CN114535385A - Punch forming equipment and process for thin-wall inner web rib plate - Google Patents

Abstract

The invention relates to a punch forming device and a punch forming process for a thin-wall inner web rib plate, wherein the device comprises a workbench, a die mounting table, a modular die, a main hydraulic cylinder and a main hydraulic cylinder mounting plate; the workbench is used for placing a workpiece; the die mounting table is arranged above the workbench and corresponds to the workpiece; the main hydraulic cylinder is arranged in the middle area of the top end of the mold mounting table, and the bottom of the main hydraulic cylinder is connected with the mold mounting table through a main hydraulic cylinder mounting plate; a plurality of modular mold mounting holes are arranged in a matrix form at the lower end surface of the mold mounting table; the modularized dies are respectively and longitudinally arranged in the modularized die mounting holes correspondingly. The process can realize gradient loading, gradually increase the reduction and realize the accurate control of different reductions. Compared with the prior art, the high-productivity and low-energy consumption structure provides a new idea for the forming technology of the structure, and is an advanced technology for manufacturing the thin-wall inner web rib plate with high performance, high efficiency and low cost.

Description

A kind of stamping forming equipment and process for thin-walled inner web rib

technical field

The invention relates to the technical field of aerospace advanced manufacturing and plastic processing, in particular to a stamping and forming equipment and a process for a thin-walled inner web rib.

Background technique

The rapid development of aerospace equipment requires the use of components with low weight and high load-carrying capacity. Thin-walled structures with internal abdominal ribs have the advantages of light weight, high stiffness, and strong bearing capacity, and are widely used in aerospace equipment. However, the complex geometry of the structure makes it difficult to manufacture. How to manufacture high-performance, high-efficiency, and low-cost thin-walled panels with internal ribs has become the forefront of aerospace equipment manufacturing technology.

The common applications of radial enveloping thin-walled structures are in the aerospace field, deep-sea fields, etc., such as rocket propellant storage tanks, which are aluminum alloy radially enveloping thin-walled structures. At present, the traditional manufacturing process of this structure is cutting, sheet metal And forging, the forming process involves subtractive manufacturing, with low production efficiency, high production costs, and low material utilization.

SUMMARY OF THE INVENTION

In order to overcome the problems of insufficient production efficiency, high production cost and low material utilization rate caused by traditional sheet metal, cutting and other manufacturing equipment processes for thin-walled inner webs, the present invention provides a punching method for thin-walled inner webs. The forming equipment and its process can not only realize the production of different forms of products, but also multiple displacement and load sensors can accurately control the stamping reduction amount, adjust the reduction load in real time, and at the same time, the built-in heating device of the indenter and the proposed step-by-step gradient pressure It ensures the mechanical properties of the product and provides a guarantee for the quality of the product.

The technical scheme adopted in the present invention is as follows:

The stamping and forming equipment for a thin-walled inner web rib proposed by the present invention includes a workbench, a die mounting platform, a modular die, a main hydraulic cylinder and a main hydraulic cylinder mounting plate; the workbench is used for placing workpieces; The mold mounting table is arranged on the top of the workbench and corresponds to the workpiece; the main hydraulic cylinder is arranged in the top middle area of the mold mounting table, and the bottom of the main hydraulic cylinder is connected with the mold mounting table through the main hydraulic cylinder mounting plate; the mold A plurality of modular mold mounting holes are arranged in a matrix on the lower end face of the mounting table; the modular molds are respectively arranged in the modular mold mounting holes correspondingly longitudinally.

Further, the modular mold includes a fine-tuning hydraulic cylinder and a mold indenter; the fine-tuning hydraulic cylinders are respectively disposed in the mounting holes of the modular mold; and the mold indenters are correspondingly disposed at the bottom ends of the fine-tuning hydraulic cylinders.

Further, the fine-tuning hydraulic cylinder is threadedly connected with the mounting hole of the modular mold.

Further, a displacement sensor and a pressure sensor are respectively installed on both sides of the top of the fine-tuning hydraulic cylinder.

Further, a heating device is provided inside the die pressing head.

A stamping forming process for a thin-walled inner web rib, comprising the following steps:

S1. Install the modular mold on the mold installation table, and install the workpiece on the worktable;

S2. Set the initial feed of the workpiece, set the reduction of the modular die to x1, and set the temperature of the die indenter;

S3. The main hydraulic cylinder controls the overall pressing of the mold mounting table. The first-level modular mold Mode I first contacts the workpiece, and the pressure sensor is fed back to the main control system to detect the contact between the modular mold and the workpiece. The main control system controls the mold indenter Heating to the set temperature, the whole mold mounting table is pressed down to the set reduction amount, and the modular mold is fine-tuned to precisely control the reduction amount;

S4. The displacement sensor is fed back to the main control system to detect that the pressing amount of the modular mold reaches the set value, the main hydraulic cylinder controls the mold mounting table to rise, and the work table controls the workpiece to advance a certain distance;

S5. Adjust the mold indenter of the second-stage modular mold Mode II to advance by x1 distance in advance by fine-tuning the hydraulic cylinder, and set the pressing amount of Mode II to x2;

S6. The main hydraulic cylinder controls the mold mounting table to descend, and Mode I and Mode II are in contact with the workpiece at the same time; the pressure sensor is fed back to the main control system to detect the contact between the modular mold and the workpiece, and the main control system controls the mold indenters of Mode I and Mode II to heat to the setting When the temperature is fixed, the overall mold installation table is pressed down to the set reduction amount, and the modular mold is pressed down and fine-tuned to precisely control the reduction amount;

S7. The displacement sensor is fed back to the main control system to detect that the pressing amount of the modular mold reaches the set value, the main hydraulic cylinder controls the mold mounting table to rise, and the work table controls the workpiece to advance a certain distance;

S8. Adjust the mold indenter of the third-stage modular mold Mode III by adjusting the hydraulic cylinder by fine-tuning the distance of x1+x2 in advance, and set the pressing amount of Mode III to x3;

S9. The main hydraulic cylinder controls the mold mounting table to descend, Mode I, Mode II and Mode III contact the workpiece at the same time; the pressure sensor is fed back to the main control system to detect the contact between the modular mold and the workpiece, and the main control system controls the mold pressure of Mode I, Mode II and Mode III. The head is heated to the set temperature, the overall mold mounting table is pressed down to the set reduction amount, and the modular mold is fine-tuned to precisely control the reduction amount;

S10, the displacement sensor is fed back to the main control system to detect that the pressing amount of the modular mold reaches the set value, the main hydraulic cylinder controls the mold mounting table to rise, and the work table controls the workpiece to advance a certain distance;

By analogy, a thin-walled inner web rib can be formed after n-stage stamping, and the height of the rib is equal to the sum of the reductions of the multi-stage pressing: h=x1+x2+x3+...+xn.

Compared with the prior art, the present invention has the following beneficial effects:

The invention can realize the continuous, efficient and stable production of the stamping and forming of the thin-walled inner web rib, and at the same time, adjusting the modular mold can flexibly realize the production of various forms and specifications of the thin-walled inner web rib. The sensor can precisely control the stamping reduction amount and adjust the reduction load in real time. At the same time, the built-in heating device of the indenter and the proposed step-by-step gradient reduction ensure the mechanical properties of the product and provide a guarantee for the quality of the product. Compared with the prior art, the high productivity and low energy consumption of the stamping and forming equipment and process of the thin-walled inner web rib of the present invention provide a new idea for the forming technology of the structure, which is a high-performance, high-efficiency solution. , Advanced technology for manufacturing thin-walled inner webs at low cost.

Description of drawings

1 is a schematic structural diagram of a stamping and forming equipment for a thin-walled inner web rib proposed by the present invention;

Fig. 2 is the structural representation of the mold mounting platform in Fig. 1;

Fig. 3 is the structural representation of the modular mold in Fig. 1;

FIG. 4 is a schematic view of the structure of the die indenter in FIG. 3 .

Wherein, the reference numerals: 1-workbench; 2-mould installation table; 21-modular mould installation hole; 22-oil passage through hole; 3-modular mould; 31-fine adjustment hydraulic cylinder; 32-mould indenter; 4-Main hydraulic cylinder; 5-Main hydraulic cylinder mounting plate; 6-Workpiece.

Detailed ways

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", "front" The orientation or positional relationship indicated by ", "rear", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not mean that the device or element must have a specific orientation, a specific orientation, and a specific orientation. Orientation construction and manipulation.

Referring to Figures 1 to 4, the specific structure of an embodiment of a stamping and forming equipment for a thin-walled inner web rib proposed by the present invention is given. The equipment includes a worktable 1, a mold mounting table 2, a modular mold 3, a main hydraulic cylinder 4 and a main hydraulic cylinder mounting plate 5; the worktable 1 is used to place the workpiece 6; the mold mounting table 2 is set on the working table The top of the table 1 corresponds to the position of the workpiece 6; the main hydraulic cylinder 4 is arranged in the top middle area of the mold mounting table 2, and the bottom of the main hydraulic cylinder 4 is fixedly connected with the mold mounting table 2 through the main hydraulic cylinder mounting plate 5; The lower end surface of the mold mounting table 2 is arranged in a matrix with a number of modular mold mounting holes 21. In this embodiment, the lower end surface of the mold mounting table 2 is arranged in a matrix with fifteen modular mold mounting holes 21. Arranged in three rows and five columns, each row of modular molds 3 is one level; the modular molds 3 are respectively disposed in the modular mold mounting holes 21 correspondingly longitudinally.

The modular mold 3 includes a fine-tuning hydraulic cylinder 31 and a mold indenter 32; the fine-tuning hydraulic cylinders 31 are respectively threaded in the modular mold mounting holes 21, and the modular mold mounting holes 21 are respectively provided with fine-tuning. The oil passage through hole 22 of the hydraulic cylinder 31; the die press head 32 is correspondingly arranged at the bottom end of the fine-tuning hydraulic cylinder 31; wherein, displacement sensors and pressure sensors are respectively installed on both sides of the top of the fine-tuning hydraulic cylinder 31; A heating device is provided inside the die pressing head 32 .

When working, the main hydraulic cylinder 4 controls the overall depression of the mold mounting table 2, and each modular mold 3 works according to the set temperature, displacement and depression load.

A stamping forming process for a thin-walled inner web rib, comprising the following steps:

S1. Install the modular mold on the mold mounting table 2, and install the workpiece 6 on the work table 1;

S2, set the initial feed amount of the workpiece 6, set the reduction amount of the first-level modular mold Mode I to x1, and set the temperature of the mold indenter 32 of this level;

S3. The main hydraulic cylinder 4 is used to control the overall depression of the mold mounting table 2. The first-level modular mold Mode I first contacts the workpiece 6, and the pressure sensor is fed back to the main control system to detect the contact between the modular mold 3 and the workpiece 6. The main control The system controls the mold indenter 32 to be heated to the set temperature, the integral mold mounting table 2 is pressed down to the set reduction amount, and the modular mold 3 is pressed and fine-tuned to precisely control the reduction amount;

S4, the displacement sensor is fed back to the main control system to detect that the pressing amount of the modular mold reaches the set value, the main hydraulic cylinder 4 controls the mold mounting table 2 to rise, and the work table 1 controls the workpiece 6 to advance a certain distance;

S5. Adjust the mold pressing head 32 of the second-stage modular mold Mode II by adjusting the fine-tuning hydraulic cylinder 31 in advance by a distance of x1, and set the pressing amount of Mode II to x2;

S6. The main hydraulic cylinder 4 controls the mold mounting table 2 to descend, and Mode I and Mode II are in contact with the workpiece 6 at the same time; the pressure sensor is fed back to the main control system to detect the contact between the modular mold 3 and the workpiece 6, and the main control system controls the molds of Mode I and Mode II. The indenter 32 is heated to the set temperature, the overall mold mounting table 2 is pressed down to the set reduction amount, and the modular molds 3 at all levels are pressed and fine-tuned to precisely control the reduction amount;

S7, the displacement sensor is fed back to the main control system to detect that the pressing amount of the modular mold 3 reaches the set value, the main hydraulic cylinder 4 controls the mold mounting table 2 to rise, and the work table 1 controls the workpiece 6 to advance a certain distance;

S8. Adjust the mold indenter 32 of the third-stage modular mold Mode III by adjusting the fine-tuning hydraulic cylinder 31 in advance by a distance of x1+x2, and set the depression amount of Mode III to x3;

S9. The main hydraulic cylinder 4 controls the mold mounting table 2 to descend, Mode I, Mode II and Mode III are in contact with the workpiece 6 at the same time; the pressure sensor is fed back to the main control system to detect the contact between the modular mold 3 and the workpiece 6, and the main control system controls Mode I, Mode II The mold indenter 32 of Mode III is heated to the set temperature, the overall mold mounting table 2 is pressed down to the set reduction amount, and the modular molds 3 at all levels are pressed and fine-tuned to precisely control the reduction amount;

S10, the displacement sensor is fed back to the main control system to detect that the pressing amount of the modular mold reaches the set value, the main hydraulic cylinder 4 controls the mold mounting table 2 to rise, and the work table 1 controls the workpiece 6 to advance a certain distance;

By analogy, a thin-walled inner web rib can be formed after n-stage stamping, and the height of the rib is equal to the sum of the reductions of the multi-stage pressing: h=x1+x2+x3+...+xn; In this embodiment, n=5, so the remaining steps include:

Adjust the die pressing head 32 of the fourth-stage modular die Mode IV by adjusting the fine-tuning hydraulic cylinder 31 in advance by a distance of x1+x2+x3, and set the pressing amount of ModeⅢ to x4;

The main hydraulic cylinder 4 controls the mold mounting table 2 to descend, Mode I, Mode II, Mode III and Mode IV are in contact with the workpiece 6 at the same time; the pressure sensor is fed back to the main control system to detect the contact between the modular mold 3 and the workpiece 6, and the main control system controls Mode I, Mode II , The mold indenters 32 of Mode III and Mode IV are heated to the set temperature, the overall mold mounting table 2 is pressed down to the set reduction amount, and the modular molds 3 at all levels are pressed and fine-tuned to precisely control the reduction amount;

The displacement sensor is fed back to the main control system to detect that the pressing amount of the modular mold reaches the set value, the main hydraulic cylinder 4 controls the mold mounting table 2 to rise, and the work table 1 controls the workpiece 6 to advance a certain distance;

Adjust the mold pressing head 32 of the fifth-stage modular mold Mode V by fine-tuning the hydraulic cylinder 31 to advance down the distance x1+x2+x3+x4 in advance, and set the pressing amount of Mode III to x5;

The main hydraulic cylinder 4 controls the mold mounting table 2 to descend, Mode I, Mode II, Mode III, Mode IV and Mode V are in contact with the workpiece 6 at the same time; the pressure sensor is fed back to the main control system to detect the contact between the modular mold 3 and the workpiece 6, and the main control system controls Mode I , Mode II, Mode III, Mode IV and Mode V die indenters 32 are heated to the set temperature, the overall mold mounting table 2 is pressed down to the set reduction amount, and the modular molds 3 at all levels are fine-tuned to precisely control the reduction amount;

The displacement sensor is fed back to the main control system to detect that the pressing amount of the modular mold reaches the set value, the main hydraulic cylinder 4 controls the mold mounting table 2 to rise, and the work table 1 controls the workpiece 6 to advance a certain distance.

After 5-stage stamping, a thin-walled inner web rib can be formed, and the height of the rib is equal to the sum of the reductions of the multi-stage pressing, that is, h=x1+x2+x3+x4+x5.

The present invention can replace traditional subtractive manufacturing methods such as cutting, sheet metal and forging, and gradient stamping can avoid plastic accumulation and residual stress to a great extent, and can avoid processing defects such as microcracks caused by the other processing methods mentioned above.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. On the premise of not departing from the design spirit of the present invention, those of ordinary skill in the art can Such deformations and improvements shall fall within the protection scope determined by the claims of the present invention.

Claims (6)

1. The utility model provides a stamping forming of belly floor is equipped in thin wall which characterized in that: the equipment comprises a workbench, a mold mounting table, a modular mold, a main hydraulic cylinder and a main hydraulic cylinder mounting plate; the workbench is used for placing a workpiece; the die mounting table is arranged above the workbench and corresponds to the workpiece; the main hydraulic cylinder is arranged in the middle area of the top end of the mold mounting table, and the bottom of the main hydraulic cylinder is connected with the mold mounting table through a main hydraulic cylinder mounting plate; a plurality of modular mold mounting holes are arranged in a matrix form at the lower end surface of the mold mounting table; the modularized dies are respectively and longitudinally arranged in the modularized die mounting holes correspondingly.

2. The equipment for punch forming of the thin-walled inner rib plate as claimed in claim 1, wherein: the modular die comprises a fine adjustment hydraulic cylinder and a die pressure head; the fine adjustment hydraulic cylinders are respectively and correspondingly arranged in the modular die mounting holes; and the die pressure heads are respectively and correspondingly arranged at the bottom ends of the fine adjustment hydraulic cylinders.

3. The apparatus for punch forming a thin-walled inner web floor as claimed in claim 2, wherein: and the fine adjustment hydraulic cylinder is in threaded connection with the modular die mounting hole.

4. The equipment for punch forming of the thin-walled inner rib plate as claimed in claim 2, wherein: and displacement sensors and pressure sensors are respectively installed on two sides of the top end of the fine adjustment hydraulic cylinder.

5. The equipment for punch forming of the thin-walled inner rib plate as claimed in claim 4, wherein: and a heating device is arranged inside the die pressure head.

6. A process for the stamping forming of thin-walled internal rib panels for use in the apparatus of claim 4, said process comprising the steps of:

s1, mounting the modular die on a die mounting table, and mounting a workpiece on a workbench;

s2, setting the initial feeding amount of the workpiece, setting the reduction amount of the modular die to be x1, and setting the temperature of the die pressure head;

s3, the mold mounting table is controlled to be integrally pressed down through a main hydraulic cylinder, the first-stage modular mold Mode I is firstly contacted with a workpiece, a pressure sensor feeds back to a master control system to detect the contact of the modular mold and the workpiece, the master control system controls the heating of a mold pressure head to a set temperature, the integral mold mounting table is pressed down to a set pressing amount, and the modular mold is pressed down to be finely adjusted to accurately control the pressing amount;

s4, feeding back the displacement sensor to a main control system to detect that the pressing amount of the modular mold reaches a set value, controlling the mold mounting table to ascend by a main hydraulic cylinder, and controlling the workpiece to feed forward for a certain distance by a workbench;

s5, adjusting the die pressure head of the second-stage modular die Mode II to extend downwards for a distance of x1 in advance through a fine adjustment hydraulic cylinder, and setting the pressing amount of Mode II as x 2;

s6, the main hydraulic cylinder control mold mounting table descends, and the Mode I and the Mode II are simultaneously contacted with the workpiece; the pressure sensor feeds back to the master control system to detect the contact between the modular die and the workpiece, the master control system controls die pressure heads of the Mode I and the Mode II to be heated to a set temperature, the integral die mounting table is pressed down to a set pressing amount, and the modular die is pressed down to be finely adjusted to accurately control the pressing amount;

s7, feeding back the displacement sensor to a main control system to detect that the pressing amount of the modular mold reaches a set value, controlling the mold mounting table to ascend by a main hydraulic cylinder, and controlling the workpiece to feed forward for a certain distance by a workbench;

s8, adjusting the die pressure head of the third-stage modular die Mode III to extend downwards for a distance of x1+ x2 in advance through a fine adjustment hydraulic cylinder, and setting the reduction of Mode III to be x 3;

s9, the main hydraulic cylinder control mold mounting table descends, and the Mode I, the Mode II and the Mode III simultaneously contact with the workpiece; the pressure sensor feeds back to the master control system to detect the contact between the modular die and the workpiece, the master control system controls die press heads of the Mode I, the Mode II and the Mode III to be heated to a set temperature, the whole die mounting table is pressed down to a set pressing amount, and the modular die is pressed down for fine adjustment to accurately control the pressing amount;

s10, feeding back the displacement sensor to a main control system to detect that the pressing amount of the modular mold reaches a set value, controlling the mold mounting table to ascend by a main hydraulic cylinder, and controlling the workpiece to feed forward for a certain distance by a workbench;

by analogy, a thin-wall inner web rib plate can be formed after n sections of punching, and the height of a rib plate is equal to the sum of the pressing amounts of the multiple sections of pressing: h ═ x1+ x2+ x3+. + xn.

Images