A flatness shaping method and a flatness shaping jig

Abstract

This invention proposes a planarity shaping method. A first reference point and a first measurement point are selected along a first shaping direction of the material, with a first shaping line connecting the first reference point and the first measurement point. A second reference point and a second measurement point are selected along the first shaping direction of the material, with a second shaping line connecting the second reference point and the second measurement point, and the second shaping line is parallel to the first shaping line. Along a second shaping direction of the material, a first reference line connects the first reference point and the first measurement point connects the second measurement point, forming a first correction line. Using the first reference line as a reference, the first deformation height of the first measurement point along a third shaping direction of the material is measured, and the second deformation height of the second measurement point along the third shaping direction of the material is measured. This method avoids the irregular deformation caused by inconsistent internal force deformation in the internal area of ​​the mobile phone mid-plate during the shaping process, as is common in traditional planarity shaping methods for mobile phone mid-plates.

Description

Technical Field

[0001] This invention relates to the field of mobile phone mid-plate shaping equipment, specifically to a flatness shaping method and a flatness shaping fixture. Background Technology

[0002] In the structure of a mobile phone, the LCD screen is usually mounted on the middle board, which requires a high degree of flatness. The tolerance is generally within +0.05mm to -0.15mm to ensure the flatness of the LCD screen after installation. The middle board is usually processed by stamping dies. Since the deformation trend of the same batch of middle boards is consistent during the batch stamping process, the flatness of the same batch of middle boards can be shaped by a flatness shaping fixture.

[0003] In existing technologies, four endpoints are typically set as positioning references on the mid-plate of the phone, and the midpoints of each side of the mid-plate are corrected according to the deformation height. However, because the four endpoints are positioned at the same time, the structure of the middle part may experience inconsistent internal force deformation during the shaping process. This may cause irregular changes in the flatness shaping process of the mid-plate, resulting in frequent checks and adjustments to the effect of each mid-plate during the shaping process, and causing the production yield to be less than 85%. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a planarity shaping method and a planarity shaping fixture, which solves the problem that existing methods for planarity shaping of mobile phone midplates cause inconsistent internal force deformation and irregular deformation in the internal areas of the midplate during the shaping process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A planarity shaping method includes a material to be shaped, the material having a first shaping direction, a second shaping direction, and a third shaping direction that are perpendicular to each other; selecting a first reference point and a first measuring point along the first shaping direction of the material, with a first shaping line connecting the first reference point and the first measuring point; selecting a second reference point and a second measuring point along the first shaping direction of the material, with a second shaping line connecting the second reference point and the second measuring point, the second shaping line being parallel to the first shaping line; along the second shaping direction of the material, a first reference line connecting the first reference point and the second reference point, and a first correction line connecting the first measuring point and the second measuring point; using the first reference line as a reference, measuring a first deformation height of the first measuring point along the third shaping direction of the material, and measuring a second deformation height of the second measuring point along the third shaping direction of the material; the correction height of the first measuring point is -0.5 * the first deformation height, and the correction height of the second measuring point is -0.5 * the second deformation height.

[0007] Preferably, the midpoint of the first shaping line is selected as the first correction point. After shaping the material, the height of the first correction point is measured to be -0.25 * the first deformation height, then the shaping is qualified.

[0008] Preferably, the midpoint of the second shaping line is selected as the second correction point. After shaping the material, the height of the second correction point is measured to be -0.25 * the second deformation height, then the shaping is qualified.

[0009] Preferably, the midpoint of the first reference line is selected as the third reference point, the midpoint of the first correction line is selected as the third correction point, and along the first shaping direction of the material, the third reference point and the third correction point form a third shaping line, and the midpoint of the third shaping line is selected as the fourth correction point; the line connecting the first reference point, the second reference point, and the third reference point is a first curve, the line connecting the second measurement point, the second measurement point, and the third correction point is a second curve, and the line connecting the first correction point, the second correction point, and the fourth correction point is a third curve;

[0010] The first curve, the second curve, and the third curve have the same radian.

[0011] The present invention also proposes a flatness shaping fixture using the above-mentioned flatness shaping method, comprising a lower mold and an upper mold, wherein the lower mold is provided with a shaping and positioning platform, and the upper mold is provided with a pressure surface that cooperates with the shaping and positioning platform; the shaping and positioning platform is provided with a first reference point, a first measuring point, a second reference point, and a second measuring point, wherein the correction height of the first measuring point is -0.5 * the first deformation height, and the correction height of the second measuring point is -0.5 * the second deformation height.

[0012] Preferably, the lower mold is provided with positioning blocks located at four corners, and the upper mold is provided with positioning notches that cooperate with the positioning blocks.

[0013] Preferably, the lower mold has a positioning hole located between the two positioning blocks, and the upper mold has a positioning pin for inserting into the positioning hole.

[0014] Preferably, both the upper mold and the lower mold have heating or cooling modules.

[0015] Preferably, the shaping and positioning platform is provided with a recessed structure for positioning the middle plate of the mobile phone.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] During the shaping process, after locating the four endpoints of the phone's midplate, a first shaping line is formed along the first shaping direction. After forming the second shaping line, the deformation height of the first and second measurement points is measured. Then, a correction is made in the opposite direction according to 0.5 times the deformation height. This allows the phone's midplate to directly shape the deformation height along the first shaping direction with a reference edge as the zero point. This enables the two parallel edges to form a synchronous shaping process, allowing the deformation points in the internal area of ​​the phone's midplate to be adjusted synchronously according to the shaping direction. This avoids the need to measure and shape each deformation point in the internal area, which would result in different change patterns.

[0018] By applying a shaping force in the same direction to the edges of the mobile phone mid-plate in an overall shaping manner, it is possible to adjust the shaping fixture according to the same shaping method for mobile phone mid-plates with the same deformation pattern, which facilitates batch and regular shaping of mobile phone mid-frames with the same deformation direction.

[0019] It increases the yield rate to 98% and ensures that the gap in the concave part of the mobile phone's middle plate is within 0.05mm-0.1mm, and the maximum gap in the upward arch is within 0.1mm, thereby improving the yield rate of the shaping fixture. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the point layout according to an embodiment of the present invention;

[0021] Figure 2 This is a top-view axial side view of the shaping fixture in an embodiment of the present invention;

[0022] Figure 3 This is a bottom-view axial side view of the shaping fixture in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the lower mold of the shaping fixture in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the upper mold of the shaping fixture in an embodiment of the present invention;

[0025] In the picture,

[0026] First reference point A, first measuring point C, second reference point G, second measuring point I, first calibration point B, second calibration point H, third reference point D, third calibration point F, fourth calibration point E, lower mold 1, upper mold 2, shaping and positioning platform 3, pressure plane 4, positioning block 5, positioning notch 6, positioning hole 7, positioning pin 8. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0028] like Figure 1 As shown, an embodiment of the present invention proposes a planarity shaping method, including a material to be shaped, the material being a mobile phone mid-plate, with an overall rectangular structure. The material has three mutually perpendicular shaping directions: a first shaping direction, a second shaping direction, and a third shaping direction. The first shaping direction extends along the long side of the mobile phone mid-plate, the second shaping direction extends along the short side of the mobile phone mid-plate, and the third shaping direction extends along the thickness direction of the mobile phone mid-plate. The actual shaping process involves shaping the deformation of the mobile phone mid-plate along the third shaping direction. The relevant location points mentioned below refer to points that can be directly positioned in a fixture after the material has been shaped; that is, each point is located on the fixture.

[0029] Specifically, a first reference point A and a first measurement point C are selected along the first shaping direction of the material, and a first shaping line is formed between the first reference point A and the first measurement point C; and a second reference point G and a second measurement point I are selected along the first shaping direction of the material, and a second shaping line is formed between the second reference point G and the second measurement point I, and the second shaping line is parallel to the first shaping line; the first shaping line and the second shaping line are the long side of the mobile phone midplate. Simultaneously, along the second shaping direction of the material, the first reference point A and the second reference point G form a first reference line, and the first measurement point C and the second measurement point I form a first correction line. The first reference line and the first correction line constitute the short side of the phone's mid-plate. During shaping, the first reference line is used as the reference, meaning that regardless of the overall deformation of the phone's mid-plate, the value of the first reference line in the third shaping direction is 0 after it is aligned with the fixture. Specifically, one side of the material is referenced to the first reference line. The first deformation height of the first measurement point C along the third shaping direction of the material is measured, and the second deformation height of the second measurement point I along the third shaping direction of the material is measured. The first measurement point C is the height relative to the fixture plane when the first reference line is at point 0 on the fixture. The height of the second measurement point I relative to the fixture plane is the height of the entire phone's mid-plate. The deformation height is used to define the correction height for pressing down on the mobile phone midplate on the fixture: the correction height of the first measuring point C is -0.5 * the first deformation height, and the correction height of the second measuring point I is -0.5 * the second deformation height. That is, the first correction line is subjected to external force shaping at the first measuring point C and the second measuring point I according to 0.5 times the measured deformation height, so that the entire mobile phone midplate is simultaneously pressure-shaped along the first shaping line, the second shaping line, and the first correction line, allowing the deformation points of other parts to follow the shaping to achieve the shaping of the entire plane; that is, the first reference point A, the second reference point G, the first measuring point C, and the second measuring point I are used as a correction plane, and one side is used as a reference to apply pressure shaping to the other three sides. In this way, the deformation change of the middle part can be ignored, and the direction of the correction deformation force is more consistent, avoiding the situation that the internal force difference is easily generated when directly positioning the four points and then shaping.

[0030] To perform calibration measurements on each edge of the shaped mobile phone midplate, the midpoint of the first shaped connecting line can be selected as the first calibration point B. After shaped material, the height of the first calibration point B is measured to be -0.25 * the first deformation height, then the shaped material is qualified; that is, the height after shaped material is 50% of the first measurement point C, which means that the shaped material is qualified, and also indicates that the calibration of the overall first shaped connecting line meets the flatness requirements.

[0031] Meanwhile, the midpoint of the second shaping line is selected as the second correction point H. After shaping the material, the height of the second correction point H is measured to be -0.25 * the second deformation height. If the shaping is qualified, the flatness requirement of the second shaping line is also measured and verified.

[0032] To perform post-shaping correction testing on the middle position of the mobile phone midplate, the midpoint of the first reference line is selected as the third reference point D, and the midpoint of the first correction line is selected as the third correction point F. Along the first shaping direction of the material, the third reference point D and the third correction point F form the third shaping line, and the midpoint of the third shaping line is selected as the fourth correction point E. Before shaping, the line connecting the first reference point A, the second reference point G, and the third reference point D is the first curve, the line connecting the second measurement point I, the second measurement point I, and the third correction point F is the second curve, and the line connecting the first correction point B, the second correction point H, and the fourth correction point E is the third curve. The first curve, the second curve, and the third curve have the same curvature. By performing correction testing on the third shaping line of the mobile phone midplate, it is possible to further determine whether the entire mobile phone midplate meets the flatness requirements after shaping in the middle position.

[0033] Based on the above embodiments, the present invention also proposes a flatness shaping fixture that applies the above-mentioned flatness shaping method. After adopting the above-mentioned shaping method, the fixture can improve the consistency adjustment of the shaping process and enable the same batch of mobile phone mid-plates to achieve a shaping process with improved yield.

[0034] Specifically, such as Figures 2-5 As shown, the flatness shaping fixture includes a lower mold 1 and an upper mold 2. The lower mold 1 is provided with a shaping and positioning platform 3, and the upper mold 2 is provided with a pressure surface 4 that cooperates with the shaping and positioning platform 3. The shaping and positioning platform 3 is provided with a first reference point A, a first measuring point C, a second reference point G, and a second measuring point I. The correction height of the first measuring point C is -0.5 * the first deformation height, and the correction height of the second measuring point I is -0.5 * the second deformation height. The first measuring point C and the second measuring point I measure the deformation height of the corresponding position of the mobile phone mid-frame relative to the shaping and positioning platform 3 after it is placed on the shaping and positioning platform 3. The first measuring point C is shaped by -0.5 * the first deformation height, and the second measuring point I is shaped by -0.5 * the second deformation height, by adjusting the pressure surface 4. Thus, the flatness requirement of the mobile phone mid-frame is achieved after one shaping and extrusion.

[0035] Specifically, the lower mold 1 is provided with positioning blocks 5 located at the four corners, and the upper mold 2 is provided with positioning notches 6 that cooperate with the positioning blocks 5. The positioning blocks 5 and positioning notches 6 cooperate to achieve reliable positioning after the upper mold 2 and the lower mold 1 are closed.

[0036] The lower mold 1 is provided with a positioning hole 7 located between the two positioning blocks 5, and the upper mold 2 is provided with a positioning pin 8 for inserting into the positioning hole 7. The positioning pin 8 can be inserted into the positioning hole 7 to achieve a guiding function during the mold closing process.

[0037] Meanwhile, the shaping and positioning platform 3 is provided with a recessed structure for positioning the mobile phone midplate, which facilitates the placement of the mobile phone midplate during the shaping process.

[0038] To facilitate heating or cooling of the phone's midplate during the shaping process and to enable adjustments to the midplate during shaping, both the upper mold 2 and the lower mold 1 are equipped with heating or cooling modules.

[0039] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A planarity shaping method, comprising a material to be shaped, said material having mutually perpendicular first shaping direction, second shaping direction, and third shaping direction; characterized in that: A first reference point (A) and a first measuring point (C) are selected along the first shaping direction of the material, and the first reference point (A) and the first measuring point (C) are connected by a first shaping line; A second reference point (G) and a second measuring point (I) are selected along the first shaping direction of the material. The second reference point (G) and the second measuring point (I) are connected by a second shaping line, which is parallel to the first shaping line. Along the second shaping direction of the material, the first reference point (A) and the second reference point (G) are connected by a first reference line, and the first measuring point (C) and the second measuring point (I) are connected by a first correction line; Using the first reference line as a reference, measure the first deformation height of the first measuring point (C) along the third shaping direction of the material, and measure the second deformation height of the second measuring point (I) along the third shaping direction of the material. Based on the first reference line, the correction height of the first measurement point (C) is -0.5 * the first deformation height, and the correction height of the second measurement point (I) is -0.5 * the second deformation height.

2. The planarity shaping method according to claim 1, characterized in that: Select the midpoint of the first shaping line as the first correction point (B). After shaping the material, measure the height of the first correction point (B) and find that it is -0.25 * the first deformation height. Then the shaping is qualified.

3. The planarity shaping method according to claim 2, characterized in that: Select the midpoint of the second shaping line as the second correction point (H). After shaping the material, measure the height of the second correction point (H) and find that it is -0.25 * the second deformation height. Then the shaping is qualified.

4. The planarity shaping method according to claim 3, characterized in that: The midpoint of the first reference line is selected as the third reference point (D), the midpoint of the first correction line is selected as the third correction point (F), and along the first shaping direction of the material, the third reference point (D) and the third correction point (F) are connected by a third shaping line. The midpoint of the third shaping line is selected as the fourth correction point (E). The line connecting the first reference point (A), the second reference point (G), and the third reference point (D) is the first curve; the line connecting the second measurement point (I), the second measurement point (I), and the third correction point (F) is the second curve; and the line connecting the first correction point (B), the second correction point (H), and the fourth correction point (E) is the third curve. The first curve, the second curve, and the third curve have the same radian.

5. A flatness shaping fixture using the flatness shaping method as described in any one of claims 1-4, comprising a lower mold (1) and an upper mold (2), characterized in that: The lower mold (1) is provided with a shaping and positioning platform (3), and the upper mold (2) is provided with a pressure surface (4) that cooperates with the shaping and positioning platform (3). The shaping and positioning platform (3) is provided with a first reference point (A), a first measurement point (C), a second reference point (G), and a second measurement point (I). The correction height of the first measurement point (C) is -0.5 * the first deformation height, and the correction height of the second measurement point (I) is -0.5 * the second deformation height.

6. The flatness shaping fixture according to claim 5, characterized in that: The lower mold (1) is provided with positioning blocks (5) located at the four corners, and the upper mold (2) is provided with positioning notches (6) that are positioned and matched with the positioning blocks (5).

7. The flatness shaping fixture according to claim 6, characterized in that: The lower mold (1) is provided with a positioning hole (7) located between the two positioning blocks (5), and the upper mold (2) is provided with a positioning pin (8) for inserting into the positioning hole (7).

8. The flatness shaping fixture according to any one of claims 5-7, characterized in that: Both the upper mold (2) and the lower mold (1) have heating or cooling modules.

9. The flatness shaping fixture according to claim 5, characterized in that: The shaping and positioning platform (3) is provided with a recessed structure for positioning the middle plate of the mobile phone.

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