CN211915377U - Inclined ejection mechanism arranged in die frame base plate for demolding of steering knuckle forging stock - Google Patents

Abstract

A sloping ejector mechanism is provided in the die base pad for demoulding the steering knuckle forging blank. The specific method is that the ejector demoulding power cylinder of the steering knuckle forging blank is installed in the die base pad obliquely upward, and the installation position is at The extension line of the center line of the top material hole of the lower die of the forging die, and an angle β is formed with the vertical line of the bottom surface of the lower die of the steering knuckle forging; The gear surface can be demolded normally and without the need for additional material design on the inner gear surface of the steering knuckle blank fork lug, the angle formed between the center line of the steering knuckle forging blank rod and the vertical line of the bottom surface of the die, the top material is released from the mold The power cylinder is connected to a hydraulic station or an air station.

Description

A sloping ejector mechanism arranged in a die set backing plate for the demoulding of a steering knuckle forging blank

technical field

The utility model relates to the field of manufacturing of forging blanks for steering knuckles, in particular to an inclined ejector mechanism arranged in a backing plate of a die set for demoulding of forging blanks for steering knuckles.

Background technique

The ejector and ejection mechanism of the general forging machine can only be installed under the bottom beam of the equipment. During the forging process, the main slider drives the upper die to hit the lower die, and the lower die is fixed on the die base plate, which is installed on the equipment. The upper part of the bottom beam, (as shown in Figure 1), this determines that the top material cylinder installed in the lower part of the bottom beam of the equipment can only carry out the top material perpendicular to the die base plate, and the lower forging die is fixed on the die base during the forging process. Therefore, the ejector mechanism of general forging equipment can only perform vertical ejection perpendicular to the bottom surface of the lower forging die. Due to the particularity of the steering knuckle product (as shown in Figure 2), there is an included angle a between the inner gear surface of the steering knuckle fork lug 1 and the center line of the steering knuckle rod 3, resulting in the use of general forging equipment and conventional steering knuckle vertical When the steering knuckle forging blank is produced by the conventional forging process, the designed die must make the rod of the steering knuckle forging blank perpendicular to the lower bottom surface of the mold during the forging process, so that the conventional ejector mechanism can normally eject the material vertically upward for demoulding. , When designing the mold, the forging allowance of the inner gear surface of the fork lug 1 of the steering knuckle will not be designed according to the conventional forging process allowance, otherwise the upper die of the steering knuckle forging will form a reverse draft on the inner gear surface of the fork lug 1 (such as As shown in Figure 3), therefore the existing conventional vertical forging process of the steering knuckle must increase the forging allowance of the inner gear surface of the fork lug 1 in the form of material addition (as shown in the shaded part of Figure 3), so as to make the steering knuckle The upper forging die can be demolded normally at the position of the inner surface of the fork lug 1 (as shown by the shaded part in the die cavity in Figure 1), because the material must be increased, which increases the weight of the steering knuckle blank, which not only wastes the material, but also Increasing the cutting amount of subsequent processing increases the production cost of steering knuckle products.

Utility model content

In order to solve the problem of high production cost in the existing vertical forging process of the steering knuckle, the utility model designs a sloping ejector mechanism which is arranged in the backing plate of the die base for demoulding the forging blank of the steering knuckle. In the mold base plate below the lower mold, a top material cylinder installed obliquely upward is designed to realize the top material demoulding (as shown in Figure 5). The specific design scheme is as follows:

①. When designing the steering knuckle forging die, set an angle β between the center line of the steering knuckle blank rod and the bottom surface vertical line of the steering knuckle forging lower die in the steering knuckle forging lower die (as shown in Figure 4, β angle shown in Figure 5). The method for determining this β angle is: to ensure that the inner surface of the upper fork lug 1 and the fork lug 2 of the steering knuckle blank can be normally demolded without the need for additional material design to realize the normal demoulding of the steering knuckle forging upper die. At this time, the steering knuckle forging The center line of the blank stem of the steering knuckle in the lower die will form an included angle with the vertical line of the bottom surface of the lower die, and this included angle is set as β (which can be simulated by computer 3D design when designing the steering knuckle die) .

②. Design the ejector hole of the lower die for the forging of the steering knuckle blank at the end face of the steering knuckle blank stem, and the centerline of the ejection hole coincides with the centerline of the steering knuckle blank stem.

③. The center line of the ejector cylinder designed and installed in the mold base plate is also coincident with or parallel to the center line of the blank rod of the steering knuckle to ensure that the ejector is convenient and feasible.

④. The end face of the piston rod of the ejector cylinder in the backing plate of the die set is also designed with a ejector hole. This ejector hole is connected with the ejector hole of the steering knuckle forging lower die, and the center lines of the two ejector holes overlap to ensure that The same ejector rod that can move along the hole is placed in the middle of the two ejector holes, so that the action of the piston rod of the ejector cylinder can be realized, and the ejector rod can be used to realize the ejection of the ejector.

⑤. Steering knuckle blank forging is divided into pre-forging and final forging. The top material scheme of pre-forging and final forging is the same, and they are installed in the lower die of the steering knuckle pre-forging die and the bottom die of the final forging die respectively according to the above scheme. Two sets of ejector cylinders are used to realize the pre-forging and final forging of the steering knuckle blank respectively.

Beneficial effects: The utility model can realize the blank forging without adding material to the inner gear of the fork lug of the blank of the steering knuckle, as shown in FIG. 4 . Because there is no material increase design for the fork lug inner gear of the steering knuckle blank, the weight of the steering knuckle blank will inevitably be reduced, thereby saving raw materials, reducing machining allowance, and reducing the production cost of steering knuckle products.

Description of drawings

Figure 1 is a schematic diagram of a general-purpose forging machine forging a steering knuckle blank.

Figure 2 is a schematic diagram of the parts structure of the steering knuckle product.

FIG. 3 is a schematic diagram of a blank of a conventional vertical forging process of a steering knuckle.

FIG. 4 is a schematic diagram of a blank of the utility model to realize the vertical forging process of the steering knuckle by using the inclined top material mechanism.

Figure 5 is a schematic structural diagram of the inclined ejector mechanism of the present invention.

In the figure, the corresponding relationship between component names and drawing numbers is:

1. Big ear fork; 2. Small ear fork; 3. Steering knuckle rod part;

Detailed ways

The utility model has been specifically implemented with the heavy-duty vehicle steering knuckle 30N-017 product (now mass-produced). This steering knuckle product fork lug 1 has an included angle of 8° with the center line of the rod. We designed and installed an upwardly inclined top material cylinder in the lower die base plate. The center line of this top material cylinder and the vertical line of the bottom surface of the lower die for steering knuckle forging are also designed to be 8°. On the extension line of the center line of the material hole, the center line of the steering knuckle rod in the lower die of the steering knuckle forging is designed to coincide with the center line of the top material hole of the lower die of the steering knuckle forging, and the center line of the top material cylinder in the design of the die base plate and the lower die are designed. The center lines of the ejector holes coincide, and two ejector holes are designed to communicate between the end face of the steering knuckle blank rod and the end face of the cylinder piston rod in the lower die of the steering knuckle forging. A ejector rod is placed in the ejector hole to realize ejection. The rod can be tilted up to 8°. The blank forging of steering knuckle 30N-017 requires pre-forging and final forging, and the top material scheme of pre-forging and final forging is the same. The pre-forging die and the final forging die are respectively installed on the same die set backing plate, and the same inclined upward 8° top material cylinder is respectively installed in the die set backing plate under the pre-forging die and the final forging die. This solution makes the forging blank of steering knuckle 30N-017 fork lug 1 and fork lug 2 without material addition and realizes normal demoulding, and realizes the weight of steering knuckle 30N-017 blank forged by the original process of 21.5 kg is reduced to 18.5kg, while the amount of raw materials used is reduced from the original 24kg to 20.5kg, the iron filings produced by the product processing are reduced from the original 8kg to the current 5kg, the final product is exactly the same, and the cost saving effect is remarkable.

Claims (1)

1. The oblique material ejecting mechanism is characterized in that a vertical material ejecting mechanism arranged below a bottom beam of a conventional forging machine tool is changed into an ejecting cylinder arranged in the die carrier base plate in an oblique upward manner, so that the oblique material ejecting and demolding from the end surface of a steering knuckle rod part are realized when the steering knuckle vertical forging blank is forged, and meanwhile, the material increasing design is not needed to be carried out on the inner gear of a fork lug of the steering knuckle forging blank when the steering knuckle vertical forging blank is used in a vertical forging process.

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