CN101412058B - Rotary extrusion forming method of non-circular cross-section parts and equipment thereof - Google Patents

Abstract

The invention provides a spin forming method for non-circular section parts and equipment thereof. The method comprises the following steps: after a workpiece is mounted, a main shaft starts to drive the workpiece to rotate, and a rotary wheel device transversely feeds; within one-circle rotation of the main shaft, the rotary wheel device quickly moves forward and backward for a plurality of times, a coordinate relationship is maintained between rotary angles of the main shaft; at the same time, a platform is longitudinally moved to drive the rotary wheel to feed longitudinally, so that the workpiece, after spin forming, is formed into non-circular section parts; the equipment consists of a machine tool and a control platform circuit which are connected with each other, the machine tool comprises a main spindle box, a machine tool body, a longitudinal motion platform, a tail-top device, a servo motor feeding device, a hydraulic station, a linear motor feeding device and a rotary wheel device, the main spindle box and the tail-top device are coaxially arranged on both ends of the machine tool body, the hydraulic station is connected with the tail-top device by an oil pipe, the servo motor feeding device is arranged on one part of the machine tool body, the longitudinal motion platform is arranged in the machine tool body, both ends of the longitudinal motion platform are provided with longitudinal straight line guide rails, and the linear motor feeding device driving the rotary wheel device is arranged on one side of the longitudinal motion platform.

Description

Spinning forming method and equipment for non-circular cross-section parts

technical field

The invention relates to the technical field of plastic processing, in particular to a spinning forming method and equipment for parts with non-circular cross-sections.

Background technique

The traditional spinning forming methods can be divided into two categories, namely ordinary spinning (spinning without constant thinning) and powerful spinning (spinning with thinning). During ordinary spinning or powerful spinning, the workpiece is clamped on the spindle of the machine tool, and rotates with the spindle of the machine tool, and the spinning wheel moves radially and axially along the axis of the workpiece, so that it can be processed into various shapes of axisymmetric Thin-walled hollow parts (uniaxial spinning parts).

In recent years, a new spinning forming method has emerged. During spinning, the workpiece is clamped on a worktable that can simultaneously or separately move longitudinally and laterally along the machine tool spindle and deflect in the horizontal plane. The rotary wheel revolves and rotates around the workpiece, and can simultaneously perform feed motion along the direction of the revolution radius, so as to process non-axisymmetric parts (multi-axis spinning parts) whose axes are parallel or inclined to each other.

However, in the above-mentioned spinning forming method, the feed motion of the rotary wheel device along the lateral direction of the machine tool is realized by ordinary stepping motors or servo motors and other rotating motors by driving the motion of the ball screw pair. The acceleration that can be generated is relatively small, so the feed motion of the rotary wheel along the radial direction of the workpiece is static, that is, the feed speed and the speed change are relatively slow, so each cross-section of the processed parts is circular of. For the forming of sheet metal parts with non-circular cross-sections, if the spinning forming process is used, the feed motion of the rotary wheel along the radial direction of the workpiece needs to form a large acceleration relative to the rotation speed of the workpiece itself, that is, as the machine tool spindle The rotation of the rotating wheel and the lateral feed movement of the rotary wheel along the machine tool can be quickly reversed. This requirement cannot be achieved at all with ordinary rotating motors. take shape. Such parts are generally processed by first processing the convex and concave dies with complex shapes, and then stamped, or by dividing the parts into several parts with simple shapes and forming them separately, and then welding them into one. This not only increases the process and prolongs the processing cycle, but also in the case of multiple varieties and small batches, the production cost will inevitably be too high. If the welding method is used, the mechanical properties of the material will also be reduced, which will affect the normal use of the parts.

Contents of the invention

The purpose of the present invention is to overcome the disadvantages of the prior art, and provide a method for spinning non-circular cross-section parts with fewer steps, shorter processing cycle and lower production cost.

Another object of the present invention is to provide a spinning forming equipment for non-circular cross-section parts used in the above method, which has a simple structure and high machining accuracy.

The present invention is realized through the following technical solutions: a spinning forming method for non-circular cross-section parts, comprising the following steps:

(1) Write a control program on the console according to the shape and size of the non-circular cross-section parts, and set the parameters such as the feed trajectory and feed speed of the rotary wheel;

(2) Install the workpiece, then start the servo motor feeding device, and adjust the longitudinal moving platform so that the rotary wheel reaches the designated position close to the workpiece;

(3) Start the spindle to rotate, and the spindle rotates to drive the workpiece to rotate;

(4) Simultaneously start the linear motor feed device to control the horizontal movement of the rotary wheel device and maintain the coordination relationship with the rotation angle of the main shaft. At the same time, the servo motor feed device controls the longitudinal movement platform to drive the rotary wheel device to move longitudinally. Longitudinal feeding and horizontal feeding are carried out at the same time, and the workpiece is spun to form the workpiece;

All the above steps are controlled and completed on the console.

Wherein, the feed track of the rotary wheel in step (1) includes the feed amount of the rotary wheel and the feeding times of the rotary wheel when the main shaft rotates one revolution.

The installation of the workpiece in the step (2) specifically includes: first clamping the workpiece on the shaft head of the main shaft, and then driving the tail jacking device by the hydraulic station to clamp it.

Step (3) and step (4) are carried out at the same time, and the coordination relationship between the rotation angle of the main shaft and the feed track of the rotary wheel is maintained.

The present invention is a kind of spinning forming equipment for non-circular cross-section parts used in the above method, which is composed of a machine tool connected with a console circuit; wherein, the machine tool includes a spindle box, a bed, a longitudinal moving platform, a tail top device, and a servo motor feed Device, hydraulic station, linear motor feed device and rotary wheel device; the headstock is placed at the left end of the bed, the tail jacking device is placed at the right end of the bed and coaxial with the headstock, the hydraulic station is connected to the tail jacking device through the oil pipe, and the servo The motor feeding device is placed at the right end of the bed, and the two ends of the longitudinal moving platform are equipped with longitudinal linear guide rails. The servo motor feeding device controls the longitudinal moving platform to move longitudinally along the longitudinal linear guide rails in the bed, and the linear motor feeding device is installed on the longitudinal moving platform. On one side, the rotary wheel device is placed on the side of the linear motor feed device facing the center of the bed.

The linear motor feeding device includes a stator, a mover and a motor linear guide rail. The mover is placed inside the stator and moves inside the stator through the motor linear guide rail. The mover drives the rotary wheel device to feed laterally through the motor linear guide rail.

The rotary wheel device is formed by fixing the rotary wheel on the rotary wheel mounting frame, and the rotary wheel mounting frame for installing the rotary wheel is fixed on the mover side of the linear motor feeding device.

In order to better realize the present invention and improve the forming ability of the rotary wheel device, an inclined-plane booster mechanism is added between the linear motor feeding device and the rotary wheel device, and the inclined-plane booster mechanism includes an oblique push block and a roller The rotary wheel device includes a rotary wheel seat, a horizontal linear guide rail, a rotary wheel mounting frame and a rotary wheel; one end of the inclined plane propulsion block is placed inside the stator of the linear motor feeding device to connect with the mover, and the other end is connected to the rotary wheel through the roller The rotating wheel seat of the device is connected, and a horizontal linear guide rail is arranged in the rotating wheel seat, and the rotating wheel mounting bracket for installing the rotating wheel is fixed on one side of the rotating wheel seat.

Since the movement direction of the rotary wheel device is the transverse direction of the machine tool (x direction), the movement direction of the inclined plane push block is set along the machine tool axis (z direction), and the inclined direction of the inclined plane of the inclined plane propulsion block is designed to be aligned with the machine tool axial direction. The smaller the included angle α, the roller keeps in contact with the slope of the slope pushing block. When the inclined plane propulsion block moves along the z direction with a small force, the wedge-shaped action of the inclined plane will generate a greater propulsion force on the movement of the rotary wheel device in the x direction. The smaller the angle α, the generated thrust will be The larger the , the greater the stroke required, so if the size of the machine tool allows and requires a larger lateral propulsion of the rotary wheel, the included angle α can be selected to be a smaller angle.

The spinning forming equipment for non-circular cross-section parts of the present invention has the following working principle: After adjusting the relative position of the workpiece and the rotary wheel, start the automatic control program to drive the main shaft to rotate, thereby driving the workpiece to rotate; the rotary wheel device rotates according to the set Feed trajectory, feed speed and the actual rotation angle of the machine tool spindle are used to perform the feed movement. The linear motor feed device drives the rotary wheel device to perform rapid forward and backward movements along the machine tool for many times within one rotation of the main shaft. At the same time, the servo motor feeding device controls the longitudinal moving platform to move along the longitudinal linear guide rail, thereby driving the rotary wheel device to perform longitudinal feeding movement; since the rotary wheel device moves longitudinally and horizontally at the same time, and realizes multiple rapid advances in the horizontal direction And back, so that the workpiece can be formed into non-circular cross-section parts after spinning.

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

1. The spinning forming method of non-circular cross-section parts has fewer procedures, simple processing process and short processing cycle, which can not only improve the production efficiency in mass production, but also reduce its cost when used in small batches of multiple varieties.

2. This spinning forming equipment for non-circular cross-section parts has simple structure, high processing precision, and its application is also very wide. It can be used to directly process non-circular cross-section uniaxial sheet metal parts or ordinary circular cross-section uniaxial sheet metal Parts can also be used for spin forming of circular cross-section multi-axis spinning parts or non-circular cross-section multi-axis parts.

Description of drawings

Fig. 1 is the relative relation schematic diagram of workpiece and rotary wheel among the present invention.

Fig. 2 is a structural top view of the spinning forming equipment for non-circular cross-section parts of the present invention.

Fig. 3 is a structural schematic diagram of the linear motor feeding device and the rotary wheel device installed on the longitudinal moving platform in Fig. 2 .

Fig. 4 is another structural top view of the spinning forming equipment for non-circular cross-section parts of the present invention.

Fig. 5 is a schematic structural view of the linear motor feeding device and the rotary wheel device in Fig. 4 with the addition of an inclined-plane booster mechanism.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1

A spinning forming method of a non-circular section part of the present invention comprises the following steps:

(1) As shown in Figure 1, according to the shape and size of the non-circular cross-section part O, set the feed trajectory of the rotary wheel on the console (including the feed amount, the number of feeds of the rotary wheel when the main shaft rotates one revolution, etc.) and Feed rate;

(2) To install the workpiece, that is, to clamp the workpiece on the shaft head of the main shaft first, and then drive the tail top device to clamp it by the hydraulic station, then start the servo motor feeding device, adjust the longitudinal moving platform so that the rotary wheel reaches the position close to the workpiece specified location;

(3) Start the spindle to rotate, and the spindle rotates to drive the workpiece to rotate;

(4) Simultaneously start the linear motor feed device to control the horizontal movement of the rotary wheel device and maintain the coordination relationship with the rotation angle of the main shaft. At the same time, the servo motor feed device controls the longitudinal movement platform to drive the rotary wheel device to move longitudinally. Longitudinal feeding and horizontal feeding are carried out at the same time, and the workpiece is spun to form the workpiece;

Each step in the above method is controlled and completed on the console.

A kind of spinning forming equipment of the non-circular section parts of the present invention is used for above method, and its structure is shown in Figure 2, is made up of machine tool and console 9 circuit connections; Wherein, machine tool comprises spindle box 1, bed 2, longitudinal Mobile platform 3, tail top device 4, servo motor feed device 6, hydraulic station 5, linear motor feed device 7 and rotary wheel device 8; spindle box 1 is placed at the left end of bed 2, and tail top device 4 is placed on the bed The right end of 2 is set coaxially with the headstock 1, the hydraulic station 5 is connected to the tail top device 4 through the oil pipe, the servo motor feeding device 6 is placed at the right end of the bed 2, and the longitudinal moving platform 3 is provided with longitudinal linear guide rails 31 at both ends, and the servo The motor feeding device 6 controls the longitudinal moving platform 3 to move longitudinally in the bed 2 along the longitudinal linear guide rail 31, the linear motor feeding device 7 is installed on one side of the longitudinal moving platform 3, and the rotary wheel device 8 is placed on the linear motor feeding device 7 The side towards the center of the bed 2.

Wherein, the structure of the linear motor feeding device 7 and the rotary wheel device 8 installed on one side of the longitudinal mobile platform 3 is shown in Figure 3. The linear motor feeding device 7 includes a stator 71, a mover 72 and a motor linear guide rail 73. The mover 72 is placed inside the stator and moves inside the stator 71 along the motor linear guide rail 73, and the mover 72 drives the rotary wheel device 8 to feed laterally along the motor linear guide rail 73; the rotary wheel device 8 is fixed on the rotary wheel by the rotary wheel 81 and installed Constructed on the frame 82, the rotary wheel installation frame 82 for installing the rotary wheel 81 is fixed on the mover 72 side of the linear motor feeding device 7.

The spinning forming equipment for non-circular cross-section parts of the present invention has the following working principle: after adjusting the relative position of the workpiece and the rotary wheel, start the main shaft to rotate, thereby driving the workpiece to rotate; the linear motor feeding device 7 controls the rotary wheel device 8 according to The set feed trajectory, feed speed and the actual rotation angle of the machine tool spindle perform lateral feed motion, and the rotary wheel device 8 is driven to move forward and backward several times along the machine tool lateral direction within one rotation of the main shaft. Simultaneously, the servo motor feeding device 6 controls the vertical moving platform 3 to move along the longitudinal linear guide rail 31, thereby driving the rotary wheel device 8 to carry out a longitudinal feeding motion; Realize multiple rapid forward and backward, so that the workpiece can be formed into non-circular cross-section parts after spinning.

Example 2

The spinning forming method of the non-circular cross-section parts of this embodiment is the same as that of Embodiment 1, and the working principle of the spinning forming equipment of the non-circular cross-section parts is also the same as that of Embodiment 1. Another method of the spinning forming equipment of the non-circular cross-section parts is This structure is shown in Figure 4, and the difference from Embodiment 1 lies in the structure of the rotary wheel device 8, and the addition of an inclined plane booster mechanism 10 between the linear motor feed device 7 and the rotary wheel device 8.

As shown in Figure 5, an inclined-plane booster mechanism 10 is added between the linear motor feeding device 7 and the rotary wheel device 8, wherein the inclined-plane booster mechanism 10 includes an inclined-plane propulsion block 101 and a roller 102; the rotary wheel device 8 includes a rotary wheel Seat 83, horizontal linear guide rail 84, rotary wheel mounting bracket 82 and rotary wheel 81; one end of the oblique propulsion block 101 is placed inside the stator 71 of the linear motor feeding device 7 to connect with the mover 72, and the other end is connected to the rotary wheel through the roller 102. The wheel seat 83 of the wheel device 8 is connected, and the horizontal linear guide rail 84 is arranged in the wheel seat 83, and the wheel mounting frame 82 for installing the wheel 81 is fixed on the wheel seat 83 one side.

Since the direction of motion of the rotary wheel device 8 is the transverse direction (x direction) of the machine tool, the direction of motion of the inclined plane advancing block 101 is set as along the machine tool axial direction (z direction), and the inclined plane direction of the inclined plane advancing block 101 is aligned with the machine tool axial direction. Designed as a small included angle α, the roller keeps in contact with the inclined surface of the inclined-plane push block 101; when the inclined-plane push block 101 moves along the z direction with a small force, the wedge-shaped action of the inclined surface will oppose the roller device. The movement in the x direction generates a larger propulsion force, thereby improving the forming ability of the rotary wheel device 8. The smaller the angle α, the greater the thrust force generated, but the required stroke will be greater. Therefore, if the size of the machine tool If a larger lateral propulsion force of the rotary wheel is allowed and required, a smaller angle can be selected for the included angle α.

As mentioned above, the present invention can be better realized. The above-mentioned embodiment is only a preferred embodiment of the present invention, and is not used to limit the scope of the present invention; Covered by the scope of protection required by the claims of the present invention.

Claims (6)

1. the spin forming method of an on-circular cross-section part is characterized in that, comprises the steps:

(1) on console, sets the feeding track and the feed speed of spinning roller according to the shape and size of on-circular cross-section part;

(2) workpiece is installed, is specially: earlier workpiece is stuck on the spindle nose of main shaft, drives the tail ejection device by Hydraulic Station then it is clamped; Start the servomotor feed arrangement then, regulate vertically moving the assigned address that platform makes the close workpiece of spinning roller arrival;

(3) start main axis rotation, main axis rotation drives the workpiece rotation;

(4) start the linear electric motors feed arrangement simultaneously, control spinning roller device lateral moves, and the rapport between maintenance and the main axis rotation angle, servomotor feed arrangement control simultaneously vertically moves platform drive spinning roller device and vertically moves, the length feed of spinning roller and traverse feed are carried out simultaneously, and workpiece spinning is made component shaping;

More than each step all on console, control and finish.

2. the spin forming method of on-circular cross-section part according to claim 1 is characterized in that, the feeding track of the described spinning roller of step (1) comprises the feeding number of times of the spinning roller amount of feeding and main axis rotation spinning roller during one week.

3. mould pressing equipment that is used for the on-circular cross-section part of each described method of claim 1～2, connect to form by lathe and console circuit, it is characterized in that described lathe comprises main spindle box, lathe bed, vertically moves platform, tail ejection device, servomotor feed arrangement, Hydraulic Station, linear electric motors feed arrangement and spinning roller device; Main spindle box places the lathe bed left end, the tail ejection device place the lathe bed right-hand member and with the coaxial setting of main spindle box, Hydraulic Station is connected with the tail ejection device by oil pipe, the servomotor feed arrangement places the lathe bed right-hand member, vertically move the platform two ends and be provided with vertical line slideway, the control of servomotor feed arrangement vertically moves platform line slideway lengthwise movement longitudinally in lathe bed, and the linear electric motors feed arrangement is installed on and vertically moves platform one side, and the spinning roller device places the side of linear electric motors feed arrangement towards the lathe bed center.

4. the mould pressing equipment of on-circular cross-section part according to claim 3, it is characterized in that, described linear electric motors feed arrangement comprises stator, mover and motor line slideway, mover places stator interior and moves in stator interior by the motor line slideway, and mover drives the feeding of spinning roller device lateral by the motor line slideway.

5. according to the mould pressing equipment of claim 3 or 4 described on-circular cross-section parts, it is characterized in that, described spinning roller device is fixed on the spinning roller installing rack by spinning roller and constitutes, and the spinning roller installing rack that is used to install spinning roller is fixed in mover one side of linear electric motors feed arrangement.

6. according to the mould pressing equipment of claim 3 or 4 described on-circular cross-section parts, it is characterized in that have additional the inclined-plane force-increasing mechanism between described linear electric motors feed arrangement and the spinning roller device, described inclined-plane force-increasing mechanism comprises inclined-plane forward block and roller bearing; Described spinning roller device comprises rotary wheel base, horizontal line slideway, spinning roller installing rack and spinning roller; Forward block one end in inclined-plane places the stator interior of linear electric motors feed arrangement to be connected with mover, and the other end is connected by the rotary wheel base of roller bearing with the spinning roller device, and horizontal line slideway is set in the rotary wheel base, and the spinning roller installing rack that is used to install spinning roller is fixed in rotary wheel base one side.

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