Three-coordinate batch detection tool for oxidizing agent nozzle

Abstract

The application discloses an oxidant nozzle three-coordinate batch detection tool, which comprises a horizontal clamping device, a bottom plate, a cover plate, a nozzle fixing device and a guide column; the cover plate is guided to be combined on the bottom plate through the guide column; the horizontal clamping device is installed on the bottom plate and is used for clamping and fixing the cover plate and the bottom plate; and the nozzle fixing device is installed and fixed through the bottom plate and the cover plate and is used for positioning and clamping the oxidant nozzle. The oxidant nozzle three-coordinate batch detection tool has the characteristics of simple operation and high batch efficiency, can efficiently complete batch clamping of the oxidant nozzle, improves three-coordinate detection efficiency, guarantees the stability and positioning precision of clamping, reduces the manual operation strength, and solves the problems of low clamping efficiency and insufficient positioning precision in the existing oxidant nozzle three-coordinate detection.

Description

Technical Field

[0001] This invention belongs to the field of liquid rocket engine testing auxiliary tool design technology, and particularly relates to a three-coordinate batch testing fixture for oxidizer nozzles. Background Technology

[0002] When a liquid rocket engine is working, the nozzle atomizes and mixes the fuel and oxidizer to produce efficient and stable combustion. The machining accuracy of the nozzle directly affects the atomization and combustion effect of the fuel and oxidizer, and even affects the overall stability of the engine. Therefore, strict three-coordinate inspection is required during the nozzle production process.

[0003] Currently, when performing coordinate measuring machine (CMM) inspection on nozzles, a single positioning and clamping method is usually used, meaning that only one nozzle can be positioned and fixed at a time before inspection. This method has problems such as low inspection efficiency, high labor intensity of manual positioning, and the possibility of errors due to multiple positioning, making it difficult to meet the inspection requirements of large-scale production. Summary of the Invention

[0004] The technical problem solved by the present invention is to overcome the shortcomings of the prior art and provide a three-coordinate batch inspection fixture for oxidant nozzles, which can simultaneously achieve precise positioning and fixing of multiple oxidant nozzles, thereby improving inspection efficiency and accuracy.

[0005] To address the aforementioned technical problems, this invention discloses a three-coordinate batch inspection fixture for oxidant nozzles, comprising: a horizontal clamping device, a base plate, a cover plate, a nozzle fixing device, and a guide post; wherein, the cover plate is guided and fitted onto the base plate by the guide post; the horizontal clamping device is installed on the base plate to clamp and fix the cover plate to the base plate; the nozzle fixing device is installed and fixed through the base plate and the cover plate to achieve positioning and clamping of the oxidant nozzle.

[0006] The above-mentioned three-coordinate batch inspection fixture for oxidant nozzles also includes a handle; wherein the handle is mounted on the cover plate and is used for picking up and placing the cover plate.

[0007] In the above-mentioned three-coordinate batch inspection fixture for oxidant nozzles, the nozzle fixing device includes: a positioning post, a pressure plate, screws, and springs; wherein, the bottom of the positioning post is fixed to the base plate and is used to position the bottom of the oxidant nozzle; the pressure plate is installed on the cover plate by screws and springs and is used to press the outer stepped surface of the oxidant nozzle, cooperating with the positioning post to achieve positioning and clamping of the oxidant nozzle.

[0008] In the above-mentioned three-coordinate batch inspection fixture for oxidant nozzles, a positioning boss is provided on the top of the positioning column, which is adapted to the bottom of the oxidant nozzle. The size of the positioning boss matches the size of the bottom hole of the oxidant nozzle, and the fitting gap is no more than 0.05mm.

[0009] In the above-mentioned three-coordinate batch inspection fixture for oxidant nozzles, the screw passes through the pressure plate and is connected to the cover plate; the spring is fitted on the outside of the screw, and the two ends of the spring abut against the screw nut and the pressure plate respectively.

[0010] In the above-mentioned three-coordinate batch inspection fixture for oxidant nozzles, the base plate is provided with: guide post mounting holes, horizontal clamping device mounting holes, and positioning post mounting holes; wherein, the guide post mounting holes are used to realize the installation and fixation of the guide post and the base plate; the horizontal clamping device mounting holes are used to realize the installation and fixation of the horizontal clamping device and the base plate; and the positioning post mounting holes are used to realize the installation and fixation of the positioning post and the base plate.

[0011] In the above-mentioned three-coordinate batch inspection fixture for oxidant nozzles, the cover plate is provided with: a guide hole, a handle mounting hole, and a screw mounting hole; wherein, the guide hole is used to cooperate with the guide post to achieve precise positioning of the cover plate and the base plate; the handle mounting hole is used to install and fix the handle to the cover plate; and the screw mounting hole is used to install and fix the screw to the cover plate.

[0012] In the above-mentioned three-coordinate batch inspection fixture for oxidant nozzles, the guide column includes: a positioning section and a guiding section; wherein, the positioning section cooperates with the guide hole to achieve precise positioning of the cover plate and the base plate; the guiding section is used to guide the cover plate to close.

[0013] In the aforementioned three-coordinate batch inspection fixture for oxidant nozzles Six horizontal clamping devices are evenly distributed around the base plate; The 32 nozzle fixing devices are arranged in a matrix on the base plate and the cover plate, with equal spacing between two adjacent nozzle fixing devices; Four guide columns are installed and fixed at the four top corners of the base plate; Two handles are symmetrically installed on both sides of the cover plate.

[0014] In the above-mentioned three-coordinate batch inspection fixture for oxidant nozzles, the base plate, cover plate, and guide column are all made of high-strength steel and have undergone quenching treatment.

[0015] The present invention has the following advantages: (1) The present invention discloses a three-coordinate batch inspection fixture for oxidant nozzles, which adopts a design of several nozzle fixing devices to realize batch clamping of oxidant nozzles and greatly improves the inspection efficiency.

[0016] (2) The present invention discloses a three-coordinate batch inspection fixture for oxidant nozzles. The radial positioning accuracy of the oxidant nozzle is ensured by the cooperation of the positioning column with the inner wall of the oxidant nozzle. The axial elastic clamping of the oxidant nozzle is achieved by the pressure plate combined with the spring. The secondary fixation of the horizontal clamping device ensures the clamping stability and reduces the positioning error.

[0017] (3) The present invention discloses a three-coordinate batch inspection fixture for oxidant nozzles. The pressure plate presses the oxidant nozzles under the elastic action of the spring, which can adapt to the small size difference at the top of the oxidant nozzles and avoid overpressure damage. At the same time, it can press all oxidant nozzles.

[0018] (4) The present invention discloses a three-coordinate batch inspection fixture for oxidant nozzles. The overall structure is simple, the operation is convenient, the manual labor intensity is reduced, and it is suitable for three-coordinate batch inspection of oxidant nozzles. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a three-coordinate batch inspection fixture for oxidant nozzles in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a nozzle fixing device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a base according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a cover plate in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a guide post in an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments disclosed herein will be described in further detail below with reference to the accompanying drawings.

[0021] One of the core ideas of this invention is to disclose a three-coordinate batch inspection fixture for oxidant nozzles, mainly composed of a horizontal clamping device, a base plate, a cover plate, a nozzle fixing device, guide posts, and a handle. The nozzle fixing device mainly consists of a positioning post, a pressure plate, screws, and springs. The positioning post is fixed to the base plate, and the pressure plate is connected to the cover plate by screws and springs. Multiple nozzle fixing devices are evenly distributed on the base plate and the cover plate. The horizontal clamping device is installed on the base plate and is used to press the cover plate. The cover plate, through springs, drives the pressure plate to press the oxidant nozzles, thereby simultaneously achieving the positioning and fixing of multiple oxidant nozzles. The three-coordinate batch inspection fixture for oxidant nozzles described in this invention has the characteristics of simple operation and high batch efficiency. It can efficiently complete the batch clamping of oxidant nozzles, improve the efficiency of three-coordinate inspection, and at the same time ensure the stability and positioning accuracy of clamping, reduce the intensity of manual operation, and solve the problems of low clamping efficiency and insufficient positioning accuracy in the existing three-coordinate inspection of oxidant nozzles.

[0022] Reference Figure 1In this embodiment, the three-coordinate batch inspection fixture for oxidant nozzles includes: a horizontal clamping device 1, a base plate 2, a cover plate 3, a nozzle fixing device 4, and a guide post 5. The cover plate 3 is guided and fitted onto the base plate 2 by the guide post 5; the horizontal clamping device 1 is mounted on the base plate 2 to clamp and fix the cover plate 3 to the base plate 2; the nozzle fixing device 4 is installed and fixed through the base plate 2 and the cover plate 3 to position and clamp the oxidant nozzle 404.

[0023] In this embodiment, the oxidant nozzle three-coordinate batch inspection fixture further includes a handle 6. The handle 6 is mounted on the cover plate 3 and is used for picking up and placing the cover plate 3.

[0024] In this embodiment, as Figure 2 As shown, the nozzle fixing device 4 mainly includes: a positioning post 401, a pressure plate 402, a screw 403, and a spring 405. The positioning post 401 is fixed at its bottom to the base plate 2 and is used to position the bottom of the oxidant nozzle 404. The pressure plate 402 is mounted on the cover plate 3 via the screw 403 and the spring 405, and is used to press against the outer stepped surface of the oxidant nozzle 404, thus cooperating with the positioning post 401 to achieve the positioning and clamping of the oxidant nozzle 404.

[0025] Preferably, the top of the positioning post 401 is provided with a positioning boss that matches the bottom of the oxidant nozzle 404, thereby achieving radial positioning of the oxidant nozzle 404; the size of the positioning boss matches the size of the bottom hole of the oxidant nozzle 404, and the fitting clearance is no greater than 0.05mm. When the positioning post 401 is installed on the base plate 2, it is necessary to ensure that the perpendicularity between the axis of the positioning post 401 and the base plate 2 is no greater than 0.01.

[0026] Preferably, the screw 403 passes through the pressure plate 402 and is connected to the cover plate 3; the spring 405 is fitted on the outside of the screw 403, and the two ends of the spring 405 abut against the nut of the screw 403 and the pressure plate 402 respectively.

[0027] Preferably, when it is necessary to fix the oxidant nozzle 404, the bottom of the oxidant nozzle 404 is placed on the positioning post protrusion on the top of the positioning post 401, the cover plate 3 is covered, the horizontal clamping device 1 is pressed, and the pressure plate 402 moves downward under the action of the screw 403 and the spring 405 to press the top step surface of the oxidant nozzle 404, while the spring 405 is compressed.

[0028] In this embodiment, the base plate 2 is made of high-strength steel and undergoes quenching treatment to improve its strength and wear resistance. For example... Figure 3As shown, the base plate 2 is provided with: guide post mounting holes 201, horizontal clamping device mounting holes 202, and positioning post mounting holes 203. The guide post mounting holes 201 are used to install and fix the guide post 5 to the base plate 2; the horizontal clamping device mounting holes 202 are used to install and fix the horizontal clamping device 1 to the base plate 2; and the positioning post mounting holes 203 are used to install and fix the positioning post 401 to the base plate 2.

[0029] In this embodiment, the cover plate 3 is made of high-strength steel and undergoes quenching treatment to improve its strength and wear resistance. For example... Figure 4 As shown, the cover plate 3 is provided with: a guide hole 301, a handle mounting hole 302, and a screw mounting hole 303. The guide hole 301 is used to cooperate with the guide post 5 to achieve precise positioning of the cover plate 3 and the base plate 2, preventing relative movement between the two from affecting the positioning accuracy of the oxidizer nozzle; the handle mounting hole 302 is used to install and fix the handle 6 to the cover plate 3; and the screw mounting hole 303 is used to install and fix the screw 403 to the cover plate 3.

[0030] In this embodiment, the guide post 5 is made of high-strength steel and undergoes quenching treatment to improve its strength and wear resistance. Figure 5 As shown, the guide post 5 consists of a positioning section 501 and a guiding section 502. The positioning section 501 cooperates with the guide hole 301 to achieve precise positioning of the cover plate 3 and the base plate 2; the guiding section 502 is used to guide the cover plate 3 to close.

[0031] In this embodiment, under a specific practical application scenario: the horizontal clamping device 1 is a commercially available part, and there are 6 of them, which are evenly distributed around the base plate 2. There are 32 nozzle fixing devices 4, arranged in a matrix on the base plate 2 and the cover plate 3, enabling simultaneous clamping of multiple oxidant nozzles. The spacing between adjacent nozzle fixing devices 4 is equal, facilitating the regular movement and detection of the probe of the coordinate measuring machine. Four guide posts 5 are installed and fixed at the four top corners of the base plate 2. Two handles 6 are symmetrically installed on both sides of the cover plate 3. Correspondingly, the base plate 2 is provided with: four guide post mounting holes 201 for installing and fixing the four guide posts 5, six sets of horizontal clamping device mounting holes 202 for installing and fixing the six horizontal clamping devices 1, and 32 positioning post mounting holes 203 for installing and fixing the 32 nozzle fixing devices 4. The cover plate 3 is provided with: four guide holes 301 for cooperating with four guide posts 5, two sets of handle mounting holes 302 for mounting and fixing two handles 6, and 32 sets of screw mounting holes 303 for mounting and fixing 32 nozzle fixing devices 4.

[0032] In this embodiment, when the oxidant nozzle 404 needs to be inspected by a coordinate measuring machine (CMM), the base plate 2 is first placed on the CMM worktable and fixed. The 32 oxidant nozzles 404 to be inspected are then placed on the positioning bosses on the tops of the corresponding 32 positioning posts 401 on the base plate 2, so that the bottom of the oxidant nozzle 404 contacts the positioning post 401, and the inner hole at the bottom of the oxidant nozzle 404 engages with the positioning boss, thus achieving initial positioning of the oxidant nozzle 404. Further, the cover plate 3 is connected to the base plate 2 via the guide hole 301. The corresponding guide post 5 is installed in place, and at this time, the top of each oxidant nozzle 404 corresponds to a pressure plate 402; the cover plate 3 is clamped by the horizontal clamping device 1, and at the same time, the pressure plate 402 elastically presses the step surface of each oxidant nozzle 404 under the action of screw 403 and spring 405. The three-coordinate measuring machine is started, and the 32 oxidant nozzles 404 can be batch inspected; after the inspection is completed, the horizontal clamping device 1 is released, the cover plate 3 and the oxidant nozzles 404 are removed, and the three-coordinate measuring machine inspection of the oxidant nozzles 404 is completed.

[0033] In summary, this invention discloses a three-coordinate batch inspection fixture for oxidant nozzles. A positioning post is vertically fixed to a base plate, with its top positioning boss's outer wall matching the inner wall of the oxidant nozzle to achieve radial positioning. A pressure plate is connected to a cover plate via screws, each screw having a spring sleeve. The spring's ends abut against the pressure plate and the screw's nut, respectively, giving the pressure plate elastic clamping capability. This allows it to conform to the top stepped surface of the oxidant nozzle for fixation. The cover plate is fitted onto the base plate, achieving precise alignment through guide holes and a guide post on the base plate. The pressure plate above it, under the action of the spring, engages with the positioning post to clamp the oxidant nozzle. Horizontal clamping devices are evenly distributed along the axial direction of the base plate and fixed to it, used to clamp the cover plate and the base plate. This fixture can simultaneously and precisely position and fix multiple oxidant nozzles, improving inspection efficiency and accuracy. It solves the problems of low inspection efficiency, high labor intensity of manual positioning, and errors easily generated by multiple positioning operations in existing single-nozzle positioning inspection schemes.

[0034] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

[0035] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A three-coordinate batch inspection fixture for oxidant nozzles, characterized in that, include: The device includes a horizontal clamping device (1), a base plate (2), a cover plate (3), a nozzle fixing device (4), and a guide post (5). The cover plate (3) is guided and closed onto the base plate (2) by the guide post (5). The horizontal clamping device (1) is installed on the base plate (2) to clamp and fix the cover plate (3) to the base plate (2). The nozzle fixing device (4) is installed and fixed by the base plate (2) and the cover plate (3) to position and clamp the oxidant nozzle (404).

2. The three-coordinate batch inspection fixture for oxidant nozzles according to claim 1, characterized in that, Also includes: Handle (6); wherein the handle (6) is mounted on the cover plate (3) and is used for taking the cover plate (3) off.

3. The three-coordinate batch inspection fixture for oxidant nozzles according to claim 2, characterized in that, The nozzle fixing device (4) includes: a positioning post (401), a pressure plate (402), a screw (403), and a spring (405); wherein, the bottom of the positioning post (401) is fixed on the base plate (2) and is used to position the bottom of the oxidant nozzle (404); the pressure plate (402) is installed on the cover plate (3) by the screw (403) and the spring (405) and is used to press the outer step surface of the oxidant nozzle (404) and cooperate with the positioning post (401) to achieve positioning and clamping of the oxidant nozzle (404).

4. The three-coordinate batch inspection fixture for oxidant nozzles according to claim 3, characterized in that, The top of the positioning post (401) is provided with a positioning boss that is adapted to the bottom of the oxidant nozzle (404). The size of the positioning boss matches the size of the bottom hole of the oxidant nozzle (404), and the fitting gap is no more than 0.05mm.

5. The three-coordinate batch inspection fixture for oxidant nozzles according to claim 4, characterized in that, The screw (403) passes through the pressure plate (402) and is connected to the cover plate (3); the spring (405) is fitted on the outside of the screw (403), and the two ends of the spring (405) abut against the nut of the screw (403) and the pressure plate (402) respectively.

6. The coordinate measuring machine tooling for batch inspection of oxidant nozzles according to claim 3, characterized in that, The base plate (2) is provided with: guide post mounting hole (201), horizontal clamping device mounting hole (202) and positioning post mounting hole (203); wherein, the guide post mounting hole (201) is used to realize the installation and fixation of the guide post (5) and the base plate (2); the horizontal clamping device mounting hole (202) is used to realize the installation and fixation of the horizontal clamping device (1) and the base plate (2); the positioning post mounting hole (203) is used to realize the installation and fixation of the positioning post (401) and the base plate (2).

7. The coordinate measuring machine tooling for batch inspection of oxidant nozzles according to claim 3, characterized in that, The cover plate (3) is provided with: a guide hole (301), a handle mounting hole (302) and a screw mounting hole (303); wherein, the guide hole (301) is used to cooperate with the guide post (5) to achieve precise positioning of the cover plate (3) and the base plate (2); the handle mounting hole (302) is used to install and fix the handle (6) to the cover plate (3); the screw mounting hole (303) is used to install and fix the screw (403) to the cover plate (3).

8. The coordinate measuring machine tooling for batch inspection of oxidant nozzles according to claim 7, characterized in that, The guide post (5) includes a positioning section (501) and a guide section (502); wherein, the positioning section (501) cooperates with the guide hole (301) to achieve precise positioning of the cover plate (3) and the base plate (2); the guide section (502) is used to guide the cover plate (3) to close.

9. The three-coordinate batch inspection fixture for oxidant nozzles according to claim 1, characterized in that, Six horizontal clamping devices (1) are evenly distributed around the base plate (2); 32 nozzle fixing devices (4) are arranged in a matrix on the base plate (2) and the cover plate (3), with equal spacing between two adjacent nozzle fixing devices (4); Four guide columns (5) are installed and fixed at the four top corners of the base plate (2); Two handles (6) are symmetrically installed on both sides of the cover plate (3).

10. The coordinate measuring machine tooling for batch inspection of oxidant nozzles according to claim 1, characterized in that, The base plate (2), cover plate (3), and guide column (5) are all made of high-strength steel and have been quenched.

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