An integrated graded stamping die for a speaker basket

Abstract

This utility model relates to the field of stamping die technology, and discloses an integrated graded stamping die for a speaker frame, including an upper die and a lower die. The upper die includes a main pressure plate and an auxiliary pressure plate arranged vertically. Five waist-shaped dies and one cylindrical die are sleeved on the auxiliary pressure plate. A secondary pressure plate and a tertiary pressure plate are provided between the main pressure plate and the auxiliary pressure plate. The middle waist-shaped die and the cylindrical die are fixed on the tertiary pressure plate, the two outermost waist-shaped dies are fixed on the main pressure plate, and the remaining two middle waist-shaped dies are fixed on the secondary pressure plate. The lower die includes a die base plate and a die seat. The die seat has waist-shaped die holes corresponding to the five waist-shaped dies and circular die holes corresponding to the cylindrical die. This invention solves the problem of cumbersome processes and low production efficiency caused by the need to stamp the waist-shaped holes and the circular holes in stages; it also overcomes the frame tearing defect caused by concentrated force when stamping multiple waist-shaped holes simultaneously, thus reducing the scrap rate.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to an integrated graded stamping die for a speaker basket. Background Technology

[0002] In the loudspeaker manufacturing industry chain, the loudspeaker frame, as a key structural component supporting the vibration system and magnetic circuit system, directly affects the acoustic performance and structural stability of the loudspeaker due to its processing precision. Currently, loudspeaker frames 9 in the industry are generally processed using stamping technology. For aesthetic, assembly, or performance requirements, multiple sets of evenly distributed circumferentially distributed oblong holes 91 and multiple evenly distributed round holes 92 are formed on it. Each oblong hole set contains 5 oblong holes arranged radially and closely. The round holes and oblong hole sets have a one-to-one correspondence, as shown in the instruction manual. Figure 6 The speaker basket shown.

[0003] The existing processing mode suffers from significant technical bottlenecks: First, the separation of processes leads to low efficiency. The oblong hole group and the round hole need to be stamped separately using two independent molds in multiple batches, increasing mold changeover time and equipment occupancy costs, and extending the production cycle of a single batch by approximately 40%. Second, simultaneous stamping causes quality defects. The current oblong hole group processing uses a 5-hole simultaneous stamping method. Due to the small hole spacing (usually only 3-5mm), the material is subjected to instantaneous stress concentration during stamping, making this area of ​​the frame prone to stress tearing, resulting in a scrap rate as high as 15%-20%, especially when using high-strength steel plates (thickness 0.8-1.2mm). Third, secondary positioning affects accuracy. The round hole needs to be repositioned during secondary stamping, which can easily cause hole position deviations (usually ±0.3mm or more), leading to poor fit with other components during subsequent assembly. These problems severely restrict the large-scale and efficient production of speaker frames. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated graded stamping mold for speaker baskets, which solves the problems of complicated processes and low production efficiency caused by the need to stamp the waist-shaped hole group and the round hole in stages; overcomes the basket tearing defect caused by the concentrated force when stamping multiple waist-shaped holes at the same time, and reduces the scrap rate.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: An integrated graded stamping die for a loudspeaker basket includes an upper die and a lower die. The upper die includes a main pressure plate and an auxiliary pressure plate arranged vertically. Five waist-shaped stamping dies and one cylindrical stamping die are sleeved on the auxiliary pressure plate. A secondary pressure plate and a tertiary pressure plate are provided between the main pressure plate and the auxiliary pressure plate; a gap is left between the main pressure plate and the secondary pressure plate, between the secondary pressure plate and the tertiary pressure plate, and between the tertiary pressure plate and the auxiliary pressure plate; The middle waist-shaped punch and cylindrical punch are fixed on the third-level pressure plate, the two outermost waist-shaped punches are fixed on the main pressure plate, and the remaining two middle waist-shaped punches are fixed on the second-level pressure plate. The lower die includes a die base plate and a die seat. The die seat has waist-shaped die holes corresponding to the five waist-shaped punches and circular die holes corresponding to the cylindrical punches.

[0006] In use, the main pressure plate of the upper die is fixedly connected to the liftable pressure head of the stamping machine, and the bottom plate of the lower die is fixed on the working platform of the stamping machine. The speaker frame to be stamped is placed on the mold base. The lifting pressure head moves the main pressure plate downward, and the auxiliary pressure plate moves downward with the main pressure plate and first presses against the speaker frame to press and position the frame. Then the main pressure plate continues to move downward and moves the two outermost waist-shaped punches downward. The two outermost waist-shaped punches pass through the speaker frame to stamp and form the two outermost waist-shaped holes. Then the main pressure plate continues to move downward and moves the secondary pressure plate downward. The secondary pressure plate moves the two middle waist-shaped punches downward and passes through the speaker frame to complete the stamping and forming of the two middle waist-shaped holes. Then the main pressure plate continues to move the secondary pressure plate downward. After the secondary pressure plate is against the tertiary pressure plate, it moves the tertiary pressure plate downward. The tertiary pressure plate moves the middle waist-shaped punch and the round punch downward, thereby stamping and forming the middle waist-shaped hole and the round hole on the speaker frame. By stamping multiple similarly positioned oblong holes in a graded and sequential manner, tearing problems occurring in the stamping area during the stamping process can be effectively prevented. Furthermore, when stamping the inner oblong holes, a corresponding oblong die is inserted into the outer oblong holes, ensuring that the pre-formed oblong holes maintain a good shape. Simultaneously, the round holes on the speaker frame can be stamped in one step along with the oblong holes, reducing stamping processes and improving stamping efficiency.

[0007] The present invention is further configured such that: the auxiliary pressure plate is formed with a groove with an upper opening, the bottom surface of the groove is connected to the bottom surface of the main pressure plate by a first spring, the bottom surface of the groove is connected to the bottom surface of the secondary pressure plate by a second spring, and the bottom surface of the groove is connected to the bottom surface of the tertiary pressure plate by a third spring.

[0008] When the main pressure plate drives the outermost waist-shaped die to perform the stamping work, the first spring is compressed and accumulates elastic potential energy. Similarly, when the secondary pressure plate drives the middle waist-shaped die to perform the stamping work, the second spring is compressed and accumulates elastic potential energy. The third spring is compressed by the tertiary pressure plate and accumulates elastic potential energy. When the punching work on the speaker frame is completed, the lifting pressure head drives the main pressure plate to move up, and the main pressure plate releases the pressure on the secondary and tertiary pressure plates. Under the action of the elastic potential energy of the second and third springs, the secondary and tertiary pressure plates move up and reset relative to the auxiliary pressure plate. The first spring can restore the original distance between the auxiliary pressure plate and the main pressure plate.

[0009] This utility model is further configured such that: multiple first springs are symmetrically arranged on both sides of the secondary pressure plate; multiple second springs are symmetrically arranged on both sides of the tertiary pressure plate; and multiple third springs are arranged in the lower center of the tertiary pressure plate. The symmetrical arrangement of multiple first springs ensures uniform force distribution on the main pressure plate; similarly, the symmetrical arrangement of multiple second springs and the arrangement of the third springs in the middle region of the tertiary pressure plate ensure uniform force distribution on both the secondary and tertiary pressure plates.

[0010] The present invention is further configured such that: multiple sleeves are fixed to the edge of the main pressure plate, and stepped holes penetrating the main pressure plate are formed on the sleeves; a stepped tie rod is sleeved in the stepped hole; and the lower end of the stepped tie rod is fixedly connected to the auxiliary pressure plate.

[0011] During the downward pressing process, the main pressure plate moves closer to the auxiliary pressure plate. At this time, the step tie rod can move upward relative to the step hole without being affected. When the main pressure plate moves upward and resets, the step tie rod moves downward relative to the step hole. When the step surface of the step tie rod contacts the step surface of the step hole, the main pressure plate can drive the auxiliary pressure plate to move upward through the step tie rod, which can prevent the auxiliary pressure plate from falling off and limit the distance between the main pressure plate and the auxiliary pressure plate.

[0012] The present invention is further configured such that: a waste material cavity is formed inside the mold base and communicates with the waist-shaped mold hole and the circular mold hole, and an outlet is provided at the bottom of the waste material cavity.

[0013] The waste material punched by the waist-shaped die and the waste material punched by the round die and the round die can automatically fall into the waste material cavity and be discharged through the outlet, ensuring that the waste material has an outlet.

[0014] The present invention is further configured such that: the outlet is located on the front side, i.e. facing the workers, which facilitates the workers in handling waste. The front side is located in the middle cavity area of ​​the speaker frame, with more space, so it will not interfere with or touch the installation of the speaker frame during the stamping process. If the outlet is located on the rear side or other sides, it may come into contact with the edge of the speaker frame. The bottom of the waste chamber is provided with an inclined surface, the lower end of which extends to the outlet. Waste in the waste chamber can automatically slide down the inclined surface, which can effectively prevent waste from accumulating.

[0015] The present invention is further configured such that: a guide column is fixed on the mold base plate, and the upper end of the guide column is formed with a rounded corner or a cone shape; A guide sleeve is fixed on the main pressure plate. The guide sleeve can be inserted into the guide column to align the upper and lower dies, and then align the corresponding punches and die holes.

[0016] The present invention is further configured such that the upper end of the waist-shaped die hole is formed with a flared groove. The flared groove allows the waist-shaped die to form a downward-facing convex ring on the speaker frame during the downward punching process, thereby further improving the structural strength of the speaker frame.

[0017] The outstanding effect of this utility model is: Compared with existing technologies, by setting a main pressure plate, a secondary pressure plate, and a tertiary pressure plate, it is possible to perform graded and sequential stamping of five similarly positioned oblong holes. This graded and sequential stamping method can effectively disperse the stamping pressure, prevent tearing problems in this part during the stamping process, and improve the product quality of the speaker frame.

[0018] By integrating the round holes and waist-shaped holes on the speaker frame into the same mold, the process can be completed in one stamping, reducing the stamping process and significantly improving stamping efficiency.

[0019] When stamping the inner waist-shaped hole, a corresponding waist-shaped die is inserted into the already formed outer waist-shaped hole. This die supports the pre-formed waist-shaped hole, maintaining its shape and ensuring the machining accuracy of the hole.

[0020] The waste chamber and bottom slope allow the waste generated during stamping to automatically slide down the slope and be discharged through the outlet, effectively preventing waste accumulation and ensuring the smooth operation of the stamping process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 A view of A; Figure 4 for Figure 2 A view about B; Figure 5 for Figure 2 A view of C; Figure 6 This is a schematic diagram of the assembly of the present invention and the speaker frame.

[0022] Reference numerals: 1. Upper die; 11. Main pressure plate; 12. Auxiliary pressure plate; 13. Waist-shaped punch die; 14. Cylindrical punch die; 15. Secondary pressure plate; 16. Tertiary pressure plate; 17. Slot; 18. First spring; 19. Second spring; 110. Third spring; 112. Sleeve; 113. Stepped hole; 114. Stepped tie rod; 115. Guide sleeve; 2. Lower die; 21. Die base plate; 22. Die base; 23. Waist-shaped die hole; 24. Circular die hole; 25. Waste material cavity; 26. Exit; 27. Inclined surface; 28. Guide column; 29. ​​Flared slot; 9. Speaker frame; 91. Waist-shaped hole group; 92. Circular hole. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] The following is for reference Figures 1 to 6 The present invention will be described as follows: An integrated graded stamping die for a speaker basket, such as Figure 1 , Figure 2 , Figure 3 As shown, it includes an upper mold 1 and a lower mold 2. The upper mold 1 includes a main pressure plate 11 and an auxiliary pressure plate 12 arranged vertically. Five waist-shaped punches 13 and one cylindrical punch 14 are sleeved on the auxiliary pressure plate 12. A secondary pressure plate 15 and a tertiary pressure plate 16 are provided between the main pressure plate 11 and the auxiliary pressure plate 12. There are gaps between the main pressure plate 11 and the secondary pressure plate 15, between the secondary pressure plate 15 and the tertiary pressure plate 16, and between the tertiary pressure plate 16 and the auxiliary pressure plate 12. The middle waist-shaped punch 13 and cylindrical punch 14 are fixed on the third-level pressure plate 16, the two outermost waist-shaped punches 13 are fixed on the main pressure plate 11, and the remaining two middle waist-shaped punches 13 are fixed on the second-level pressure plate 15.

[0025] The lower mold 2 includes a mold base plate 21 and a mold base 22. The mold base 22 has waist-shaped mold holes 23 corresponding to the five waist-shaped punches 13 and circular mold holes 24 corresponding to the cylindrical punches 14.

[0026] like Figure 2 , Figure 4As shown, the auxiliary pressure plate 12 has a recessed groove 17 with an upper opening. The bottom surface of the recessed groove 17 is connected to the bottom surface of the main pressure plate 11 by a first spring 18, and the bottom surface of the recessed groove 17 is connected to the bottom surface of the secondary pressure plate 15 by a second spring 19. The bottom surface of the recessed groove 17 is connected to the bottom surface of the tertiary pressure plate 16 by a third spring 110. Multiple first springs 18 are symmetrically arranged on both sides of the secondary pressure plate 15, multiple second springs 19 are symmetrically arranged on both sides of the tertiary pressure plate 16, and multiple third springs 110 are arranged in the lower center of the tertiary pressure plate 16. The symmetrical arrangement of multiple first springs 18 ensures uniform force on the main pressure plate 11. Similarly, the symmetrical arrangement of multiple second springs 19 and the arrangement of the third springs 110 in the middle region of the tertiary pressure plate 16 ensure uniform force on both the secondary pressure plate 15 and the tertiary pressure plate 16.

[0027] like Figure 5 As shown, multiple sleeves 112 are fixed to the edge of the main pressure plate 11. A stepped hole 113 is formed on the sleeve 112, penetrating the main pressure plate 11. A stepped tie rod 114 is sleeved in the stepped hole 113. The lower end of the stepped tie rod 114 is fixedly connected to the auxiliary pressure plate 12.

[0028] During the downward pressing process, the main pressure plate 11 moves closer to the auxiliary pressure plate 12. At this time, the step tie rod 114 can move upward relative to the step hole 113 without being affected. When the main pressure plate 11 moves upward and resets, the step tie rod 114 moves downward relative to the step hole 113. When the step surface of the step tie rod 114 contacts the step surface of the step hole 113, the main pressure plate 11 can drive the auxiliary pressure plate 12 to move upward through the step tie rod 114, which can prevent the auxiliary pressure plate 12 from falling off and limit the distance between the main pressure plate 11 and the auxiliary pressure plate 12.

[0029] like Figure 2 As shown, the die base 22 has a waste material cavity 25 formed therein, which communicates with the waist-shaped die hole 23 and the circular die hole 24. The bottom of the waste material cavity 25 is provided with an outlet 26. The waste material punched by the waist-shaped die 13 in conjunction with the waist-shaped die hole 23 and the waste material punched by the circular die in conjunction with the circular die hole 24 can automatically fall into the waste material cavity 25 and be discharged through the outlet 26, which can ensure that the waste material has an outlet.

[0030] The outlet 26 is located on the front side, facing the staff, which facilitates the handling of waste materials. The front side is located in the central cavity area of ​​the speaker frame 9, with ample space, so it will not interfere with or touch the installation of the speaker frame 9 during the stamping process. If the outlet 26 is located on the rear side or other sides, it may come into contact with the edge of the speaker frame 9. The bottom of the waste material cavity 25 is provided with a slope 27, and the lower end of the slope 27 extends to the outlet 26. The waste material in the waste material cavity 25 can automatically slide down the slope 27, which can effectively prevent the accumulation of waste material.

[0031] A guide column 28 is fixed on the mold base plate 21, and the upper end of the guide column 28 is formed with rounded corners or a cone shape; A guide sleeve 115 is fixed on the main pressure plate 11. The guide sleeve 115 can be inserted into the guide column 28 to align the upper mold 1 and the lower mold 2, thereby aligning the corresponding punch and die hole.

[0032] The upper end of the waist-shaped die hole 23 is formed with a flared groove 29. The flared groove allows the waist-shaped die 13 to form a downward-facing convex ring on the speaker frame 9 during the downward punching process, thereby further improving the structural strength of the speaker frame 9.

[0033] Stamping operation: First, the main pressure plate 11 of the upper die 1 is fixedly connected to the liftable pressure head of the stamping machine, and the die base plate 21 of the lower die 2 is fixed on the working platform of the stamping machine. The guide sleeve 115 on the main pressure plate 11 cooperates with the guide column 28 on the die base plate 21 to ensure that the upper die 1 and the lower die 2 are precisely aligned.

[0034] Second, accurately place the speaker frame 9 to be stamped on the mold base 22 of the lower mold 2, start the stamping machine, and the lifting pressure head drives the main pressure plate 11 to move down. The auxiliary pressure plate 12 moves down with the main pressure plate 11 and first presses against the speaker frame 9. The pressure of the auxiliary pressure plate 12 is used to press and position the frame to prevent displacement of the frame during the stamping process. At this time, the state is as follows: Figure 6 As shown.

[0035] Third, the main pressure plate 11 continues to move downwards. At this time, the auxiliary pressure plate 12 maintains its pressing state on the speaker frame. The main pressure plate 11 drives the two outermost waist-shaped punches 13 to move downwards. The two outermost waist-shaped punches 13 pass through the speaker frame 9 and cooperate with the corresponding waist-shaped die holes 23 on the die base 22 to complete the stamping of the two outermost waist-shaped holes. During this process, the first spring 18 between the bottom surface of the recess 17 of the auxiliary pressure plate 12 and the bottom surface of the main pressure plate 11 is compressed. The main pressure plate 11 continues to move downwards. When the main pressure plate 11 contacts the secondary pressure plate 15, it drives the secondary pressure plate 15 to move downwards. The secondary pressure plate 15 drives the two middle waist-shaped punches 13 to move downwards. The two middle waist-shaped punches 13 pass through the speaker frame 9 and cooperate with the corresponding waist-shaped die holes 23 to complete the stamping of the two middle waist-shaped holes. At this time, the second spring 19 between the bottom surface of the recess 17 and the bottom surface of the secondary pressure plate 15 is compressed. The main pressure plate 11 continues to drive the secondary pressure plate 15 downwards. When the secondary pressure plate 15 contacts the tertiary pressure plate 16, it drives the tertiary pressure plate 16 downwards. The tertiary pressure plate 16 then drives the central waist-shaped die 13 and cylindrical die 14 downwards. The central waist-shaped die 13 engages with the corresponding waist-shaped die hole 23, and the cylindrical die 14 engages with the circular die hole 24, completing the stamping of the central waist-shaped hole and the circular hole. During this process, the third spring 110 between the bottom surface of the countersink 17 and the bottom surface of the tertiary pressure plate 16 is compressed.

[0036] Fourth, after the stamping is completed, the lifting pressure head drives the main pressure plate 11 to move upward, and the main pressure plate 11 releases the pressure on the secondary pressure plate 15 and the tertiary pressure plate 16. The secondary pressure plate 15 moves upward and resets under the elastic force of the second spring 19, and the tertiary pressure plate 16 moves upward and resets under the elastic force of the third spring 110. The auxiliary pressure plate 12 restores the initial distance with the main pressure plate 11 under the elastic force of the first spring 18. The step tie rod 114 can prevent the auxiliary pressure plate 12 from detaching from the main pressure plate 11.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A speaker basket integrated grading stamping die, comprising an upper die (1) and a lower die (2), characterized in that: The upper mold (1) includes a main pressure plate (11) and an auxiliary pressure plate (12) arranged on the upper and lower sides. Five waist-shaped punches (13) and one cylindrical punch (14) are sleeved on the auxiliary pressure plate (12). A secondary pressure plate (15) and a tertiary pressure plate (16) are provided between the main pressure plate (11) and the auxiliary pressure plate (12); a gap is left between the main pressure plate (11) and the secondary pressure plate (15), between the secondary pressure plate (15) and the tertiary pressure plate (16), and between the tertiary pressure plate (16) and the auxiliary pressure plate (12); The middle waist-shaped punch (13) and cylindrical punch (14) are fixed on the third-level pressure plate (16), the two outermost waist-shaped punches (13) are fixed on the main pressure plate (11), and the remaining two middle waist-shaped punches (13) are fixed on the second-level pressure plate (15). The lower die (2) includes a die base plate (21) and a die base (22). The die base (22) has waist-shaped die holes (23) corresponding to the five waist-shaped punches (13) and circular die holes (24) corresponding to the cylindrical punches (14).

2. The integrated graded stamping die for a speaker basket according to claim 1, characterized in that: The auxiliary pressure plate (12) has a sink (17) with an upper opening. The bottom surface of the sink (17) and the bottom surface of the main pressure plate (11) are connected by a first spring (18). The bottom surface of the sink (17) and the bottom surface of the secondary pressure plate (15) are connected by a second spring (19). The bottom surface of the sink (17) and the bottom surface of the tertiary pressure plate (16) are connected by a third spring (110).

3. The integrated graded stamping die for a speaker basket according to claim 2, characterized in that: The first spring (18) is multiple and symmetrically arranged on both sides of the secondary pressure plate (15), the second spring (19) is multiple and symmetrically arranged on both sides of the tertiary pressure plate (16), and the third spring (110) is multiple and arranged in the middle and below the tertiary pressure plate (16).

4. The integrated graded stamping die for a speaker basket according to claim 2, characterized in that: Multiple sleeves (112) are fixed to the edge of the main pressure plate (11). A stepped hole (113) is formed on the sleeve (112) that penetrates the main pressure plate (11). A stepped tie rod (114) is sleeved in the stepped hole (113). The lower end of the stepped tie rod (114) is fixedly connected to the auxiliary pressure plate (12).

5. The integrated graded stamping die for a speaker basket according to claim 1, characterized in that: The mold base (22) has a waste cavity (25) that communicates with the waist-shaped mold hole (23) and the circular mold hole (24), and the bottom of the waste cavity (25) has an outlet (26).

6. The integrated graded stamping die for a speaker basket according to claim 5, characterized in that: The outlet (26) is located on the front side; The bottom of the waste chamber (25) is provided with a slope (27), and the lower end of the slope (27) extends to the outlet (26).

7. The integrated graded stamping die for a speaker basket according to claim 1, characterized in that: Guide columns (28) are fixed on the base plate (21); A guide sleeve (115) is fixed on the main pressure plate (11).

8. The integrated graded stamping die for a speaker basket according to claim 1, characterized in that: The upper end of the waist-shaped die hole (23) is formed with a flared groove (29).

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