CN115958143A - Forming process and device for rolling blind hole of missile warhead shell through cross wedge rolling - Google Patents
Forming process and device for rolling blind hole of missile warhead shell through cross wedge rolling Download PDFInfo
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- CN115958143A CN115958143A CN202211697040.7A CN202211697040A CN115958143A CN 115958143 A CN115958143 A CN 115958143A CN 202211697040 A CN202211697040 A CN 202211697040A CN 115958143 A CN115958143 A CN 115958143A
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Abstract
The invention relates to the technical field of metal plastic forming process and equipment, and provides a forming process and a device for rolling a missile warhead shell wedge cross rolling blind hole, wherein the device comprises two core rods, two plate type wedge cross rolling dies and a die driving unit; two dies with opposite constant-speed linear motion are arranged in the radial direction of the bar stock, and two mandrels with follow-up rotary motion are arranged on two axial sides of the bar stock. The process comprises the following steps: blanking, designing a core rod and a roller, heating the solid round bar to a set deformation temperature, and rolling the solid round bar into two missile warhead shells by the device. The invention realizes severe plastic deformation with the total area shrinkage rate over 75 percent through secondary wedging, performs the optical axis of the blind hole firstly, then forms the target part, and realizes the cross wedge rolling high-performance high-efficiency rolling of the large area shrinkage rate band cut-off of the warhead shell of the munition missile for the first time. The rolled piece has no welding seam, less rolling temperature drop and good material uniformity, and the microstructure and the mechanical property of the shell of the warhead of the missile are obviously improved.
Description
Technical Field
The invention relates to the technical field of metal plastic forming process and equipment, in particular to a forming process and device for rolling a missile warhead shell wedge cross rolling blind hole.
Background
In the face of the current complex international situation, the bullet-guiding shell is an important component of national defense, military industry and aerospace aviation products, is an irreplaceable key basic part in the national military field, and the national wealthy and civilian strength must depend on the high performance and reliability of military industry products, so that the requirements on the design and manufacture of the bullet-guiding shell are higher and higher. The ground-drilling missile is a missile which carries a penetration warhead and is used for attacking targets such as airport runways, ground reinforcing targets, underground facilities and the like. The ground-boring bullet is composed of carrier and penetration warhead, and its main damage principle is that it adopts time-delay fuse to make the carried penetration warhead not explode immediately at the moment of contacting with target, but delay explosion time, and after the penetration warhead is drilled into the target, it can explode again to increase explosion power and damage effect.
With the continuous improvement of the speed of the tail section of the missile, higher requirements are also put forward on the shell of the warhead part, and higher strength, higher wear resistance and better shock resistance are required. The traditional warhead shell adopts a forging and welding manufacturing method, so that a complex structure cannot be manufactured, the problems of uneven materials, stress concentration and the like easily occur in a welding area, and the further improvement of the performance of the traditional warhead shell is limited.
Compared with the traditional revolving body production by forging process, extrusion process and machining process, the cross wedge rolling process with the core rod has the advantages of high production efficiency and material utilization rate, stable product forming quality, good structure performance and the like, controls the performance of a rolled piece by internal and external cooperative rolling, has attracted wide attention in the field of light weight in recent years, and is industrially applied to a plurality of fields of weapons, aerospace, ships, chemical industry, light industry, civilian use and the like.
Taking the production of the bullet-guiding shell as an example, the cross wedge rolling process based on the mandrel control mainly has the following advantages: firstly, the core rod is adopted for internal and external cooperative rolling, and the plastic strain is increased by adopting large-section shrinkage rate rolling, so that the material performance of the wall of the hollow tube is obviously improved; secondly, on the basis of the process that the cross wedge rolling speed is high, if 2 products are rolled at one time by adopting symmetrical rolling, the manufacturing efficiency can reach 20 products per minute, and the temperature drop is not obvious due to high-speed forming, so that the stability of the material performance can be ensured; and thirdly, compared with plate forming processes such as spinning and the like, a thick-wall shell can be formed by adopting a cross wedge rolling process, so that the degree of freedom of missile designers is increased. However, the existing cross wedge rolling process can only form solid shaft parts or through hole shaft parts, and can not form blind hole parts, and for disc-shaped parts with blind holes, such as missile shells, technical implementation schemes are not available at present.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
In view of the above and/or existing problems, the invention provides a forming process and device for rolling a blind hole of a missile warhead shell by cross wedge rolling, which upgrade and develop the existing cross wedge rolling technology, accurately control the concave center defect of the cross wedge rolling by two core rods, realize rolling with large section shrinkage and improve material performance by secondary wedging, and obtain two missile warhead shells by one-step rolling in a symmetrical rolling mode, thereby forming the missile warhead shell by a high-performance precise cross wedge rolling blind hole.
The invention adopts the following technical scheme:
on one hand, the invention provides a forming process for rolling blind holes of a missile warhead shell by cross wedge rolling, which comprises the following steps:
s1, according to the volume conservation principle, the blanking size of a solid round bar is obtained by calculating the volume of a shell of a missile warhead;
s2, designing two plate type cross wedge rolling dies according to the size of the outer surface of the shell of the warhead of the missile, and designing the external dimensions of two core rods according to the geometric dimension of an inner hole of the shell of the warhead of the missile; the missile warhead shell comprises a hollow cylinder and a conical blind hole end face;
s3, heating the solid round bar stock to a set deformation temperature;
s4, placing the solid round bar between two dies, and placing the two core rods at two ends of the solid round bar respectively and contacting with two end surfaces of the solid round bar respectively; the axis of the core rod is superposed with the axis of the solid round bar;
s5, rolling: the two plate type cross wedge rolling dies move linearly in opposite directions at a constant speed, the two core rods axially keep still and move circumferentially in a follow-up rotating manner, and the solid round bar materials are symmetrically rolled and formed under the combined action of the plate type cross wedge rolling dies and the core rods and are cut to obtain two missile warhead shells.
In step S2, the two plate-type cross wedge rolling dies are rectangular thick plates with the same geometric dimension, and the raised wedges of the two plate-type cross wedge rolling dies are symmetrically arranged by taking a solid round bar as a symmetry axis;
the plate type cross wedge rolling die is of a secondary wedging structure and sequentially comprises a feeding section, a first wedging section, a widening section, a second wedging section and a finishing section;
the feeding section is used for limiting the solid round bar rolled piece heated to the deformation temperature to a cross wedge rolling processing position;
the first wedging section is used for radially compressing the metal in a deformation area of a rolled piece so as to bite the plate type cross wedge rolling die into the rolled piece;
the spreading section is used for axially spreading the metal in the deformation area of the rolled piece and preforming the rolled piece into a blind hole optical axis;
the second wedging section enables metal in a deformation area of a rolled piece to be radially compressed, the plate type cross wedge rolling die is bitten into an optical axis of the blind hole, and the shape of the outer surface of a shell of the missile warhead is formed;
the finishing section is used for accurately forming the geometric dimension of the rolled piece and cutting off metal at the axial center of the rolled piece to form two missile warhead shells.
In any of the above possible implementation manners, there is further provided an implementation manner, in step S1, a mathematical relationship between the length L0 of the solid round bar and the thickness L1 of the blind hole of the shell of the warhead of the missile is L0=2 × L1, and a mathematical relationship between the diameter D0 of the solid round bar and the total volume V of the shell of the warhead of the missile is as follows:
in step S5, the solid round bar is preformed into a blind hole optical axis through the feeding section, the first wedging section and the widening section, and finally formed into two missile warhead shells through the second wedging section and the finishing section.
In step S2, the two mandrels are circular rod mandrels with the same geometric dimensions and the same circular arc end surfaces and the same diameter, the length of the mandrel is greater than the depth of the blind hole of the shell of the warhead of the missile, and the shape of the mandrel is consistent with the shape of the blind hole of the shell of the warhead of the missile; the two core rods are symmetrically arranged on two axial sides of the solid round bar.
In any of the above possible implementation manners, there is further provided an implementation manner, and in step S3, the deformation temperature is 600 ℃ to 1300 ℃.
On the other hand, the invention also provides a forming device for rolling the blind hole of the missile warhead shell through cross wedge rolling, which comprises two plate-type cross wedge rolling dies, two core rods and a die driving unit;
the two plate type cross wedge rolling dies have opposite constant-speed linear motion, are respectively arranged on two radial sides of the solid round bar, and are used for rolling a solid round bar rolled piece in the rolling process to form the external dimension of the shell of the warhead of the missile, and cutting the shell to obtain the two shells of the warhead of the missile; the missile warhead shell comprises a hollow cylinder and a conical blind hole end face;
the two core rods are axially kept still, have follow-up rotary motion in the circumferential direction, are respectively arranged on two axial sides of the solid round bar and are used for controlling the concave center defect and forming the geometric dimension of the inner hole of the shell of the warhead of the missile in the rolling process;
and the die driving unit is used for controlling the constant-speed opposite linear motion of the two cross wedge rolling dies.
Any one of the above possible implementation manners further provides an implementation manner that both the plate type cross wedge rolling dies are horizontally arranged.
In any of the above possible implementation manners, there is further provided an implementation manner that the two plate type cross wedge rolling dies have the same shape, and the two core rods have the same shape.
Any one of the above possible implementation manners further provides an implementation manner, and the solid round bar material is made of steel, aluminum alloy, titanium alloy or magnesium alloy.
The beneficial effects of the invention are as follows:
1. the blind hole shell is formed by controlling the concave center through the double core rods, rapid and continuous local forming is realized, and the blind hole shell has the advantages of no welding seam of a rolled piece, less temperature drop of variable rolling, good material uniformity and the like.
2. The rolling with large reduction of area is realized through secondary wedging, the total reduction of area exceeds 75%, the large plasticity induces the grain structure to be obviously refined, and the microstructure and the mechanical property of the shell of the warhead of the missile are obviously improved. The experiment shows that: compared with the traditional process, the process of the invention can reduce the average grain size of the parts by more than 50%; the fatigue strength is improved by more than 20 percent, and the compressive strength is improved by more than 20 percent; and the inner wall has no fold wrinkle defect.
3. The optical axis of the blind hole is preformed firstly, and then the secondary wedging section is wedged and widened simultaneously, so that the widening section is not needed by the outer step, and the rolling forming of the narrow step is realized.
4. The plate type cross wedge rolling structure is adopted, the abrasion of a guide plate does not need to be considered, the symmetrical cross wedge rolling forming with cutting is realized, and two missile warhead shells are formed at one time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic structural diagram of a shell of a warhead of a missile in an embodiment.
FIG. 2 is a schematic structural diagram of the whole forming device for cross wedge blind hole rolling of the missile warhead shell according to the embodiment.
FIG. 3 is a schematic diagram of the rolling process of the shell of the warhead of the missile in the embodiment.
FIG. 4 is a schematic diagram showing the deformation process of the shell of the warhead of the missile in the embodiment.
Fig. 5 is a schematic structural view of two plate type cross wedge rolling dies in the embodiment.
Fig. 6 is a schematic diagram showing the structure and dimensions of two mandrels in the example.
FIG. 7 is a schematic diagram showing the comparison between the inner wall structure (defect) of the conventional cross wedge rolling hollow shaft and the inner wall structure of the shell of the warhead of the missile prepared by the embodiment of the invention.
FIG. 8 is a schematic view showing the process of refining the grain size of the shell of the warhead of a missile according to an embodiment of the invention.
In the figure: 1. a first cross wedge rolling die; 2. a second cross wedge rolling die; 3. a first core rod; 4. a second core rod; 5. rolling pieces; 5a, solid round bar stock; 5b, blind hole optical axis; 5c, missile warhead shell; X-X is the axis of the rolled piece and the axis of the core rod; v1 is the linear motion of the first cross wedge rolling die; v2 is the linear motion of the second cross wedge rolling die; i is a material feeding section of a cross wedge rolling die; II is a first wedging section of the cross wedge rolling die; III is a spreading section of a cross wedge rolling die; IV, wedging the second time section of the cross wedge rolling die; v is a cross wedge rolling die finishing section; l0 is the length of the solid round bar; d0 is the diameter of the solid round bar; l1 is the depth of the blind hole of the shell of the warhead of the missile.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
As shown in fig. 1 to fig. 3, a forming process for rolling a blind cross wedge rolling hole of a shell of a warhead of a missile in an embodiment of the invention comprises the following steps:
s1, according to the volume conservation principle, the blanking size of a solid round bar is obtained by calculating the volume of a shell of a warhead of a missile;
s2, designing two plate type cross wedge rolling dies according to the outer surface size of the shell of the warhead of the missile, and designing the external dimensions of two core rods according to the geometric dimension of an inner hole of the shell of the warhead of the missile; the missile warhead shell comprises a hollow cylinder and a conical blind hole end face;
s3, heating the solid round bar stock to a set deformation temperature;
s4, placing the solid round bar between two dies, and respectively placing the two core rods at two ends of the solid round bar and respectively contacting with two end surfaces; the axis of the core rod is superposed with the axis of the solid round bar;
s5, rolling: the two plate type cross wedge rolling dies move linearly in opposite directions at a constant speed, the two core rods axially keep still and move circumferentially in a follow-up rotating manner, and the solid round bar materials are symmetrically rolled and formed under the combined action of the plate type cross wedge rolling dies and the core rods and are cut to obtain two missile warhead shells.
As shown in FIG. 1, the missile warhead casing 5c is a tapered blind shaft with an inner bore, and the geometric characteristics of the shaft include a hollow cylinder and a tapered blind end face.
As shown in fig. 2 and 3, two plate-type cross wedge rolling dies (a first cross wedge rolling die 1 and a second cross wedge rolling die 2) are correspondingly installed on two radial sides of a rolled piece 5, are both in contact with the radial outer surface of the rolled piece 5, and perform opposite constant-speed linear motions V1 and V2 with the axis X-X of the rolled piece as the center, so as to shape the outer surface shape of the missile warhead shell 5c.
As shown in fig. 2 and 3, two core rods (a first core rod 3 and a second core rod 4) are arranged on two axial sides of a rolled piece 5 and can perform follow-up rotation movement around the axis X-X of the rolled piece, and the first core rod 3 and the second core rod 4 are in contact with the axial end face of the rolled piece 5 and are used for controlling metal flow at the concave center defect of the rolled piece 5 so as to form the blind hole shape of the missile warhead shell 5c.
In one embodiment, as shown in fig. 1-3, a solid round bar 5a is placed in a space formed by a first cross wedge rolling die 1, a second cross wedge rolling die 2, a first mandrel 3 and a second mandrel 4 by using the cross wedge rolling process, the first cross wedge rolling die and the second cross wedge rolling die are driven by a linear motion V1 and a linear motion V2 together to roll symmetrically under the action of friction force, the solid round bar 5a is preformed into a blind hole optical axis 5b, and finally formed into two missile warhead shells 5c.
The mathematical relationship between the length L0 of the solid round bar and the thickness L1 of the blind hole of the shell of the missile warhead is L0= 2X L1, and the mathematical relationship between the diameter D0 of the solid round bar and the total volume V of the shell of the missile warhead is as follows:
the size design principle of the solid round bar 5a is as follows: the length L0 of the solid round bar stock is calculated first, and then the diameter D0 of the solid round bar stock is calculated.
As shown in fig. 5, the two plate type cross wedge rolling dies 1 and 2 are rectangular thick plates with the same geometric dimension, and the raised wedges C of the two plate type cross wedge rolling dies 1 and 2 are symmetrically arranged by taking a solid round bar 5a as a symmetry axis;
the plate type cross wedge rolling die is of a secondary wedging structure and sequentially comprises a feeding section I, a first wedging section II, a widening section III, a second wedging section IV and a finishing section V;
the feeding section I is used for limiting a solid round bar rolled piece 5 heated to a deformation temperature to a cross wedge rolling processing position;
the first wedging section II is used for radially compressing metal in a deformation area of a rolled piece so as to bite the plate type cross wedge rolling dies 1 and 2 into the rolled piece;
the spreading section III is used for axially spreading the metal in the deformation area of the rolled piece, and pre-forming the rolled piece 5 into a blind hole optical axis 5b;
the second wedging section IV enables metal in a deformation area of a rolled piece to be radially compressed, the plate type cross wedge rolling dies 1 and 2 are bitten into a blind hole optical axis 5b, and the shape of the outer surface of a missile warhead shell 5c is formed;
and the finishing section V is used for accurately forming the geometric dimension of the rolled piece and cutting off the metal at the axial center of the rolled piece to form two missile warhead shells 5c.
In a specific embodiment, as shown in fig. 6, the first mandrel 3 and the second mandrel 4 are circular rod mandrels with circular arc end surfaces and equal diameters and the same geometric dimensions, the length of the mandrels is greater than the depth of blind holes of the shell 5c of the missile warhead, and the shapes of the mandrels 3 and 4 are consistent with the shape of the blind holes of the shell 5c of the missile warhead; the two core rods 3 and 4 are symmetrically arranged on two axial sides of the solid round bar 5a.
As shown in fig. 2, a forming device for rolling blind holes in a missile warhead shell by cross wedge rolling according to an embodiment of the present invention includes two plate-type cross wedge rolling dies (a first cross wedge rolling die 1 and a second cross wedge rolling die 2), two core rods (a first core rod 3 and a second core rod 4), and a die driving unit;
the two plate type cross wedge rolling dies 1 and 2 have opposite constant-speed linear motion, are respectively arranged at two radial sides of a solid round bar 5a, and are used for rolling a solid round bar rolled piece 5 to form the external dimension of a missile warhead shell 5c in the rolling process, and cutting to obtain two missile warhead shells 5c; the missile warhead shell 5c comprises a hollow cylinder and a conical blind hole end face;
the two core rods 3 and 4 are axially kept still, have follow-up rotary motion in the circumferential direction, are respectively arranged on two axial sides of a solid round bar 5a and are used for controlling the concave center defect and forming the geometric dimension of an inner hole of the shell 5c of the warhead of the missile in the rolling process;
and the die driving unit is used for controlling the constant-speed opposite linear motion of the two cross wedge rolling dies 1 and 2.
The two plate type cross wedge rolling dies 1 and 2 are both horizontally arranged.
The working principle of the invention is as follows:
as shown in fig. 1-7, the length L0 of a solid round bar is first determined according to the depth L1 of a blind hole of a shell of a missile warhead, the diameter D0 of the solid round bar is calculated according to the total volume V of the shell 5c of the missile warhead, symmetrical rolling cross wedge rolling dies 1 and 2 are designed according to the shape of the shell 5c of the missile warhead, and the size of a mandrel is designed according to the shape of the blind hole of the shell 5c of the missile warhead. The method comprises the steps of transferring a solid round bar 5a heated to a rolling temperature into a forming device composed of two cross wedge rolling dies 1 and 2 and two mandrels 3 and 4, wherein the two cross wedge rolling dies 1 and 2 perform opposite constant-speed linear motion V1 and V2, the two mandrels 3 and 4 are axially fixed and rotate along with the forming device, the geometric dimension of an end surface inner hole of a rolled piece 5 is accurately controlled by the two mandrels 3 and 4, the geometric dimension of the outer surface of the rolled piece 5 is accurately formed by the two cross wedge rolling dies 1 and 2, the rolled piece 5 is preformed into a blind hole optical axis 5b firstly, and then is wedged and rolled into two missile warhead shells 5c secondly.
The technical effects produced by the invention are as follows:
1. due to the adoption of plate type cross wedge rolling and mandrel coordinated rolling, the metal of the shell of the warhead of the missile undergoes severe plastic deformation, and the severe plastic deformation induces grain refinement, wherein the grain refinement of the process reaches over 50 percent, as shown in figure 8; compared with the traditional blind hole shaft formed by cutting, the mechanical property is obviously improved, the fatigue strength is improved by more than 20 percent, and the compressive strength is improved by more than 20 percent.
2. The surface of an inner hole of a traditional cross wedge rolling hollow shaft is easily wrinkled, and the use performance of a blind hole new energy axle part is influenced; the process of the present invention can significantly improve this. As shown in fig. 7, a in fig. 7 is the inner hole wall of the conventional cross wedge rolling hollow shaft, which has obvious wrinkle defects, and b in fig. 7 is the inner hole wall obtained by the process of the present invention, which has smooth and flat surface. The improvement in wrinkling also has a beneficial effect on the performance of the part.
3. The invention has no stub bar loss, and obviously improves the material utilization rate; compared with the traditional blind hole shaft turning and forming process, the material utilization rate reaches over 90 percent.
The invention controls the concave forming blind hole shell based on the double-core rod, realizes the severe plastic deformation rolling with the total reduction of area over 75 percent by adopting the secondary wedging, innovatively applies the cross wedge rolling process to the forming and manufacturing field of the military missile shell, and realizes the cross wedge rolling high-performance high-efficiency rolling with the large reduction of area cut of the military missile warhead shell for the first time. The rolled piece has no welding seam, less rolling temperature drop and good material uniformity, the microstructure and the mechanical property of the missile warhead shell are obviously improved, and the method is particularly suitable for high-performance rolling forming of the thick-wall missile warhead shell.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A forming process for rolling blind holes in a missile warhead shell by cross wedge rolling is characterized by comprising the following steps:
s1, according to the volume conservation principle, the blanking size of a solid round bar is obtained by calculating the volume of a shell of a warhead of a missile;
s2, designing two plate type cross wedge rolling dies according to the size of the outer surface of the shell of the warhead of the missile, and designing the external dimensions of two core rods according to the geometric dimension of an inner hole of the shell of the warhead of the missile; the missile warhead shell comprises a hollow cylinder and a conical blind hole end face;
s3, heating the solid round bar stock to a set deformation temperature;
s4, placing the solid round bar between two dies, and placing the two core rods at two ends of the solid round bar respectively and contacting with two end surfaces of the solid round bar respectively; the axis of the core rod is superposed with the axis of the solid round bar;
s5, rolling: the two plate type cross wedge rolling dies move linearly in opposite directions at a constant speed, the two core rods axially remain still, the two core rods circumferentially rotate in a follow-up manner, and the solid round bar materials are symmetrically rolled and formed under the combined action of the plate type cross wedge rolling dies and the core rods and are cut to obtain two missile warhead shells.
2. The missile warhead shell wedge cross-rolling blind hole rolling forming process as claimed in claim 1, wherein in step S2, the two plate type wedge cross-rolling dies are rectangular thick plates with the same geometric dimension, and the raised wedges of the two plate type wedge cross-rolling dies are symmetrically arranged by taking a solid round bar as a symmetry axis;
the plate type cross wedge rolling die is of a secondary wedging structure and sequentially comprises a feeding section, a first wedging section, a widening section, a second wedging section and a finishing section;
the feeding section is used for limiting the solid round bar rolled piece heated to the deformation temperature to a cross wedge rolling processing position;
the first wedging section is used for radially compressing the metal in a deformation area of a rolled piece so as to bite the plate type cross wedge rolling die into the rolled piece;
the spreading section is used for axially spreading the metal in the deformation area of the rolled piece and preforming the rolled piece into a blind hole optical axis;
the second wedging section enables metal in a deformation area of a rolled piece to be radially compressed, the plate type cross wedge rolling die is bitten into an optical axis of the blind hole, and the shape of the outer surface of a shell of the missile warhead is formed;
the finishing section is used for accurately forming the geometric dimension of the rolled piece and cutting off metal at the axial center of the rolled piece to form two missile warhead shells.
3. The forming process for rolling the blind cross wedge rolling hole in the shell of the warhead of the missile as claimed in claim 1, wherein in the step S1, the mathematical relationship between the length L0 of the solid round bar and the thickness L1 of the blind hole in the shell of the warhead of the missile is L0=2 x L1, and the mathematical relationship between the diameter D0 of the solid round bar and the total volume V of the shell of the warhead of the missile is as follows:
4. the missile warhead shell wedge cross-rolling blind hole rolling forming process as claimed in claim 2, wherein in step S5, the solid round bar is preformed into a blind hole optical axis through the feeding section, the first wedging section and the widening section, and finally formed into two missile warhead shells through the second wedging section and the finishing section.
5. The missile warhead shell wedge cross-rolling blind hole rolling forming process as claimed in claim 1, wherein in step S2, the two mandrels are circular arc end face equal diameter round bar mandrels with the same geometric dimension, the length of the mandrel is greater than the blind hole depth of the missile warhead shell, and the shape of the mandrel is consistent with the blind hole shape of the missile warhead shell; the two core rods are symmetrically arranged on two axial sides of the solid round bar.
6. The forming process of the cross-wedge rolling blind hole of the shell of the missile warhead as in claim 1, wherein in the step S3, the deformation temperature is 600 ℃ to 1300 ℃.
7. A forming device for rolling blind holes of missile warhead shells through cross wedge rolling is characterized by comprising two plate-type cross wedge rolling dies, two core rods and a die driving unit;
the two plate type cross wedge rolling dies have opposite and constant-speed linear motion, are respectively arranged on two radial sides of the solid round bar, and are used for rolling a solid round bar rolled piece in the rolling process to form the external dimension of the missile warhead shell and cutting the shell to obtain two missile warhead shells; the missile warhead shell comprises a hollow cylinder and a conical blind hole end face;
the two core rods are axially kept still, have follow-up rotary motion in the circumferential direction, are respectively arranged on two axial sides of the solid round bar and are used for controlling the concave center defect and forming the geometric dimension of the inner hole of the shell of the warhead of the missile in the rolling process;
and the die driving unit is used for controlling the constant-speed opposite linear motion of the two cross wedge rolling dies.
8. The missile warhead shell cross wedge blind hole roll forming device of claim 7, wherein the two plate cross wedge rolling dies are horizontally arranged.
9. The missile warhead shell cross wedge blind hole roll forming device of claim 7, wherein the two plate cross wedge rolling dies are the same in shape, and the two mandrels are the same in shape.
10. The missile warhead shell cross wedge blind hole roll forming device of claim 7, wherein the solid round bar is made of steel, aluminum alloy, titanium alloy or magnesium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211697040.7A CN115958143A (en) | 2022-12-28 | 2022-12-28 | Forming process and device for rolling blind hole of missile warhead shell through cross wedge rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211697040.7A CN115958143A (en) | 2022-12-28 | 2022-12-28 | Forming process and device for rolling blind hole of missile warhead shell through cross wedge rolling |
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| Publication Number | Publication Date |
|---|---|
| CN115958143A true CN115958143A (en) | 2023-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211697040.7A Pending CN115958143A (en) | 2022-12-28 | 2022-12-28 | Forming process and device for rolling blind hole of missile warhead shell through cross wedge rolling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115958143A (en) |
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2022
- 2022-12-28 CN CN202211697040.7A patent/CN115958143A/en active Pending
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