Straight cylinder type slotted lining manufacturing device

Abstract

The utility model discloses a straight cylinder type slotted bushing manufacturing device, which belongs to the technical field of slotted bushing production, and comprises a rack provided with a strip-shaped hole, a driving mechanism used for enabling a strip to slide in the strip-shaped hole in a reciprocating manner, and a forming mechanism, the forming mechanism comprises a pressing block, a first forming block, a second forming block, a first cutter and a second cutter which are arranged on the machine frame, the strip is rolled and cut through sliding of all the components, and the straight cylinder type slotted lining is formed. The first forming block is adopted to replace an existing core rod, compared with an existing core rod auxiliary rolling method, the influence caused by deflection is avoided, the size of the slotted lining is stable, the internal organizational structure and the stress state are uniform, the precision of the slotted lining is high, the forming quality of the slotted lining is greatly improved, and the production efficiency is improved. And the method is more suitable for manufacturing small-size slotted bushings.

Description

Technical Field

[0001] The utility model relates to the technical field of slotted bushing production, in particular to a straight-tube slotted bushing manufacturing device. Background Art

[0002] The cold extrusion strengthening technology of slotted bushings has the characteristics of large interference, strong operability and high extrusion quality. It can significantly improve the fatigue life of the fastening holes of structural parts, and can also effectively improve its resistance to stress corrosion and corrosion fatigue. It has been widely used in the strengthening of aircraft fastening holes and has achieved good results. The slotted bushing is an important component in the cold extrusion strengthening technology of slotted bushings. In the process of cold extrusion strengthening of slotted bushings, due to the use of slotted bushings, the damage of the hole during the extrusion process and the accumulation of extrusion port materials are avoided, the tension of the extrusion mandrel is reduced, and the radial extrusion deformation is efficiently transferred to the hole wall, ensuring the tangential residual compressive stress in the hole. Therefore, the slotted bushing is a key factor in ensuring its cold extrusion strengthening effect and quality.

[0003] At present, the slit bushing is usually formed by auxiliary rolling with a mandrel, but during the strip rolling process, the mandrel will bend, resulting in dimensional instability, uneven internal structure and stress state, and low precision of the slit bushing.

[0004] CN114535411A A slotted bushing manufacturing device and method, which acts on a strip material in a certain order through a pressing block, a lower cutter, an upper cutter, and a forming pressing block, so that the strip material is rolled on a rigid mandrel. After the strip material is rolled on the rigid mandrel, it is cut to form a slotted bushing. However, the mandrel is deflected due to the force of the rolled rigid mandrel, which leads to dimensional instability, uneven internal organizational structure and stress state, and low precision of the slotted bushing. In particular, when rolling a small-sized slotted bushing, the rigid mandrel has a small diameter, resulting in a larger deflection, and the precision of the slotted bushing is lower, which seriously affects the quality of the small-sized slotted bushing. Utility Model Content

[0005] The utility model aims to provide a straight-cylinder slotted bushing manufacturing device to solve the problem that during the rolling process of the existing slotted bushing through the mandrel, the mandrel will produce deflection which will affect the quality of the slotted bushing.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A straight-cylinder slotted bushing manufacturing device, comprising:

[0008] A frame, wherein the frame is provided with strip holes for the strip to pass through;

[0009] A driving mechanism, which is arranged on the back side of the frame and is used to make the strip material slide back and forth in the strip-shaped hole;

[0010] and a forming mechanism, which is arranged at the front side of the frame and is used to roll and cut the strip material to form a straight-tube slit bushing;

[0011] The forming mechanism comprises a pressing block, a first forming block, a second forming block, a first cutting knife and a second cutting knife which are respectively slidably arranged on the frame;

[0012] The pressing block and the first forming block respectively contact the two sides of the strip after sliding; a forming groove is provided on the side of the first forming block away from the frame;

[0013] The second forming block slides close to the front end of the strip, and when the strip is elongated, the second forming block guides the strip into the forming groove and makes the strip hollow-rolled in the forming groove;

[0014] The first cutter clamps the strip from both sides after sliding; the second cutter cuts the clamped strip after sliding.

[0015] Furthermore, the first forming block comprises a forming portion, and the forming portion is located at an edge of the forming groove close to the strip-shaped hole;

[0016] The second forming block is provided with a guide surface, which is close to the forming portion and forms a forming channel for the strip to pass through with the forming portion.

[0017] Furthermore, the guide surface is in the form of a plane, a convex arc or a concave arc.

[0018] Furthermore, the forming mechanism further comprises a first push rod slidably arranged on the frame, the first push rod contacts the first cutter after sliding, and the first push rod and the second cutter are respectively located on two sides of the strip.

[0019] Furthermore, the above-mentioned forming mechanism also includes a second push rod slidably arranged on the frame, and the second push rod contacts the first forming block after sliding, and the second push rod and the pressing block are respectively located on both sides of the strip.

[0020] Furthermore, the position where the second push rod contacts the first forming block after sliding is opposite to the side surface of the strip.

[0021] The utility model has the following beneficial effects:

[0022] The utility model adopts a first forming block to replace the existing core rod. During the rolling process of the strip, the strip is bent by the second forming block. After the strip is bent, it is hollow-rolled into a flanging cylinder in the forming groove of the first forming block. The first cutter and the second cutter shear the cylindrical strip to form a slit bushing. Compared with the existing method of rolling with the assistance of a core rod, the utility model avoids the influence of deflection, so that the size of the slit bushing is stable, the internal organizational structure and the stress state are uniform, the precision of the slit bushing is high, the molding quality of the slit bushing is greatly improved, and it is more suitable for the manufacture of small-sized slit bushings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a straight-cylinder slotted bushing manufacturing device of the utility model;

[0024] Figure 2 It is a schematic diagram of the straight-tube slotted bushing manufacturing device of the utility model when manufacturing the straight-tube slotted bushing;

[0025] Figure 3 It is a schematic diagram of strip rolling when rolling a straight-tube slit bushing according to the utility model.

[0026] In the figure: 10-frame; 11-strip hole; 20-forming mechanism; 21-pressing block; 22-first forming block; 23-second forming block; 24-first cutter; 25-second cutter; 26-first push rod; 27-second push rod; 30-strip; 40-driving mechanism; 221-forming groove; 222-forming part; 231-guide surface. 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] Please refer to Figures 1 to 3 The present embodiment provides a straight-cylindrical slotted bushing manufacturing device, comprising: a vertically arranged frame 10, and a driving mechanism 40 and a forming mechanism 20 respectively arranged at the back and front sides of the frame 10. The frame 10 is provided with a strip hole 11, and the strip material 30 passes through the strip hole 11 after passing through the driving mechanism 40, and is manufactured by the forming mechanism 20 to obtain a straight-cylindrical slotted bushing. After the straight-cylindrical slotted bushing passes through the turning process, it can form a flanged slotted bushing. The turning process belongs to the prior art and will not be described in detail here.

[0029] The strip hole 11 can be set in any orientation, based on the fact that the strip material 30 can pass through the strip hole 11 and can be manufactured into a straight cylindrical slotted bushing by the forming mechanism 20. For example, the length extension direction of the strip hole 11 is perpendicular to the frame 10, and the width extension direction of the strip hole 11 is in a horizontal position, a vertical position, or has an angle less than 90° with the horizontal position. For example, the length extension direction of the strip hole 11 can also have a certain angle with the frame 10; the cross-sectional size of the strip hole 11 corresponds to the strip material 30, so as to limit the strip material 30 and not restrict the strip material 30 from sliding. In this embodiment, the length extension direction of the strip hole 11 is perpendicular to the frame 10, and the width extension direction of the strip hole 11 is in a horizontal position.

[0030] The driving mechanism 40 can be any driving structure capable of conveying the strip 30 . For example, multiple pairs of conveying wheels are used to convey the strip 30 . The specific structure of the driving mechanism 40 belongs to the prior art and will not be described in detail herein.

[0031] The forming mechanism 20 includes a pressing block 21, a first forming block 22, a second forming block 23, a first cutter 24, and a second cutter 25, which are respectively slidably arranged on the front side of the frame 10. The pressing block 21, the first forming block 22, the second forming block 23, the first cutter 24, and the second cutter 25 are respectively slidably arranged on the frame 10 through the sliding mechanism and are all facing the strip hole 11. The independent sliding arrangement of each component allows each component to work independently or in linkage. The sliding mechanism adopts an existing mechanism of matching a slider and a slide groove, and each component is installed on the slider. The driving method of the sliding mechanism can be motor drive, hydraulic drive, etc.

[0032] The length of the pressing block 21, the length of the first forming block 22 and the length of the second forming block 23 are all greater than the width of the strip 30. The pressing block 21, the first forming block 22 and the second forming block 23 can adapt to the strip 30 after sliding. The first cutter 24 is provided with a bayonet for fixing the strip 30. The depth of the bayonet is greater than the width of the strip 30. The first cutter 24 can fix the strip 30 in the bayonet after sliding. The second cutter 25 has a blade for shearing the strip 30. The plane formed by the blade when sliding is perpendicular to the unrolled strip 30, so as to cut the strip 30 transversely.

[0033] A molding groove 221 is provided on one side of the first molding block 22 away from the frame 10 along the extension direction of the first molding block 22, and the molding groove 221 is parallel to the strip hole 11. The first molding block 22 includes a molding portion 222, and the molding portion 222 is located at the edge of the molding groove 221 close to the strip hole 11, that is, the molding portion 222 is naturally formed after the first molding block 22 is provided with the molding groove 221. The second molding block 23 is provided with a guide surface 231, and after the first molding block 22 and the second molding block 23 slide, the guide surface 231 is close to the molding portion 222 and forms a molding channel for the strip 30 to pass through between the molding portion 222. The guide surface 231 can be any shape that can guide the strip 30, such as a plane, a convex arc, or a concave arc.

[0034] When the straight cylindrical slotted bushing is not manufactured, the pressing block 21 , the first forming block 22 , the second forming block 23 , the first cutter 24 and the second cutter 25 are all away from the strip hole 11 and the strip 30 . In the process of manufacturing the straight-cylindrical slit bushing, the arrangement of the strip hole 1, the pressing block 21, the first forming block 22, the second forming block 23, the first cutter 24 and the second cutter 25 can meet the following conditions: the pressing block 21 and the first forming block 22 can contact the two sides of the strip 30 respectively after sliding, and have a limiting effect on the strip 30; the second forming block 23 is close to the front end of the strip 30 after sliding, and the strip 30 is bent by the guide surface 231 on the second forming block 23 when the strip 30 is stretched, and the bent strip 30 is rolled and formed in the forming groove 221. Since the guide surface 231 continuously extrudes and bends the strip 30, the strip 30 is uniformly stressed, and the internal organizational structure and stress state of the manufactured straight-cylindrical slit bushing are uniform, and the product quality is good; after the first cutter 24 slides, it clamps the strip 30 from the horizontal direction through the bayonet; after the second cutter 25 slides, it cuts the clamped strip 30, thereby manufacturing the straight-cylindrical slit bushing.

[0035] In order to prevent the first cutter 24 from being displaced when subjected to cutting force, in the present embodiment, the forming mechanism 20 further includes a first push rod 26 slidably disposed on the frame 10. The sliding setting manner of the first push rod 26 is consistent with the sliding setting manner of the first cutter 24. After sliding, the first push rod 26 contacts the first cutter 24, and during cutting, the first push rod 26 and the second cutter 25 are respectively located on both sides of the strip 30.

[0036] Since the first forming block 22 is in the shape of a long strip, in order to prevent the first forming block 22 from being deformed by force during the rolling process, in the present embodiment, the forming mechanism 20 also includes a second push rod 27 slidably arranged on the frame 10, and the sliding arrangement of the second push rod 27 is consistent with the sliding arrangement of the first forming block 22. After sliding, the second push rod 27 contacts the first forming block 22, and the second push rod 27 and the pressing block 21 are respectively located on both sides of the strip 30, that is, the second push rod 27 and the first forming block 22 are located on the same side of the strip 30.

[0037] Preferably, the position where the second push rod 27 is released from the first forming block 22 after sliding is opposite to the side surface of the strip 30 .

[0038] In this embodiment, when observed in the direction facing the forming mechanism 20, the width extension direction and the length extension direction of the strip hole 11 are both in the horizontal direction, the pressing block 21 is located at the upper left of the strip hole 11, the first forming block 22 is located at the right side of the strip hole 11, the second forming block 23 is located above the strip hole 11, the first cutter 24 is located at the left side of the strip hole 11, the second cutter 25 is located at the upper right of the strip hole 11, the first push rod 26 is located at the lower left of the strip hole 11, and the second push rod 27 is located below the strip hole 11.

[0039] In other embodiments of the utility model, the strip hole 11, the pressing block 21, the first forming block 22, the second forming block 23, the first cutter 24, the second cutter 25, the first push rod 26 and the second push rod 27 can also be arranged in other ways, such as the orientation of the strip hole 11 remains unchanged, the positions of the pressing block 21 and the second cutter 25 are swapped, and the positions of the first cutter 24 and the first forming block 22 are swapped, and the first push rod 26 is located at the lower right of the strip hole 11; for example, the positions of the pressing block 21, the first forming block 22, the second forming block 23, the first cutter 24, the second cutter 25, the first push rod 26 and the second push rod 27 relative to the strip hole 11 remain unchanged, and the strip hole 11 and the entire forming mechanism 20 are tilted at a certain angle as a whole; the positional relationship between the strip hole 11 and the various components in the forming mechanism 20 is based on the ability to roll and cut the strip 30.

[0040] The manufacturing process of the straight-tube slotted bushing manufacturing device of the utility model comprises the following steps:

[0041] S1: The strip 30 passes through the driving mechanism 40 and then passes through the strip hole 11 and exceeds the starting position of the strip 30 rolling;

[0042] S2: Align the front end of the strip 30 so that the front end of the strip 30 coincides with the starting position of the rolling. The specific process is: the first cutter 24 slides to clamp the strip 30, and the second cutter 25 slides to cut the strip 30. The front end of the cut strip 30 is the starting position of the rolling. Then, the first cutter 24 and the second cutter 25 slide in opposite directions to move away from the strip 30.

[0043] S3: the pressing block 21 and the first forming block 22 slide and abut against two sides of the strip 30 respectively;

[0044] S4: the second forming block 23 slides close to the front end of the strip 30;

[0045] S5: The driving mechanism 40 drives the strip 30 to move forward, and is rolled into the forming groove 221 under the extrusion of the second forming block 23 until the set length is rolled, so that the front end of the strip 30 is rolled into a cylindrical shape with overlapping edges;

[0046] S6: the pressing block 21, the first forming block 22 and the second forming block 23 slide in opposite directions respectively, away from the strip 30;

[0047] S7: The driving mechanism 40 drives the strip 30 to move forward;

[0048] S8: The first cutter 24 slides to clamp the strip 30, and the driving mechanism 40 drives the strip 30 to move in the reverse direction to move the strip 30 to a position to be cut;

[0049] S9: The second cutter 25 slides to cut the strip 30, and the cut portion is a straight-tube slit bushing;

[0050] S10: the driving mechanism 40 drives the cut strip 30 to move so that the front end of the strip 30 coincides with the starting position of the rolling;

[0051] S11: Repeat steps S3 to S10 to complete the repeated manufacturing of the straight-tube slotted bushing.

[0052] When the first cutter 24 clamps the strip 30 , the first push rod 26 slides and abuts against the first cutter 24 ; when the first forming block 22 abuts against the strip 30 , the second push rod 27 slides and abuts against the first forming block 22 .

[0053] This embodiment adopts the first forming block 22 to replace the existing core rod. During the rolling process, the strip 30 is bent by the second forming block 23. After being bent, the strip 30 is hollow-rolled into a flanged cylindrical shape in the forming groove 221 of the first forming block 22. The cylindrical strip 30 is then sheared by the first cutter 24 and the second cutter 25 to form a slit bushing. Compared with the existing method of rolling with the assistance of a core rod, the influence of deflection is avoided, so that the size of the slit bushing is stable, the internal structure and stress state are uniform, the precision of the slit bushing is high, the molding quality of the slit bushing is greatly improved, and it is more suitable for the manufacture of small-sized slit bushings.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A straight-cylinder slotted bushing manufacturing device, characterized in that: include: A frame (10), wherein the frame (10) is provided with strip holes (11) for the strip to pass through; A driving mechanism, the driving mechanism being arranged on the back side of the frame (10) and being used for making the strip material slide back and forth in the strip-shaped hole (11); and a forming mechanism (20), the forming mechanism (20) being arranged on the front side of the frame (10) and being used for rolling and cutting the strip material to form a straight-cylindrical slit bushing; The forming mechanism (20) comprises a pressing block (21), a first forming block (22), a second forming block (23), a first cutter (24) and a second cutter (25) which are respectively slidably arranged on the frame (10); The pressing block (21) and the first forming block (22) are in contact with two sides of the strip respectively after sliding; a forming groove (221) is provided on a side of the first forming block (22) away from the frame (10); The second forming block (23) is close to the front end of the strip after sliding, and when the strip is elongated, the second forming block (23) guides the strip into the forming groove (221) and makes the strip hollow-rolled in the forming groove (221); The first cutter (24) clamps the strip from both sides after sliding; and the second cutter (25) cuts the clamped strip after sliding.

2. The straight-cylinder slotted bushing manufacturing device according to claim 1 is characterized in that: The first forming block (22) comprises a forming portion (222), and the forming portion (222) is located at an edge of the forming groove (221) close to the strip-shaped hole (11); The second forming block (23) is provided with a guide surface (231), and the guide surface (231) is close to the forming portion (222) and forms a forming channel for the strip to pass through between the guide surface (231) and the forming portion (222).

3. The straight-cylinder slotted bushing manufacturing device according to claim 2 is characterized in that: The guide surface (231) is in the form of a plane, a convex arc, or a concave arc.

4. The straight-cylinder slotted bushing manufacturing device according to claim 1, characterized in that: The forming mechanism (20) further comprises a first push rod (26) slidably arranged on the frame (10), wherein the first push rod (26) contacts the first cutter (24) after sliding, and the first push rod (26) and the second cutter (25) are respectively located on two sides of the strip.

5. The straight-cylinder slotted bushing manufacturing device according to claim 1, characterized in that: The forming mechanism (20) further comprises a second push rod (27) slidably arranged on the frame (10), wherein the second push rod (27) contacts the first forming block (22) after sliding, and the second push rod (27) and the pressing block (21) are respectively located on two sides of the strip.

6. The straight-cylinder slotted bushing manufacturing device according to claim 5, characterized in that: The position where the second push rod (27) contacts the first forming block (22) after sliding is opposite to the side surface of the strip.

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