Marine forging die

Abstract

The utility model relates to the technical field of forging dies, in particular to a forging die for a ship. The die comprises a base, a lower die is arranged at the middle end of the top of the base, an exhaust passage is used for exhausting air in a lower die cavity, and the defects that in the forging process, air in an inner cavity of the lower die cannot be exhausted, the inner cavity of the lower die cannot be completely filled with metal, forgings are lack of meat, incomplete in shape and the like, and the quality of the forgings is affected are overcome. When the upper die moves downwards, the piston rod and the piston are driven to move downwards in the guide hole, on one hand, horizontal movement of the upper die is limited, on the other hand, the piston moves downwards to extrude air to enable the air to fluctuate in the guide hole, and due to the fact that the exhaust passage is communicated with the guide hole, impurities in the exhaust passage are blown away, and the exhaust passage is kept unblocked. When the piston moves upwards in the guide hole, a local low-pressure area is formed below the piston, air around the exhaust passage is forced to flow into the guide hole after impurities are filtered out through the filter screen, and air in the inner cavity of the lower die is promoted to be exhausted.

Description

TECHNICAL FIELD

[0001] The utility model relates to forging die technical field, specifically, relate to a marine forging die. BACKGROUND

[0002] Forging die is widely used in aerospace, ship, automobile and other important fields, is a kind of tool that can make blank into die forging, is the key process equipment necessary in die forging production.

[0003] For the forging die, there are many existing technologies, for example:

[0004] Chinese patent application number CN222242465U discloses a kind of forging die of forging workpiece, including forging die, the forging die can be divided into two, still including pry tool, the pry tool includes pry lever, one side of the pry lever is bent and arranged, pry lever is fixedly provided with pry shaft at one end, pry lever is provided with support rod at the bent portion, one of the forging die is provided with stopper, the other forging die is provided with support block, support block is provided with clamping groove matched with support rod, the inside of the forging die is provided with casting groove, the forging die is provided with injection hole communicated with casting groove, the forging die is provided with exhaust hole communicated with casting groove, the inner diameter of the clamping groove is greater than the diameter of the support rod, the both ends of the support rod are provided with limit block, the diameter of the limit block is greater than the inner diameter of the clamping groove, the outer wall of the pry lever is installed with anti-skid sleeve.

[0005] The existing forging die is usually provided with exhaust hole to discharge air in lower die cavity when in use, but metal blank is exposed in air for a long time, and oxidation layer is formed on its surface, when these metal blanks with oxidation layer enter forging die for forging, oxidation layer will fall off under pressure, form impurity, easy to block exhaust hole, cause air in die cavity to be unable to discharge in time, make metal not completely fill die cavity, cause forging piece to appear lack of meat, shape is not complete and other defects, affect forging quality, in view of this, we propose a kind of marine forging die. UTILITY MODEL CONTENT

[0006] The utility model aims at solving the above-mentioned shortcomings, and provides a kind of marine forging die;

[0007] In order to achieve the above object, the utility model provides a marine forging die, including the base, the top middle end of base is provided with lower mould, the upside of lower mould is provided with upper mould, the both sides of lower mould are close to bottom and are provided with exhaust passage, the both sides edge between lower mould top and upper mould bottom is provided with positioning assembly, the positioning assembly includes the piston rod fixedly set in the both sides of upper mould bottom, the piston rod below slides and extends into the both sides inside of lower mould, the lower mould and piston rod junction is provided with the guide hole that supplies piston rod sliding, the piston rod bottom is fixedly provided with the piston, the piston is provided with the guide hole in sliding, the guide hole with below exhaust passage is linked together.

[0008] As further improvement of the technical scheme, the filter screen is arranged at the communication position between the exhaust passage and the guide hole, and the filter screen is fixedly connected with the lower mould.

[0009] As further improvement of the technical scheme, the length of the piston rod and the bottom structure is less than the length of the guide hole.

[0010] As further improvement of the technical scheme, the mounting plate is arranged below the base, the vertical column is fixedly arranged at the four ends between the base and the mounting plate, the material lifting assembly is symmetrically arranged at the bottom of the base, the two jacks are symmetrically and slidably arranged at the bottom of the base, the jacks penetrate through the base and extend into the inner cavity of the lower mould, and the top of the jacks is flush with the bottom of the inner cavity of the lower mould.

[0011] As further improvement of the technical scheme, the push plate is fixedly arranged at the bottom of the jack, and the air cylinder is fixedly arranged between the bottom of the push plate and the top of the mounting plate.

[0012] As further improvement of the technical scheme, the spring is arranged on the surface of the jack, and the spring is arranged between the base and the push plate.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] In the marine forging die, the air in the lower mould cavity is discharged through the exhaust passage, so that the air in the lower mould cavity can be discharged during the forging process, the metal cannot completely fill the lower mould cavity, the forging part has defects such as lack of meat and incomplete shape, and the quality of the forging part is affected; the piston rod and the piston are driven to move downward in the guide hole during the movement of the upper mould downward, on the one hand, the upper mould and the lower mould are guided and the horizontal movement of the upper mould is limited, and on the other hand, the piston moves downward and extrudes the air, so that the air generates fluctuation in the guide hole; since the exhaust passage is communicated with the guide hole, the impurities in the exhaust passage are blown away, the exhaust passage is kept unobstructed, when the piston moves upward in the guide hole, a local low-pressure area is formed below the piston, the surrounding air tends to flow to the area, the gas around the exhaust passage is forced to flow into the guide hole after the impurities are filtered through the filter screen, and the air in the lower mould cavity is discharged. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic view of the utility model;

[0016] Figure 2 It is the front view structure schematic view of the utility model;

[0017] Figure 3 It is the cross section structure schematic view of the utility model;

[0018] Figure 4 It is the lower mould cross section structure schematic view of the utility model;

[0019] Figure 5 It is the Figure 4 Enlarged structure schematic view of A place in the utility model.

[0020] The meaning of each reference numeral in the drawing is as follows:

[0021] 1, base; 11, mounting plate; 12, stand;

[0022] 2, lower mould; 21, exhaust passage; 22, guide hole; 23, filter screen;

[0023] 3, upper mould;

[0024] 4, positioning assembly; 41, piston rod; 42, piston;

[0025] 5, ejecting assembly; 51, ejecting rod; 52, push plate; 53, air cylinder; 54, spring. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Please refer to Figures 1-5 The embodiment provides a ship forging die, which comprises a base 1, the top middle end of the base 1 is provided with a lower mould 2, the upper side of the lower mould 2 is provided with an upper mould 3, the two sides of the lower mould 2 are provided with exhaust passages 21 close to the bottom;

[0028] A positioning assembly 4 is arranged between the top two side edges of the lower die 2 and the bottom two side edges of the upper die 3, and the positioning assembly 4 comprises piston rods 41 fixedly arranged at the bottom two sides of the upper die 3, which slide into the interior of the lower die 2 at the bottom two sides, and the lower die 2 is provided with guide holes 22 for the piston rods 41 to slide, and the piston rods 41 are fixedly provided with pistons 42 at the bottom, which slide in the guide holes 22, and the guide holes 22 are in communication with the exhaust passages 21 below;

[0029] The exhaust passages 21 are used for exhausting air in the cavity of the lower die 2, and the upper die 3 moves up and down to drive the piston rods 41 and the pistons 42 to move up and down in the guide holes 22, thereby guiding the lower die 2 and the upper die 3 and cleaning the exhaust passages 21.

[0030] The improvement of the embodiment is that the upper die 3 moves up and down to cooperate with the lower die 2 to forge the workpiece, the exhaust passages 21 are used for exhausting air in the cavity of the lower die 2, so that the air in the cavity of the lower die 2 can be exhausted during the forging process, the metal can completely fill the cavity of the lower die 2, the forged part is prevented from having defects such as lack of meat and incomplete shape, and the quality of the forged part is affected, the piston rods 41 and the pistons 42 are driven to move downward in the guide holes 22 during the downward movement of the upper die 3, the pistons 42 extrude air, the air generates fluctuations in the guide holes 22, the impurities in the exhaust passages 21 are blown away due to the communication between the exhaust passages 21 and the guide holes 22, the exhaust passages 21 are kept unobstructed, and a local low-pressure area is formed below the pistons 42 when the pistons 42 move upward in the guide holes 22, so that the surrounding air tends to flow to the area, and the gas around the exhaust passages 21 flows into the guide holes 22, thereby promoting the air in the cavity of the lower die 2 to be exhausted.

[0031] Considering that the metal blank is exposed to air for a long time, an oxide layer is formed on the surface of the metal blank, and when the metal blank with the oxide layer enters the forging die for forging, the oxide layer falls off under the action of pressure to form impurities, therefore, as Figures 3-5As shown, a filter screen 23 is installed at the connection between the exhaust channel 21 and the guide hole 22. The filter screen 23 is fixedly connected to the lower mold 2. When the upper mold 3 moves downward, it drives the piston rod 41 and piston 42 to move downward in the guide hole 22. The piston 42 compresses the air, causing the air to fluctuate within the guide hole 22. Since the exhaust channel 21 is connected to the guide hole 22, impurities in the exhaust channel 21 are blown away, keeping the exhaust channel 21 unobstructed. When the upper mold 3 drives the piston rod 41 and piston 42 to move upward in the guide hole 22, a local low-pressure area is formed below the piston 42, making... The surrounding air tends to flow towards this area. After impurities are filtered out by the filter screen 23, the gas around the exhaust channel 21 flows into the guide hole 22. The upward movement of the piston 42 helps to promote the exhaust of air from the inner cavity of the lower die 2, preventing the air from not being able to escape during the forging process, which would prevent the metal from completely filling the inner cavity of the lower die 2, resulting in defects such as missing material and incomplete shape in the forging, affecting the quality of the forging. At the same time, by setting the filter screen 23, it is prevented that when the piston 42 moves upward, the gas carries impurities into the guide hole 22 and accumulates on its inner wall, affecting the normal movement of the piston 42.

[0032] In forging, to prevent the piston rod 41 from interfering with the lower die 2 and the upper die 3, therefore, as Figures 1-5 As shown, the length of the piston rod 41 and the bottom structure is less than the length of the guide hole 22. When the lower mold 2 and the upper mold 3 are closed, the piston rod 41 is completely located inside the guide hole 22, and the bottom of the piston 42 is located at the filter screen 2. 3 At the top, ensure that the lower die 2 and the upper die 3 can close smoothly, and prevent the piston rod 41 from interfering with the movement of other structures and affecting the forging work.

[0033] Considering that during the forging process, the forging will be in close contact with the surface of the mold cavity, making it difficult to remove the forging, therefore, if Figures 1-5 As shown, a mounting plate 11 is provided directly below the base 1, and columns 12 are fixed at the four ends between the base 1 and the mounting plate 11. A top material assembly 5 is symmetrically provided at the bottom of the base 1. The top material assembly 5 includes two top rods 51 symmetrically slidably at the bottom of the base 1. The top rods 51 pass through the base 1 and extend into the inner cavity of the lower mold 2. The top of the top rods 51 is flush with the bottom of the inner cavity of the lower mold 2. After forging, the top rods 51 are moved upward to push the forging out of the inner cavity of the lower mold 2, replacing manual demolding. This helps the mold to enter the next forging cycle more quickly and increases the forging output per unit time.

[0034] To facilitate the movement of push rod 51 during its movement, therefore, as follows: Figures 1-5As shown, a push plate 52 is fixedly installed at the bottom of the push rod 51. A cylinder 53 is fixed between the bottom of the push plate 52 and the top of the mounting plate 11. When the push rod 51 needs to be moved upward, the cylinder 53 is activated to push the push plate 52 upward. Then, the mounting plate 11 drives the top push rod 51 to be lifted upward, pushing out the forging. When the cylinder 53 moves downward, it pulls the mounting plate 11 downward, so that the top push rod 51 on the top of the mounting plate 11 moves downward and returns to its position, preparing for the next ejection. This facilitates the up and down movement of the push rod 51 and is beneficial for subsequent ejection operations.

[0035] Considering that during the demolding process of the forging, the ejector pin 51 will generate a certain impact force when pushing the forging upward, therefore, if Figures 2-4 As shown, a spring 54 is provided on the surface of the push rod 51. The spring 54 is located between the base 1 and the push plate 52. When the push rod 51 is impacted and moves upward, the spring 54 will be compressed to buffer the instantaneous impact force, making the ejection process more stable and preventing the forging from being damaged by sudden force, thus ensuring the quality of the forging.

[0036] In practical use, the upper die 3 moves up and down in coordination with the lower die 2 to forge the workpiece. The exhaust channel 21 is used to expel air from the cavity of the lower die 2. During the up and down movement of the upper die 3, the piston rod 41 and piston 42 move up and down within the guide hole 22. When the piston 42 moves downward within the guide hole 22, it compresses the air, causing fluctuations within the guide hole 22. Since the exhaust channel 21 is connected to the guide hole 22, impurities in the exhaust channel 21 are blown away. When the piston 42 moves upward within the guide hole 22, a local low-pressure area is formed below the piston 42, causing the surrounding air to flow towards this area. This forces the gas around the exhaust channel 21 to flow into the guide hole 22 after being filtered for impurities by the filter screen 23. The upward movement of the piston 42 promotes the expulsion of air from the cavity of the lower die 2, preventing the air from failing to escape during the forging process, which would prevent the metal from completely filling the cavity of the lower die 2 and affecting the quality of the forging.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A marine forging die, comprising a base (1), characterized in that: The base (1) has a lower mold (2) at the top center, and an upper mold (3) is provided directly above the lower mold (2). Exhaust channels (21) are provided on both sides of the lower mold (2) near the bottom. A positioning component (4) is provided between the top two sides of the lower mold (2) and the bottom two sides of the upper mold (3). The positioning component (4) includes a piston rod (41) fixedly disposed on both sides of the bottom of the upper mold (3). The piston rod (41) slides into the lower mold (2) from the bottom. A guide hole (22) is provided at the connection between the lower mold (2) and the piston rod (41) for the piston rod (41) to slide. A piston (42) is fixedly disposed at the bottom of the piston rod (41). The piston (42) slides in the guide hole (22). The guide hole (22) is connected to the exhaust channel (21) below. Among them, the exhaust channel (21) is used to discharge the air in the cavity of the lower mold (2). The upper mold (3) moves up and down, driving the piston rod (41) and piston (42) to move up and down in the guide hole (22) to guide the lower mold (2) and the upper mold (3) and clean the exhaust channel (21).

2. The marine forging die according to claim 1, characterized in that: A filter screen (23) is provided at the connection between the exhaust channel (21) and the guide hole (22), and the filter screen (23) is fixedly connected to the lower mold (2).

3. The marine forging die according to claim 1, characterized in that: The length of the piston rod (41) and the bottom structure is less than the length of the guide hole (22).

4. The marine forging die according to claim 1, characterized in that: An installation plate (11) is provided directly below the base (1). Columns (12) are fixed at the four ends between the base (1) and the installation plate (11). A top material assembly (5) is symmetrically provided at the bottom of the base (1). The top material assembly (5) includes two top rods (51) symmetrically slidably at the bottom of the base (1). The top rods (51) pass through the base (1) and extend into the inner cavity of the lower mold (2). The top of the top rods (51) is flush with the bottom of the inner cavity of the lower mold (2).

5. The marine forging die according to claim 4, characterized in that: The bottom of the push rod (51) is fixedly provided with a push plate (52), and a cylinder (53) is fixedly provided between the bottom of the push plate (52) and the top of the mounting plate (11).

6. The marine forging die according to claim 5, characterized in that: A spring (54) is provided on the surface of the top rod (51), and the spring (54) is located between the base (1) and the push plate (52).

Images