Four-axis machining jig for composite material launching canister

Abstract

A four-axis machining jig for a composite material launch canister comprises two supporting flanges and a plurality of supporting seats, and at least two supporting bearings used for being matched with the composite material launch canister are installed on the supporting seats. A central spindle used for being matched with an external machine tool is fixedly installed in the middle of the supporting flange, and a plurality of end stop plates used for limiting the composite material launching tube are installed on the peripheral side, close to one side of the central spindle, of the supporting flange through bolts. A plurality of wedge-shaped sliding blocks used for positioning the composite material launching tube are installed on the peripheral side of the side, away from the mandrel, of the supporting flange through bolts, wedge-shaped grooves matched with the wedge-shaped sliding blocks are formed in the supporting flange, and threaded holes are formed in the wedge-shaped grooves. According to the cylinder body end face drilling and turning machine tool, multiple procedures including outer circle face drilling, outer circle face turning, end face machining and drilling can be completed under the condition of one-time clamping, the precision of indexing holes in the end portion of a cylinder body can be accurately controlled, and accumulated errors caused by secondary clamping are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material processing, in particular to a four-axis processing fixture for a composite material launch tube. Background Art

[0002] With the continuous development of technology, the requirements for weapon equipment in today's battlefield are getting higher and higher, especially in the field of missile launch. Among them, the launch tube is a cylindrical device for storing, transporting and launching missiles. The traditional launch device is made of metal materials, which has the disadvantages of being heavy, poor in concealment and poor in mobility. In contrast, composite materials have excellent characteristics such as light weight, high strength, corrosion resistance and high safety, and are widely used in fields such as automobiles, energy, chemical industry, aerospace and rail transit. Therefore, composite materials are increasingly used in the preparation of missile launch tubes.

[0003] In the preparation of composite material launch tubes, more attention is paid to their processing accuracy. How to ensure their processing accuracy has become a key problem that must be faced at present. The processing accuracy of composite material launch tubes is mainly affected by three aspects:

[0004] 1. Geometric errors of equipment (geometric errors of machine tools, cutting tools, and fixtures);

[0005] 2. Positioning errors (errors existing in the datum and positioning interlock);

[0006] 3. Errors caused by material stress deformation (errors generated by the material mechanical properties of cutting tools and workpieces);

[0007] In the case where high-precision processing machinery dominated by foreign advanced equipment and materials has taken the lead, how to design a more ingenious four-axis processing fixture is particularly important during the processing.

[0008] During the processing of traditional launch tubes, they are often clamped directly through the three-jaw chuck of the machine tool itself and then processed. However, there are various defects in this processing process. For example, there are few internal support points, which easily leads to out-of-roundness, and the adjustable range is small, which easily damages the inner surface of the tube; and the length fit is small, and end face and end face hole processing cannot be carried out, and it is inevitable that there will be interference with the processing surface. In this way, secondary clamping, repositioning and finding the datum are often required, and the processing position of the product is likely to change, resulting in product errors at least and product scrapping and economic losses at worst. Summary of the Utility Model

[0009] The technical problem to be solved by the present utility model is to provide a four-axis processing fixture for a composite material launch tube in view of the deficiencies of the prior art, which can complete multiple processes in one clamping, including drilling on the outer cylindrical surface, turning the outer cylindrical surface, end face processing and drilling, and can accurately control the accuracy of the indexing holes at the end of the cylinder body to avoid the cumulative error caused by secondary clamping.

[0010] The technical problem to be solved by the present utility model is realized through the following technical solutions. The present utility model is a four-axis processing fixture for a composite material launch tube, which includes 2 support flanges for tightening the composite material launch tube from both sides and several support seats for supporting the composite material launch tube from below. At least 2 support bearings for cooperating with the composite material launch tube are installed on the support seats; a mandrel for cooperating with an external machine tool is fixedly installed in the middle of the support flange. Several end stop plates for limiting the composite material launch tube are installed on the circumferential side of the support flange near the mandrel through bolts. Several wedge-shaped sliders for positioning the composite material launch tube are installed on the circumferential side of the support flange far from the mandrel through bolts. A wedge-shaped groove for cooperating with the wedge-shaped slider is provided on the support flange, and a threaded hole is provided in the wedge-shaped groove.

[0011] The technical problem to be solved by the present utility model can also be further realized through the following technical solutions. For the above-mentioned four-axis processing fixture for a composite material launch tube, the support seat is an adjustable support seat with adjustable height.

[0012] The technical problem to be solved by the present utility model can also be further realized through the following technical solutions. For the above-mentioned four-axis processing fixture for a composite material launch tube, there are 2 adjustable support seats.

[0013] The technical problem to be solved by the present utility model can also be further realized through the following technical solutions. For the above-mentioned four-axis processing fixture for a composite material launch tube, 2 support bearings are provided on each support seat, and a supporting gap for cooperating with the composite material launch tube is left between the 2 support bearings.

[0014] The technical problem to be solved by the present utility model can also be further realized through the following technical solutions. For the above-mentioned four-axis processing fixture for a composite material launch tube, the length of the supporting gap is 100 - 200 mm.

[0015] The technical problem to be solved by the present utility model can also be further realized through the following technical solutions. For the above-mentioned four-axis processing fixture for a composite material launch tube, a mandrel end for clamping and cooperating with an external machine tool chuck is provided at one end of the mandrel. The mandrel end is circular or square. The diameter of the mandrel is 120 - 200 mm, and the length of the mandrel is 500 - 1000 mm.

[0016] The technical problem to be solved by the present utility model can also be further realized by the following technical solutions. For the four-axis processing fixture of the composite material launcher tube described above, 4 - 16 end stop plates are provided, and each end stop plate is installed on the support flange through 2 bolts.

[0017] The technical problem to be solved by the present utility model can also be further realized by the following technical solutions. For the four-axis processing fixture of the composite material launcher tube described above, 4 - 16 wedge-shaped sliders are provided, and each wedge-shaped slider is installed on the support flange through an internal hexagonal bolt.

[0018] The technical problem to be solved by the present utility model can also be further realized by the following technical solutions. For the four-axis processing fixture of the composite material launcher tube described above, the threaded hole in the wedge-shaped groove is an enlarged hole for a U-shaped screw, and the length of the enlarged hole for the U-shaped screw is 0 - 5 mm greater than the diameter of the bolt connecting the wedge-shaped slider.

[0019] The technical problem to be solved by the present utility model can also be further realized by the following technical solutions. For the four-axis processing fixture of the composite material launcher tube described above, the mandrel, the wedge-shaped slider, the support flange and the end stop plate are all made of metal materials and are selected from any one of carbon steel, stainless steel, copper, aluminum alloy, and titanium alloy. A number of weight-reducing holes are also provided on the support flange.

[0020] Compared with the prior art, the present utility model provides a four-axis processing fixture for a composite material launcher tube. Through this fixture, the processing of all outer surfaces of the composite material launcher tube can be realized, and the problems of product deformation, processing interference, difficult positioning, and affecting production efficiency caused by the traditional clamping method are well solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is an exploded view of the structure of the support flange of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Refer toFigure 1-2 , a four-axis processing fixture for a composite material launch tube, comprising two support flanges 3 for tightening the composite material launch tube from both sides and several support seats 5 for supporting the composite material launch tube from below. Specifically:

[0025] A mandrel 1 for cooperating with an external machine tool is fixedly installed in the middle of the support flange 3 to clamp the support flange 3 on the machine tool. At one end of the mandrel 1, there is a mandrel end for clamping and cooperating with the chuck of the external machine tool. The mandrel end can be processed into a circular shape for convenient clamping by the three-jaw chuck of the machine tool; it can also be processed into a square shape for convenient clamping by the four-jaw chuck of the machine tool. Adjust the connection structure according to the machine tool structure. The diameter of the mandrel 1 ranges from 120 to 200 mm, and the length ranges from 500 to 1000 mm. At the same time, the mating end of the mandrel 1 and the support flange 3 can be a circular fit or a square fit, as long as the mating accuracy between the mandrel 1 and the support flange 3 is ensured. At the same time, an opening or groove 7 for mating with the mandrel 1 is provided in the middle of the support flange 3;

[0026] Several end stop plates 4 for limiting the composite material launch tube are installed on the circumference of the support flange 3 near one side of the mandrel 1 by bolts to limit the support flange 3 after the composite material launch tube is sleeved on the support flange 3 to prevent it from moving during the processing. Preferably, 4 - 16 end stop plates 4 are provided, and the 4 - 16 end stop plates 4 are evenly distributed along the circumference of the support flange 3. Each end stop plate 4 is installed on the support flange 3 by 2 bolts.

[0027] In order to achieve the tight fixing of the composite material launcher tube, a number of wedge-shaped sliders 2 for positioning the composite material launcher tube are installed on the circumferential side of the support flange 3 on the side away from the mandrel 1 through bolts. A wedge-shaped groove 8 cooperating with the wedge-shaped slider 2 is provided on the support flange 3, and threaded holes are provided in the wedge-shaped groove 8. The wedge-shaped slider 2 is installed on the support flange 3 by cooperating with the wedge-shaped groove 8, and a sliding fit clearance is adopted. When fixing the composite material launcher tube, the wedge-shaped slider 2 moves outward along the wedge-shaped groove 8 until the surface of the wedge-shaped slider 2 is higher than the support flange 3, so as to gradually lock the composite material launcher tube and complete the clamping; after the processing is completed, the wedge-shaped slider 2 moves inward along the wedge-shaped groove 8 until the surface of the wedge-shaped slider 2 is lower than the support flange 3, thereby loosening the composite material launcher tube; preferably, 4 - 16 wedge-shaped sliders 2 are provided, and the 4 - 16 wedge-shaped sliders 2 are evenly distributed along the circumferential side of the support flange 3. Each wedge-shaped slider 2 is installed on the support flange 3 through an internal hexagonal bolt 6; the threaded holes in the wedge-shaped groove 8 are used to fix the wedge block and adjust the position of the wedge-shaped slider 2. Preferably, the threaded holes in the wedge-shaped groove 8 are U-shaped screw reaming holes 9, that is, waist-shaped threaded holes. The length of the U-shaped screw reaming hole 9 is 0 - 5 mm greater than the diameter of the bolt connecting the wedge-shaped slider 2, so that the internal hexagonal bolt 6 can move and adjust within a small range along the U-shaped screw reaming hole 9, thereby realizing the movement adjustment of the wedge-shaped slider. The adjustment range of the wedge-shaped slider 2 is 0 - 5 mm.

[0028] The support seat 5 is used at the middle position of the composite material launcher tube to support the composite material launcher tube and prevent the risk of deformation of the composite material launcher tube under the pressure of the tool during processing. Preferably, 2 adjustment support seats 5 are provided. At least 2 support bearings 10 for cooperating with the composite material launcher tube are installed on each support seat 5 to better cooperate with the support and rotation of the composite material launcher tube. Preferably, 2 support bearings 10 are provided on each support seat 5, and a support gap for cooperating with the composite material launcher tube is left between the 2 support bearings 10. During actual use, the size of the support bearing 10 and the support gap can be set according to the actual situation to facilitate meeting composite material launcher tubes of different diameters. The size range of the support bearing 10 is 60 - 120 mm, and the size range of its support gap is 100 - 200 mm;

[0029] Secondly, the support seat 5 adopts an adjustable support seat 5 in the prior art, generally including a base, an adjustment bolt 11 and a support column and other structures, and can be adjusted in height by using the adjustment bolt 11 to facilitate the use of composite material launcher tubes of different sizes. The adjustable range is 0 - 60 mm.

[0030] In actual use, the mandrel 1, the wedge-shaped slider 2, the support flange 3 and the end stop plate 4 are all made of metal and selected from any one of carbon steel, stainless steel, copper, aluminum alloy and titanium alloy, which are strong and reliable. At the same time, while ensuring the strength, a number of weight-reducing holes 12 are provided on the support flange 3 to reduce the weight as much as possible and facilitate the later clamping operation.

[0031] Through the four-axis processing fixture for the composite material launcher provided by the utility model, the processing of all outer surfaces of the composite material launcher can be realized, and the problems of product deformation, processing interference, positioning difficulty and influence on production efficiency caused by the traditional clamping method are well solved. The specific clamping process is as follows:

[0032] First, the support flange 3 is installed on the mandrel 1 and then welded into one body. Then, the position of the end stop plate 4 is fixed with bolts. After that, the wedge-shaped sliders 2 are respectively installed in the wedge-shaped grooves 8 of the support flange 3 and fixed with bolts;

[0033] Next, the composite material launcher to be processed is sleeved on the support flange 3, and the wedge-shaped sliders 2 are pulled outward along the wedge-shaped grooves 8 by bolts until the wedge-shaped sliders 2 tighten the composite material launcher;

[0034] Finally, the height of the support seat 5 is adjusted to ensure that the support bearing 10 on the support seat 5 can just support the composite material launcher from below, and the clamping of the composite material launcher can be completed.

Claims

1. A four-axis machining fixture for a composite material launch tube, characterized in that: It comprises two supporting flanges for tightening the composite material launch tube from both sides and several supporting seats for supporting the composite material launch tube from below, at least two supporting bearings for cooperating with the composite material launch tube are installed on the supporting seats; a core shaft for cooperating with an external machine tool is fixedly installed in the middle of the supporting flange, several end stop plates for limiting the composite material launch tube are installed by bolts on the peripheral side of the supporting flange close to the core shaft, several wedge-shaped sliders for positioning the composite material launch tube are installed by bolts on the peripheral side of the supporting flange away from the core shaft, a wedge-shaped groove cooperating with the wedge-shaped slider is arranged on the supporting flange, and a threaded hole is arranged in the wedge-shaped groove.

2. The four-axis machining jig for the composite material launch tube according to claim 1 is characterized in that: The support seat is an adjustable support seat with adjustable height.

3. The four-axis machining jig for the composite material launch tube according to claim 2 is characterized in that: The adjustable support seats are provided with two.

4. The four-axis machining jig for the composite material launch tube according to claim 1 or 2, characterized in that: There are two support bearings on each support seat, and a supporting gap is left between the two support bearings to cooperate with the composite material launch tube.

5. The four-axis machining jig for the composite material launch tube according to claim 4 is characterized in that: The length of the supporting gap is 100-200 mm.

6. The four-axis machining jig for composite material launch tube according to claim 1, characterized in that: A mandrel end for clamping with an external machine tool chuck is arranged at one end of the mandrel. The mandrel end is round or square, the diameter of the mandrel is 120-200mm, and the length of the mandrel is 500-1000mm.

7. The four-axis machining jig for composite material launch tube according to claim 1, characterized in that: There are 4 to 16 end stop plates, and each end stop plate is mounted on the supporting flange by two bolts.

8. The four-axis machining jig for composite material launch tube according to claim 1 or 7, characterized in that: There are 4 to 16 wedge-shaped sliding blocks, and each wedge-shaped sliding block is installed on the supporting flange through a hexagon socket bolt.

9. The four-axis machining jig for composite material launch tube according to claim 1, characterized in that: The threaded hole in the wedge-shaped groove is a U-shaped screw enlarged hole, and the length of the U-shaped screw enlarged hole is greater than the diameter of the bolt connecting the wedge-shaped sliding block by 0-5mm.

10. The four-axis machining jig for composite material launch tube according to claim 1, characterized in that: The core shaft, wedge-shaped slider, support flange and end stop plate are all made of metal and are selected from any one of carbon steel, stainless steel, copper, aluminum alloy and titanium alloy. A plurality of weight-reducing holes are also arranged on the support flange.

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