A process for manufacturing an overhanging clip

Abstract

The application relates to a processing technology of a suspension clamp. First, round stock of 6082 aluminum material is heated to 480-490 DEG C and heated for 2-10 hours; when hot forging is performed, a friction press is used to control die forging pressure; after one-time forging, the workpiece is placed into a heating furnace to wait for temperature to reach 480 DEG C, and then secondary forging is performed again; after secondary forging, the workpiece is placed into the heating furnace to be heated to 480 DEG C, and then third-time forging is performed again; after forging, the workpiece is subjected to removal of fins and burrs, and then is polished; heat treatment is performed, the workpiece is sent into a solid solution furnace, the solid solution temperature is set to 530 DEG C, and the heat preservation time is 5h; then the workpiece is sent into an aging furnace, the aging temperature is set to 180 DEG C, and the heat preservation time is 10h; after heat treatment, the workpiece is subjected to surface shot blasting treatment, and the processing is completed. The application has the advantages that the process is perfect, the product strength after forging meets the product requirements through the three-time forging mode combined with the subsequent heat treatment process, the forging die is improved, and the service life of the forging die is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric power fittings, in particular to a processing technology of a suspension clamp. BACKGROUND

[0002] In the past, the suspension clamp is hot forged by forging aluminum during processing. It is difficult to guarantee the strength of the product by the general forging method. After the forging is completed by the forging die, the suspension clamp blank is pushed out of the lower die by the ejection mechanism to facilitate the operator to take the material and send it to the next process for further processing. However, in the past, the lower surface of the lower die uses a cylinder to push the top plate upward, and the top plate drives the ejector rod upward. The reset is pushed down by the spring. The top plate floats up and down, and the moving area needs to be opened in the bottom of the lower die to provide a groove for the floating of the top plate, which causes the overall rigidity of the lower die to be insufficient. After a period of use, the lower die cracks and deforms, resulting in unqualified products and the need to replace the lower die, which cannot meet the long-term forging production needs. Furthermore, the upward and downward floating action of the top plate has no guide, which is easy to interfere with the inner wall of the groove, causing the top plate to deform and damaging the lower die, aggravating the cracking and deformation of the lower die. The deformation of the top plate causes the deformation of the ejector rod, and the root weld of the ejector rod breaks, which cannot continue to work and still needs to be replaced. The lower die needs to be disassembled, which is time-consuming and laborious. In addition, the upward movement of the top plate has no limit, which will compress the spring all the time. The entire lower die continuously bears a large force, which is one of the problems of the cracking and deformation of the lower die. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a processing technology of a suspension clamp, which is reasonable in process and meets the product index requirements in workpiece strength. At the same time, the forging die is compact and reasonable, which improves the overall strength and prolongs the service life of the die.

[0004] The technical scheme of the present application is as follows:

[0005] A processing technology of a suspension clamp, the specific steps are as follows,

[0006] 1) First, heat the round bar of 6082 aluminum material to 480-490℃ before hot forging. The heating should be uniform, and the heating time should be 2-10 hours;

[0007] 2) When hot forging, the die forging is controlled by a friction press. The heated round bar is placed in the groove of the convex surface of the lower die of the forging die, which simulates the suspension clamp. The convex surface of the groove of the upper die of the friction press is lowered, and the convex surface of the groove of the lower die is extruded to forge the workpiece. After the die is closed, the die is opened, the workpiece is ejected by the demolding part, and the workpiece is taken out;

[0008] After the first hot forging, the size, appearance, and whether the upper and lower dies are centered of the forged part should be carefully checked;

[0009] 3) After the first forging, the workpiece is placed in the heating furnace to wait for the temperature to reach 480℃, and then the second forging is performed again.

[0010] 5) Heat treatment, send into the solid solution furnace, the solid solution temperature is set to 530℃, the holding time is 5h; then send into the aging furnace, the aging temperature is set to 180℃, the holding time is 10h;

[0011] 6) After heat treatment, the workpiece is subjected to surface shot blasting treatment, and the processing is completed.

[0012] During the forging process, the mold cavity should be continuously oiled and cooled to prevent the product from being embedded in the mold.

[0013] After the second forging, the workpiece is placed in the heating furnace to warm up to 480℃, and then the third forging is performed again.

[0014] The forging die comprises an upper die, a lower die, and an ejection part, the middle of the lower end of the upper die is provided with an arc-shaped groove communicating front and back, the middle of the arc-shaped groove is provided with a protrusion in the form of a groove profile of a left-right direction imitation overhanging wire clamp; the lower die is installed below the upper die, the middle of the lower die is provided with an arc-shaped protrusion in the front and back direction, the middle of the arc-shaped protrusion is provided with a groove in the form of a protrusion profile of a left-right direction imitation overhanging wire clamp, and the lowest end of the groove is provided with a ejection hole on both sides; the bottom of the lower end of the lower die is also designed with an ejection part, the ejection part comprises an ejection base plate, a lifting rod, a spring, and a supporting plate, the ejection base plate is installed at the lower end of the lower die, a rectangular hole is opened in the middle of the ejection base plate, the supporting plate is floatingly installed in the rectangular hole, the lifting rod is designed with two, the two lifting rods are installed on the upper surface of the supporting plate, the upper ends of the two lifting rods correspondingly extend into the two ejection holes of the lower die, and the upper ends of the two lifting rods are flush with the lowest end of the groove in the form of a protrusion profile of the imitation overhanging wire clamp; the lower end of the lower die is designed with four spring grooves, one spring is placed in each spring groove, one end of each spring is supported on the bottom of the spring groove, and the other end of the spring is supported on the upper surface of the supporting plate; the supporting plate comprises an upper supporting plate, a lower supporting plate, and a limiting guide bolt, the four corners of the upper supporting plate and the lower supporting plate are connected by fixed bolts, the two lifting rods are inserted on the upper surface of the upper supporting plate, and the lower ends of the lifting rods are supported on the upper surface of the lower supporting plate, the limiting guide bolt is designed with two, the limiting guide bolt comprises a bolt head, a screw rod, and a guide rod, the upper end of the bolt head is connected with the screw rod, the upper end of the screw rod is connected with the guide rod, and the lower end of the guide rod is annularly stepped with the upper end of the screw rod to form a ring, the lower die is designed with two guide grooves, the lower supporting plate is provided with two through holes, and the upper surface of the upper supporting plate is designed with two screw holes, the limiting guide bolt passes through the through hole of the lower supporting plate and then rotates through the screw hole of the upper supporting plate, and the guide rod at the top of the limiting guide bolt is correspondingly inserted into the guide groove of the lower die.

[0015] Two rectangular notches are formed on the two sides of the lower supporting plate, two rectangular grooves are formed on the two sides of the rectangular hole corresponding to the rectangular notches, one side of the rectangular groove is communicated with the inner side wall of the rectangular hole, and the lower end of the rectangular groove is communicated with the lower surface of the demolding bottom plate.

[0016] Two positioning through holes are formed on the upper surface of the upper supporting plate for the insertion of the top rod, a circular clamping groove is formed on the inner side of the lower end of the positioning through hole, the bottom of the top rod is provided with a upset circular cap, the upper end of the top rod passes through the positioning through hole, and the circular cap of the top rod is clamped in the circular clamping groove.

[0017] Four grooves are arranged at the four corners of the upper die, and four protrusions are arranged at the four corners of the lower die, and the four protrusions are matched with the four grooves.

[0018] The arc-shaped protrusions of the lower die are provided with a stand column close to the two sides, and the arc-shaped grooves of the upper die are provided with two through holes corresponding to the stand columns, the stand columns are slidably inserted into the through holes on the corresponding sides to be guided and matched; an annular boss is arranged on the bottom of the stand column, the arc-shaped protrusions of the lower die are provided with positioning through holes for the installation of the stand columns, an annular groove is formed at the lower end of the positioning through hole, the upper end of the stand column passes through the positioning through hole, and the annular boss at the lower end of the stand column is clamped in the annular groove.

[0019] When the forging die is demolded, the upper die moves upward to reset, the demolding part starts to act, the extension end of the ejecting cylinder or oil cylinder is arranged on the lower surface of the lower supporting plate, the lower ejecting cylinder or oil cylinder pushes the supporting plate with the top rod to move upward, the supporting force of the four springs is overcome, the guide rod of the limiting guide screw is guided in the guide groove, when the supporting plate is pushed to the position, the annular step of the limiting guide screw is arranged on the lower surface of the lower die to prevent the upward movement of the top rod, the top rod is arranged on the lower end of the workpiece, the workpiece is pushed out of the groove of the convex surface of the imitation overhanging line clamp, and the forged workpiece is taken out; the ejecting cylinder or oil cylinder is reset, and the supporting plate is reset downward under the action of the spring.

[0020] The advantages of the present application are: the process is perfect, the strength of the product after forging meets the product requirements through the three times of forging mode combined with the subsequent heat treatment process, and the service life of the forging die is prolonged by improving the forging die; the demolding bottom plate is designed in the demolding part, the rectangular hole for floating the supporting plate up and down is designed in the middle of the demolding bottom plate, so that the overall rigidity of the lower die is guaranteed, and deformation or cracking is not easy, the service life of the die is prolonged, and the product production demand is met; the supporting plate is designed as upper and lower supporting plates, the lower end of the ejector pin is directly inserted between the upper and lower supporting plates, without welding and nut fixing, the installation is extremely convenient, and the lower end of the ejector pin is designed as a round cap to prevent the ejector pin from falling off; the guide rod of the limiting guide bolt is designed in sliding fit with the guide groove of the lower die, so that the floating of the supporting plate up and down is stable, and interference is not generated, which is safe and reliable, and the annular step of the limiting guide bolt is designed to resist the outside of the guide groove, and the ejection limiting effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a three-dimensional schematic diagram of the present application Figure One .

[0022] Figure 2 is a three-dimensional schematic diagram of the present application Figure Two .

[0023] Figure 3 is a three-dimensional schematic diagram of the lower die of the present application.

[0024] Figure 4 is a top view schematic diagram of the lower die of the present application.

[0025] Figure 5 is a three-dimensional schematic diagram of the upper die of the present application.

[0026] Figure 6 is a vertical sectional view schematic diagram of the two ejector pins of the present application.

[0027] Figure 7 is a vertical sectional view schematic diagram of the two limiting guide bolts of the present application.

[0028] Figure 8 is a vertical sectional view schematic diagram of the two springs of the present application.

[0029] Figure 9 is a bottom view schematic diagram of the lower die of the present application.

[0030] Figure 10 is a schematic diagram of the demolding bottom plate of the demolding part of the present application.

[0031] Figure 11 is a three-dimensional schematic diagram of the overhanging wire clamp of the present application. DETAILED DESCRIPTION

[0032] Referring to the drawings Figures 1-11The invention discloses a kind of suspension clamp forging die, it includes upper die 1, lower die 2, stripping part 3, the middle of the lower end of the upper die 1 is provided with the arc-shaped recess 4 that is communicated in front and back, the protrusion 5 of recess profile of imitation suspension clamp in left and right direction is provided in the arc-shaped recess 4, the lower die 2 is installed in the lower of upper die 1, the middle of lower die 2 is provided with the arc-shaped protrusion 7 in front and back direction, the recess 9 of protrusion profile of imitation suspension clamp in left and right direction is provided in the middle of arc-shaped protrusion 7 and the lowest end of the recess is respectively provided with a ejection hole 8 in both sides position, the lower end of the lower die 2 bottom is also designed stripping part 3, the stripping bottom plate 31 of stripping part 3, ejector rod 32, spring 33, backing plate 34, stripping bottom plate 31 is installed in the lower end of lower die 2, the middle of stripping bottom plate 31 is opened with rectangular hole 311, backing plate 34 is installed in rectangular hole 311, the ejector rod 32 is designed with two, two ejector rod 32 is installed on the upper surface of backing plate 34, the upper end of two ejector rod 32 is respectively corresponded to be inserted into the two ejection holes 8 of lower die 2 and two ejector rod 32 is flush with the lowest end of the recess 9 of protrusion profile of imitation suspension clamp, the lower end of lower die 2 is designed with four spring grooves 26, one spring 33 is placed in each spring groove 26, one end of each spring 33 is supported on the bottom of spring groove 26 and the other end of spring 33 is supported on the upper surface of backing plate 34, the backing plate 34 includes upper backing plate 341, lower backing plate 342, limiting guide bolt 35, the four corners of upper backing plate 341 and lower backing plate 342 are locked and connected by fixed bolt 343, two ejector rod 32 is inserted on the upper surface of upper backing plate 341 and the lower end of ejector rod 32 is supported on the upper surface of lower backing plate 342, the limiting guide bolt 35 is designed with two, the limiting guide bolt 35 includes bolt head, screw rod and guide rod 351, the upper end of bolt head is connected with screw rod, the upper end of screw rod is connected with guide rod 351, the lower end of guide rod 351 is formed annular step 352 with the upper end of screw rod, the lower die 2 is designed with two guide grooves 22, the lower backing plate 342 is provided with two through holes, the upper surface of upper backing plate 341 is designed with two screw holes, the limiting guide bolt 35 is passed through the through hole of lower backing plate 342 and is rotated through the screw rod and passes through the screw hole of upper backing plate 341, the guide rod 351 of the top of limiting guide bolt 35 is correspondingly inserted into the guide groove 22 of lower die 2.

[0033] The two sides of lower backing plate 342 are respectively opened with two rectangular notches 3421, the two sides of rectangular hole 311 are also designed with two rectangular grooves 3111 corresponding to rectangular notch 3421, one side of rectangular groove 3111 is communicated with the inner side wall of rectangular hole 311, the lower end port of rectangular groove 3111 is communicated with the lower surface of stripping bottom plate 31, a rectangular block 36 is installed in each rectangular groove 3111, one end of rectangular block 36 is installed in rectangular groove 3111 and the other end of rectangular block 36 is inserted into rectangular hole 311, L-shaped step 361 is designed on the other end of rectangular block 36, rectangular block 36 is lifted in rectangular notch 3421 of lower backing plate 342 by L-shaped step 361.

[0034] The upper supporting plate 341 is designed with two positioning through holes for the insertion of the top rod 32, and a circular clamping groove 3411 is further designed inside the lower end of the positioning through hole; the bottom of the top rod 32 is designed with a upset circular cap 321; the upper end of the top rod 32 passes through the positioning through hole, and the circular cap 321 of the top rod 32 is clamped in the circular clamping groove 3411; and after the upper supporting plate 341 is fixedly connected with the lower supporting plate 342, the circular cap 321 is encapsulated in the circular clamping groove 3411.

[0035] The upper die 1 is provided with four recesses 11 at four corners, and the lower die 2 is provided with four protrusions 21 at four corners, which are mutually buckled and matched with the four recesses 11.

[0036] The arc-shaped protrusions of the lower die 2 are respectively provided with a stand 23 at positions close to two sides, and the arc-shaped recesses of the upper die 1 are correspondingly designed with two through holes inside; the stand 23 is slidingly inserted into the corresponding through hole for sliding guide matching. An annular boss 24 is designed around the bottom of the stand 23, and the arc-shaped protrusions of the lower die are designed with a positioning through hole for the installation of the stand; an annular groove 25 is designed at the lower end of the positioning through hole; the upper end of the stand 23 passes through the positioning through hole, and the annular boss 24 at the lower end of the stand is clamped in the annular groove 25.

[0037] A processing technology of a suspension clamp, the specific steps are as follows,

[0038] 1) First, heat the 6082 aluminum round material to 480-490℃ before hot forging, the heating should be uniform, and the heating time is 2-10 hours;

[0039] 2) The friction press is used to control the die forging during hot forging. The integral forging die is installed on the friction press, and the ejector cylinder or oil cylinder is installed on the upper surface of the machine tool corresponding to the lower end position of the demolding part of the friction press, which is used to push the top rod upward to place the heated round material in the recess of the protruding surface of the imitation suspension clamp of the lower die. The friction press controls the upper die to move downward, and the protrusions of the recess surface of the imitation suspension clamp of the upper die are extruded with the recess of the protruding surface of the imitation suspension clamp of the lower die. After the die is closed, the mold is opened, the upper die moves upward to reset, and the demolding part starts to work. The extension end of the ejector cylinder or oil cylinder is pushed against the lower surface of the lower supporting plate, the lower ejector cylinder or oil cylinder pushes the supporting plate upward with the top rod, overcomes the supporting force of the four springs, and at the same time, the guide rod of the limiting guide screw is guided in the guide groove. When the upper end is pushed to the position, the annular step of the limiting guide screw is pushed against the lower surface of the lower die to prevent the top from being pushed too much. The top rod is pushed against the lower end of the workpiece at two points, and the workpiece is pushed out of the recess 9 of the protruding surface of the imitation suspension clamp. After the workpiece is taken out after forging, the ejector cylinder or oil cylinder is reset, and the supporting plate is reset downward under the action of the spring. After the first piece is hot forged, the size, appearance, and whether the upper and lower dies are centered should be carefully checked. The die cavity should be continuously oiled and cooled during the forging process to prevent the product from being embedded in the die.

[0040] 3) After the first forging, the workpiece is placed in the heating furnace to wait for the temperature to reach 480℃, and then the second forging is performed again;

[0041] 4) After the forging is completed, the workpiece is deburred and polished;

[0042] 5) Heat treatment, send into the solid solution furnace, the solid solution temperature is set to 530℃, the holding time is 5h; then send into the aging furnace, the aging temperature is set to 180℃, the holding time is 10h;

[0043] 6) After heat treatment, the workpiece is subjected to surface shot blasting treatment, and the processing is completed. The product strength after forging is 8kN.

[0044] For the forging step, after the second forging, the workpiece is placed in the heating furnace to heat to 480℃, and then the third forging is performed again. The third forging can be performed after the second forging, and whether the third forging is needed is determined according to the size of the workpiece and the product strength after the later forging.

Claims

1. A process for manufacturing a suspension clamp, characterized in that The specific steps are as follows, 1) first, heat the 6082 aluminum round material to 480-490℃ before hot forging, the heating should be uniform, and the heating time is 2-10 hours; 2) when hot forging, the friction press is used to control the die forging, the heated round material is placed in the groove of the convex surface of the suspended line clamp of the lower die of the forging die, the friction press controls the lower movement of the upper die, the convex surface of the suspended line clamp of the upper die is extruded with the groove of the convex surface of the suspended line clamp of the lower die, the die is opened after the die is in place, the workpiece is ejected by the demolding part, and the workpiece is taken out; After the first hot forging, the size, appearance, and whether the upper and lower dies are centered of the workpiece should be carefully checked; 3) after one-time forging, the workpiece is placed in the heating furnace to wait for the temperature to reach 480℃, and then second-time forging is performed again; 4) after the forging is completed, the workpiece is deburred and burr-free, and then polishing processing is performed; 5) heat treatment, send into the solid solution furnace, the solid solution temperature is set to 530℃, the holding time is 5h; then send into the aging furnace, the aging temperature is set to 180℃, and the holding time is 10h; 6) after the heat treatment, the workpiece is subjected to surface shot blasting treatment, and the processing is completed; During the forging process, the die cavity should be continuously oiled and cooled; After the second-time forging, the workpiece is placed in the heating furnace to heat to 480℃, and then third-time forging is performed again; The forging die comprises an upper die, a lower die, and a demolding part, the middle of the lower end of the upper die is provided with an arc-shaped groove which is communicated front and back, the middle of the arc-shaped groove is provided with a convex of the groove surface of the suspended line clamp in the left-right direction; the lower die is installed below the upper die, the middle of the lower die is provided with an arc-shaped convex in the front-back direction, the middle of the arc-shaped convex is provided with a groove of the convex surface of the suspended line clamp in the left-right direction, and the lowest end of the groove is provided with a top hole on both sides; the bottom of the lower end of the lower die is further designed as a demolding part, the demolding part comprises a demolding bottom plate, a top rod, a spring, and a supporting plate, the demolding bottom plate is installed at the lower end of the lower die, a rectangular hole is opened in the middle of the demolding bottom plate, the supporting plate is floatingly installed in the rectangular hole, the top rod is designed as two, the two top rods are installed above the supporting plate, the upper ends of the two top rods are respectively inserted into the two top holes of the lower die, and the upper ends of the two top rods are flush with the lowest end of the groove of the convex surface of the suspended line clamp; the lower end of the lower die is designed with four spring grooves, one spring is placed in each spring groove, one end of each spring is topped on the bottom of the spring groove, and the other end of the spring is topped on the supporting plate; the supporting plate comprises an upper supporting plate, a lower supporting plate, and a limiting guide bolt, the four corners of the upper supporting plate and the lower supporting plate are locked and connected through fixing bolts, the two top rods are inserted into the upper supporting plate, and the lower ends of the top rods are topped on the lower supporting plate, the limiting guide bolt is designed as two, the limiting guide bolt comprises a bolt head, a screw rod, and a guide rod, the upper end of the bolt head is connected with the screw rod, the upper end of the screw rod is connected with the guide rod, and the lower end of the guide rod is annularly stepped with the upper end of the screw rod to form a ring, the lower die is designed with two guide grooves, the lower supporting plate is provided with two through holes, the upper supporting plate is designed with two screw holes, the limiting guide bolt passes through the through hole of the lower supporting plate and then rotates through the screw rod to pass through the screw hole of the upper supporting plate, and the guide rod of the top of the limiting guide bolt is correspondingly inserted into the guide groove of the lower die; Two rectangular notches are formed in the two side edges of the lower supporting plate, two rectangular grooves are formed in the two sides of the rectangular hole, one side of the rectangular groove is communicated with the inner side wall of the rectangular hole, and the lower end of the rectangular groove is communicated with the lower surface of the demolding bottom plate, a rectangular supporting block is installed in each rectangular groove, one end of the rectangular supporting block is installed in the rectangular groove, the other end of the rectangular supporting block extends into the rectangular hole, an L-shaped step is formed on the upper surface of the other end of the rectangular supporting block, and the rectangular supporting block is lifted in the rectangular notch of the lower supporting plate through the L-shaped step; Two positioning through holes are formed in the upper surface of the upper supporting plate for the insertion of the top rod, a circular clamping groove is formed in the inner side of the lower end of the positioning through hole, a thickened round cap is formed on the bottom of the top rod, the top rod passes through the positioning through hole, and the round cap of the top rod is clamped in the circular clamping groove; and the upper supporting plate is fixedly connected with the lower supporting plate, and the round cap is encapsulated in the circular clamping groove. Four grooves are formed in the four corners of the upper die, four protrusions are formed in the four corners of the lower die, and the four protrusions are matched with the four grooves. An arc-shaped protrusion is arranged on the lower surface of the lower die, an arc-shaped groove is arranged on the upper surface of the upper die, and a through hole is arranged in the inner side of the arc-shaped groove; a column is arranged on the arc-shaped protrusion, the column is slidably inserted into the through hole, and the column is guided by the through hole; an annular protrusion is arranged on the bottom of the column, a positioning through hole is arranged on the arc-shaped protrusion of the lower die, and an annular groove is formed in the lower end of the positioning through hole; the column passes through the positioning through hole, and the annular protrusion at the lower end of the column is clamped in the annular groove. When the die is demolded, the upper die moves upward, the demolding part starts to act, the extension end of the ejector cylinder or the oil cylinder is arranged on the lower surface of the lower supporting plate, the lower ejector cylinder or the oil cylinder pushes the supporting plate with the top rod upward, the supporting force of the four springs is overcome, the guide rod of the limiting guide bolt is guided in the guide groove, when the supporting plate is pushed upward to the position, the annular step of the limiting guide bolt is arranged on the lower surface of the lower die, so that the upper top is prevented from being excessively pushed, the top rod is arranged on the lower end of the workpiece, the workpiece is pushed out from the groove of the convex surface of the imitation overhanging line clamp, and the workpiece after forging is taken out; the ejector cylinder or the oil cylinder is reset, and the supporting plate is reset downward under the action of the spring.

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