Filter cartridge end cover and pressing rivet die for producing filter cartridge end cover

Abstract

The utility model discloses a filter cartridge end cover and a press riveting die used for producing the filter cartridge end cover, an inner cartridge cover and an outer cartridge cover in the filter cartridge end cover are riveted together, the press riveting die used for producing the filter cartridge end cover comprises an upper die base and a lower die base, a mounting base is arranged on the bottom wall of the upper die base, and the mounting base is connected with the lower die base. A nitrogen spring is arranged between the upper die base and the installation base, a plurality of equal-height bolts are evenly distributed in the installation base in the circumferential direction, receding holes aligned with the equal-height bolts are formed in the upper die base, a plurality of riveting punches are evenly distributed in the installation base in the circumferential direction, a piston rod of the nitrogen spring is connected with a positioning plate, and the positioning plate is connected with the equal-height bolts. Guide holes matched with the riveting punches in a one-to-one correspondence mode are evenly distributed in the circumference of the positioning plate, an inner positioning block and a lower die ring are concentrically arranged on the top wall of the lower die base, and positioning holes corresponding to the guide holes in a one-to-one correspondence mode are evenly distributed in the circumference of the top wall of the lower die ring. The integral quality and the production efficiency of the filter cartridge end cover can be improved.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a filter cartridge end cover and a riveting mold for producing the filter cartridge end cover. Background Art

[0002] When producing filter elements, filter cartridge end caps are required for fixing. However, the filter cartridge end caps currently on the market are Figure 1 As shown, it includes: an outer cylinder cover 1 and an inner cylinder cover 2, an outer ring plate 11 and an inner ring plate 12 are provided on the outer cylinder cover 1, and an inner second ring plate 21 is provided on the inner cylinder cover 2. The inner cylinder cover 2 is overlapped on the outer cylinder cover 1 and welded together by pressure welding. In this way, when the filter cartridge end cover is installed on the filter element, the inner first ring plate 12 and the inner second ring plate 21 cooperate to clamp on the filter element, and the outer ring plate 11 and the inner first ring plate 12 cooperate to clamp on the equipment. However, pressure welding has high welding requirements for workers. If the applied pressure is too large, irregular stress deformation is likely to occur between the outer cylinder cover 1 and the inner cylinder cover 2 in the filter cartridge end cover, which will cause a gap between the outer cylinder cover 1 and the inner cylinder cover 2 and cause it to be scrapped. If the applied pressure is too small, the outer cylinder cover 1 and the inner cylinder cover 2 in the filter cartridge end cover are likely to become unsoldered during use due to insufficient welding strength. In addition, pressure welding requires a long welding time, which will lead to low work efficiency and limit production speed. Utility Model Content

[0003] The utility model aims to provide a riveting die for producing filter cartridge end covers, which can ensure the quality of the filter cartridge end covers and improve the production speed.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: the filter cartridge end cover includes: an outer cylinder cover and an inner cylinder cover, an outer ring plate and an inner ring plate are provided on the outer cylinder cover, and an inner second ring plate is provided on the inner cylinder cover, and the inner cylinder cover is attached to the outer cylinder cover and riveted together.

[0005] The riveting die for producing filter cartridge end covers is suitable for the above-mentioned filter cartridge end covers, comprising: an upper die base and a lower die base, a mounting seat is provided on the bottom wall of the upper die base, a nitrogen spring is provided between the upper die base and the mounting seat, a number of equal-height bolts that can move up and down are evenly distributed on the circumference of the mounting seat, a clearance hole aligned with the equal-height bolts is provided on the upper die base, a number of rivet punches are evenly distributed on the circumference of the mounting seat, the rivet punches extend downward from the mounting seat, a positioning plate is connected to the piston rod of the nitrogen spring, the positioning plate is connected to the equal-height bolts, guide holes that correspond to the rivet punches are evenly distributed on the circumference of the positioning plate, an inner positioning block and a lower die ring are concentrically provided on the top wall of the lower die base, positioning holes that correspond to the guide holes are evenly distributed on the circumference of the top wall of the lower die ring, a number of guide rods are evenly distributed on the circumference of the lower die base, a number of guide sleeves are evenly distributed on the circumference of the upper die base, and the guide rods are slidably passed through the corresponding guide sleeves.

[0006] Furthermore, in the aforementioned riveting die for producing filter cartridge end covers, the connection structure between the nitrogen spring, the mounting seat and the upper die seat is as follows: a mounting groove is provided on the bottom wall of the upper die seat, a first T-shaped hole is provided on the mounting seat, the nitrogen spring is fixed in the first T-shaped hole and is upwardly higher than the mounting seat. When the mounting seat is fixed on the upper die seat, the nitrogen spring is stuck in the mounting groove, and the piston rod of the nitrogen spring passes through the mounting seat and is connected to the positioning plate.

[0007] Furthermore, the aforementioned riveting die for producing the filter cartridge end cover, wherein the connection structure between the riveting punch and the mounting seat is: the mounting seat includes: a pad and a clamping plate, a second T-shaped hole is opened on the clamping plate, a boss is provided on the riveting punch, the riveting punch is clamped in the second T-shaped hole, the boss on the riveting punch rests in the second T-shaped hole and is flush with the clamping plate, when the pad and the clamping plate are aligned and fixed, the pad rests on the boss of the riveting punch, a straight hole section is provided on the pad, and a T-shaped hole section is provided on the clamping plate, the inner diameter of the straight hole section is the same as the inner diameter of the large diameter end of the T-shaped hole section, and the straight hole section and the T-shaped hole section are spliced ​​to form a first T-shaped hole.

[0008] Furthermore, the aforementioned riveting die for producing the filter cartridge end cover is provided with a reduced diameter impact end on the riveting punch, the reduced diameter impact end is connected to the riveting punch through a conical section, and a reduced diameter limiting section is provided in the guide hole, the reduced diameter limiting section cooperates with the reduced diameter impact end.

[0009] Furthermore, the aforementioned riveting die for producing the filter cartridge end cover is provided with a conical guide wall on the inner positioning block.

[0010] The advantages of the present invention are that: by using the riveting die for producing the filter cartridge end cover described in the present invention, irregular stress deformation of the inner cylinder cover and the outer cylinder cover in the filter cartridge end cover can be prevented during riveting, thereby ensuring the sealing between the inner cylinder cover and the outer cylinder cover; and because the inner cylinder cover and the outer cylinder cover can be instantly deformed after being pressurized to form a riveting force on the inner cylinder cover and the outer cylinder cover, the processing efficiency is high and the production efficiency can be improved; the inner cylinder cover and the outer cylinder cover are connected by the riveting force to ensure the connection strength between the two, thereby ensuring the overall strength of the filter cartridge end cover; an inner positioning block and a lower die ring are concentrically arranged on the lower die seat, so that the outer cylinder cover and the inner cylinder cover in the filter cartridge end cover can be concentrically overlapped together; a nitrogen spring is arranged between the upper die seat and the mounting seat, and a positioning plate is connected to the nitrogen spring, which can limit the overlapped inner cylinder cover and the outer cylinder cover on the lower die ring before riveting, thereby preventing the outer cylinder cover and the inner cylinder cover from deflecting during riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the connection structure between the outer cylinder cover and the inner cylinder cover in the original filter cartridge end cover.

[0012] Figure 2 It is a structural schematic diagram of a riveting die for producing filter cartridge end covers according to the present invention.

[0013] Figure 3 The utility model is a structural schematic diagram of a riveting die for producing a filter cartridge end cover when riveting the filter cartridge end cover.

[0014] Figure 4 The utility model is a schematic structural diagram of a filter cartridge end cover riveted out by using the riveting die for producing the filter cartridge end cover. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0016] like Figures 2 to 4 As shown, the riveting die for producing the end cover of the filter cartridge described in the present invention comprises: an upper die base 3 and a lower die base 4, a mounting seat 5 is provided on the bottom wall of the upper die base 3, and the mounting seat 5 comprises: a pad 51 and a clamping plate 52, the pad 51 is connected to the upper die base 3, and the clamping plate 52 is connected to the pad 51, a straight hole section is provided at the center position of the pad 51, and a T-shaped hole section is provided at the center position of the clamping plate 52, the inner diameter of the straight hole section is the same as the inner diameter of the large diameter end of the T-shaped hole section, when the clamping plate 52 is connected to the pad 51, the straight hole section and the T-shaped hole section are spliced ​​to form a first T-shaped hole, and a nitrogen spring 6 is clamped in the first T-shaped hole, the upper end of the nitrogen spring 6 extends upward from the pad 51, and a mounting groove is provided on the bottom wall of the upper die base 3, the upper end of the nitrogen spring 6 is clamped in the mounting groove, and the piston rod in the nitrogen spring 6 passes downward through the clamping plate The plate 52 has a plurality of equal-height bolts 53 that can move up and down, and a plurality of second T-shaped holes are evenly distributed on the circumference of the splint 52. The second T-shaped hole is fixed with a riveting punch 7. The riveting punch 7 extends downward from the splint 52. The boss on the riveting punch 7 rests on the second T-shaped hole and is flush with the splint 52. When the pad 51 and the splint 52 are aligned and fixed, the pad 51 rests on the boss of the riveting punch 7 to fix the riveting punch 7. A positioning plate 8 is connected to the piston rod of the nitrogen spring 6. The positioning plate 8 is connected to the equal-height bolts 53. Under the action of the equal-height bolts 53, the positioning plate 8 can maintain a horizontal state. The positioning plate 8 has guide holes 81 that correspond one-to-one with the riveting punches 7 and are evenly distributed on the circumference.

[0017] An inner positioning block 41 and a lower die ring 42 are concentrically arranged on the top wall of the lower die base 4, a tapered guide wall is provided on the inner positioning block 41, and positioning holes 43 corresponding to the guide holes 81 are evenly distributed on the circumference of the top wall of the lower die ring 42. The middle part of the bottom wall of the positioning hole 43 protrudes upward, a number of guide rods 44 are evenly distributed on the circumference of the lower die base 4, and a number of guide sleeves 32 are evenly distributed on the circumference of the upper die base 3. The guide rods 44 are slidably inserted into the corresponding guide sleeves 32.

[0018] Before riveting, fix the lower die base 4 on the platform of the riveting machine, fix the upper die base 3 on the punch of the riveting machine, and then insert the guide rod 44 on the lower die base 4 into the guide sleeve 32 of the upper die base 3, clamp the outer cylinder cover 1 on the lower die ring 42, and the outer ring plate 11 and the inner ring plate 12 on the outer cylinder cover 1 are matched and clamped on the lower die ring 42, and then the inner cylinder cover 2 is sleeved on the inner positioning block 41, and overlapped on the outer cylinder cover 1 at the same time. Under the concentric positioning of the inner positioning block 41 and the lower die ring 42, the inner cylinder cover 2 and the outer cylinder cover 1 can be ensured to be concentrically overlapped. Under the guidance of the tapered guide wall of the inner positioning block 41, the inner cylinder cover 2 is conveniently sleeved on the inner positioning block 41 to prevent the inner cylinder cover from being scratched. 2. First, the nitrogen spring 6 drives the positioning plate 8 to press downward against the inner cylinder cover 2 of the filter cartridge end cover. Under the cooperation of the positioning plate 8 and the lower die ring 42, the inner cylinder cover 2 and the outer cylinder cover 1 on the filter cartridge end cover are pressed together. After the positioning plate 8 sets the inner cylinder cover 2 and the outer cylinder cover 1 on the filter cartridge end cover, the riveting machine is started. The punch on the riveting machine drives the upper die seat 3 and the mounting seat 5 to move downward together, and the riveting punch 7 extends into the guide hole 81. The guide hole 81 guides the riveting punch 7. When the upper die seat 3 descends, the equal height bolts 53 move in their corresponding makeshift holes 31 to prevent interference, and the nitrogen spring 6 will move downward after being squeezed. The positioning plate 8 is reset in the direction, which not only continuously applies positioning pressure to the positioning plate 8, but also avoids interference with the movement of the upper die base 3 and the mounting base 5. The riveting punch 7 punches the inner cylinder cover 2 and the outer cylinder cover 1 located just above the positioning hole 43. The punched inner cylinder cover 2 and the outer cylinder cover 1 will extend into the positioning hole 43. Since there is a convex portion in the positioning hole 43, the inner cylinder cover 2 will first contact the convex portion when it pushes the outer cylinder cover 1 downward. After the riveting punch 7 continues to apply the punching pressure, the inner cylinder cover 2 and the outer cylinder cover 1 will be squeezed and deformed in the positioning hole 43 under the restriction of the convex portion. The surrounding area of ​​the positioning hole 43 is concave, and the outer cylinder cover 1 and the inner cylinder cover 2 are concave. The squeezed part will extend downward to the depression of the positioning hole 43 to prevent the inner cylinder cover 2 and the outer cylinder cover 1 from being stuck in the positioning hole 43 due to expansion when being riveted. The inner cylinder cover 2 and the outer cylinder cover 1 will be riveted together under the action of the punching force to form a complete filter cartridge end cover. After the riveting is completed, the punch on the riveting machine drives the upper die seat 3 and the mounting seat 5 to rise, and the riveting punch 7 will move upward away from the riveted filter cartridge end cover. Since the nitrogen spring 6 has been reset, the nitrogen spring 6 will rise with the mounting seat 5 and will bring the positioning plate 8 up and away from the filter cartridge end cover. The staff can then remove the riveted filter cartridge end cover from the lower die ring 42 and the inner positioning block 41. During riveting, the inner cylinder cover 2 and the outer cylinder cover 1 in the filter cartridge end cover are subjected to tensile force, which will not affect the sealing between the inner cylinder cover 2 and the outer cylinder cover 1. Moreover, since the inner cylinder cover 2 and the outer cylinder cover 1 can be deformed instantly after being compressed to form a riveting force on the inner cylinder cover 2 and the outer cylinder cover 1, the processing efficiency is high and the production efficiency can be improved. The riveting force connection between the inner cylinder cover 2 and the outer cylinder cover 1 can ensure the connection strength between the two, thereby ensuring the strength of the filter cartridge end cover.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. Filter cartridge end cap, characterized by: include: The outer cylinder cover and the inner cylinder cover are provided with an outer ring plate and an inner ring plate on the outer cylinder cover, and the inner cylinder cover is provided with an inner second ring plate. The inner cylinder cover is attached to the outer cylinder cover and riveted together.

2. A riveting die for producing the filter cartridge end cap of claim 1, characterized in that: The filter cartridge end cover is suitable for the filter cartridge end cover described in claim 1, comprising: an upper mold base and a lower mold base, characterized in that: a mounting seat is provided on the bottom wall of the upper mold base, a nitrogen spring is provided between the upper mold base and the mounting seat, a plurality of equal-height bolts that can move up and down are evenly distributed on the circumference of the mounting seat, a plurality of rivet punches are evenly distributed on the circumference of the mounting seat, the rivet punches extend downwardly from the mounting seat, a positioning plate is connected to the piston rod of the nitrogen spring, the positioning plate is connected to the equal-height bolts, guide holes that correspond to the rivet punches are evenly distributed on the circumference of the positioning plate, an inner positioning block and a lower mold ring are concentrically provided on the top wall of the lower mold base, positioning holes that correspond to the guide holes are evenly distributed on the circumference of the top wall of the lower mold ring, a plurality of guide rods are evenly distributed on the circumference of the lower mold base, and a plurality of guide sleeves are evenly distributed on the circumference of the upper mold base, and the guide rods are slidably passed through the corresponding guide sleeves.

3. The riveting die for producing filter cartridge end caps according to claim 2, characterized in that: The connection structure between the nitrogen spring, the mounting seat and the upper die seat is as follows: a mounting groove is provided on the bottom wall of the upper die seat, and a first T-shaped hole is provided on the mounting seat. The nitrogen spring is fixed in the first T-shaped hole and is higher than the mounting seat. When the mounting seat is fixed on the upper die seat, the nitrogen spring is stuck in the mounting groove, and the piston rod of the nitrogen spring passes through the mounting seat and is connected to the positioning plate.

4. The riveting die for producing filter cartridge end caps according to claim 3, characterized in that: The connection structure between the riveting punch and the mounting seat is as follows: the mounting seat includes: a pad and a clamping plate, a second T-shaped hole is opened on the clamping plate, a boss is provided on the riveting punch, the riveting punch is clamped in the second T-shaped hole, the boss on the riveting punch rests in the second T-shaped hole and is flush with the clamping plate, when the pad and the clamping plate are aligned and fixed, the pad rests on the boss of the riveting punch, a straight hole section is provided on the pad, and a T-shaped hole section is provided on the clamping plate, the inner diameter of the straight hole section is the same as the inner diameter of the large diameter end of the T-shaped hole section, and the straight hole section and the T-shaped hole section are spliced ​​to form a first T-shaped hole.

5. The riveting die for producing filter cartridge end caps according to claim 4, characterized in that: The middle portion of the bottom wall of the positioning hole is convex upward.

6. The riveting die for producing filter cartridge end caps according to claim 2, characterized in that: A cone guide wall is provided on the inner positioning block.

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