Punching device and preparation method of complex elastic copper alloy elastic piece

Abstract

The invention discloses a stamping device and a preparation method of a complex elastic copper alloy elastic piece, and relates to the field of copper alloy elastic piece production, the stamping device comprises a device base and a stamping mechanism, the device base comprises a supporting base, the supporting base is provided with a polished rod, and a moving platform is slidably mounted on the polished rod of the supporting base; a central screw rod is rotatably mounted on the supporting base, the central screw rod is in threaded fit with the moving platform, the stamping mechanism comprises a stamping platform, the stamping platform is fixedly mounted on the supporting base, a hydraulic cylinder is fixedly mounted on the stamping platform, and a stamping table is fixedly mounted at the telescopic end of the hydraulic cylinder. According to the device, stamping oil coating can be automatically completed in the stamping process, the strength, the conductivity and the stress relaxation resistance of the elastic piece produced through the preparation method can meet the use requirements of a high-power electric push slip ring electric contact structure, and the device has the advantages of being simple in machining technology, high in production safety, low in cost and the like.

Description

Technical Field

[0001] The present invention relates to the field of copper alloy shrapnel production, and in particular to a stamping device and a preparation method for a complex elastic copper alloy shrapnel. Background Art

[0002] The marine working environment is relatively harsh, and it is very easy to have problems such as poor contact of electrical contact structure, increased contact resistance, and arc discharge, which seriously threaten the safety of ships. At present, the adaptive displacement compensation contact structure of high-power ship electric propulsion slip ring is made of beryllium bronze, but beryllium in beryllium bronze, which is the key to improving alloy performance, is a highly toxic element. At the same time, the mining of beryllium is difficult and costly, and the price is very expensive. In addition, beryllium bronze is very sensitive to temperature, which makes the heat treatment process of beryllium bronze relatively complicated and has extremely high requirements for the service environment temperature. Therefore, it is necessary to find a material to replace beryllium bronze as a current-carrying elastic material, while reducing the processing complexity of the shrapnel, which will greatly reduce the development cost. Summary of the invention

[0003] The purpose of the present invention is to provide a stamping device which can automatically complete the coating of stamping oil during the stamping process, and a method which can solve the problem of high production cost of copper alloy spring pieces in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a stamping device for complex elastic copper alloy spring pieces, including a device base and a stamping mechanism, the device base includes a supporting base, the supporting base is provided with a light rod, a mobile platform is slidably installed on the light rod of the supporting base, a center screw is rotatably installed on the supporting base, the center screw and the mobile platform form a threaded fit, the stamping mechanism includes a stamping platform, a stamping platform is fixedly installed on the supporting base, a hydraulic cylinder is fixedly installed on the stamping platform, a stamping table is fixedly installed on the telescopic end of the hydraulic cylinder, a control slide is slidably installed on the telescopic rod of the hydraulic cylinder, a slide spring is fixedly installed between the control slide and the stamping platform, a sliding block is slidably installed on the stamping platform, an oiling brush is slidably installed on the sliding block, a connecting rod is rotatably installed on the sliding block, and the connecting rod is rotatably connected to the control slide.

[0005] Furthermore, the stamping device also includes a grinding mechanism, which includes a cylinder base, which is fixedly installed on the ground, a lifting cylinder is fixedly installed on the cylinder base, a lifting seat is fixedly installed on the telescopic end of the lifting cylinder, a transverse motor is fixedly installed on the lifting seat, a transverse screw is fixedly installed on the output shaft of the transverse motor, a transverse slider is slidably installed on the lifting seat, and the transverse slider and the transverse screw form a threaded fit, a lifting slide is fixedly installed on the cylinder base, an output motor is slidably installed on the lifting slide, a driving pulley is fixedly installed on the output shaft of the output motor, a grinding roller is rotatably installed on the transverse slider, a grinding pulley is fixedly installed on the grinding roller, a transmission belt is fixedly installed on the driving pulley and the grinding pulley, and the driving pulley, the grinding pulley and the transmission belt form a belt connection.

[0006] Furthermore, a main shaft pulley is fixedly mounted on the central screw rod, and the main shaft pulley, the grinding pulley, the driving pulley and the transmission belt form a belt connection.

[0007] Furthermore, a stopper is fixedly installed on the stamping platform, and the stopper is used to limit the downward movement of the control slide.

[0008] A method for preparing a complex elastic copper alloy spring piece, using the above-mentioned stamping device, the specific material weight percentage is: Ni 4.5~8.0%; Si 1.0~1.5%; Al 0.2~0.5%; Mn 0.2~0.5%; the rest is Cu, wherein the mass ratio of Ni / Si is greater than 4, and the process steps include: smelting; casting; homogenization treatment; hot rolling; solution treatment; cold rolling; aging treatment; stamping.

[0009] Furthermore, the melting temperature is 1200~1250℃. The casting method is casting, and the casting temperature is 1050℃~1150℃. The homogenization treatment temperature is 950℃~1050℃, the holding time is 1~4h, and the cooling method is air cooling. The hot rolling temperature is 850℃~920℃, the final rolling temperature is between 700℃ and 730℃, and the hot rolling is carried out in 4~6 passes. The total deformation is about 75%, and the deformation per pass is less than 30%. The solution treatment temperature is 950℃~1000℃, the holding time is 2~6h, and the cooling method is air cooling.

[0010] Furthermore, the cold rolling is carried out in 5 to 8 passes, with a total deformation of about 80% and a pass deformation of less than 30%.

[0011] Furthermore, the aging treatment temperature is 430°C~480°C, the holding time is 1~4h, and the cooling method is air cooling.

[0012] Furthermore, stamping oil is evenly coated on the surface of the part before stamping, and after stamping, the stamped part can be polished using a grinder.

[0013] Compared with the prior art, the present invention has the following advantages: (1) the stamping device of the present invention can automatically apply stamping oil before stamping; (2) the grinding mechanism of the present invention can adjust the grinding position to automatically grind the parts after stamping; (3) the spring piece produced by the preparation method meets the high strength, high electrical conductivity and high stress relaxation resistance required by the electric contact structure of the electric push slip ring, and at the same time, the preparation process is simple, the production safety is high and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the support base of the present invention.

[0016] Figure 3 It is a schematic diagram of the stamping mechanism of the present invention.

[0017] Figure 4 It is a schematic diagram of the grinding mechanism of the present invention.

[0018] Figure 5 It is the overall structural front view of the present invention.

[0019] Figure 6 This is the part diagram after electroplating.

[0020] Figure numbers: 1-support base; 2-center screw; 3-moving platform; 4-stamping platform; 5-hydraulic cylinder; 6-stamping table; 7-control slide plate; 8-slide plate spring; 9-stopper; 10-sliding block; 11-oiling brush; 12-connecting rod; 13-spindle pulley; 14-transmission belt; 15-grinding pulley; 16-grinding roller; 17-cylinder base; 18-lifting cylinder; 19-lifting seat; 20-transverse motor; 21-transverse screw; 22-transverse slider; 23-output motor; 24-lifting slide. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0022] Example: Figure 1-Figure 5The stamping device of a complex elastic copper alloy spring piece shown in the figure includes a device base and a stamping mechanism, the device base includes a supporting base 1, the supporting base 1 is provided with a light rod, a moving platform 3 is slidably installed on the light rod of the supporting base 1, a center screw 2 is rotatably installed on the supporting base 1, and the center screw 2 forms a threaded fit with the moving platform 3, the stamping mechanism includes a stamping platform 4, a stamping platform 4 is fixedly installed on the supporting base 1, a hydraulic cylinder 5 is fixedly installed on the stamping platform 4, a stamping table 6 is fixedly installed on the telescopic end of the hydraulic cylinder 5, a control slide plate 7 is slidably installed on the telescopic rod of the hydraulic cylinder 5, a slide plate spring 8 is fixedly installed between the control slide plate 7 and the stamping platform 4, a sliding block 10 is slidably installed on the stamping platform 4, an oiling brush 11 is slidably installed on the sliding block 10, a connecting rod 12 is rotatably installed on the sliding block 10, and the connecting rod 12 is rotatably connected to the control slide plate 7. The central screw 2 rotates to drive the mobile platform 3 to slide on the support base 1. The mobile platform 3 slides on the support base 1 to change the position of the copper alloy shrapnel. The copper alloy shrapnel is loaded on the right side of the support base 1 and punched when it is in the middle position of the support base 1. The hydraulic cylinder 5 starts to drive the stamping table 6 to descend. The stamping table 6 descends to punch the copper alloy shrapnel. The stamping table 6 descends and drives the control slide 7 to descend. When the control slide 7 descends to the position of the block 9, the control slide 7 is restricted by the block 9 and will not descend. The stamping table 6 descends alone to complete the stamping. The control slide 7 slides on the telescopic rod of the hydraulic cylinder 5 and stays at the current position; when the stamping table 6 rises to contact with the control slide 7, it drives the control slide 7 to rise together. The rise of the control slide 7 drives the connecting rod 12 to swing. The connecting rod 12 drives the sliding block 10 to slide toward the center. The sliding block 10 drives the oiling brush 11 to move. The oiling brush 11 first applies stamping oil to the copper alloy shrapnel before stamping.

[0023] The stamping device also includes a grinding mechanism, which includes a cylinder base 17, which is fixedly installed on the ground, a lifting cylinder 18 is fixedly installed on the cylinder base 17, a lifting seat 19 is fixedly installed on the telescopic end of the lifting cylinder 18, a transverse motor 20 is fixedly installed on the lifting seat 19, a transverse screw 21 is fixedly installed on the output shaft of the transverse motor 20, a transverse slider 22 is slidably installed on the lifting seat 19, and the transverse slider 22 forms a threaded fit with the transverse screw 21, a lifting slide 24 is fixedly installed on the cylinder base 17, an output motor 23 is slidably installed on the lifting slide 24, a driving pulley is fixedly installed on the output shaft of the output motor 23, a grinding roller 16 is rotatably installed on the transverse slider 22, a grinding pulley 15 is fixedly installed on the grinding roller 16, a transmission belt 14 is fixedly installed on the driving pulley and the grinding pulley 15, and the driving pulley, the grinding pulley 15, and the transmission belt 14 form a belt connection. The output motor 23 starts to drive the transmission belt 14 to rotate, the transmission belt 14 drives the grinding pulley 15 to rotate, the grinding pulley 15 drives the grinding roller 16 to rotate, and the stamped spring piece is polished. The lifting cylinder 18 starts to drive the lifting seat 19 to rise and fall, and adjust the grinding height. The transverse motor 20 starts to drive the transverse screw 21 to rotate, and the transverse screw 21 drives the transverse slider 22 to slide on the lifting seat 19 to change the grinding position. A spring is arranged between the output motor 23 and the cylinder base 17. Combined with the influence of the output motor 23's own gravity, the transmission belt 14 is always in a tensioned state. When the grinding pulley 15 moves horizontally or vertically, the output motor 23 adaptively rises and slides on the lifting slide 24, so that the grinding roller 16 can always be driven by the output motor 23.

[0024] The main shaft pulley 13 is fixedly mounted on the central screw 2, and the main shaft pulley 13, the grinding pulley 15, the driving pulley, and the transmission belt 14 form a belt connection. The output motor 23 drives the transmission belt 14 to rotate, the transmission belt 14 drives the grinding pulley 15 and the main shaft pulley 13 to rotate, and the main shaft pulley 13 drives the central screw 2 to rotate, so that the output motor 23 controls the grinding mechanism and the device base to work together.

[0025] A stopper 9 is fixedly mounted on the stamping platform 4 , and the stopper 9 is used to limit the downward movement of the control slide plate 7 .

[0026] A method for preparing a complex elastic copper alloy spring piece, using the above-mentioned stamping equipment, the preparation process is as follows: 1. Melting: Add the ingredients in Table 1 into the crucible, raise the temperature to 1250°C, and wait for the melt to be completely melted; 2. Casting: Stir the completely melted melt evenly, wait until the temperature drops to 1100℃, and then cast; 3. Homogenization treatment: put the ingot into a box furnace for homogenization treatment at a temperature of 1000°C, a holding time of 4 hours, and an air cooling method; 4. Hot rolling: the starting rolling temperature is 900℃, the final rolling temperature is 700℃, the total deformation is about 75%, and the pass deformation is about 30%; 5. Solution treatment: put the hot rolled plate into a box furnace for solution treatment at a temperature of 980°C, a holding time of 4 hours, and an air cooling method; 6. Cold rolling: The hot-rolled plate after solution treatment is cold rolled, with a total deformation of about 80% and a pass deformation of about 30%; 7. Aging treatment: put the cold rolled sheet into a box furnace for aging treatment at a temperature of 450°C, a holding time of 1h, and an air cooling method; 8. Stamping: Stamp the cold rolled sheet into shape and polish the surface to make it smooth. Figure 1 As shown; 9. Electroplating: Electroplating silver coating on the surface of parts. The actual picture of parts after electroplating is as follows Figure 6 shown.

[0027] The complex elastic copper alloy shrapnel of the present invention can still maintain stable contact after 20 million revolutions in actual work, and the contact resistance, working voltage and current all meet the technical requirements. No arc discharge occurs, no visible deformation occurs, and only slight scratches appear on the surface. This indicates that the complex elastic copper alloy shrapnel of the present invention meets the high strength, high conductivity and high stress relaxation resistance required by the electric push slip ring electrical contact structure.

[0028] Table 1 Alloy composition (wt%)

Claims

1. A punching device for complex elastic copper alloy springs, comprising a device base and a punching mechanism, characterized in that: The device base comprises a support base (1), the support base (1) is provided with a polished rod, a mobile platform (3) is slidably mounted on the polished rod of the support base (1), a central screw (2) is rotatably mounted on the support base (1), and the central screw (2) and the mobile platform (3) form a threaded fit, and a stamping mechanism comprises a stamping platform (4), a stamping platform (4) is fixedly mounted on the support base (1), a hydraulic cylinder (5) is fixedly mounted on the stamping platform (4), a stamping table (6) is fixedly mounted on the telescopic end of the hydraulic cylinder (5), a control slide plate (7) is slidably mounted on the telescopic rod of the hydraulic cylinder (5), a slide plate spring (8) is fixedly mounted between the control slide plate (7) and the stamping platform (4), a sliding block (10) is slidably mounted on the stamping platform (4), an oiling brush (11) is slidably mounted on the sliding block (10), a connecting rod (12) is rotatably mounted on the sliding block (10), and the connecting rod (12) is rotatably connected to the control slide plate (7).

2. The punching device for complex elastic copper alloy springs according to claim 1, characterized in that: The punching device also includes a grinding mechanism, which includes a cylinder base (17), the cylinder base (17) is fixedly mounted on the ground, a lifting cylinder (18) is fixedly mounted on the cylinder base (17), a lifting seat (19) is fixedly mounted on the telescopic end of the lifting cylinder (18), a traverse motor (20) is fixedly mounted on the lifting seat (19), a traverse screw (21) is fixedly mounted on the output shaft of the traverse motor (20), and a traverse slider (22) is slidably mounted on the lifting seat (19). ), the transverse sliding block (22) and the transverse screw rod (21) form a threaded fit, a lifting sliding block (24) is fixedly mounted on the cylinder base (17), an output motor (23) is slidably mounted on the lifting sliding block (24), a driving pulley is fixedly mounted on the output shaft of the output motor (23), a grinding roller (16) is rotatably mounted on the transverse sliding block (22), a grinding pulley (15) is fixedly mounted on the grinding roller (16), and a transmission belt ( 14), the driving pulley, the grinding pulley (15), and the transmission belt (14) form a belt connection; the output motor (23) is started to drive the transmission belt (14) to rotate, the transmission belt (14) drives the grinding pulley (15) to rotate, the grinding pulley (15) drives the grinding roller (16) to rotate, and the spring piece after stamping is polished, the lifting cylinder (18) is started to drive the lifting seat (19) to move up and down, and the polishing height is adjusted, the transverse motor (20) is started to drive the transverse screw (21) to rotate, and the transverse screw The rod (21) drives the transverse sliding block (22) to slide on the lifting seat (19) to change the grinding position. A spring is arranged between the output motor (23) and the cylinder base (17). Combined with the influence of the output motor (23)'s own gravity, the transmission belt (14) is always in a tensioned state. When the grinding pulley (15) moves horizontally or vertically, the output motor (23) adaptively rises and falls on the lifting slide (24), so that the grinding roller (16) can always be driven by the output motor (23).

3. The punching device for complex elastic copper alloy springs according to claim 2, characterized in that: A main shaft pulley (13) is fixedly mounted on the central screw (2); the main shaft pulley (13), the grinding pulley (15), the driving pulley, and the transmission belt (14) form a belt connection; the output motor (23) drives the transmission belt (14) to rotate, the transmission belt (14) drives the grinding pulley (15) and the main shaft pulley (13) to rotate, and the main shaft pulley (13) drives the central screw (2) to rotate, thereby realizing that the output motor (23) simultaneously controls the grinding mechanism and the device base to work together.

4. The punching device for complex elastic copper alloy springs according to claim 3, characterized in that: A stopper (9) is fixedly mounted on the stamping platform (4), and the stopper (9) is used to limit the downward movement of the control slide plate (7).

5. A method for preparing a complex elastic copper alloy shrapnel, characterized in that: The punching device according to claim 1-4 is used, and the specific weight percentage of the materials is: Ni 4.5~8.0%; Si 1.0~1.5%; Al 0.2~0.5%; Mn 0.2~0.5%; The rest is Cu, in which the mass ratio of Ni / Si is greater than 4. The process steps include: smelting; casting; homogenization treatment; hot rolling; solution treatment; cold rolling; aging treatment; and stamping.

6. The method for preparing a complex elastic copper alloy spring sheet according to claim 5, characterized in that: The melting temperature is 1200~1250℃; the casting method is casting, and the casting temperature is 1050℃~1150℃; the homogenization treatment temperature is 950℃~1050℃, the holding time is 1~4h, and the cooling method is air cooling; the hot rolling temperature is 850℃~920℃, the final rolling temperature is between 700℃ and above 730℃, the hot rolling is carried out in 4~6 passes, the total deformation is about 75%, and the deformation per pass is less than 30%; the solution treatment temperature is 950℃~1000℃, the holding time is 2~6h, and the cooling method is air cooling.

7. The method for preparing a complex elastic copper alloy spring sheet according to claim 6, characterized in that: Cold rolling is carried out in 5 to 8 passes, with a total deformation of about 80% and a pass deformation of less than 30%.

8. The method for preparing a complex elastic copper alloy spring sheet according to claim 7, characterized in that: The aging treatment temperature is 430℃~480℃, the holding time is 1~4h, and the cooling method is air cooling.

9. The method for preparing a complex elastic copper alloy spring sheet according to claim 8, characterized in that: Before stamping, evenly apply stamping oil on the surface of the parts. After stamping, the stamped parts can be polished using a grinder.

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