Two-stroke self-flanging forming die and flanging equipment comprising same

Abstract

The utility model provides a two-stroke self-flanging forming die and flanging equipment comprising the two-stroke self-flanging forming die, relates to the technical field of dies, and solves the technical problems that a flanging die is unreasonable in structure, the top of a flanging hole is uneven, the matching effect is poor, and the welding quality is abnormal. The two-stroke self-flanging forming die comprises a first-stage flanging head and a second-stage flanging head, the first-stage flanging head is used for carrying out first-stage pre-forming on a flanging hole; the second-stage flanging head is arranged below the first-stage flanging head and is used for carrying out second-stage final forming on a flanging hole; the top of the first-stage flanging head is provided with an arc-shaped concave surface; an inclined flow guide surface is arranged at the joint of the first-stage flanging head and the second-stage flanging head; and the second-stage flanging head is of a cylinder structure with taper. According to the utility model, through the synergistic effect of the arc-shaped recess, the inclined flow guide surface and the tapered gap, the quantitative relationship between the material flowing speed and the accumulation amount is established, and accurate compensation is realized, so that a flanged hole is in a flat opening shape, and the flanging effect and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould technical field especially is concerned with a two -stroke self -flanging forming die and contains its flanging equipment. BACKGROUND

[0002] As Figure 1 Shown, need to carry out pipe welding to the pipeline of production when producing the pipe -through cooperation pipeline assembly, and an important factor that influences pipeline welding is that the pipe fitting degree, effective cooperation length and its uniformity, to improve the cooperation between the pipeline (the gap and length after two pipeline cooperation), it is necessary to solve the pipe positioning difficulty, the accuracy of pipe positioning depends on the positioning point of pipeline and the flanging state of copper pipe, the positioning point can adopt the convex point positioning mode to easily solve, so the quality, size, height etc.

[0003] The applicant finds that the prior art at least has the following technical problems: as Figure 1 And Figure 2 Shown, the flanging hole is processed at present using the punching round hole process and is processed using a round punch die, this process will lead to uneven flanging hole platform, the height of both sides of the punched flanging hole is low, leading to the crescent shape of the flanging hole. The cooperation effect of the crescent flanging hole and the branch pipe is poor, leading to abnormal welding quality. Therefore, it is urgent to develop a new type of flanging forming die. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing a two -stroke self -flanging forming die and containing its forming equipment, to solve the unreasonable structure of the flanging die in the prior art, the uneven top of the flanging hole, the poor cooperation effect, the abnormal welding quality technical problem.

[0005] In order to realize the above -mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a two -stroke self -flanging forming die, including primary flanging head, secondary flanging head, wherein:

[0007] The primary flanging head is used for carrying out the primary primary forming of the flanging hole;

[0008] The secondary flanging head is arranged below the primary flanging head and is used for carrying out the secondary final forming of the flanging hole;

[0009] The primary flanging head top has arc concave surface.

[0010] The two-stroke self-flanging forming die provided by the utility model has the arc-shaped recessed structure arranged on the top of the first flanging head, forms the central material guiding area, guides the material to flow to the center quickly through the recessed structure, improves the material flow speed by 20%-30% (compared with the traditional process), fills the recessed area quickly, offsets the problem of insufficient material accumulation in the center in the traditional process, maximally guarantees the manufacturing precision, integrity and consistency of the pipe sidewall processing, solves the problem of unevenness of the flanging hole top, maximally improves the branch pipe interface quality strength and sealing performance in the subsequent process, and has a strong promotion and guarantee on the product quality reliability of the whole machine.

[0011] As a further improvement of the utility model, the arc-shaped recessed surface plan view is an ellipse, the long diameter corresponds to the low side, and the short diameter corresponds to the high side.

[0012] As a further improvement of the utility model, the depth of the arc-shaped recessed surface is 0.3-0.8 mm.

[0013] As a further improvement of the utility model, the arc of the arc-shaped recessed surface is R2-R5.

[0014] As a further improvement of the utility model, the first flanging head and the second flanging head are provided with the inclined flow guide surface at the connection position.

[0015] The utility model discloses a kind of flanging equipment, including the two-stroke self-flanging forming die.

[0016] As a further improvement of the utility model, the inclination angle of the inclined flow guide surface is 20°-45°.

[0017] As a further improvement of the utility model, the second flanging head is a cylindrical structure with taper.

[0018] The utility model discloses a kind of flanging equipment, including the two-stroke self-flanging forming die.

[0019] As a further improvement of the utility model, the diameter difference between the top and bottom of the second flanging head is 0.1-0.3 mm.

[0020] The utility model provides a kind of flanging equipment, including the two-stroke self-flanging forming die.

[0021] As further improvement of the utility model, still include workbench, flanging control module, wherein:

[0022] The flanging control module is fixed on the workbench;

[0023] The two-stroke self-flanging forming die is installed in the flanging control module and can perform pipeline flanging forming under the control of the flanging control module. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0025] Figure 1 It is the structure schematic view of the flanging hole in the pipeline in the prior art;

[0026] Figure 2 It is the structure schematic view of the two-stroke self-flanging forming die in the prior art;

[0027] Figure 3 It is the structure schematic view of the two-stroke self-flanging forming die of the utility model;

[0028] Figure 4 It is the top view of the two-stroke self-flanging forming die of the utility model;

[0029] Figure 5 It is the structure schematic view of the two-stroke self-flanging forming die of the utility model when being placed in the copper pipe and preparing to process the flanging hole;

[0030] Figure 6 It is the front view of the copper pipe flanging hole processed by the two-stroke self-flanging forming die;

[0031] Figure 7 It is the three-dimensional structure schematic view of the copper pipe flanging hole processed by the two-stroke self-flanging forming die;

[0032] Figure 8 It is the three-dimensional structure schematic view of the flanging equipment of the utility model (one);

[0033] Figure 9 It is the front view of the flanging equipment of the utility model;

[0034] Figure 10 It is the top view of the flanging equipment of the utility model;

[0035] Figure 11This is a side view of the flange-flanging device of this utility model;

[0036] Figure 12 This is a three-dimensional structural schematic diagram (II) of the flange-flanging device of this utility model;

[0037] Figure 13 This is an exploded structural diagram (I) of the flange-flanging device of this utility model;

[0038] Figure 14 This is an exploded structural diagram (II) of the flange-flanging device of this utility model;

[0039] Figure 15 This is a schematic diagram of the structure when the flanged hole of the copper tube after processing by the two-stroke self-flanging forming mold of this utility model is welded together with the piping.

[0040] In the diagram: 1. Primary flanging head; 2. Secondary flanging head; 3. Arc-shaped concave surface; 4. Inclined guide surface; 100. Flanging hole; 200. Worktable; 300. Flanging control module; 301. Slider A; 302. Cylinder mounting seat; 303. Sliding guide rail A; 304. Core rod mounting seat base plate; 305. Sliding guide rail B; 306. Slider B; 307. Push-pull rod mounting seat; 308. Limiting plate; 309. Positioning seat; 310. Rod; 311. Cylinder B; 312. Core rod head; 313. Push-pull rod A; 314. Cylinder nut; 315. Clamping mold fixing seat; 316. Replaceable clamping mold; 317. Clamping mold seat slider; 318. Cylinder A; 319. Cylinder mounting seat B; 320. Tail box; Two-stroke self-flanging forming mold 400. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] Example 1:

[0043] like Figures 3-7 As shown, this utility model provides a two-stroke self-flanging forming die, including a primary flanging head 1 and a secondary flanging head 2 that are sequentially arranged and integrally formed; wherein:

[0044] The first-stage flanging head 1 is used for the initial forming of the flanging hole. Specifically, a small round hole is processed using the first-stage flanging head 1.

[0045] The secondary flanging head is arranged below the primary flanging head and is used for secondary final forming of the flanged hole, and specifically, the secondary flanging head 2 is used to continue to expand the hole and flange at the machined small round hole to finally form the required flanged hole 100.

[0046] The primary flanging head 1 has an arc-shaped recessed surface 3 at the top.

[0047] The two-stroke self-flanging forming die has the arc-shaped recessed structure at the top of the primary flanging head 1 to form a central material guiding area, the material is guided to flow rapidly to the center through the recessed structure, the material flow speed is improved by 20%-30% (compared with the traditional process), the recessed area is rapidly filled, the problem of insufficient material accumulation in the center in the traditional process is offset, the manufacturing precision and integrity and consistency of the pipe sidewall machining are maximally guaranteed, the problem of unevenness of the top of the flanged hole is solved, and the quality strength and sealing performance of the branch pipe interface in the subsequent machining process are maximally improved, which effectively promotes and guarantees the product quality reliability of the whole machine.

[0048] As a further improvement of the utility model, the arc-shaped recessed surface 3 is in the shape of an ellipse in the plan view, the long diameter corresponds to the low side, and the short diameter corresponds to the high side. Figure 5 As shown in the figure, the arc-shaped contour of the primary flanging head 1 protruding outward at the top is the contour of the side corresponding to the short diameter. Specifically, the arc-shaped recessed surface 3 and the top surface are non-circular structures, and an asymmetric structure is arranged to form differential regulation of the material flow speed. The asymmetry here refers to the length and width of the arc-shaped recessed surface 3 being different, for example, the long diameter of the arc-shaped recessed surface 3 is 5.8 mm, and the short diameter is 4.6 mm. The diameter of the secondary flanging head 2 is 7.3 mm.

[0049] As an optional embodiment of the utility model, the depth of the arc-shaped recessed surface 3 is 0.3-0.8 mm, and the curvature of the arc-shaped recessed surface 3 is R2-R5. It should be noted that the specifications of the depth, curvature, long diameter, and short diameter of the arc-shaped recessed surface 3 are all set according to the required flanged hole specifications, and when the flanged hole specifications change, the specifications of the arc-shaped recessed surface 3 should also be adjusted accordingly. In order to mass-produce flanged holes on copper pipes of different specifications, the two-stroke self-flanging forming die in the utility model should be prepared in several sets to process copper pipes of different diameters and flanged holes of different diameters.

[0050] In order to further ensure the quality of the flanged hole, an inclined flow guide surface 4 is arranged at the connection between the primary flanging head 1 and the secondary flanging head 2 in the embodiment. Further, the inclination angle of the inclined flow guide surface is 20°-45°.

[0051] This invention creates a lateral compensation zone by setting an inclined guide surface. By designing the angle, the material is forced to accumulate on both sides of the flange hole, increasing the material accumulation by 15%-25% and forming a uniform height platform, thus compensating for the deficiency of insufficient height on both sides in traditional processes.

[0052] To further ensure the quality of the flanging hole, in this embodiment, the secondary flanging head 4 is a cylindrical structure with a tapered shape. Furthermore, the diameter difference between the top and bottom of the secondary flanging head is 0.1-0.3 mm.

[0053] This invention sets the secondary flanging head into a structure with a certain taper to form an edge transition zone. The edge is configured with a gradually narrowing gap of 0.1-0.3mm to limit the lateral overflow of material, ensure a smooth transition of the flanging edge, avoid the generation of burrs, and finally form a flanging hole with a flatness of ≤0.05mm (0.2-0.5mm in traditional processes), thus achieving a flat-top flanging structure.

[0054] In existing technology, due to mold structure issues, the top of the flanged hole 100 is uneven. The old mold has a circular top and bottom structure. During flangering, the small hole structure protruding from the top edge forms the circular shape of the flanged head. When subjected to an upward force from the bottom of the mold, the copper tube is pushed upwards to a certain flange height. At this point, the outward flange height of the copper tube is the distance from its lowest to its highest point. Since the copper tube material is uniform throughout, the outward flange height is consistent, resulting in... Figure 1 and Figure 2 As shown, the top of the flanged hole 100 is crescent-shaped, with a lower middle and higher ends. Due to the unevenness of the flanged hole, the positioning point of the piping is not consistent, causing the piping angle to be skewed, which will affect the welding quality, joint strength, and thus the overall performance of the machine. This utility model provides a two-stroke self-flanging forming mold, which is a forming mold integrating filling, flanging, and forming of air conditioning pipe parts. The top structure is elliptical and the bottom is circular. It adopts a three-level progressive compensation design. The first level is the central material guiding area: the top center of the first-level flanged head 1 is provided with an arc-shaped concave area 3 (R2-R5mm, depth 0.3-0.8mm). The concave structure guides the material to flow quickly towards the center, offsetting the accumulation of material in the center in the traditional process. To address shortcomings, the material flow rate is increased by 20%-30% (compared to traditional processes), quickly filling the recessed area; the second-level lateral compensation zone: 20°-45° inclined guide surfaces 3 are set on both sides, and the material is forced to accumulate on both sides of the flange hole through angle design, compensating for the insufficient height on both sides in the traditional process, increasing the material accumulation by 15%-25%, forming a uniform height platform; the third-level edge transition zone: a 0.1-0.3mm gradually narrowing gap is configured at the edge of the second-level flange head 2 to limit the lateral overflow of material, ensure a smooth transition of the flange edge, avoid burr generation, and finally form a flange hole flatness ≤0.05mm (0.2-0.5mm in the traditional process), achieving a flat-top flange structure.

[0055] In use, the oval structure of the top of the flanging head pushes out the small hole structure which is also oval, and when the upward force of the bottom of the flanging head is received, the copper pipe is pushed upward by a certain flanging height, at this time, the outward flanging height of the copper pipe is the distance from the lowest position of the copper pipe to the highest position, and since the small hole is oval, the copper pipe material at the lowest position is more than that at the center of the flanging hole, so the outward flanging height of the copper pipe at the lowest position is greater than that at the center, thereby forming the flat hole type flanging hole 100 as shown in Figure 6 and Figure 7 .

[0056] The utility model breaks through the symmetrical stamping concept: the traditional die adopts symmetrical structure, which leads to uniform material flow but cannot compensate for edge collapse. The utility model actively guides the material to flow to a specific area through the structure design of asymmetric partition (different length and width), solving the crescent-shaped defect. Quantitative material flow control: through the synergistic effect of arc-shaped recess, inclined flow guide surface and tapered gap, the quantitative relationship between material flow speed and accumulation is established, and accurate compensation is realized.

[0057] Embodiment 2:

[0058] As shown in Figures 8-15 , the utility model provides a kind of flanging equipment, including above-mentioned two-stroke self-flanging forming die 400.

[0059] Further, the flanging equipment further includes a workbench 200 and a flanging control module 300.

[0060] The flanging control module 300 is fixed on the workbench 200.

[0061] The two-stroke self-flanging forming die 400 is installed in the flanging control module 300, and can form the pipe flanging hole 100 under the control of the flanging control module 300.

[0062] Specifically, the flanging control module 300 includes a sliding block A 301, a cylinder mounting seat 302, a sliding guide rail A 303, a core rod mounting seat bottom plate 304, a sliding guide rail B 305, a sliding block B 306, a push-pull rod mounting seat 307, a limiting plate 308, a positioning seat 309, a rod 310, a cylinder B 311, a core rod head 312, a push-pull rod A 313, a two-stroke self-flanging forming die 400, a cylinder nut 314, a die clamping fixing seat 315, a replaceable die clamp 316, a die clamp seat sliding block 317, a cylinder A 318, a cylinder mounting seat B 319, and a tail material box 320.

[0063] The cylinder A 318 is installed on the workbench 200 through the cylinder mounting seat 302; the output end of the cylinder A 318 is connected with the sliding block A 301, and can drive the sliding block A 301 to move back and forth; the sliding block A 301 is connected with the output end of the cylinder A 318 through the cylinder nut 314 in a locking mode; the sliding block A 301 is in a U shape, and the bottom of the sliding block A 301 is slidably connected to the workbench 200 through the sliding sliding rail A 303; a clamping groove is arranged on one free arm of the sliding block A 301, a push-pull rod mounting seat 307 is clamped in the clamping groove, a push-pull rod A 313 is arranged on the push-pull rod mounting seat 307, and a locking structure is arranged on the other side of the push-pull rod mounting seat 307, so that the push-pull rod A 313 can move back and forth along with the sliding block A 301 when the sliding block A 301 moves back and forth; one end of the rod 310 is connected with the locking structure, the other end passes through the sliding block B 306 and is connected with the core rod head 312; the sliding block B 306 is fixed in the positioning seat 309, the positioning seat 309 is fixed on the workbench 200 through the core rod mounting seat bottom plate 304, and the core rod mounting seat bottom plate 304 is slidably arranged on the workbench 200 through the sliding sliding rail B 305, so that the core rod mounting seat bottom plate 304 can move back and forth; a locking nut is arranged on the sliding block B 306, so as to lock the sliding block B 306, the rod 310 and the positioning seat 309 together; in order to prevent the sliding block B 306 from being pulled out of the positioning seat 309, a limiting plate 308 is arranged on one side of the positioning seat 309; the other end of the workbench 200 is provided with a cylinder mounting seat B 319, and the cylinder B 311 is fixed on the workbench 200 through the cylinder mounting seat B 319; the number of the cylinder B 311 is two and the two are symmetrically arranged; the mold clamping fixing seat 315 is slidably arranged on the workbench 200 through the mold clamping seat sliding block 317, and the output end of the cylinder B 311 is connected with the mold clamping fixing seat 315; the replaceable mold 316 is clamped between the two mold clamping fixing seats 315, and the core rod head 312 is arranged in the replaceable mold 316; the two-stroke self-flanging forming die 400 is installed between the rod 310 and the core rod head 312; since the core rod head 312 is fixed in the replaceable mold 316, when the rod 310 moves back and forth, it will push the two-stroke self-flanging forming die 400 up and down under the action of the inclined surface, so as to realize the processing and forming of the flanged hole 100.

[0064] Method for use: the rod 310 pushes the angle dovetail groove at the bottom of the two-stroke self-flanging forming die 400, so that the two-stroke self-flanging forming die 400 moves up and down in the core rod head 312 (guide sleeve). Thus, the two-stroke self-flanging forming die 400 is pushed out of the small hole from the inside to the outside of the copper pipe under the influence of the top corner, and then the bottom of the two-stroke self-flanging forming die 400 is continuously pushed out under the influence of the upward and downward forces, so that the metal copper pipe is stretched, and finally the flanged hole processing is completed.

[0065] Compared with the old copper pipe flanging hole forming die, the old forming die has uneven flanging when flanging the copper pipe, the height is not uniform, the flanging hole needs to be corrected when welding, which affects the use after welding. The new two-stroke self-flanging forming die 400 is oval at the top and circular at the bottom, which is oval when ejecting small holes, and has enough copper pipe material at the lowest part of the flanging hole for flanging, so that the flanging hole shape is flat, the flanging effect and stability are improved. It is beneficial to the positioning of the welded product and reduces the height difference between the flanged products. The new two-stroke self-flanging forming die 400 is to ensure that the flanging hole shape is flat, and to avoid the above quality problems.

[0066] First of all, it should be noted that "inward" is the direction towards the center of the accommodation space, and "outward" is the direction away from the center of the accommodation space.

[0067] In the description of the utility model, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the drawings of the utility model and are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. Figure 1

[0068] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0069] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0070] ​In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0071] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0072] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A two-stroke self-flanging forming die, characterized in that, Includes primary flange heads and secondary flange heads; among which: The first-stage flanging head is used for the initial shaping of the flanging hole; The secondary flanging head is located below the primary flanging head and is used for the secondary final forming of the flanging hole; The top of the first-level flange head has an arc-shaped concave surface.

2. The two-stroke self-flanging forming die according to claim 1, characterized in that, The top view of the arc-shaped concave surface is elliptical, with the major axis corresponding to the lower side and the minor axis corresponding to the higher side.

3. The two-stroke self-flanging forming die according to claim 1, characterized in that, The depth of the arc-shaped concave surface is 0.3-0.8 mm.

4. The two-stroke self-flanging forming die according to claim 1, characterized in that, The curvature of the arc-shaped concave surface is R2-R5.

5. The two-stroke self-flanging forming die according to claim 1, characterized in that, An inclined guide surface is provided at the connection between the primary flange head and the secondary flange head.

6. The two-stroke self-flanging forming die according to claim 5, characterized in that, The tilt angle of the inclined guide surface is 20°-45°.

7. The two-stroke self-flanging forming die according to claim 1, characterized in that, The secondary flange head is a cylindrical structure with a tapered shape.

8. The two-stroke self-flanging forming die according to claim 6, characterized in that, The diameter difference between the top and bottom of the secondary flange head is 0.1-0.3mm.

9. A flanging device, characterized in that, Includes the two-stroke self-flanging forming die as described in any one of claims 1-8.

10. The flanging equipment according to claim 9, characterized in that, It also includes a worktable and a flanging control module; among which: The flange control module is fixed on the workbench; The two-stroke self-flanging forming die is installed in the flanging control module and can perform pipeline flanging forming under the control of the flanging control module.

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