A simple tool for pressing flat squares

Abstract

The invention provides a simple tooling for pressing flat squares, including a lower die base and an upper die base, wherein the lower die base is provided with a first arc groove in the horizontal direction, and a first through groove is vertically provided in the middle of the lower die base; the upper die base is matched with the lower die base, and is provided with a second arc groove in the horizontal direction, and a second through groove is vertically provided in the middle of the upper die base; a lower pressing block and an upper pressing block are also provided, wherein the lower pressing block is set in the first through groove for sliding up and down; and the upper pressing block is set in the second through groove for sliding. The invention has a simple structure, an ingenious design, and is very easy to operate. Through the combined structural design of the upper and lower die bases and the upper and lower pressing blocks, the pipe fittings can be efficiently flattened, dust is not easily generated, the product quality is good, and the qualified rate of finished products can be greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of machining devices, and in particular relates to a simple tool for pressing flat squares. Background Art

[0002] The traditional method of flattening pipe fittings is usually to flatten them directly by hand. Not only is the flattening position inaccurate, but the pipe fittings are prone to irregular deformation during flattening, which affects the subsequent punching process, tube shrinking process, welding process, etc., resulting in a high scrap rate and low efficiency. On the other hand, if the pipe fittings are irregularly deformed after flattening, they need to be manually reshaped and restored, which is time-consuming and labor-intensive, and increases economic costs. Although there is a method of flattening by die extrusion in the prior art, the positioning accuracy of the simple die is poor, and the die itself is prone to matching deviations, making it even more difficult to ensure the dimensional accuracy of the workpiece after flattening. For small-scale production, the cost of purchasing flattening machine equipment is too high. Therefore, it is urgent to design a processing device that can achieve fast and high-quality flattening molding. Summary of the invention

[0003] In view of this, the invention aims to overcome the defects in the prior art and proposes a simple tool for pressing flat squares.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A simple tool for pressing flat squares, comprising:

[0006] A lower die base is provided with a first arc-shaped groove in the horizontal direction, and a first through groove is vertically provided in the middle of the lower die base;

[0007] A lower pressing block is slidably disposed in the first through groove;

[0008] The upper die base is matched with the lower die base, and is provided with a second arc groove in the horizontal direction, and a second through groove is vertically provided in the middle of the upper die base;

[0009] An upper pressing block is slidably disposed in the second through groove;

[0010] A positioning structure is provided between the upper die seat and the lower die seat to ensure that the second arc groove corresponds to the first arc groove, and the second through groove corresponds to the first through groove;

[0011] After the upper die base and the lower die base are assembled, a workpiece accommodating cavity is formed between the arc grooves of the two.

[0012] Furthermore, the positioning structure includes a raised platform symmetrically arranged on the lower die seat, and a recessed platform is provided on the upper die seat corresponding to the raised platform of the lower die seat; the height of the raised platform is consistent with the depth of the recessed platform, and the length direction of the raised platform and the recessed platform is consistent with the axial direction of the accommodating cavity.

[0013] Furthermore, a guide column is provided on the raised platform, and a blind hole matching the guide column is provided on the recessed platform.

[0014] Furthermore, a guiding cone surface is provided at the opening of the blind hole.

[0015] Furthermore, a conical guiding portion is provided on the top of the guide column.

[0016] Furthermore, the upper surface of the upper die base and the lower surface of the lower die base are both horizontally arranged planes.

[0017] Furthermore, the height of the accommodating cavity is slightly smaller than the outer diameter of the workpiece to be processed.

[0018] Furthermore, both inner and outer side surfaces of the upper pressing block and the lower pressing block are horizontally arranged planes.

[0019] A method for flattening using the above tooling,

[0020] Put the die base flat on the workbench, put the pipe to be processed into the first arc groove of the lower die base, and then buckle the upper die base;

[0021] Putting an upper pressing block into the second through groove of the upper die seat, and pressing the upper pressing block to a predetermined position by a press machine;

[0022] Reset the press, and without removing the upper pressing block, turn over the tooling as a whole, so that the lower die seat is on top and the upper die seat is on the bottom, and place them flat on the workbench;

[0023] A lower pressing block is placed in the first through groove of the lower die seat, and the lower pressing block is pressed to a predetermined position by a press machine.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The invention has a simple structure, ingenious design and is very easy to operate. Through the combined structural design of the upper and lower die bases and the upper and lower pressing blocks, the pipe fittings can be flattened efficiently, dust is not easily generated, the product quality is good, and the qualified rate of finished products can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0027] Figure 1 A schematic diagram of the structure created by the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the present invention when it is in use;

[0029] Figure 3 for Figure 2 Exploded diagram of

[0030] Figure 4 The present invention provides a schematic structural diagram of the middle and lower die base;

[0031] Figure 5 A schematic diagram of the structure of the upper die base in the invention;

[0032] Figure 6 A schematic diagram of a lower die base when a positioning column is provided in an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of a positioning column in an embodiment of the present invention;

[0034] Figure 8 It is a schematic diagram of an upper die base when a blind hole is provided in an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1-lower die seat; 2-first arc groove; 3-first through groove; 4-lower pressure block; 5-upper die seat; 6-second arc groove; 7-second through groove; 8-upper pressure block; 9-convex platform; 10-concave platform; 11-guide column; 12-guide part; 13-accommodating cavity; 14-blind hole; 15-matching surface; 16-pipe fitting to be processed. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] A simple tool for pressing flat squares, such as Figures 1 to 8 As shown, including:

[0042] A lower die base 1 is provided with a first arc groove 2 in the horizontal direction, and a first through groove 3 is vertically provided in the middle of the lower die base;

[0043] A lower pressing block 4 is slidably disposed in the first through groove;

[0044] The upper die base 5 is matched with the lower die base, and is provided with a second arc groove 6 in the horizontal direction, and a second through groove 7 is vertically provided in the middle of the upper die base;

[0045] The upper pressing block 8 is slidably disposed in the second through groove;

[0046] A positioning structure is provided between the upper die seat and the lower die seat to ensure that the second arc groove corresponds to the first arc groove, and the second through groove corresponds to the first through groove;

[0047] After the upper die base and the lower die base are assembled, a workpiece accommodating cavity 13 is formed between the arc grooves of the two.

[0048] The positioning structure includes a raised platform 9 symmetrically arranged on the lower die seat, and a recessed platform 10 is arranged on the upper die seat corresponding to the raised platform of the lower die seat; the height of the raised platform is consistent with the depth of the recessed platform, and the length direction of the raised platform and the recessed platform is consistent with the axial direction of the accommodating cavity.

[0049] In order to improve the matching accuracy of the upper and lower die bases and facilitate assembly operations, in an optional embodiment, as Figure 6 and Figure 7 As shown, the raised platform is provided with a guide column 11, and the recessed platform is provided with a blind hole 14 matching the guide column. The depth of the blind hole is generally greater than the length of the guide column to prevent the upper and lower mold bases from being unable to be installed in place. Figure 8As shown, a guide cone surface (i.e., chamfer) is provided at the opening of the blind hole on the upper die seat. A conical guide portion 12 is provided at the top of the guide column. During the assembly and fastening process of the upper and lower die seats, the guide cone surface and the guide portion both play a good guiding role, which is conducive to the rapid insertion of the guide column into the blind hole, with high positioning and matching accuracy, fast combination speed, and high work efficiency.

[0050] The height of the accommodating cavity is slightly smaller than the outer diameter of the pipe 16 to be processed. The height of the accommodating cavity referred to here is actually the minimum inner diameter of the cavity formed by the arc grooves of the upper die seat and the lower die seat.

[0051] When processing and manufacturing the upper and lower die bases, in order to reduce the processing matching surface 15, reduce the processing difficulty and cost, the arc of the arc groove can be enlarged, as long as the minimum gap of the accommodating cavity is slightly smaller than the pipe to be processed after the upper and lower die bases are assembled. Usually, the distance at the minimum gap of the accommodating cavity is 0.1-0.5mm smaller than the diameter of the workpiece.

[0052] The upper surface of the upper die seat and the lower surface of the lower die seat are both horizontally arranged planes. The inner and outer surfaces of the upper pressing block and the lower pressing block are both horizontally arranged planes. This ensures that the deformation of the workpiece during pressing is controllable and the accuracy is easier to guarantee.

[0053] In an optional embodiment, the groove depths of the first arc groove and the second arc groove gradually increase toward the outside as they approach the corresponding through grooves (the closer to the first and second through grooves, the smaller the groove depth; the closer to the first and second through grooves, the closer the height of the accommodating groove is to the width of the flat to be formed), that is, the formed accommodating groove has a smaller inner diameter in the part close to the through groove (upper / lower pressure block), and the parts opening to both sides of the accommodating groove tend to gradually increase.

[0054] With the above structural design, before the flattening action, the upper and lower die seats are first used to pre-tighten the pipe fittings, so that a certain transition area is formed between the unflattened area and the flattened area of ​​the pipe fitting, and the transition area is designed in an asymptotic manner, which minimizes the generation of burrs on the workpiece during the flattening process, and the finished product quality is high, which greatly improves the finished product rate of the workpiece.

[0055] A method for flattening using the above tooling is provided below:

[0056] Put the die base flat on the workbench. At this time, do not install the lower pressing block in the lower die base first, put the pipe to be processed into the first arc groove of the lower die base, and then buckle the upper die base;

[0057] An upper pressing block is placed in the second through groove of the upper die seat, and a press is used to press the upper pressing block to a predetermined height position, which is determined by the stroke of the press and is easy to control;

[0058] Reset the press, and without removing the upper pressing block, turn over the tooling as a whole, so that the lower die seat is on top and the upper die seat is on the bottom, and place them flat on the workbench;

[0059] Put the lower pressing block in the first through groove of the lower die seat, and use the press to press the lower pressing block to a predetermined height position, the position is determined by the stroke of the press. Since the workpieces pressed flat by this device are mostly aluminum tubes or copper tubes made of aluminum or copper, which have good ductility, the above-mentioned flattening method can achieve equal distance flattening on both sides, and can also be flattened in an eccentric structure, which is very easy to control, reliable in structure, high in forming accuracy, and can adapt to the pressing operation of special structures (such as eccentric flat pressing).

[0060] The invention has a simple structure, ingenious design and is very easy to operate. Through the combined structural design of the upper and lower die bases and the upper and lower pressing blocks, the pipe fittings can be flattened efficiently, dust is not easily generated, the product quality is good, and the qualified rate of finished products can be greatly improved.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A simple tool for pressing flat squares, characterized in that: include: A lower die base is provided with a first arc-shaped groove in the horizontal direction, and a first through groove is vertically provided in the middle of the lower die base; A lower pressing block is slidably disposed in the first through groove; The upper die base is matched with the lower die base, and is provided with a second arc groove in the horizontal direction, and a second through groove is vertically provided in the middle of the upper die base; An upper pressing block is slidably disposed in the second through groove; A positioning structure is provided between the upper die seat and the lower die seat to ensure that the second arc groove corresponds to the first arc groove, and the second through groove corresponds to the first through groove; After the upper die base and the lower die base are assembled, a workpiece accommodating cavity is formed between the arc grooves of the two; The groove depths of the first arc groove and the second arc groove gradually increase from the position close to the corresponding through groove to the outside, and the inner diameter of the formed accommodating cavity near the through groove is smaller, and the openings on both sides of the accommodating cavity tend to gradually increase, and the distance at the minimum gap of the accommodating cavity is 0.1-0.5mm smaller than the diameter of the workpiece; The positioning structure includes a raised platform symmetrically arranged on the lower die seat, and a concave platform is arranged on the upper die seat corresponding to the raised platform of the lower die seat; the height of the raised platform is consistent with the depth of the concave platform, and the length direction of the raised platform and the concave platform is consistent with the axial direction of the accommodating cavity. The upper surface of the upper die seat and the lower surface of the lower die seat are both horizontally arranged planes; the inner and outer side surfaces of the upper pressing block and the lower pressing block are both horizontally arranged planes; A guide column is provided on the raised platform, and a blind hole matching the guide column is provided on the recessed platform, and the depth of the blind hole is greater than the length of the guide column; before the flattening action, the upper and lower die seats are used to pre-tighten the pipe fitting so that a certain transition area is formed between the unflattened area and the flattened area of ​​the pipe fitting to avoid burrs on the workpiece during the flattening process.

2. A simple tool for pressing flat squares according to claim 1, characterized in that: A guiding cone surface is provided at the opening of the blind hole.

3. A simple tool for pressing flat squares according to claim 1, characterized in that: A conical guiding portion is provided on the top of the guide column.

4. A method for flattening using the tooling according to claim 1, characterized in that: Put the die base flat on the workbench, put the pipe to be processed into the first arc groove of the lower die base, and then buckle the upper die base; Putting an upper pressing block into the second through groove of the upper die seat, and pressing the upper pressing block to a predetermined position by a press machine; Reset the press, and without removing the upper pressing block, turn over the tooling as a whole, so that the lower die seat is on top and the upper die seat is on the bottom, and place them flat on the workbench; A lower pressing block is placed in the first through groove of the lower die seat, and the lower pressing block is pressed to a predetermined position by a press machine; The depths of the first arc groove and the second arc groove gradually increase toward the outside near the corresponding through grooves. The formed accommodating cavity has a smaller inner diameter near the through grooves, and the portions opening to both sides of the accommodating cavity tend to gradually increase.

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