One-step forming device for extra-small bending position

Abstract

The utility model discloses an ultra-small bending position one-time forming device which comprises a bottom plate, a bending die installed in the middle of the upper portion of the bottom plate, a first extrusion assembly installed on the upper portion of the bottom plate and located on one side of the bending die, and a second extrusion assembly installed on the upper portion of the bottom plate and located on the other side of the bending die. The lower pressing plate is located above the first extrusion assembly and the second extrusion assembly and used for driving the first extrusion assembly and the second extrusion assembly, and the first extrusion assembly comprises a fixed block with the lower end arranged in a hollowed-out mode and a movable block embedded in the lower end of the fixed block and pushed by the lower pressing plate to slide towards the bending die; one end of the reset spring is embedded in the fixed block, the other end of the reset spring is embedded in the movable block, and the structure of the second extrusion assembly is consistent with that of the first extrusion assembly; the device not only can provide high-precision and high-efficiency forming treatment, but also has stability and maintainability, and is suitable for the field of precision manufacturing, in particular to production of small-bending-position workpieces.

Description

Technical Field

[0001] This utility model relates to the field of electric heating tube bending technology, specifically to a one-time forming device for very small bends. Background Technology

[0002] Electric heating tubes are widely used in heating devices. To improve the heating rate, straight electric heating tubes need to be processed into U-shaped heating tubes or other shapes. However, when existing electric heating tubes are bent into shape, they need to be bent into a U-shape first. But if the bending area is too large, the distance between the two electric heating tubes will be too large. Therefore, multiple bends are required to reduce the bending area. Currently, conventional bending devices have uneven force when dealing with small bends in the workpiece, which leads to tube deformation. In some cases, the tube may even break after extrusion due to the buffer mechanism. In addition, the extrusion mechanism is prone to deviation during operation, which cannot guarantee the stability of the equipment and the consistency of the forming quality in long-term use. This results in inaccurate bending position and angle of the electric heating tube. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a one-time forming device for ultra-small bends.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A one-time forming device for ultra-small bends includes a base plate, a bending die mounted on the center of the base plate, a first extrusion assembly mounted on the base plate and located on one side of the bending die, a second extrusion assembly mounted on the base plate and located on the other side of the bending die, and a lower pressure plate located above the first and second extrusion assemblies for driving the first and second extrusion assemblies. The first extrusion assembly includes a fixed block with a hollowed-out lower end, a movable block embedded in the lower end of the fixed block and pushed towards the bending die by the lower pressure plate, and a return spring with one end embedded in the fixed block and the other end embedded in the movable block. The structure of the second extrusion assembly is the same as that of the first extrusion assembly.

[0006] Preferably, the outer side of the fixing block has a first mounting hole.

[0007] Preferably, a spring contact block is integrally formed on the upper part of one end of the movable block, the height of the spring contact block is the same as the height of the fixed block, and a second mounting hole is provided on the side of the spring contact block facing the fixed block.

[0008] Preferably, the base plate includes a base plate body, a rectangular cavity for mounting a bending die formed in the center of the base plate body, and limiting seats for cooperating with the first extrusion assembly and the second extrusion assembly, which are symmetrically fixed to the upper two sides of the base plate body by screws.

[0009] Furthermore, a downward pressure groove is provided on the inner side of the limiting seat.

[0010] Preferably, the bending die includes an insert block and a bending template with rounded corners at both ends, which is vertically welded to the center of the insert block.

[0011] Preferably, the lower pressure plate includes a lower pressure plate body fixedly installed with an external lower pressure cylinder, lower pressure columns symmetrically welded on both sides below the lower pressure plate body, and an extrusion surface inclined at 45° on the lower inner side of the lower pressure column.

[0012] The beneficial effects of this utility model are as follows: the first extrusion component and the second extrusion component, through the cooperation of the movable block and the return spring, can uniformly apply pressure to the workpiece, avoiding deformation caused by uneven local force. The return spring prevents the movable block from shifting during operation, thereby ensuring the stability of the equipment and the consistency of forming quality in long-term use. This allows the workpiece to complete the forming of very small bends in one operation, ensuring accurate bending position and precise angle of the workpiece, meeting high precision requirements. In addition, the lower pressure groove provides a buffer space, which not only reduces the impact force during the extrusion process, but also provides a buffer space for the return spring to push the movable block back, avoiding excessive damage to the workpiece and protecting the workpiece surface and the internal components of the device. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a one-time forming device for very small bends according to the present invention;

[0014] Figure 2 for Figure 1 Exploded view;

[0015] Figure 3 for Figure 2 Structural diagram of the central fixing block;

[0016] Figure 4 for Figure 1 A diagram showing the state of the extruded workpiece during operation;

[0017] Figure 5 for Figure 1 The diagram shows the state after the compression is complete, where the reset spring pushes the movable block to reset. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0019] Example

[0020] A device for one-time forming of ultra-small bends, such as Figure 1-5As shown, it includes a base plate 1, a bending die 2 installed at the center of the base plate 1, a first extrusion assembly 3 installed above the base plate 1 and located on one side of the bending die 2, a second extrusion assembly 4 installed above the base plate 1 and located on the other side of the bending die 2, and a lower pressure plate 5 located above the first extrusion assembly 3 and the second extrusion assembly 4 and used to drive the first extrusion assembly 3 and the second extrusion assembly 4.

[0021] It should be further explained that the base plate 1, as the basic support platform of the device, provides stable support and installation position; the bending die 2, located at the center above the base plate, is the core component for bending the workpiece. The bending die is designed as an embeddable mold to precisely control the bending position and angle of the workpiece; the first extrusion assembly 3 and the second extrusion assembly 4 are located on both sides of the bending die 2 to provide extrusion force applied to the workpiece, ensuring that the workpiece receives appropriate mechanical action during the bending process. Their structures are completely identical, and the uniform application of force is ensured through the cooperation of the return spring and the movable block; the lower pressure plate 5 is installed above the bending die to drive the two extrusion assemblies, causing them to press downwards and precisely push the movable block to complete the bending of the workpiece.

[0022] The base plate 1 includes a base plate body 11, a rectangular cavity 12 for mounting the bending die 2 in the center of the base plate body 11, and limiting seats 13 for cooperating with the first extrusion assembly 3 and the second extrusion assembly 4, which are symmetrically fixed on both sides above the base plate body 11 by screws.

[0023] The inner side of the limiting seat 13 is provided with a pressing groove 131. The pressing groove 131 not only provides reset space, but its depth is also designed to match the stroke of the movable block 32 to limit overpressure and avoid mechanical interference after reset.

[0024] It needs to be further explained that the pressure groove 131 can provide a buffer space for the reset spring 33 to push the movable block 32 to reset. At the same time, the pressure groove 131 ensures that the movable block 32 still has space with the limit seat 13 after reset, which can facilitate the pressure column 52 to gradually push the movable block 32 to move towards the bending die 2 to squeeze the workpiece.

[0025] The bending die 2 includes an insert block 21 and a bending template 22 with rounded corners at both ends, which is vertically welded to the center of the insert block 21.

[0026] The first extrusion assembly 3 includes a fixed block 31 with a hollowed-out lower end, a movable block 32 that is embedded in the lower end of the fixed block 31 and is pushed and slids toward the bending die 2 by the lower pressure plate 5, and a reset spring 33 that is embedded in the fixed block 31 at one end and in the movable block 32 at the other end. The structure of the second extrusion assembly 4 is the same as that of the first extrusion assembly 3.

[0027] It should be further explained that the fixed block 31 and the movable block 32 are connected by a return spring 33. The fixed block 31 is mounted on the base plate, while the movable block 32 can slide and move closer to the bending die 2 as the lower pressure plate pushes, thus completing the extrusion of the workpiece. The return spring 33 is used to ensure that the movable block 32 can be reset when it is not subjected to external force, thereby maintaining the stability of the system and the accuracy of repeatable operation.

[0028] The outer side of the fixing block 31 is provided with a first mounting hole 311, which is specifically for mounting the reset spring 33 and can prevent the reset spring 33 from deviating during the extension and retraction process.

[0029] A spring contact block 321 is integrally formed on one end of the movable block 32. The height of the spring contact block 321 is the same as the height of the fixed block 31. A second mounting hole 322 is provided on the side of the spring contact block 321 facing the fixed block 31. Specifically, the first mounting hole 311 of the fixed block 31 and the second mounting hole 322 of the movable block 32 form a double-end positioning, which effectively solves the problem of radial offset when the spring is compressed and improves the reset stability. The design that the spring contact block 321 and the fixed block 31 are at the same height can ensure that the force axis is aligned when the spring is compressed, and avoid the risk of jamming caused by off-center load.

[0030] The lower pressure plate 5 includes a lower pressure plate body 51 fixedly installed with an external lower pressure cylinder, lower pressure columns 52 symmetrically welded to both sides below the lower pressure plate body 51, and a 45° inclined extrusion surface 53 opened at the lower inner end of the lower pressure column 52. Specifically, when the external lower pressure cylinder drives the lower pressure plate body 51 to move downward, the 45° inclined extrusion surface 53 at the lower inner end of the lower pressure column 52 first contacts the outer side of the spring contact block 321, and then gradually presses down, causing the movable block 32 to move towards the bending template 22, so that the workpiece is fully extruded to complete the one-time forming process of the small bend.

[0031] It should be further explained that the spring contact block 321 ensures good contact between the reset spring 33 and the movable block 32, while the 45° inclined pressing surface 53 at the lower inner end of the pressing column 52 makes the pressing action smoother and avoids excessive impact force from damaging the workpiece.

[0032] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A one-time forming device for ultra-small bends, comprising a base plate, a bending die mounted at the center of the base plate, a first extrusion assembly mounted above the base plate and located on one side of the bending die, a second extrusion assembly mounted above the base plate and located on the other side of the bending die, and a lower pressure plate located above the first and second extrusion assemblies and used to drive the first and second extrusion assemblies, characterized in that, The first extrusion assembly includes a fixed block with a hollowed-out lower end, a movable block that is embedded in the lower end of the fixed block and is pushed towards the bending die by the lower pressure plate, and a reset spring that is embedded in the fixed block at one end and in the movable block at the other end. The structure of the second extrusion assembly is the same as that of the first extrusion assembly.

2. The one-time forming device for ultra-small bends according to claim 1, characterized in that, The outer side of the fixing block has a first mounting hole.

3. The one-time forming device for extra-small bends according to claim 1, characterized in that, A spring contact block is integrally formed on one end of the movable block. The height of the spring contact block is the same as the height of the fixed block. A second mounting hole is provided on the side of the spring contact block facing the fixed block.

4. The one-time forming device for extra-small bends according to claim 1, characterized in that, The base plate includes a base plate body, a rectangular cavity for installing a bending die in the center of the base plate body, and limiting seats for cooperating with the first extrusion assembly and the second extrusion assembly, which are symmetrically fixed to the upper two sides of the base plate body by screws.

5. The one-time forming device for extra-small bends according to claim 4, characterized in that, The inner side of the limiting seat is provided with a pressing groove.

6. The one-time forming device for extra-small bends according to claim 1, characterized in that, The bending die includes an insert block and a bending template with rounded corners at both ends, which is vertically welded to the center of the insert block.

7. The one-time forming device for extra-small bends according to claim 1, characterized in that, The lower pressure plate includes a lower pressure plate body fixedly installed with an external lower pressure cylinder, lower pressure columns symmetrically welded on both sides below the lower pressure plate body, and an extrusion surface inclined at 45° on the lower inner side of the lower pressure column.

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