Flanging die of slotted lining

Abstract

The invention discloses a flanging die for a slotted bushing, and belongs to the technical field of bushing processing, the flanging die comprises a forming die holder and a support assembly, the forming die holder is internally provided with a flanging die inner cavity and a support accommodating cavity; the supporting assembly comprises a supporting seat, a supporting pad and a supporting spring, the supporting seat comprises a base and an ejector rod, the ejector rod is sleeved with the supporting pad in a sliding mode, the portion, between the base and the supporting pad, of the ejector rod is sleeved with the supporting spring, and the supporting pad and the ejector rod are matched to form a positioning groove used for positioning the lower end of the slotted lining. The lining flanging die is simple in structure and convenient to operate, it is guaranteed that when a lining to be flanged is placed in an inner cavity of the flanging die, the lower end of the lining can be accurately placed in the positioning groove, the situation that the bottom of the lining deforms due to deviation is avoided, and the flanging quality of the lining is guaranteed; and the flanging processing of bushing products with different lengths can be realized only by replacing the ejector rod, so that the die cost is reduced, and the applicability of the die is enhanced.

Description

Technical Field

[0001] The present invention relates to a flanging die for a slotted bushing, belonging to the technical field of bushing processing. Background Art

[0002] A slotted bushing is a process part commonly used for fatigue strengthening of mounting holes on an aircraft, mainly processed by cold extrusion strengthening technology. It has characteristics such as a large interference amount, strong operability, and obvious extrusion effect, and can significantly improve the fatigue life of various material structural parts. Using a die to turn the hole edge or outer edge of a product into a vertical straight edge or a flared bevel edge is called flanging. Processing three-dimensional parts by the method of flanging has good rigidity, and the die used for flanging is called a flanging die.

[0003] One end of the slotted bushing has a small flange, which can play a role in stable support during the hole strengthening process, and is also convenient for installation and disassembly. The installation effect of the flanged bushing is shown in Figure 12 ... Flanging is a key process for slotted bushings. At present, the flanging processing of slotted bushings mainly uses a punching press in cooperation with a flanging die for stamping processing. Most of the existing flanging dies are of a fixed structure, that is, a die inner cavity adapted to the slotted bushing product is provided in the flanging die, and the slotted bushing to be flanged is placed in the die inner cavity, and the flanging of the end of the slotted bushing is realized by cooperating with stamping or pressing. This kind of flanging die needs to be completely matched with the specifications of the slotted bushing to be processed. Therefore, it is necessary to consider the outer diameter size and height size of the slotted bushing. Slotted bushings with the same outer diameter size may have various different height sizes. A single flanging die cannot be used for slotted bushings with different height size specifications. For slotted bushings with different heights, the corresponding flanging die needs to be replaced as a whole. The applicability is not strong and it is not conducive to actual use. The overall replacement of the flanging die will also increase the cost of the flanging die. Summary of the Invention

[0004] Aiming at the deficiencies existing in the prior art, the present invention provides a flanging die for a slotted bushing.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A flanging die for a slotted bushing includes a forming die base and a support assembly arranged in the forming die base. A flanging die inner cavity for bushing forming and a support accommodation cavity for accommodating the support assembly are provided in the forming die base, and the flanging die inner cavity is arranged above the support accommodation cavity; The support assembly includes a support seat, a support pad, and a support spring. The support seat includes a base and a top rod arranged on the base. The support pad is slidably sleeved on the top rod, the support spring is sleeved on the top rod between the base and the support pad, and a positioning groove for positioning the lower end of the bushing is formed by the cooperation between the support pad and the top rod.

[0006] The beneficial effects of the present invention are as follows: The upper end of the support spring acts on the support pad, and the lower end acts on the base. The ejector rod and the support pad cooperate to form a positioning groove for the positioning split bushing. When the bushing to be flanged is placed into the inner cavity of the flanging die, the lower end of the bushing can be accurately placed in this positioning groove, avoiding the situation of deviation and deformation of the bottom of the bushing. During the flanging and stamping process of the bushing to be flanged, the positioning is stable, ensuring the flanging quality of the bushing. For the case where bushing products of the same diameter have different length specifications, only by replacing the ejector rod of the flanging die, the positioning and subsequent flanging processing of bushing products with different lengths can be achieved, without the need to replace the die as a whole. The same die can be used to process bushing products of various different heights, reducing the die cost and enhancing the applicability of the die. The structure of the present invention is simple, the operation is convenient, the positioning of the lower end of the bushing is accurate and stable, avoiding the deviation of the bushing, ensuring the flanging quality of the bushing, and different length bushing products can be adapted only by replacing the ejector rod, without replacing the die as a whole, reducing the die cost and improving the applicability of the die.

[0007] On the basis of the above technical solutions, the present invention can be further improved as follows.

[0008] Further, a rod head is provided at the upper end of the ejector rod, a pad hole is provided on the support pad, a limiting shoulder for limiting the rod head is provided in the pad hole, and the diameter of the rod head is greater than the inner diameter of the limiting shoulder.

[0009] The beneficial effect of adopting the above further solution is that the upper end of the support spring acts on the support pad, and a positioning groove for positioning the bottom end of the bushing is formed by the cooperation between the support pad and the ejector rod. The rod head acts on the limiting shoulder, which can limit the highest position of the upward movement of the support pad. Further, the inner cavity of the flanging die includes a tapered hole and a cylindrical hole that are connected, and the tapered hole and the cylindrical hole are arranged in the forming die base from top to bottom in sequence.

[0010] The beneficial effect of adopting the above further solution is that the hole wall of the tapered hole is inclined to be the acting surface during the forming of the bushing, which is convenient for the flanging forming of the end of the bushing. The cylindrical hole can wrap and support the bushing, ensuring the quality of the bushing during stamping and reducing or even avoiding its deformation.

[0011] Further, the forming die base includes a middle section of the die base and a lower section of the die base, and the outer diameter of the lower section of the die base is smaller than the outer diameter of the middle section of the die base.

[0012] The beneficial effect of adopting the above further solution is that the lower part of the forming die base, that is, the lower section of the die base, adopts a small-diameter section structural design. A ring groove is formed between the lower section of the die base and the middle section of the die base, which can be clamped and matched with the rotating bayonet on the subsequent automatic flanging equipment, driving the rotation of the flanging die and ensuring the stability of the rotation and feeding of the bushing on the automatic bushing flanging equipment.

[0013] Further, the forming die base further includes an upper die base section, and the outer diameter of the upper die base section is smaller than that of the middle die base section.

[0014] The beneficial effect of adopting the above further solution is that the outer diameter of the upper die base section being smaller than that of the middle die base section can achieve the effect of weight reduction and prevent the flanging die from tipping during the rotation process.

[0015] Further, the support pad includes an upper pad body and a lower pad body, the outer diameter of the upper pad body is larger than that of the lower pad body, the base is provided with a seat groove, and the lower pad body can be placed in the seat groove when the support moves upward on the support base to eject the bushing.

[0016] The beneficial effect of adopting the above further solution is that the depth of the seat groove is greater than the height of the lower pad body. During the process of ejecting the bushing product, the base and the ejector rod move upward, the base compresses the support spring, the lower pad body can be completely placed in the seat groove, and the ejector rod smoothly ejects the bushing product.

[0017] Further, the ejector rod is connected to the base through a connecting mechanism.

[0018] The beneficial effect of adopting the above further solution is that the connection between the ejector rod and the base is realized through the connecting mechanism.

[0019] Further, the connecting mechanism includes a rod pin hole and a connecting pin rod that can be inserted into the rod pin hole. The base is provided with a positioning hole for installing the ejector rod, and the ejector rod and the base are correspondingly provided with the rod pin holes for the connecting pin rod to pass through.

[0020] The beneficial effect of adopting the above further solution is that the lower end of the ejector rod is placed in the positioning hole, the connecting pin rod is inserted into the rod pin hole on the base, and then inserted into the rod pin hole on the ejector rod until it passes through the rod pin hole on the other side of the base. The base and the ejector rod are connected through the connecting pin rod, which is convenient for installation. When facing bushing products of different lengths, the disassembly and replacement of the ejector rod are also very convenient, and the same flanging die can realize the flanging processing of bushing products of various different heights.

[0021] Further, the ejector rod and the base are in interference fit.

[0022] The beneficial effect of adopting the above further solution is that the outer diameter of the lower end of the ejector rod is larger than the diameter of the positioning hole on the base. The ejector rod is press-fitted onto the base, and the ejector rod and the base are in transition fit, ensuring the connection stability between the two, and also facilitating the disassembly and replacement of ejector rods of different heights in the future.

[0023] Further, it further includes an anti-detachment mechanism, and the base is arranged on the forming die base through the anti-detachment mechanism.

[0024] The beneficial effect of adopting the above further solution is that the support component is installed in the forming die base. Without an anti - detachment mechanism, when the flanging die is lifted, the support component will be separated from the forming die base, which is not convenient for the overall picking up, transferring and storing of the flanging die. The anti - detachment mechanism can associate the support component with the forming die base without affecting the use function of the flanging die. The support component can move relative to the forming die base but will not be separated from the forming die base, facilitating the overall picking up, transferring and storing of the flanging die.

[0025] Furthermore, the anti - detachment mechanism includes an anti - detachment keyway and an anti - detachment rod whose outer end can move up and down in the anti - detachment keyway. The anti - detachment keyway is arranged on the forming die base, and the inner end of the anti - detachment rod is connected to the base.

[0026] The beneficial effect of adopting the above further solution is that the inner end of the anti - detachment rod is inserted into the anti - detachment keyway and connected to the base located in the forming die base. The outside of the anti - detachment rod can move up and down in the anti - detachment keyway. By controlling the length of the anti - detachment keyway, the ejection height can be controlled to prevent excessive ejection and interference with the blanking mechanism of the flanging equipment. This not only meets the requirement that the support component will not be separated from the forming die base but also controls the up - and - down movement distance of the base and the ejector rod in the forming die base. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a three - dimensional structural diagram of the forming die base of the present invention; Figure 3 is a front - view structural diagram of the forming die base of the present invention; Figure 4 is Figure 3 the sectional view taken along the A - A direction in Figure 5 is a left - view structural diagram of the forming die base of the present invention; Figure 6 is Figure 5 the sectional view taken along the B - B direction in Figure 7 is a structural diagram of the forming die base of the present invention from another angle; Figure 8 is a structural diagram of the support component of the present invention; Figure 9 is a sectional structural diagram of the support component of the present invention; Figure 10 is a structural diagram of the support pad of the present invention; Figure 11 is a structural diagram of the support pad from another angle of the present invention; Figure 12 is a structural diagram of the use state of the slotted bushing; In the figure, 1 is a forming die base; 101 is a flanging die inner cavity; 1011 is a frustum-shaped hole; 1012 is a cylindrical hole; 102 is a support accommodation cavity; 103 is an anti-detachment keyway; 104 is the lower section of the die base; 105 is the upper section of the die base; 2 is a support assembly; 201 is a base; 2011 is a base groove; 202 is a ejector rod; 2021 is a rod head; 203 is a support spring; 204 is a support pad; 2041 is a pad hole; 2042 is a lower pad body; 205 is a positioning groove; 206 is a connecting pin rod; 3 is an anti-detachment rod; 4 is a bushing. Detailed implementation manners

[0028] The principles and features of the present invention will be described below in conjunction with examples. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0029] As Figures 1-11 shown, a flanging die for a slotted bushing includes a forming die base 1 and a support assembly 2 provided in the forming die base 1. The forming die base 1 is provided with a flanging die inner cavity 101 for forming the bushing 4 and a support accommodation cavity 102 for accommodating the support assembly 2. The flanging die inner cavity 101 is arranged above the support accommodation cavity 102. The support assembly 2 includes a support base, a support pad 204 and a support spring 203. The support base includes a base 201 and an ejector rod 202 provided on the base 201. The support pad 204 is slidably sleeved on the ejector rod 202. The support spring 203 is sleeved on the ejector rod 202 between the base 201 and the support pad 204. A positioning groove 205 for positioning the lower end of the bushing 4 is formed by the cooperation between the support pad 204 and the ejector rod 202.

[0030] The upper end of the ejector rod 202 is provided with a rod head 2021. The support pad 204 is provided with a pad hole 2041. A limiting shoulder for limiting the rod head 2021 is provided in the pad hole 2041. The diameter of the rod head 2021 is larger than the inner diameter of the limiting shoulder. The rod end of the ejector rod 202 passes through the pad hole 2041 and is connected to the base 201. The upper end of the support spring 203 acts on the support pad 204. A positioning groove 205 for positioning the bottom end of the bushing 4 is formed by the cooperation between the support pad 204 and the ejector rod 202. The rod head 2021 acts on the limiting shoulder, which can limit the highest position of the upward movement of the support pad 204. The flanging die inner cavity 101 includes a communicating frustum-shaped hole 1011 and a cylindrical hole 1012. The frustum-shaped hole 1011 and the cylindrical hole 1012 are sequentially arranged in the forming die base 1 from top to bottom. The hole wall of the frustum-shaped hole 1011 is inclined to be the acting surface during the forming of the bushing 4, which is convenient for the flanging forming of the end of the bushing 4. The cylindrical hole 1012 can wrap and support the bushing 4 to ensure the quality of the bushing 4 during stamping and reduce or even avoid its deformation.

[0031] The forming die base 1 includes a middle die base section and a lower die base section 104, and the outer diameter of the lower die base section 104 is smaller than that of the middle die base section. The lower part of the forming die base 1, i.e., the lower die base section 104, adopts a small-diameter section structure design. A ring groove is formed between the lower die base section 104 and the middle die base section, which can be properly fitted with a rotating bayonet on subsequent automatic flanging equipment to drive the turnover of the flanging die, ensuring the stability of the circumferential rotation and feeding of the bushing 4 on the automatic bushing flanging equipment, and making the flanging die more stable and reliable during the rotating feeding process.

[0032] The forming die base 1 further includes an upper die base section 105, and the outer diameter of the upper die base section 105 is smaller than that of the middle die base section. It is mainly used for weight reduction to prevent the flanging die from tipping during rotation.

[0033] The support pad 204 includes an upper pad body and a lower pad body 2042. The outer diameter of the upper pad body is larger than that of the lower pad body 2042. A seat groove 2011 is provided on the base 201, and the lower pad body 2042 can be placed in the seat groove 2011 when the base 201 and the ejector rod 202 move upward to eject the bushing 4. The depth of the seat groove 2011 is greater than the height of the lower pad body 2042. During the process of ejecting the bushing 4, the base 201 and the ejector rod 202 move upward, the base 201 compresses the support spring 203, the lower pad body 2042 can be completely placed in the seat groove 2011, and the upper surface of the base 201 can act on the bottom surface of the upper pad body without problems such as tilting, ensuring that the ejector rod 202 smoothly ejects the bushing 4 product.

[0034] The ejector rod 202 is connected to the base 201 through a connecting mechanism. The connection between the ejector rod 202 and the base 201 is realized through the connecting mechanism.

[0035] The connecting mechanism includes a rod pin hole and a connecting pin rod 206 that can be inserted into the rod pin hole. The base 201 is provided with a positioning hole for installing the ejector rod 202, and the ejector rod 202 and the base 201 are correspondingly provided with the rod pin holes for the connecting pin rod 206 to pass through. The lower end of the ejector rod 202 is placed in the positioning hole, and the connecting pin rod 206 is inserted into the rod pin hole on the base 201 and then inserted into the rod pin hole on the ejector rod 202 until it passes through the rod pin hole on the other side of the base 201. The base 201 and the ejector rod 202 are connected through the connecting pin rod 206, which is convenient for installation. When facing bushing 4 products of different lengths, the disassembly and replacement of the ejector rod 202 are also very convenient, and the same flanging die can realize the flanging processing of bushing 4 products of various different heights.

[0036] The ejector rod 202 is in interference fit with the base 201. The outer diameter of the lower end of the ejector rod 202 is larger than the aperture of the positioning hole on the base 201. The ejector rod 202 is press-fitted onto the base 201, and the ejector rod 202 and the base 201 are in transitional fit, ensuring the connection stability between the two, and also facilitating the disassembly, replacement of the ejector rod 202 with different heights in the subsequent process.

[0037] It further includes an anti-detachment mechanism, and the base 201 is arranged on the forming die base 1 through the anti-detachment mechanism. The support assembly 2 is installed in the forming die base 1. Without the anti-detachment mechanism, when the flanging die is lifted, the support assembly 2 will be detached from the forming die base 1, which is not convenient for the overall picking up, transferring and storing of the flanging die. The anti-detachment mechanism can associate the support assembly 2 with the forming die base 1 without affecting the use function of the flanging die. The support assembly 2 can move relative to the forming die base 1, but will not be detached from the forming die base 1, facilitating the overall picking up, transferring and storing of the flanging die.

[0038] The anti-detachment mechanism includes an anti-detachment keyway 103 and an anti-detachment rod 3 whose outer end can move up and down in the anti-detachment keyway 103. The anti-detachment keyway 103 is arranged on the forming die base 1, and the inner end of the anti-detachment rod 3 is connected to the base 201. The anti-detachment keyway 103 is a long strip through hole and is axially arranged on the forming die base 1. The inner end of the anti-detachment rod 3 is inserted into the anti-detachment keyway 103 and is connected to the base 201 located in the forming die base 1. The outer end of the anti-detachment rod 3 can move up and down in the anti-detachment keyway 103. By controlling the length of the anti-detachment keyway 103, the ejection height can be controlled to prevent excessive ejection and interfere with the blanking mechanism of the flanging equipment, which not only meets the requirement that the support assembly 2 will not be detached from the forming die base 1, but also controls the up and down movement distance of the base 201 and the ejector rod 202 in the forming die base 1.

[0039] One end of the anti-detachment rod 3 is threadedly connected to the base 201, and the other end moves in the anti-detachment keyway 103. After the support assembly 2 is installed in the support cavity 102 of the forming die base 1, the inner end of the anti-detachment rod 3 can be inserted from the side anti-detachment keyway 103 and is threadedly connected to the base 201, and the outer end can move up and down in the anti-detachment keyway 103 to prevent the support assembly 2 from being detached from the forming die base 1.

[0040] During use, install the flanging die. Specifically, install the support component 2 in the support receiving cavity 102 at the bottom of the forming die base 1, and install the anti-disengagement rod 3 from the anti-disengagement keyway 103 on the side of the forming die base 1. The rod end of the anti-disengagement rod 3 is threadedly connected to the base 201. The support component 2 and the forming die base 1 are associated through the anti-disengagement mechanism. The center of the forming die base 1 is coaxial with the support component 2. The anti-disengagement rod 3 can move up and down within the movable range of the anti-disengagement keyway 103. The base 201 and the ejector rod 202 can move up and down in the forming die base 1, so as to realize positioning and wrapping the bushing 4 to be flanged or ejecting the flanged bushing 4 product. The tapered hole 1011 in the inner cavity 101 of the flanging die has a certain inclination angle, which is the acting surface for the flanging of the bushing 4. The bushing 4 product can be formed by stamping up and down, realizing the flanging process of the bushing 4. After the processing is completed, the lifting cylinder of the bushing 4 flanging equipment can act on the support seat, jack up the support seat, the ejector rod 202 moves up, and the flanged bushing 4 moves up. The flanged bushing 4 can be detached from the forming die base 1, realizing the blanking of the flanged bushing 4. As the support seat is jacked up and moves up, the support pad 204 will be compressed by the forming die base 1 to compress the support spring 203, which will not prevent the blanking of the flanged bushing 4. After the blanking of the flanged bushing 4 is completed, the lifting cylinder of the bushing 4 flanging equipment resets, and the support seat resets under the action of the support spring 203. A positioning groove 205 is formed between the ejector rod 202 and the support pad 204, waiting for the next bushing 4 to be flanged, which is convenient for the flanging process of batch products of the bushing 4.

[0041] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flanging die for a slotted bushing, characterized in that, It includes a forming die base (1) and a support assembly (2) arranged inside the forming die base (1). An edge - turning die inner cavity (101) for forming a bushing (4) and a support accommodation cavity (102) for accommodating the support assembly (2) are provided inside the forming die base (1). The edge - turning die inner cavity (101) is arranged above the support accommodation cavity (102). The support assembly (2) includes a support base, a support pad (204) and a support spring (203). The support base includes a base (201) and a ejector rod (202) arranged on the base (201). The support pad (204) is slidably sleeved on the ejector rod (202). The support spring (203) is sleeved on the ejector rod (202) between the base (201) and the support pad (204). A positioning groove (205) for positioning the lower end of the bushing (4) is formed by the cooperation between the support pad (204) and the ejector rod (202).

2. The flanging die for the slotted bushing according to claim 1, wherein A rod head (2021) is provided at the upper end of the ejector rod (202). A pad hole (2041) is provided on the support pad (204). A limiting shoulder for limiting the rod head (2021) is arranged in the pad hole (2041). The diameter of the rod head (2021) is larger than the inner diameter of the limiting shoulder.

3. The flanging die for the slotted bushing according to claim 1, characterized in that, The edge - turning die inner cavity (101) includes a communicating frustum - shaped hole (1011) and a cylindrical hole (1012). The frustum - shaped hole (1011) and the cylindrical hole (1012) are arranged in the forming die base (1) in sequence from top to bottom.

4. The flanging die for the slotted bushing according to claim 1, characterized in that, The forming die base (1) includes a middle die base section and a lower die base section (104). The outer diameter of the lower die base section (104) is smaller than the outer diameter of the middle die base section.

5. The flanging die for the slotted bushing according to claim 4, characterized in that, The forming die base (1) further includes an upper die base section (105). The outer diameter of the upper die base section (105) is smaller than the outer diameter of the middle die base section.

6. The flanging die for the slotted bushing according to any one of claims 1-5, characterized in that, The support pad (204) includes an upper pad body and a lower pad body (2042). The outer diameter of the upper pad body is larger than the outer diameter of the lower pad body (2042). A seat groove (2011) is provided on the base (201). The lower pad body (2042) can be placed in the seat groove (2011) when the support base moves upward to eject the bushing (4).

7. The flanging die for the slotted bushing according to any one of claims 1-5, characterized in that The ejector rod (202) is connected to the base (201) through a connecting mechanism.

8. The flanging die for the slotted bushing according to claim 7, characterized in that, The connecting mechanism includes a rod pin hole and a connecting pin rod (206) that can be inserted into the rod pin hole. A positioning hole for installing the ejector rod (202) is provided on the base (201). The ejector rod (202) and the base (201) are correspondingly provided with the rod pin holes through which the connecting pin rod (206) passes.

9. The flanging die for the slotted bushing according to any one of claims 1-5, characterized in that It further includes an anti - detachment mechanism. The base (201) is arranged on the forming die base (1) through the anti - detachment mechanism.

10. The flanging die for the slotted bushing according to claim 9, characterized in that, The anti - detachment mechanism includes an anti - detachment keyway (103) and an anti - detachment rod (3) whose outer end can move up and down in the anti - detachment keyway (103). The anti - detachment keyway (103) is arranged on the forming die base (1). The inner end of the anti - detachment rod (3) is connected to the base (201).

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