Thick red copper stamping traceless bending die

Abstract

The utility model discloses a thick red copper stamping traceless bending die, and relates to the technical field of red copper bending machining. The thick red copper stamping traceless bending die comprises an upper die mechanism and a lower die mechanism, and the upper die mechanism comprises an upper die base used for installation and a bending female die used for bending thick red copper. The lower die mechanism comprises an outer guide column, an outer limiting column, an outer positioning assembly, a movable outer positioning assembly, a lower die frame and a nitrogen pressure supporting unit, wherein the outer guide column and the outer limiting column are used for guiding, the outer positioning assembly and the movable outer positioning assembly are used for limiting materials, the lower die frame is used for installation, and the nitrogen pressure supporting unit is used for supporting. The nitrogen pressure supporting unit is composed of a bending male die, a stripping core, a dowel bar and a nitrogen spring. According to the utility model, by improving the die structure, the appearance defect and the side wall deformation of a product caused by the traditional die structure are avoided, the die structure is also improved from the original form to a light and convenient form, the production efficiency and the product quality are improved, the part scrap probability caused by the original structural process is reduced, and the consumption of raw materials is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of copper bending processing, in particular to a thick copper stamping and traceless bending die. Background Art

[0002] Copper is industrial pure copper. Because it has a rose red color and turns purple after an oxide film is formed on the surface, it is generally called copper, also known as red copper. It is copper containing a certain amount of oxygen, so it is also called oxygen-containing copper, and sometimes it can also be regarded as a copper alloy. In order to meet the demand, the copper material will be squeezed into a curved shape, but in the existing bending and forming device, the copper material will stick to the mold wall after bending and forming, which is inconvenient to take out, thereby reducing the speed of bending and forming the copper material. For example, a laminated copper material bending and forming die disclosed in Chinese Patent Publication No. CN217451604U, the forming die can drive the threaded rod to rotate through the matching arrangement of a reduction motor, a worm and a worm gear, and the threaded rod can drive the workbench to move downward through the matching arrangement of a threaded sleeve, a horizontal plate and a vertical rod, at which time the slide plate will move upward relative to the workbench, and the slide plate will drive the push block to move upward relative to the workbench through a push rod, and push the copper material out of the forming groove, thereby facilitating the removal of the copper material, thereby improving the speed of bending and forming the copper material.

[0003] However, the copper sheet is relatively thick, and its unit forming cross-sectional area is large, and the forming resistance is large, but the material itself is very thick in plasticity. The above-mentioned device uses the traditional forming method of directly punching and bending the thick copper sheet in the forming groove through the extrusion block, which easily causes the thick copper sheet to appear concave in appearance and deform the side wall. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a thick copper stamping seamless bending die, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a thick copper stamping seamless bending die, comprising an upper die mechanism and a lower die mechanism, wherein the upper die mechanism comprises an upper die seat for installation and a bending die for bending thick copper;

[0006] The lower mold mechanism includes an outer guide column and an outer limit column for guiding, an outer positioning component and a movable outer positioning for limiting the material, a lower mold frame for installation, and a nitrogen pressure support unit for support;

[0007] The nitrogen pressure support unit consists of a bending punch, a stripping core, a force transmission rod and a nitrogen spring, and the bending punch, the stripping core, the force transmission rod and the nitrogen spring are all installed on the lower mold frame.

[0008] In this embodiment, the nitrogen spring is used as a pressure source, so that under the support of nitrogen pressure, the surface of the stripping core contacts the bottom plane of the thick copper material to be bent, forming a unique punch structure, and the nitrogen spring can accurately measure and calculate the elastic force it provides during the bending process, which is convenient for the operator to adjust. At the same time, a sufficiently large and accurate initial force can be obtained without pre-tightening, thereby solving the problem of the simultaneous existence of elastic deformation and plastic deformation force when bending thick copper material, and controlling the horizontal and vertical rebound of the thick copper material.

[0009] A further improvement of the technical solution of the utility model is that: a guide column groove matching the outer guide column is provided on the lower mold frame, the outer guide column is installed at the bottom of the upper mold base and is limitedly connected to the lower mold frame through the guide column groove, the outer limit column is installed at the bottom of the upper mold base and is located between the bending die and the outer guide column, and the outer limit column is limitedly connected to the lower mold frame through a limit groove opened in the lower mold frame.

[0010] A further improvement of the technical solution of the utility model is that the external positioning component and the movable external positioning are respectively located on both sides of the lower mold frame, and the external positioning component is installed on the side end of the lower mold frame, and the movable external positioning is installed on the top of the lower mold frame close to one side of the bending die, and the lower mold frame is connected to the initial bending blank to be bent through the external positioning component and the movable external positioning limiter.

[0011] A further improvement of the technical solution of the utility model is that: the bending punches are provided with two groups and are symmetrically distributed at the bending grooves for bending in the lower mold frame, the stripping core is located between the two bending punches, the bottom of the stripping core is connected to a force transmission rod, the other end of the force transmission rod is connected to a nitrogen spring, and the upper mold mechanism descends and approaches the lower mold mechanism to bend the initial blank to form a bent product.

[0012] In this embodiment, the inner side of the material is subjected to compressive strain and the outer side is subjected to tensile strain during bending. By improving the contour shape of the bending punch mouth, as shown in the attached Figure 1 As shown, during the forming process, the material and the bending punch are always in surface contact, and the original standard contour is improved to the current gradient contour, which greatly reduces the original mold stroke and also provides a theoretical calculation basis for the geometric relationship to reduce the stroke of the pressure source parts.

[0013] A further improvement of the technical solution of the utility model is that the nitrogen spring is fixedly installed on a lower support plate, and an upper support plate for placing the lower mold frame is arranged above the lower support plate, and lower pads for supporting the device are arranged in an array between the lower support plate and the upper support plate.

[0014] A further improvement of the technical solution of the utility model is that the bending part at the bottom of the bending die is located just above the middle of the bending punch, and the upper die mechanism is connected to a slider mechanism or a hydraulic mechanism for lifting.

[0015] Beneficial Effects

[0016] The utility model provides a thick copper stamping seamless bending die. Compared with the prior art, it has the following beneficial effects:

[0017] 1. The thick copper stamping seamless bending die avoids product appearance defects and side wall deformation caused by the traditional die structure by improving the die structure. The die structure is also improved from the original form to a light and convenient form, which improves production efficiency and product quality, reduces the probability of parts scrapping due to the original structural process, and saves the consumption of raw materials.

[0018] 2. The thick copper stamping seamless bending die improves the contour shape of the bending punch mouth so that the material and the bending punch are always in surface contact during the forming process. The original standard contour is improved to the current gradient contour, which greatly reduces the original die stroke and provides a theoretical calculation basis for the geometric relationship to reduce the stroke of the pressure source parts, greatly improving the original die. The new forming die has a light structure, is convenient for taking and placing blanks, and has a beautiful appearance after production. It successfully solves the quality defects such as appearance depression and side wall deformation caused by the traditional die structure and can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural sectional view of the mold of the utility model;

[0020] Figure 2 It is a schematic diagram of the bending forming of thick copper in the utility model.

[0021] In the figure: 10, upper die mechanism; 20, lower die mechanism; 101, upper die seat; 102, bending die; 201, outer guide column; 202, outer limit column; 203, outer positioning assembly; 204, movable outer positioning; 205, lower die frame; 206, bending punch; 207, stripping core; 208, force transmission rod; 209, lower pad; 210, nitrogen spring; 211, lower support plate; 30, thick copper; 301, finished bending product; 302, initial bending blank. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides three technical solutions:

[0024] Figure 1The first embodiment is shown: a thick copper stamping seamless bending die, comprising an upper die mechanism 10 and a lower die mechanism 20, wherein the upper die mechanism 10 comprises an upper die seat 101 for installation and a bending die 102 for bending the thick copper 30;

[0025] The lower mold mechanism 20 includes an outer guide column 201 and an outer limit column 202 for guiding, an outer positioning component 203 and a movable outer positioning 204 for limiting the material, a lower mold frame 205 for installation, and a nitrogen pressure support unit for support;

[0026] The nitrogen pressure support unit is composed of a bending punch 206 , a stripping core 207 , a force transmission rod 208 and a nitrogen spring 210 . The bending punch 206 , the stripping core 207 , the force transmission rod 208 and the nitrogen spring 210 are all installed on the lower mold frame 205 .

[0027] In this embodiment, the nitrogen spring 210 is used as a pressure source, so that under the support of nitrogen pressure, the surface of the stripping core 207 contacts the bottom plane of the thick copper material to be bent, forming a unique punch structure, and the nitrogen spring 210 can accurately measure and calculate the elastic force it provides during the bending process, which is convenient for the operator to adjust. At the same time, a sufficiently large and accurate initial force can be obtained without pre-tightening, thereby solving the problem of the simultaneous existence of elastic deformation and plastic deformation force when bending thick copper material, and controlling the horizontal and vertical rebound of the thick copper material.

[0028] The lower mold frame 205 is provided with a guide column groove matching the outer guide column 201. The outer guide column 201 is installed at the bottom of the upper mold base 101 and is limitedly connected to the lower mold frame 205 through the guide column groove. The outer limit column 202 is installed at the bottom of the upper mold base 101 and is located between the bending die 102 and the outer guide column 201. The outer limit column 202 is limitedly connected to the lower mold frame 205 through a limit groove opened in the lower mold frame 205.

[0029] Figure 1 A second embodiment is shown, and its main difference from the first embodiment is that the external positioning component 203 and the movable external positioning 204 are respectively located on both sides of the lower mold frame 205, and the external positioning component 203 is installed on the side end of the lower mold frame 205, and the movable external positioning 204 is installed on the top of the lower mold frame 205 close to the side of the bending die 102. The lower mold frame 205 is limitedly connected to the initial bending blank 302 to be bent through the external positioning component 203 and the movable external positioning 204.

[0030] There are two groups of bending punches 206 symmetrically distributed in the bending grooves for bending in the lower mold frame 205. The stripping core 207 is located between the two bending punches 206. The bottom of the stripping core 207 is connected to the force transmission rod 208, and the other end of the force transmission rod 208 is connected to the nitrogen spring 210. After the upper mold mechanism 10 descends and approaches the lower mold mechanism 20, the initial blank 302 is bent to form a bent product 301.

[0031] In this embodiment, the inner side of the material is subjected to compressive strain and the outer side is subjected to tensile strain during bending. By improving the contour shape of the bending punch mouth, as shown in the attached Figure 1 As shown, during the forming process, the material and the bending punch are always in surface contact, and the original standard contour is improved to the current gradient contour, which greatly reduces the original mold stroke and also provides a theoretical calculation basis for the geometric relationship to reduce the stroke of the pressure source parts.

[0032] Figure 1 A third embodiment is shown, which mainly differs from the first embodiment in that a nitrogen spring 210 is fixedly mounted on a lower support plate 211, and an upper support plate for placing a lower mold frame 205 is provided above the lower support plate 211, and lower pads 209 for supporting the device are arranged in an array between the lower support plate 211 and the upper support plate.

[0033] The bottom bending portion of the bending die 102 is located directly above the middle of the bending punch 206, and the upper die mechanism 2 is connected to a slider mechanism or a hydraulic mechanism for lifting.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] When in use, in the first stage, the initial bending blank 302 is placed on the surface of the lower mold frame 205, and the external positioning component 203 and the movable external positioning 204 position the initial bending blank 302 to ensure that the relative position of the initial blank is correct. The stripping core 207, the force transmission rod 208, and the nitrogen spring 210 cooperate with each other, and under the support of nitrogen pressure, the surface of the stripping core 207 contacts the bottom plane of the initial bending blank 302;

[0036] In the second stage, the upper die mechanism 10 is connected to the upper slider mechanism or hydraulic mechanism of the press, and the upper die seat 101 is driven downward by the press, and the bending die 102 is driven downward, and the bending die 102 contacts the initial bending blank 302. The upper die mechanism continues to move downward to drive the bending die 102 downward, and pressure is applied to the upper surface of the initial bending blank 302. The surface of the bending punch 206 interacts with the initial bending blank 302 and the bending die 102 to complete the bending, and the initial bending blank 302 is formed into a bent finished product 301;

[0037] In the third stage, the upper die mechanism 10 moves upward, and the upper die base 101, the bending die 102, and the bent product 301 move upward together. The force transmission rod 208 of the lower die mechanism drives the stripping core 207 upward under the force of the nitrogen spring 210 to complete the stripping. Finally, the finished product remains on the bending die 102 and is manually extracted from the side. The entire manufacturing process is completed.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thick copper stamping seamless bending die, comprising an upper die mechanism and a lower die mechanism, characterized in that: The upper die mechanism comprises an upper die seat for installation and a bending die for bending thick copper; The lower mold mechanism includes an outer guide column and an outer limit column for guiding, an outer positioning component and a movable outer positioning for limiting the material, a lower mold frame for installation, and a nitrogen pressure support unit for support; The nitrogen pressure support unit consists of a bending punch, a stripping core, a force transmission rod and a nitrogen spring, and the bending punch, the stripping core, the force transmission rod and the nitrogen spring are all installed on the lower mold frame.

2. A thick copper stamping seamless bending die according to claim 1, characterized in that: The lower mold frame is provided with a guide column groove matching the outer guide column. The outer guide column is installed at the bottom of the upper mold base and is limitedly connected to the lower mold frame through the guide column groove. The outer limit column is installed at the bottom of the upper mold base and is located between the bending die and the outer guide column. The outer limit column is limitedly connected to the lower mold frame through a limit groove opened in the lower mold frame.

3. The thick copper stamping seamless bending die according to claim 1, characterized in that: The external positioning component and the movable external positioning are respectively located on both sides of the lower mold frame, and the external positioning component is installed on the side end of the lower mold frame, and the movable external positioning is installed on the top of the lower mold frame close to one side of the bending die. The lower mold frame is connected to the initial bending blank to be bent through the external positioning component and the movable external positioning limiter.

4. A thick copper stamping seamless bending die according to claim 3, characterized in that: The bending punches are provided with two groups and are symmetrically distributed at the bending grooves for bending in the lower mold frame. The stripping core is located between the two bending punches. The bottom of the stripping core is connected to a force transmission rod, and the other end of the force transmission rod is connected to a nitrogen spring. After the upper mold mechanism descends and approaches the lower mold mechanism, the initial blank is bent to form a bent product.

5. The thick copper stamping seamless bending die according to claim 4, characterized in that: The nitrogen spring is fixedly mounted on a lower support plate, and an upper support plate for placing a lower mold frame is arranged above the lower support plate, and lower pads for supporting the device are arranged in an array between the lower support plate and the upper support plate.

6. The thick copper stamping seamless bending die according to claim 1, characterized in that: The bending part at the bottom of the bending die is located just above the middle of the bending punch, and the upper die mechanism is connected to a slider mechanism or a hydraulic mechanism for lifting.

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