Casting and forging integrated die-casting method
阅读说明:本技术 一种铸锻一体压铸方法 (Casting and forging integrated die-casting method ) 是由 程志强 于 2019-11-27 设计创作,主要内容包括:本发明适用于压力铸造技术领域,公开了一种铸锻一体压铸方法,包括以下步骤:将具有锻压孔和型腔的模具通过锁模装置固定于铸锻一体机的机架,并控制所述模具合模;挤压系统的挤压杆将熔融原料注满模具型腔和锻压孔;锻压系统的锻造杆将所述锻压孔的预存原料至少部分挤压至模具的型腔。本发明所提供的一种铸锻一体压铸方法,锻造系统在挤压系统完成后对产品进行高压锻造,使变形铝合金低速高压填充锻压模内的型腔,挤压过程空气有足够的时间排除,不会造成产品内部存在气孔又能使外观密度达到要求,使产品的性能大幅增加。(The invention is suitable for the technical field of pressure casting, and discloses a casting and forging integrated die-casting method, which comprises the following steps: fixing a die with a forging hole and a cavity on a frame of the casting and forging all-in-one machine through a die locking device, and controlling the die to be closed; the extrusion rod of the extrusion system fills the die cavity and the forging hole with the molten raw materials; and a forging rod of the forging system extrudes the pre-stored raw material of the forging hole to a cavity of the die at least partially. According to the casting and forging integrated die-casting method provided by the invention, the forging system performs high-pressure forging on a product after the extrusion system is finished, so that the deformed aluminum alloy is filled in a cavity in a forging die at low speed and high pressure, air is removed for enough time in the extrusion process, air holes in the product cannot be caused, the appearance density can meet the requirement, and the performance of the product is greatly improved.)
1. The casting and forging integrated die-casting method is characterized by comprising the following steps of:
fixing a die with a forging hole and a cavity on a frame of the casting and forging all-in-one machine through a die locking device, and controlling the die to be closed;
the extrusion rod of the extrusion system fills the die cavity and the forging hole with the molten raw materials;
and a forging rod of the forging system extrudes the pre-stored raw material of the forging hole to a cavity of the die at least partially.
2. A method of one-piece die casting according to claim 1 wherein said extrusion system includes a shot cylinder which continuously drives said extrusion stem at a set pressure to fill the die cavity and the forging holes with molten material.
3. A unitary die casting method as claimed in claim 2 wherein said second drive member drives a shot piston within a shot cylinder forwardly to a set position and a shot compressor cylinder maintains said shot cylinder at a constant pressure to cause said ram to fill the die cavity and the forging holes with molten material.
4. The method of claim 1, wherein the forging system comprises a forging cylinder, the first driving member drives a forging piston in the forging cylinder to move forward to a set position, a forging air tank instantaneously supplies compressed air to the forging cylinder, and the forging cylinder instantaneously pressurizes to enable the forging rod to forge the workpiece in the cavity.
5. The cast-forged one-piece die casting method according to claim 1, wherein the pressure of said forging bar acting on the material pre-stored in said forging hole is greater than the pressure of said extrusion bar acting on the material.
6. The cast-forged one-piece die casting method according to claim 1, wherein an instantaneous speed of said forging bar acting on the raw material pre-stored in said forging hole is larger than an extrusion speed of said extrusion bar acting on the raw material.
7. A cast-and-forged one-piece die casting method as claimed in claim 3, wherein said shot gas tanks are provided in one set, or wherein said shot gas tanks are provided in two sets, and wherein said two sets of gas tanks are operated simultaneously or alternately.
8. The cast-forged integrated die casting method according to claim 4, wherein said forging gas cylinders are provided in one set, or said forging gas cylinders are provided in two sets, and said two sets of said forging gas cylinders are operated simultaneously or alternately.
9. The method of die casting a cast-forged product according to claim 1, wherein the pressure and dwell time of said forging system are set before said forging system starts to operate.
10. The method of die casting a cast-forged product according to claim 1, wherein the number of operations of said forging system is set before said forging system starts operating.
Technical Field
The invention belongs to the technical field of pressure casting, and particularly relates to a casting and forging integrated die-casting method.
Background
At present, the die casting machine on the market can only use casting aluminum alloy, such as ADC12, 380 and other materials, if wrought aluminum alloy die casting products are used, the obtained products can have various defects, such as cracks, cold shut, sink and the like, simultaneously, because the wrought aluminum alloy can only be used on extrusion and forging.
In addition, the aluminum alloy parts cast by the prior common die casting machine have lower density and tensile strength, cannot meet the standard required by high strength of automobiles, and cannot be anodized.
In addition, the prior common die casting machine needs to use high-speed injection to ensure that the product has no defect on the appearance during die casting, and the workpiece can not be subjected to heat treatment because air holes and sand holes are inevitably generated inside the workpiece in the high-speed injection production process.
Disclosure of Invention
The present invention is directed to solve at least one of the above problems and provides a casting and forging integrated die-casting method, which includes the steps of
The technical scheme of the invention is as follows: a casting and forging integrated die-casting method comprises the following steps:
fixing a die with a forging hole and a cavity on a frame of the casting and forging all-in-one machine through a die locking device, and controlling the die to be closed;
the extrusion rod of the extrusion system fills the die cavity and the forging hole with the molten raw materials;
and a forging rod of the forging system extrudes the pre-stored raw material of the forging hole to a cavity of the die at least partially.
Specifically, the extrusion system includes a shot cylinder that continuously drives the ram at a set pressure to fill the die cavity and the forging holes with molten material.
Specifically, the second drive member drives the shot piston within the shot cylinder forwardly to a set position, and the shot compressor tank maintains the shot cylinder at a continuous pressure while the ram fills the die cavity and the forging holes with molten material.
Specifically, the forging system comprises a forging oil cylinder, a first driving part drives a forging piston in the forging oil cylinder to move forwards to a set position, a forging compressed air tank instantly fills compressed air into the forging oil cylinder, and the forging oil cylinder instantly pressurizes to enable a forging rod to forge a workpiece in a cavity.
Specifically, the pressure of the forging rod acting on the raw material prestored in the forging hole is greater than the pressure of the extrusion rod acting on the raw material.
Specifically, the instantaneous speed of the forging rod acting on the raw material prestored in the forging hole is greater than the extrusion speed of the extrusion rod acting on the raw material.
Specifically, the injection compressed gas tanks are provided with one group, or the injection compressed gas tanks are provided with two groups, and the two groups of the compressed gas tanks work synchronously or alternately.
Specifically, the forging compressed gas tank is provided with one group, or the forging compressed gas tank is provided with two groups, and the two groups of forging compressed gas tanks work synchronously or alternately.
Specifically, the pressure and dwell time of the forging system are set prior to the beginning of operation of the forging system.
Specifically, before the forging system starts to work, the working times of the forging system are set.
According to the casting and forging integrated die-casting method provided by the invention, after the extrusion system fills the die cavity with the molten raw materials, the forging rod acts to extrude at least part of the prestored raw materials to the die cavity of the die, so that the raw materials in the die cavity are further densified, the generation of air hole and sand hole in the workpiece is avoided, the workpiece is prevented from having defects such as cracks, cold shut, sink marks and the like, the performance of the product is greatly increased due to the forging effect of the forging rod, the density and the tensile strength of the product are high, and the standard of high strength requirements of automobiles can be achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic plan view of a cast-forging integrated die-casting machine according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a casting and forging integrated die-casting machine according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The casting and forging integrated die-casting method provided by the embodiment of the invention can adopt a casting and forging integrated die-casting machine shown in figures 1 and 2, and comprises the following steps: fixing a die with a forging hole and a cavity on a frame 1 of the casting and forging all-in-one machine through a die locking device, and controlling the die to be closed; the
Specifically, the
Specifically, the second drive member drives the
Specifically, the
Specifically, the pressure of the forging
Specifically, the instantaneous speed of the forging
Specifically, the shot compressed
Specifically, the forging
Specifically, before the forging system 30 (the cast-and-forged integral die casting machine) starts to work, the pressure and the dwell time of the
Specifically, before the forging system 30 (the cast-and-forge integral die-casting machine) starts to work, the number of times of working of the
When aluminum liquid is poured into the feeding port, the
In a specific application, the casting and forging integrated die-casting machine comprises a frame 1, wherein the frame 1 is provided with a
Specifically, the frame 1 has a die mounting position, and the
Or, the
Specifically, the forging drive part includes a forging cylinder 32, and the
Specifically, the forging cylinder 32 (in this embodiment, the cylinder for the
Specifically, the forging cylinder 32 is connected to a forging oil passage plate (in this embodiment, the oil passage plate is used for the
Specifically, the forging compressed
Specifically, the
Specifically, the extrusion cylinder has an
Specifically, the die is provided with a forging hole (spot-pressing hole), the forging
According to the casting and forging integrated die-casting method provided by the embodiment of the invention, the following steps can be referred to as an extrusion process:
a molding cavity, a pouring channel and a forging hole are formed in the die-casting die after die assembly,
the
The forging oil cylinder of the forging
The method can adopt wrought aluminum alloys (7075, 6061 and other commercial materials), mainly aims at the forming of high-strength wrought aluminum alloy materials, melts into liquid at a high temperature of 730-750 ℃, pours into a feeding cup, an extrusion system extrudes forwards at a high pressure of 0.1M/S to fill a cavity, a pouring gate and a forging hole of a forging die, and a product in the cavity of the die is forged by the forging system at a high pressure in a cooling process (generally, the time is delayed for 0.1S-1 second after the injection is finished, and the temperature of the product is about 600 ℃). The extrusion system is more than 3 times of the pressure of the injection system of the common die-casting machine, and can ensure enough continuous high pressure under the condition of not opening high speed so as to meet the requirement of forward extrusion at low speed and high pressure (the common die-casting machine does not open high speed injection pressure and does not have high pressure), the cavity in the forging die is filled with the deformed aluminum alloy at low speed and high pressure by extrusion, air in the extrusion process is discharged in enough time, air holes in the product can not exist, and the appearance density can not meet the requirement. The forging system carries out high-pressure forging to the product after the extrusion system is finished, and forging start-up time, dwell time and pressure can all be freely adjusted. The forging system requires the cooperation of a die having a forging function, and such a die is called a forging die. The forging system partially or wholly forges the product according to the die, and the forging depth of the product can be 0.5-1 mm. The forging is to make the density of the product reach the utmost and prevent the product from cracking and shrinkage during thermal shrinkage due to insufficient density. Thus, after the
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.
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