Mobile phone middle frame rolling and shaping die

Abstract

The utility model discloses a mobile phone middle frame rolling and shaping die which comprises a stamping head, an upper die and a lower die, the upper die comprises an upper die body and an upper rolling block, a mounting groove is formed in the middle of the upper die body, the upper rolling block is detachably connected in the mounting groove, the lower die comprises a lower die body, a shaping frame and a lower cushion block, and a containing groove is formed in the middle of the lower die body. The shaping frame is placed in the containing groove, the lower cushion block is placed in the shaping frame, the punching head and the upper die are provided with a plurality of installation screw holes matched in position, and the bottom face of the upper rolling block and the top face of the lower cushion block are provided with #-shaped grid protrusions. A well-shaped grid stamping trace is left on the middle frame of the mobile phone, so that residual internal stress in the middle frame of the mobile phone is stamped to an area outside a core area of the well-shaped grid stamping trace through stamping, and the problem that the core area in the middle of the middle frame of the mobile phone deforms in the double-sided grinding process is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to stamping forming technical field, especially in a kind of mobile phone middle frame rolling shaping die. BACKGROUND

[0002] Mobile phone middle frame is one of important components of mobile phone, it needs to pass through composite, saw cutting, friction stir welding, shaping multiple steps in making, and the process of shaping is by die pressing stamping to carry out double-sided plastic shaping, while releasing the internal stress generated in product friction stir welding;

[0003] But there are the following problems in shaping by die pressing stamping, although mobile phone middle frame will be annealed after friction stir welding to release its internal stress, but there is still the problem that internal stress of mobile phone middle frame is not completely released after annealing, mobile phone middle frame in this state carries out subsequent processing technology, such as double-end face grinding (DDG), and then mobile phone middle frame local deformation occurs;

[0004] Therefore, a kind of mobile phone middle frame rolling shaping die to solve the above problems is urgently needed. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of mobile phone middle frame rolling shaping die to solve the above problems.

[0006] To achieve the above object, the utility model adopts the following technical scheme: a kind of mobile phone middle frame rolling shaping die, comprising:

[0007] Punch head, upper die and lower die, upper die includes upper die body and upper rolling block, upper die body middle is equipped with installation groove, upper rolling block is detachably connected in installation groove, lower die includes lower die body, shaping frame and lower cushion block, lower die body middle position is equipped with placement slot, shaping frame is placed in placement slot;

[0008] Lower cushion block is placed in shaping frame, punch head and upper die are equipped with multiple position matching installation screw hole, lower die position and upper die position correspond, upper rolling block bottom surface and lower cushion block top surface are equipped with crosshatch convex.

[0009] Preferably, at least two inner grooves are provided on the side wall of the installation groove, and the height of the at least two inner grooves is less than the height of the installation groove.

[0010] Preferably, the outer side wall of the upper rolling block is provided with a mounting protrusion matched with the inner groove.

[0011] Preferably, a limiting assembly is provided on the upper die body, the limiting assembly comprising two sets of guide rods and two sets of limiting blocks, one end of the two sets of guide rods is fixed on the bottom surface of the upper die body at symmetrical positions, and the two sets of limiting blocks are threadedly connected to the guide rods.

[0012] Preferably, the lower mold body top surface is provided with a limiting hole corresponding to the position of the guide rod, and the limiting hole has a diameter larger than that of the guide rod and smaller than the radius of the limiting block.

[0013] Preferably, the lower mold bottom is provided with a push chamber, and the push chamber is provided with a push rod in contact with the lower cushion block.

[0014] Preferably, the lower mold body is provided with two groups of locking assemblies, each locking assembly comprising a locking rod and a locking handle, one end of each locking rod being fixedly connected to the corresponding locking handle, the other end of each locking rod penetrating through the two position-symmetric side walls of the lower mold body and being in contact with the shaping frame, and the locking rod being threadedly connected to the lower mold body.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] In order to avoid the deformation of the mobile phone middle frame in the double-sided grinding, the mobile phone middle frame plate body is stamped by using a stamping die, so as to leave a grid stamping trace on the mobile phone middle frame, and then the residual internal stress in the mobile phone middle frame is stamped to the area outside the core area of the grid stamping trace by stamping, thereby avoiding the deformation of the core area of the mobile phone middle frame in the double-sided grinding process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of a mobile phone middle frame rolling shaping die;

[0018] Figure 2 It is a cross-sectional structure schematic view of a mobile phone middle frame rolling shaping die;

[0019] Figure 3 It is a structure schematic view of an upper rolling block in the embodiment of the utility model;

[0020] Figure 4 It is a cross-sectional structure schematic view of a locking assembly in the second embodiment of the utility model.

[0021] In the drawing: 1, stamping head; 10, mounting screw hole; 2, upper die; 20, upper die body; 200, mounting groove; 2000, inner groove; 21, upper rolling block; 210, grid-shaped convex; 211, mounting convex; 3, lower die; 30, lower die body; 300, placing groove; 31, shaping frame; 32, lower cushion block; 4, limiting assembly; 40, guide rod; 41, limiting block; 42, limiting hole; 5, locking assembly; 50, locking rod; 51, locking handle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] Please refer to the attached Figures 1-3 A mobile phone middle frame rolling shaping die, comprising:

[0024] The stamping head 1, the upper die 2 and the lower die 3, the upper die 2 comprises an upper die body 20 and an upper rolling block 21, the upper die body 20 is provided with a mounting groove 200 in the middle, the upper rolling block 21 is detachably connected in the mounting groove 200, the lower die 3 comprises a lower die body 30, a shaping frame 31 and a lower pad 32, the lower die body 30 is provided with a placing groove 300 at the middle position, the shaping frame 31 is placed in the placing groove 300,

[0025] The lower pad 32 is placed in the shaping frame 31, the stamping head 1 and the upper die 2 are provided with a plurality of position-matched mounting screw holes 10, the position of the lower die 3 corresponds to the position of the upper die 2, the bottom surface of the upper rolling block 21 and the top surface of the lower pad 32 are provided with a cross-shaped grid protrusion 210;

[0026] The upper die 2 and the lower die 3 are adopted in a split type to replace the traditional integrated die, when the die is replaced, only the upper rolling block 21, the shaping frame 31 and the lower pad 32 need to be replaced, in order to further simplify the replacement process of the die, the upper rolling block 21 is located in the mounting groove 200, after the screw rod in the mounting screw hole 10 is removed, the stamping head 1 and the upper die 2 are separated, and then the upper rolling block 21 is replaced, and the replacement of the lower die 3 is simpler, only the shaping frame 31 and the lower pad 32 in the placing groove 300 need to be taken out, in the stamping process, the rolling of the double sides of the mobile phone middle frame plate body is completed through the upper rolling block 21 and the lower pad 32, in order to solve the deformation of the mobile phone middle frame plate body caused by the internal stress in the subsequent double-sided grinding, the cross-shaped grid protrusion 210 is arranged on the upper rolling block 21 and the lower pad 32, which leaves the stamping marks of the cross-shaped grid pattern on the mobile phone middle frame plate body, and the internal stress of the mobile phone middle frame is concentrated on the edge through the stamping method, so that the central core area of the mobile phone middle frame plate body will not be deformed in the double-sided grinding process.

[0027] Specifically, at least two inner grooves 2000 are arranged on the side wall of the mounting groove 200, and the height of the at least two inner grooves 2000 is less than the height of the mounting groove 200.

[0028] Specific, the upper rolling block 21 outer wall is equipped with the installation lug 211 matched with the inner recess 2000; considering the connection mode between the upper rolling block 21 and the upper die body 20 is numerous, for example, the bolt connection mode is used, in order to simplify the dismounting mode of the upper rolling block 21, the inner recess 2000 is arranged on the installation groove 200 in the utility model, and the installation lug 211 matched with the position of the inner recess 2000 is arranged on the upper rolling block 21, the installation of the upper rolling block 21 is quickly completed through simple clamping, finally the upper die 2 and the stamping head 1 are connected, the vertical movement of the upper rolling block 21 is limited by the stamping head 1, and the fixing of the upper rolling block 21 is completed.

[0029] The upper die body 20 is equipped with a limiting assembly 4, the limiting assembly 4 includes two groups of guide rods 40 and two groups of limiting blocks 41, one end of the two groups of guide rods 40 is fixed on the bottom surface of the upper die body 20 at symmetrical positions respectively, and the two groups of limiting blocks 41 are threadedly connected on the guide rods 40.

[0030] Specific, the upper die body 20 top surface is equipped with the limiting hole 42 corresponding to the position of the guide rod 40, and the limiting hole 42 hole diameter is greater than the guide rod 40 hole diameter and less than the limiting block 41 radius;

[0031] After the upper rolling block 21 is replaced, the position of the upper die 2 and the lower die 3 needs to be calibrated, after the machine is started, whether the guide rod can normally probe into the limiting hole 42 is observed, if yes, it means that the position of the upper die 2 and the lower die 3 is correct, otherwise the position of the upper die 2 or the lower die 3 needs to be adjusted, at the same time, considering that although the upper rolling block 21 and the lower pad block 32 can complete the stamping of the mobile phone middle frame plate body and solve the deformation problem of the mobile phone middle frame plate body in the subsequent polishing process through the stamping mode, the stamping distance may not be adjusted well, which may cause the mobile phone middle frame plate body to be damaged, in order to ensure that excessive stamping does not occur, the limiting block 41 is further arranged on the basis of the guide rod 40, the downward position of the upper rolling block 21 is limited in the stamping process of the upper rolling block 21, and damage marks of the mobile phone middle frame plate body caused by stamping are avoided.

[0032] Specific, the lower die 3 bottom is equipped with the push chamber 33, the push rod 330 is arranged in the push chamber 33, and the push rod 330 is in contact with the lower pad block 32; in order to facilitate the taking out and placing of the mobile phone middle frame after stamping, the push chamber 33 and the push rod 330 are arranged at the bottom of the lower die 3, and the push rod 330 is used to assist the installation and taking out of the processed parts.

[0033] Embodiment two

[0034] Please refer to Figure 4

[0035] In view of the problem that there may be a gap between the shaping frame 31 and the placing groove 300, or the shaping frame 31 is smaller than the placing groove 300, in this case, the lower mold 3 usually needs to be replaced with a suitable one, but in order to reduce the cost and increase the utilization rate of the lower mold 3, two groups of positionally symmetrical locking assemblies 5 are arranged on the side wall of the lower mold body 30, through the arrangement of the locking rod 50 and the locking handle 51, the shaping frame 31 placed in the placing groove 300 is positionally locked by external force, and the problem of mismatching between the shaping frame 31 and the placing groove 300 is solved, and it needs to be noted that the position of the locking assembly 5 needs to be staggered with the position of the limiting hole 42, so as to avoid affecting the normal application of the limiting assembly 4.

[0036] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A mobile phone middle frame rolling shaping die, characterized in that, include: The stamping head (1), upper die (2) and lower die (3) are provided. The upper die (2) includes an upper die body (20) and an upper rolling block (21). The upper die body (20) is provided with an installation groove (200) in the middle. The upper rolling block (21) is detachably connected to the installation groove (200). The lower die (3) includes a lower die body (30), a shaping frame (31) and a lower pad block (32). The lower die body (30) is provided with a placement groove (300) in the middle. The shaping frame (31) is placed in the placement groove (300). The lower pad (32) is placed inside the shaping frame (31). The stamping head (1) and the upper mold (2) are provided with multiple mounting screw holes (10) that match the position. The position of the lower mold (3) corresponds to the position of the upper mold (2). The bottom surface of the upper rolling block (21) and the top surface of the lower pad (32) are provided with grid protrusions (210).

2. The rolling and shaping die for a mobile phone middle frame according to claim 1, characterized in that: The mounting groove (200) has at least two inner grooves (2000) on its side wall, and the height of the at least two inner grooves (2000) is less than the height of the mounting groove (200).

3. The mobile phone mid-frame rolling and shaping die according to claim 2, characterized in that: The outer wall of the upper rolling block (21) is provided with a mounting protrusion (211) that matches the inner groove (2000).

4. The mobile phone mid-frame rolling and shaping die according to claim 3, characterized in that: The upper mold body (20) is provided with a limiting component (4), which includes two sets of guide rods (40) and two sets of limiting blocks (41). One end of each of the two sets of guide rods (40) is fixed to a symmetrical position on the bottom surface of the upper mold body (20), and the two sets of limiting blocks (41) are threadedly connected to the guide rods (40).

5. The mobile phone mid-frame rolling and shaping die according to claim 4, characterized in that: The lower mold body (30) has a limiting hole (42) on its top surface that corresponds to the position of the guide rod (40), and the diameter of the limiting hole (42) is larger than the diameter of the guide rod (40) and smaller than the radius of the limiting block (41).

6. The mobile phone mid-frame rolling and shaping die according to claim 1, characterized in that: The bottom of the lower mold (3) is provided with a push cavity (33), and a push rod (330) is provided in the push cavity (33). The push rod (330) is in contact with the lower pad block (32).

7. The mobile phone mid-frame rolling and shaping die according to claim 1, characterized in that: The lower mold body (30) is provided with two sets of locking components (5). The locking components (5) include locking rods (50) and locking handles (51). One end of each of the two sets of locking rods (50) is fixedly connected to the two locking handles (51), and the other end passes through two symmetrical side walls of the lower mold body (30) and contacts the shaping frame (31). The locking rods (50) are threadedly connected to the lower mold body (30).

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