Computer shell BOSS column forming die, stamping process and computer shell

Abstract

The invention discloses a computer shell BOSS column forming die, a stamping process and a computer shell. The computer shell BOSS column forming die comprises a lower die and an upper die which is matched with the lower die and located above the lower die. The lower die comprises a lower die assembly provided with a bearing face used for bearing the computer shell, a plurality of positioning pins arranged on the bearing face and used for positioning the position of the computer shell and a first heating assembly arranged in the lower die assembly and capable of heating the bearing face. The upper die comprises an upper die assembly, a plurality of punches arranged at the lower end of the upper die assembly, a second heating assembly arranged on the upper die assembly and used for heating the upper die assembly, and a plurality of equal-height sleeves. After the upper die and the lower die are assembled, the multiple punches at the lower end of the upper die assembly can punch and form BOSS columns at the corresponding positions of the computer shell, the BOSS columns are integrally punched at the corresponding positions of the computer shell through the punches of the upper die, additional plastic parts do not need to be bonded, and the light and thin requirements of a notebook computer can be met; and the processing technology can be reduced and materials can be saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of notebook computer component processing, and particularly relates to a BOSS post forming mold for a computer shell, a stamping process, and a computer shell. Background Art

[0002] The notebook shell can buffer external impact forces, prevent internal hardware such as the motherboard, hard disk, and memory from being damaged by collision, or prevent internal components from being scratched by sharp objects, and is an important workpiece for protecting the body. In traditional notebook computers, since many key components such as the motherboard, hard disk, and radiator are installed inside, these components need to be firmly installed by screws. Therefore, it is necessary to bond a metal part (such as aluminum alloy or aluminum-magnesium alloy) with a plastic part having screw posts to complete the assembly with other components. However, after the metal part and the plastic part are bonded, the thickness of the shell part is increased, which cannot meet the requirement of the thin and light of the notebook computer. Summary of the Invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a BOSS post forming mold for a computer shell, a stamping process, and a computer shell.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A BOSS post forming mold for a computer shell, comprising:

[0006] A lower mold, the lower mold includes a lower mold assembly having a bearing surface for bearing a computer shell, a plurality of positioning pins provided on the bearing surface for positioning the position of the computer shell, and a first heating assembly provided in the lower mold assembly and capable of heating the bearing surface;

[0007] An upper mold, which cooperates with the lower mold and is located above the lower mold, the upper mold includes an upper mold assembly, a plurality of punches provided at the lower end of the upper mold assembly, a second heating assembly provided on the upper mold assembly for heating the upper mold assembly, and a plurality of equal-height sleeves;

[0008] When the upper mold and the lower mold are closed, a plurality of punches at the lower end of the upper mold assembly can punch and form BOSS posts at corresponding positions of the computer shell.

[0009] Further, a plurality of mounting cavities for mounting the punches are provided on the mold surface of the upper mold assembly close to the lower mold assembly, and a plurality of flow-blocking protrusions concentrically arranged with the mounting cavities are provided on the mold surface; the punch includes a punch body installed in the mounting cavity and a punch insert embedded in the punch body;

[0010] After the mold is closed, the punch body is used to punch out the internal cavity of the BOSS post, and the punch insert can cooperate with the flow blocking protrusion to punch out the columnar body of the BOSS post.

[0011] Further, the punch body includes a first rod body and a stamping head integrally formed at the lower end of the first rod body, and the outer diameter of the stamping head is smaller than the outer diameter of the first rod body;

[0012] The punch insert includes a second rod body and an annular boss integrally formed at the lower end of the second rod body. An embedding cavity for embedding the punch body is formed between the inner cavity of the second rod body and the inner cavity of the annular boss. After the punch body is embedded in the embedding cavity, the stamping head is exposed outside the annular boss. The axis of the stamping head coincides with the axis of the annular boss, and there is a height difference between the lower end surface of the annular boss and the lower end surface of the first rod body. The inner side wall of the embedding cavity, the lower end surface of the first rod body, and the outer side wall of the stamping head enclose an extrusion area for punching out the columnar body.

[0013] Further, the upper mold assembly includes an upper mold base, an upper heat insulation plate, an upper backing plate, an upper clamping plate, and an upper stripper plate arranged in sequence from top to bottom. One end of the installation cavity is distributed on the upper clamping plate and the other end is distributed on the upper stripper plate; when the mold is not closed, the end of the punch in contact with the workpiece to be processed is accommodated in the installation cavity. A plurality of first mounting holes are provided on the upper clamping plate, and a first spring is installed in each of the plurality of mounting holes in a one-to-one correspondence. The end of the first spring away from the upper backing plate is in contact with the upper stripper plate;

[0014] After the mold is closed, the upper clamping plate moving towards the upper stripper plate can make the punch extend out of the installation cavity to punch the workpiece to be processed.

[0015] Further, the second heating component includes a plurality of first heating coils arranged on the upper end surface of the upper clamping plate, a plurality of second heating coils arranged on the lower end surface of the upper clamping plate, and a plurality of third heating coils arranged on the upper end surface of the upper stripper plate. A plurality of first temperature sensing wires corresponding to the first heating coils one by one for sensing the temperature of the first heating coils are embedded on the upper clamping plate, and a plurality of second temperature sensing wires corresponding to the third heating coils one by one for sensing the temperature of the third heating coils are embedded on the upper stripper plate.

[0016] Further, the lower mold assembly includes a lower template, a lower clamping plate, a lower backing plate, a lower mold base, a plurality of lower feet, and a lower support plate arranged in sequence from top to bottom. The upper end surface of the lower template is defined as a bearing surface, and a plurality of inner limits are provided on the bearing surface for contacting the upper mold during mold closing to control the punching depth of the punch.

[0017] Further, the positioning pin includes a pin rod with one end disposed within the lower clamping plate and the other end extending outside the bearing surface, an equal-diameter section fixedly connected to the upper end of the pin rod and having an outer diameter smaller than that of the pin rod, and a variable-diameter section fixedly connected to the upper end of the equal-diameter section. A second spring is connected to the lower end of the pin rod, and the end with the largest cross-sectional area of the variable-diameter section is connected to the equal-diameter section.

[0018] Further, the first heating assembly includes a plurality of fourth heating coils disposed on the upper end surface of the lower clamping plate, and a plurality of fifth heating coils disposed on the lower end surface of the lower clamping plate. A plurality of third temperature sensing wires corresponding to the fourth heating coils one by one for sensing the temperature of the fourth heating coils are embedded in the lower template.

[0019] A stamping process uses the above computer case BOSS post forming die to stamp a computer case, including the following steps:

[0020] Step S1, preheating: Position the workpiece to be stamped above the bearing surface using the positioning pin, and preheat the die through the first heating assembly provided in the lower die and the second heating assembly provided in the upper die.

[0021] Step S2, blank holding: The upper die moves towards the lower die until the upper die presses against the upper end surface of the workpiece to be stamped, and the workpiece to be stamped is pressed through the cooperation of the upper die and the lower die.

[0022] Step S3, stamping: After the die is closed, the upper clamping plate moves downward, so that the punch extends from the lower end of the upper stripper plate to apply pressure to the workpiece to be stamped. Among them, the punch body can stamp out the internal cavity of the BOSS post, and the punch insert can form the columnar body of the BOSS post.

[0023] Step S4, die opening: The upper die moves away from the lower die to complete die opening and expose the processed and formed workpiece.

[0024] Step S5, taking out the workpiece: Naturally cool and shape it, and then use a tapping device to process a thread in the internal cavity.

[0025] A computer case is prepared by using the above stamping process.

[0026] In summary, the beneficial effects of the present invention are as follows: First, the punch of the upper die directly punches and forms the BOSS posts at the corresponding positions of the computer case, eliminating the need for additional bonding of plastic parts, avoiding the problem of increased thickness caused by bonding, facilitating the realization of the thin and light design of products such as laptop computers, and meeting the market demand for thin and light portable devices. Second, adopting the stamping and forming method, the BOSS posts can be formed in one stamping. Compared with the bonding process, it reduces multiple cumbersome processes such as surface treatment, gluing, and curing, significantly shortens the production cycle, and improves production efficiency. Moreover, the hot melt processing of plastic parts is no longer required, saving material and process costs. Third, the punch body and the punch insert respectively form the internal cavity and the columnar body of the BOSS post, enabling each part of the BOSS post to meet higher precision requirements, ensuring product quality and consistency. The punch insert and the flow-blocking protrusion cooperate with each other to restrict and guide the flow of materials during stamping, making the materials flow more concentratedly to the area that needs to be formed into the columnar body, avoiding the flow and waste of materials in unnecessary places, and improving the material utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural view of a computer case in the prior art.

[0028] Figure 2 is a schematic structural view of a forming die for BOSS posts of a computer case provided by the present invention.

[0029] Figure 3 is Figure 2 a three-dimensional structural view of the lower die in

[0030] Figure 4 is Figure 3 a partial enlarged view of part A in

[0031] Figure 5 is Figure 3 a top view of the lower clamping plate in

[0032] Figure 6 is a schematic view of a forming die for BOSS posts of a computer case provided by the present invention in the open die state.

[0033] Figure 7 is Figure 6 a three-dimensional structural view of the upper die in

[0034] Figure 8 is Figure 6 a partial enlarged view of part B in

[0035] Figure 9 is a cross-sectional view of the stamping end of the punch in the present invention.

[0036] Figure 10It is a schematic structural diagram of the stamping end of the punch in the present invention stamping a metal part.

[0037] Figure 11 It is a top view of the upper clamping plate in the present invention.

[0038] Figure 12 It is the computer shell product after stamping and forming in the present invention.

[0039] Figure 13 is Figure 12 a partial enlarged view of part C in

[0040] In the figure, 100 - computer shell, 110 - metal part, 111 - first region, 112 - second region, 113 - columnar body, 1130 - internal cavity, 120 - plastic part;

[0041] 200 - upper die assembly, 200A - screw, 200B - dowel pin, 210 - upper die base, 220 - upper heat insulation plate, 230 - upper backing plate, 231 - equal-height sleeve, 240 - upper clamping plate, 241 - first spring, 242 - inner guide pillar, 243 - first temperature sensing wire, 250 - upper stripper plate, 251 - flow blocking protrusion, 252 - second temperature sensing wire;

[0042] 300 - lower die assembly, 310 - lower template, 311 - bearing surface, 3110 - guiding cavity, 312 - third temperature sensing wire, 313 - inner limit, 320 - lower clamping plate, 330 - lower backing plate, 340 - lower die base, 350 - lower foot pad, 360 - lower supporting plate;

[0043] 400 - positioning pin, 410 - pin rod, 411 - second spring, 420 - equal-diameter section, 430 - variable-diameter section;

[0044] 500 - first heating assembly, 510 - fourth heating coil, 520 - fifth heating coil;

[0045] 600 - punch, 610 - punch body, 611 - first rod body, 6110 - limiting section, 612 - stamping head, 620 - punch insert, 621 - second rod body, 622 - annular boss, 630 - extrusion area;

[0046] 700 - second heating assembly, 710 - first heating coil, 720 - second heating coil, 730 - third heating coil;

[0047] 800 - plug. Detailed implementation mode

[0048] Please refer to Figure 1 , in the prior art, the computer shell 100 includes a metal part 110 and a plastic part 120 adhesively bonded to the metal part 110.

[0049] The present invention will be further described below in conjunction with specific illustrations.

[0050] Please refer to Figure 2 , the present invention provides a BOSS post forming mold for a computer housing, including a lower mold and an upper mold that cooperates with the lower mold and is located above the lower mold. The lower mold includes a lower mold assembly 300 having a bearing surface 311 for bearing the computer housing (i.e., the metal part 110, and the computer housing processed hereinafter refers to the metal part 110 in the prior art), a plurality of positioning pins 400 provided on the bearing surface 311 for positioning the computer housing, and a first heating assembly 500 provided in the lower mold assembly and capable of heating the bearing surface 311. The upper mold includes an upper mold assembly 200, a plurality of punches 600 provided at the lower end of the upper mold assembly 200, a second heating assembly 700 provided on the upper mold assembly 200 for heating the upper mold assembly 200, and a plurality of equal-height sleeves 231. Both the first heating assembly 500 and the second heating assembly 700 are connected to the power supply through a plug 800. After the upper mold and the lower mold are closed, a plurality of punches 600 at the lower end of the upper mold assembly 200 can punch and form BOSS posts at corresponding positions of the computer housing. This stamping mold directly punches and forms BOSS posts at corresponding positions of the computer housing through the punches 600 in the upper mold, without the need to additionally bond the plastic part 120, avoiding the problem of increased thickness caused by bonding the plastic part 120, contributing to the thin and light design of the notebook computer, and making it more in line with the market demand for thin and portable devices. By adopting the stamping forming method, the BOSS posts can be formed in one stamping. Compared with the bonding process, it reduces multiple cumbersome processes (such as surface treatment, gluing, curing, etc.), shortens the production cycle, and improves the production efficiency.

[0051] Please refer to Figure 3 , the lower mold assembly 300 includes a lower template 310, a lower clamping plate 320, a lower backing plate 330, a lower mold base 340, a plurality of lower feet 350, and a lower support plate 360 arranged in sequence from top to bottom. The upper end surface of the lower template 310 is defined as the bearing surface 311. The lower template 310, the lower clamping plate 320, the lower backing plate 330, the lower mold base 340, a plurality of lower feet 350, and the lower support plate 360 are connected together by screws 200A and pins 200B, which is convenient for disassembly and assembly. Please refer to Figure 4, the positioning pin 400 includes a pin rod 410 with one end disposed within the lower clamping plate 320 and the other end extending outside the bearing surface 311, an equal-diameter section 420 fixedly connected to the upper end of the pin rod 410 and having an outer diameter smaller than that of the pin rod 410, and a variable-diameter section 430 fixedly connected to the upper end of the equal-diameter section 420. The end with the largest cross-sectional area of the variable-diameter section 430 is connected to the equal-diameter section 420. A corresponding pin hole for cooperating with the positioning pin 400 is provided on the metal part 110, and the size of the pin hole is adapted to the outer diameter of the equal-diameter section 420. When the workpiece to be stamped (metal part 110) needs to be loaded on the lower die, the outer diameter of the variable-diameter section 430 gradually increases from being away from the equal-diameter section 420 to approaching the equal-diameter section 420. The variable-diameter section 430 can serve as a guiding structure to quickly guide the workpiece to be loaded. After the computer case is positioned, its bottom surface abuts against the upper end surface of the pin rod 410. A second spring 411 is connected to the lower end of the pin rod 410. After the mold is closed, the second spring 411 is compressed. The lower end surface of the workpiece contacts the bearing surface 311, and the upper end surface is pressed by the upper die surface. The compression of the spring can absorb part of the impact force, preventing the computer case from being damaged due to excessive instantaneous impact force, protecting the metal part 110 to be stamped, and improving the yield rate of the product. Additionally, please refer to Figure 6 , when the mold is opened, the second spring 411 returns to its original position, driving the positioning pin 400 to return to its original position. After returning, a part of the pin rod 410 is exposed outside the bearing surface 311, creating a gap between the workpiece and the bearing surface 311 for convenient material taking.

[0052] A number of inner limits 313 are provided on the bearing surface 311 for contacting the upper die during mold closing to control the stamping depth of the punch 600. The stamping depth of the punch 600 is crucial for the dimensional accuracy of structures such as BOSS columns formed by stamping. After the inner limit 313 contacts the upper die, it prevents the upper die from continuing to move downward, thereby limiting the maximum stamping stroke of the punch 600 and ensuring that the stamping depth of the punch 600 is consistent each time.

[0053] Please refer to Figure 2 and Figure 5 , the first heating assembly 500 includes a number of fourth heating coils 510 disposed on the upper end surface of the lower clamping plate 320, and a number of fifth heating coils 520 disposed on the lower end surface of the lower clamping plate 320. A number of third temperature sensing wires 312 corresponding to the fourth heating coils 510 one by one are embedded in the lower template 310 for sensing the temperature of the fourth heating coils 510, thereby obtaining the temperature information of the heating area of the lower die in real time. The operator can accurately understand the temperature state of the lower die.

[0054] The upper die assembly 200 is provided with a plurality of mounting cavities for mounting the punch 600 on the die surface close to the lower die assembly 300, and a plurality of flow-blocking protrusions 251 are provided on the die surface, which correspond to each other and are arranged concentrically with the mounting cavities. The punch 600 includes a punch body 610 installed in the mounting cavity and a punch insert 620 embedded in the punch body 610. After the mold is closed, the punch body 610 is used to punch out the internal cavity 1130 of the BOSS column, and the punch insert 620 can cooperate with the flow-blocking protrusion 251 to punch out the columnar body 113 of the BOSS column. The punch body 610 and the punch insert 620 respectively mold different parts of the BOSS column, so that the internal cavity 1130 and the columnar body 113 of the BOSS column can meet higher precision requirements, thereby ensuring the quality and consistency of the product.

[0055] See also Figure 7 The upper die assembly 200 includes an upper die base 210, an upper heat insulation plate 220, an upper pad 230, an upper clamping plate 240 and an upper stripping plate 250 which are arranged in sequence from top to bottom. One end of the installation cavity is distributed on the upper clamping plate 240 and the other end is distributed on the upper stripping plate 250. The upper die base 210, the upper heat insulation plate 220, the upper pad 230, the upper clamping plate 240 and the upper stripping plate 250 are connected together by screws 200A and pins 200B, which are convenient for disassembly and assembly. When the die is not closed, the end of the punch 600 that contacts the workpiece to be processed is accommodated in the installation cavity. The upper clamping plate 240 is provided with a plurality of first installation holes, and the first springs 241 are installed in the plurality of installation holes in a one-to-one correspondence. The end of the first spring 241 away from the upper pad 230 contacts the upper stripping plate 250. After the mold is closed, the upper stripper plate 250 moves toward the upper clamping plate 240 to allow the punch 600 to extend from the installation cavity to punch the workpiece, and the first spring 241 is compressed. After the mold is opened, the first spring 241 can cause the upper stripper plate 250 to return to its original position, which is convenient for the next processing. Figure 6 When in the mold opening state, the punch 600 is accommodated in the installation cavity, so that during the mold opening and closing process of the upper mold assembly 200, the punch 600 will not extend out at will and cause unnecessary interference with the lower mold assembly 300 or the workpiece to be processed.

[0056] See also Figure 8 and Figure 9, the punch body 610 includes a first rod body 611 and a stamping head 612 integrally formed at the lower end of the first rod body 611. The outer diameter of the stamping head 612 is smaller than that of the first rod body 611. The punch insert 620 includes a second rod body 621 and an annular boss 622 integrally formed at the lower end of the second rod body 621. An embedding cavity for embedding the punch body 610 is formed between the inner cavity of the second rod body 621 and the inner cavity of the annular boss 622. After the punch body 610 is embedded in the embedding cavity, the stamping head 612 is exposed outside the annular boss 622. A limiting section 6110 is provided at the top end of the punch 600 to limit the installation position of the punch body 610 in the embedding cavity. The axis of the stamping head 612 coincides with the axis of the annular boss 622, and there is a height difference between the lower end surface of the annular boss 622 and the lower end surface of the first rod body 611. An extrusion area 630 for extruding a columnar body 113 is formed by enclosing the inner side wall of the embedding cavity, the lower end surface of the first rod body 611, and the outer side wall of the stamping head 612. During stamping, specifically, please refer to Figure 10 , the stamping head 612 stamps the first area 111 of the workpiece. Since the stamping head 612 is an outward convex structure, the inner cavity 1130 of the BOSS post can be formed. The annular boss 622 stamps the second area 112 of the workpiece. The flow-blocking protrusion 251 is provided on the end surface of the upper stripper plate 250 close to the lower die. Under the combined extrusion of the stamping head 612 and the annular boss 622, the material enters the extrusion area 630 and is integrally formed into the columnar body 113 of the BOSS post. The punch insert 620 and the flow-blocking protrusion 251 cooperate with each other. During the stamping process, the flow-blocking protrusion 251 can play a certain role in restricting and guiding the flow of the material, making the material flow more concentratedly to the area where the columnar body 113 needs to be formed, avoiding the flow and waste of the material in unnecessary places, thereby improving the utilization rate of the material.

[0057] Please continue to refer to Figure 6 , an equal-height sleeve 231 is installed on the upper backing plate 230 and connected to the upper stripper plate 250 to limit the moving stroke of the upper stripper plate 250. When the mold is closed, the equal-height sleeve 231 restricts the upper stripper plate 250 from moving downwards excessively, avoiding the punch 600 applying too much pressure to the workpiece and damaging the workpiece or the punch 600; when the mold is opened, it ensures that the upper stripper plate 250 returns to the correct initial position, facilitating the smooth progress of the next mold closing operation, and thus ensuring the consistency and stability of each stamping operation.

[0058] A plurality of inner guide posts 242 for guiding during mold closing or mold opening are installed on the upper clamping plate 240 and are distributed at various corner positions of the upper clamping plate 240. One end of the inner guide post 242 away from the upper clamping plate 240 penetrates through the upper stripper plate 250 and is exposed outside the upper stripper plate 250. A guide cavity 3110 cooperating with the inner guide post 242 is provided at the corresponding position of the bearing surface 311. The inner guide post 242 and the guide cavity 3110 cooperate with each other to ensure that the upper die assembly 200 moves up and down along the correct path, enabling the punch 600 to accurately align with the target position on the workpiece to be processed for stamping, thereby improving the stamping accuracy.

[0059] Please refer to Figure 11 , the second heating assembly 700 includes a plurality of first heating coils 710 arranged on the upper end surface of the upper clamping plate 240, a plurality of second heating coils 720 arranged on the lower end surface of the upper clamping plate 240, and a plurality of third heating coils 730 arranged on the upper end surface of the upper stripper plate 250. A plurality of first temperature sensing wires 243 corresponding to the first heating coils 710 one by one for sensing the temperature of the first heating coils 710 are embedded in the upper clamping plate 240, and a plurality of second temperature sensing wires 252 corresponding to the third heating coils 730 one by one for sensing the temperature of the third heating coils 730 are embedded in the upper stripper plate 250. The heating coils on the same plate surface can provide different amounts of heat according to actual needs, making the temperature distribution of the upper die assembly 200 more uniform and reasonable, meeting the specific temperature requirements during the stamping process, and ensuring the quality of the stamping forming.

[0060] The working process of this forming die is as follows: Place the computer case to be stamped on the lower die. The positioning pins 400 on the bearing surface 311 of the lower die play a role. The variable-diameter section 430 of the positioning pin 400 serves as a guiding structure to guide the rapid loading of the computer case, making the pin holes on the computer case fit with the equal-diameter section 420 of the positioning pin 400. The bottom surface of the positioned computer case abuts against the upper end surface of the pin rod 410. The upper die moves downward to close the die with the lower die. During this process, the inner guide posts 242 of the upper die assembly 200 cooperate with the guiding cavities 3110 of the bearing surface 311 of the lower die to ensure that the upper die moves along the correct path, so that the punch 600 accurately aligns with the target position of the computer case. The upper stripper plate 250 presses against the upper end surface of the computer case. The upper clamping plate 240 and the punch 600 move towards the direction close to the upper stripper plate 250, compressing the first spring 241 on the upper clamping plate 240. The punch 600 extends out of the installation cavity, thereby stamping the computer case. At the same time, the second spring 411 at the lower end of the pin rod 410 of the lower die positioning pin 400 is compressed. The lower end surface of the computer case contacts the bearing surface 311 while the upper end surface is pressed by the upper stripper plate 250. The stamping head 612 of the punch 600 stamps the first area 111 of the computer case to form the internal cavity 1130 of the BOSS post; the annular boss 622 of the punch 600 stamps the second area 112 of the computer case. The punch insert 620 cooperates with the flow-blocking protrusion 251 on the upper stripper plate 250. The flow-blocking protrusion 251 restricts and guides the material flow, making the material concentrate and flow towards the extrusion area 630. Under the combined extrusion of the stamping head 612 and the annular boss 622, it is integrally formed into the columnar body 113 of the BOSS post. During this process, the inner limit 313 on the bearing surface 311 of the lower die contacts the upper die, preventing the upper die from continuing to move downward, limiting the maximum stamping stroke of the punch 600, and ensuring that the stamping depth of the punch 600 is consistent. After stamping, the upper die and the lower die are opened. The upper stripper plate 250 returns to its original position under the action of the first spring 241, and the punch 600 is accommodated in the installation cavity to avoid interference with the lower die assembly 300 or the workpiece. The second spring 411 of the lower die positioning pin 400 returns to its original position, driving the positioning pin 400 to return to its original position. Part of the pin rod 410 is exposed outside the bearing surface 311, forming a gap convenient for material taking between the workpiece and the bearing surface 311, facilitating the removal of the formed computer case workpiece.

[0061] A stamping and forming process uses the above-mentioned computer case BOSS post forming die to stamp the computer case, and the detailed steps are as follows:

[0062] Step S1, preheating: Pass the positioning pin through the pin holes on the computer case for the workpiece to be stamped, position the computer case above the bearing surface, and preheat the die through the first heating component 500 arranged in the lower die and the second heating component 700 arranged in the upper die. Sense the temperature of the heating coils at the corresponding positions through the first temperature sensing wire 243, the second temperature sensing wire 252, and the third temperature sensing wire 312. The preheating temperature is 230 °C.

[0063] Step S2, blank holding: The upper die moves towards the lower die until the upper die presses on the upper end surface of the workpiece to be stamped, and the workpiece to be stamped is pressed through the cooperation of the upper die and the lower die.

[0064] Step S3, stamping: After the die is closed, the upper clamping plate 240 moves downward, so that the stamping end of the punch extends from the lower end surface of the upper stripper plate 250 and applies pressure to the workpiece to be processed. Among them, please refer to Figure 12 and Figure 13 , the stamping head 612 of the punch 600 stamps the first area 111 of the computer case to form the internal cavity 1130 of the BOSS post; the annular boss 622 of the punch 600 stamps the second area 112 of the computer case, and the punch insert 620 cooperates with the flow blocking protrusion 251 on the upper stripper plate 250 to squeeze the material into the extrusion area 630 to form the columnar body 113 of the BOSS post.

[0065] Step S4, mold opening: The upper die moves away from the lower die. After the mold is opened, the processed and formed workpiece is exposed.

[0066] Step S5, taking out the workpiece and natural cooling and shaping. Then use a tapping device to process a thread in the internal cavity 1130. The tapping device is preferably a tapping machine.

[0067] This forming die, stamping process and computer case: First, the BOSS post is directly stamped and formed at the corresponding position of the computer case through the punch 600 of the upper die, without the need to additionally bond plastic parts, avoiding the problem of increased thickness caused by bonding, which helps to realize the thin and light design of products such as laptops and meets the market demand for thin and light portable devices. Second, adopting the stamping forming method, the BOSS post can be formed in one stamping. Compared with the bonding process, it reduces multiple cumbersome processes such as surface treatment, gluing, and curing, significantly shortens the production cycle, and improves production efficiency. And no longer perform hot melting processing on plastic parts, saving material and process costs. Third, the punch body 610 and the punch insert 620 respectively form the internal cavity 1130 and the columnar body 113 of the BOSS post, which can make each part of the BOSS post meet higher precision requirements, ensuring product quality and consistency. The punch insert 620 cooperates with the flow blocking protrusion 251 to play a role in restricting and guiding the flow of the material during stamping, making the material flow more concentratedly to the area that needs to be formed into the columnar body 113, avoiding the flow and waste of the material in unnecessary places, and improving the material utilization rate.

[0068] Please continue to refer to Figure 12 and Figure 13 , a computer case, a new computer case is prepared by the above stamping process, and the finally processed product is a metal part 110 with several stamped BOSS posts integrally formed on it.

[0069] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structures made by using the content of the specification and drawings of the present invention, directly or indirectly applied in other related technical fields, are similarly within the scope of the patent protection of the present invention in Japan.

Claims

1. A computer housing BOSS column forming mold, characterized in that: include: A lower mold, the lower mold comprising a lower mold assembly having a bearing surface for bearing a computer housing, a plurality of positioning pins disposed on the bearing surface for positioning the computer housing, and a first heating assembly disposed in the lower mold assembly and capable of heating the bearing surface; An upper die, which cooperates with the lower die and is located above the lower die, comprises an upper die assembly, a plurality of punches arranged at the lower end of the upper die assembly, a second heating assembly arranged on the upper die assembly for heating the upper die assembly, and a plurality of sleeves of equal height; When the upper die and the lower die are closed, a plurality of punches at the lower end of the upper die assembly can punch out BOSS columns at corresponding positions of the computer housing.

2. The computer housing BOSS column forming mold according to claim 1, characterized in that: The upper die assembly is provided with a plurality of mounting cavities for mounting the punches on a die surface close to the lower die assembly, and a plurality of flow-blocking protrusions are provided on the die surface corresponding to and concentrically arranged with the mounting cavities; the punch comprises a punch body mounted in the mounting cavity and a punch insert embedded in the punch body; After the mold is closed, the punch body is used to punch out the internal cavity of the BOSS column, and the punch insert can cooperate with the flow-blocking protrusion to punch out the columnar body of the BOSS column.

3. The computer housing BOSS column forming mold according to claim 2, characterized in that: The punch body comprises a first rod body and a punch head integrally formed at the lower end of the first rod body, wherein the outer diameter of the punch head is smaller than the outer diameter of the first rod body; The punch insert includes a second rod body and an annular boss integrally formed at the lower end of the second rod body, the inner cavity of the second rod body and the inner cavity of the annular boss form an embedding cavity for embedding the punch body, after the punch body is embedded in the embedding cavity, the punch head is exposed outside the annular boss, the axis of the punch head and the axis of the annular boss coincide with each other, and the lower end face of the annular boss has a height difference with the lower end face of the first rod body, the inner side wall of the embedding cavity, the lower end face of the first rod body and the outer side wall of the punch head together form an extrusion area for punching out the columnar body.

4. The computer housing BOSS column forming mold according to claim 2, characterized in that: The upper die assembly comprises an upper die seat, an upper heat insulation plate, an upper pad, an upper clamping plate and an upper stripping plate which are arranged in sequence from top to bottom, one end of the installation cavity is distributed on the upper clamping plate and the other end is distributed on the upper stripping plate; when the die is not closed, the end of the punch in contact with the workpiece to be processed is accommodated in the installation cavity, a plurality of first installation holes are arranged on the upper clamping plate, and first springs are installed in the plurality of installation holes in a one-to-one correspondence, and the end of the first spring away from the upper pad is in contact with the upper stripping plate; After the mold is closed, the upper clamping plate moves toward the direction close to the upper stripping plate so that the punch can extend out of the installation cavity to punch the workpiece to be processed.

5. The computer housing BOSS column forming mold according to claim 4, characterized in that: The second heating assembly includes a plurality of first heating coils arranged on the upper end surface of the upper clamping plate, a plurality of second heating coils arranged on the lower end surface of the upper clamping plate, and a plurality of third heating coils arranged on the upper end surface of the upper stripping plate. A plurality of first temperature-sensing wires corresponding one-to-one to the first heating coils for sensing the temperature of the first heating coils are embedded in the upper clamping plate, and a plurality of second temperature-sensing wires corresponding one-to-one to the third heating coils for sensing the temperature of the third heating coils are embedded in the upper stripping plate.

6. The computer housing BOSS column forming mold according to claim 2, characterized in that: The lower die assembly includes a lower die plate, a lower clamping plate, a lower pad, a lower die base, a plurality of lower pads and a lower support plate which are arranged in sequence from top to bottom. The upper end surface of the lower die plate is defined as a bearing surface, and a plurality of internal limit stops are provided on the bearing surface for contacting the upper die when the die is closed so as to control the stamping depth of the punch.

7. The computer housing BOSS column forming mold according to claim 6, characterized in that: The positioning pin includes a pin rod with one end arranged in the lower clamping plate and the other end extending out of the bearing surface, a constant diameter section fixed to the upper end of the pin rod and with an outer diameter smaller than that of the pin rod, and a variable diameter section fixed to the upper end of the constant diameter section. The lower end of the pin rod is connected to a second spring, and the end of the variable diameter section with the largest cross-sectional area is connected to the constant diameter section.

8. The computer housing BOSS column forming mold according to claim 7, characterized in that: The first heating assembly includes a plurality of fourth heating coils arranged on the upper end surface of the lower clamping plate, and a plurality of fifth heating coils arranged on the lower end surface of the lower clamping plate. The lower template is embedded with a plurality of third temperature-sensing wires corresponding one-to-one to the fourth heating coils for sensing the temperature of the fourth heating coils.

9. A stamping process, characterized in that: The computer case is stamped using the computer case BOSS column forming die according to any one of claims 1 to 8, comprising the following steps: Step S1, preheating, positioning the workpiece to be stamped above the bearing surface using a positioning pin, and preheating the mold through a first heating component provided in the lower mold and a second heating component provided in the upper mold; Step S2, pressing the material, the upper die moves toward the direction close to the lower die until the upper die is pressed on the upper end surface of the workpiece to be punched, and the workpiece to be punched is pressed by the cooperation between the upper die and the lower die; Step S3, stamping, after the mold is closed, the upper clamping plate moves downward, so that the punch extends from the lower end of the upper stripping plate to apply pressure to the workpiece to be stamped, wherein the punch body can stamp out the internal cavity of the BOSS column, and the punch insert can stamp out the columnar body of the BOSS column; Step S4, opening the mold, the upper mold moves in a direction away from the lower mold, completing the mold opening and exposing the processed workpiece; Step S5, taking out the workpiece, cooling it naturally to set it, and then using the tapping equipment to process the tapping in the internal cavity.

10. A computer housing, characterized in that: It is prepared by the stamping process of claim 9.

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