A welding positioning device and forming method for forming training missiles.

Abstract

This invention discloses a welding positioning device and its forming method for training missiles. The welding positioning device includes: a missile body welding fixture, a pouring fixture, a tail fin welding fixture, and two centers. Each of the two centers consists of a frustum and a round rod coaxially fixed to the large-diameter end of the frustum. The two centers are respectively used to hold the inner hole of the missile body's central tube and the positioning sleeve. The missile body welding fixture is used to weld and position the missile head and cylindrical section, and the missile head and mounting sleeve. The pouring fixture is used for pouring and forming concrete inside the conical section of the missile body. The tail fin welding fixture is used to weld and position the tail fin and the conical section, and to ensure the relative angle between the tail fin blades and the positional relationship between the blades and the missile body axis. This invention can ensure the welding quality and welding accuracy of the training missile, thereby ensuring coaxiality, symmetry, and straightness.

Description

Technical Field

[0001] This invention belongs to the field of welding forming technology, specifically relating to a welding positioning device and forming method for forming training missiles. Background Technology

[0002] To accurately assess the effectiveness of combat strikes and meet the requirements of realistic training, the design and production of training bombs have relatively high requirements for all dimensions and weights.

[0003] Welding technology plays a crucial role in the formation process of training missiles. Training missiles have a unique streamlined aerodynamic shape, and the quality control of component welding is quite difficult. Current technology lacks suitable welding positioning fixtures, which cannot effectively guarantee welding quality and accuracy, ensure coaxiality, symmetry and straightness, and easily lead to welding failure. Summary of the Invention

[0004] In view of this, the present invention provides a welding positioning device and a forming method for forming training missiles, which can ensure the welding quality and welding accuracy of training missiles, thereby ensuring coaxiality, symmetry and straightness.

[0005] This invention is achieved through the following technical solution:

[0006] A welding positioning device for forming training missiles, the device comprising: a missile body welding fixture, a pouring fixture, a tail fin welding fixture, and two centers;

[0007] Both of the aforementioned centers consist of a frustum and a round rod coaxially fixed to the large-diameter end of the frustum; the two centers are respectively used to hold the inner hole of the projectile's central tube and the positioning sleeve.

[0008] The projectile welding fixture is used for welding and positioning the projectile head and cylindrical section, and the projectile head and mounting sleeve.

[0009] The grouting fixture is used for grouting and molding concrete inside the cone section of the projectile.

[0010] The tail fin welding fixture is used to weld and position the tail fin and the cone section, and to ensure the relative angle between the tail fin blades and the positional relationship between the blades and the projectile axis.

[0011] Furthermore, the projectile welding fixture includes a head fixture and an inner hole fixture;

[0012] The head tooling includes: a conical sleeve, a connecting ring, a positioning ring, and a connecting post;

[0013] The connecting ring and the positioning ring are arranged coaxially opposite each other, and the connecting ring and the positioning ring are connected by three or more connecting posts, which are evenly distributed along the circumferential direction.

[0014] The inner circumferential surface of the connecting ring is a conical surface, and the inner circumferential surface of the positioning ring is an arc surface. The arc surface of the positioning ring can fit against the outer circumferential surface of the head of the projectile.

[0015] The cone angle of the cone sleeve is equal to the cone angle of the conical surface of the connecting ring, and the cone sleeve is coaxially mounted on the inner circumferential surface of the connecting ring.

[0016] The inner hole tooling includes: a flower-shaped disc one, a flower-shaped disc two, and an inner tube;

[0017] Flower-shaped disc one and flower-shaped disc two are coaxially installed at both ends of the inner tube;

[0018] The outer circumferential surface of the flower-shaped disk is machined with a stepped surface, which divides the flower-shaped disk into two outer diameter sections, namely a large diameter section and a small diameter section. The outer diameter of the small diameter end is equal to the inner diameter of the cylindrical section of the projectile. Several threaded holes are machined evenly distributed along the circumference on the stepped surface of the flower-shaped disk.

[0019] The end face of the second flower-shaped disc is integrally formed with a cylindrical structure, which is located on the end face away from the first flower-shaped disc. The outer circumference of the second flower-shaped disc is evenly distributed with several notches. The outer diameter of the second flower-shaped disc is equal to the inner diameter of the cylindrical section of the projectile, and the outer diameter of the cylindrical structure is smaller than the outer diameter of the second flower-shaped disc, and can abut against the inner wall of the head of the projectile.

[0020] Furthermore, the tail fin welding fixture includes: a welding base, a mandrel, and a limiting sleeve.

[0021] The welding base includes a base plate one, a base plate two, a column, a vertical plate, and a positioning sleeve;

[0022] The second base plate and the vertical plate are arranged opposite to each other, and the second base plate and the vertical plate are connected as one unit by four or more columns;

[0023] The first base plate is fixed on the second base plate, and the first base plate is located between the second base plate and the upright plate;

[0024] Mounting holes are machined on both the base plate and the upright plate. The two mounting holes are coaxial. Let the mounting hole on the base plate be called mounting hole one, and the mounting hole on the upright plate be called mounting hole two. The inner diameter of mounting hole one is equal to the outer diameter of the cylinder of the tail fin. The inner diameter of mounting hole two is larger than the inner diameter of mounting hole one. The inner wall surface of both mounting holes is machined with several notches and grooves with the same shape as the bend of the tail fin. Each notch and groove on the mounting hole corresponds to tail fin one.

[0025] The positioning sleeve is coaxially located in the mounting hole one and fixed on the base plate two; the mandrel is calibrated with the positioning sleeve hole, the positioning sleeve is used for positioning the mandrel, and the mandrel is used for positioning the welding of the tail fin and the cone section;

[0026] The limiting sleeve is coaxially located inside the mounting hole one and is fixed to the base plate two by welding; the outer diameter of the limiting sleeve is equal to the inner diameter of the circle formed by the inner sides of all the winglets, which is used to prevent the tail wing from welding deformation.

[0027] Furthermore, the pouring fixture includes: a pouring mold, a hopper, and a handle;

[0028] The inner cavity of the casting mold is shaped to match the cone section of the projectile, and is used for pouring and molding concrete inside the cone section. The hopper is fixed at the entrance end of the casting mold, and the two handles are fixed to the outer wall of the casting mold.

[0029] A method for forming an aerial training missile, the specific steps of which are as follows:

[0030] Step one: process each component that makes up the training missile, namely, process the missile body, the missile lugs, and the tail fins;

[0031] Step two: Use two centers to coaxially align the mounting sleeve with the central tube and weld them together.

[0032] Step 3: Weld the head of the projectile to the cylindrical section and the head of the projectile to the mounting sleeve as a single unit using the projectile welding fixture;

[0033] Step 4: Pour concrete into the cylindrical section of the projectile, and pour concrete with the same shape as the inner cavity of the conical section into the end of the cylindrical section using a pouring tool, and then let it solidify and take shape.

[0034] Step 5: Weld the conical section of the projectile to the cylindrical section and the conical section to the central tube together using two tipped electrodes;

[0035] Step 6: Weld the tail fins of the missile body to the cone section as one piece using a tail fin welding fixture;

[0036] Step 7: Secure the lugs to the projectile body using bolts;

[0037] Step 8: Install the smoke tube and firing pin when using.

[0038] Furthermore, in step two, the mounting sleeve is coaxially connected with the central tube, and after the two centers are respectively pressed against the inner holes of the mounting sleeve and the central tube, the joint between the mounting sleeve and the central tube is welded together; the two centers are called center one and center two.

[0039] When the first tip abuts against the inner hole of the mounting sleeve, the small-diameter end of the first tip extends into the inner hole of the mounting sleeve, and the frustum-shaped outer circumferential surface of the first tip abuts against the end of the mounting sleeve; when the second tip abuts against the inner hole of the central tube, the small-diameter end of the second tip extends into the inner hole of the central tube, and the frustum-shaped outer circumferential surface of the second tip abuts against the end of the central tube.

[0040] Furthermore, in step three, firstly, remove the tip one, then coaxially fit the head onto the outside of the mounting sleeve, and then install the head tooling and the tip one. The axis of the head tooling coincides with the center line of the projectile, the positioning ring is coaxially fitted on the outer circumferential surface of the head, and the connecting ring is coaxially fitted on the outer circumferential surface of the tip one.

[0041] Then, after the cylindrical section is connected to the head, the inner hole tooling is installed inside the cylindrical section. The end of the cylindrical structure of the second flower-shaped plate is stuck inside the head, and the stepped surface of the first flower-shaped plate abuts against the end face of the cylindrical section, pressing the connection between the cylindrical section and the head tightly. At the same time, the inner tube is coaxially fitted outside the central tube.

[0042] Then, under the combined action of the projectile welding fixture and the two centers, spot welding is performed at the joint between the head and the cylindrical section, spot welding is performed at the joint between the head and the mounting sleeve, and the projectile welding fixture is used to calibrate the circle to ensure the coaxiality of component one and component two. After the circle calibration is completed, the two spot welds are fully welded, and the welding slag is removed after the welding is completed.

[0043] Finally, after the welding has cooled, the two tops and the projectile welding fixtures are removed. When removing the inner hole fixture, screws are screwed into the threaded hole. After the end of the screw abuts against the end face of the cylindrical section, the screws are screwed in. The screws push the cylindrical section away from the step surface, thus separating the cylindrical section from the flower-shaped disc and removing the inner hole fixture.

[0044] Furthermore, in step four, concrete is poured into the annular cavity formed by the cylindrical section and the central pipe. When the concrete is poured to the end of the cylindrical section, the pouring fixture is installed on the cylindrical section.

[0045] The axis of the injection fixture coincides with the axis of the projectile. The casting mold is coaxially sleeved on the outer circumferential surface of the cylindrical section. At this time, the end of the central tube extending out of the cylindrical section is coaxially located inside the casting mold, and the inner wall surface of the casting mold and the outer circumferential surface of the central tube form a casting cavity.

[0046] Concrete is poured into the casting cavity through a hopper and then vibrated and compacted. After the concrete has initially solidified and formed a cone-shaped filling block, the pouring equipment is removed.

[0047] Furthermore, in step five, the conical segment is fastened onto the conical segment filling block and then proceeds to the conical segment welding process: the two centers are used again to hold the mounting sleeve and the inner hole of the central tube together, and the joint between one end of the conical segment and the cylindrical segment, and the other end of the conical segment and the central tube are welded together.

[0048] Furthermore, in step six, the axis of the component completed in the above steps is placed vertically by a hoisting tool, with the head of the projectile facing upwards and the conical section facing downwards. The tail fin welding fixture is placed below the conical section, with the axis of the tail fin welding fixture coinciding with the axis of the projectile. The welding base is placed on a liftable horizontal working platform.

[0049] The tail fin is placed on the welding base, and the cylindrical bottom end of the tail fin is inserted into the mounting hole on the base plate. The tail fin blades abut against the outer circumferential surface of the limiting sleeve. At the same time, each blade is inserted into the notch groove provided on the inner wall of the two mounting holes.

[0050] After the bottom end of the mandrel is coaxially installed in the positioning sleeve, the horizontal working platform is moved upward so that the top end of the mandrel is coaxially installed in the central tube, thereby making the axis of the mandrel coincide with the axis of the projectile; when the horizontal working platform moves upward until the top of the wing touches the outer circumference of the cone section, the horizontal working platform stops moving upward and the wing and the cone section are welded together.

[0051] Beneficial effects:

[0052] (1) The present invention provides a welding positioning device for forming training missiles, which reduces the difficulty of component welding quality control, effectively improves the welding quality and welding accuracy of the missile body, ensures coaxiality, symmetry and straightness, ensures the welding consistency of each training missile, and improves the aerodynamic shape characteristics of the missile body surface.

[0053] (2) In the welding positioning device for forming training missiles provided by the present invention, the outer circumferential surface of the flower-shaped disk of the inner hole tool is evenly distributed with several notches, and the notches can prevent the inner hole tool from being difficult to remove due to welding deformation.

[0054] (3) In the welding positioning device for forming training missiles provided by the present invention, the outer diameter of the limiting sleeve of the tail fin welding fixture is equal to the inner diameter of the circle formed by the inner sides of all the fins, which can prevent the tail fin from welding deformation.

[0055] (4) The present invention provides a method for forming a training missile. This method is mature, low in cost, and easy to operate. It reduces the difficulty of controlling the welding quality of components, effectively improves the welding quality and precision of the missile body, and ensures coaxiality, symmetry and straightness. It is of great significance for troops to accurately assess the combat strike effect and meet the requirements of combat training.

[0056] (5) In the method for forming a training missile provided by the present invention, the inner hole tooling has threaded holes evenly distributed along the circumference on the stepped surface of the flower-shaped disk one. When removing the inner hole tooling, screws are screwed into the threaded holes. After the end of the screws abuts against the end face of the cylindrical section, the screws are screwed in. The screws push the cylindrical section to move away from the stepped surface, thereby separating the cylindrical section from the flower-shaped disk one and removing the inner hole tooling. Therefore, the inner hole tooling can be removed smoothly through the threaded holes.

[0057] (6) In the forming method of the training missile provided by the present invention, the inner wall surfaces of the two mounting holes on the tail fin welding fixture are each machined with a number of notches and grooves with the same shape as the tail fin bending point, and each wing piece is correspondingly inserted into the notches and grooves provided on the inner wall surfaces of the two mounting holes; the notches and grooves can ensure the relative angle between the tail fin wing pieces and the positional relationship between the wing pieces and the missile body axis. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the overall structure of the training missile.

[0059] Figure 2 A schematic diagram of the welding of the central tube and the positioning sleeve;

[0060] Figure 3 This is a schematic diagram of the welding fixture structure for the projectile body;

[0061] Figure 4 This is a sectional view of the projectile welding fixture structure;

[0062] Figure 5 This is a structural schematic diagram of an internal hole tooling;

[0063] Figure 6 This is a schematic diagram of the pouring tooling in use;

[0064] Figure 7 This is a schematic diagram of the pouring fixture.

[0065] Figure 8 Schematic diagram of the tail fin welding fixture;

[0066] Figure 9 This is a schematic diagram of the welding base structure;

[0067] Among them, 1-projectile body welding fixture, 11-head fixture, 111-conical sleeve, 112-washer, 113-connecting ring, 114-positioning ring, 115-connecting column, 12-inner hole fixture, 121-flower-shaped disc one, 122-flower-shaped disc two, 123-inner tube, 124-step surface, 125-notch, 126-threaded hole, 2-pouring fixture, 21-casting mold, 22-hopper, 23-handle, 3-tail fin welding fixture, 31-welding base, 32-mandrel, 33-limiting sleeve, 311-base plate one 312-Base Plate II, 313-Column, 314-Upright Plate, 315-Positioning Sleeve, 316-Groove, 317-Notch, 4-Top Point I, 5-Top Point II, 6-Training Bomb, 61-Bomb Body, 62-Bomb Ear, 63-Tail Fin, 64-Firing Pin, 611-Head, 612-Mounting Sleeve, 613-Center Tube, 614-Cylindrical Section, 615-Conical Section, 616-Bomb Hook, 617-Hoop Ring, 618-Hoop Ring Reinforcing Plate, 619-Bolt, 620-Nut, 631-Flange, 632-Cylinder. Detailed Implementation

[0068] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0069] Example 1:

[0070] This embodiment provides a training missile; see appendix. Figure 1 The training bomb 6 adopts a sealed structure with a steel outer shell and an internal concrete filling method. The internal concrete is physically isolated from the external environment. The training bomb 6 includes a bomb body 61, a lug 62, a tail fin 63, a firing pin 64, and a smoke tube. The tail fin 63 is installed at the tail of the bomb body 61, the firing pin 64 is installed at the head of the bomb body 61, and the lug 62 is installed on the outer wall of the bomb body 61. The smoke tube is installed inside the bomb body 61 and can be triggered and ignited by the firing pin 64.

[0071] The projectile 61 includes a head 611, a mounting sleeve 612, a central tube 613, a cylindrical section 614, and a conical section 615. The head 611 and the conical section 615 are respectively mounted at both ends of the cylindrical section 614. The central tube 613 is coaxially mounted inside the cylindrical section 614 and the conical section 615, with one end of the central tube 613 flush with the end of the conical section 615. The mounting sleeve 612 coaxially passes through the head 611 and is coaxially connected to the central tube 613. The mounting sleeve 612 is used to mount the firing pin 64, and a smoke tube is installed inside the central tube 613.

[0072] The spring lug 62 includes a spring hook 616, a hoop 617, a hoop reinforcing plate 618, a bolt 619, and a nut 620; the hoop 617 is fitted onto the outer circumference of the cylindrical section 614, the hoop reinforcing plate 618 is fixed to the hoop 617 by the bolt 619 and the nut 620, and the spring hook 616 is fixed to the hoop 617;

[0073] The tail fin 63 includes winglets 631 and a cylinder 632. One end of two or more winglets 631 is evenly distributed along the circumference of the cylinder 632 and fixed to the outer circumferential surface of the cylinder 632. The other end of two or more winglets 631 is evenly distributed along the circumference of the conical segment 615 and fixed to the outer circumferential surface of the conical segment 615. In this embodiment, there are four winglets 631.

[0074] The firing pin 64 includes a movable firing pin and a safety pin; both the movable firing pin and the safety pin are mounted on the head 611 via a mounting sleeve 612.

[0075] Example 2:

[0076] Based on Embodiment 1, this embodiment provides a welding positioning device for forming training missiles. The device includes: a missile body welding fixture 1, a pouring fixture 2, a tail fin welding fixture 3, and two centers.

[0077] See appendix Figure 2 The two centers are designated as Center 1 (4) and Center 2 (5). The two centers have the same structure, consisting of a frustum and a round rod coaxially fixed to the large-diameter end of the frustum. The two centers are used to hold the inner holes of the central tube and the positioning sleeve, respectively.

[0078] See appendix Figure 3 The projectile welding fixture 1 is used to weld and position the head 611 of the projectile 61 to the cylindrical section 614 and the head 611 of the projectile 61 to the mounting sleeve 612, and includes a head fixture 11 and an inner hole fixture 12.

[0079] See appendix Figure 4 The head tooling 11 includes: a conical sleeve 111, a washer 112, a connecting ring 113, a positioning ring 114, and a connecting post 115;

[0080] The connecting ring 113 and the positioning ring 114 are arranged coaxially opposite each other, and the connecting ring 113 and the positioning ring 114 are connected by three or more connecting posts 115. The three or more connecting posts 115 are evenly distributed along the circumferential direction. In this embodiment, three connecting posts 115 are used. One end of the connecting post 115 is fixedly connected to the connecting ring 113 by a screw, and the other end of the connecting post 115 is connected to the positioning ring 114 by a thread to form a whole.

[0081] The inner circumferential surface of the connecting ring 113 is a conical surface, and the inner circumferential surface of the positioning ring 114 is an arc surface. The arc surface of the positioning ring 114 can fit against the outer circumferential surface of the head 611 of the projectile 61.

[0082] The cone angle of the cone sleeve 111 is equal to the cone angle of the conical surface of the connecting ring 113, and the cone sleeve 111 is coaxially mounted on the inner circumferential surface of the connecting ring 113; wherein, the outer circumferential surface of the large diameter end of the cone sleeve 111 is machined with an annular boss; the annular boss abuts against the end face of the connecting ring 113 through a washer 112.

[0083] See appendix Figure 4 and Figure 5 The inner hole tooling 12 includes: a flower-shaped disc 121, a flower-shaped disc 122, and an inner tube 123;

[0084] Flower-shaped disc 121 and flower-shaped disc 22 are coaxially mounted at both ends of the inner tube 123, and the inner tube 123 is threadedly connected to flower-shaped disc 121 and flower-shaped disc 222 as a whole;

[0085] The flower-shaped disk 121 has a stepped surface 124 machined on its outer circumference, which divides it into two outer diameter sections: a large diameter section and a small diameter section. The outer diameter of the small diameter section is equal to the inner diameter of the cylindrical section 614 of the projectile 61. Four threaded holes 126 are evenly distributed around the circumference on the stepped surface 124 of the flower-shaped disk 121. These threaded holes 126 are used to prevent welding deformation from making it difficult to remove the inner hole fixture 12. The inner hole fixture 12 can be easily removed through the threaded holes 126. Several weight-reducing holes are provided on the end face of the flower-shaped disk 121.

[0086] The end face of the second flower-shaped disk 122 is integrally formed with a cylindrical structure, which is located on the end face away from the first flower-shaped disk 121. The end face of the second flower-shaped disk 122 is provided with several weight-reducing holes. The outer circumferential surface of the second flower-shaped disk 122 is evenly distributed with several notches 125, which are provided to prevent the inner hole tooling 12 from being difficult to remove due to welding deformation. The outer diameter of the second flower-shaped disk 122 is equal to the inner diameter of the cylindrical section 614 of the projectile 61. The outer diameter of the cylindrical structure is smaller than the outer diameter of the second flower-shaped disk 122 and can abut against the inner wall surface of the head 611 of the projectile 61.

[0087] See appendix Figure 6 and Figure 7 The pouring fixture 2 is used for pouring and molding the concrete inside the cone section 615. The cone section 615 can only be welded after the concrete pouring is completed. The pouring fixture 2 includes: a pouring mold 21, a hopper 22 and a handle 23.

[0088] The inner cavity of the casting mold 21 is shaped to match the cone section 615 of the projectile, and is used for pouring and molding concrete inside the cone section 615. The hopper 22 is fixed at the inlet end of the casting mold 21, and the two handles 23 are fixed to the outer wall of the casting mold 21.

[0089] See appendix Figure 8 and Figure 9 The tail fin welding fixture 3 is used to weld and position the tail fin 63 and the cone section 615, and to ensure the relative angle between the fins 631 of the tail fin 63 and the positional relationship between the fins 631 and the axis of the projectile body 61. It includes: a welding base 31, a mandrel 32, and a limiting sleeve 33.

[0090] The welding base 31 includes a base plate 311, a base plate 312, a column 313, a vertical plate 314, and a positioning sleeve 315;

[0091] The base plate 312 and the upright plate 314 are arranged opposite to each other, and the base plate 312 and the upright plate 314 are connected as one unit by four or more uprights 313. One end of each upright 313 is threaded to the base plate 312, and the other end of the upright 313 is fixedly connected to the upright plate 314 by nuts and washers. The upright 313 has a groove 316 in the middle to facilitate manual operation and assist in tightening. This embodiment uses four uprights 313.

[0092] The base plate 311 is fixed to the base plate 312 by screws, and the base plate 311 is located between the base plate 312 and the upright plate 314. The four corners of the base plate 311 pass through the four uprights 313 respectively.

[0093] Mounting holes are machined on both the base plate 311 and the vertical plate 314. The two mounting holes are coaxial. Let the mounting hole on the base plate 311 be called mounting hole one, and the mounting hole on the vertical plate 314 be called mounting hole two. The inner diameter of mounting hole one is equal to the outer diameter of the cylinder 632 of the tail fin 63. The inner diameter of mounting hole two is larger than the inner diameter of mounting hole one. The inner wall surface of both mounting holes is machined with several notches 317 with the same shape as the bend of the tail fin 63. Each notch 317 on the mounting hole corresponds to the tail fin 63 one by one.

[0094] The positioning sleeve 315 is coaxially located in the mounting hole and fixed on the base plate 312; the mandrel 32 is calibrated with the hole of the positioning sleeve 315, the positioning sleeve 315 is used for positioning the mandrel 32, and the mandrel 32 is used for positioning the welding of the tail fin 63 and the cone section 615.

[0095] The limiting sleeve 33 is coaxially located in the mounting hole and is fixed to the base plate 312 by welding. The outer diameter of the limiting sleeve 33 is equal to the inner diameter of the circle formed by the inner sides of all the winglets 631, which is used to prevent the tail wing 63 from being deformed during welding.

[0096] Example 3:

[0097] Based on Embodiments 1 and 2, this embodiment provides a method for forming a training missile. The specific steps of this method are as follows:

[0098] Step 1: Process each component that makes up the training missile 6, namely, process the missile body 61, process the missile lugs 62, and process the tail fins 63. Among them, the firing pin 64 and the smoke tube are finished parts and do not need to be processed.

[0099] Step 2: Connect the mounting sleeve 612 and the central tube 613 coaxially using two centers and weld them together to form component one;

[0100] Step 3: The head 611 of the projectile 61 is welded to the cylindrical section 614 and the head 611 of the projectile 61 is welded to the mounting sleeve 612 by the projectile welding fixture 1 to form component 2.

[0101] Step 4: Pour concrete into the cylindrical section 614 of the projectile 61, and pour concrete with the same shape as the inner cavity of the conical section 615 into the end of the cylindrical section 614 through the pouring tool 2, and then solidify and shape it.

[0102] Step 5: Weld the conical segment 615 of the projectile 61 to the cylindrical segment 614 and the conical segment 615 to the central tube 613 together using two tipped electrodes to form component three;

[0103] Step six: The tail fin 63 of the missile body 61 is welded to the cone section 615 by the tail fin welding fixture 3 to form component four.

[0104] Step 7: Secure the lug 62 to the projectile body 61 with bolts;

[0105] Step 8: Install the smoke tube and firing pin 64 when using.

[0106] Furthermore, in step one, the components of the training missile 6 are made entirely of steel. The head 611 is made by stretching sheet metal and then punching a hole in the center; the mounting sleeve 612 is machined from bar stock; the central tube 613 is made of cold-drawn tubing; the cylindrical section 614 is made of cold-drawn steel pipe; the conical section 615 is made by secondary stretching of sheet metal and then punching a hole in the center; the lug 62 is a ring-shaped component made of 30CrMnSi material; the hook 616 is formed by drawing round steel and then stamping it with a die; the hoop 617 and the hoop reinforcement plate 618 are bent parts; the hook 616 and the hoop 617 are welded together; the wing 631 is a stamped part with flanges on both sides and a pleated edge pressed in the center to improve the aerodynamic shape and increase the rigidity of the wing 631; there are four wing 631s, symmetrically distributed around the center line of the cylinder 632; the cylinder 632 is made of cold-drawn steel pipe.

[0107] In step two, the mounting sleeve 612 and the central tube 613 are coaxially connected, and after the two centers are respectively pressed against the inner holes of the mounting sleeve 612 and the central tube 613, the joint of the mounting sleeve 612 and the central tube 613 is welded together; wherein, when the first center 4 is pressed against the inner hole of the mounting sleeve 612, the small diameter end of the first center 4 extends into the inner hole of the mounting sleeve 612, and the frustum-shaped outer circumferential surface of the first center 4 abuts against the end of the mounting sleeve 612; similarly, when the second center 5 is pressed against the inner hole of the central tube 613, the small diameter end of the second center 5 extends into the inner hole of the central tube 613, and the frustum-shaped outer circumferential surface of the second center 5 abuts against the end of the central tube 613;

[0108] In step three, firstly, remove the tip 4, then coaxially fit the head 611 onto the outside of the mounting sleeve 612, and then install the head tooling 11 and the tip 4. The axis of the head tooling 11 coincides with the center line of the projectile 61, the positioning ring 114 is coaxially fitted on the outer circumferential surface of the head 611, and the connecting ring 113 is coaxially fitted on the outer circumferential surface of the tip 4.

[0109] Then, after the cylindrical section 614 is connected to the head 611, the inner hole tool 12 is installed inside the cylindrical section 614. The end of the cylindrical structure of the second flower-shaped disk 122 is stuck inside the head 611, and the stepped surface 124 of the first flower-shaped disk 121 abuts against the end face of the cylindrical section 614, pressing the connection between the cylindrical section 614 and the head 611. At the same time, the inner tube 123 is coaxially fitted outside the central tube 613.

[0110] Then, under the combined action of the projectile welding fixture 1 and the two centers, spot welding is performed at the joint between the head 611 and the cylindrical section 614, and spot welding is performed at the joint between the head 611 and the mounting sleeve 612. The projectile welding fixture 1 is used to calibrate the roundness to ensure the coaxiality of component one and component two. After the roundness calibration is completed, the two spot welds are fully welded. After the welding is completed, the weld slag is removed and the weld is beautified.

[0111] Finally, after the welding has cooled, the two tops and the projectile welding fixture 1 are removed; when removing the inner hole fixture 12, screws are screwed into the threaded hole 126. After the end of the screw abuts against the end face of the cylindrical section 614, the screws are screwed in. The threaded hole 126 and the screw assist the cylindrical section 614 and the inner hole fixture 12 to move in opposite directions. That is, the screw pushes the cylindrical section 614 to move away from the step surface 124, thereby separating the cylindrical section 614 from the flower-shaped disk 121 and removing the inner hole fixture 12.

[0112] In step four, concrete is poured into the annular cavity formed by the cylindrical section 614 and the central tube 613. When the concrete is poured to the end of the cylindrical section 614, the pouring fixture 2 is installed on the cylindrical section 614.

[0113] The axis of the injection fixture 2 coincides with the axis of the projectile 61. The casting mold 21 is coaxially sleeved on the outer circumferential surface of the cylindrical section 614. At this time, the end of the central tube 613 extending out of the cylindrical section 614 is coaxially located inside the casting mold 21, and the inner wall surface of the casting mold 21 and the outer circumferential surface of the central tube 613 form a casting cavity.

[0114] Concrete is poured into the casting cavity through hopper 22 and the concrete is vibrated and compacted. After the concrete has initially solidified to form a cone-shaped filling block, the pouring fixture 2 is removed.

[0115] In step five, the conical segment 615 is fastened onto the conical segment filler block, and the welding process of the conical segment 615 begins: the two centers are used again to hold the inner hole of the mounting sleeve 612 and the central tube 613 together, and the joint between one end of the conical segment 615 and the cylindrical segment 614, and the other end of the conical segment 615 and the central tube 613 are welded together.

[0116] In step six, the axis of component three completed in the above steps is placed vertically using a hoisting tool, with the head 611 of the projectile 61 facing upwards and the cone 615 facing downwards. The tail fin welding fixture 3 is placed below the cone 615, with the axis of the tail fin welding fixture 3 coinciding with the axis of the projectile 61. The welding base 31 is placed on a liftable horizontal working platform.

[0117] The tail fin 63 is placed on the welding base 31, and the bottom end of the cylindrical 632 of the tail fin 63 is inserted into the mounting hole 1 on the base plate 311. The wing pieces 631 of the tail fin 63 abut against the outer circumferential surface of the limiting sleeve 33. At the same time, each wing piece 631 is inserted into the notch groove 317 provided on the inner wall of the two mounting holes to ensure the relative angle between the wing pieces 631 and the positional relationship between the wing pieces 631 and the axis of the projectile 61.

[0118] After the bottom end of the mandrel 32 is coaxially installed in the positioning sleeve 315, the horizontal working platform is moved upward so that the top end of the mandrel 32 is coaxially installed in the central tube 613, thereby making the axis of the mandrel 32 coincide with the axis of the projectile 61; when the horizontal working platform moves upward until the top of the wing 631 abuts against the outer circumference of the cone section 615, the horizontal working platform stops moving upward and welds the wing 631 and the cone section 615 together.

[0119] In step eight, during use, a smoke tube and a firing pin 64 are installed. The smoke tube is installed inside the central tube 613, and the firing pin 64 is installed at the front end of the training missile 6 and connected to the head 611 via a cotter pin. Upon impact, the movable firing pin will violently strike the safety plate under inertia, deforming the safety plate. The firing pin 64 strikes the smoke tube, causing it to detonate and produce gray smoke, which can assist the ground system in determining the impact point of the training missile. The outer surface of the training missile 6 is coated with an infrared-enhancing coating.

[0120] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A welding positioning device for training bomb forming, characterized in that, The device includes: a projectile body welding fixture, an injection fixture, a tail fin welding fixture, and two top points; Both of the aforementioned centers consist of a frustum and a round rod coaxially fixed to the large-diameter end of the frustum; the two centers are respectively used to hold the inner hole of the projectile's central tube and the positioning sleeve. The projectile welding fixture is used for welding and positioning the projectile head and cylindrical section, and the projectile head and mounting sleeve. The grouting fixture is used for grouting and molding concrete inside the cone section of the projectile. The tail fin welding fixture is used to weld and position the tail fin and the cone section, and to ensure the relative angle between the tail fin blades and the positional relationship between the blades and the projectile axis. The projectile welding fixture includes a head fixture and an inner hole fixture; The head tooling includes: a conical sleeve, a connecting ring, a positioning ring, and a connecting post; The connecting ring and the positioning ring are arranged coaxially opposite each other, and the connecting ring and the positioning ring are connected by three or more connecting posts, which are evenly distributed along the circumferential direction. The inner circumferential surface of the connecting ring is a conical surface, and the inner circumferential surface of the positioning ring is an arc surface. The arc surface of the positioning ring can fit against the outer circumferential surface of the head of the projectile. The cone angle of the cone sleeve is equal to the cone angle of the conical surface of the connecting ring, and the cone sleeve is coaxially mounted on the inner circumferential surface of the connecting ring. The inner hole tooling includes: a flower-shaped disc one, a flower-shaped disc two, and an inner tube; Flower-shaped disc one and flower-shaped disc two are coaxially installed at both ends of the inner tube; The outer circumferential surface of the flower-shaped disk is machined with a stepped surface, which divides the flower-shaped disk into two outer diameter sections, namely a large diameter section and a small diameter section. The outer diameter of the small diameter section is equal to the inner diameter of the cylindrical section of the projectile. Several threaded holes are machined evenly distributed along the circumference on the stepped surface of the flower-shaped disk. The end face of the second flower-shaped disc is integrally formed with a cylindrical structure, which is located on the end face away from the first flower-shaped disc. The outer circumference of the second flower-shaped disc is evenly distributed with several notches. The outer diameter of the second flower-shaped disc is equal to the inner diameter of the cylindrical section of the projectile, and the outer diameter of the cylindrical structure is smaller than the outer diameter of the second flower-shaped disc, and can abut against the inner wall of the head of the projectile. The pouring fixture includes: a pouring mold, a hopper, and a handle; The inner cavity of the casting mold is shaped to match the cone section of the projectile, and is used for pouring and molding concrete inside the cone section. The hopper is fixed at the entrance end of the casting mold, and the two handles are fixed to the outer wall of the casting mold.

2. A welding fixture for training bomb forming as claimed in claim 1, wherein, The tail fin welding fixture includes: a welding base, a mandrel, and a limiting sleeve. The welding base includes a base plate one, a base plate two, a column, a vertical plate, and a positioning sleeve; The second base plate and the vertical plate are arranged opposite to each other, and the second base plate and the vertical plate are connected as one unit by four or more columns; The first base plate is fixed on the second base plate, and the first base plate is located between the second base plate and the upright plate; Mounting holes are machined on both the base plate and the upright plate. The two mounting holes are coaxial. Let the mounting hole on the base plate be called mounting hole one, and the mounting hole on the upright plate be called mounting hole two. The inner diameter of mounting hole one is equal to the outer diameter of the cylinder of the tail fin. The inner diameter of mounting hole two is larger than the inner diameter of mounting hole one. The inner wall surface of both mounting holes is machined with several notches and grooves with the same shape as the bend of the tail fin. Each notch and groove on the mounting hole corresponds to tail fin one. The positioning sleeve is coaxially located in the mounting hole one and fixed on the base plate two; the mandrel is calibrated with the positioning sleeve hole, the positioning sleeve is used for positioning the mandrel, and the mandrel is used for positioning the welding of the tail fin and the cone section; The limiting sleeve is coaxially located inside the mounting hole one and is fixed to the base plate two by welding; the outer diameter of the limiting sleeve is equal to the inner diameter of the circle formed by the inner sides of all the winglets, which is used to prevent the tail wing from welding deformation.

3. A method for forming a training bomb, based on a welding positioning device for forming a training bomb according to claim 2, wherein the specific steps of the forming method are as follows: Step one: process each component that makes up the training missile, namely the missile body, the lugs, and the tail fins. Step two: Use two centers to coaxially align the mounting sleeve with the central tube and weld them together to form component one; Step 3: Using a projectile welding fixture, weld the projectile head to the cylindrical section and the projectile head to the mounting sleeve to form component 2. Step 4: Pour concrete into the cylindrical section of the projectile, and pour concrete with the same shape as the inner cavity of the conical section into the end of the cylindrical section using a pouring tool, and then let it solidify and take shape. Step 5: Weld the conical section of the projectile to the cylindrical section and the conical section to the central tube together using two tipped electrodes; Step 6: Weld the tail fins of the missile body to the cone section as one piece using a tail fin welding fixture; Step 7: Secure the lugs to the projectile body using bolts; Step 8: Install the smoke tube and firing pin when using.

4. A method of forming a training bomb as claimed in claim 3 wherein, In step two, the mounting sleeve is coaxially connected with the central tube, and after using two centers to press against the inner holes of the mounting sleeve and the central tube respectively, the joint between the mounting sleeve and the central tube is welded together; the two centers are called center one and center two. When the first tip abuts against the inner hole of the mounting sleeve, the small diameter section of the first tip extends into the inner hole of the mounting sleeve, and the frustum-shaped outer circumferential surface of the first tip abuts against the end of the mounting sleeve; when the second tip abuts against the inner hole of the central tube, the small diameter section of the second tip extends into the inner hole of the central tube, and the frustum-shaped outer circumferential surface of the second tip abuts against the end of the central tube.

5. The method for forming a training bomb as described in claim 4, characterized in that, In step three, firstly, remove the top tip, then coaxially fit the head onto the outside of the mounting sleeve, and then install the head tooling and the top tip. The axis of the head tooling coincides with the center line of the projectile. The positioning ring is coaxially fitted on the outer circumferential surface of the head, and the connecting ring is coaxially fitted on the outer circumferential surface of the top tip. Then, after the cylindrical section is connected to the head, the inner hole tooling is installed inside the cylindrical section. The end of the cylindrical structure of the second flower-shaped plate is stuck inside the head, and the stepped surface of the first flower-shaped plate abuts against the end face of the cylindrical section, pressing the connection between the cylindrical section and the head tightly. At the same time, the inner tube is coaxially fitted outside the central tube. Then, under the combined action of the projectile welding fixture and the two centers, spot welding is performed at the joint between the head and the cylindrical section, spot welding is performed at the joint between the head and the mounting sleeve, and the projectile welding fixture is used to calibrate the circle to ensure the coaxiality of component one and component two. After the circle calibration is completed, the two spot welds are fully welded, and the welding slag is removed after the welding is completed. Finally, after the welding has cooled, the two tops and the projectile welding fixtures are removed. When removing the inner hole fixture, screws are screwed into the threaded hole. After the end of the screw abuts against the end face of the cylindrical section, the screws are screwed in. The screws push the cylindrical section away from the step surface, thus separating the cylindrical section from the flower-shaped disc and removing the inner hole fixture.

6. The method for forming a training bomb as described in claim 5, characterized in that, In step four, concrete is poured into the annular cavity formed by the cylindrical section and the central pipe. When the concrete reaches the end of the cylindrical section, the pouring fixture is installed on the cylindrical section. The axis of the injection fixture coincides with the axis of the projectile. The casting mold is coaxially sleeved on the outer circumferential surface of the cylindrical section. At this time, the end of the central tube extending out of the cylindrical section is coaxially located inside the casting mold, and the inner wall surface of the casting mold and the outer circumferential surface of the central tube form a casting cavity. Concrete is poured into the casting cavity through a hopper and then vibrated and compacted. After the concrete has initially solidified and formed a cone-shaped filling block, the pouring equipment is removed.

7. The method for forming a training bomb as described in claim 6, characterized in that, In step five, the conical segment is fastened onto the conical segment filler block and then proceeds to the conical segment welding process: the two centers are used again to hold the mounting sleeve and the inner hole of the central tube together, and the joint between one end of the conical segment and the cylindrical segment, and the other end of the conical segment and the central tube are welded together.

8. The method for forming a training bomb as described in claim 7, characterized in that, In step six, the axis of the component completed in the above steps is placed vertically by a hoisting tool, with the head of the projectile facing upward and the cone section facing downward. The tail fin welding fixture is placed below the cone section, with the axis of the tail fin welding fixture coinciding with the axis of the projectile. The welding base is placed on a liftable horizontal working platform. The tail fin is placed on the welding base, and the cylindrical bottom end of the tail fin is inserted into the mounting hole on the base plate. The tail fin blades abut against the outer circumferential surface of the limiting sleeve. At the same time, each blade is inserted into the notch groove provided on the inner wall of the two mounting holes. After the bottom end of the mandrel is coaxially installed in the positioning sleeve, the horizontal working platform is moved upward so that the top end of the mandrel is coaxially installed in the central tube, thereby making the axis of the mandrel coincide with the axis of the projectile; when the horizontal working platform moves upward until the top of the wing touches the outer circumference of the cone section, the horizontal working platform stops moving upward and the wing and the cone section are welded together.

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