TW201924795A - Bending servo mechanism for roll forming and bending machine using the same including a plurality of roller wheels, a plurality of servo units, and a control unit - Google Patents

Abstract

The invention relates to a bending servo mechanism for roll forming and a bending machine using the same. The bending servo mechanism includes: a plurality of roller wheels arranged at equal intervals of the full circumference in the outer periphery of the material to be rolled, wherein each roller wheels reciprocates in a linear motion direction at an oblique angle to the direction of the production line conveying the material to be rolled, so that the wheel surface of each roller wheels is obliquely pressed, supported or away from the surface of the material to be rolled; a plurality of servo units which are provided to respectively mount the roller wheels on a one-to-one basis, wherein each servo unit comprises a servo shaft and a driving member for driving the servo shaft to reciprocate the roller wheels along the linear motion direction; and a control unit electrically coupled with the driving member to control the roller wheels of each servo shaft to move independently.

Description

Curved servo mechanism for roll forming and bending machine using the same

The invention relates to a curved servo mechanism and a bending machine, in particular to a curved servo mechanism for rolling a roll to be rolled by using a plurality of independent single-axis oblique linear displacement rollers and a bending force thereof Forming machine.

Pipe fittings are widely used in industries such as locomotives, automobiles, and fitness equipment. The pipe fittings can be bent, punched, and hydraulically formed by the mold. However, the material formability and mechanical properties are accommodated, and the strength is only 980 MPa. If it is made of sheet metal, it must be welded, and the structural strength/weight ratio is also poor. On the other hand, unlike the small pipe cold bending mechanism, large (thick) pipe fittings or high-strength pipe fittings require an in-line heat treatment process, so they are all formed by roll bending. Especially in the structure of automobiles, emphasis on safety and light weight, roller forming pipe fittings has become a new trend in the pipe fittings market.

In the case of higher strength pipe fittings, in-line heat treatment is required, so the roller forming method is used. This is a 3D hot bending quenching method, and manufacturers can successfully manufacture ultra high strength pipe fittings (1500 MPa).

As shown in FIG. 1A, conventionally, a conventional roller bending apparatus 1A includes a feed roller 11 for conveying a rod pipe M, and is disposed after the feed roller 11 for positioning and stabilizing the conveying direction of the rod pipe M ( That is, the fixed roller 12 in the vertical direction of the drawing, and the fixed roller 12 disposed behind the fixed roller 12, is responsible for a plurality of corresponding horizontally moving servo rollers 13 of the roller bending bar tube M, and each horizontally moving servo roller 13 is one The horizontally moving (ie, the left-right direction in the drawing) drives the roller to move perpendicularly to the surface of the rod pipe M and roll the bar tube M, but the two servo axes are the same. Each servo axis cannot be moved separately.

As shown in FIG. 1B, another conventional roller bending apparatus 1B includes a feed roller 11 for conveying the rod pipe M, and is disposed after the feed roller 11 for positioning and stabilizing the conveying direction of the rod pipe M. After the roller 12 and the fixed roller 12 are disposed, the roller and the vertical movement of the servo roller 14 are controlled by the horizontal and vertical movement of the servo roller 14 by two servo axes (a servo axis for horizontal movement and a servo axis). The vertical movement can drive the roller to move horizontally and perpendicularly to the surface of the rod pipe M and roll the bar tube M. However, the two sets of opposite servo axes are designed in the same direction, and the respective servo axes cannot be moved separately.

In the conventional roller bending apparatus of the prior art described above, two servo shafts are required for each roller, and if the 3D elbow is formed, the servo shaft needs to be more than six, and the equipment is complicated and expensive.

SUMMARY OF THE INVENTION The object of the present invention is to control a roll of a single servo shaft to move obliquely linearly with the surface of the pipe to be machined in a single servo shaft to perform complex bending forming operations with a minimum number of servo axes. It is still another object of the present invention to provide a bending machine that performs a complicated bending forming operation with a minimum number of servo axes.

For the purpose of achieving the above-described curved servo mechanism, the technical means provided by the present invention is a roll-formed curved servo mechanism comprising: a plurality of rollers and corresponding servo units, and a control unit. a plurality of rollers are respectively disposed at equal intervals on the periphery of the material to be rolled which are to be subjected to roll bending, and each roller reciprocates in a linear motion direction of an oblique angle, so that the wheel surface of each roller is inclined Pressing, supporting or away from the surface of the material to be rolled; a plurality of servo units are respectively provided for the roller by one-to-one, each servo unit includes a servo shaft and a driving member, and the driving member drives the servo shaft to make the roller edge The linear actuating direction reciprocates; the control unit is electrically coupled to the driving member for control The rollers of the respective servo axes are independently moved.

In one embodiment, the rollers are three rollers that are at an angle of 120 degrees to each other, and each roller is connected by a servo shaft.

In one embodiment, the rollers are four rollers that are at an angle of 90 degrees to each other, and each roller is connected by a servo shaft.

In one embodiment, the bevel angle is an angle of less than 90 degrees to the roll to be conveyed in the direction of the production line.

In one embodiment, the material to be rolled is a tube or a tube.

For the purpose of achieving the above-mentioned bending machine, the technical means provided by the present invention is a roll forming machine, comprising: a feeding wheel set comprising a pair of diametrically opposed rollers for holding a roll to be rolled. Transporting along a production line; a fixed wheel set is disposed at the feed output end of the feed wheel set, and includes a pair of unpowered opposite rolls for providing the roll to be rolled along the line direction And a curved servo mechanism for rolling the material to be rolled conveyed along the line direction.

In an embodiment of a roll mill, the fixed wheel set and the curved servo mechanism further comprise a high frequency heating unit.

The characteristics of this creation are: the creation adopts the bevel roller servo design, each roller only needs to be equipped with one servo shaft, and its action direction is inclined at an oblique angle with the feeding direction of the material to be rolled, with the corresponding roller and By calculating the control unit for applying the internal curvature and the external curvature of the material to be rolled and controlling the movement path of the servo shaft and the pressing force and time, the complicated elbow shape and the different tube cross sections can be completed; the curved servo mechanism by the present creation Adjusting the position of the inclination direction, it is possible to apply force to the pipe material to bend it, and it can be seen from the direction of the inclination that the direction of the force applied by the roller is at a small angle with the bending direction of the pipe, The bending stress in the forming process is smooth and the bending curvature is small (the traditional method of using the left and right sets of servo rollers is adopted, the two sets of rollers are designed in the same direction, and the moving direction is perpendicular to the traveling direction of the tube, so the curvature of the bending tube is limited) Moreover, the pipe section can be changed and processed (compared to the pipe section deformation process which cannot be obtained by the conventional pipe bending mechanism), so the creation has the advantages of low equipment cost and wide application range.

1A, 1B‧‧‧Knowledge roller bending equipment

11‧‧‧Feed roller

12‧‧‧Fixed rolls

13‧‧‧Horizontal moving servo roller

14‧‧‧ horizontal and vertical moving servo rolls

2‧‧‧Shaped Servo Mechanism

21‧‧‧Roller

21a‧‧‧round roller set

21b‧‧‧Up and down roller

211‧‧‧French

22‧‧‧Servo unit

221‧‧‧Servo axis

222‧‧‧ drive parts

23‧‧‧Control unit

3‧‧‧Cutting machine

31‧‧‧Feeding wheel set

311‧‧‧Roller

32‧‧‧Fixed wheel set

321‧‧‧Roller

33‧‧‧High frequency heating unit

A1, A2‧‧‧ bevel

L1‧‧‧ production line direction

L2‧‧‧Line motion direction

M‧‧‧ rod pipe

W‧‧‧Before rolling

W1‧‧‧ central axis

1A is a schematic view of a roll bending process of a conventional roller bending apparatus of the prior art; FIG. 1B is a schematic view of a roll bending process of another conventional roller bending apparatus of the prior art; FIG. 2 is a main embodiment of the present invention; FIG. 3 is a schematic view showing a roll bending process of a bending machine including a curved servo mechanism according to an embodiment of the present invention; FIG. 4 is a heat roller type including a curved servo mechanism according to an embodiment of the present invention; Schematic diagram of the roll bending process of the curved machine.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings in which the drawings The components shown are not drawn in the number, shape, size ratio, etc. at the time of implementation, and the actual size of the implementation is a selective design, and the component layout form may be more complicated.

First, please refer to FIG. 2 and FIG. 3. The curved servo mechanism 2 for roll forming of the present embodiment is mainly used for roll bending a material to be rolled W which is conveyed along a line direction L1 (the material to be rolled W can be a pipe, a bar or a plate, The cross-sectional shape may be rectangular or circular, and the curved servo mechanism 2 includes a plurality of rollers 21, a plurality of servo units 22, and a control unit 23. The plurality of rollers 21 They are respectively disposed in the peripheral region of the to-be-rolled material W to be subjected to roll bending in the curved servo mechanism 2 along the line direction L1, and the servo shafts 221 of the respective rollers 21 are combined with each other. The line direction L1 of the material to be rolled W is reciprocated in a linear operating direction L2 at an oblique angle (A1, A2), so that one of the rolls 211 of each roller 21 is obliquely pressed, supported or moved away from the to-be-rolled roller. Preferably, the servo shafts 221 of the plurality of rollers 21 are respectively disposed at equal intervals with the entire circumference of the section of the roll to be rolled W (when the servo shafts 221 of the rollers 21 are at When the cross-section of the material to be rolled W is 120 degrees from each other, the three servo shafts 221 have three rollers 21, and when the servo shafts 221 of the rollers 21 are on the cross section of the material W to be rolled When the angle is 90 degrees, the four servo shafts 221 are provided with four rollers 21); the plurality of servo units 22, each of the servo units 22 includes a servo shaft 221 and a driving member 222, and the servo shaft 221 One-to-one is provided for each of the rollers 21, and the driving member 222 (generally using a hydraulic pump) drives the servo shaft 221 to make the roller 21 along the straight line. The direction L2 is reciprocated to change the curvature of the material to be rolled W by the corresponding roller 21 to obliquely roll the material to be rolled; the control unit 23 is electrically coupled to the roller The driving member 222 controls the rollers of the respective servo shafts 221 to move independently.

In one embodiment, the bevel angle (A1, A2) is an angle of less than 90 degrees with respect to the central axis W1 of the material to be rolled W or the surface thereof conveyed in the line direction L1 to form an effective bending moment. In an embodiment, as shown in FIG. 2 and FIG. 3, in an embodiment, the servo shafts 221 of the plurality of rollers 21 are disposed in pairs, respectively, and are less than 90 degrees from the central axis of the material to be rolled. The same angle angle is set. For example, in FIG. 2 and FIG. 3, the bevel angle A1 and the bevel angle A2 of the servo shaft 221 of the left and right roller set 21a are the same angle, but the other set of upper and lower roller sets 21b are sandwiched by the servo shaft 221. The bevel angles are identical to each other, but may be different angles from the bevel angle A1 or the bevel angle A2.

As can be seen from the above embodiment, the servo unit 22 of the present invention and the roller 21 are located The two sides of the rolled material W (for example, the left, right or upper and lower sides) are adjusted by the servo shaft 221 of the servo unit 22 to adjust the position of the roller 21 in the linear actuating direction L2, and can be individually controlled by the linear actuating direction L2. The roller 21 is smoothly applied to the outer and inner curvatures of the material to be rolled to bend it to achieve various desired curved shapes. It can be seen from the linear actuating direction L2 that the direction of the force applied by the roller 21 is at a small angle (ie, the bevel angle A1, A2) with the direction of the bending of the material to be rolled W, which can make the forming process smooth and can achieve a smaller bending curvature, and can even be performed. The pipe section deformation process that cannot be performed by the conventional pipe bending mechanism.

In addition, please refer to Figure 3. The structure of the roll forming machine 3 of the present embodiment comprises: a feeding wheel set 31 comprising a pair of diametrically opposed rollers 311 for holding the material to be rolled W to be conveyed along the line direction L1; The wheel set 32 is disposed on the feed output side of the feed wheel set 31, and includes a pair of unpowered opposite rollers 321 for providing the to-be-rolled material W to travel along the line direction L1; The curved servo mechanism 2 according to each of the foregoing embodiments is configured to roll the material to be rolled W which is fed from the feed output side of the fixed wheel set 32 and conveyed along the line direction L1.

In an embodiment, in order to be suitable for the high-rigidity to be rolled, the present invention further provides a high-frequency heating unit 33 between the fixed wheel set 32 and the curved servo mechanism 2 to be placed on the roller. The rolled material W is heated to a preferred formability before the roll W roll is bent to facilitate the roll bending operation.

The above-described embodiments are merely illustrative of the principles, features, and effects of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art can recite the above without departing from the spirit and scope of the present invention. The embodiment is modified and changed. Any equivalent changes and modifications made by the disclosure of the present invention should still be covered by the following claims. Therefore, the scope of protection of the present invention should be as set forth in the scope of the patent application.

Claims (9)

A curved servo mechanism is used for rolling a material to be rolled which is conveyed along a line direction. The curved servo mechanism comprises: a plurality of rollers respectively disposed on the roll to be rolled. Around the material, each of the rollers reciprocates in a linear operating direction at an oblique angle to the direction of the line to be conveyed by the material to be rolled, so that one of the rolls is obliquely pressed, supported or moved away from the rolling. a plurality of servo units, each of the servo units includes a pair of one-to-one servo shafts for the rollers and a driving member for driving the servo shaft to reciprocate the roller along the linear actuation direction; And a control unit electrically coupling the driving members to control the independent movement of the rollers of the respective servo axes. The curved servo mechanism according to claim 1, wherein the plurality of roller trains are respectively disposed at equal angles at intervals of the entire circumference of the section of the material to be rolled. The curved servo mechanism of claim 2, wherein each of the rollers is connected by a servo shaft, and the roller servo axes are at an angle of 120 degrees with each other. The curved servo mechanism of claim 1, wherein the servo shafts of the plurality of rollers are disposed in pairs at an angle of less than 90 degrees with respect to a central axis of the material to be rolled. . The curved servo mechanism according to claim 2, wherein each of the rollers is connected by a servo shaft, and the servo axes of the rollers are at an angle of 90 degrees with each other. The curved servo mechanism according to claim 1, wherein the oblique angle is an angle of less than 90 degrees with the material to be rolled conveyed in the direction of the production line. The curved servo mechanism according to claim 1, wherein the material to be rolled is a pipe, a bar or a plate. A roll forming bending machine comprising: a feeding wheel set comprising a pair of directional power rollers for holding the rolled material to be conveyed along a production line direction; and a fixed wheel set disposed at the feeding a feed output side of the wheel set, comprising a pair of unpowered opposite rollers for providing the material to be rolled to travel along the line direction; and as in any one of claims 1 to 4 of the patent application The curved servo mechanism is configured to roll the material to be rolled which is sent from the feed output side of the fixed wheel set and conveyed along the line direction. The roll forming machine according to claim 8, wherein the fixed wheel set and the curved servo mechanism further comprise a high frequency heating unit.