A hot forging die with oil injection nozzle

Abstract

The present invention relates to a hot forging die with an oil spray nozzle, comprising an upper die assembly, a lower die assembly and an extrusion assembly. Hot forging die grooves and extrusion head moving grooves are arranged on two opposite surfaces of the upper die assembly and the lower die assembly. The extrusion head moving groove is connected with one end or two opposite ends of the hot forging die groove. After the upper die assembly and the lower die assembly are closed, the two hot forging die grooves form a hot forging die cavity, and the two extrusion head moving grooves form an extrusion head moving cavity. The extrusion assembly is located on one side of the extrusion head moving groove. The extrusion assembly is powered by a hydraulic drive unit, and the extrusion head of the extrusion assembly moves in the extrusion head moving groove, and extrude the copper rod in the hot forging die groove into a hot forging die. The present invention has the advantages of basically no flash on the hot forging die after extrusion, high precision and high extrusion efficiency by arranging upper and lower die assemblies, and arranging the hot forging die cavity and the extrusion head moving cavity therein.

Description

Technical Field

[0001] The invention belongs to the technical field of extrusion dies, and in particular relates to a hot forging die with an oil spray nozzle. Background Art

[0002] In the production process of hot forging die blanks, the first step is to punch the cut and heated copper rods into shape through a punch press. However, the structural design of the existing punch press usually uses a cam to drive the punching rod to punch the copper rod, and the punching is performed by the mechanical force of the punch press. This will cause serious flash on the punched hot forging die blanks, and the interface of the hot forging die blanks will often appear elliptical. The production accuracy of the hot forging die blanks is poor. The above-mentioned stamping method will also result in serious waste of copper materials, and the subsequent machining will take a long time and be inefficient. Therefore, a hot forging stamping die was developed. However, due to the high temperature of the stamping environment of various hot forging stamping dies on the market, lubrication and cooling of the stamping surface of the die is particularly important. Therefore, a die frame that lubricates and cools the stamping surface of the die should be designed. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a hot forging die with an oil nozzle, which can basically ensure that there is no burr, high precision, high extrusion efficiency, and the oil nozzle can lubricate and cool the extrusion surfaces of the upper and lower dies.

[0004] The objective of the present invention is achieved through the following technical solution. The hot forging die with an oil nozzle comprises an upper die assembly, a lower die assembly and an extrusion assembly. Hot forging die grooves and extrusion head moving grooves are provided on two opposite surfaces of the upper die assembly and the lower die assembly. The extrusion head moving groove is connected to one end or two opposite ends of the hot forging die groove. After the upper die assembly and the lower die assembly are closed, the two hot forging die grooves form a hot forging die cavity, and the two extrusion head moving grooves form an extrusion head moving cavity. The extrusion assembly is located on one side of the extrusion head moving groove. The extrusion assembly is powered by a hydraulic drive unit, and the extrusion head of the extrusion assembly moves in the extrusion head moving groove, and extrude the copper rod in the hot forging die groove into a hot The forging die blank; the upper die assembly and the lower die assembly are both provided with a fuel injector mounting hole, and the fuel injectors are installed in the fuel injector mounting holes, and the fuel injectors are both facing the extrusion surface of the upper die frame and the extrusion surface of the lower die frame; the fuel injector comprises an outer cavity, a fuel injector head, a fuel injector head fixing block and a spring, the fuel injector head is limited at the opening at the upper end of the outer cavity, and one end of the fuel injector head extends out of the opening at the upper end of the outer cavity, and the other end is against the conical opening of the fuel injector head fixing block, the fuel injector head fixing block is located in the outer cavity, and the lower end surface of the lower channel of the fuel injector head fixing block is against the spring, and the spring is located in the outer cavity and presses the fuel injector head against the opening at the upper end of the outer cavity through the elastic tension of the spring.

[0005] The beneficial effects of the present invention are as follows: compared with the prior art, by setting up upper and lower die assemblies, and setting up a hot forging die blank cavity and an extrusion head moving cavity therein, the extrusion head on the extrusion assembly can directly slide back and forth through the extrusion head moving cavity and extrude the copper rod into a hot forging die blank; it has the advantages that the hot forging die blank after extrusion forming has basically no burrs, high precision and high extrusion efficiency; and by providing oil nozzle mounting holes on the upper and lower die assemblies, and installing oil nozzles in the oil nozzle mounting holes, the oil nozzles can achieve the effect of lubricating and cooling the extrusion surfaces of the upper and lower dies, that is, the oil nozzle installed in the upper die frame is used to spray oil on the lower die, and the oil nozzle installed in the lower die frame is used to spray oil on the upper die.

[0006] Preferably, the upper mold assembly includes an upper ejector block, an upper mold frame and an upper mold, the upper ejector block is connected to the upper mold and installed at the center of the upper mold frame, the hot forging die blank groove and the extrusion head moving groove are both opened on the clamping surface of the upper mold, and the upper mold frame is provided with an oil outlet hole and a guide post hole; the fuel nozzle mounting hole is arranged on the upper mold frame; through the arrangement of the above structure, it is convenient to clamp the mold with the lower mold assembly, and the fuel nozzle mounting hole and the guide post hole are provided on the upper mold frame. The arrangement of the fuel nozzle mounting hole makes the clamping and extrusion lubrication between the upper and lower mold assemblies better, and the guide post hole makes the clamping guiding between the upper and lower mold assemblies better.

[0007] Preferably, the lower mold assembly includes a lower ejector block, a lower mold frame and a lower mold, the lower ejector block is connected to the lower mold and installed at the center of the lower mold frame, the hot forging die blank groove and the extrusion head moving groove are both opened on the clamping surface of the lower mold, and the lower mold frame is provided with an oil outlet hole and a guide post hole; the fuel nozzle mounting hole is arranged on the upper mold frame; through the arrangement of the above structure, it is convenient to clamp the mold with the upper mold assembly, and the fuel nozzle mounting hole and the guide post hole are provided on the lower mold frame. The arrangement of the fuel nozzle mounting hole makes the clamping and extrusion lubrication between the upper and lower mold assemblies better, and the guide post hole makes the clamping guide between the upper and lower mold assemblies better.

[0008] Preferably, the extrusion assembly includes an extrusion head, a limit block and a slider, one end of the extrusion head is inserted and limited on the limit block, and the other end of the extrusion head is movable in the extrusion head moving groove; the limit block is mounted and fixed on the slider, and the slider is fixedly connected to the driving end of the hydraulic drive unit; through the arrangement of the above structure, the disassembly and assembly between each other is more convenient, the fine-tuning of the gap or spacing is more convenient, and the replacement of the extrusion head or the limit block is more convenient.

[0009] Preferably, one end of the extrusion head is provided with a limit base, and the limit block that is plugged into the limit base is provided with a limit groove, and one end of the extrusion head is fixed in the limit groove on the limit block through the limit base; through the setting of the above structure, by changing the size of the limit base, the distance that the extrusion head enters the extrusion head moving groove can be adjusted, so that hot forging die blanks of different sizes can be extruded.

[0010] Preferably, an adjusting rod that can guide the injection direction of the nozzle head is plugged into the injection port of the nozzle head; by plugging in the adjusting rod, the nozzle head can be freely rotated through the adjusting rod, and the nozzle head can realize the injection requirements of various positions through the adjusting rod, and the injection requirements can be realized more evenly, and the requirements of different molds for graphite oil can be realized by adjusting the size of the through hole of the nozzle head.

[0011] Preferably, the outer cavity includes a first outer cavity and a second outer cavity, the upper end of the first outer cavity is provided with an opening for limiting the nozzle head, the lower end of the first outer cavity is provided with an internal thread, and the upper end of the second outer cavity is provided with an external thread, the second outer cavity and the first outer cavity are fixed by a threaded connection, and one end of the spring is abutted against the nozzle head fixing block, and the other end of the spring is abutted against the upper end of the second outer cavity; through the arrangement of the above structure, the disassembly and assembly of the outer cavity is more convenient, and the replacement of various components is also more convenient.

[0012] Preferably, an O-ring is installed at the lower end of the second outer cavity, and an oil hole is opened in the axial center of the second outer cavity, which is communicated with the first outer cavity and the lower channel of the injector head fixing block; by providing the O-ring, the injector can play a sealing role when it is connected to the external oil inlet pipe through the second outer cavity.

[0013] Preferably, the fuel injection nozzle mounting holes are all arranged at the four end corners of the upper mold frame and the lower mold frame; this can meet the fuel injection requirements of various positions of the upper and lower mold frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the hot forging die base mold of the present invention.

[0015] Figure 2 It is a structural schematic diagram between the extrusion assembly and the lower die assembly of the present invention.

[0016] Figure 3 It is a schematic diagram of the structure between the extrusion head and the limiting block of the present invention.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the extrusion head of the present invention.

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the limit block of the present invention.

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the upper mold frame of the present invention.

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the lower mold frame of the present invention.

[0021] Figure 8 It is a schematic diagram of the main cross-sectional structure of the fuel injection nozzle of the present invention.

[0022] The numbers in the accompanying drawings are: 100, upper die assembly; 200, lower die assembly; 300, extrusion assembly; 400, hot forging die base groove; 500, extrusion head moving groove; 600, oil outlet hole; 700, guide post hole; 800, fuel injection nozzle; 900, fuel injection nozzle mounting hole; 101, upper ejector block; 102, upper die frame; 103, upper die; 201, lower ejector block; 202, lower die frame; 203, lower die; 301, extrusion head; 302, limit block; 303, slider ; 304, limiting base; 305, limiting groove; 801, outer cavity; 802, nozzle head; 803, nozzle head fixing block; 804, spring; 805, opening; 806, adjusting rod; 807, O-ring; 801-1, first outer cavity; 801-2, second outer cavity; 801-3, internal thread; 801-4, external thread; 801-5, oil hole; 802-1, injection port; 803-1, tapered opening; 803-2, lower channel. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings: Figures 1 to 8 As shown, the present invention includes an upper die assembly 100, a lower die assembly 200 and an extrusion assembly 300. A hot forging die base groove 400 and an extrusion head moving groove 500 are provided on two opposite surfaces of the upper die assembly 100 and the lower die assembly 200. The extrusion head moving groove 500 is connected to one end or two opposite ends of the hot forging die base groove 400. After the upper die assembly 100 and the lower die assembly 200 are closed, the two hot forging die base grooves 400 form a hot forging die base cavity, and the two extrusion head moving grooves 500 form an extrusion head moving cavity; the extrusion assembly 300 is located on one side of the extrusion head moving groove 500. The extrusion assembly 300 is powered by a hydraulic drive unit, and the extrusion head 301 of the extrusion assembly 300 moves in the extrusion head moving groove 500, and extrude the copper rod in the hot forging die base groove 400 into a hot forging die base. The upper mold frame 102 and the lower mold frame 202 are both provided with a nozzle mounting hole 900, and the nozzle mounting hole 900 is installed with a nozzle 800. The nozzle 800 is oriented toward the extrusion surface of the upper mold frame 102 and the extrusion surface of the lower mold frame 202. The nozzle 800 includes an outer cavity 801, a nozzle head 802, a nozzle head fixing block 803 and a spring 804. The nozzle head 802 is limited at the opening 805 at the upper end of the outer cavity 801, and the nozzle head 80 One end of the nozzle 2 extends out of the opening 805 at the upper end of the outer cavity 801, and the other end abuts against the tapered opening 803-1 of the nozzle head fixing block 803. The nozzle head fixing block 803 is located within the outer cavity 801. The lower end surface of the lower channel 803-2 of the nozzle head fixing block 803 abuts against the spring 804. The spring 804 is located within the outer cavity 801 and, through the elastic tension of the spring 804, presses the nozzle head 802 against the opening 805 at the upper end of the outer cavity 801. The above-mentioned hot forging die base is a pipe die base or a valve body die base.

[0024] The hot forging die can be one-out-one or one-out-two or more. If it is one-out-one, the hot forging die cavity is set to one, and the extrusion head moving cavity is also one or two. When one is set, it is the forming extrusion of the L-shaped elbow. When two are set and symmetrically distributed one to one, it is the forming extrusion of the three-way pipe. If it is one-out-two, the hot forging die cavity is set to two, and the extrusion head moving cavity is also two or four. When two are set and located on the same side, it is the forming extrusion of the L-shaped elbow. When four are set and symmetrically distributed in pairs, it is the forming extrusion of the three-way pipe.

[0025] The upper mold assembly 100 includes an upper ejector block 101, an upper mold frame 102 and an upper mold 103. The upper ejector block 101 is connected to the upper mold 103 and is installed at the center of the upper mold frame 102. The hot forging die blank groove 400 and the extrusion head moving groove 500 are both opened on the clamping surface of the upper mold 103, and the upper mold frame 102 is provided with an oil outlet hole 600 and a guide column hole 700, and the injector nozzle mounting hole 900 is set on the upper mold frame 102.

[0026] The lower die assembly 200 includes a lower ejector block 201, a lower die frame 202 and a lower die 203. The lower ejector block 201 is connected to the lower die 203 and is installed at the center of the lower die frame 202. The hot forging die base groove 400 and the extrusion head moving groove 500 are both opened on the clamping surface of the lower die 203, and the lower die frame 202 is provided with an oil outlet hole 600 and a guide column hole 700, and the injector nozzle mounting hole 900 is set on the lower die frame 202.

[0027] The extrusion assembly 300 includes an extrusion head 301, a limit block 302 and a slider 303. One end of the extrusion head 301 is inserted and limited on the limit block 302, and the other end of the extrusion head 301 moves in the extrusion head moving groove 500; the limit block 302 is installed and fixed on the slider 303, and the slider 303 is fixedly connected to the driving end of the hydraulic drive unit.

[0028] One end of the extrusion head 301 is provided with a limiting base 304, and a limiting groove 305 is provided on the limiting block 302 that is plugged into the limiting base 304. One end of the extrusion head 301 is fixed in the limiting groove 305 on the limiting block 302 through the limiting base 304.

[0029] An adjustment rod 806 is inserted into the fuel injection port 802 - 1 of the fuel injection nozzle head 802 to guide the fuel injection direction of the fuel injection nozzle head 802 .

[0030] The outer cavity 801 includes a first outer cavity 801-1 and a second outer cavity 801-2. The upper end of the first outer cavity 801-1 is provided with an opening 805 for limiting the nozzle head 802. The lower end of the first outer cavity 801-1 is provided with an internal thread 801-3. The upper end of the second outer cavity 801-2 is provided with an external thread 801-4. The second outer cavity 801-2 is fixed to the first outer cavity 801-1 by a threaded connection, and one end of the spring 804 is against the nozzle head fixing block 803, and the other end of the spring 804 is against the upper end of the second outer cavity 801-2.

[0031] An O-ring 807 is installed at the lower end of the second outer cavity 801-2, and an oil hole 801-5 is opened in the axial center of the second outer cavity 801-2, which is connected to the first outer cavity 801-1 and the lower channel 803-2 of the nozzle head fixing block 803.

[0032] The fuel injection nozzle mounting holes 900 are all provided at the four corners of the upper mold frame 102 and the lower mold frame 202 .

[0033] The working principle of the present invention is as follows: first, the assembled fuel injector 800 is installed in the fuel injector mounting hole 900 of the upper mold frame 102 and the lower mold frame 202, and the adjusting rod 806 is inserted into the fuel injection port 802-1 of the fuel injector head 802 of the fuel injector 800, and the fuel injection direction of the fuel injector head 802 is driven by the rotation of the adjusting rod 806. After the adjusting rod 806 is adjusted, the fuel injection port 802-1 of the fuel injector head 802 can be pulled out; then, the copper rod is cut into sections and heated, and the heated copper rod is placed into the hot forging die blank groove 400 of the lower mold 203 by a robot, the upper and lower mold assemblies are closed, and the extrusion head 301 is squeezed into the extrusion head moving cavity by the driving end of the hydraulic drive unit, and is squeezed with the copper rod and formed into a hot forging die blank; finally, the upper and lower mold assemblies are separated, the hot forging die blank is adsorbed on the upper mold 103, and the hot forging die blank is pushed down by the ejector pin.

[0034] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A hot forging die with an oil spray nozzle, comprising an upper die assembly (100), a lower die assembly (200) and an extrusion assembly (300), characterized in that: The upper die assembly (100) and the lower die assembly (200) are provided with a hot forging die base groove (400) and an extrusion head moving groove (500) on two opposite surfaces, and the extrusion head moving groove (500) is connected to one end or two opposite ends of the hot forging die base groove (400). After the upper die assembly (100) and the lower die assembly (200) are closed, the two hot forging die base grooves (400) form a hot forging die base cavity, and the two extrusion head moving grooves (500) form an extrusion head moving cavity; the extrusion assembly (300) is located on one side of the extrusion head moving groove (500), the extrusion assembly (300) is powered by a hydraulic drive unit, and the extrusion head (301) of the extrusion assembly (300) moves in the extrusion head moving groove (500) and extrude the copper rod in the hot forging die base groove (400) into a hot forging die base; the upper die assembly (100) and the lower die assembly (200) are both provided with a fuel injection nozzle mounting hole (900), and a fuel injection nozzle (801) is installed in the fuel injection nozzle mounting hole (900). 0), the fuel injection nozzle (800) is oriented toward the extrusion surface of the upper mold assembly (100) and the extrusion surface of the lower mold assembly (200); the fuel injection nozzle (800) comprises an outer cavity (801), a fuel injection nozzle head (802), a fuel injection nozzle head fixing block (803) and a spring (804); the fuel injection nozzle head (802) is limited at an opening (805) at the upper end of the outer cavity (801), and one end of the fuel injection nozzle head (802) extends out of the opening (805) at the upper end of the outer cavity (801); The other end abuts against the conical opening (803-1) of the nozzle head fixing block (803); the nozzle head fixing block (803) is located in the outer cavity (801); the lower end surface of the lower channel (803-2) of the nozzle head fixing block (803) abuts against the spring (804); the spring (804) is located in the outer cavity (801) and the nozzle head (802) is pressed against the opening (805) at the upper end of the outer cavity (801) by the elastic tension of the spring (804).

2. The hot forging die with oil spray nozzle according to claim 1, characterized in that: The upper die assembly (100) comprises an upper ejector block (101), an upper die frame (102) and an upper die (103); the upper ejector block (101) is connected to the upper die (103) and is mounted at the center of the upper die frame (102); the hot forging die base groove (400) and the extrusion head moving groove (500) are both provided on the mating surface of the upper die (103); and the upper die frame (102) is provided with an oil outlet hole (600) and a guide column hole (700); and the oil nozzle mounting hole (900) is provided on the upper die frame (102).

3. The hot forging die with oil spray nozzle according to claim 2, characterized in that: The lower die assembly (200) comprises a lower ejector block (201), a lower die frame (202) and a lower die (203); the lower ejector block (201) is connected to the lower die (203) and is mounted at the center of the lower die frame (202); the hot forging die base groove (400) and the extrusion head moving groove (500) are both provided on the die joint surface of the lower die (203); and the lower die frame (202) is provided with an oil outlet hole (600) and a guide column hole (700); and the oil nozzle mounting hole (900) is provided on the lower die frame (202).

4. The hot forging die with oil spray nozzle according to claim 1, characterized in that: The extrusion assembly (300) comprises an extrusion head (301), a limit block (302) and a slider (303); one end of the extrusion head (301) is inserted and limited on the limit block (302), and the other end of the extrusion head (301) is movable in the extrusion head moving groove (500); the limit block (302) is mounted and fixed on the slider (303), and the slider (303) is fixedly connected to the driving end of the hydraulic drive unit.

5. The hot forging die with oil spray nozzle according to claim 4, characterized in that: A limiting base (304) is provided at one end of the extrusion head (301), a limiting groove (305) is provided on the limiting block (302) that is plugged and limited with the limiting base (304), and one end of the extrusion head (301) is fixed in the limiting groove (305) on the limiting block (302) through the limiting base (304).

6. The hot forging die with oil spray nozzle according to claim 1, characterized in that: An adjustment rod (806) capable of guiding the oil injection direction of the oil injection nozzle head (802) is inserted into the oil injection port (802-1) of the oil injection nozzle head (802).

7. The hot forging die with oil spray nozzle according to claim 1, characterized in that: The outer cavity (801) comprises a first outer cavity (801-1) and a second outer cavity (801-2); the upper end of the first outer cavity (801-1) is provided with an opening (805) for limiting the position of the fuel injection nozzle (802); the lower end of the first outer cavity (801-1) is provided with an internal thread (801-3); the upper end of the second outer cavity (801-2) is provided with an external thread (801-4); the second outer cavity (801-2) and the first outer cavity (801-1) are fixed by screwing; one end of the spring (804) is against the fuel injection nozzle fixing block (803); and the other end of the spring (804) is against the upper end of the second outer cavity (801-2).

8. The hot forging die with oil spray nozzle according to claim 7, characterized in that: An O-ring (807) is installed at the lower end of the second outer cavity (801-2), and an oil hole (801-5) is opened at the axial center of the second outer cavity (801-2), which is communicated with the first outer cavity (801-1) and the lower channel (803-2) of the nozzle head fixing block (803).

9. The hot forging die with oil spray nozzle according to claim 3, characterized in that: The fuel injection nozzle mounting holes (900) are all arranged at the four end corners of the upper mold frame (102) and the lower mold frame (202).

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