CN109382435B - A kind of internal spinning equipment - Google Patents

Abstract

The invention provides internal spinning equipment which comprises a spindle box, a die transmission cylinder, a spinning wheel mechanism, a traction mechanism, a material pressing ring and a numerical control machine tool body, wherein the spinning wheel mechanism comprises a spinning wheel head mechanism, a spinning wheel radial feeding structure, a spinning wheel arm, a spinning arm seat and an axial feeding structure. The invention can realize two axial movements on the same axis, provides movement space for the inner spinning and tension spinning composite process by adopting the traction mechanism, realizes that the inner spinning traction mechanism and the spinning wheel mechanism coaxially move independently from each other, and provides guarantee for realizing the composite spinning process.

Description

A kind of internal spinning equipment

technical field

The invention relates to an internal spinning device, which belongs to the technical field of internal spinning.

Background technique

External spinning is a traditional spinning process technology. The external spinning technology can produce cylindrical revolving parts with long length and external reinforcing ribs. and tapered parts. However, the length of the outer spinning die is required to be longer than the length of the product, which is difficult to manufacture, low in assembly and adjustment accuracy, and high in production cost. The most important thing is that the product with the inner circumferential reinforcing rib formed by the outer strong spinning process must be split. Molds must be disassembled and reassembled every time a product is produced. The production efficiency is extremely low, and it is not suitable for mass production. It has been unable to meet the requirements of low-cost, high-efficiency, high-precision, and high-quality defense industry products.

Internal spinning technology is a relatively new spinning technology. It can produce cylindrical revolving parts with inner circumferential reinforcing ribs. It has the characteristics of high product precision, high yield and high production efficiency. certain advanced. However, the mold length of the internal spinning technology is required to be longer than the length of the product, which is difficult to manufacture, low in assembly and adjustment accuracy, and high in production cost. The most important thing is that this process can only produce products with a length of less than 1m. If the product is too long, the workpiece will be damaged. If the contact area between the outer surface and the mold is too large, and the friction force is large, the workpiece will not be released from the mold, and it cannot be used in the production of large-diameter, high-precision long cylindrical parts required for the development of the defense industry.

The existing internal spinning equipment is shown in Figure 6, (wherein the spinning machine body 01, the core mold 02, the rotary wheel 03, the workpiece 04, the balance wheel mechanism 05, the screw 06, the pressing ring 07, the rotary wheel arm 08, As shown in the lateral carriage 09), a lateral L-shaped cantilevered single-wheel inner spinning mechanism is adopted, and the shaft and radial feed of the rotary wheel 03 are driven by the lateral carriage 09 to drive the L-shaped fixed on it. The rotary wheel arm 08 is driven by the motor to realize the overall axial and radial movement. The rotary wheel arm is too long, the rigidity of single wheel spinning is extremely low, and automatic centering spinning cannot be realized, and the spinning force is small, which cannot be difficult to form thick walls. The spinning processing of materials cannot meet the processing of high-precision products.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a high-efficiency, high-precision, low-cost internal spinning device that uses a short core mold to process long cylindrical products.

The technical solution of the present invention: an internal spinning equipment, including a spindle box, a mold transmission cylinder, a rotary wheel mechanism, a traction mechanism, a pressing ring and a CNC machine bed, and the rotary wheel mechanism includes a rotary wheel head mechanism, a rotary wheel diameter The feed structure, the rotary arm, the arm seat, the axial feed structure and the feed box, the traction mechanism includes the traction mechanism rotating body, the traction mechanism rotating body bearing, the traction mechanism seat, the traction mechanism axial feed structure, the mold The transmission cylinder is installed on the spindle of the CNC machine tool, the mold is installed at the front end of the inner cavity of the mold transmission cylinder, the rotating body of the traction mechanism is installed in the traction mechanism seat through the traction mechanism rotating body bearing, the traction mechanism seat is installed on the CNC machine tool bed, and the blank passes through the pressing material. The ring is installed on the rotating body of the traction mechanism. The traction mechanism seat realizes axial movement through the axial feed structure of the traction mechanism. The feed structure is installed in the inner cavity of the rotary wheel arm, the rotary wheel head mechanism is connected with the rotary wheel radial feed structure, and the rotary arm seat is installed on the CNC machine tool bed and is connected with the axial feed structure.

The wheel head mechanism is composed of a wheel head body, a wedge iron and three groups of wheel assemblies evenly distributed in the circumferential direction. The main body of the head is fixedly connected with the front end of the wheel arm. The wedge iron is a triangular wedge-shaped structure. In the middle, the supporting rolling body is pressed on the inclined surface of the wedge iron, and the rear end of the wedge iron is fixedly connected with the radial feed structure of the rotary wheel.

The section of the wedge iron is an equilateral triangle, and the three vertices are rounded.

In the wheel head mechanism, the adjacent connecting rods are connected by springs.

The axial feed structure includes an axial feed screw and an axial feed drive motor.

The axial feeding structure of the traction mechanism comprises an axial feeding screw of the traction mechanism and an axial feeding driving motor of the traction mechanism.

The rotary wheel radial feed structure comprises a rotary wheel radial feed screw and a rotary wheel radial feed drive motor.

The beneficial effects of the present invention compared with the prior art:

(1) The present invention can realize two kinds of axial movements on the same axis, provide movement space for the internal spinning and tension spinning composite process using the traction mechanism, and realize that the internal spinning traction mechanism and the rotary wheel mechanism are coaxial and The independent movement of each other provides a guarantee for the realization of the composite spinning process;

(2) The present invention adopts a 120° symmetrical three-rotor structure with a special structure. When the length of the arm reaches 2m and the strong spinning force reaches more than ten tons, the wheel head mechanism can automatically align and obtain a balanced force. Greatly improve the rigidity of spinning system;

(3) The overall design of the present invention adopts a clustered cantilever structure with a built-in radial drive system, which solves the problems of many functional parts of the rotary wheel mechanism and narrow working space;

(4) The present invention utilizes the cooperation of the wedge iron and the rotary wheel assembly to convert the precise numerical control of the shaft and radial motion into the radial motion of the rotary wheel head, and realizes the precise numerical control of the radial feed of the rotary wheel, thereby realizing the accurate numerical control of the rotary wheel. Accurate axis and radial motion transformation in a narrow space satisfies the precise control of the radial feed of the rotary wheel;

(5) The present invention adopts the wheel base as the overall axial movement carrier of the wheel head mechanism and the wheel arm, which can realize the digital and precise control of the axial feed movement, and realize the axial and radial feed functions of the wheel in the same mechanism. The integration of the above provides a guarantee for the realization of axial feed in the internal spinning process;

(6) The present invention realizes that long cylindrical parts with long dimensions can be formed by using a short annular core mold, greatly reduces the manufacturing difficulty and manufacturing cost of long cylindrical molds, and avoids the problems of low rigidity and low use precision of long molds , reduces the difficulty of mold assembly and adjustment, improves the use accuracy, and provides a guarantee for forming high-precision products.

Description of drawings

Fig. 1 is the schematic diagram of spinning equipment of the present invention;

Fig. 2 is the structure schematic diagram of the rotary wheel mechanism of the present invention;

FIG. 3 is a schematic diagram of the cooperation between the rotary wheel mechanism and the traction mechanism of the present invention;

Fig. 4 is the structure schematic diagram of the wheel head of the present invention;

5 is a schematic diagram of the cooperation of the wedge iron and the rotary wheel assembly of the present invention;

FIG. 6 is a schematic structural diagram of the existing internal spinning equipment.

Detailed ways

The present invention will be described in detail below with reference to specific examples and accompanying drawings.

As shown in Figure 1, the spinning equipment includes a spindle box 1, a mold transmission cylinder 2, a rotary wheel mechanism, a traction mechanism 9, a pressing ring 10 and a CNC machine bed 11. The mold transmission cylinder 2 is installed on the CNC machine tool spindle, and the mold 3 is installed at the front end of the inner cavity of the mold transmission cylinder 2, and the rotary wheel mechanism and the traction mechanism 9 are installed on the bed 11 of the CNC machine tool.

The traction mechanism 9, as shown in FIG. 3, includes a traction mechanism rotor 901, a traction mechanism rotor bearing 902, a traction mechanism seat 903, a traction mechanism axial feed screw 904, and a traction mechanism axial feed drive motor 905. The traction mechanism The rotating body 901 is installed in the pulling mechanism seat 903 through the pulling mechanism rotating body bearing 902, the pulling mechanism seat 903 is installed on the guide rail of the CNC machine bed 11, and the blank 5 is installed on the pulling mechanism rotating body 901 through the pressing ring 10. The mechanism seat 903 realizes the axial movement through the traction mechanism axial feed screw 904 and the traction mechanism axial feed drive motor 905 .

The rotary wheel mechanism is shown in Figures 2 and 3, including rotary wheel head mechanism 4, rotary wheel radial feed screw 12, rotary wheel radial feed drive motor 13, rotary wheel arm 6, rotary arm seat 7, axial The feed screw 14, the feed box 8 and the axial feed drive motor 15. The feed box 8 is fixed at the end of the CNC machine tool bed 11, and an axial feed drive motor 15 is installed inside the feed box 8, the center line of which is connected to the machine tool. The center line of the spindle coincides; the arm seat 7 is installed on the guide rail of the CNC machine tool bed 11, and its center line coincides with the center line of the machine tool spindle, and is connected with the feed box 8 through the axial feed screw 14, which can be driven by CNC programming. To the feed screw 14, the jib seat 7 is moved in an axial direction with precise control of speed and position; the jib arm 6 is fixed on the jib seat 7 by screws, and its center line coincides with the center line of the machine tool spindle, which is divided into two parts. Several sections are connected by bolts, the interior of which is hollow for placing the rotary wheel radial feed drive motor 13, which can be disassembled and maintained at the section; the rotary wheel radial feed drive motor 13 is fixed in the inner cavity of the rotary wheel arm 6 Close to one end of the rotary wheel head mechanism 4; one end of the rotary wheel radial feed screw 12 is fixedly connected with the rotary wheel head mechanism 4, and the other end is installed in the inner cavity of the rotary wheel arm 6 through the rotary wheel radial feed drive motor 13, which can be controlled by numerical control. The programming drives the rotary wheel radial feed screw 12 to move.

As shown in FIG. 4 , the wheel head mechanism 4 is composed of three groups of wheel assemblies that are evenly distributed in the circumferential direction, the wheel head body 406 and the wedge iron 401 . Rod 404 and connecting rod shaft 405, the main body 406 of the wheel head is fixedly connected with the wheel arm 6 through screws, the wheel 403 is connected to the main body 406 of the wheel head through the connecting rod 404 and the connecting rod shaft 405, and the adjacent connecting rod 404 is connected to the main body 406 of the wheel head. A spring is connected in between, and its function is to keep the rotary wheel compressing in a natural state; the rotary wheel radially feeds the screw 12 and one end of the wedge iron 401 is connected.

The connecting rod 404 is a three-link structure, which is used to connect the supporting rolling body 402 and the main body 406 of the wheel head, and transmit the axial motion of the wedge iron 401 to the wheel 403 .

As shown in FIG. 5 , the wedge iron 401 is a triangular wedge-shaped structure with an equilateral triangle in cross section, and the three vertices are rounded to effectively prevent the movement interference between the adjacent supporting rolling elements 402 . The wedge iron 401 is placed inside the main body 406 of the wheel head. , Between the three connecting rods, the radial feed screw 12 of the rotary wheel is connected with the servo motor placed inside the arm, and the servo motor drives the screw to rotate, thereby driving the wedge iron 10 to move axially; and the wedge iron 401 During the axial movement, the three inclined surfaces are in contact with the supporting rolling body 402 connected to the front end of the connecting rod 404 to realize the radial movement of the rotary wheel 403. The axial movement of the wedge iron 401 and the radial feed of the rotary wheel 403 can pass through Mathematical calculation, into a certain proportional relationship, and reflected in the numerical control program control, realizes the rotary wheel 403 radial feed can be numerical control program control.

The parts of the present invention that are not described in detail are well known to those skilled in the art.

Claims (7)

1. The utility model provides an interior spinning equipment, includes headstock (1), mould transmission cylinder (2), mandrel (3), revolves wheel mechanism, pressure material ring (10) and digit control machine tool lathe bed (11), and install on the digit control machine tool main shaft mould transmission cylinder (2), and install at mould transmission cylinder (2) inner chamber front end mandrel (3), its characterized in that: the drawing mechanism comprises a drawing mechanism rotating body (901), a drawing mechanism rotating body bearing (902), a drawing mechanism seat (903) and a drawing mechanism axial feeding structure, wherein the drawing mechanism rotating body (901) is installed in the drawing mechanism seat (903) through the drawing mechanism rotating body bearing (902), the drawing mechanism seat (903) is installed on a numerically-controlled machine tool body (11), a blank (5) is installed on the drawing mechanism rotating body (901) through a material pressing ring (10), and the drawing mechanism seat (903) is connected with the drawing mechanism axial feeding structure to realize axial movement;

the rotary wheel mechanism comprises a rotary wheel head mechanism (4), a rotary wheel radial feeding structure, a rotary wheel arm (6), a rotary arm seat (7) and an axial feeding structure, wherein the rotary wheel arm (6) is of a hollow structure, the rear end of the rotary wheel arm (6) is fixedly connected with the rotary arm seat (7), the front end of the rotary wheel arm is fixedly connected with the rotary wheel head mechanism (4), the rotary wheel radial feeding structure is installed in an inner cavity of the rotary wheel arm (6), the rotary wheel head mechanism (4) is connected with the rotary wheel radial feeding structure, and the rotary arm seat (7) is installed on a numerically-controlled machine tool body (11) and is connected with the axial feeding structure.

2. An internal flow forming apparatus according to claim 1, wherein: the spinning roller head mechanism (4) is composed of a spinning roller head main body (406), a wedge iron (401) and three groups of spinning roller assemblies which are uniformly distributed in the circumferential direction, each group of spinning roller assembly comprises a supporting rolling body (402), a spinning roller (403), a connecting rod (404) and a connecting rod shaft (405), the spinning roller head main body (406) is fixedly connected with the front end of a spinning roller arm (6), the wedge iron (401) is of a triangular wedge-shaped structure in cross section, one end of the connecting rod (404) is connected with the supporting rolling body (402), the other end of the connecting rod (404) is connected onto the spinning roller head main body (406) through the connecting rod shaft (405), the spinning roller (403) is installed in the middle of the connecting rod (404), the supporting rolling body (402) is pressed on an inclined plane of the wedge iron (401), and the rear end of the wedge iron.

3. An internal flow forming apparatus according to claim 2, wherein: the cross section of the wedge iron (401) is in a regular triangle shape, and three vertexes are rounded.

4. An internal flow forming apparatus according to claim 2, wherein: the adjacent connecting rods (404) in the rotary wheel head mechanism (4) are connected through springs.

5. An internal flow forming apparatus according to claim 1, wherein: the axial feeding structure comprises an axial feeding lead screw (14) and an axial feeding driving motor (15).

6. An internal flow forming apparatus according to claim 1, wherein: the traction mechanism axial feeding structure comprises a traction mechanism axial feeding lead screw (904) and a traction mechanism axial feeding driving motor (905).

7. An internal flow forming apparatus according to claim 2, wherein: the rotary wheel radial feeding structure comprises a rotary wheel radial feeding lead screw (12) and a rotary wheel radial feeding driving motor (13).

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