Square ring forming method and device

Abstract

The invention discloses a square ring forming method and device, and relates to the technical field of metal ring forming, and the square ring forming method comprises the steps that four points are selected at the positions, tightly attached to the inner wall of a circular to-be-machined part, in the circular to-be-machined part, and the four points are symmetrically distributed in pairs with the circle center of the circular to-be-machined part as the original point; a jacking unit is placed at each point, every two adjacent jacking units serve as a group, the two jacking units in one group move in the first direction away from the other group at the same time, meanwhile, the two jacking units in the other group move in the second direction at the same time, and the second direction is opposite to the first direction; the two sets of jacking units stretch the circular to-be-machined workpiece outwards from the inner side of the circular to-be-machined workpiece till the circular to-be-machined workpiece between every two adjacent jacking units is straightened. According to the square ring manufactured through the method and device, rounding of the four corners is formed at a time, the problem of stress concentration of a product is avoided, the forming efficiency is high, and the forming quality is good.

Description

Technical Field

[0001] The invention belongs to the technical field of metal ring forming, and particularly relates to a square ring forming method and device. Background Art

[0002] Square metal rings, also known as square rings, are annular sealing devices with a square cross-section, commonly used in sealing applications. They can provide a larger sealing surface area than traditional O-rings at a comparable cost. Square metal rings are often used for sealing and hemming of products. For example, in the industrial field, square metal rings can be used in situations where a larger sealing surface area is required, such as in hydraulic cylinders, pneumatic devices and construction machinery. They can provide good sealing effects, especially in environments with higher pressures.

[0003] In the prior art, traditional square metal rings are difficult to process and are prone to problems such as cracking, wrinkling, distortion, stress concentration, and scratches. However, the processing of circular workpieces is much simpler, mainly because circular rings are very common in industrial applications, highly standardized, and easy to obtain and replace. Therefore, the forming process of circular rings is relatively mature, and commonly used processing methods include stamping, cutting, and forming. The process flow is relatively simple and the equipment requirements are relatively low. In contrast, the processing of square rings requires more precise molds and more complex forming techniques to ensure the accuracy of their corners and edges. In addition, during the cutting and forming process of square rings, more scraps may be generated, resulting in material waste.

[0004] In view of this, it is necessary to design a forming method and a forming device for processing a circular ring into a square ring to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a square ring forming method to solve the above technical problems existing in the prior art.

[0006] To achieve the above object, in one aspect, the present invention provides a method for forming a square ring, comprising:

[0007] Select four points in the circular workpiece close to its inner wall, and the four points are symmetrically distributed in pairs with the center of the circular workpiece as the origin;

[0008] A supporting unit is placed at each point, with two adjacent supporting units forming a group, wherein two supporting units in one group move simultaneously in a first direction away from the other group, and at the same time, two supporting units in the other group move simultaneously in a second direction, the second direction being opposite to the first direction;

[0009] The two groups of supporting units respectively support the circular workpiece to be processed from the inner side thereof to open it outwards until the circular workpiece to be processed between two adjacent supporting units is straightened.

[0010] Preferably, the two supporting units in the same group move away from each other in a direction perpendicular to their movement directions while moving in the same direction.

[0011] Preferably, the four points selected in the circular workpiece to be processed are evenly distributed along the inner circumference of the circular workpiece to be processed, and the four supporting units are synchronously moved away from the center of the circular workpiece to be processed in the radial direction.

[0012] Preferably, the supporting unit has a circular outer peripheral surface connected to the circular workpiece to be processed, and its outer diameter is adjustable.

[0013] Preferably, the supporting unit is in rolling contact with the inner circumferential surface of the circular workpiece to be processed.

[0014] On the other hand, the present invention also provides a square ring forming device, which is used to execute any of the square ring forming methods described above, and the forming device includes a processing platform, on which two groups of sliding support assemblies slide in opposite directions, each group of the sliding support assemblies includes two support units, and the four support units in the two groups of sliding support assemblies are symmetrically distributed in pairs; it also includes a driving mechanism for driving the two sliding support assemblies to move closer to or away from each other; the support unit includes a profile bottom support member and a profile inner support member that can be detachably fixed at the center above the profile bottom support member, the profile inner support member has an arc-shaped outer support surface, and the four support units respectively run from the inside of the circular workpiece to be processed to the outside to process the circular workpiece to be processed into a square ring with arc chamfers.

[0015] Preferably, each group of the sliding support assemblies includes two support units that are diagonally distributed and slide in opposite directions on the processing platform, and each of the support units is connected to a driving mechanism; the four support units respectively run outward from the inner side of the circular workpiece to be processed along the diagonal direction of the square to process the circular workpiece to be processed into a square circle with circular chamfers.

[0016] Preferably, the processing platform is provided with four sliding track grooves which pass through the upper and lower parts thereof, and the sliding track grooves are symmetrically distributed in pairs with the midpoint of the processing platform as the center; the driving mechanism includes a telescopic cylinder fixedly connected to the bottom of the processing platform, and the telescopic cylinder has a telescopic rod extending along the direction of the sliding track groove, and the end of the telescopic rod away from the telescopic cylinder is fixedly connected to a sliding seat, and a sliding block is fixedly connected above the sliding seat, and the sliding block passes through the sliding track groove and is fixedly connected to the bottom support of the profile above it.

[0017] Preferably, the two profile inner support members in the same group of the sliding top support assembly are installed on the same profile bottom support member, and the facing surfaces of the two profile bottom support members are wedge-shaped surfaces. The driving mechanism includes a wedge block located between the two profile bottom support members, and the wedge block is connected to the power unit.

[0018] Preferably, the sizes of the four inner support members of the profile and the curvatures of the outer support surfaces are the same.

[0019] The present invention discloses the following technical effects:

[0020] The molding method and molding device of the present invention can prop the circular workpiece outward from the inside thereof until a square ring is formed by using a specific supporting unit and a movement mode. This method can improve the molding efficiency of the square ring and ensure the molding quality. In the molding method of the present invention, the rounding of the four corners of the square ring can be completed in a one-time molding process, which can reduce the subsequent processing steps and improve production efficiency. The square ring made by the molding method of the present invention can avoid stress concentration, thereby improving the durability and reliability of the product. The molding device of the present invention is easy to operate and control, and the outer diameter of the supporting unit is adjustable, which allows molding of circular workpieces of different sizes, increases the flexibility and application scope of the molding method, and can improve the accuracy and consistency of the square ring after molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a molding device according to an embodiment of the present invention;

[0023] Figure 2 It is a front view of a molding device according to an embodiment of the present invention;

[0024] Figure 3 A top view of a molding device according to an embodiment of the present invention;

[0025] Figure 4 It is a side view of a molding device according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the cooperation between the workpiece to be formed and the forming device in Example 1;

[0027] Figure 6 This is a schematic diagram of the cooperation between the workpiece and the forming device after forming in Example 1;

[0028] Figure 7 This is a front view of a molding device according to a second embodiment of the present invention;

[0029] Figure 8 A top view of a molding device according to a second embodiment of the present invention;

[0030] Fig. 9 It is a right side view of the molding device of the second embodiment of the present invention;

[0031] Fig.10 This is an axonometric view of a molding device according to a second embodiment of the present invention;

[0032] Fig.11 This is a schematic diagram of the cooperation between the workpiece and the forming device after forming in Example 2;

[0033] Fig.12 The principle of the molding method of the present invention is Figure 1 ;

[0034] Fig.13 The principle of the molding method of the present invention is Figure 2 .

[0035] In the figure: 1. Processing platform; 2. Sliding track groove; 3. Telescopic cylinder; 4. Telescopic rod; 5. Sliding seat; 6. Sliding block; 7. Profile bottom support; 8. Profile inner support; 9. Bolt; 10. Circular workpiece to be processed; 11. Top support unit 1; 12. Top support unit 2; 13. Top support unit 3; 14. Top support unit 4; 15. Wedge block; 16. Stop block. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Embodiment 1:

[0039] Reference Fig.12 and Fig.13 As shown, the present invention provides a method for forming a square ring, comprising:

[0040] Select four points in the circular workpiece 10 close to its inner wall, and the four points are symmetrically distributed in pairs with the center of the circular workpiece 10 as the origin, that is, the lines connecting the four points form a rectangle or a square;

[0041] Place a top support element at each point, such as Fig.12 The top support unit 11, the top support unit 2 12, the top support unit 3 13 and the top support unit 4 14 are grouped into two adjacent top support units, such as Fig.12 As shown, the two supporting units on the left side (support unit 1 11 and support unit 2 12) form a group, and the two supporting units on the right side (support unit 3 13 and support unit 4 14) form a group, wherein the two supporting units in the left side group (support unit 1 11 and support unit 2 12) simultaneously move in a first direction F1 away from the right side group, and at the same time, the two supporting units in the right side group (support unit 3 13 and support unit 4 14) simultaneously move in a second direction F2, and the second direction is opposite to the first direction;

[0042] The two groups of supporting units respectively support the circular workpiece 10 from the inside thereof to open it outwards until the circular workpiece 10 between two adjacent supporting units is straightened.

[0043] like Fig.12 As shown, in some embodiments, the distance between two top support units in the same group always remains unchanged, that is, the top support unit 1 11 and the top support unit 2 12 in the left group only move along the first direction F1 at the same time, and the top support unit 3 13 and the top support unit 4 14 in the right group only move along the second direction F3 at the same time. No matter how the two groups of top support units move, the distance between the two top support units in the same group always remains unchanged, that is, the distance between the top support unit 1 11 and the top support unit 2 12 always remains unchanged, and the distance between the top support unit 3 13 and the top support unit 4 14 always remains unchanged. This distance is the length of one side of the square ring to be formed; therefore, the forming method of this embodiment can be used to form a rectangular ring with a known and fixed length on one side.

[0044] like Fig.13As shown, in some embodiments, the two supporting units in the same group move away from each other in a direction perpendicular to the directions of their movement while moving in the same direction. That is, while supporting unit 11 is moving along the first direction F1, it is also moving along the third direction F3, and its actual moving direction is the direction of the resultant force generated by the interaction between the first direction F1 and the third direction F3, and the direction of the resultant force coincides with the radial extension line of the circular workpiece 10 to be processed. While supporting unit 2 12 is moving along the first direction F1, it is also moving along the fourth direction F4, and its actual moving direction is the direction of the resultant force generated by the interaction between the first direction F1 and the fourth direction F4, and the direction of the resultant force coincides with the radial extension line of the circular workpiece 10 to be processed. The moving direction of supporting unit 3 13 is opposite to that of supporting unit 2 12, and the moving direction of supporting unit 4 14 is opposite to that of supporting unit 1 11.

[0045] Further optimization scheme, the four points selected in the circular workpiece 10 are evenly distributed along the inner circumference of the circular workpiece 10, and the four supporting units are synchronously away from the center of the circular workpiece 10 along the radial direction of the circular workpiece 10. That is, the square formed by the connecting lines of the four supporting units is a square, and the distance between each supporting unit and the two adjacent supporting units is equal. In this way, a square circle can be processed.

[0046] In a further optimized solution, the supporting unit has a circular outer peripheral surface connected to the circular workpiece 10, and its outer diameter is adjustable. The supporting unit with a certain arc outer peripheral surface can complete the rounding of the four corners of the square ring during molding, which can eliminate stress concentration and improve processing efficiency.

[0047] According to a further optimization scheme, the supporting unit is in rolling contact with the inner circumference of the circular workpiece 10 to be processed, so as to reduce friction and avoid scratches on the inner wall of the circular workpiece 10 to be processed during the forming process.

[0048] Embodiment 2:

[0049] Reference Figures 1 to 6As shown, the second embodiment of the present invention also provides a square ring forming device for executing the above-mentioned forming method, the device includes a processing platform 1, and four sliding track grooves 2 that penetrate from top to bottom are opened on the processing platform 1 according to the forming requirements. There are supporting units sliding in the sliding track grooves 2, and the four supporting units are symmetrically distributed in pairs, wherein the sliding track grooves 2 are radially scattered with the midpoint of the processing platform 1 as the center, and the supporting units sliding in the four sliding track grooves 2 are divided into two groups, wherein two supporting units that are diagonally distributed and slide in the opposite direction form one group, forming a first sliding supporting assembly, and the other two supporting units that are diagonally distributed and slide in the opposite direction form a second sliding supporting assembly. Each supporting unit includes a profile bottom support member 7 and a profile inner support member 8 that is detachably fixed to the profile bottom support member 7, and the profile inner support member 8 has an arc-shaped outer support surface, and the profile bottom support members 7 of the four supporting units are of the same height, and each supporting unit is connected to a driving mechanism to drive it to slide back and forth along the direction of the sliding track groove 2. The four supporting units respectively move outward from the inner side of the circular workpiece 10 along the diagonal direction of the square and keep synchronous and uniform motion, so as to process the circular workpiece 10 into a square circle with circular chamfers.

[0050] Further optimization scheme, the driving mechanism includes a telescopic cylinder 3 fixed to the bottom of the processing platform 1, the telescopic cylinder 3 has a telescopic rod 4 extending along the direction of the sliding track groove 2, the end of the telescopic rod 4 away from the telescopic cylinder 3 is fixed to a slide seat 5, the upper part of the slide seat 5 is fixed to a slider 6, the slider 6 passes through the sliding track groove 2 and is fixed to the bottom support member 7 of the profile above, the slider 6 is slidably connected to the sliding track groove 2, the sliding track groove 2 provides precise guidance for the operation of the top support unit, the telescopic cylinder 3 provides power, and transmits the power to the slider 6 through the telescopic rod 4, thereby driving the top support unit to operate. It should be understood that the four telescopic cylinders 3 are electrically connected to the control end at the same time, and the control end coordinates and controls the ejection and retraction of the four telescopic cylinders 3.

[0051] In a further optimized solution, the profile inner support member 8 rotates above the profile bottom support member 7 and is fixed in axial position by bolts 9. Specifically, a rotating shaft is fixedly connected to the center above the profile bottom support member 7, and a screw hole is opened at the end of the rotating shaft away from the profile bottom support member 7. The profile inner support member 8 rotates outside the rotating shaft through a bearing. During assembly, the profile inner support member 8 and the bearing can be sleeved outside the rotating shaft first, and then a shaft sleeve can be placed above it. Then, the shaft sleeve is fixed to the end of the rotating shaft by the cooperation of the bolts 9 and the screw holes, and the shaft sleeve forms an axial limit for the profile inner support member 8.

[0052] A further optimization scheme is that the size and curvature of two adjacent top support units are the same; or, the size and curvature of the two top support units in each group of the sliding top support assemblies are the same, so as to process a product with four rounded corners and the same size in pairs.

[0053] According to a further optimization scheme, the size and curvature of the four top support units are the same, so as to produce four products with the same chamfered corner dimensions.

[0054] It should be understood that, in practical applications, the telescopic cylinder 3 may also be other driving structures or mechanical devices capable of realizing linear motion functions / rotational motion / telescopic motion, for example, it may be a servo motor, a hydraulic cylinder, an electric cylinder, and the like.

[0055] Embodiment three:

[0056] Reference Figures 7 to 11 As shown, the third embodiment of the present invention also provides another square ring forming device for executing the above-mentioned forming method, which includes a processing platform 1, and a sliding track groove 2 is opened in the center of the processing platform 1 along the length direction, which runs through the upper and lower parts. Two groups of sliding top support assemblies are slidably arranged in the sliding track groove 2. The two groups of sliding top support assemblies have the same structure and are symmetrically arranged, and both include a profile bottom support 7 and a slider located at the bottom of the profile bottom support 7. The slider is slidably matched with the sliding track groove 2. Two top support units are arranged at intervals above the profile bottom support 7 in a direction perpendicular to the sliding track groove 2. Both top support units include a profile inner support 8 that is detachably fixed to the center above the profile bottom support 7. Specifically, the profile inner support 8 is detachably mounted on the profile bottom support 7 by long bolts. The facing sides of the two bottom supports 7 are inclined wedge-shaped surfaces, and a wedge block 15 for reciprocating up and down is arranged between the two bottom supports 7 of the profiles. The two sides of the wedge block 15 facing the two bottom supports 7 of the profiles are inclined wedge-shaped surfaces. The wedge block 15 cooperates with the two bottom supports 7 of the profiles to convert the up and down reciprocating motion of the wedge block 15 into a horizontal linear motion of the two bottom supports 7 of the profiles moving away from or approaching each other. A power unit (not shown in the figure) is connected above the wedge block 15, and the power unit and the wedge block 15 together form a driving mechanism. The inner support member of the profile has an arc-shaped outer support surface, and the four top support units respectively run from the inside of the circular workpiece to be processed to the outside to process the circular workpiece to be processed into a square circle with arc chamfers.

[0057] As a further optimization solution, a spring (not shown in the figure) for resetting is arranged between the opposite sides of the sliders at the bottom of the two profile bottom support members 7 and the processing platform 1 .

[0058] According to a further optimization scheme, the distance between the two top support units in the same group of sliding top support assemblies is adjustable. Specifically, the two profile inner support members 8 can be detachably installed on the profile bottom support member 7. According to processing requirements, the distance between the two profile inner support members 8 is adjusted to form square circles of different widths.

[0059] To further optimize the solution, the two ends of the sliding track groove 2 are respectively fixed with blocks 16 for limiting the travel direction from the front of the profile bottom support 7. The block 16 is fixed to the upper surface of the processing platform 1 by bolts and is close to the height of the profile bottom support 7.

[0060] It can be understood that the forming device of Example 2 and Example 3 is only a possible device for realizing the square ring forming method of the present invention. Devices of other structures, as long as they conform to the principle of the forming method of the present invention and can realize the forming processing of the circular workpiece 10 from the inside, can be used as an alternative to Example 2 of the present invention, and no further limitation is made here.

[0061] Compared with the prior art, the square ring made by the method and device of the present invention has at least the following beneficial effects:

[0062] 1. Improving forming efficiency and quality: By using a specific supporting unit and movement mode, the circular workpiece 10 can be pushed outward from the inside until a square circle is formed. This method can improve the forming efficiency of the square circle and ensure the forming quality.

[0063] 2. One-time forming and chamfering: The chamfering of the four corners of the square ring can be completed in one forming process, which can reduce the subsequent processing steps and improve production efficiency.

[0064] 3. Avoid stress concentration: Due to the design and movement of the top support unit during the molding process, the problem of stress concentration on the square ring can be avoided, thereby improving the durability and reliability of the product.

[0065] 4. Reduce material waste: Compared with the traditional processing method of square rings that requires precise molds and complex molding technology, the method of the present invention can reduce the generation of scraps, thereby reducing material waste.

[0066] 5. Improve sealing performance: The square ring has a square cross-section and can provide a larger sealing surface area than the traditional O-ring, especially in an environment with higher pressure, it can provide a good sealing effect.

[0067] 6. Easy to operate and control: The molding device includes a processing platform 1, a sliding support assembly, and a driving mechanism. The design of these components makes the entire molding process easy to operate and control.

[0068] 7. Adjustable top support unit: The outer diameter of the top support unit is adjustable, which allows the molding of circular workpieces 10 of different sizes, increasing the flexibility and application scope of the molding method.

[0069] 8. Reduce damage to the workpiece: The top support unit rolls with the inner circumference of the circular workpiece 10 to be processed, which can reduce friction and avoid scratches on the inner wall of the workpiece during the forming process.

[0070] 9. Symmetrical distribution design: The top support units are symmetrically distributed in the circular workpiece 10 to ensure uniformity and symmetry during the forming process, thereby improving the accuracy and consistency of the square circle after forming.

[0071] The details not disclosed in the present invention are conventional technical means well known to those skilled in the art.

[0072] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0073] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A square ring forming method for processing a circular workpiece (10) into a square ring, characterized in that: include: Select four points in a position close to the inner wall of the circular workpiece (10) to be processed, wherein the four points are symmetrically distributed in pairs with the center of the circular workpiece (10) to be processed as the origin; A supporting unit is placed at each point, with two adjacent supporting units forming a group, wherein two supporting units in one group move simultaneously in a first direction away from the other group, and at the same time, two supporting units in the other group move simultaneously in a second direction, the second direction being opposite to the first direction; The two groups of supporting units respectively support the circular workpiece (10) to be processed from the inside thereof to open it outwards until the circular workpiece (10) to be processed between two adjacent supporting units is straightened.

2. The method for forming a square ring according to claim 1, characterized in that: The two supporting units in the same group move away from each other in a direction perpendicular to their movement directions while moving in the same direction.

3. The method for forming a square ring according to claim 2, characterized in that: Four points selected within the circular workpiece (10) are evenly distributed along the inner circumference of the circular workpiece (10), and the four supporting units are synchronously moved away from the center of the circular workpiece (10) along the radial direction of the circular workpiece (10).

4. The method for forming a square ring according to claim 1, characterized in that: The supporting unit has a circular outer peripheral surface connected to the circular workpiece (10) to be processed, and its outer diameter is adjustable.

5. The method for forming a square ring according to claim 1, characterized in that: The supporting unit is in rolling contact with the inner peripheral surface of the circular workpiece (10) to be processed.

6. A square ring forming device, used to perform the square ring forming method according to any one of claims 1 to 5, characterized in that: The invention comprises a processing platform (1), on which two groups of sliding support assemblies are arranged to slide in opposite directions, each group of the sliding support assemblies comprises two support units, and the four support units in the two groups of sliding support assemblies are symmetrically distributed in pairs; the invention also comprises a driving mechanism for driving the two sliding support assemblies to move closer to or farther from each other; the support units comprise a profile bottom support member (7) and a profile inner support member (8) detachably fixed at the center above the profile bottom support member (7), the profile inner support member (8) having an arc-shaped outer support surface, and the four support units respectively run from the inside of a circular workpiece (10) to the outside to process the circular workpiece (10) into a square circle with an arc chamfer.

7. The square ring forming device according to claim 6, characterized in that: Each group of the sliding support assemblies comprises two support units which are diagonally distributed and slide in opposite directions on the processing platform (1), and each of the support units is connected to a driving mechanism; the four support units respectively run outward from the inner side of the circular workpiece (10) to be processed along the diagonal direction of the square to process the circular workpiece (10) into a square circle with circular chamfers.

8. The square ring forming device according to claim 7, characterized in that: The processing platform (1) is provided with four sliding track grooves (2) penetrating the upper and lower parts thereof, and the sliding track grooves (2) are symmetrically distributed in pairs with the midpoint of the processing platform (1) as the center; the driving mechanism comprises a telescopic cylinder (3) fixedly connected to the bottom of the processing platform (1), the telescopic cylinder (3) having a telescopic rod (4) extending along the direction of the sliding track groove (2), the end of the telescopic rod (4) away from the telescopic cylinder (3) being fixedly connected to a sliding seat (5), a sliding block (6) being fixedly connected above the sliding seat (5), the sliding block (6) penetrating the sliding track groove (2) and being fixedly connected to the profile bottom support member (7) above the sliding block (6).

9. The square ring forming device according to claim 6, characterized in that: Two profile inner support members (8) in the same group of the sliding top support assembly are installed on the same profile bottom support member (7), and the two profile bottom support members (7) have a wedge-shaped surface facing each other. The driving mechanism includes a wedge-shaped block (15) located between the two profile bottom support members (7), and the wedge-shaped block is connected to a power unit.

10. The square ring forming device according to claim 9, characterized in that: The size of the four inner support members (8) of the profile and the curvature of the outer support surfaces are all the same.

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