Manufacturing method of rotating shaft of folding machine

Abstract

The invention relates to the technical field of metal processing, and discloses a folding machine rotating shaft manufacturing method which comprises the following steps: S1, providing a blank which is provided with a forming blank for forming a rotating shaft and auxiliary blanks connected to two sides of the forming blank, and processing an outer side surface consistent with the appearance of a product on the forming blank; s2, an auxiliary blank is used for auxiliary positioning, a groove is machined in the forming blank, and a rotating shaft rough blank is formed; s3, the inner wall of the groove is machined, and a rotating shaft connected to the auxiliary blank is formed; and S4, the joint of the rotating shaft and the auxiliary blank is separated, and a rotating shaft finished product is formed. Firstly, a blank is formed through an aluminum extrusion material, a formed blank and an auxiliary blank are formed respectively, the formed blank is used for forming a product, the auxiliary blank is used for assisting in forming of the product, and the product is more easily generated on the formed blank through fixing and positioning of the auxiliary blank; and the grooves are firstly machined, so that subsequent blanking is easier, and the machining difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to a method for manufacturing a rotating shaft of a folding machine. Background Art

[0002] The hinge of a folding machine is an important component of folding electronic products such as folding mobile phones. It not only provides tight protection for folding electronic products, but also gives them a unique appearance and texture. As a key functional component of folding screen electronic products, the metal hinge plays a vital role in the screen experience of folding electronic products. The hinge is an axis installed on folding electronic products that allows the electronic products to rotate and fold. It enables the screen of electronic products to be folded and unfolded. The hinge is not only related to the appearance and portability of electronic products, but also directly affects the service life, durability and user experience of electronic products.

[0003] As people pursue personalization, the designs of the hinges of foldable electronic products are diverse. As a result, the structure of the hinges of foldable electronic products has become increasingly complex, and the difficulty of shape processing has become increasingly greater. How to reasonably and accurately process the appearance and inner cavity of the back shell has become a difficult problem. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a method for manufacturing a folding machine shaft to solve the problem of difficulty in processing the shaft of folding electronic products.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a method for manufacturing a folding machine shaft, comprising the following steps:

[0006] S1. Providing a blank, wherein the blank comprises a forming blank for forming a rotating shaft and auxiliary blanks connected to both sides of the forming blank, and the forming blank is processed with an outer side surface consistent with the appearance of the product;

[0007] S2, using the auxiliary blank as an auxiliary positioning device, machining a groove at the forming blank to form a rough blank of the rotating shaft;

[0008] S3, processing the inner wall of the groove to form a rotating shaft connecting the material to the auxiliary blank;

[0009] S4, separating the connection between the rotating shaft and the auxiliary blank to form a finished rotating shaft.

[0010] Furthermore, the step S2 includes the following sub-steps:

[0011] S21, processing a first reference surface on a first side surface of the auxiliary blank flush with the forming blank, and processing positioning structures penetrating the auxiliary blanks in the thickness direction at positions of the first reference surface corresponding to the two auxiliary blanks;

[0012] S22, using the positioning structure as auxiliary positioning, the groove is processed from the first reference surface of the forming blank, the groove has a first processing surface distributed along the thickness direction away from the first reference surface and two second processing surfaces relatively spaced apart along the width direction, so as to form a rough blank of the rotating shaft.

[0013] Furthermore, in the step S22: U-shaped hanger grooves are opened on the two auxiliary blanks in opposite directions, and the two hanger grooves are connected along the thickness direction.

[0014] Furthermore, the S3 step includes the following sub-steps:

[0015] S31, two protruding end blocks are processed on the first processing surface along the thickness direction, and the two end blocks are respectively arranged at two ends of the first processing surface along the length direction, and the two end blocks are processed respectively along the thickness direction to form a first avoidance groove open toward the first reference plane;

[0016] S32, processing the two second processing surfaces along the thickness direction to thin the two second processing surfaces to form a connecting surface connected to the auxiliary blank, and symmetrically processing a plurality of first protrusions connected to the first processing surface on the two connecting surfaces;

[0017] S33, a first molding cavity is machined on the first machining surface along the thickness direction, a third machining surface distributed along the thickness direction toward the side away from the first reference surface is machined on the first molding cavity, a plurality of first protrusions are machined on the cavity wall of the first molding cavity, and both sides of the first molding cavity along the width direction are respectively machined to form axial edges, and the first protrusion is connected to the axial edge, wherein the first machining surface is machined to form an end face on the side of the first avoidance groove facing the first molding cavity, and the middle part of the end face is concave toward the side of the third machining surface, so that both end blocks form end plates;

[0018] S34, processing the third processing surface along the thickness direction to process a second molding cavity, a plurality of second protrusions located in the second molding cavity, and a plurality of third protrusions located in the second molding cavity.

[0019] Furthermore, in the S32 step: there are two first protrusions and two second protrusions on the two axial edges, the two first protrusions are located between the two second protrusions and are spaced apart, the two second protrusions are arranged at both ends of the connecting surface along the length direction and are connected to the connecting surface; hanger holes are opened on the first reference surfaces of the two auxiliary blanks at the positions corresponding to the first protrusions in the thickness direction, and the hanger holes penetrate the material reduction surface along the thickness direction.

[0020] Furthermore, the step S34 includes the following sub-steps:

[0021] S341. Process the second protrusion along the thickness direction to form an outer wall surface, wherein the outer wall surface has an arc-shaped surface and straight surfaces respectively connected to the arc-shaped surfaces, and a first positioning groove is opened on the side of the second protrusion corresponding to the third processing surface to form a first positioning column, and the first positioning columns are provided in four numbers and are opened in sequence, and the straight surface of each of the first positioning columns is connected to the side cavity wall of the second molding cavity, and the connection between the first positioning column and the second molding cavity is chamfered.

[0022] Furthermore, the step S34 further includes the following sub-steps:

[0023] S342. The number of third protrusions is two and they are symmetrically distributed along the length direction.

[0024] Furthermore, the S342 includes the following sub-steps:

[0025] S3421, a first partition is processed from the third protrusion along the thickness direction to the bottom wall of the second molding cavity, the first partition is convexly arranged along the width direction and conforms to the cavity wall of the second molding cavity, two first concave arc surfaces distributed along the width direction are processed on one side of the first partition facing the first reference plane, and a convex wall is processed on the side surface of the two first partitions located between the two first concave arc edges and opposite to each other;

[0026] S3422. A second partition is machined from the third protrusion along the thickness direction to the bottom cavity wall of the second molding cavity. The two first partitions of the two third protrusions are located on the inner side of the second partition. The second partition is protruded along the width direction in accordance with the cavity wall of the second molding cavity. A second positioning column and a second concave arc surface are sequentially machined on the first side surface of the second partition facing the first reference surface. The second positioning column is machined at the middle position of the second partition and protrudes from the second concave arc surface. The second partition is machined toward one side of the first partition and located on both sides of the second positioning column to form a concave groove. The second positioning column is machined toward the side of the first partition to the bottom cavity arm of the second molding cavity so that a convex groove is formed between the first partition and the second partition.

[0027] Furthermore, the step S342 further includes the following sub-steps:

[0028] S3423. Two symmetrical second protrusions and two symmetrical third protrusions are processed in sequence from the third protrusion along the thickness direction to the bottom wall of the second molding cavity, and the two second protrusions and the two third protrusions are arranged along the width direction. The second protrusion is processed to have a straight section and a convex section protruding from the straight section, and the third protrusion is processed to have a third concave arc surface, thereby forming a rotating shaft.

[0029] Furthermore, in the step S4: the connecting surface is thinned along the thickness direction from one side of the first reference plane to the axis edge with the axis edge as the dividing line until the auxiliary blank and the rotating shaft are separated.

[0030] The manufacturing method of the folding machine shaft of the present invention has at least the following beneficial effects: first, a blank is formed by aluminum extrusion, and a molding blank and an auxiliary blank are formed separately. The molding blank is used to form the product, and the auxiliary blank is used to assist in the formation of the product. The auxiliary blank is fixed and positioned to make it easier to generate the product on the molding blank; the groove is processed first to make it easier to blank the material later, thereby reducing the processing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 The present invention is a process flow chart of the manufacturing method of the folding machine shaft of the present invention;

[0033] Figure 2 This is a schematic diagram after processing in step S1 of the present invention;

[0034] Figure 3 A schematic diagram of another angle after processing in step S1 of the present invention;

[0035] Figure 4 It is a processing flow chart of the sub-steps of step S2 in the present invention;

[0036] Figure 5 This is a schematic diagram after processing in step S21 of the present invention;

[0037] Figure 6 A schematic diagram of another angle after processing in step S21 of the present invention;

[0038] Figure 7 This is a schematic diagram after processing in step S22 of the present invention;

[0039] Figure 8 It is a processing flow chart of the sub-steps of step S3 in the present invention;

[0040] Fig. 9 It is a schematic diagram after processing in step S31 and step S32 of the present invention;

[0041] Fig.10 This is a schematic diagram after processing in step S33 of the present invention;

[0042] Fig.11 It is a processing flow chart of the sub-steps of step S34 in the present invention;

[0043] Fig.12 It is a processing flow chart of the sub-steps of step S34 in the present invention;

[0044] Fig.13This is a schematic diagram after processing in step S342 of the present invention;

[0045] Fig.14 A schematic diagram of another angle after processing in step S342 of the present invention;

[0046] Fig.15 It is a schematic diagram of another angle after processing in step S342 of the present invention.

[0047] The meanings of the symbols in the accompanying drawings are:

[0048] Auxiliary blank 1, first side surface 11, second side surface 12, first reference surface 13, first positioning hole 14, second positioning hole 15, height limit strip 161, second height limit platform 162, third height limit platform 163, second reference surface 17, hanger groove 18, molded blank 2, partition groove 21, first positioning column 22, arc surface 221, flat surface 222, groove 23, second processing surface 231, step groove 232, connecting surface 233, first protrusion 234, first protrusion 2341, second protrusion 2342, shaft edge 24, inner side surface 25, outer side surface 26, hanger hole 27, end block 28, first avoidance groove 281, first side groove 282, second side groove 283, second avoidance groove 284, first processing surface 29, third processing surface 30, first protrusion 31, special-shaped protrusion 311, third protrusion 312, first molding cavity 32, second molding cavity 33, bottom cavity arm 331, convex groove 332, third protrusion 35, first partition 351, first concave arc surface 352, convex wall 353, second partition 354, second positioning column 354, second concave arc surface 355, second protrusion 356, straight section 3561, convex section 3562, third protrusion 357. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] Please refer to Figures 1 to 15 In order to more clearly describe the embodiment of the present invention, the processing method of the folding machine shaft is used to process the folding electronic product shaft. The folding electronic product shaft includes a shaft, an outer side surface 26 and an inner side surface 25. The inner side surface 25 has a first positioning column 22, a second positioning column 354, a first partition 351, a second partition 354 and a plurality of first protrusions 31. For easy installation, end plates are also provided at both ends of the shaft. The inner side surface 25 is open toward one side along the thickness direction and is made of a metal material such as AL7N03. The manufacturing method of the folding machine shaft of the present invention includes the following steps:

[0051] S1. Provide a blank, wherein the blank comprises a forming blank 2 for forming a rotating shaft and auxiliary blanks 1 connected to both sides of the forming blank 2, and an outer side surface 26 consistent with the appearance of the product is processed on the forming blank 2.

[0052] Please refer to Figures 1 to 3 , in the step S1: the blank can be formed by aluminum extrusion, or by die casting, cutting, etc. The blank has a forming blank 2 for forming a rotating shaft and an auxiliary blank 1 connected to both sides of the forming blank 2, the blank has a first side 11 and a second side 12 opposite to the first side 11, that is, the forming blank 2 and the auxiliary blank 1 both have a first side 11 and an opposite second side 12, and the first side 11 and the second side 12 are distributed back to back in the thickness direction. In the illustrated embodiment, with the axis of the forming blank 2 as the symmetry line, the auxiliary blank 1 can be symmetrically arranged on both sides of the forming blank 2 along the width direction, the second side 12 of the forming blank 2 protrudes from the second side 12 of the auxiliary blank 1, and the first side 11 of the forming blank 2 and the first side 11 of the auxiliary blank 1 are located in the same plane and flush, thereby defining the cross-section of the forming blank 2 and the auxiliary blank 1 to be T-shaped.

[0053] In this step, the molded blank 2 is located in the middle of the auxiliary blank 1 along the width direction, and the molded blank 2 and the auxiliary blank 1 are consistent in length direction and distributed along the length direction. The outer side 26 of the molded blank 2 has an outer side 26 that is consistent with the outer side 26 of the product. The overall cross-section of the molded blank 2 is U-shaped. The thickness of the molded blank 2 is longer than the outer side 26 in the thickness direction relative to the thickness of the product shape, so as to facilitate subsequent processing. The auxiliary blank 1 is a rectangular parallelepiped structure, so it has four corners, four sides and two side surfaces.

[0054] S2, please refer to Figures 4 to 7 , using the auxiliary blank 1 as an auxiliary positioning, a groove 23 is processed at the forming blank 2 to form a rough blank of the rotating shaft.

[0055] The S2 step includes the following sub-steps:

[0056] S21, a first reference surface 13 is machined on a first side surface 11 flush with the auxiliary blank 1 and the forming blank 2, and positioning structures penetrating the auxiliary blank 1 along the thickness direction are machined at positions of the first reference surface 13 corresponding to the two auxiliary blanks 1.

[0057] In this embodiment, the first reference plane 13 is a horizontal plane parallel to the width direction and the length direction. The four corners of the first reference plane 13 all have L-shaped notches. The four L-shaped notches are formed by avoiding processing at the four corners of the first side surface 11, so that the first side surface 11 forms a first rectangular or rectangular height limit platform at the four corners of the first reference plane 13, so that when the first side surface 11 is used to face downward to fix the blank, the first reference plane 13 will not directly contact the fixture to increase wear and reduce burr formation. The first reference surface 13 is formed by machining the first side surface 11 except the four first height limits. For this purpose, the first reference surface 13 has two relatively distributed long sides and two relatively distributed short sides. A height limit strip 161 is convexly provided on the two long sides. The height of the height limit strip 161 is consistent with the height of the first height limit platform. The formation method is also to avoid machining the first side surface 11 of the corresponding shape and to form it on the first reference surface 13. The height limit strip 161 is a square strip structure. The first side surface 11 correspondingly avoids the square strip to open the first reference surface 13 to form the height limit strip 161. The height limit strip 161 has the same function as the first limit platform, so that when the fixture device clamps the auxiliary blank 1, it can better support the auxiliary blank 1 and prevent the auxiliary blank 1 from being pressed and bent. The positioning structure includes two first positioning holes 14 and two second positioning holes 15 distributed outside the two sides of the forming blank 2 in the width direction, and the two first positioning holes 14 are located in the middle of the auxiliary blank 1 in the length direction, and the two first positioning holes 14 are not in the same straight line in the width direction, so that the auxiliary blank 1 and the forming blank 2 can be positioned more firmly by the first positioning holes 14. Among them, the four corners of the second side surface 12 are removed along the thickness direction to basically determine the two end positions and the overall length of the product, and the subsequent inner side surface 25 processing is based on this, and the first height limit platform is removed in this processing. The two second positioning holes 15 are opened in this step, and the two second positioning holes 15 are distributed at two diagonal corners of one of the auxiliary blanks 1 to facilitate subsequent processing.

[0058] In this step, the outer side surface 26 of the formed blank 2 is processed according to the product outline, and the second side surface 12 is processed to be flush with the two opposite long sides of the outer side surface 26 to form a second reference surface 17. Second height limiting platforms 162 are protrudingly provided on the two long sides away from each other of the second reference surface 17. The second height limiting platform 162 is formed to avoid the processing of the second side surface 12 of the auxiliary blank 1, so that the clamping equipment can directly contact the second reference surface 17 when fixing the blank.

[0059] Partition grooves 21 are provided on the two long sides of the outer side surface 26 along the width direction. The two partition grooves 21 are provided on the two side sides of the forming blank 2 along the width direction. CNC processing equipment can be used to open them from both sides of the forming blank 2 along the width direction toward one side of the forming blank 2. The position of the partition groove 21 corresponds to the side where the outer side surface 26 and the inner side surface 25 of the product are connected, so as to facilitate the subsequent processing of the inner side surface 25 and the blanking with the partition groove 21 as a reference for processing and completing the division of the blanking.

[0060] S22, please refer to Figure 7 The groove 23 is machined from the first reference surface 13 of the blank 2 using the positioning structure as an auxiliary positioning. The groove 23 has a first machining surface 29 distributed along the thickness direction away from the first reference surface 13 and two second machining surfaces 231 relatively arranged along the width direction to form a rough blank of the rotating shaft.

[0061] In the step S22: U-shaped hanger grooves 18 are formed on the two auxiliary blanks 1 facing each other, and the two hanger grooves 18 are connected in the thickness direction. In particular, U-shaped hanger grooves 18 are formed on the two long sides of the two auxiliary blanks 1 facing each other, and the two hanger grooves 18 are connected in the thickness direction and in the width direction to form an open groove, and the two hanger grooves 18 are staggered to provide a hanging position during anodizing, so as to facilitate the use of the hanger. It should be noted that the hanger grooves 18 and the second height limiting platforms 162 are staggered and do not interfere with each other.

[0062] In this step, a groove 23 is machined from the first reference surface 13 of the molded blank 2 along the thickness direction toward the second side surface 12. The groove 23 is in a rectangular shape as a whole. The side of the groove 23 close to the second side surface 12 is the first processing surface 29, and the first processing surface 29 is parallel to the first reference surface 13. The two second processing surfaces 231 are parallel to each other and perpendicular to the first processing surface 29, and the groove 23 penetrates the molded blank 2 along the length direction to facilitate the processing of the inner side surface 25. In order to facilitate subsequent processing, a groove is machined on the first reference surface 13 of the two auxiliary blanks 1 and on one side facing the groove 23 along the thickness direction toward the second side surface 12 to form an L-shaped step groove 232 on the auxiliary blank 1. The step groove 232 penetrates the first reference surface 13 along the thickness direction, and the step groove 232 penetrates the auxiliary blank 1 along the length direction. The step groove 232 also penetrates the second processing surface 231 inwardly along the width direction to connect with the groove 23. The step groove 232 is used to reduce the depth of the groove 23 to facilitate subsequent processing.

[0063] S3, please refer to Figures 8 to 15 , the inner wall of the groove 23 is processed to form a rotating shaft connected to the auxiliary blank 1.

[0064] The S3 step includes the following sub-steps:

[0065] S31. Two protruding end blocks 28 are processed on the first processing surface 29 along the thickness direction, and the two end blocks 28 are arranged at both ends of the first processing surface 29 along the length direction. The two end blocks 28 are processed respectively along the thickness direction to form a first avoidance groove 281 open to the first reference surface 13.

[0066] The end block 28 in this step is convexly arranged toward one side of the first reference surface 13 along the thickness direction and is formed at the same time as the groove 23 is formed. The end block 28 is in the shape of a cuboid and is arranged along the width direction (referring to the width direction of the blank). The end block 28 is then processed: first, the top surface of the end block 28 (the side facing the first reference surface 13) is processed, and a first avoidance groove 281 is opened in the middle of the top surface of the end block 28 along the thickness direction. The length of the first avoidance groove 281 is opened along the length of the end block 28, and then the two ends of the first avoidance groove 281 are processed to form an arc end face, and then the end block 28 is continued to be processed, so that the two end blocks 28 are processed on the side facing outward along the length direction relative to the first avoidance groove 281 to process a T-shaped first side groove 282, and each corner of the first side groove 282 is rounded. The two end blocks 28 are processed on one side facing inward along the length direction relative to the first avoidance groove 281 to form an arc-shaped second side groove 283, and the second side groove 283 is formed after being processed to the first processing surface 29 and further processed to a certain depth. Subsequently, the outer side wall of the end block 28 is processed so that the two ends of the end block 28 are arc-shaped, and the middle part of the side surface facing inward of the end block 28 is recessed toward the first avoidance groove 281 to form a second avoidance groove 284.

[0067] S32, processing the two second processing surfaces 231 along the thickness direction to thin the two second processing surfaces 231 to form a connecting surface 233 connected to the auxiliary blank 1, and symmetrically processing a plurality of first protrusions 234 connected to the first processing surface 29 on the two connecting surfaces 233.

[0068] In this step, the two second processing surfaces 231 are opened in a mirror image, and can be processed from the first reference surface 13 to the second side surface 12 along the thickness direction, or the processing tool can be placed in the groove 23 and processed along the width direction toward the second processing surface 231. During processing, the two ends of the second processing surface 231 along the length direction are thinned respectively to facilitate subsequent processing. At the same time, the first convex block 234 with a rectangular structure is processed during thinning. The side of the first convex block 234 away from the groove 23 is flush with the outer side surface 26 of the molded blank 2, and each first convex block 234 is processed to the first processing surface 29 in the thickness direction.

[0069] In the step S32: two first protrusions 2341 and two second protrusions 2342 are provided on both side edges of the first processing surface 29 distributed along the width direction, the two first protrusions 2341 are located between the two second protrusions 2342 and are evenly spaced, the two second protrusions 2342 are arranged at both ends of the connecting surface 233 along the length direction and are connected to the connecting surface 233; hanger holes 27 are opened along the thickness direction at the positions corresponding to the first protrusions 2341 on the first reference surfaces 13 of the two auxiliary blanks 1, and the hanger holes 27 are directly opposite to the hanger groove 18 and the first protrusions 2341 along the width direction, and the hanger holes 27 are connected to the outer side surface 26 of the formed blank 2 and the groove 23 on the side close to the groove 23, so that the first protrusions 2341 are located in the hanger holes 27. Two hanger holes 27 are provided on each second processing surface 231 . The hanger holes 27 are provided to the position of the axial edge 24 , so as to provide a hanger position for the hanger during the subsequent anodizing process and reduce the material of the molded blank 2 .

[0070] S33, please refer to Fig.10 A first molding cavity 32 is machined on the first machining surface 29 along the thickness direction, a third machining surface 30 distributed along the thickness direction toward the side away from the first reference surface 13 is machined on the first molding cavity 32, a plurality of first protrusions 31 are machined on the cavity wall of the first molding cavity 32, and the two sides of the first molding cavity 32 along the width direction are respectively machined to form the axial edge 24, and the first protrusion 234 is connected to the axial edge 24, wherein the first machining surface 29 is machined into an end face on the side of the first avoidance groove 281 facing the first molding cavity 32, and the middle part of the end face is recessed toward the side of the third machining surface 30, so that both end blocks 28 form end plates.

[0071] In this step, the first molding cavity 32 can be formed by processing from one end to the other end in the length direction. The first molding cavity 32 is hollowed out during processing, and the shape and position of each first protrusion 31 are processed when processing the cavity wall. The shaft edge 24 is processed with the connection between the second processing surface 231 and the shaft edge 24 as the boundary. The connection between the first molding cavity 32 and the shaft edge 24 is chamfered at the position corresponding to the shaft edge 24 to distinguish the first molding cavity 32 from the second processing surface 231 for subsequent further processing. The first protrusion 31 is processed corresponding to the protruding structure of the inner side 25 of the product, and the position and shape are preliminarily demarcated for rough processing. The first protrusion 31 includes a special-shaped protrusion 311 and a third protrusion 312. The special-shaped protrusion 311 is processed with a special-shaped surface, and there are four special-shaped protrusions 311 that are dispersed in pairs along the width direction and opened on the cavity walls on both sides of the first molding cavity 32. The cavity wall of the first molding cavity 32 is processed into an arc shape except for the first protrusion 31 and the third processing surface 30. Each third protrusion 312 is processed and formed in the thickness direction relative to the cavity wall of the second molding cavity 33, and the third protrusion 312 is protruded inwardly from the cavity wall of the first molding cavity 32. The third processing surface 30 is a side surface of the first molding cavity 32 facing the second side surface 12 along the thickness direction, so as to be parallel to the first reference surface 13, and each first protrusion 31 is processed onto the third processing surface 30. In this step, the groove wall corresponding to the second avoidance groove 284 of the end block 28 is processed in the thickness direction to retain the second avoidance groove 284, so that the end block 28 forms an end plate.

[0072] S34, processing the third processing surface 30 along the thickness direction to process a second molding cavity 33, a plurality of second protrusions located in the second molding cavity 33, and a plurality of third protrusions 35 located in the second molding cavity 33.

[0073] The step S34 includes the following sub-steps:

[0074] S341. Process the second protrusion along the thickness direction to form an outer wall surface, the outer wall surface has an arc surface 221 and straight surfaces 222 respectively connected to the arc surface 221, and a third positioning hole is opened on the side of the second protrusion corresponding to the third processing surface 30 to form a first positioning column 22. The first positioning columns 22 are set to four and opened in sequence, and the straight surface 222 of each of the first positioning columns 22 is connected to the side cavity wall of the second molding cavity 33, and the connection between the first positioning column 22 and the second molding cavity 33 is chamfered.

[0075] In this step, the third processing surface 30 is processed from one end to the other end in the length direction. First, the position of the second protrusion is processed to produce the above-mentioned shape, wherein two first positioning posts 22 are located on one side along the width direction and are symmetrically spaced at both ends of this side. The other two first positioning posts 22 are located on the other side along the width direction and are symmetrically spaced at both ends of this side, and the first positioning posts on this side are offset from the two first positioning posts 22 on the other side. A third positioning hole is processed on each first positioning post 22, and the third positioning hole does not pass through the outer side surface.

[0076] S342. The number of third protrusions 35 is two and they are symmetrically distributed along the length direction.

[0077] The S342 includes the following sub-steps:

[0078] S3421. A first partition plate 351 is machined from the third protrusion 35 along the thickness direction to the bottom cavity wall of the second molding cavity 33 (i.e., the cavity wall of the second molding cavity 33 along the thickness direction facing away from the first reference plane 13). The first partition plate 351 is protruded along the width direction and conforms to the cavity wall of the second molding cavity 33. Two first concave arc surfaces 352 distributed along the width direction are machined on one side of the first partition plate 351 facing the first reference plane 13, and a convex wall 353 is machined on the opposite side surfaces of the two first partition plates 351 located between the two first concave arc surfaces 352.

[0079] S3422. A second partition 354 is machined from the third protrusion 35 along the thickness direction to the bottom cavity wall of the second molding cavity 33. The two first partitions 351 of the two third protrusions 35 are located on the inner side of the second partition 354. The second partition 354 is protruded along the width direction in accordance with the cavity wall of the second molding cavity 33. A second positioning column 354 and a second concave arc surface 355 are sequentially machined on the first side surface 11 of the second partition 354 facing the first reference surface 13. The second positioning column 354 is machined at the middle position of the second partition 354 and protrudes from the second concave arc surface 355. The second partition 354 is machined toward the side of the first partition 351 and located on both sides of the second positioning column 354 to form a concave groove. The second positioning column 354 is machined toward the side of the first partition 351 to the bottom cavity arm 331 of the second molding cavity 33 so that a convex groove 33223 is formed between the first partition 351 and the second partition 354. The first partition 351 and the second partition 354 are formed in accordance with the position of the third protrusion 312, so that the third protrusion 312 corresponding to the first partition 351 and the second partition 354 is a part of the first partition 351 and the second partition 354. A fourth positioning hole is formed on the second positioning column 354.

[0080] S3423, two symmetrical second protrusions 356 and two symmetrical third protrusions 357 are processed in sequence from the third protrusion 35 along the thickness direction to the bottom wall of the second molding cavity 33, and the two second protrusions 356 and the two third protrusions 357 are arranged along the width direction, the second protrusion 356 is processed with a straight section 3561 and a convex section 3562 protruding from the straight section 3561, and the third protrusion 357 is processed with a third concave arc surface, and the third protrusion 357 also corresponds to the third protrusion 312 in the first molding cavity 32, and the third protrusion 357 is processed and formed in accordance with the position of the corresponding third protrusion 312, and the third concave arc surface is processed and formed from the third protrusion 312. Finally, the cavity wall of the second molding cavity 33 is processed, and the first molding cavity 32 and the second molding cavity 33 are jointly surrounded to form the inner side surface 25, thereby forming a rotating shaft. Among them, the first positioning column 22 and the second positioning column 354 are not only the rotating shaft structure, but also for the convenience of subsequent blanking formation, so as to facilitate the subsequent blanking of the fixing column auxiliary blank 1. After the inner side surface 25 is processed, the auxiliary blank 1 and the forming blank 2 are cleaned and fully inspected as a whole to timely screen out unqualified products. The outer side surface 26 of the qualified products will be polished to remove burrs, etc., and then fixed through the hanger hole 27 and the hanger slot 18 for anodizing, and then cleaned and fully inspected again. After removing the unqualified products, the LOGO is laser engraved on the outer side surface 26 of the forming blank 2, and then cleaned and filmed.

[0081] In the step S4, the connecting surface 233 is thinned along the thickness direction from the first reference surface 13 to the axis edge 24 with the axis edge 24 as the dividing line until the auxiliary blank 1 is separated from the rotating shaft.

[0082] In this step, the axis edge 24 is used as a dividing line for segmentation, so that the connecting surface 233 is eliminated and the auxiliary blank 1 is separated from the forming blank 2. After separation, the forming blank 2 has a complete product outer side surface 26 and inner side surface 25 to complete the product processing. Finally, the other parts of the foldable electronic product are assembled and shipped.

Claims

1. A method for manufacturing a folding machine shaft, characterized in that: The following steps are involved: S1. Providing a blank, wherein the blank comprises a forming blank for forming a rotating shaft and auxiliary blanks connected to both sides of the forming blank, and the forming blank is processed with an outer side surface consistent with the appearance of the product; S2, using the auxiliary blank as an auxiliary positioning device, machining a groove at the forming blank to form a rough blank of the rotating shaft; S3, processing the inner wall of the groove to form a rotating shaft connecting the material to the auxiliary blank; S4, separating the connection between the rotating shaft and the auxiliary blank to form a finished rotating shaft.

2. The method for manufacturing a folding machine shaft according to claim 1, characterized in that: The S2 step includes the following sub-steps: S21, processing a first reference surface on a first side surface of the auxiliary blank flush with the forming blank, and processing positioning structures penetrating the auxiliary blanks in the thickness direction at positions of the first reference surface corresponding to the two auxiliary blanks; S22, using the positioning structure as auxiliary positioning, the groove is processed from the first reference surface of the forming blank, the groove has a first processing surface distributed along the thickness direction away from the first reference surface and two second processing surfaces relatively spaced apart along the width direction, so as to form a rough blank of the rotating shaft.

3. The method for manufacturing a folding machine shaft according to claim 2, characterized in that: In the step S22, U-shaped hanger grooves are provided on the two auxiliary blanks in opposite directions, and the two hanger grooves are connected in the thickness direction.

4. The method for manufacturing a folding machine shaft according to claim 3, characterized in that: The S3 step includes the following sub-steps: S31, two protruding end blocks are processed on the first processing surface along the thickness direction, and the two end blocks are respectively arranged at two ends of the first processing surface along the length direction, and the two end blocks are processed respectively along the thickness direction to form a first avoidance groove open toward the first reference plane; S32, processing the two second processing surfaces along the thickness direction to thin the two second processing surfaces to form a connecting surface connected to the auxiliary blank, and symmetrically processing a plurality of first protrusions connected to the first processing surface on the two connecting surfaces; S33, a first molding cavity is machined on the first machining surface along the thickness direction, a third machining surface distributed along the thickness direction toward the side away from the first reference surface is machined on the first molding cavity, a plurality of first protrusions are machined on the cavity wall of the first molding cavity, and both sides of the first molding cavity along the width direction are respectively machined to form axial edges, and the first protrusion is connected to the axial edge, wherein the first machining surface is machined to form an end face on the side of the first avoidance groove facing the first molding cavity, and the middle part of the end face is concave toward the side of the third machining surface, so that both end blocks form end plates; S34, processing the third processing surface along the thickness direction to process a second molding cavity, a plurality of second protrusions located in the second molding cavity, and a plurality of third protrusions located in the second molding cavity.

5. The method for manufacturing a folding machine shaft according to claim 4, characterized in that: In the step S32: two first protrusions and two second protrusions are provided on the two axial edges, the two first protrusions are located between the two second protrusions and are spaced apart, the two second protrusions are arranged at both ends of the connecting surface along the length direction and are connected to the connecting surface; hanger holes are provided on the first reference surfaces of the two auxiliary blanks at positions corresponding to the first protrusions in the thickness direction, and the hanger holes penetrate the material reduction surface in the thickness direction.

6. The method for manufacturing a folding machine shaft according to claim 4, characterized in that: The step S34 includes the following sub-steps: S341. Process the second protrusion along the thickness direction to form an outer wall surface, wherein the outer wall surface has an arc-shaped surface and straight surfaces respectively connected to the arc-shaped surfaces, and a first positioning groove is opened on the side of the second protrusion corresponding to the third processing surface to form a first positioning column, and the first positioning columns are provided in four numbers and are opened in sequence, and the straight surface of each of the first positioning columns is connected to the side cavity wall of the second molding cavity, and the connection between the first positioning column and the second molding cavity is chamfered.

7. The method for manufacturing a folding machine shaft according to claim 6, characterized in that: The step S34 also includes the following sub-steps: S342. The number of third protrusions is two and they are symmetrically distributed along the length direction.

8. The method for manufacturing a folding machine shaft according to claim 7, characterized in that: The S342 includes the following sub-steps: S3421, a first partition is processed from the third protrusion along the thickness direction to the bottom wall of the second molding cavity, the first partition is convexly arranged along the width direction and conforms to the cavity wall of the second molding cavity, two first concave arc surfaces distributed along the width direction are processed on one side of the first partition facing the first reference plane, and a convex wall is processed on the side surface of the two first partitions located between the two first concave arc edges and opposite to each other; S3422. A second partition is machined from the third protrusion along the thickness direction to the bottom cavity wall of the second molding cavity. The two first partitions of the two third protrusions are located on the inner side of the second partition. The second partition is protruded along the width direction in accordance with the cavity wall of the second molding cavity. A second positioning column and a second concave arc surface are sequentially machined on the first side surface of the second partition facing the first reference surface. The second positioning column is machined at the middle position of the second partition and protrudes from the second concave arc surface. The second partition is machined toward one side of the first partition and located on both sides of the second positioning column to form a concave groove. The second positioning column is machined toward the side of the first partition to the bottom cavity arm of the second molding cavity so that a convex groove is formed between the first partition and the second partition.

9. The method for manufacturing a folding machine shaft according to claim 8, characterized in that: The step S342 further includes the following sub-steps: S3423. Two symmetrical second protrusions and two symmetrical third protrusions are processed in sequence from the third protrusion along the thickness direction to the bottom wall of the second molding cavity, and the two second protrusions and the two third protrusions are arranged along the width direction. The second protrusion is processed to have a straight section and a convex section protruding from the straight section, and the third protrusion is processed to have a third concave arc surface, thereby forming a rotating shaft.

10. The method for manufacturing a folding machine shaft according to claim 9, characterized in that: In the step S4, the connecting surface is thinned along the thickness direction from one side of the first reference plane to the axis edge with the axis edge as the dividing line until the auxiliary blank is separated from the rotating shaft.

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