Drawing and rolling extrusion composite forging die for diesel engine high-pressure oil pipe connecting seat

Abstract

According to the drawing-out and rolling-extrusion composite forging die for the diesel engine high-pressure oil pipe connecting base, finish-forging forming grooves are symmetrically formed in plate faces of the lower end face of an upper die and the upper end face of a lower die, and rolling-extrusion grooves which are located on the left sides of the finish-forging forming grooves and communicated with the left end face and the front side wall are formed in the lower end face of the upper die and the upper end face of the lower die. The lower end face of the upper die and the upper end face of the lower die are provided with forming grooves located on the right side of the finish forging forming groove and communicating with the right end face and the front side wall. When the upper die and the lower die are in a die assembly state, the rolling and extruding type groove, the forming type groove and the finish forging forming groove in the upper die and the lower die respectively form a rolling and extruding type groove die boring, a forming type groove die boring and a finish forging forming die boring which are used for sequentially forging and forming a high-pressure oil pipe connecting base blank, and drawing platforms are arranged on the lower end face of the upper die and the upper end face of the lower die. Forging forming of the high-pressure oil pipe connecting base is achieved, the problems that the number of oxide skin cushion pits on the surface of a forge piece is large, the end of the connecting end of the forge piece and the oil sprayer is not fully filled, and meat missing exists are solved, energy resource consumption is small, and material consumption is small.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engines, and in particular relates to a drawing and rolling composite forging die for a high-pressure oil pipe connecting seat of a diesel engine. Background Art

[0002] The high-pressure oil pipe connector is an important part of the fuel transmission system, which connects the high-pressure oil pump and the diesel engine injector. Its main function is to deliver the high-pressure fuel generated by the high-pressure oil pump to the diesel engine injector so that it can be injected into the combustion chamber of the engine for combustion, so that the diesel engine can operate normally. The high-pressure oil pipe connector forms a certain fuel pressure under the pressure of the fuel pump and transmits it to the fuel injector. The pressure inside the high-pressure oil pipe connector needs to be maintained within an appropriate range to ensure that the fuel injector can spray according to the set timing and fuel quantity.

[0003] When the engine is working, there are shock waves and vibrations from the injection nozzle and the pump oil. The high-pressure oil pipe connector, as the medium connecting the two, must have high rigidity and pressure resistance to absorb and slow down the shock waves and vibrations from the fuel injection system and reduce the damage of pressure fluctuations to the engine and other system parts. Therefore, the raw materials of the parts must be forged. Figure 7-8 As shown, the cross-section of the high-pressure oil pipe connector formed by die forging varies greatly and there are mutations. The ratio of the maximum cross-section to the minimum cross-section area is greater than 5. If the free forging process is used to make the blank and then directly die forged, the hammer forging die will have a simple structure, small size, low mold processing cost, and relatively simple forging operation. However, its disadvantage is that two forging equipment, free forging and die forging, are required, and at least two heating processes are required, which consumes a lot of energy resources. In addition, the shape of the blank before final forging is relatively simple, the size of the final forging burrs is large and uneven, and the material consumption is large. Therefore, considering all factors, it is necessary to set up a set of hammer forging dies to solve the above technical problems. Utility Model Content

[0004] The technical problem solved by the utility model is as follows: a drawing and rolling composite forging die for a diesel engine high-pressure oil pipe connecting seat is provided, a drawing platform, a rolling groove die boring, a forming groove die boring and a final forging forming die boring are arranged on a set of hammer forging dies formed by an upper die and a lower die, so as to realize the forging of the high-pressure oil pipe connecting seat, solve the problems of many oxide scale pad pits on the surface of the forging and the incomplete filling and lack of meat at the end of the connection end of the forging and the injector, ensure the full filling and surface quality of the parts, only one device is needed, the energy resource consumption is small, the billet shape and cross-sectional distribution before final forging are more in line with the forging shape, and the material consumption is small.

[0005] The technical solution adopted by the utility model is a composite forging die for drawing and rolling forging of a high-pressure oil pipe connecting seat of a diesel engine, comprising an upper die and a lower die, wherein the lower end face of the upper die and the upper end face of the lower die are symmetrically provided with final forging forming grooves on the plate surfaces, the lower end face of the upper die and the upper end face of the lower die are provided with a rolling forming groove located on the left side of the final forging forming groove and connected with the left end face and the front side wall, and the lower end face of the upper die and the upper end face of the lower die are provided with a forming forming groove located on the right side of the final forging forming groove and connected with the right end face and the front side wall, the rolling forming groove, the forming forming groove and the final forging forming groove on the upper die and the lower die in the mold closing state respectively form a rolling forming groove die boring, a forming forming groove die boring and a final forging forming die boring for forging a high-pressure oil pipe connecting seat blank in sequence, and the lower end face of the upper die and the upper end face of the lower die are provided with a drawing platform located between the rolling forming groove die boring and the forming forming groove die boring.

[0006] Wherein, the upper end surface of the upper die and the lower end surface of the lower die are both provided with dovetail platforms for adapting and connecting with the hammer head and the lower anvil on the die forging hammer.

[0007] Furthermore, the side walls of the upper die and the lower die are both provided with lifting holes arranged close to the dovetail platforms thereon.

[0008] Furthermore, the final forging groove and the dovetail platform are located on the same center line.

[0009] Furthermore, the lower end surface of the upper die and the upper end surface of the lower die are formed with burr grooves corresponding in position and surrounding the final forging forming groove on them.

[0010] Furthermore, the lower end surface of the upper die and the upper end surface of the lower die are formed with jaw grooves which are connected with the final forging groove thereon through the jaw neck and the burr groove, and the jaw groove openings are located on the front side walls of the upper die and the lower die.

[0011] Furthermore, the rolling type slot die boring is a slender irregular shape, the forming type slot die boring is a shape close to the outer contour of the high-pressure oil pipe connecting seat, and the front ports of the rolling type slot die boring and the forming type slot die boring are both bell mouths connected to the front side walls of the upper and lower dies.

[0012] The forging method of the drawing and rolling composite forging die of the diesel engine high-pressure oil pipe connection seat comprises the following steps:

[0013] 1) Heating: Place the blank of the high-pressure oil pipe connector into a heating furnace for heating;

[0014] 2) Drawing: After heating the blank, clamp one end of the blank with pliers, and place the other end of the blank with the part to be drawn on the drawing platform between the upper die and the lower die. When the upper die moves up and down, hammer the drawn part of the blank several times to draw it to the target length;

[0015] 3) Rolling and extrusion: After the blank is turned over, it is placed in the rolling and extrusion groove die as a whole. During the up and down movement of the upper die, the blank is hammered several times to make it roll and extrude in the rolling and extrusion groove die;

[0016] 4) Molding: The roll-extruded blank is placed as a whole into the forming slot die, and hammered by the upper die during the up and down movement;

[0017] 5) Final forging: The blank is placed in the final forging die as a whole, and hammered into shape by the upper die that moves up and down;

[0018] 6) Trimming: Use a trimming press to hot-cut the flash of the final forged high-pressure oil pipe connector.

[0019] Furthermore, the heating temperature of the billet in the drawing, rolling and forming steps is 1200°C to 1300°C, and the temperature of the billet in the final forging step is 700°C to 800°C.

[0020] The advantages of this utility model compared with the prior art:

[0021] 1. This technical solution arranges a drawing platform, a rolling groove die boring machine, a forming groove die boring machine and a final forging die boring machine on a set of hammer forging dies formed by an upper die and a lower die, so as to realize the forging of the high-pressure oil pipe connection seat, solve the problem that there are many oxide scale pad pits on the surface of the forging and the end of the forging and the injector connection end is not fully filled and lacks meat, and ensures the full filling and surface quality of the parts;

[0022] 2. This technical solution designs the drawing platform on the left side of the final forging die boring, close to the rolling groove, and the forming groove is arranged on the right side of the final forging die boring, so that the operator can minimize or avoid time-consuming and laborious operations such as flipping and turning;

[0023] 3. This technical solution only requires one device, with low energy resource consumption. The shape and cross-sectional distribution of the blank before final forging are closer to the shape of the forged part, with low material consumption, reduced equipment cost and improved product quality.

[0024] 4. The mold structure of this technical solution is simple and easy to operate. The operator only needs to pay attention to the control of the feed amount and impact force of the first step of the drawing process during the processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the upper mold structure of the utility model;

[0027] Figure 3 for Figure 1 Schematic diagram of the C-direction structure;

[0028] Figure 4 for Figure 1 Schematic diagram of the D-direction structure;

[0029] Figure 5 for Figure 2 Partial cross-sectional view of the middle AA position and the upper mold in the mold closing state;

[0030] Figure 6 for Figure 2 Partial cross-sectional view of the middle BB position and the upper mold in the mold closing state;

[0031] Figure 7 This is the front view of the high-pressure oil pipe connection seat structure;

[0032] Figure 8 This is a top view of the high-pressure oil pipe connection seat structure. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiment of the present utility model Figure 1-6 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that, in this article, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0036] The drawing and rolling composite forging die for the high-pressure oil pipe connecting seat of a diesel engine comprises an upper die 1 and a lower die 2, wherein the lower end face of the upper die 1 and the upper end face of the lower die 2 are symmetrically provided with a final forging forming groove 3 on the plate surface, the lower end face of the upper die 1 and the upper end face of the lower die 2 are provided with a rolling forming groove 4 located on the left side of the final forging forming groove 3 and connected with the left end face and the front side wall, and the lower end face of the upper die 1 and the upper end face of the lower die 2 are provided with a forming groove 5 located on the right side of the final forging forming groove 3 and connected with the right end face and the front side wall. Since most of the area of ​​the part is exposed outside the diesel engine, the surface aesthetics of the forging is required to be high. In order to avoid factors such as oxide scale pad pits and bumps during operation, the rolling forming groove 4 and the forming forming groove 5 are designed to be open structures, that is, the grooves are connected to the corresponding end faces and the front side wall, so that the oxide scale hammered off during operation will not remain in the groove, thereby reducing the forging caused by the oxide scale falling and unclean hammering. The surface of the workpiece is provided with a pit; the rolling groove 4, the forming groove 5 and the final forging forming groove 3 on the upper die 1 and the lower die 2 in the mold-clamping state respectively form a rolling groove die boring 6, a forming groove die boring 7 and a final forging forming die boring 8 for forging the high-pressure oil pipe connection seat blank in sequence, and the lower end surface of the upper die 1 and the upper end surface of the lower die 2 are provided with a drawing platform 9 located between the rolling groove die boring 6 and the forming groove die boring 7; in the above structure, in order to improve production efficiency and save equipment In order to reduce factors such as equipment, manpower and intermediate circulation collision, a drawing platform 9, a rolling groove die boring machine 6, a forming groove die boring machine 7 and a final forging forming die boring machine 8 are arranged on a set of hammer forging dies at the same time to realize the forging of the high-pressure oil pipe connecting seat. Only one device is needed, and the energy resource consumption is small. The shape and cross-sectional distribution of the blank before final forging are more consistent with the shape of the forging, and the material consumption is small. In order to avoid indentations and folds during the drawing process, the edges of the drawing platform 9 are rounded.

[0037] Among them, in order to facilitate the installation of the upper die 1 and the lower die 2 at the corresponding positions of the die forging hammer, a dovetail platform 10 for adapting and connecting with the hammer head and the lower anvil on the die forging hammer is formed on the upper end surface of the upper die 1 and the lower end surface of the lower die 2; specifically, the side walls of the upper die 1 and the lower die 2 are provided with lifting holes 11 arranged close to the dovetail platform 10 thereon; specifically, the final forging forming groove 3 and the dovetail platform 10 are located on the same center line.

[0038] The lower end surface of the upper die 1 and the upper end surface of the lower die 2 are formed with burr grooves 12 which correspond in position and surround the final forging forming groove 3 thereon; the provision of the burr grooves 12 is conducive to storing the burr material in the burr grooves 12 during free forging of the blank, thereby avoiding folding at the connection between the high-pressure oil pump connection end of the forging and the rod; the lower end surface of the upper die 1 and the upper end surface of the lower die 2 are formed with jaw grooves 14 which are connected with the final forging forming groove 3 thereon through the jaw neck 13 and the burr grooves 12, and the jaw grooves 14 are located on the front side walls of the upper die 1 and the lower die 2, and the excess burr material passes through the jaw neck 13 and the burr grooves 12 into the jaw grooves 14. After the forging is completed, the burrs in the jaw grooves 14 are tilted to achieve rapid demolding of the formed part.

[0039] The rolling groove die boring 6 is an elongated irregular shape, and the forming groove die boring 7 is an asymmetric shape close to the outer contour of the high-pressure oil pipe connecting seat. The front ports of the rolling groove die boring 6 and the forming groove die boring 7 are both bell-shaped ports connected to the front side walls of the upper die 1 and the lower die 2. Considering that the height and width of the two ends of the high-pressure oil pipe connecting seat and the height and width of the middle part vary greatly, if the shape transition of the blank is not smooth before final forging, it is easy to cause a sudden change in metal flow and cause folding during the final forging process, so the forming groove 5 is added.

[0040] The forging method of the drawing and rolling composite forging die of the diesel engine high-pressure oil pipe connection seat comprises the following steps:

[0041] 1) Heating: Place the φ90×150 billet of the high-pressure oil pipe connection seat into the heating furnace for heating;

[0042] 2) Drawing: After heating the blank, clamp one end of the blank with pliers, and place the other end of the drawn part of about 65 mm on the drawing platform 9 between the upper die 1 and the lower die 2. During the up and down movement of the upper die 1, hammer the drawn part of the blank four times to draw it to the target length of 75 mm;

[0043] 3) Rolling extrusion: After the blank is turned over, it is placed in the rolling extrusion slot die boring 6 as a whole, and the blank is hammered twice during the up and down movement of the upper die 1, so that it is roll-extruded in the rolling extrusion slot die boring 6;

[0044] 4) Molding: The roll-extruded blank is placed as a whole into the forming groove die boring 7, and hammered by the upper die 1 in the process of moving up and down, and the hammering frequency is one time;

[0045] 5) Final forging: the blank is placed in a final forging die 8 as a whole, and hammered by an upper die 1 that moves up and down, and the hammering frequency is one time;

[0046] 6) Trimming: Use a trimming press to hot-cut the flash of the final forged high-pressure oil pipe connector.

[0047] In the above processing steps, the heating temperature of the blank in the drawing, rolling and forming steps is 1250°C, and the temperature of the blank in the final forging step is 750°C. The entire forging process is concentrated on a set of hammer forging dies, which saves the blank circulation time. The blank only needs to be heated once to complete the blank forging.

[0048] The technical solution arranges a drawing platform 9, an open rolling groove die boring 6, a forming groove die boring 7 and a closed final forging forming die boring 8 on a set of hammer forging dies formed by an upper die 1 and a lower die 2, so as to realize the forging of a high-pressure oil pipe connection seat, solve the problem that there are many oxide scale pad pits on the surface of the forging and the end of the forging connecting end with the injector is not fully filled and lacks meat, and ensures the full filling and surface quality of the parts; the drawing platform 9 is designed on the left side of the final forging forming die boring 8 of the die, close to the rolling groove 4, and the forming groove 5 is arranged on the right side of the final forging forming die boring 8, so that the operator can minimize or avoid time-consuming and laborious operations such as flipping and turning; only one device is needed, the energy and resource consumption is small, the shape and cross-sectional distribution of the blank before final forging are closer to the shape of the forging, the material consumption is small, the equipment cost is reduced, and the product quality is improved; the die structure is simple and easy to operate, and the operator only needs to pay attention to the control of the feed amount and the impact force of the first drawing process during the processing.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A composite forging die for drawing and rolling for the high-pressure oil pipe connector of a diesel engine, characterized in that: The invention comprises an upper die (1) and a lower die (2), wherein the lower end face of the upper die (1) and the upper end face of the lower die (2) are symmetrically provided with a final forging forming groove (3) on the plate surface, the lower end face of the upper die (1) and the upper end face of the lower die (2) are provided with a rolling groove (4) located on the left side of the final forging forming groove (3) and connected to the left end face and the front side wall, and the lower end face of the upper die (1) and the upper end face of the lower die (2) are provided with a forming groove (5) located on the right side of the final forging forming groove (3) and connected to the right end face and the front side wall. 5), the rolling groove (4), the forming groove (5) and the final forging groove (3) on the upper die (1) and the lower die (2) when the upper die (1) and the lower die (2) are in the mold-clamping state respectively form a rolling groove die bore (6), a forming groove die bore (7) and a final forging die bore (8) for forging the high-pressure oil pipe connection seat blank in sequence, and the lower end surface of the upper die (1) and the upper end surface of the lower die (2) are provided with a drawing platform (9) located between the rolling groove die bore (6) and the forming groove die bore (7).

2. The drawing and rolling composite forging die for the diesel engine high-pressure oil pipe connector according to claim 1 is characterized in that: The upper end surface of the upper die (1) and the lower end surface of the lower die (2) are both provided with a dovetail platform (10) for adapting and connecting with the hammer head and the lower anvil on the die forging hammer.

3. The drawing and rolling composite forging die for the diesel engine high pressure oil pipe connector according to claim 2, characterized in that: The side walls of the upper mold (1) and the lower mold (2) are both provided with lifting holes (11) arranged close to the dovetail platform (10) thereon.

4. The drawing and rolling composite forging die for a diesel engine high pressure oil pipe connector according to claim 3, characterized in that: The final forging groove (3) and the dovetail platform (10) are located on the same center line.

5. The drawing and rolling composite forging die for a diesel engine high-pressure oil pipe connector according to claim 1, characterized in that: The lower end surface of the upper die (1) and the upper end surface of the lower die (2) are provided with burr grooves (12) which correspond in position and surround the final forging groove (3) thereon.

6. The drawing and rolling composite forging die for the diesel engine high-pressure oil pipe connector according to claim 5, characterized in that: The lower end surface of the upper die (1) and the upper end surface of the lower die (2) are provided with a jaw groove (14) which is connected to the final forging groove (3) thereon through a jaw neck (13) and a burr groove (12), and the jaw groove (14) is located on the front side walls of the upper die (1) and the lower die (2).

7. The drawing and rolling composite forging die for a diesel engine high pressure oil pipe connector according to any one of claims 1 to 6, characterized in that: The rolling type slot die boring (6) is of an elongated irregular shape, and the forming type slot die boring (7) is of a shape close to the outer contour of the high-pressure oil pipe connection seat. The front ports of the rolling type slot die boring (6) and the forming type slot die boring (7) are both bell mouths connected to the front side walls of the upper die (1) and the lower die (2).

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