Slotted lining forming device

Abstract

The utility model discloses a slotted lining forming device, and belongs to the technical field of slotted lining production. The slotted lining forming device comprises a rack, a driving mechanism, a clamping piece, a forming block and a cutting knife, wherein the driving mechanism, the clamping piece, the forming block and the cutting knife are arranged on the same side of the rack; the rack comprises a working face, and the strip penetrates through the driving mechanism along the working face and is clamped through the clamping piece. The clamping piece is provided with a forming groove; the forming block and the cutting knife are in sliding fit with the rack, the forming block is close to the forming groove after sliding and abuts against the end of the strip, the forming block is used for hollow rolling forming of the strip in the forming groove, the cutting knife cuts the rolled strip along the clamping piece after sliding, and the slotted lining is formed. After the clamping piece clamps the strip, the strip is formed and cut at the position of the clamping piece, the strip does not need to be driven by a driving mechanism to move back and forth, the probability that the surface of the strip is damaged due to back-and-forth friction is avoided, and the situation that position errors are increased due to back-and-forth movement, and the forming quality of the slotted lining is reduced can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of slit bushing production, in particular to a slit bushing forming device. Background Art

[0002] The cold extrusion strengthening technology for slotted bushings features large interference, strong operability, and high extrusion quality. It can significantly improve the fatigue life of structural component fastening holes while also effectively enhancing their resistance to stress corrosion and corrosion fatigue. It has been widely used in aircraft fastening hole strengthening with excellent results. Slotted bushings are a key component in this cold extrusion strengthening technology. During the cold extrusion strengthening process, the use of slotted bushings avoids damage to the hole during extrusion and accumulation of material at the extrusion port, reduces the tensile force on the extrusion mandrel, and efficiently transfers radial extrusion deformation to the hole wall, ensuring tangential residual compressive stress within the hole. Therefore, the slotted bushing is a key factor in ensuring the effectiveness and quality of its cold extrusion strengthening.

[0003] At present, slit bushings are usually formed by auxiliary rolling with a core rod, or by automatic guide forming without a core rod. In the continuous production process of slit bushings, multiple functional mechanisms are set on the same frame to realize the production of slit bushings in multiple processes on the same frame. For example, Chinese patent CN114535411A discloses a slit bushing manufacturing device and method, which uses a pressing block, a lower cutter, an upper cutter, and a forming pressing block to act on the strip in a certain order, so that the strip is rolled on a rigid core rod. After the strip is rolled on the rigid core rod, it is cut to form a slit bushing. However, due to the existence of multiple processes, the strip needs to move back and forth for knife alignment and to adapt to subsequent processes. The back and forth friction of the strip during transportation will increase the probability of damage to the strip surface, and the back and forth movement will increase the position error, thereby reducing the forming quality of the slit bushing. Utility Model Content

[0004] The purpose of the utility model is to provide a slotted bushing forming device to solve the problem that in the existing production process of the slotted bushing, the back and forth movement of the strip easily causes damage to the strip and affects the forming quality of the strip.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A slotted bushing forming device comprises: a frame, a driving mechanism, a clamping member, a forming block and a cutting knife arranged on the same side of the frame;

[0007] The frame includes a working surface, along which the strip passes through the driving mechanism and is clamped by a clamping member; the clamping member is provided with a forming groove; the forming block and the cutting knife respectively slide with the frame, and after the forming block slides, it approaches the forming groove and abuts against the end of the strip, so as to be hollow rolled and formed in the forming groove, and after the cutting knife slides, it cuts the rolled and formed strip along the clamping member to form a slit bushing.

[0008] Furthermore, the forming block and the cutting knife are respectively located on both sides of the working surface, and the forming block and the forming groove are located on the same side of the working surface.

[0009] Furthermore, the forming block is provided with a guide surface, and after the forming block slides, the guide surface approaches the forming groove and abuts against the end of the strip.

[0010] Furthermore, the sliding direction of the cutting blade is perpendicular to the working surface.

[0011] Furthermore, the above-mentioned clamping member is rectangular and includes a feed end and a discharge end. The feed end is close to the driving mechanism. The clamping member is provided with a strip hole along its extension direction, whose cross-section matches the cross-section of the strip, so that the strip is clamped in the strip hole and the strip slides with the strip hole; the forming groove is located at the discharge end of the clamping member and on one side of the strip hole; the blade of the cutting knife slides along the discharge end to cut the rolled strip.

[0012] Furthermore, the above-mentioned clamping member includes a first clamping block and a second clamping block respectively slidably arranged on both sides of the working surface; the first clamping block and the forming block are located on the same side of the working surface, and the forming groove is formed on the first clamping block; the first clamping block and the second clamping block clamp the strip after sliding.

[0013] Furthermore, the first clamping block and the second clamping block are respectively provided with a first side surface and a second side surface on the side away from the driving mechanism. After the first clamping block and the second clamping block clamp the strip, the first side surface and the second side surface are coplanar, and the blade of the cutting knife slides and cuts the rolled strip along the first side surface and the second side surface.

[0014] Furthermore, the sliding directions of the first clamping block and the second clamping block are both inclined to the working surface, and the first clamping block and the second clamping block are arranged relative to the working surface.

[0015] The utility model has the following beneficial effects:

[0016] (1) After the clamping member of the present invention clamps the strip, the strip is formed and cut at the clamping member position. The strip does not need to be moved back and forth by the driving mechanism, which avoids the back-and-forth friction that increases the chance of damage to the strip surface. It can also avoid the position error caused by the back-and-forth movement, thereby reducing the forming quality of the slit bushing.

[0017] (2) The slotted bushing forming device of the present invention does not require the strip to move back and forth to adapt to subsequent processes, so the process is reduced, thereby greatly improving the production efficiency of the slotted bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the slotted bushing forming device of Example 1;

[0019] Figure 2 This is a schematic structural diagram of the clamping member of Example 1;

[0020] Figure 3 This is a schematic diagram of the structure of the slit bushing forming device clamping the strip in Example 1;

[0021] Figure 4 Schematic diagram of the structure of the slit bushing forming device of Example 1 when rolling the slit bushing;

[0022] Figure 5 Schematic diagram of the structure of the slotted bushing forming device of Example 2;

[0023] Figure 6 This is a schematic structural diagram of the clamping member of Example 2;

[0024] Figure 7 This is a schematic structural diagram of the slit bushing forming device clamping the strip in Example 2;

[0025] Figure 8 This is a schematic structural diagram of the slit bushing forming device of Example 2 when rolling the slit bushing.

[0026] In the figure: 10-frame; 11-working surface; 20-driving mechanism; 30-clamping member; 31-forming groove; 32-first clamping block; 33-second clamping block; 34-first side surface; 35-second side surface; 36-strip hole; 40-forming block; 41-guide surface; 50-cutting knife; 60-strip. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] Example 1:

[0029] Please refer to Figures 1 to 4This embodiment provides a slotted bushing forming device, comprising: a frame 10, a drive mechanism 20, a clamping member 30, a forming block 40, and a cutting blade 50, all disposed on the same side of the frame 10. The frame 10 includes a transversely disposed working surface 11, and a strip 60 moves along the same side of the frame 10 along the working surface 11 until a slotted bushing is formed. The drive mechanism 20, the clamping member 30, the forming block 40, and the cutting blade 50 are all disposed near the working surface 11 and are respectively used to drive the strip 60, clamp the strip 60, form the strip 60, and cut the strip 60.

[0030] Since one side of the strip 60 is coated, when the strip 60 is rolled into shape, the coated side of the strip 60 is rolled inside, that is, the inner side of the formed slit liner is coated.

[0031] The driving mechanism 20 adopts an existing driving method that can drive the strip 60 to move, such as a roller conveyor mechanism, which drives the strip 60 to move by rotating multiple pairs of rollers. The specific structure belongs to the existing technology and will not be repeated here.

[0032] In this embodiment, the clamping member 30 is rectangular and includes a feed end and a discharge end. The feed end is adjacent to the drive mechanism 20, while the discharge end is perpendicular to the work surface 11. The clamping member 30 is provided with a strip-shaped hole 36 along its extension direction. The cross-section of the strip-shaped hole 36 matches the cross-section of the strip 60, so that the strip 60 is clamped in the strip-shaped hole 36 and slides with the strip-shaped hole 36. That is, when the strip 60 is in the strip-shaped hole 36, the strip 60 will not swing or move in the extension direction due to the restraining action of the drive mechanism 20.

[0033] The discharge end of the clamp 30 is provided with an arcuate forming groove 31. This groove 31 is located below the strip-shaped hole 36, allowing the strip 60 to be bent downward and rolled into shape. Obviously, the groove 31 can also be located above the strip-shaped hole 36, allowing the strip 60 to be bent upward and rolled into shape. The groove 31 can be semicircular or arc-shaped, or extend to the bottom of the clamp 30, etc., so that the slit bushing formed after cutting can automatically fall out.

[0034] The forming block 40 is slidably mounted on the frame 10 and is located on the same side of the working surface 11 as the forming groove 31. That is, in this embodiment, the forming block 40 is located below the working surface 11. The forming block 40 is provided with a guide surface 41. After the forming block 40 slides, the guide surface 41 approaches the forming groove 31 and abuts against the end of the strip 60. When the strip 60 moves under the action of the drive mechanism 20, it is bent downward by the guide surface 41 and hollow-rolled into a cylindrical shape within the forming groove 31.

[0035] The cutting blade 50 is slidably mounted on the frame 10 and is located on either side of the working surface 11 along with the forming groove 31. In this embodiment, the cutting blade 50 is located above the working surface 11. The sliding direction of the cutting blade 50 is perpendicular to the working surface 11. After the cutting blade 50 slides, its blade cuts the cylindrical strip 60 along the discharge end to produce a slit bushing.

[0036] In this embodiment, the forming block 40 and the cutting knife 50 are respectively slidably matched with the frame 10 through a sliding mechanism. The sliding mechanism adopts an existing slider and slide groove matching mechanism. Each component is installed on the slider, and the slide groove is set on the frame 10. The driving mode of the sliding mechanism can be motor drive, hydraulic drive, etc.

[0037] The process of producing a slit bushing by the slit bushing forming device of this embodiment is as follows:

[0038] (1) The driving mechanism 20 drives the strip 60 to move forward, so that the strip 60 passes through the forming block 40 and moves to the discharge end of the forming block 40. The discharge end of the forming block 40 is the starting position for rolling;

[0039] (2) The forming block 40 slides so that the guide surface 41 approaches the forming groove 31;

[0040] (3) The driving mechanism 20 continues to drive the strip 60 forward, and the end of the strip 60 is released from the guide surface 41, bends downward, and is wound into a cylindrical shape in the forming groove 31;

[0041] (4) The forming block 40 slides in the opposite direction, and at the same time, the cutting knife 50 slides downward, and the blade of the cutting knife 50 shears the strip 60 along the discharge end of the forming block 40 to form a slit bushing;

[0042] (5) Repeat steps (3) and (4) to achieve continuous production of slit bushings.

[0043] Example 2:

[0044] Please refer to Figures 5 to 8 The difference between this embodiment and the first embodiment lies in the different clamping members 30. In this embodiment, the clamping members 30 include a first clamping block 32 and a second clamping block 33, each slidably disposed on the frame 10. The first clamping block 32 and the second clamping block 33 are disposed on opposite sides of the working surface 11. Due to the interference of the cutting blade 50, the sliding directions of the first clamping block 32 and the second clamping block 33 are both inclined with respect to the working surface 11. The first clamping block 32 and the second clamping block 33 slide synchronously to clamp the strip 60 at the working surface 11.

[0045] In this embodiment, the first clamping block 32 and the forming block 40 are located on the same side of the working surface 11. At this time, the forming groove 31 is formed on the first clamping block 32. Specifically, the forming groove 31 is close to the first clamping block 32 for clamping the end face of the strip 60. The structure of the forming groove 31 can be semicircular, arc-shaped or other shapes, so that the slit bushing formed after cutting can fall off automatically.

[0046] The first clamping block 32 and the second clamping block 33 are respectively provided with a first side surface 34 and a second side surface 35 perpendicular to the working surface 11 on the side away from the driving mechanism 20. After the first clamping block 32 and the second clamping block 33 clamp the strip 60, the first side surface 34 and the second side surface 35 are coplanar, and the blade of the cutting knife 50 cuts the rolled strip 60 along the first side surface 34 and the second side surface 35 after sliding.

[0047] In this embodiment, the first clamping block 32 and the second clamping block 33 are respectively slidably matched with the frame 10 through a sliding mechanism. The sliding mechanism adopts an existing slider and slide groove matching mechanism. Each component is installed on the slider, and the slide groove is set on the frame 10. The driving method of the sliding mechanism can be motor drive, hydraulic drive, etc.

[0048] The process of producing a slit bushing by the slit bushing forming device of this embodiment is as follows:

[0049] (1) The driving mechanism 20 drives the strip 60 to move forward to the coiling starting position;

[0050] (2) The first clamping block 32 and the second clamping block 33 slide synchronously to clamp the strip 60. At this time, the position of the first side surface 34 and the second side surface 35 is the starting position of rolling;

[0051] (3) The forming block 40 slides so that the guide surface 41 approaches the forming groove 31;

[0052] (4) The driving mechanism 20 continues to drive the strip 60 forward, and the end of the strip 60 is released from the guide surface 41, bends downward, and is wound into a cylindrical shape in the forming groove 31;

[0053] (5) The forming block 40 slides in the opposite direction, and at the same time, the cutting knife 50 slides downward, and the blade of the cutting knife 50 shears the strip 60 along the discharge end of the forming block 40 to form a slit bushing;

[0054] (6) Repeat steps (3) to (5) to achieve continuous production of slit bushings.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A slotted bushing forming device, characterized in that: include: A frame (10), a driving mechanism (20), a clamping member (30), a forming block (40), and a cutting knife (50) arranged on the same side of the frame (10); The frame (10) includes a working surface (11), and the strip passes through the driving mechanism (20) along the working surface (11) and is clamped by the clamping member (30); the clamping member (30) is provided with a forming groove (31); the forming block (40) and the cutting knife (50) are respectively slidably matched with the frame (10), and the forming block (40) slides close to the forming groove (31) and abuts against the end of the strip, so as to form the strip into a hollow roll in the forming groove (31); and the cutting knife (50) slides along the clamping member (30) to cut the rolled strip to form a slit bushing.

2. The slotted bushing forming device according to claim 1, characterized in that: The forming block (40) and the cutting knife (50) are respectively located on both sides of the working surface (11), and the forming block (40) and the forming groove (31) are located on the same side of the working surface (11).

3. The slotted bushing forming device according to claim 2, characterized in that: The forming block (40) is provided with a guide surface (41). After the forming block (40) slides, the guide surface (41) approaches the forming groove (31) and abuts against the end of the strip.

4. The slotted bushing forming device according to claim 1, characterized in that: The sliding direction of the cutting blade (50) is perpendicular to the working surface (11).

5. The slotted bushing forming device according to any one of claims 1 to 4, characterized in that: The clamping member (30) is rectangular and includes a feed end and a discharge end. The feed end is close to the driving mechanism (20). The clamping member (30) is provided with a strip hole (36) along its extension direction, the cross section of which matches the cross section of the strip, so that the strip is clamped in the strip hole (36) and the strip slides with the strip hole (36). The forming groove (31) is located at the discharge end of the clamping member (30) and on one side of the strip hole (36). The blade of the cutting knife (50) slides along the discharge end to cut the rolled strip.

6. The slotted bushing forming device according to any one of claims 1 to 4, characterized in that: The clamping member (30) includes a first clamping block (32) and a second clamping block (33) which are respectively slidably arranged on both sides of the working surface (11); the first clamping block (32) and the forming block (40) are located on the same side of the working surface (11), and the forming groove (31) is formed on the first clamping block (32); the first clamping block (32) and the second clamping block (33) clamp the strip after sliding.

7. The slotted bushing forming device according to claim 6, characterized in that: The first clamping block (32) and the second clamping block (33) are respectively provided with a first side surface (34) and a second side surface (35) on the side away from the driving mechanism (20); after the first clamping block (32) and the second clamping block (33) clamp the strip, the first side surface (34) and the second side surface (35) are coplanar; and the blade of the cutting knife (50) slides along the first side surface (34) and the second side surface (35) to cut the rolled strip.

8. The slotted bushing forming device according to claim 7, characterized in that: The sliding directions of the first clamping block (32) and the second clamping block (33) are both inclined to the working surface (11), and the first clamping block (32) and the second clamping block (33) are arranged relative to the working surface (11).

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