A self-adaptive precision bending forming mold for steel tube furniture and its processing method

Abstract

This invention discloses an adaptive precision bending forming mold for steel pipe furniture and its processing method. The forming mold includes a base, with upright plates symmetrically arranged at the center of the top surface of the base, and a lower mold base between the two upright plates. A steel pipe placement groove is formed in the middle of the lower mold base, and bending forming notches with a V-shaped groove structure are symmetrically formed on the top of the lower mold base. The bending forming notches are symmetrically distributed on the front and rear sides of the steel pipe placement groove. Uprights are provided at the four corners of the top of the base, and crossbeams are fitted onto the four uprights. A first cylinder is fixedly installed on the top of the crossbeam, and the lower end of the telescopic rod of the first cylinder passes through the crossbeam and is fixedly installed on an upper template. An upper mold assembly is fixedly installed below the upper template. This invention is convenient for unloading, has a simple structure, and is easy to assemble and disassemble, possessing good practical and promotional value.

Description

Technical Field

[0001] This invention belongs to the field of hollow square tube bending technology, specifically relating to an adaptive precision bending forming mold and processing method for steel tube furniture. Background Technology

[0002] A type of hollow square cross-section thin-walled steel pipe, also known as cold-formed steel profile, possesses excellent mechanical properties, resistance to acid and alkali corrosion, weather resistance, and weldability. Therefore, it is widely used in production, construction, petrochemicals, power engineering, and machinery manufacturing. These square tubes are generally used in standard specifications, often requiring on-site secondary processing. Processing methods include welding, bending, and cutting. In practical applications, bending machines are typically used for bending.

[0003] A square tube bending and forming device according to patent CN202021143143.5 includes a lower template, an upper template, a lower support, an upper support, a lower flip plate, an upper flip plate, a lower bending plate, and an upper bending plate. Guide posts are provided at the four corners of the lower template, and guide sleeves that cooperate with the guide posts are provided at the four corners of the upper template. The lower support is installed at one end of the lower template. The lower flip plate is fixed to the lower support by a pivot pin and is rotatable. The lower bending plate has an arc-shaped end and is installed at the other end of the lower template. The upper support is installed at one end of the upper template. The upper flip plate is fixed to the upper support by a pivot pin and is rotatable. The upper bending plate has an arc-shaped end and is installed at the other end of the upper template. A square tube is placed on the lower flip plate and the lower bending plate, filled with steel balls, and has elastic plugs at both ends. When the upper template is pressed down, the lower bending plate and the upper bending plate bend the square tube. The invention reduces deformation by filling with fine steel balls and using flip plates that can rotate at both ends, while providing side baffles to prevent lateral deformation. However, the invention also has some drawbacks. For example, the waste material after bending and forming needs to be manually removed from the bending position by workers, which increases the labor intensity of workers and the structure is relatively more complicated.

[0004] Therefore, based on the above, this application provides an adaptive precision bending forming mold and processing method for steel pipe furniture. By reasonably improving and designing the overall structure of the mold, it effectively solves the technical problem of low bending and unloading efficiency in the prior art, thereby avoiding the shortcomings and defects of the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide an adaptive precision bending forming mold and processing method for steel pipe furniture. By reasonably improving and designing the overall structure of the mold, the technical problem of low bending and unloading efficiency in the prior art is effectively solved, thereby avoiding the shortcomings and defects of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a steel pipe furniture adaptive precision bending forming mold, comprising a base, wherein upright plates are symmetrically arranged at the front and back of the top surface of the base, and a lower mold base is provided between the two upright plates; a steel pipe placement groove is provided in the middle of the lower mold base, and bending forming notches with a V-shaped groove structure are symmetrically opened at the top of the lower mold base; the bending forming notches are symmetrically distributed on the front and back sides of the steel pipe placement groove; uprights are provided at the four corners of the top of the base, and crossbeams are fitted onto the four uprights; a first cylinder is fixedly installed on the top of the crossbeam, and the lower end of the telescopic rod of the first cylinder passes through the crossbeam and is fixedly installed on an upper template; an upper mold assembly is fixedly installed below the upper template.

[0007] Preferably, the front and rear sidewalls of the lower die base are symmetrically provided with threaded posts penetrating the vertical plate, and the outer end of each threaded post is provided with a locking nut for fixing the vertical plate; grooves are provided on both the left and right sides of the lower die base, and L-shaped support platforms are symmetrically provided on both the left and right sides of the top surface of the base; the horizontal section of the L-shaped structure of the support platform is inserted into the groove, and the vertical section of the L-shaped structure of each support platform is fixedly installed on the base by bolts. Because the lower die base is usually easily worn during bending and punching operations, the shape and precision of the bent steel pipe are difficult to meet the usage requirements, and its replacement is relatively frequent; the reasonable design of the threaded posts and support platforms facilitates the installation and disassembly of the lower die base, and compared with existing technologies, it has the advantage of higher installation and disassembly efficiency.

[0008] Preferably, the upper section of each column is a threaded section, and two locking nuts are provided at the threaded section of the column, with the crossbeam plate fixedly clamped between the two locking nuts. The threaded section on the column is mainly for the convenience of fixing the crossbeam plate with locking nuts; this locking nut fixing method facilitates the adjustment of the position and height of the crossbeam plate, and also facilitates the installation and disassembly of the crossbeam plate.

[0009] Preferably, the upper mold assembly includes an upper mold base installed at the lower end of the upper template, and a groove is provided at the bottom of the upper mold base; a slider is slidably installed in the groove, a forming template is fixedly installed at the lower end of the slider, and a forming die head is fixedly installed at the lower end of the forming template. The forming die head is located directly above the middle of the two bending forming notches; the upper end of the forming die head is a square column structure, and the lower end of the forming die head is a V-shaped head that matches the V-shaped groove structure of the bending forming notches. In actual production, the waste generated by the bending process is usually manually removed, which is not safe and is prone to accidents; on the other hand, it is inefficient and increases labor costs. To this end, this application uses the structural design of the slider and the groove to combine them with the forming die head, allowing the forming die head to be adjusted in position under the drive of the first cylinder and the second cylinder. In this way, the punching and bending operations of the V-shaped notches can be realized through the movement of the forming die head, and the punched waste can be pushed out and unloaded, reducing manual labor trouble, improving operational safety, and having good practical value and promotion value.

[0010] Preferably, an L-shaped extension plate is fixedly installed on the rear side wall of the upper mold base. A second cylinder is installed on the vertical section of the extension plate, and the telescopic rod of the second cylinder passes through the vertical section of the extension plate and is fixedly connected to the rear side wall of the forming template. The extension plate is mainly provided to facilitate the punching and unloading movements of the forming template and the forming die head.

[0011] Preferably, the left and right sides of the steel pipe placement groove are square groove structures for placing square steel pipes, and the middle part of the steel pipe placement groove is a V-shaped forming groove structure for bending and forming. The bottom wall of the square groove structure on both sides of the steel pipe placement groove is lower than the lowest position of the bending and forming notch, and the distance between the bottom wall of the square groove structure and the lowest position of the bending and forming notch is greater than the wall thickness of the square steel pipe. The purpose of this design is to ensure that the square steel pipe is not completely cut off during the first punching process by designing that the distance between the bottom wall of the square groove structure and the lowest position of the bending and forming notch is greater than the wall thickness of the square steel pipe, thus preserving one side wall of the square steel pipe to keep it connected as a whole. Before punching, a V-shaped notch is punched out of the square steel pipe by the forming die, which is beneficial for preparing for the subsequent bending process.

[0012] The steel tube bending processing method of the self-adaptive precision bending forming mold for steel tube furniture, as described above, includes the following specific steps:

[0013] Step S1: Completely assemble and calibrate the mold, ensuring it is clean and placed stably;

[0014] Step S2: Place the square steel pipe in the steel pipe placement slot, start the second cylinder to retract, so that the V-shaped forming groove of the steel pipe placement slot is in front of the forming die head;

[0015] Step S3: Start the first cylinder to extend downwards, so that the forming die head moves downwards and reaches the bending forming notch position, and ensure that the lower V-shaped head of the forming die head is embedded in the V-shaped groove of the bending forming notch, while the forming die head is located at the rear of the square steel pipe.

[0016] Step S4: Start the second cylinder to extend forward, which drives the slider and forming die head to move forward as a whole. The forming die head directly punches the square steel pipe placed in the steel pipe placement slot laterally, punches a V-shaped groove at the bending position of the square steel pipe, and pushes the punched waste forward and pushes it out of the bending forming notch for unloading.

[0017] Step S5: Adjust the forming die head back to the center of the steel pipe placement groove, and then drive the first cylinder to continue moving downward, driving the upper template and upper mold assembly to move slowly downward. The forming die head is inserted into the V-shaped groove punched out of the steel pipe, and the steel pipe is punched into the V-shaped forming groove structure of the steel pipe placement groove in the vertical direction, thereby completing the bending of the square steel pipe.

[0018] Due to the adoption of the above technical solution, the technical effects of this application are as follows:

[0019] On the one hand, the self-adaptive precision bending forming mold for steel pipe furniture provided in this application can adjust the position of the forming mold head through the first cylinder and the second cylinder; by starting the first cylinder to extend and move downward, the forming mold head installed under the forming template can move downward. During the downward movement of the forming mold head, in conjunction with the bending forming notch, it can perform V-groove punching and waste unloading on the steel pipe placed in the steel pipe placement groove. This can reduce the safety accidents caused by manual unloading operations, improve unloading efficiency, and reduce labor costs.

[0020] On the other hand, by combining the forming die head with the V-shaped forming groove of the steel pipe placement slot, the bending and forming of square steel pipes can be effectively realized. At the same time, the V-shaped groove formed on the square steel pipe through the first punching process can avoid the shape extrusion changes and steel pipe extrusion cracking after bending and forming, which plays a positive role in ensuring the maintenance of the bent shape of the steel pipe.

[0021] On the other hand, the structure of this invention is relatively simple compared to existing bending forming molds, and the mold is easy to install and disassemble, thus having good practical and promotional value. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0023] Figure 2 This is a side view of the installation structure of the lower mold base and support platform of the present invention;

[0024] Figure 3 This is a schematic diagram of the extension plate mounting structure of the present invention.

[0025] In the diagram: 1. Base; 2. Vertical plate; 3. Lower mold base; 4. Steel pipe placement groove; 5. Bending and forming notch; 6. Threaded column; 7. Groove; 8. Support platform; 9. Column; 10. Horizontal beam plate; 11. First cylinder; 12. Upper template; 13. Upper mold base; 14. Slide groove; 15. Sliding block; 16. Forming template; 17. Forming die head; 18. Extension plate; 19. Second cylinder. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, unless otherwise stated, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the mechanism or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] Specific embodiment 1, such as Figure 1-3 As shown:

[0029] This invention provides an adaptive precision bending forming mold for steel pipe furniture, including a base 1. The base 1 has symmetrically arranged upright plates 2 on its top surface, with a lower mold base 3 between the two upright plates 2. A steel pipe placement groove 4 is formed in the middle of the lower mold base 3, and bending forming notches 5 with a V-shaped groove structure are symmetrically formed on the top of the lower mold base 3. The bending forming notches 5 are symmetrically distributed on the front and rear sides of the steel pipe placement groove 4. Upright columns 9 are provided at the four corners of the top of the base 1, and crossbeam plates 10 are fitted onto the four upright columns 9. A first cylinder 11 is fixedly installed on the top of the crossbeam plate 10, and the lower end of the telescopic rod of the first cylinder 11 passes through the crossbeam plate 10 and is fixedly installed with an upper template 12. An upper mold assembly is fixedly installed below the upper template 12.

[0030] Preferably, the lower die base 3 has threaded posts 6 symmetrically arranged on its front and rear side walls, penetrating the vertical plate 2, and each threaded post 6 has a locking nut at its outer end for fixing the vertical plate 2; the lower die base 3 has grooves 7 on its left and right sides, and L-shaped support platforms 8 are symmetrically arranged on the left and right sides of the top surface of the base 1; the horizontal section of the L-shaped structure of the support platform 8 is inserted into the groove 7, and the vertical section of the L-shaped structure of each support platform 8 is fixedly installed on the base 1 by bolts. Because the lower die base is often easily worn during bending and punching operations, the shape and precision of the bent steel pipe are difficult to meet the usage requirements, and its replacement is relatively frequent; the reasonable design of the threaded posts 6 and support platforms 8 facilitates the installation and disassembly of the lower die base 3, and compared with existing technologies, it has the advantage of higher installation and disassembly efficiency.

[0031] Preferably, the upper section of each column 9 is a threaded section, and two locking nuts are provided at the threaded section of the column 9, with the crossbeam plate 10 fixedly clamped between the two locking nuts. The threaded section on the column 9 is mainly for the convenience of fixing the crossbeam plate 10 with locking nuts; this locking nut fixing method facilitates the adjustment of the position and height of the crossbeam plate 10, and also facilitates the installation and disassembly of the crossbeam plate 10.

[0032] Preferably, the upper mold assembly includes an upper mold base 13 installed at the lower end of the upper template 12, and a groove 14 is provided at the bottom of the upper mold base 13; a slider 15 is slidably installed in the groove 14, a forming template 16 is fixedly installed at the lower end of the slider 15, and a forming die head 17 is fixedly installed at the lower end of the forming template 16. The forming die head 17 is located directly above the middle of the two bending forming notches 5; the upper end of the forming die head 17 is a square column structure, and the lower end of the forming die head 17 is a V-shaped head that matches the V-shaped groove structure of the bending forming notches 5. In actual production, the waste generated by the bending process is usually removed manually, which is not safe and is prone to accidents; on the other hand, it is inefficient and increases labor costs. Therefore, this application uses the structural design of slider 15 and groove 14 to combine them with forming die head 17, so that forming die head 17 can be adjusted in position under the drive of first cylinder 11 and second cylinder 19. In this way, the movement of forming die head 17 can realize V-shaped punching and bending operations, and eject and unload punched waste material, reduce manual trouble, improve operation safety, and have good practical value and promotion value.

[0033] Preferably, an L-shaped extension plate 18 is fixedly provided on the rear side wall of the upper mold base 13. A second cylinder 19 is installed on the vertical section of the extension plate 18. The telescopic rod of the second cylinder 19 passes through the vertical section of the extension plate 18 and is fixedly connected to the rear side wall of the forming template 16. The extension plate 18 is mainly provided to facilitate the punching and unloading movements of the forming template 16 and the forming die head 17.

[0034] Preferably, the left and right sides of the steel pipe placement groove 4 are square groove structures 7 for placing square steel pipes, and the middle part of the steel pipe placement groove 4 is a V-shaped forming groove structure for bending and forming. The bottom wall of the square groove structure 7 on both sides of the steel pipe placement groove 4 is lower than the lowest position of the bending and forming notch 5, and the distance between the bottom wall of the square groove structure 7 of the steel pipe placement groove 4 and the lowest position of the bending and forming notch 5 is greater than the wall thickness of the square steel pipe. The purpose of this design is to ensure that the square steel pipe is not completely cut off during the first punching process by designing that the distance between the bottom wall of the square groove structure 7 of the steel pipe placement groove 4 and the lowest position of the bending and forming notch 5 is greater than the wall thickness of the square steel pipe, thus preserving one side wall of the square steel pipe to keep it connected as a whole. Before punching, a V-shaped notch is punched out of the square steel pipe by the forming die head 17, which is beneficial for preparing for the subsequent bending process.

[0035] Specific embodiment 2, such as Figure 1-3 As shown:

[0036] This invention provides a steel pipe bending process using an adaptive precision bending forming mold for steel pipe furniture, comprising the following specific steps:

[0037] Step S1: Completely assemble and calibrate the mold, ensuring it is clean and placed stably;

[0038] Step S2: Place the square steel pipe in the steel pipe placement groove 4, and start the second cylinder 19 to retract, so that the V-shaped forming groove of the steel pipe placement groove 4 is located in front of the forming die head 17.

[0039] Step S3: Start the first cylinder 11 to extend downward, so that the forming die head 17 moves downward and reaches the bending forming notch 5, and ensure that the lower V-shaped head of the forming die head 17 is embedded in the V-shaped groove of the bending forming notch 5, while the forming die head 17 is located at the rear of the square steel pipe.

[0040] Step S4: Start the second cylinder 19 to extend forward, which drives the slider 15 and the forming die head 17 to move forward as a whole. The forming die head 17 directly punches the square steel pipe placed in the steel pipe placement groove 4 laterally, punches a V-shaped groove at the bending position of the square steel pipe, and pushes the punched waste forward and pushes it out from the bending forming notch 5 for unloading.

[0041] Step S5: Adjust the forming die head 17 back to the center of the steel pipe placement groove 4, and then drive the first cylinder 11 to continue moving downward, driving the upper template 12 and the upper mold assembly to move downward slowly. The forming die head 17 is inserted into the V-shaped groove punched out of the steel pipe, and the steel pipe is punched into the V-shaped forming groove structure of the steel pipe placement groove 4 in the vertical direction, thereby completing the bending of the square steel pipe.

[0042] Due to the adoption of the above technical solution, the technical effects of this application are as follows:

[0043] On the one hand, the self-adaptive precision bending forming mold for steel pipe furniture provided in this application can adjust the position of the forming mold head 17 through the first cylinder 11 and the second cylinder 19; by starting the first cylinder 11 to extend and move downward, the forming mold head 17 installed under the forming template 16 can move downward. During the downward movement of the forming mold head 17, in conjunction with the bending forming notch 5, it can perform V-groove punching and waste unloading on the steel pipe placed in the steel pipe placement groove 4. This can reduce the safety accidents caused by manual unloading operations, improve unloading efficiency, and reduce labor costs.

[0044] On the other hand, by combining the forming die 17 with the V-shaped forming groove of the steel pipe placement groove 4, the bending and forming of the square steel pipe can be effectively realized. At the same time, the V-shaped groove formed on the square steel pipe by the first punching process can avoid the shape extrusion changes and steel pipe extrusion cracking after bending and forming, which plays a positive role in ensuring the maintenance of the bending shape of the steel pipe.

[0045] On the other hand, the structure of this invention is relatively simple compared to existing bending forming molds, and the mold is easy to install and disassemble, thus having good practical and promotional value.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel pipe bending processing method of a steel pipe furniture self-adapting precision bending forming die, characterized in that: Comprise the following specific steps: Step S1: the mold is complete installation and calibration in place, ensure the mold clean and smooth placement; Step S2: the square steel pipe is placed in the steel pipe placing groove (4), the second cylinder (19) is started to retract, the V-shaped forming groove of the steel pipe placing groove (4) is located in the front position of the forming die head (17); Step S3: the first cylinder (11) is started to extend downward, the forming die head (17) is moved downward and reaches the bending forming notch (5) position, and the lower V-shaped head of the forming die head (17) is embedded in the V-shaped groove of the bending forming notch (5), at the same time, the forming die head (17) is located at the rear of the square steel pipe; Step S4: the second cylinder (19) is started to extend forward, the slider (15) and the forming die head (17) are moved forward as a whole, the square steel pipe placed in the steel pipe placing groove (4) is directly cut by the forming die head (17), a V-shaped notch is cut at the bending position of the square steel pipe, and the cut waste is pushed forward to unload from the bending forming notch (5); Step S5: adjust the forming die head (17) to return to the middle of the steel pipe placing groove (4) directly above, then drive the first cylinder (11) to continue to move downward, drive the upper die plate (12) and the upper die assembly to move slowly downward, embed the V-shaped notch cut by the forming die head (17) into the steel pipe, and the steel pipe is punched into the V-shaped forming groove structure of the steel pipe placing groove (4) along the vertical direction, so as to complete the bending of the square steel pipe; The steel pipe furniture self-adapting precision bending forming die comprises a base (1), a vertical plate (2) is symmetrically arranged in the middle of the top surface of the base (1), and a lower die seat (3) is arranged between the two vertical plates (2); a steel pipe placing groove (4) is formed in the middle of the lower die seat (3), and a bending forming notch (5) in a V-shaped groove structure is symmetrically formed in the top of the lower die seat (3); the bending forming notches (5) are symmetrically distributed on the front and back sides of the steel pipe placing groove (4); vertical columns (9) are arranged at the four corner positions of the top of the base (1), and a cross beam plate (10) is sleeved on the four vertical columns (9); a first air cylinder (11) is fixedly installed on the top of the cross beam plate (10), the lower end of the telescopic rod of the first air cylinder (11) penetrates through the cross beam plate (10) and is fixedly installed with an upper die plate (12); an upper die assembly is fixedly installed below the upper die plate (12); the upper die assembly comprises an upper die seat (13) installed at the lower end of the upper die plate (12), and a sliding groove (14) is formed in the bottom of the upper die seat (13); a sliding block (15) is slidably installed in the sliding groove (14), and a forming die plate (16) is fixedly installed at the lower end of the sliding block (15); a forming die head (17) is fixedly installed at the lower end of the forming die plate (16), and the forming die head (17) is located directly above the middle of the two bending forming notches (5); the upper end of the forming die head (17) is in a square column structure, and the lower end of the forming die head (17) is in a V-shaped head matched with the V-shaped groove structure of the bending forming notch (5); an extension plate (18) in an L-shaped structure is fixedly arranged on the rear side wall of the upper die seat (13), a second air cylinder (19) is installed on the vertical section of the extension plate (18), and the telescopic rod of the second air cylinder (19) penetrates through the vertical section of the extension plate (18) and is fixedly connected with the rear side wall of the forming die plate (16).

2. The steel pipe bending processing method of the self-adapting precision bending forming die for the steel pipe furniture according to claim 1, characterized in that: The front and rear side walls of the lower die seat (3) are symmetrically provided with threaded columns (6) penetrating through the vertical plate (2), and the outer end of each threaded column (6) is provided with a locking nut for fixing the vertical plate (2); recesses (7) are formed in the left and right sides of the lower die seat (3), and L-shaped support tables (8) are symmetrically arranged on the left and right sides of the top surface of the base (1); the L-shaped structure horizontal section of the support table (8) is inserted into the recess (7), and the L-shaped structure vertical section of each support table (8) is fixedly installed on the base (1) through bolts.

3. The steel pipe bending processing method of the self-adapting precision bending forming die for the steel pipe furniture according to claim 1 or 2, characterized in that: The upper section of each vertical column (9) is a threaded section, two locking nuts are arranged at the threaded section position of the vertical column (9), and the cross beam plate (10) is fixedly clamped between the two locking nuts.

4. The steel pipe bending processing method of the self-adapting precision bending forming die for the steel pipe furniture according to claim 1, characterized in that: The left and right sides of the steel pipe placing groove (4) are square recess structures for placing square steel pipes, and the middle of the steel pipe placing groove (4) is a V-shaped forming groove structure for bending forming; the bottom wall position of the square recess structure of the two sides of the steel pipe placing groove (4) is lower than the lowest position of the bending forming notch (5), and the distance between the bottom wall of the square recess structure of the steel pipe placing groove (4) and the lowest position of the bending forming notch (5) is greater than the wall thickness of the square steel pipe.

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