Hot extrusion forming die for lower pipe seat of air-leg rock drill

Abstract

The utility model belongs to the technical field of production and processing, and discloses a hot extrusion forming die for a lower pipe seat of an air leg type rock drill, which aims to solve the technical problems in the processing of the lower pipe seat of the air leg type rock drill part in the prior art. An upper die is installed at the bottom of an upper base plate connected with a 400T press machine, a lower die is installed on a lower base plate, a punch is connected with the bottom of a punch base plate connected with a 315T press machine, and a drain plate is installed on a drain plate base plate. And then the workpiece is placed in a drain plate, a cylindrical hole of the workpiece is punched out through a punch, and then the formed workpiece blank is subjected to descaling and warehousing after being inspected to be qualified. A precision casting process is replaced by a hot extrusion process, so that the defects that the casting production cost is relatively high, the production period is long, the consumption of auxiliary materials is high and the environment is influenced are overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to production and processing technical field, concretely relates to a hot extrusion forming die of gas leg type rock drill lower pipe base. BACKGROUND

[0002] The traditional processing mode of the gas leg type rock drill part lower pipe base blank is to adopt casting process production, but in actual production, the following problems are found.

[0003] 1. The auxiliary material consumption is large in the process of casting production of the lower pipe base, the waste material has a greater influence on the environment, the waste material treatment and other fees are higher, and the production cost is higher.

[0004] 2. The casting process production of the lower pipe base is easy to cause defects such as part locking hole and sand eye, and the part strength is not high. The prior art cannot solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the technical problems existing in the prior art gas leg type rock drill part lower pipe base processing, and provides a hot extrusion forming die of gas leg type rock drill lower pipe base.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A hot extrusion forming die of gas leg type rock drill lower pipe base, comprising a hot extrusion die and a hot punching die;

[0008] The hot extrusion die comprises a 400T press slide block, a 400T press workbench, a top plate is connected to the bottom of the 400T press slide block, an upper die is arranged at the bottom of the top plate, a lower die is arranged on the 400T press workbench, an inner side upper part of the lower die is used for mounting a workpiece to be processed, a mold core is arranged on the inner side lower part of the lower die, the bottom of the mold core is in contact with a push rod, the bottom of the push rod extends out of the 400T press workbench and is connected with a top plate, pull rods are arranged on both sides of the top plate, and the pull rods pass through the 400T press workbench and are installed on the top plate through the top plate;

[0009] The hot punching die comprises a 315T press slide block and a 315T press workbench, a punch pad is arranged at the bottom of the 315T press slide block, a punch is arranged at the bottom of the punch pad, a leakage disc pad is arranged on the 315T press workbench, and a leakage disc is arranged on the leakage disc pad.

[0010] Further, a workpiece counterbore is arranged in the lower die, a second conical counterbore is arranged at the bottom of the workpiece counterbore, a hexagonal stepped hole is arranged at the bottom of the second conical counterbore, and a mold core hole is arranged at the bottom of the hexagonal stepped hole.

[0011] Further, the workpiece placing hole is arranged in the leakage disc, a first conical counterbore is arranged at the bottom of the workpiece placing hole, and a punch through hole is arranged at the bottom of the first conical counterbore.

[0012] Further, the bottom of the push rod is fastened and connected with the top plate through bolts, the top plate is connected with the pull rod through bolts, and the pull rod is connected with the upper backing plate through T-shaped slot screws and hexagonal nuts.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model discloses a hot extrusion die for manufacturing outer hexagonal stepped cylindrical hole workpiece, which comprises a lower die, an upper die, a punch, an upper backing plate and a leakage disc.

[0015] The utility model discloses a hot extrusion die for manufacturing outer hexagonal stepped cylindrical hole workpiece, which comprises a lower die, an upper die, a punch, an upper backing plate and a leakage disc.

[0016] The pull rod on the upper backing plate can slide along the guide hole of the lower backing plate, and when the upper die is moved downward under the power of the press machine for hot extrusion, the upper die and the lower die are contacted to make the die close, which can prevent the press machine error from causing the upper die and the lower die not to close and causing the forging size error.

[0017] The pull rod on the upper backing plate is connected with the top plate through bolts, and the installation and dismounting are relatively convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the hot extrusion die of the utility model.

[0019] Figure 2 It is a structure schematic view of the hot extrusion die of the utility model.

[0020] Figure 3 It is a structure schematic view of the lower die of the utility model.

[0021] Figure 4 It is the structure schematic view of the leakage disc of the utility model.

[0022] Figure 5 It is the three-dimensional view of the lower pipe base after punching of the utility model.

[0023] The meaning of the reference signs is as follows: 1. upper base plate; 2. pull rod; 3. inner hexagonal cylindrical head screw; 4. upper die; 5. T-shaped groove screw; 6. hexagonal nut; 7. lower die; 8. die core; 9. inner hexagonal cylindrical head bolt; 10. lower base plate; 11. punch through hole; 12. top plate; 13. first conical counterbore; 14. push rod; 15. 400T press slide; 16. 400T press workbench; 17. lower die; 18. 315T press slide; 19. punch base plate; 20. workpiece placing hole; 21. die core hole; 22. hexagonal stepped hole; 23. punch; 24. leakage disc; 25. second conical counterbore; 26. leakage disc base plate; 27. 315T press workbench; 28. workpiece counterbore. DETAILED DESCRIPTION

[0024] The utility model will be further explained in connection with the drawings and specific embodiments.

[0025] As Figures 1-4 shown, a hot extrusion forming die of a gas leg type rock drill lower pipe base is characterized by comprising a hot extrusion die and a hot punching die.

[0026] The hot extrusion die comprises a 400T press slide 15 and a 400T press workbench 16, the bottom of the 400T press slide 15 is provided with the upper base plate 1 through a bolt, the bottom of the upper base plate 1 is provided with the upper die 4 through an inner hexagonal cylindrical head screw 3, the 400T press workbench 16 is provided with the lower base plate 10 through an inner hexagonal cylindrical head bolt 9, the lower base plate 10 is provided with the lower die 7 through an inner hexagonal cylindrical head bolt 9, the lower die 7 is provided with the workpiece counterbore 28, the workpiece counterbore 28 is used for installing a workpiece 17 to be processed, the bottom of the workpiece counterbore 28 is provided with the second conical counterbore 25, the bottom of the second conical counterbore 25 is provided with the hexagonal stepped hole 22, the bottom of the hexagonal stepped hole 22 is provided with the die core hole 21, the die core hole 21 is provided with the die core 8, the bottom of the die core 8 is in contact with the push rod 14, the bottom of the push rod 14 extends out of the 400T press workbench 16 and is connected with the top plate 12 through a bolt, the two sides of the top plate 12 are provided with the pull rod 2 through a bolt, the pull rod 2 passes through the 400T press workbench 16 and is installed on the upper base plate 1 through a T-shaped groove screw 5 and a hexagonal nut 6 at the top.

[0027] The hot piercing die comprises a 315T press slide 18, a 315T press workbench 27, a punch pad 19 which is arranged at the bottom of the 315T press slide 18 through a T-shaped slot screw 5 and a hexagonal nut, a punch 23 which is arranged at the bottom of the punch pad 19 through an internal hexagonal cylindrical head screw 3, a leakage disc pad 26 which is arranged on the 315T press workbench 27 through a bolt, a leakage disc 24 which is arranged on the leakage disc pad 26 through a bolt, a workpiece placing hole 20 which is arranged in the leakage disc 24 and is used for placing a workpiece to be punched 171. A first tapered counterbore 13 is arranged at the bottom of the workpiece placing hole 20, and a punch through hole 11 is arranged at the bottom of the first tapered counterbore 13.

[0028] During work, a Ф80*45 bar (heated by a medium-frequency transparent furnace) is heated to a hot extrusion forming temperature of 1100-1200℃. Firstly, the bar is placed on the lower die 7, and under the action of the 400T press, the upper pad 1 is lowered, the upper die 4 is used to extrude the workpiece to be processed 17 (a lower pipe base blank bar), and the outer circle and outer hexagonal step of the anti-loose sleeve are formed once to form the workpiece to be punched 171.

[0029] Then the 400T press is raised, the upper pad 1 is raised, the top plate 12 and the push rod 14 are raised, the push rod 14 pushes out the extruded workpiece to be punched 171 from the lower die 7 through the lower die core 8, so as to prevent the hot extruded part from sticking to the lower die 7.

[0030] Then the workpiece to be punched 171 is placed in the leakage disc 24, the 315T press workbench works, the punch 23 is lowered, the punch 23 punches a round hole, and a lower pipe base part is obtained. Figure 5 ​

Claims

1. A hot extrusion forming die for the lower tube seat of a pneumatic rock drill, characterized in that: The utility model relates to a hot extrusion die and a hot piercing die. The hot extrusion die comprises a 400T press slide (15), a 400T press workbench (16), an upper backing plate (1) arranged at the bottom of the 400T press slide (15), an upper die (4) arranged at the bottom of the upper backing plate (1), a lower backing plate (10) arranged on the 400T press workbench (16), a lower die (7) arranged on the lower backing plate (10), an inner side upper portion of the lower die (7) used for mounting a workpiece (17) to be processed, a die core (8) arranged at the inner side lower portion of the lower die (7), the bottom of the die core (8) in contact with a push rod (14), the bottom of the push rod (14) extending out of the 400T press workbench (16) and connected with a top plate (12), pull rods (2) arranged at both sides of the top plate (12), and the pull rods (2) penetrating through the 400T press workbench (16) and mounted on the upper backing plate (1) at the top of the 400T press workbench (16). The hot piercing die comprises a 315T press slide (18), a 315T press workbench (27), a punch backing plate (19) arranged at the bottom of the 315T press slide (18), a punch (23) arranged at the bottom of the punch backing plate (19), a leakage disc backing plate (26) arranged on the 315T press workbench (27), and a leakage disc (24) arranged on the leakage disc backing plate (26), the leakage disc (24) being used for placing a workpiece (171) to be punched.

2. A hot extrusion die for forming a gas-leg drill bit base according to claim 1, wherein: A workpiece counterbore (28) is arranged in the lower die (7), a second conical counterbore (25) is arranged at the bottom of the workpiece counterbore (28), a hexagonal stepped hole (22) is arranged at the bottom of the second conical counterbore (25), and a die core hole (21) is arranged at the bottom of the hexagonal stepped hole (22).

3. A hot extrusion die for forming a down-the-hole hammer leg according to claim 2, characterized in that: A workpiece placing hole (20) is arranged in the leakage disc (24), a first conical counterbore (13) is arranged at the bottom of the workpiece placing hole (20), and a punch through hole (11) is arranged at the bottom of the first conical counterbore (13).

4. The hot extrusion forming die for the air-leg type rock drill lower tube seat according to claim 1, characterized in that: The bottom of the push rod (14) is connected with the top plate (12) through a bolt fastening connection, the top plate (12) is connected with the pull rod (2) through a bolt, and the pull rod (2) is connected with the upper backing plate (1) through a T-shaped slot screw (5) and a hexagonal nut (6).

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