A forging piston production die

Abstract

The utility model discloses a kind of forging piston production mould, including upper die holder and lower die holder, further include: outer mould, it is fixedly arranged on the lower end of lower die holder;Inner die holder, it is fixedly arranged on the lower end of upper die holder;Die bottom, it is movably arranged in outer mould;Material ejection support plate, it is located below lower die holder, the upper end of the material ejection support plate is fixedly connected with ejector rod, the other end of the ejector rod is fixedly connected with the lower end of die bottom through lower die holder;Guiding assembly, the upper die holder is movably arranged on lower die holder by guiding assembly, piston after forging can be ejected from outer mould by die bottom, realize automatic discharge, so that production efficiency is improved, personnel manual operation is avoided simultaneously, increase the security when forging piston production.

Description

Technical Field

[0001] This utility model belongs to the field of forging piston production technology, and in particular relates to a forging piston production mold. Background Technology

[0002] Pistons operate at high speeds under high temperature and pressure in engines, requiring strong performance to ensure stability. This is especially true for high-power, high-speed engines exceeding 10,000 RPM, where the demands on piston strength, resistance to pressure and fatigue are even more stringent. Ordinary pistons can no longer meet these higher requirements, and forged pistons are gaining increasing acceptance through continuous experimentation and application. However, forged pistons are more difficult to produce, have a higher technical coefficient, and lower production capacity, thus necessitating improvements to the production process. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a forging piston production mold, comprising an upper mold frame and a lower mold frame, characterized in that it further comprises:

[0004] The outer mold is fixedly mounted on the upper end of the lower mold frame;

[0005] The inner mold base is fixedly installed at the lower end of the upper mold frame;

[0006] The mold base is vertically movable within the outer mold;

[0007] A top material support plate is located below the lower mold frame. A top rod is fixedly connected to the upper end of the top material support plate, and the other end of the top rod passes through the lower mold frame and is fixedly connected to the lower end of the mold bottom.

[0008] The upper mold frame is movably mounted on the lower mold frame via the guide assembly.

[0009] Furthermore, it also includes:

[0010] Inserts are embedded in the lower mold frame to support the mold bottom. The inserts have through holes for the movement of ejector pins, and the number of inserts corresponds to the number of ejector pins.

[0011] Furthermore, it also includes:

[0012] Positioning pits: Both the upper mold frame and the lower mold frame are provided with corresponding positioning pits.

[0013] The lower end of the outer mold has a positioning step;

[0014] The first positioning plate is used to divide the positioning pit of the lower mold frame into two positioning holes that match the positioning steps;

[0015] The second positioning plate is provided in two, which is used to make the positioning pit of the lower mold frame form a positioning hole that matches the positioning step. Both the first positioning plate and the second positioning plate are detachably connected to the lower mold frame.

[0016] When the first positioning plate is fixedly connected to the lower mold frame, two sets of outer mold and inner mold base are provided; when the second positioning plate is fixedly connected to the lower mold frame, one set of outer mold and inner mold base is provided.

[0017] Furthermore, the guiding component includes:

[0018] Four guide pillars are provided, and all four guide pillars are fixedly mounted on the lower mold frame;

[0019] The guide sleeves are numbered to match the guide posts, and the guide sleeves are fixedly mounted on the upper mold frame and cooperate with the guide posts.

[0020] Furthermore, it also includes:

[0021] Shoulder, the lower outer circle of the mold bottom has a shoulder;

[0022] A movable hole is provided at the lower end of the outer mold, and the movable hole is configured to pass through the inner hole of the outer mold and match the shaft shoulder;

[0023] The shoulder is movably positioned within the movable hole.

[0024] Furthermore, the hardness of the inner mold base is HRC55 or higher.

[0025] Furthermore, the hardness of the insert is HRC55 or higher.

[0026] The beneficial effects of this utility model are as follows:

[0027] 1. After forging, the piston can be ejected from the outer mold through the bottom of the die, realizing automated material discharge, which improves production efficiency and avoids manual operation, thus increasing the safety of forging piston production.

[0028] 2. The insert can effectively resist forging pressure and prevent the lower die frame from deforming due to excessive force, thereby ensuring the relative positional accuracy of the outer die and the die bottom, reducing the impact on the piston size, and improving the piston's machining accuracy and stability.

[0029] 3. Single-mold or dual-mold production modes can be flexibly selected according to production needs: dual-mold production can forge two pistons at the same time, increasing production capacity; single-mold production can be used for processing small batches or special specification pistons, improving the applicability and efficiency of the equipment.

[0030] 4. It can ensure that the inner mold of the upper die holder and the outer mold of the lower die holder are strictly aligned during the forging process, while ensuring stable movement trajectory, avoiding piston forging defects (such as dimensional deviation, irregular shape, etc.) caused by misalignment, and significantly improving forging accuracy and product qualification rate.

[0031] 5. It can prevent the die bottom from falling out of the outer mold during ejection or resetting, ensuring the stability of the fit between the die bottom and the outer mold; at the same time, the fit between the shaft shoulder and the movable hole can help position the die bottom, ensuring the accurate position of the die bottom during forging, and further improving the dimensional accuracy of the piston.

[0032] 6. The inner mold base is directly connected to the inner mold and bears the axial pressure during the forging process. Because it is made of a material with a hardness of HRC55 or higher, the high hardness of the material can ensure that the inner mold base is not easily deformed under huge pressure and can also maintain the installation position accuracy of the inner mold.

[0033] 7. The insert directly supports the mold bottom and bears the forging pressure transmitted by the mold bottom. Because it is made of a material with a hardness of HRC55 or higher, the insert is not easy to wear or deform under long-term stress, thus maintaining stable support for the mold bottom. Attached Figure Description

[0034] Appendix Figure 1 This is a schematic diagram showing the disassembly of the upper and lower mold frames of this utility model;

[0035] Appendix Figure 2 This is a breakdown diagram of the lower mold frame (single mold form);

[0036] Appendix Figure 3 This is an inverted structural diagram of the outer mold;

[0037] Appendix Figure 4 This is a breakdown diagram of the upper mold frame (single mold configuration);

[0038] Appendix Figure 5 This is a cross-sectional view of the lower mold frame (single mold configuration);

[0039] Appendix Figure 6 This is a cross-sectional view of the lower mold frame (dual-mold configuration);

[0040] Appendix Figure 7 This is a structural diagram of the lower mold frame (dual-mold configuration);

[0041] Appendix Figure 8 This is a structural diagram showing the connection of the first positioning plate and the second positioning plate to the lower mold frame.

[0042] Appendix Figure 9 Construction diagram when one or two inner mold bases are set for the upper mold frame;

[0043] Explanation of reference numerals in the attached drawings: 1. Upper mold base, 2. Lower mold base, 3. Outer mold, 4. Inner mold base, 5. Mold bottom, 6. Ejector plate, 7. Ejector rod, 8. Insert, 9. Positioning pit, 10. Positioning step, 11. First positioning plate, 12. Second positioning plate, 13. Guide post, 14. Guide sleeve, 15. Shoulder, 16. Movable hole. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In the description of this application, it should be noted that the terminology used herein is only for describing specific implementations and is not intended to limit the exemplary implementations according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings indicate similar items, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings. Example 1

[0045] This embodiment provides a forging piston production mold, including an upper mold base 1 and a lower mold base 2, characterized in that it further includes:

[0046] The outer mold 3 is fixedly mounted on the upper end of the lower mold frame 2;

[0047] Inner mold base 4 is fixedly installed at the lower end of upper mold frame 1;

[0048] The mold base 5 is vertically movable within the outer mold 3;

[0049] The top material support plate 6 is located below the lower mold frame 2. The upper end of the top material support plate 6 is fixedly connected to the top rod 7, and the other end of the top rod 7 passes through the lower mold frame 2 and is fixedly connected to the lower end of the mold bottom 5.

[0050] The upper mold frame 1 is movably mounted on the lower mold frame 2 via the guide assembly.

[0051] In this technical solution, during actual use, an external press is also provided (this is existing technology and will not be described in detail here). The upper die frame 1 is fixed below the large slide of the press and connected to the upper oil cylinder of the press. The ejector plate 6 below the lower die frame 2 is connected to the lower oil cylinder of the press, forming a complete forging power system.

[0052] The outer mold 3 is fixed to the upper end of the lower mold frame 2, the inner mold base 4 is fixed to the lower end of the upper mold frame 1 and connected to the inner mold, the mold bottom 5 can move up and down inside the outer mold 3, the ejector rod 7 connects the mold bottom 5 and the ejector plate 6, and the guide component ensures accurate alignment of the mold frame.

[0053] During operation, the heated aluminum cake is placed into the outer mold 3, and then the press is started. The upper cylinder of the press drives the upper mold frame 1 to move downward, so that the inner mold of the inner mold seat 4 is inserted into the inner cavity of the outer mold 3, pressing the aluminum cake into a piston blank. After forging, the upper mold frame 1 moves upward to reset, and the lower cylinder of the press pushes the ejector plate 6. When the ejector plate 6 moves upward, it drives the ejector rod 7 to move upward. Since the other end of the ejector rod 7 passes through the lower mold frame 2 and is fixedly connected to the lower end of the mold bottom 5, the mold bottom 5 can be lifted by the ejector rod 7, and the formed piston is ejected from the outer mold 3.

[0054] With this structural design, the forged piston can be ejected from the outer mold 3 through the bottom mold 5, realizing automated material discharge, which improves production efficiency and avoids manual operation, thus increasing the safety of forging piston production. Example 2

[0055] This embodiment provides a forging piston production mold, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0056] Furthermore, it also includes:

[0057] Insert 8 is embedded in the lower mold frame 2 to support the mold bottom 5. The insert 8 has through holes for the movement of the ejector rod 7. The number of inserts 8 corresponds to the number of ejector rods 7.

[0058] In this technical solution, the insert 8 is a stepped cylindrical shape. The insert 8 is embedded in the first layer of the lower mold frame 2. Through holes are opened for the ejector rod 7 to pass through, so as to avoid the insert 8 interfering with the movement of the ejector rod 7.

[0059] The insert 8 supports the die base 5, which moves up and down inside the outer die 3. When the die base 5 moves up and down and during forging, the insert 8 is repeatedly subjected to pressure from the die base 5.

[0060] Due to the enormous pressure during the forging process, the insert 8 needs to withstand the impact force transmitted from the die base 5. Therefore, the high hardness of the material prevents the lower die frame 2 from deforming due to excessive force.

[0061] Through this structural design, the insert 8 can effectively resist forging pressure, prevent the lower die holder 2 from deforming due to excessive force, thereby ensuring the relative positional accuracy of the outer die 3 and the die bottom 5, reducing the impact on the piston size, and improving the piston's machining accuracy and stability. Example 3

[0062] This embodiment provides a forging piston production mold, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] Furthermore, it also includes:

[0064] Positioning pit 9: Both the upper mold frame 1 and the lower mold frame 2 are provided with corresponding positioning pits 9.

[0065] Positioning step 10, the lower end of the outer mold 3 has positioning step 10;

[0066] The first positioning plate 11 is used to divide the positioning pit 9 of the lower mold frame 2 into two positioning holes that match the positioning step 10.

[0067] The second positioning plate 12 is provided in two, which is used to make the positioning pit 9 of the lower mold frame 2 form a positioning hole that matches the positioning step 10. The first positioning plate 11 and the second positioning plate 12 are detachably connected to the lower mold frame 2.

[0068] When the first positioning plate 11 is fixedly connected to the lower mold frame 2, two sets of the outer mold 3 and the inner mold base 4 are provided; when the second positioning plate 12 is fixedly connected to the lower mold frame 2, one set of the outer mold 3 and the inner mold base 4 is provided.

[0069] In this technical solution, when dual mold production is required, the first positioning plate 11 is installed in the positioning pit 9, so that the first positioning plate 11 divides the positioning pit 9 of the lower mold frame 2 into two positioning holes that match the positioning step 10. At this time, the two outer molds 3 can be installed by the positioning step 10 and the two positioning holes respectively. Meanwhile, the positioning pit 9 at the lower end of the upper mold frame 1 has 3 openings, which can directly install the inner mold base 4, thereby adapting to the two sets of outer molds 3 and inner mold base 4.

[0070] When single mold production is required, the first positioning plate 11 is disassembled and two second positioning plates 12 are installed into the positioning pit 9, so that the positioning pit 9 forms a positioning hole that matches the positioning step 10. At this time, a single outer mold 3 can be installed by matching the positioning step 10 with a single positioning hole, and the inner mold base 4 is installed on the upper mold frame 1 accordingly, thereby adapting a set of outer molds 3 and inner mold base 4.

[0071] The positioning plate and the lower mold frame 2 are detachably connected for easy and quick switching.

[0072] This structural design allows for flexible selection of single-mold or dual-mold production modes based on production needs: dual-mold production can forge two pistons simultaneously, increasing production capacity; single-mold production can be used for processing small batches or special-specification pistons, improving the equipment's applicability and efficiency. Example 4

[0073] This embodiment provides a forging piston production mold, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0074] Furthermore, the guiding component includes:

[0075] Four guide pillars 13 are provided, and all four guide pillars 13 are fixedly mounted on the lower mold frame 2;

[0076] The guide sleeves 14 are matched in number with the guide posts 13. The guide sleeves 14 are fixedly mounted on the upper mold frame 1 and are configured to cooperate with the guide posts 13.

[0077] In this technical solution, four guide pillars 13 are fixed at the four corners of the lower mold frame 2 and penetrate through each layer of the mold frame. The guide sleeves 14 of the upper mold frame 1 are matched with the guide pillars 13 one by one to form a rigid guide structure.

[0078] When the press drives the upper mold frame 1 to move up and down, the guide sleeve 14 slides along the guide post 13, restricting the lateral displacement of the upper mold frame 1 and guiding the movement trajectory.

[0079] This structural design ensures that the inner mold of the upper mold holder 1 and the outer mold of the lower mold holder 2 3 strictly correspond during the forging process, while guaranteeing a stable movement trajectory and avoiding piston forging defects (such as dimensional deviations and irregular shapes) caused by misalignment, thus significantly improving forging accuracy and product qualification rate. Example 5

[0080] This embodiment provides a forging piston production mold, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0081] Furthermore, it also includes:

[0082] Shoulder 15, the lower outer circle of the mold base 5 has a shoulder 15;

[0083] A movable hole 16 is provided at the lower end of the outer mold 3. The movable hole 16 is configured to pass through the inner hole of the outer mold 3 and is matched with the shoulder 15.

[0084] The shoulder 15 is movably disposed within the movable hole 16.

[0085] In this technical solution, the shoulder 15 of the outer circle at the lower end of the mold base 5 matches the movable hole 16 at the lower end of the outer mold 3. The shoulder 15 can slide up and down in the movable hole 16, but cannot come out of the movable hole 16, thus limiting the up and down movement of the mold base 5.

[0086] The movable hole 16 is connected to the inner hole of the outer mold 3, which not only provides space for the mold bottom 5 to move, but also limits the maximum upward distance of the mold bottom 5 through the shoulder 15.

[0087] This structural design prevents the die base 5 from falling out of the outer die 3 during ejection or resetting, ensuring the stability of the fit between the die base 5 and the outer die 3. At the same time, the fit between the shoulder 15 and the movable hole 16 can help position the die base 5, ensuring the accurate position of the die base 5 during forging and further improving the dimensional accuracy of the piston. Example 6

[0088] This embodiment provides a forging piston production mold, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0089] Furthermore, the hardness of the inner mold base 4 is HRC55 or higher.

[0090] In this technical solution, the inner mold base 4 is directly connected to the inner mold and bears the axial pressure during the forging process. Because it is made of a material with a hardness of HRC55 or higher, the high hardness material can ensure that the inner mold base 4 is not easily deformed under huge pressure, thus maintaining the installation position accuracy of the inner mold. Example 7

[0091] This embodiment provides a forging piston production mold, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0092] Furthermore, the hardness of the insert 8 is HRC55 or higher.

[0093] In this technical solution, the insert 8 directly supports the die base 5 and bears the forging pressure transmitted by the die base 5. Because it is made of a material with a hardness of HRC55 or higher, the insert 8 is not easy to wear or deform under long-term stress, thus maintaining stable support for the die base 5.

[0094] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application specification can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A forging piston production die, comprising an upper die holder (1) and a lower die holder (2), characterized in that, Also includes: The outer mold (3) is fixedly installed on the upper end of the lower mold frame (2); The inner mold base (4) is fixedly installed at the lower end of the upper mold frame (1); The bottom of the mold (5) is movable inside the outer mold (3); The top material support plate (6) is located below the lower mold frame (2). The upper end of the top material support plate (6) is fixedly connected to the top rod (7), and the other end of the top rod (7) passes through the lower mold frame (2) and is fixedly connected to the lower end of the mold bottom (5). The upper mold frame (1) is mounted on the lower mold frame (2) by means of the guide assembly.

2. The forging piston production die according to claim 1, characterized in that, Also includes: Insert (8) is embedded in the lower mold frame (2) to support the mold bottom (5). The insert (8) has through holes for the movement of the ejector rod (7). The number of inserts (8) corresponds to the number of ejector rods (7).

3. The forging piston production die according to claim 2, characterized in that, Also includes: Positioning pits (9): The upper mold frame (1) and the lower mold frame (2) are both provided with corresponding positioning pits (9); Positioning step (10), the lower end of the outer mold (3) has positioning step (10); The first positioning plate (11) is used to divide the positioning pit (9) of the lower mold frame (2) into two positioning holes that match the positioning steps (10); The second positioning plate (12) is provided in two, which is used to make the positioning pit (9) of the lower mold frame (2) form a positioning hole that matches the positioning step (10). The first positioning plate (11) and the second positioning plate (12) are detachably connected to the lower mold frame (2). When the first positioning plate (11) is fixedly connected to the lower mold frame (2), two sets of the outer mold (3) and the inner mold base (4) are provided. When the second positioning plate (12) is fixedly connected to the lower mold frame (2), one set of the outer mold (3) and the inner mold base (4) is provided.

4. A forging piston production die according to claim 3, characterized in that, The guiding component includes: The guide pillars (13) are provided in four pieces, and all four guide pillars (13) are fixedly installed on the lower mold frame (2); Guide sleeves (14) are matched in number with guide posts (13). The guide sleeves (14) are fixedly mounted on the upper mold frame (1) and are configured to cooperate with the guide posts (13).

5. A forging piston production die according to claim 4, characterized in that, Also includes: Shoulder (15), the lower outer circle of the mold base (5) has a shoulder (15); A movable hole (16) is provided at the lower end of the outer mold (3). The movable hole (16) is connected to the inner hole of the outer mold (3). The movable hole (16) is matched with the shoulder (15). The shoulder (15) is movably disposed within the movable hole (16).

6. A forging piston production die according to claim 5, characterized in that: The hardness of the inner mold base (4) is HRC55 or higher.

7. A forging piston production die according to claim 6, characterized in that: The hardness of the insert (8) is HRC55 or higher.

Images