CN111069563B - Metal casting mold and method for manufacturing aluminum bronze explosion-proof hammer - Google Patents
Metal casting mold and method for manufacturing aluminum bronze explosion-proof hammer Download PDFInfo
- Publication number
- CN111069563B CN111069563B CN202010023335.0A CN202010023335A CN111069563B CN 111069563 B CN111069563 B CN 111069563B CN 202010023335 A CN202010023335 A CN 202010023335A CN 111069563 B CN111069563 B CN 111069563B
- Authority
- CN
- China
- Prior art keywords
- explosion
- cavity
- aluminum bronze
- mold
- proof hammer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2272—Sprue channels
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
Abstract
The invention relates to a metal casting mold for manufacturing an aluminum bronze explosion-proof hammer, which comprises a horizontally-split upper half mold and a horizontally-split lower half mold; an upper casting mold half cavity is arranged on the upper half mold, a lower casting mold half cavity corresponding to the upper casting mold half cavity is correspondingly arranged on the lower half mold, an upper half core is arranged at the center of the top surface of the upper casting mold half cavity, and a lower half core is arranged at the center of the bottom surface of the lower casting mold half cavity; an exhaust passage is arranged on the parting surface of the upper half mould and the lower half mould on the outer side of the explosion-proof hammer head cavity; an upper pressure head is arranged on the upper half; a material storage cavity is arranged in the center of the lower half mold, and a lower pressure head is arranged at the bottom of the material storage cavity; and a runner is arranged between the material storage cavity and the lower casting half cavity. The invention also relates to a method for manufacturing the aluminum bronze explosion-proof hammer by using the metal casting mold, which aims to solve the problems of low density, large structure and easy jumping block in the process of producing the aluminum bronze explosion-proof hammer by the existing casting technology.
Description
Technical Field
The invention relates to the field of manufacturing of explosion-proof tools, in particular to a metal casting mold and a method for manufacturing an aluminum bronze explosion-proof hammer.
Background
The aluminum bronze explosion-proof hammer is a special tool used in inflammable and explosive environment, and does not produce tiny metal particles and sparks when the hammer head of the hammer head impacts with an object. The existing manufacturing method of the aluminum bronze explosion-proof hammer head comprises three major types of combination of casting, forging and casting-forging, wherein the casting of the aluminum bronze explosion-proof hammer head is to use sand mould to pour and solidify under the gravity condition, and the problems of low density, rough surface and large size fluctuation generally exist; the aluminum bronze explosion-proof hammer forging is that an aluminum bronze bar is plastically deformed within a forging temperature range to obtain an explosion-proof hammer blank, and then the explosion-proof hammer blank is processed and formed. The method has long process flow, needs the working procedures of heating, pre-forging, final forging, edge cutting and the like, needs large tonnage of equipment, and has high rejection rate due to easy occurrence of cracks during forging because of the limitation of plasticity of the material of the explosion-proof hammer head; the preparation method of the explosion-proof hammer head combined with casting and forging is that a blank with a similar shape is firstly prepared by a sand casting method, and then die forging forming is carried out by a die forging machine.
The invention patent with application publication number CN1038229 discloses a method for producing an aluminum bronze explosion-proof tool by utilizing a die casting process, which is characterized in that the process parameters are a die casting specific pressure of 60-85MPa, a casting speed of 25-32m/s, a casting temperature of 950-. The speed is too high, and air holes are easily formed by air entrainment; the pressure is low, and the obtained hammer head has low density. The application of extrusion casting in an explosion-proof hand tool in the treatise on Hongchun chapter designs an explosion-proof octagonal hammer extrusion casting die, and gives out the characteristic process parameters of liquid forging of the die forging of 150MPa, the casting temperature of 1100-. But the special-shaped concave-convex mould is directly pressurized, interference is easily formed in the matching relation between the special-shaped concave-convex mould during working, the friction force is huge, the effective pressure acting on metal is obviously reduced, and the working reliability of a mould spring subjected to floating pressurization is low at high temperature, so that a compact and complete explosion-proof hammer cannot be obtained.
Disclosure of Invention
The invention aims to provide a metal casting mold for manufacturing an aluminum bronze explosion-proof hammer and a manufacturing method of the aluminum bronze explosion-proof hammer, which aim to solve the problems of low density, large structure and easy jumping block in use in the production of the aluminum bronze explosion-proof hammer by the existing casting technology and simultaneously solve the problem of high rejection rate caused by easy cracking of the aluminum bronze explosion-proof hammer produced by the existing forging or casting and forging combined technology.
The invention adopts the following technical scheme:
a metal casting mold for manufacturing an aluminum bronze explosion-proof hammer comprises a horizontally-split upper half mold and a lower half mold; an upper casting half cavity is arranged on the upper half mould, a lower casting half cavity corresponding to the upper casting half cavity is correspondingly arranged on the lower half mould, and an explosion-proof hammer head cavity is formed after the upper casting half cavity and the lower casting half cavity are closed; an upper half core is arranged at the center of the top surface of the upper casting mold half cavity, a lower half core is arranged at the center of the bottom surface of the lower casting mold half cavity, the upper half core and the lower half core are frustum-shaped, and conical tops are relatively combined to form a conical hammer eye core; an exhaust passage is arranged on the parting surface of the upper half mould and the lower half mould on the outer side of the explosion-proof hammer head cavity; the upper half mould is provided with a cylindrical upper pressure head which is communicated with the upper casting mould half cavity; a material storage cavity is arranged in the center of the lower half mold, and a cylindrical lower pressure head is arranged at the bottom of the material storage cavity; and a runner is arranged between the material storage cavity and the lower casting half cavity.
In the metal casting mold, the upper half core is shorter than the lower half core by 3-5 mm.
In the metal casting mold, the exhaust passage is provided with a plurality of exhaust passages, the exhaust passages are uniformly arranged on the parting surface of the outer side of the explosion-proof hammer head cavity, and the depth of the exhaust passages is 0.15-0.3 mm.
In the metal casting mold, each explosion-proof hammer head cavity is connected with two runners, and the two runners are respectively arranged at two sides of the hammer eye core.
In the metal casting mold, upper pressure heads are symmetrically arranged on two sides of each upper casting mold half cavity, which are positioned on the upper half core.
In the metal casting mold, the number of the explosion-proof hammer head cavities is 4-12, and the explosion-proof hammer head cavities are centrosymmetric and uniformly distributed by taking the material storage cavity as the center.
A method for manufacturing an aluminum bronze explosion-proof hammer by using the metal mold comprises the following steps:
(1) smelting the aluminum bronze alloy to obtain aluminum bronze alloy liquid;
(2) closing the mold and locking the mold: pouring aluminum bronze alloy liquid into a material storage cavity of the lower half mold under the action of gravity for 2-5 seconds, closing the upper half mold and the lower half mold, pressurizing and locking, wherein the applied pressure (N) is not less than the total horizontal projection area (mm) of all explosion-proof hammer head cavities2）×（90~170）（MPa）；
(3) Pressurizing and solidifying: pushing the aluminum bronze alloy liquid in the storage cavity by using the lower pressure head within 1-3 seconds after the mold locking pressure is added to a set value, enabling the alloy liquid to enter each explosion-proof hammer cavity through a flow channel, increasing the pressure to enable the internal pressure of the aluminum bronze alloy liquid to reach 155-170 MPa, maintaining the pressure for 1-10 seconds, applying downward pressure to the aluminum bronze alloy liquid by using the upper pressure head to enable a high pressure of 160-200 MPa to be locally formed below the upper pressure head for feeding, and keeping the pressure when the bottom surface of the upper pressure head is flush with the top surface of the explosion-proof hammer cavity until the aluminum bronze alloy liquid is completely solidified to obtain an aluminum bronze explosion-proof hammer blank with a pouring channel and a material cake;
(4) cutting off excess materials: the lower pressure head moves upwards to separate the explosion-proof hammer head from the pouring channel and eject out the pouring channel, the material cake and the aluminum bronze explosion-proof hammer head blank;
(5) finishing and heat treatment: and carrying out heat treatment on the aluminum bronze explosion-proof hammer blank, and polishing to obtain the aluminum bronze explosion-proof hammer.
In the method, the aluminum bronze alloy comprises the following components in percentage by mass: 5.5 to 8.0% of Ni, 5.1 to 6.5% of Fe and the balance of Cu.
In the method, the smelting temperature in the step (1) is 1200-1400 ℃. Preferably 1200 deg.c.
In the method, the pouring temperature in the step (2) is 950-1090 ℃. Preferably 1050 deg.c.
In the method, the pressurizing and locking pressure (N) in the step (2) is not less than the total area (mm) of the horizontal projection of each explosion-proof hammer cavity2）×170（MPa）。
The invention has the beneficial effects that:
(1) the hammerhead is formed under high pressure, the density of the hammerhead is high, the crystal grains are uniform and fine, and the density can be improved to 8.17g/cm3Meanwhile, the common defects of shrinkage cavity and looseness in casting are avoided;
(2) the liquid aluminum bronze metal is directly solidified and formed in the cavity without excessive plastic deformation, so that the liquid aluminum bronze metal has no cracking defect;
(3) the inclination directions of the upper half core and the lower half core of the hammer eye core are opposite, and the section of the middle part of the hammer eye formed after butt joint is the smallest, so that the hammer handle can be prevented from falling off; the upper half core is 3-5mm shorter than the lower half core, so that a workpiece is kept on the lower die when the die is opened, and the workpiece is convenient to discharge;
(4) the metal mold is formed, and the formed blank has high surface smoothness and high dimensional precision;
(5) the upper pressure head and the lower pressure head are both cylindrical, the fit clearance between the upper pressure head and the through hole is easy to control uniformly, and interference fit is avoided, so that the effective pressure applied to the molten metal is high;
(6) the die has multiple cavities, indirect pressurizing and filling, direct pressurizing and feeding, strong adaptability to the shape complexity of the hammer head, high production efficiency and wide application range;
(7) cutting processing is not needed, and the material utilization rate is high;
(8) the process has less excess materials. The process yield reaches more than 80 percent;
(9) although the aluminum bronze material described has a high iron and nickel content, the magnetic properties are weak because the material solidifies under high pressure, the iron phase transforms into a non-magnetic austenitic iron phase, and there is no spark on impact.
Drawings
FIG. 1 is a schematic sectional view of a metal mold according to the present invention.
FIG. 2 is a schematic view of the lower half structure.
Fig. 3 is a schematic structural diagram of the aluminum bronze explosion-proof hammer head.
Wherein, 1 upper half mould, 2 lower half mould, 3 upper mould half cavity, 4 lower mould half cavity, 5 upper half core, 6 lower half core, 7 parting surface, 8 exhaust passage, 9 upper pressure head, 10 material storage cavity, 11 lower pressure head, 12 flow channel, 13 mandril and 14 hammer eyes.
Detailed Description
The present invention is further described with reference to several embodiments, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and the present invention shall be covered thereby.
Example 1
A metal mold for manufacturing an aluminum bronze explosion-proof hammer comprises a horizontally-split upper half mold 1 and a lower half mold 2; an upper casting mold half cavity 3 is arranged on the upper half mold 1, a lower casting mold half cavity 4 corresponding to the upper casting mold half cavity 3 is correspondingly arranged on the lower half mold 2, and an explosion-proof hammer head cavity is formed after the upper casting mold half cavity 3 and the lower casting mold half cavity 4 are closed.
The metal casting mold is made of hot-work grinding tool steel and is horizontally divided, and the parting surfaces of the upper half mold and the lower half mold are positioned on the horizontal central plane of the aluminum bronze explosion-proof hammer head.
An upper half core 5 is arranged at the center of the top surface of the upper casting mold half cavity 3, a lower half core 6 is arranged at the center of the bottom surface of the lower casting mold half cavity 4, and the upper half core 5 and the lower half core 6 are frustum-shaped and have conical tops which are relatively combined to form a hammer eye core. The upper half core 5 is 3-5mm shorter than the lower half core 6. The upper half core and the lower half core are made of H13 steel, the inclination directions of the upper half core and the lower half core are opposite, and the upper half core and the lower half core are in butt joint to form a hammer eye with the smallest middle section and large two end sections so as to prevent the hammer handle from loosening and falling off.
And the bottom of the lower casting mold half cavity is provided with ejector rods 13, the ejector rods 13 are symmetrically arranged on two sides of the lower half core and are connected with an ejection device, the ejection device can adopt a hydraulic cylinder, and when the casting mold is finished and the blank needs to be ejected, the hydraulic cylinder drives the ejector rods to move upwards so as to eject the blank out of the explosion-proof hammer head cavity.
And an exhaust passage 8 is arranged on the parting surface 7 of the upper half type 1 and the lower half type 2 at the outer side of the explosion-proof hammer head cavity. The exhaust passage 8 is provided with a plurality of exhaust passages which are uniformly arranged at the outer side of the explosion-proof hammer head cavity.
An upper pressure head 9 is arranged on the upper half mould 1, and the upper pressure head 9 is communicated with the upper casting mould half cavity 3; a material storage cavity 10 is arranged in the center of the lower half mold 2, and a lower pressure head 11 is arranged at the bottom of the material storage cavity 10; a runner 12 is arranged between the material storage cavity 10 and the lower casting mold half cavity 4. Every two runners 12 are connected to the explosion-proof hammer head die cavity, two runners 12 set up respectively in the both sides of hammer eye core. The lower pressure head can move up and down at the bottom of the storage cavity, so that the volume of the storage cavity is changed to provide pressure, the metal casting mold adopts a lower pressure head to pressurize and indirectly fill the mold, and the upper pressure head and the lower pressure head are used for feeding and solidifying the pressure.
In the metal casting mold, upper pressure heads 9 are symmetrically arranged on two sides of each upper casting mold half cavity 3, which are positioned on the upper half core 5. The number of the explosion-proof hammer head cavities is 4-12 and the explosion-proof hammer head cavities are centrosymmetric by taking the material storage cavity 10 as a center.
The upper pressure head is cylindrical, the diameter of the upper pressure head is 16.0mm, the length of the upper pressure head is 40.0mm, a through hole is formed in the upper casting mold half cavity, the upper pressure head penetrates through the through hole, the upper pressure head is driven by the upper hydraulic press to move up and down in the through hole and apply downward pressure to the aluminum bronze alloy liquid.
The lower pressure head is cylindrical, has a diameter of 139.0mm and a length of 85.0mm, is arranged at the bottom end of the storage cavity, can be directly used as the bottom surface of the storage cavity, can move up and down under the drive of the hydraulic machine to change the size of the storage cavity, presses alloy liquid into the explosion-proof hammer head cavity from the storage cavity, and simultaneously provides pressure.
Example 2
A method for manufacturing an aluminum bronze explosion-proof hammer using the metal mold of example 1, comprising the steps of:
(1) smelting the aluminum bronze alloy to obtain aluminum bronze alloy liquid; the aluminum bronze alloy comprises the following components in percentage by mass: 5.5% of Ni, 5.1% of Fe and the balance of Cu; the melting temperature is 1200 ℃.
(2) Closing the mold and locking the mold: and (3) pouring the aluminum bronze alloy liquid into the material storage cavity of the lower half mold by gravity for 2-5 seconds, closing the upper half mold and the lower half mold, pressurizing and locking, wherein the pouring temperature is 1200 ℃. The applied pressure (N) is more than or equal to the horizontal projection area (mm) of the whole cavity2) X 90 (MPa); the pressurizing, locking and die assembly is to directly compress the upper and lower dies by utilizing pressurizing equipment. The pressurizing equipment is a hydraulic press, the nominal force of a main cylinder is 6000 kN, the upper extrusion cylinder is 3500kN, and the lower extrusion cylinder is 3500 kN.
(3) Pressurizing and solidifying: and pushing the aluminum bronze alloy liquid in the storage cavity by using the lower pressure head within 1-3 seconds after the mold locking pressure is added to a set value, enabling the alloy liquid to enter an explosion-proof hammer cavity through a flow channel, increasing the pressure to enable the internal pressure of the aluminum bronze alloy liquid to reach 155MPa, keeping the pressure for 1-5 seconds, applying downward pressure to the aluminum bronze alloy liquid by using the upper pressure head, enabling a high pressure of 160MPa to be locally formed below the upper pressure head for feeding, and statically keeping the pressure when the bottom surface of the upper pressure head is flush with the top surface of the explosion-proof hammer cavity until the aluminum bronze alloy liquid is completely solidified to obtain an aluminum bronze explosion-proof hammer blank with a pouring channel and a material cake.
(4) Cutting off excess materials: and the lower pressure head and the ejector rod move upwards simultaneously to eject the aluminum bronze explosion-proof hammer blank with the pouring channel and the material cake, the aluminum bronze explosion-proof hammer blank is transferred to a punching work part, the pouring channel and the material cake are separated from the aluminum bronze explosion-proof hammer blank by using a punching machine, and the aluminum bronze explosion-proof hammer blank is subjected to heat treatment.
(5) Finishing and heat treatment: and carrying out heat treatment on the beryllium bronze explosion-proof hammer blank, and polishing to obtain the aluminum bronze explosion-proof hammer.
Example 3
A method for manufacturing an aluminum bronze explosion-proof hammer using the metal mold of example 1, comprising the steps of:
(1) smelting the aluminum bronze alloy to obtain aluminum bronze alloy liquid; the aluminum bronze alloy comprises the following components in percentage by mass: 8.0% of Ni, 6.5% of Fe and the balance of Cu; the melting temperature is 1300 ℃.
(2) Closing the mold and locking the mold: and (3) pouring the aluminum bronze alloy liquid into the material storage cavity of the lower half mold by gravity for 2-5 seconds, closing the upper half mold and the lower half mold, pressurizing and locking, wherein the pouring temperature is 1200 ℃. The applied pressure (N) is more than or equal to the horizontal projection area (mm) of the whole cavity2）×160（MPa）。
(3) Pressurizing and solidifying: and pushing the aluminum bronze alloy liquid in the storage cavity by using the lower pressure head within 1-3 seconds after the mold locking pressure is added to a set value, enabling the alloy liquid to enter an explosion-proof hammer cavity through a flow channel, increasing the pressure to enable the internal pressure of the aluminum bronze alloy liquid to reach 160MPa, maintaining the pressure for 1-10 seconds, applying downward pressure to the aluminum bronze alloy liquid by using the upper pressure head, enabling the part below the upper pressure head to form 200MPa high pressure for feeding, and statically maintaining the pressure when the bottom surface of the upper pressure head is flush with the top surface of the explosion-proof hammer cavity until the aluminum bronze alloy liquid is completely solidified to obtain an aluminum bronze explosion-proof hammer blank with a pouring channel and a material cake.
(4) Cutting off excess materials: and the lower pressure head and the ejector rod move upwards simultaneously to eject the aluminum bronze explosion-proof hammer blank with the pouring channel and the material cake, the aluminum bronze explosion-proof hammer blank is transferred to a punching work part, the pouring channel and the material cake are separated from the aluminum bronze explosion-proof hammer blank by using a punching machine, and the aluminum bronze explosion-proof hammer blank is subjected to heat treatment.
(5) Finishing and heat treatment: and carrying out heat treatment on the beryllium bronze explosion-proof hammer blank, and polishing to obtain the aluminum bronze explosion-proof hammer.
Example 4
A method for manufacturing an aluminum bronze explosion-proof hammer using the metal mold of example 1, comprising the steps of:
(1) smelting the aluminum bronze alloy to obtain aluminum bronze alloy liquid; the aluminum bronze alloy comprises the following components in percentage by mass: 7.0% of Ni, 6.0% of Fe and the balance of Cu; the melting temperature is 1400 ℃.
(2) Closing the mold and locking the mold: and (3) pouring the aluminum bronze alloy liquid into the material storage cavity of the lower half mold by gravity for 2-5 seconds, closing the upper half mold and the lower half mold, pressurizing and locking, wherein the pouring temperature is 1200 ℃. The applied pressure (N) is more than or equal to the horizontal projection area (mm) of the whole cavity2）×170（MPa）。
(3) Pressurizing and solidifying: and pushing the aluminum bronze alloy liquid in the storage cavity by using the lower pressure head within 1-3 seconds after the mold locking pressure is added to a set value, enabling the alloy liquid to enter an explosion-proof hammer cavity through a flow channel, increasing the pressure to enable the internal pressure of the aluminum bronze alloy liquid to reach 170MPa, maintaining the pressure for 1-10 seconds, applying downward pressure to the aluminum bronze alloy liquid by using the upper pressure head, enabling a part below the upper pressure head to form 170MPa high pressure for feeding, and statically maintaining the pressure when the bottom surface of the upper pressure head is flush with the top surface of the explosion-proof hammer cavity until the aluminum bronze alloy liquid is completely solidified to obtain an aluminum bronze explosion-proof hammer blank with a pouring channel and a material cake.
(4) Cutting off excess materials: and the lower pressure head and the ejector rod move upwards simultaneously to eject the aluminum bronze explosion-proof hammer blank with the pouring channel and the material cake, the aluminum bronze explosion-proof hammer blank is transferred to a punching work part, the pouring channel and the material cake are separated from the aluminum bronze explosion-proof hammer blank by using a punching machine, and the aluminum bronze explosion-proof hammer blank is subjected to heat treatment.
(5) Finishing and heat treatment: and carrying out heat treatment on the beryllium bronze explosion-proof hammer blank, and polishing to obtain the aluminum bronze explosion-proof hammer.
Examples of effects
The performance test results of the aluminum bronze explosion-proof hammer heads prepared in examples 2 to 4 are shown in table 1.
TABLE 1 Performance test
In example 2, under the holding pressure of 155MPa and the feeding pressure of 160MPa, the crystal grains of the formed part are refined, the density is improved, and the hardness and the tensile strength are correspondingly increased; because no casting riser is arranged and the runner has compact structure, the processing excess material is less, the process yield is high and can reach 88 percent.
In example 3, the contents of Ni 8.0% and Fe 6.5% are moderately increased to facilitate the refinement of crystal grains, and the hardness, tensile strength and density of the product are increased under the pressure of 160MPa and 200 MPa.
In example 4, the dwell pressure was 170MPa, the feeding pressure was 170MPa, the pressure was further increased, and the grain size and the structure of the molded article were refined and dense, thereby increasing the hardness and the tensile strength.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method for manufacturing an aluminum bronze explosion-proof hammer is characterized in that the aluminum bronze explosion-proof hammer is formed by utilizing a metal casting mold;
the metal casting mold comprises an upper half mold (1) and a lower half mold (2) which are horizontally divided; an upper casting mold half cavity (3) is arranged on the upper half mold (1), a lower casting mold half cavity (4) corresponding to the upper casting mold half cavity (3) is correspondingly arranged on the lower half mold (2), and an explosion-proof hammer head cavity is formed after the upper casting mold half cavity (3) and the lower casting mold half cavity (4) are closed; an upper half core (5) is arranged at the center of the top surface of the upper casting mold half cavity (3), a lower half core (6) is arranged at the center of the bottom surface of the lower casting mold half cavity (4), the upper half core (5) and the lower half core (6) are frustum-shaped, and conical tops are relatively combined to form a conical hammer eye core; an exhaust passage (8) is arranged on a parting surface (7) of the upper half mould (1) and the lower half mould (2) at the outer side of the explosion-proof hammer head cavity; an upper pressure head (9) is arranged on the upper half mould (1), and the upper pressure head (9) is communicated with the upper casting mould half cavity (3); a material storage cavity (10) is arranged in the center of the lower half mold (2), and a lower pressure head (11) is arranged at the bottom of the material storage cavity (10); a runner (12) is arranged between the material storage cavity (10) and the lower casting mold half cavity (4);
which comprises the following steps:
(a) smelting the aluminum bronze alloy to obtain aluminum bronze alloy liquid;
(b) closing the mold and locking the mold: pouring aluminum bronze alloy liquid into a material storage cavity of the lower half mold within 2-5 seconds, closing the upper half mold and the lower half mold, pressurizing and locking, wherein the applied pressure is more than or equal to X (90-170) MPa of the horizontal projection area of the cavity of the explosion-proof hammer head; the unit of the pressure is N, and the unit of the horizontal projection total area of the explosion-proof hammer cavity is mm2；
(c) Pressurizing and solidifying: pushing the aluminum bronze alloy liquid in the storage cavity by using a lower pressure head within 1-3 seconds after the mold locking pressure is added to a set value, enabling the alloy liquid to enter an explosion-proof hammer cavity through a flow channel, increasing the pressure to enable the internal pressure of the aluminum bronze alloy liquid to reach 155-170 MPa, maintaining the pressure for 1-10 seconds, applying downward pressure to the aluminum bronze alloy liquid by using an upper pressure head to enable a high pressure of 160-200 MPa to be locally formed below the upper pressure head for feeding, and statically maintaining the pressure when the bottom surface of the upper pressure head is flush with the top surface of the explosion-proof hammer cavity until the aluminum bronze alloy liquid is completely solidified to obtain an aluminum bronze explosion-proof hammer blank with a pouring channel and a material cake;
(d) cutting off excess materials: the lower pressure head moves upwards to separate the explosion-proof hammer head from the pouring channel and eject out the pouring channel, the material cake and the aluminum bronze explosion-proof hammer head blank;
(e) finishing and heat treatment: and carrying out heat treatment on the aluminum bronze explosion-proof hammer blank, and polishing to obtain the aluminum bronze explosion-proof hammer.
2. A method of manufacturing an aluminium bronze bursting hammer as claimed in claim 1 in which the upper half core (5) is 3 to 5mm shorter than the lower half core (6).
3. The method for manufacturing the aluminum bronze explosion-proof hammer according to claim 1, wherein the exhaust passages (8) are uniformly arranged outside the explosion-proof hammer head cavity.
4. The method for manufacturing the aluminum bronze explosion-proof hammer according to claim 1, wherein each explosion-proof hammer head cavity is connected with two flow passages (12), and the two flow passages (12) are respectively arranged on two sides of the hammer eye core.
5. A method of manufacturing an aluminium bronze bursting hammer as claimed in claim 1 in which each of the upper mould half cavities (3) is symmetrically provided with upper rams (9) on either side of the upper core half (5).
6. The method for manufacturing the aluminum bronze explosion-proof hammer according to claim 1, wherein the number of the explosion-proof hammer head cavities is 4-12, and the explosion-proof hammer head cavities are centrosymmetric around the storage cavity (10).
7. The method for manufacturing the aluminum bronze explosion-proof hammer according to claim 1, wherein the aluminum bronze alloy comprises the following components in percentage by mass: 5.5 to 8.0% of Ni, 5.1 to 6.5% of Fe and the balance of Cu.
8. The method for manufacturing the aluminum bronze explosion-proof hammer according to claim 1, wherein the melting temperature of the step (a) is 1200-1400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010023335.0A CN111069563B (en) | 2020-01-09 | 2020-01-09 | Metal casting mold and method for manufacturing aluminum bronze explosion-proof hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010023335.0A CN111069563B (en) | 2020-01-09 | 2020-01-09 | Metal casting mold and method for manufacturing aluminum bronze explosion-proof hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111069563A CN111069563A (en) | 2020-04-28 |
| CN111069563B true CN111069563B (en) | 2021-09-07 |
Family
ID=70322610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010023335.0A Active CN111069563B (en) | 2020-01-09 | 2020-01-09 | Metal casting mold and method for manufacturing aluminum bronze explosion-proof hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111069563B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996776B (en) * | 2021-12-14 | 2024-05-03 | 邢书明 | Device and method for non-solid die forging grinding ball |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60102259A (en) * | 1983-11-09 | 1985-06-06 | Honda Motor Co Ltd | High pressure solidifying and casting device |
| CN110340327A (en) * | 2019-08-20 | 2019-10-18 | 湖北庚联耐磨材料科技有限公司 | Alloy bar production method based on Quench and liquid forging |
-
2020
- 2020-01-09 CN CN202010023335.0A patent/CN111069563B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60102259A (en) * | 1983-11-09 | 1985-06-06 | Honda Motor Co Ltd | High pressure solidifying and casting device |
| CN110340327A (en) * | 2019-08-20 | 2019-10-18 | 湖北庚联耐磨材料科技有限公司 | Alloy bar production method based on Quench and liquid forging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111069563A (en) | 2020-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102756108B (en) | Semi-solid extruding and casting molding mould of compressor crankshaft and molding process | |
| JP4348750B2 (en) | Powder molding apparatus and driving method thereof | |
| CN111112576B (en) | Method for manufacturing beryllium bronze explosion-proof hammer | |
| CN101954469B (en) | Manufacturing method of bucket teeth and die used by same | |
| CN104708291A (en) | Method for precise extrusion forming of iron pedestal for railway switch | |
| CN111069563B (en) | Metal casting mold and method for manufacturing aluminum bronze explosion-proof hammer | |
| CN106180643B (en) | The extrusion casting method of casting | |
| JP2016216772A (en) | Method for producing metal material combining metal laminate molding and plastic working | |
| CN106735047A (en) | A kind of aluminium ingot die-casting process method | |
| CN207577367U (en) | A kind of mold | |
| CN105081275A (en) | Method for preparing graded pressurization liquid forging aluminum alloy engine cylinder cover | |
| CN107020360A (en) | A kind of high-intensity magnetic field die casting machine | |
| CN115041636B (en) | Extrusion casting forming die for magnesium alloy hub | |
| CN206614024U (en) | A kind of magnesium alloy hub liquid forging mould | |
| JP5801783B2 (en) | Split dice | |
| CN206952133U (en) | A kind of squeeze casting mould of frame-type casting | |
| CN113102537B (en) | Complete die suitable for labor-saving forming of large-size thin-wall conical shell | |
| CN112658226B (en) | Unequal-thickness deep cavity shell type aluminum alloy component extrusion casting device and using method thereof | |
| CN2892325Y (en) | Aluminium alloy linking liquid die forging metal mould cavity structure | |
| CN204638848U (en) | A kind of high accuracy blanking die | |
| CN210523784U (en) | Gravity die casting device | |
| US2369299A (en) | Apparatus for working metals | |
| DE202021001848U1 (en) | Device for pressure-assisted vertical gravity casting (DVSG) of metallic materials | |
| RU115261U1 (en) | MULTI-LOCAL PRESS FORM FOR PRESSING POWDERS | |
| TWM517032U (en) | Improved structure of vertical bidirectional multi-action forging module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |