CN209811205U - A liquid die forging die device for a scroll blank for an automobile air-conditioning compressor - Google Patents

Abstract

The utility model discloses a liquid die forging die device for a scroll blank for an automobile air-conditioning compressor, which comprises a punch, a die arranged under the punch and matched with the punch, a plurality of dies arranged on the punch and The upper ejector rod whose top end is connected to the upper cylinder and a plurality of lower ejector rods which are arranged on the die and whose bottom end is connected with the lower oil cylinder, the plurality of upper ejector rods are respectively inserted into the corresponding upper ejector rod holes of the punch and The rod hole is a coaxial clearance fit structure. The upper parts of multiple lower ejector rods are respectively inserted into the lower ejector rod holes corresponding to the die and are coaxial with the lower ejector rod holes. The gap between the upper ejector rod and the upper ejector rod hole is The clearance between the lower ejector pin and the hole of the lower ejector pin is E2, and the clamping clearance between the punch and die is E3. The utility model uses the exhaust channels formed by E1, E2 and E3 to make the product free from pore inclusion defects, has high precision and smoothness, and solves the problem of low precision and smoothness of products obtained by traditional aluminum alloy liquid die forging.

Description

A liquid die forging die device for a scroll blank for an automobile air-conditioning compressor

technical field

The utility model relates to the field of manufacturing scroll blanks for automobile air-conditioning compressors, in particular to a liquid die forging die device for scroll blanks for automobile air-conditioning compressors.

Background technique

Due to the relatively complex structure of the scroll for automotive air-conditioning compressors, forging is not easy to achieve. When traditional gravity casting and low-pressure casting are used, defects such as pores and inclusions are more likely to occur, which will affect the forming quality of the scrolls for automotive air-conditioning compressors. . Liquid die forging is a non-cutting process between casting and forging. It belongs to a precision forming manufacturing technology of casting and forging. When using liquid die forging to process scrolls for automotive air-conditioning compressors, compared with traditional gravity casting, In terms of low-pressure casting, the forming quality of scrolls for automotive air-conditioning compressors is better.

The main process of liquid die forging is: pouring a certain amount of alloy liquid into the mold, filling the cavity with the alloy liquid under the pressure of the punch, and then undergoing crystallization solidification, pressure feeding and plastic deformation. The liquid die forging process is a method of applying high mechanical pressure to the liquid metal poured into the mold to eliminate casting defects and produce certain plastic deformation when it solidifies, so as to obtain high-quality parts. It is an advanced process with labor-saving, energy-saving and high material utilization. The mechanical properties of the workpiece are high, which can approach or reach the level of forgings of the same alloy.

It can be seen from the above process that the mold used in the process of aluminum alloy liquid die forging is very important. If there is a problem in the design of the mold, all the products produced are likely to be waste products. How to optimize the liquid forging die to achieve high precision and smoothness of aluminum alloy products is a problem that needs to be solved at present.

Utility model content

The technical problem to be solved by the utility model is to provide a liquid forging die device for the scroll blank of the automobile air-conditioning compressor. By setting the exhaust channel, the product has no air hole inclusion defect, and the obtained aluminum alloy product has higher precision. It solves the problem of low precision and smoothness of aluminum alloy products obtained by traditional aluminum alloy liquid die forging.

The technical scheme of the utility model is:

A liquid forging die device for a scroll blank for an automobile air-conditioning compressor, comprising a punch, a die arranged below the punch and matched with the punch, a plurality of dies arranged on the punch and connected to an upper oil cylinder at the top The upper ejector rod and a plurality of lower ejector rods arranged on the die and connected to the lower oil cylinder at the bottom, the punch is provided with a plurality of vertically through upper ejector rod holes, and the plurality of upper ejector rods The rods are respectively inserted into the corresponding upper ejector pin holes and have a coaxial clearance fit structure with the upper ejector pin holes. The die is provided with a plurality of vertically penetrating lower ejector pin holes. The plurality of lower ejector pin holes The upper parts of the rods are respectively inserted into the corresponding lower ejector rod holes and have a coaxial clearance fit structure with the lower ejector rod holes. The gap between the upper ejector rod and the upper ejector rod hole is E1, and the lower ejector rod and the gap between the lower ejector pin hole is E2, the clamping gap between the punch and the die is E3, the E1 is 0.02-0.04mm, the E2 is 0.02-0.04mm, and the E3 is 0.04-0.1mm .

A thermocouple installation hole is provided on the outer wall of the concave mold, and a thermocouple temperature detection device is arranged in the thermocouple installation hole.

The top of the punch is provided with a plurality of exhaust grooves corresponding to the holes of the corresponding upper ejector pins one by one.

The top of the punch is fixedly connected with an upper die flange, and the upper die flange is fixed on the liquid forging machine tool through the upper die connecting rod, and the top of the upper die flange is provided with an upper ejector flange, so The top end of the upper ejector rod passes through the flange of the upper die and is connected with the upper oil cylinder through the flange of the upper die.

The bottom of the concave mold is provided with a lower ejector rod gland, and a counterbore that penetrates up and down is provided on the lower ejector rod gland. The lower ejector rod has a stepped cylindrical structure, and the diameter of the bottom end is greater than the diameter of its upper part. The bottom end of the rod extends into the counterbore and has a coaxial clearance fit structure with the counterbore.

The bottom end of the lower ejector rod gland is fixedly connected with the lower ejector rod seat by bolts.

The die is fixed on the die base.

There are at least four upper ejector pins and lower ejector pins, and there are at least four corresponding upper ejector pin holes and lower ejector pin holes.

Advantage of the utility model:

In the process of continuous pressurization and filling, the utility model can not only realize the filling of the product to a greater extent, but also has no cold insulation defect, adopts direct pressurization, the speed of pressurization is slow, and has sufficient exhaust device, There is no pore inclusion defect. By setting the size of E1, E2 and E3, during the forming process of the scroll blank, the gas is discharged through the exhaust channel formed by the gap E1, E2 and E3 due to the pressure, so as to realize the precision in the mold processing process. Exhaust to avoid defects such as pinholes, pore inclusions, and shrinkage cavities in the formed aluminum alloy blank caused by gas accumulation, and the gaps E1 and E2 are set to 0.02-0.04mm, on the one hand to avoid excessive air gaps that cause reverse entry into the mold , resulting in defects such as pore inclusions, shrinkage and shrinkage cavities in the formed aluminum alloy blank. On the one hand, avoid the defect that the gap is too small, resulting in poor exhaust of the mold. When the gap E3 is set to 0.04-0.1mm, on the one hand, avoid the gap from being too large The mold clamping is not strict, and finally the formed aluminum alloy blank has burr defects, and the surface finish is not high. Margin, save material, reduce manufacturing cost.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

See Fig. 1, a kind of liquid forging die device of the scroll blank of automobile air-conditioning compressor, comprises punch 1, is arranged on punch 1 below and the die 2 that cooperates with punch 1, at least four are arranged on On the punch 1, an upper ejector rod 3 whose top end is connected to the upper oil cylinder and at least four lower ejector rods 4 arranged on the die 2 and whose bottom end is connected to the lower oil cylinder, the punch 1 is provided with at least four vertically through The upper ejector pin hole, the top of the punch 1 is provided with at least four exhaust grooves 5 that correspond to the corresponding upper ejector pin holes one by one, and the upper ejector pins 3 are respectively inserted into the corresponding upper ejector pin holes and connected to the upper ejector pin holes. The rod hole is a coaxial clearance fit structure, the die 2 is fixed on the die base 6, and the die 2 is provided with at least four vertically penetrating lower ejector rod holes, and the upper parts of the lower ejector rods 4 are respectively inserted into the corresponding lower ejector rod holes. Inside the ejector pin hole and with the lower ejector pin hole is a coaxial clearance fit structure, the gap between the upper ejector pin 3 and the upper ejector pin hole is E1, the gap between the lower ejector pin 4 and the lower ejector pin hole is E2, the convex The clamping gap between mold 1 and die 2 is E3, E1 is 0.02-0.04mm, E2 is 0.02-0.04mm, and E3 is 0.04-0.1mm.

Wherein, the outer wall of the die 2 is provided with a thermocouple installation hole 7, and a thermocouple temperature detection device is arranged in the thermocouple installation hole 7, so that the temperature of the die 2 is within a certain range, which solves the problem that the die temperature is too high and Too low defect.

The upper die flange 8 is fixedly connected to the top of the punch 1, and the upper die flange 8 is fixed on the liquid die forging machine tool through the upper die connecting rod. The top of the rod 3 passes through the upper die flange 8 and is connected with the upper oil cylinder by the upper die flange 9 .

The bottom of the die 2 is provided with a lower ejector pin gland 10, and the bottom end of the lower ejector pin gland 10 is fixedly connected with a lower ejector pin seat 11 by bolts. The rod 4 is a stepped cylindrical structure, and the diameter of the bottom end is larger than the diameter of its upper part, and the bottom end of the lower ejector rod 4 extends into the counterbore and has a coaxial clearance fit structure with the counterbore.

A die forging method of a liquid die forging die device for a scroll blank, specifically comprising the following steps:

(1), install the mold: install the punch 1 and the die 2 on the liquid die forging machine;

(2) Pouring: pour aluminum liquid with a temperature of 660-800°C and a volume of 1-1.05 times the volume of the blank directly into the cavity of the die 2;

(3) Pressurized filling: push the punch 1 to move downward at a speed of 5-50mm/s, and fill the entire mold cavity after the punch 1 and the die 2 are closed with the aluminum liquid;

(4) Sustained pressure feeding: with a pressure of 50-120MPa, continue to push the punch 1 to continuously exert pressure on the molten aluminum, and maintain the pressure until it is completely solidified;

(5) Pressure relief and part removal: the punch 1 is reset, and the blank in the die 2 is ejected by the lower ejector rod 4 driven by the lower oil cylinder to obtain a blank product.

The casting system without riser is used in the manufacture of the liquid forging die, which directly fills the mold cavity, avoids waste of riser, and improves the utilization rate of materials. There is a coating protective layer in the mold cavity in contact with the aluminum liquid, which is used to protect the mold on the one hand, and facilitates the demoulding of the blank product in the mold cavity on the other hand. The lower ejector rod 4 is driven by the lower oil cylinder to move towards the direction of the die 2, and ejects the blank product in the mold cavity to realize the demoulding of the blank product.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a liquid forging die set of vortex dish blank for vehicle air conditioner compressor which characterized in that: the device comprises a male die, a female die which is arranged below the male die and matched with the male die, a plurality of upper ejector rods which are arranged on the male die and the top ends of which are connected with an upper oil cylinder, and a plurality of lower ejector rods which are arranged on the female die and the bottom ends of which are connected with a lower oil cylinder, wherein the male die is provided with a plurality of vertically through upper ejector rod holes, the plurality of upper ejector rods are respectively inserted into the corresponding upper ejector rod holes and are in coaxial clearance fit with the upper ejector rod holes, the female die is provided with a plurality of vertically through lower ejector rod holes, the upper parts of the plurality of lower ejector rods are respectively inserted into the corresponding lower ejector rod holes and are in coaxial clearance fit with the lower ejector rod holes, the clearance between the upper ejector rods and the upper ejector rod holes is E1, the clearance between the lower ejector rods and the lower ejector rod holes is E2, the die assembly clearance between the male die and the female die is E3, the E1 is 0.02-0.04mm, and the E2 is 0.02-0.04mm, e3 is 0.04-0.1 mm.

2. The liquid forging die device of the scroll plate blank for the automobile air conditioning compressor, according to claim 1, is characterized in that: and a thermocouple mounting hole is formed in the outer side wall of the female die, and a thermocouple temperature detection device is arranged in the thermocouple mounting hole.

3. The liquid forging die device of the scroll plate blank for the automobile air conditioning compressor, according to claim 1, is characterized in that: and the top end of the male die is provided with a plurality of exhaust grooves which are respectively in one-to-one correspondence with the corresponding upper ejector rod holes.

4. The liquid forging die device of the scroll plate blank for the automobile air conditioning compressor, according to claim 1, is characterized in that: the top end of the male die is fixedly connected with an upper die flange, the upper die flange is fixed on a liquid die forging machine tool through an upper die connecting rod, an upper ejector rod flange is arranged at the top end of the upper die flange, and the top end of the upper ejector rod penetrates through the upper die flange and is connected with an upper oil cylinder through the upper die flange.

5. The liquid forging die device of the scroll plate blank for the automobile air conditioning compressor, according to claim 1, is characterized in that: the lower ejector rod is of a stepped cylindrical structure, the diameter of the bottom end of the lower ejector rod is larger than that of the upper portion of the lower ejector rod, and the bottom end of the lower ejector rod extends into the counter bore and is in a coaxial clearance fit structure with the counter bore.

6. The liquid forging die device of the scroll plate blank for the automobile air conditioning compressor, according to claim 5, is characterized in that: the bottom end of the lower ejector rod gland is fixedly connected with a lower ejector rod seat through a bolt.

7. The liquid forging die device of the scroll plate blank for the automobile air conditioning compressor, according to claim 1, is characterized in that: the female die is fixed on the female die holder.

8. The liquid forging die device of the scroll plate blank for the automobile air conditioning compressor, according to claim 1, is characterized in that: the number of the upper ejector rods and the lower ejector rods is at least four, and the number of the corresponding upper ejector rod holes and the corresponding lower ejector rod holes is at least four.