A stainless steel sheet clip bending and forming device

Abstract

The present invention belongs to the technical field of mechanical cold processing, and specifically relates to a forming device for bending a stainless steel sheet clip. The device includes a chassis, a core shaft, an eccentric shaft, a latch, a first rotating block assembly, a second rotating block assembly, a positioning plate, a clamping screw, a pin, a screw, a pad, a nut, a pressing block, and a fixed block; the first rotating block assembly includes a first rotating block and a handle; the second rotating block assembly includes a second rotating block and a handle; wherein the first rotating block assembly is used in conjunction with the core shaft, and the second rotating block assembly is used in conjunction with the eccentric shaft. The use of the device solves the problem that stainless steel sheets are difficult to bend manually due to their high hardness and large rebound, and are physically demanding and difficult to form.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical cold processing, and in particular relates to a forming device for bending a stainless steel sheet clip. Background Art

[0002] Stainless steel sheet clips are used to fix oil pipes, cables, etc. in aircraft racks. The clip material is stainless steel, 1mm thick, 10mm wide, and the blank is a steel strip. The clip shape is required to be regular, the hole spacing is guaranteed, and the holes have been processed before bending. Due to the high hardness and large rebound of stainless steel sheets, it is difficult to bend them manually, and it is labor-intensive. The bent clips are irregular in shape, and the size of the clips is different each time, and there are traces of pliers. Summary of the invention

[0003] In order to solve the above technical problems, a manual bending mechanism with simple structure, convenient operation and low cost is provided, which is a forming device for bending stainless steel sheet clips.

[0004] The technical solution adopted by the present invention is: a stainless steel sheet clip bending forming device, including a chassis, a core shaft, an eccentric shaft, a latch, a first rotating block assembly, a second rotating block assembly, a positioning plate, a clamping screw, a pin, a screw, a pad, a nut, a pressing block, and a fixed block; the first rotating block assembly includes a first rotating block and a handle; the second rotating block assembly includes a second rotating block and a handle;

[0005] The nut is arranged on the upper plane of the chassis and is connected and fixed by screws and pins. A center hole, a square hole and a positioning pin hole are processed in the center of the chassis;

[0006] The clamping screw is screwed into the nut and moves axially in the nut;

[0007] The pressing block is screwed into the front end of the clamping screw and moves axially with the clamping screw. The threaded hole processed at one end of the pressing block is consistent with the clamping screw, and the center hole processed at the other end is transitionally matched with the locating pin size. The nut, the clamping screw and the pressing block are assembled into one piece.

[0008] The positioning plate is arranged in the bottom square hole of the chassis, and is interference fit with the square hole of the chassis. The positioning hole is processed on the positioning plate and is consistent with the part hole.

[0009] The threaded hole on the nut is equal to the hole on the positioning plate and the center hole of the chassis.

[0010] The positioning pin passes through the part hole and then is inserted into the positioning plate hole to position the part. The positioning pin and the positioning plate cooperate with each other according to the gap.

[0011] The fixing block is arranged under the chassis and fixed by welding, and its function is to be clamped on the vise for working;

[0012] The two pin holes are processed on the backing plate for installing the pins; the whole function is to insert the two pins on the backing plate into the two corresponding holes on the chassis, the end of the backing plate is close to the positioning plate, the positioning pin passes through the hole on the part, and then is inserted into the hole on the positioning plate, and the small fillet of the part is bent by the fillet on the positioning plate;

[0013] The mandrel is inserted into the center hole of the chassis, the small end shaft and the hole are matched with a gap, the center of the mandrel is processed into a through hole, and it is concentric with the two shafts during processing, and the size of the large end shaft is smaller than the size of the part;

[0014] The end of the first rotating block is machined with a through hole, which is consistent with the center hole of the mandrel; one side is designed as a triangular circular boss, which is coordinated with the size of the mandrel to ensure the thickness of the part, and the table surface faces downward during operation. The tail of the first rotating block is machined with a threaded hole for handle connection, and the two are combined to form the first rotating block assembly; the function is to place the first rotating block assembly on the mandrel, and pass the latch through the through hole and the center hole of the mandrel to move the first rotating block assembly at the same time, so as to connect and apply downward pressure, and then move the first rotating block assembly with the latch as the center of the circle, and the triangular circular boss rotates around the large end axis of the mandrel to extrude and make a large circle bend of the part;

[0015] Considering the springback of the parts, the eccentric shaft is set. The eccentric shaft is placed in the center hole of the chassis, the small end shaft and the hole are matched according to the clearance, the through hole is processed in the center of the eccentric shaft, and it is concentric with the large shaft during processing. The small end shaft is eccentric to the large end shaft, and the size of the large end shaft is the same as the size of the parts;

[0016] The end of the second rotating block is processed with a through hole, which is consistent with the through hole of the eccentric shaft; one side is designed as a triangular circular boss, which is coordinated with the large shaft size of the eccentric shaft to ensure the thickness of the part. The tail of the second rotating block is processed with a threaded hole for handle connection, and the two are combined into a second rotating block assembly; the function is to place the second rotating block assembly on the eccentric shaft, and pass the pin through the through hole of the second rotating block assembly and the through hole of the eccentric shaft at the same time to connect and apply downward pressure. After that, the second rotating block assembly takes the pin as the center of the circle, and the triangular circular boss rotates around the large end shaft of the eccentric shaft to make the large circle of the part finally meet the size requirements.

[0017] The present invention discloses a forming device for bending a steel sheet clip. Positioning is performed using a positioning plate, a pressing block and a positioning pin installed on a clamping screw are used to fix the clamping parts, a pad and a positioning plate are used to perform small fillet bending, a mandrel and an eccentric shaft are used to insert into the center hole of a chassis, a rotating block is placed on the axis of the mandrel and the eccentric shaft, a pin is passed through the hole on the rotating block and the holes of the mandrel and the eccentric shaft at the same time, the rotating block is used to rotate around the mandrel, and a triangular boss on the rotating block and a large end shaft on the mandrel and the eccentric shaft are used to perform large circle bending.

[0018] The bending method has the advantages of simple structure, convenient operation, accurate positioning and high precision. The processed parts meet the process requirements and are economical and applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : A schematic diagram of the structure of a stainless steel sheet clip bending and forming device;

[0020] In the figure: 1. Chassis 2. Mandrel 3. Latch 4. First rotating block 5. Second rotating block 6. Handle 7. Fixed block 8. Eccentric shaft 9. Pad 10. Pin 11. Positioning plate 12. Positioning pin 13. Pressing block 14. Nut 15. Pin 16. Screw 17. Pressing screw 18. Parts 19. Steel strip DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] A forming device for bending a stainless steel sheet clip, the main implementation process is: first, the fixing block 7 under the chassis 1 is clamped in the vise, and the steel strip 19 is placed between the positioning plate 11 and the pressure block 13, and the positioning pin 12 passes through the hole on the steel strip 19, and then is inserted into the positioning hole on the positioning plate 11 to position the blank steel strip 19; the nut 14 is set on the upper plane of the chassis 1, and is connected and fixed by the screw 16 and the pin 15, and the clamping screw 17 is screwed into the nut 14, and the pressure block 13 is screwed into the front end of the clamping screw 17, and the clamping screw 17 is screwed to drive the pressure block 13 to move toward the positioning plate 11, and the pressure block 13 presses the steel strip 19; the two pins 10 on the pad 9 are inserted into the two corresponding holes on the chassis 1, and one end of the pad 9 is pressed against the positioning plate 11, and the steel strip 19 is bent with a small fillet against the rounded corner on the positioning plate 11; then the pad 9 is removed, and the mandrel 2 is removed. The small end of the shaft is inserted into the center hole of the chassis 1, and then the first rotating block assembly (4, 6) is placed on the core shaft 2, and the pin 3 is simultaneously passed through the holes of the first rotating block 4 and the core shaft 2 and a downward force is applied to the axis of the core shaft. With the large end shaft on the core shaft 2 as the center of the circle, the triangular circular boss on the first rotating block 4 rotates around the large end shaft of the core shaft 2 to make a large circle bending of the part; then the core shaft 2 and the second rotating block 5 are removed together, and finally the small end of the shaft of the core shaft 2 is inserted into the center hole of the chassis 1, and then the second rotating block assembly (5, 6) is placed on the eccentric shaft 8, and the pin 3 is simultaneously passed through the holes of the second rotating block 5 and the eccentric shaft 8 and a downward force is applied to the axis of the eccentric shaft. With the large end shaft on the eccentric shaft 8 as the center of the circle, the triangular circular boss on the second rotating block 5 rotates around the large end shaft of the eccentric shaft 8 to make a large circle bending of the part to the final size, the pin is pulled out, the second rotating block 5 is removed, and the part is taken out, thus completing the entire bending process.

[0023] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation method part.

Claims

1. A stainless steel sheet clip bending and forming device, characterized in that: It includes a chassis, a core shaft, an eccentric shaft, a latch, a first rotating block assembly, a second rotating block assembly, a positioning plate, a positioning pin, a clamping screw, a pin, a screw, a pad, a nut, a clamping block, and a fixed block; the first rotating block assembly includes a first rotating block and a first handle; the second rotating block assembly includes a second rotating block and a second handle; the nut is arranged on a plane on the chassis and is connected and fixed by screws and pins, and a center hole is processed in the center of the chassis; the clamping screw is screwed into the nut and moves axially in the nut; the clamping block is screwed into the front end head of the clamping screw and moves axially with the clamping screw, a threaded hole consistent with the clamping screw is processed in the center of one end of the clamping block, and a hole with a transitional size matching the positioning pin is processed in the center of the other end, the nut, the clamping The screws and the pressure block are assembled into one body; the positioning plate is arranged in the square hole of the chassis, and has an interference fit with the square hole of the chassis. The positioning hole is processed on the positioning plate, and the positioning hole is consistent with the part hole; the positioning pin passes through the part hole and is then inserted into the positioning hole on the positioning plate, and its function is to position the part, and the positioning pin and the positioning plate have a clearance fit; the fixing block is arranged under the chassis and fixed by welding, and its function is to be clamped in a vise; two pin holes are processed on the pad plate for installing pins; the two pins on the pad plate are inserted into the two corresponding pin holes on the chassis, the end of the pad plate is close to the positioning plate, and the small fillet of the part is bent by the fillet on the positioning plate; the mandrel is inserted into the center hole of the chassis, and the small end shaft of the mandrel has a clearance fit with the center hole, and the mandrel A through hole is processed in the center, and during processing, the through hole is concentric with the small-end shaft and the large-end shaft, and the size of the large-end shaft is smaller than the size of the part; a through hole is set at the end of the first rotating block, and the through hole is consistent with the through hole of the core shaft; one side of the first rotating block is designed as a triangular circular boss, and the triangular circular boss is coordinated with the size of the core shaft to ensure the thickness of the part; a threaded hole is processed at the tail of the first rotating block for connecting the first handle; the first rotating block assembly is placed on the core shaft, and the pin is passed through the through hole of the first rotating block assembly and the through hole of the core shaft at the same time. The first rotating block assembly takes the pin as the center of the circle, and the triangular circular boss is rotated and extruded around the large-end shaft of the core shaft to make a large circle bend of the part; the eccentric shaft is placed in the center hole of the chassis, and the small-end shaft of the eccentric shaft is matched with the center hole. A through hole is processed in the center of the shaft. During processing, the through hole is concentric with the large end shaft of the eccentric shaft, the small end shaft of the eccentric shaft is eccentric to the large end shaft, and the size of the large end shaft is the same as the size of the part; a through hole is processed at the end of the second rotating block, and the through hole is consistent with the through hole of the eccentric shaft; one side of the second rotating block is designed to be a triangular circular boss, and the size of the triangular circular boss is coordinated with the large end shaft of the eccentric shaft to ensure the thickness of the part; a threaded hole is processed at the tail of the second rotating block for connecting the second handle; the second rotating block assembly is placed on the eccentric shaft, and a pin is passed through the through hole of the second rotating block assembly and the through hole of the eccentric shaft at the same time. The second rotating block assembly takes the pin as the center of the circle, and the triangular circular boss rotates around the large end shaft of the eccentric shaft to make the large circle of the part finally meet the size requirements.

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