which utilizes the liquid rocket engine annular duct scribing device as described above and includes the following steps:

[0016] One end of the annular duct is in contact with the inside of the first positioning baffle, the positioning and clamping mechanism is locked, the scribing slider is aligned with the slotted position of the scribing groove on the base, and scribing is performed.

[0017] The other end of the annular duct is in contact with the inside of the second positioning baffle, the positioning and clamping mechanism is locked, the scribing slider is aligned with the slotted position on the other side of the scribing groove on the base, and scribing is performed.

[0018] Compared with the prior art, the application has the following advantages:

[0019] The present application is based on the experience of a line designed scribing device, in the base of the open hollow annular pipeline, by setting two positioning baffle as scribing reference, the annular pipeline is divided into a longer section and a shorter section, through the longer section to carry the annular conduit, and according to the unfolding angle of the annular conduit, open scribing groove, through adjusting the contact surface of the annular conduit and the positioning baffle, and cooperating with the sliding of the scribing slider in the scribing groove, the annular conduit is accurately and quickly scribed, the efficiency and consistency of product production are improved, the skill requirement of the operator is reduced, and the product quality of the engine is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure diagram of liquid rocket engine annular conduit scribing device;

[0021] Figure 2 It is the principle diagram of the present application applied to annular conduit scribing.

[0022] BRIEF DESCRIPTION OF DRAWINGS:

[0023] 1-positioning baffle 2-base 3-scribing slider 4-pivot 5-split pin 6-hexagonal nut; 7-adapter block; 8 knurled flat head screw; 9 stop block; 10 clamp; 11 adapter shaft. DETAILED DESCRIPTION

[0024] In order to better understand the technical scheme of the present application, the specific embodiments of the present application are described below. The following description of the preferred embodiments will involve the combination of features, which may exist independently or in combination, and the present application is not particularly limited to the preferred embodiments.

[0025] The present application proposes a kind of for liquid rocket engine annular conduit scribing device, main technical principle:

[0026] 1) scribing alignment, use special tool to make the surface of workpiece to be machined be in proper position relative to reference.

[0027] 2) three principles of scribing sequence of machining. The first principle is to determine small face with large face. Since the product is aligned with large face, other smaller parallel faces, perpendicular faces or inclined faces will be in their respective positions. Otherwise, if small face is determined with large face, the large face may exceed the allowable error range. Therefore, the sequence of scribing can only be to scribe the largest face first, then the larger faces, and finally the smallest face. The second principle is to determine simple face with complex face. The complex face has more shape and position requirements. After aligning with complex face, the simple face is positioned with the position of complex face, which is less difficult. The third principle is that when the product has an inclined face, the scribing sequence should be determined according to the size of the inclined face. If the inclined face is larger than other faces, it should be scribed first. If the inclined face is equivalent or smaller than other faces, it should be scribed last.

[0028] The liquid rocket engine annular duct line marking device is composed of an adaptive support base, a line marking slider 3 and a positioning clamping mechanism. Figure 1 As shown, the adaptive support base comprises a base 2 and a positioning baffle 1; the positioning clamping mechanism comprises a pin shaft 4, a split pin 5, a hexagonal nut 6, an adapter block 7, a knurled flat head screw 8, a baffle 9, a clamp 10 and an adapter shaft 11.

[0029] The base 2 is a hollow annular structure; the profile of the base 2 is consistent with the theoretical profile of the cross section of the annular duct, so that the center of the annular duct can be automatically aligned by using the profile of the base; the cross section profile of the base 2 is consistent with the cross section profile of the annular duct, and the arc radius of the base is consistent with the theoretical arc radius of the annular duct, so that the profile and arc radius of the annular duct can be detected by using the base; the lowermost end of the base 2 is a flat surface to increase the contact surface with the platform.

[0030] The positioning baffle 1 is a flat plate structure connected with the base by welding, serving as a line marking reference; the extension lines of the two positioning baffles should converge at the center of the base, and the included angle between them is preferably 90°.

[0031] The end surface part of the base 2 is provided with a line marking groove according to the unfolding angle of the circular duct, which is used for marking the annular duct.

[0032] The components of the positioning clamping mechanism are connected with the base 2 by welding, which functions to clamp the annular duct during line marking to prevent the annular duct from moving and causing the line marking process to fail or the line marking precision to be poor.

[0033] The clamp 10 and the adapter block 7 in the positioning clamping mechanism component are connected by a pin shaft, and the clamp is a circular ring structure with an inner circle cross section, which can better fit the outer circular surface of the annular duct.

[0034] The knurled flat head screw 8 and the stop block 9 in the positioning clamping mechanism component are fixed relative to each other and can be freely screwed in and out, which functions to quickly position the clamp 10 to clamp the annular duct.

[0035] The line marking slider 3 functions to extend the marking line on the base 2 to the outer surface of the annular duct, and at the same time, it performs secondary positioning on the annular duct to prevent local buckling of the annular duct and improve the line marking precision.

[0036] The method for marking the liquid rocket engine annular duct by using the liquid rocket engine annular duct line marking device according to claim 1 is as follows:

[0037] As shown in Figure 2As shown, the annular conduit B end is contacted with the inner side of the second positioning baffle, the locking positioning clamping mechanism is locked, the scribing slider 3 is aligned with the slot position of the base 2, scribing is carried out, and thus the scribing work of one end of the annular conduit is completed;

[0038] The annular conduit A end is contacted with the inner side of the positioning baffle, the locking positioning clamping structure is locked, the scribing slider 2 is aligned with the other side of the slot of the base 1, scribing is carried out, and thus the scribing work of the other end of the annular conduit is completed.

[0039] The application solves the scribing problem of the annular conduit in the production process of the liquid rocket engine, can realize accurate and rapid scribing of the annular conduit, improves the production efficiency and consistency of the product, reduces the skill requirement of the operator, and further guarantees the product quality of the engine.

[0040] It can be understood that the application is described through the embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the application. In addition, the features and embodiments can be modified to adapt to specific conditions under the guidance of the application without departing from the spirit and scope of the application. Therefore, the application is not limited by the specific embodiments disclosed herein, and the embodiments falling within the scope of the claims of the application belong to the scope of protection of the application.

[0041] The contents not described in detail in the specification of the application are the known technology of those skilled in the art.

Claims

1. A liquid rocket engine annular duct scribe device, characterized by, The utility model relates to a liquid rocket engine annular pipe marking device, comprising a base (2), a positioning baffle (1), a marking slider (3) and a positioning clamping mechanism. The base (2) is a hollow annular pipeline structure, the hollow cavity is open, and the inner wall of the cavity is semicircular; two positioning baffles (1) are fixed in the cavity as marking references, dividing the annular pipeline into two sections A and B, and the annular length of section A is greater than that of section B; the positioning clamping mechanism is used to fasten the annular pipe; in section A of the annular pipeline, a marking groove is opened according to the unfolding angle of the annular pipe, and the marking slider (3) slides in the marking groove; by adjusting the contact surface of the annular pipe and the positioning baffle and cooperating with the sliding of the marking slider, the annular pipe is marked. The profile of the base (2) is consistent with the theoretical profile of the annular pipe.

2. The liquid rocket engine annular duct scribe device of claim 1, wherein: The cross-sectional profile of the base (2) is consistent with the cross-sectional profile of the annular pipe, and the arc radius of the base (2) is consistent with the theoretical arc radius of the annular pipe.

3. The liquid rocket engine annular duct scribe device of claim 1, wherein: The bottom of the outer contour of the base (2) is a plane to increase the contact area with the mounting platform.

4. The liquid rocket engine annular duct scribing device of claim 1, wherein: The positioning baffle (1) is a flat plate structure connected to the base (2) by welding.

5. The liquid rocket engine annular duct scribe device of claim 1, wherein: The included angle between the two positioning baffles (1) is 30-150°, and the extension lines of the two positioning baffles converge at the center of the base.

6. The liquid rocket engine annular duct scribe device and method of claim 1, wherein: The positioning clamping mechanism is fixed to the inner diameter end and the outer diameter end of the base, comprising a clamp, a pin shaft and a rotating part; the clamp is a semicircle and fits the outer surface of the annular pipe; 7. The liquid rocket engine annular duct scribing device of claim 1, wherein: One side of the clamp is connected by a pin shaft to realize the opening and closing of the clamp; the rotating part rotates in and out of the other side of the clamp to realize the clamping adjustment of the annular pipe. The positioning clamping mechanism is two.

8. The liquid rocket engine annular duct scribing device of claim 7, wherein: The marking slider (3) fits the part of the annular pipe exposed from the base; the cross sections of the two sides of the marking slider are flush with the slot edges of the two sides of the marking groove.

9. The liquid rocket engine annular duct scribe device of claim 1, wherein: The liquid rocket engine annular pipe marking device comprises the following steps:

10. A method of scribing a liquid rocket engine annular duct, characterized in that: One end of the annular pipe is in contact with the inner side of the first positioning baffle, the positioning clamping mechanism is locked, the marking slider (3) is aligned with the slot opening position of the marking groove on the base (2), and marking is performed; The other end of the annular pipe is in contact with the inner side of the second positioning baffle, the positioning clamping mechanism is locked, the marking slider (3) is aligned with the slot opening position of the other side of the marking groove on the base (2), and marking is performed. ​

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