Cold extrusion forming device for manufacturing cylinder block

Abstract

The invention discloses a cold extrusion forming device for manufacturing a cylinder block, and relates to the related technical field of cold extrusion forming, the cold extrusion forming device comprises a device main body composed of a lower die and an upper die, a detachable die is detachably mounted on the lower die, a positioning frame is slidably mounted in the detachable die, and a positioning groove corresponding to the positioning frame is formed in the lower die; a butt joint column and a reset column which are used for pushing the positioning frame are installed in the lower die in a sliding mode. By optimizing the structural design, the problems that a traditional mold is tedious in replacement and inaccurate in positioning are effectively solved; a first driver of the lower die drives a transmission frame to drive a butt joint column and a reset column to slide, clamping or separation of a positioning frame and a positioning groove can be rapidly controlled, convenient disassembly and assembly of the detachable die are achieved in cooperation with a die groove and a threaded hole, and bolts do not need to be disassembled one by one. The second driver of the upper die drives the limiting plate to slide into or break away from the position control groove, rapid fixing and replacement of the punch are achieved, the die replacement time is greatly shortened, and the equipment utilization rate is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold extrusion forming, in particular to a cold extrusion forming device for manufacturing a cylinder seat. BACKGROUND

[0002] In the field of mechanical manufacturing, the cylinder seat as the core component of internal combustion engines, pneumatic devices and the like directly affects the running stability of the equipment in terms of structural precision and mechanical properties. Cold extrusion forming technology has become the mainstream process for batch manufacturing of cylinder seats due to its high material utilization rate, fast production efficiency, high workpiece strength and other advantages. This technology applies external force to the metal blank through a die to cause plastic deformation of the blank at room temperature and form the required shape. Therefore, the quality and stability of the die are the key to ensuring the forming precision of the cylinder seat, which drives the development of cold extrusion forming devices towards die durability and convenient replacement.

[0003] The existing cold extrusion forming device for manufacturing a cylinder seat mainly consists of a frame, a punch (upper die), a lower die, a driving mechanism (such as a hydraulic cylinder) and a positioning assembly. In use, the metal blank is placed in the cavity of the lower die, the driving mechanism drives the punch to move downward, and the extrusion external force is applied to the blank through the cooperation of the punch and the lower die, so that the blank is formed into a cylinder seat blank under the constraint of the die cavity. The punch and the lower die, as the core forming components, are fixed on the upper and lower mounting positions of the frame respectively through a plurality of bolts, and the extrusion load is transmitted through the rigid connection of the bolts to form a complete production process of "driving-extrusion-forming", which meets the batch cold extrusion manufacturing requirements of the cylinder seat.

[0004] The existing cold extrusion forming device has obvious drawbacks in actual production. On the one hand, during the cold extrusion process, the punch and the lower die need to withstand huge extrusion stress and friction force. After long-term use, the surface of the die is prone to wear, cracks and other damage. The die material has high hardness and complex structure, making it difficult to repair. In actual production, the die is usually replaced directly to ensure the forming precision. On the other hand, when the die is replaced, the plurality of bolts that fix the punch and the lower die need to be disassembled one by one, which is time-consuming and tedious, especially during the replacement gap of batch production. The long replacement time will reduce the equipment utilization rate and affect the production efficiency. In addition, frequent disassembly and assembly of the bolts can cause the threads of the mounting positions to slip and the positioning reference to shift. When reinstalled, the concentricity of the die needs to be recalibrated, further increasing the replacement difficulty and making it difficult to balance the dual demands of die replacement efficiency and forming stability. SUMMARY

[0005] Therefore, the present application aims to provide a cold extrusion forming device for manufacturing a cylinder seat to solve the technical problems mentioned in the background.

[0006] To achieve the above object, the application provides the following technical scheme: a cold extrusion forming device for cylinder block manufacturing, comprising a device main body composed of a lower die and an upper die, a detachable die is detachably installed on the lower die, a positioning frame is slidably installed in the detachable die, a positioning groove corresponding to the positioning frame is formed in the lower die, a butt joint column and a reset column for pushing the positioning frame are slidably installed in the lower die, a transmission frame fixedly connected with the butt joint column and the reset column is slidably installed in the lower die, and a first driver for driving the transmission frame to slide is arranged in the lower die;

[0007] A punch is detachably installed on the bottom of the upper die, an installation column slidably connected with the upper die is installed on the top of the punch, a control groove is formed in the installation column, a limiting plate abutting against the top surface of the upper die is slidably installed in the control groove, and a second driver for driving the limiting plate to slide is arranged on the top surface of the upper die.

[0008] By adopting the above technical scheme, the transmission frame links the butt joint column and the reset column to control the position of the positioning frame, and the limiting plate cooperates with the control groove to fix the punch, so that the mold can be replaced without disassembling the bolts.

[0009] Further, a mold groove corresponding to the detachable die is formed in the lower die, and a plurality of threaded holes are symmetrically installed on the top of the detachable die for subsequent installation of lifting rings.

[0010] By adopting the above technical scheme, the mold groove is adapted to the installation of the detachable die, the threaded holes on the top are convenient for the installation of the lifting rings, the detachable die can be hoisted and replaced, the manual carrying strength is reduced, and the convenience of mold assembly and disassembly is improved.

[0011] Further, the cross section of the positioning frame is designed in the shape of a "cross", the end edge of the positioning frame near the positioning groove is designed in an oblique angle, and the top surface of the positioning frame abuts against the top surface of the positioning groove.

[0012] By adopting the above technical scheme, the cross section of the positioning frame closely abuts against the positioning groove, the end oblique angle is convenient for sliding, the top surface abuts against the top surface of the positioning groove, multiple limiting positions prevent the detachable die from deviating, and the forming precision is ensured.

[0013] Further, the length of the positioning frame is the same as the length of the detachable die, the end surface of the positioning frame in the positioning groove abuts against the end surface of the reset column, and the diameter of the reset column is greater than the width of the positioning frame.

[0014] By adopting the above technical scheme, it is ensured that the reset column does not invade the space of the detachable die when pushing the positioning frame to reset, and interference during disassembly is avoided.

[0015] Further, a positioning hole corresponding to the butt joint column is formed in the outer wall of the detachable die, and the opening edge of the positioning hole and the end opening of the butt joint column are designed in an oblique angle.

[0016] By adopting the technical scheme, the butt joint column can be precisely inserted into the positioning hole, the detachable mold positioning is assisted, and the positioning efficiency and fixing stability during installation are improved.

[0017] Further, the first driver comprises a transmission screw rod rotatably installed in the lower mold and threadedly connected with the outer wall of the transmission frame, a bevel gear one is fixedly installed at the end of the transmission screw rod, a bevel gear two is rotatably installed at the top of the lower mold, and the bevel gear two is meshingly connected with the bevel gear one, and a driving block is rotatably installed at the end of the bevel gear two.

[0018] By adopting the technical scheme, the transmission frame is driven to stably slide, the power transmission is not loose, and the positioning frame and the butt joint column are accurately controllable.

[0019] Further, the lower mold is provided with an operation groove corresponding to the driving block at the top of the lower mold, and the diameter of the operation groove is greater than the diameter of the driving block.

[0020] By adopting the technical scheme, space is reserved for tool operation, the driving block is conveniently rotated to control the transmission frame, and the driving operation for mold replacement is simplified.

[0021] Further, the top corner of the limiting plate is designed as an oblique angle, the top surface of the limiting plate is attached to the top surface of the control groove, and the length of the control groove is greater than the width of the limiting plate.

[0022] By adopting the technical scheme, the oblique angle of the top corner of the limiting plate facilitates sliding into the control groove, the top surface is attached to the groove body to fix the punch, the length of the control groove is adapted to the sliding demand, and the jamming during punch replacement is reduced.

[0023] Further, the second driver comprises two groups of transmission plates slidably installed at the top of the upper mold, a connecting frame is installed between the two groups of transmission plates, a limiting plate is installed on one side of the outer wall of the transmission plate, a power screw rod is rotatably installed at the top of the upper mold and threadedly connected with the transmission plate, and a driving block is fixedly installed at the end of the power screw rod.

[0024] By adopting the technical scheme, the power screw rod drives the transmission plate to move synchronously through the connecting frame, the limiting plate is symmetrically stressed to slide into the control groove, the limiting support guides and prevents deviation, and the punch is fixed firmly.

[0025] Further, the top of the upper mold is provided with a limiting support corresponding to the transmission plate, and one group of the transmission plates not threadedly connected with the power screw rod is slidably connected with the limiting support.

[0026] By adopting the technical scheme, the limiting support is slidably connected with the transmission plate to limit the sliding track, and the power screw rod is driven to ensure synchronous movement of the two groups of transmission plates, improve the positioning accuracy of the punch and the disassembly and assembly smoothness.

[0027] In summary, the present application mainly has the following beneficial effects:

[0028] 1、The present application effectively solves the problems of traditional mold replacement complexity and inaccurate positioning by setting an optimized structure design; the first driver of the lower mold drives the transmission frame to drive the butt joint column and the reset column to slide, which can quickly control the clamping or separation of the positioning frame and the positioning groove, and cooperate with the mold groove and the threaded hole to realize the convenient disassembly and assembly of the detachable mold without the need to disassemble the bolts one by one; the second driver of the upper mold drives the limiting plate to slide into or out of the control groove, realizing the quick fixing and replacement of the punch, greatly shortening the mold replacement time and improving the equipment utilization rate;

[0029] 2、The positioning frame is designed in a "cross" shape and closely fits with the positioning groove, and the butt joint column is inserted into the positioning hole to assist in limiting, ensuring accurate installation of the detachable mold; the limiting plate and the control groove fit to fix the punch, ensuring the concentricity of the punch and the lower mold and reducing the forming error; the bevel guide structure reduces the operation jamming, the stable transmission of the transmission screw and bevel gear and the power screw and transmission plate reduces the wear of the parts, adapts to high-frequency replacement scene, and takes into account the replacement efficiency, forming accuracy and operation convenience, prolonging the service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structure schematic view of the upper mold when the upper mold is pressed down;

[0031] Figure 2 It is a structure schematic view of the upper mold after moving up;

[0032] Figure 3 It is a structure schematic view of the detachable mold and other components after disassembly;

[0033] Figure 4 It is a structure schematic view of the lower mold after being cut open;

[0034] Figure 5 It is a structure schematic view of the detachable mold and other components such as transmission frame, reset column and positioning frame;

[0035] Figure 6 It is a structure schematic view of the upper mold after being cut open;

[0036] Figure 7 It is a structure schematic view of the upper mold after disassembly of the components;

[0037] Figure 8 It is a structure schematic view of the transmission plate after moving;

[0038] Figure 9 It is a structure schematic view of the threaded hole.

[0039] In the diagram: 1. Lower mold; 2. Upper mold; 3. Column; 4. Punch; 5. Demountable mold; 52. Threaded hole; 51. Mold groove; 6. Cavity; 7. Positioning frame; 71. Positioning groove; 8. Positioning hole; 9. Connecting column; 10. Transmission frame; 11. Reset column; 12. Transmission screw; 13. Bevel gear one; 14. Bevel gear two; 15. Drive block; 16. Mounting column; 17. Control groove; 18. Transmission plate; 19. Limiting plate; 20. Connecting frame; 21. Power screw; 22. Limiting support. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] The embodiments of the present invention will now be described.

[0042] A cold extrusion molding apparatus for manufacturing cylinder blocks, such as Figure 1 - Figure 9 As shown, the main body of the device includes components such as a lower mold 1, an upper mold 2, a column 3, a punch 4, and a cavity 6.

[0043] Among them, the lower mold 1 and the upper mold 2 are connected by the column 3 to complete the cold extrusion forming of the cylinder seat; the lower mold 1 is detachably installed with a detachable mold 5, and the detachable mold 5 is provided with a cavity 6 for placing the metal billet and constraining its forming shape.

[0044] A positioning frame 7 is slidably installed inside the detachable mold 5, and a positioning groove 71 corresponding to the positioning frame 7 is opened in the lower mold 1. The positioning frame 7 and the positioning groove 71 cooperate to fix the position of the detachable mold 5.

[0045] For example, a docking post 9 and a reset post 11 are slidably installed in the lower mold 1. Both are used to push the positioning frame 7. The difference is that the docking post 9 is used to push the positioning frame 7 out of the detachable mold 5, while the reset post 11 is used to push the positioning frame 7 back into the detachable mold 5.

[0046] In some examples, a transmission frame 10 is slidably installed inside the lower mold 1. The transmission frame 10 is fixedly connected to the docking post 9 and the reset post 11. By setting the transmission frame 10, the docking post 9 and the reset post 11 are both restricted by the transmission frame 10 and can move synchronously. A first driver is provided inside the lower mold 1. The first driver is used to drive the transmission frame 10 to slide, thereby driving the docking post 9 and the reset post 11 to move.

[0047] The punch 4 is detachably installed at the bottom of the upper die 2 in the embodiment, and the punch 4 applies extrusion force to the blank in cooperation with the detachable die 5; meanwhile, a mounting column 16 is installed at the top of the punch 4, which is in sliding connection with the upper die 2, and a control slot 17 is further formed in the mounting column 16; a limiting plate 19 is slidingly installed in the control slot 17, and the bottom surface of the limiting plate 19 is attached to the top surface of the upper die 2 for fixing the punch 4; and a second driver is arranged on the top surface of the upper die 2 for driving the limiting plate 19 to slide.

[0048] A die groove 51 corresponding to the detachable die 5 is formed in the lower die 1 in some examples, and the die groove 51 provides installation space for the detachable die 5; meanwhile, a plurality of sets of threaded holes 52 are symmetrically installed at the top of the detachable die 5 for subsequent installation of lifting rings to facilitate hoisting and replacement of the detachable die 5;

[0049] The positioning frame 7 in the embodiment has a cross-shaped design in cross section, which enhances the fixing effect of the detachable die 5; meanwhile, the end corners of the positioning frame 7 close to the positioning groove 71 are designed at an angle, which facilitates sliding into the positioning groove 71; the top surface of the positioning frame 7 is attached to the top surface of the positioning groove 71, ensuring firm fixation; and the length of the positioning frame 7 is the same as the length of the detachable die 5, which ensures that the positioning frame 7 will not affect the sliding of the detachable die 5 out of the die groove 51 after sliding into the detachable die 5.

[0050] Secondly, the end surface of the positioning frame 7 in the positioning groove 71 is attached to the end surface of the reset column 11, and the other end surface is attached to the end surface of the butt joint column 9; meanwhile, the diameter of the reset column 11 is greater than the width of the positioning frame 7, which ensures that the butt joint column 9 and the reset column 11 can stably push the positioning frame 7, and at the same time, ensures that the reset column 11 will not slide into the detachable die 5, thereby avoiding the reset column 11 affecting the operation of detaching the detachable die 5.

[0051] The positioning hole 8 corresponding to the butt joint column 9 is formed in the outer wall of the detachable die 5 in the embodiment, and the opening corners of the positioning hole 8 and the end of the butt joint column 9 are designed at an angle, which facilitates the insertion of the butt joint column 9 into the positioning hole 8 and enhances the positioning stability of the detachable die 5.

[0052] Specifically, the first driver in the embodiment includes a transmission screw 12, a bevel gear one 13, a bevel gear two 14, and a driving block 15.

[0053] The transmission screw 12 is rotatably installed in the lower die 1 and is in threaded connection with the outer wall of the transmission frame 10; the bevel gear one 13 is fixedly installed at the end of the transmission screw 12; the bevel gear two 14 is rotatably installed at the top of the lower die 1 and is in meshing connection with the bevel gear one 13; the driving block 15 is installed at the end of the bevel gear two 14 and is in rotary connection with the lower die 1; and an operation slot corresponding to the driving block 15 is formed in the top of the lower die 1, and the diameter of the operation slot is greater than the diameter of the driving block 15, which facilitates the operation of the driving block 15.

[0054] In some examples, the driving block 15 can be designed as a hexagonal block, and a user can rotate the driving block 15 by using a corresponding tool.

[0055] Of course, in other examples, the driving block 15 can also be designed as a circular pie provided with a hexagonal groove, and the driving block 15 is not directly fully defined in the embodiment.

[0056] The top corner of the limiting plate 19 in the embodiment is designed as an oblique angle, which facilitates the sliding of the limiting plate 19 into the limiting groove 17; at the same time, the top surface of the limiting plate 19 is attached to the top surface of the limiting groove 17, so as to ensure the fixing of the position of the punch 4 after installation; at the same time, the length of the limiting groove 17 is greater than the width of the limiting plate 19, and the limiting groove 17 provides sufficient sliding space for the limiting plate 19.

[0057] Specifically, the second driver in the embodiment includes a transmission plate 18, a connecting frame 20, a power screw 21, and a driving block 15.

[0058] Two groups of the transmission plate 18 are slidingly installed on the top of the upper die 2, and the connecting frame 20 is installed between the two groups of the transmission plate 18 and fixedly connected with the transmission plate 18.

[0059] Secondly, the limiting plate 19 is installed on one side of the outer wall of the transmission plate 18; and the power screw 21 is rotatably installed on the top of the upper die 2 and threadedly connected with the transmission plate 18, so that the transmission plate 18 starts to slide under the action of the screw principle by rotating the power screw 21, and the driving block 15 is fixedly installed on the end of the power screw 21, so as to ensure that the user can smoothly rotate the power screw 21.

[0060] And the limiting support 22 is installed on the top of the upper die 2, and the limiting support 22 is slidingly connected with one group of the transmission plate 18 which is not threadedly connected with the power screw 21, so as to ensure the stable sliding of the transmission plate 18.

[0061] Through the cooperation of the above-mentioned components, when the removable die 5 is replaced, the first driver drives the transmission frame 10 to drive the butt joint column 9 to separate from the positioning hole 8, and the reset column 11 drives the positioning frame 7 to separate from the positioning groove 71, so that the removable die 5 can be removed; reverse operation is performed after replacement to realize fixation; when the punch 4 is replaced, the second driver drives the transmission plate 18 to drive the limiting plate 19 to separate from the limiting groove 17, and the punch 4 is removed; reverse operation is performed after replacement to realize fixation, so as to realize the rapid disassembly and assembly of the mold, and take into account the replacement efficiency and forming stability.

[0062] The working principle of the present application is as follows: when the detachable die 5 needs to be replaced due to wear, first, reverse rotate the driving block 15 of the lower die 1, and the transmission frame 10 drives the butt joint column 9 and the reset column 11 to slide reversely; the butt joint column 9 is pulled out of the positioning hole 8, and the positioning is released; at the same time, the reset column 11 pushes the positioning frame 7, so that the positioning frame 7 is pushed out of the positioning groove 71 by the reset column 11, at this time, the detachable die 5 is no longer constrained, then the lifting ring is installed through the threaded hole 52, and the detachable die 5 is lifted out of the die groove 51 by using a lifting appliance;

[0063] Then, after the new detachable die 5 is put in, the driving block 15 in the operation groove of the lower die 1 is rotated, driving the bevel gear two 14 to rotate, because the bevel gear two 14 is engaged with the bevel gear one 13, the bevel gear one 13 drives the transmission screw 12 to rotate; because the transmission screw 12 is screw-connected with the transmission frame 10, the transmission screw 12 drives the transmission frame 10 and the butt joint column 9 and the reset column 11 at both ends of the transmission frame 10 to start sliding; after the end of the butt joint column 9 is inserted into the positioning hole 8, the detachable die 5 is positioned;

[0064] During the process that the end of the butt joint column 9 enters into the positioning hole 8, the end of the butt joint column 9 pushes the positioning frame 7, so that the end of the positioning frame 7 slides into the positioning groove 71, at this time, the top surface of the positioning frame 7 is attached to the top surface of the positioning groove 71, further ensuring the fixity of the position of the detachable die 5;

[0065] When the punch 4 needs to be replaced, the driving block 15 of the upper die 2 is reversely rotated, so that the power screw 21 drives the transmission plate 18 to move, causing the limiting plate 19 to slide out of the limiting groove 17, at this time, the punch 4 is no longer fixed, and can be directly taken off;

[0066] Then, the installation column 16 of the new punch 4 is inserted into the upper die 2, and then the driving block 15 at the top of the upper die 2 is rotated, driving the power screw 21 to rotate; because the power screw 21 is screw-connected with a group of transmission plates 18, the transmission plate 18 drives another group of transmission plates 18 to slide along the limiting support 22 through the connecting frame 20, and the two groups of transmission plates 18 synchronously push the limiting plate 19 to slide into the limiting groove 17 of the installation column 16; because the top corner of the limiting plate 19 is designed to be inclined to facilitate guiding, the top surface of the limiting plate 19 is attached to the top surface of the limiting groove 17, and the punch 4 is firmly fixed at the bottom of the upper die 2;

[0067] During the cold extrusion forming process, first, the metal blank is put into the cavity 6 of the detachable die 5, the device drives the upper die 2 to move downward along the stand column 3, the punch 4 is closed with the detachable die 5, and a huge pressure is applied to the blank; the blank is plastically deformed at room temperature, and forms the shape of the cylinder seat under the constraint of the cavity 6.

[0068] Although the embodiments of the present application have been shown and described, the specific embodiments are merely exemplary and are not to be construed as limiting the present application, and the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations to the embodiments without creative contribution after reading the specification, and as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A cold extrusion forming apparatus for manufacturing cylinder seats, characterized in that, The device body includes a lower mold (1) and an upper mold (2). A detachable mold (5) is detachably installed on the lower mold (1), and a positioning frame (7) is slidably installed inside the detachable mold (5). A positioning groove (71) corresponding to the positioning frame (7) is opened inside the lower mold (1). A docking column (9) and a reset column (11) for pushing the positioning frame (7) are slidably installed inside the lower mold (1). A transmission frame (10) fixedly connected to the docking column (9) and the reset column (11) is slidably installed inside the lower mold (1). A first driver for driving the transmission frame (10) to slide is provided inside the lower mold (1). The upper mold (2) is detachably mounted with a punch (4) at its bottom, and a mounting post (16) that is slidably connected to the upper mold (2) is mounted on the top of the punch (4). A control groove (17) is provided on the mounting post (16). A limiting plate (19) that is in contact with the top surface of the upper mold (2) is slidably mounted in the control groove (17). A second driver is provided on the top surface of the upper mold (2) for driving the limiting plate (19) to slide.

2. The cold extrusion forming apparatus for manufacturing cylinder seats according to claim 1, characterized in that: The lower mold (1) has a mold groove (51) corresponding to the detachable mold (5), and the top of the detachable mold (5) is symmetrically equipped with multiple sets of threaded holes (52) for subsequent installation of lifting rings.

3. The cold extrusion forming apparatus for manufacturing cylinder seats according to claim 1, characterized in that: The positioning frame (7) has a cross-shaped design, and the corners of the positioning frame (7) near the end of the positioning groove (71) are angled, and the top surface of the positioning frame (7) is in contact with the top surface of the positioning groove (71).

4. The cold extrusion forming apparatus for manufacturing cylinder seats according to claim 1, characterized in that: The length of the positioning frame (7) is the same as the length of the detachable mold (5), and the end face of the positioning frame (7) located in the positioning groove (71) is in contact with the end face of the reset column (11), and the diameter of the reset column (11) is greater than the width of the positioning frame (7).

5. A cold extrusion forming apparatus for manufacturing cylinder seats according to claim 1, characterized in that: The outer wall of the detachable mold (5) is provided with positioning holes (8) corresponding to the docking post (9), and the opening corners of the positioning holes (8) and the end openings of the docking post (9) are both designed at bevel angles.

6. A cold extrusion forming apparatus for manufacturing cylinder seats according to claim 1, characterized in that: The first driver includes a transmission screw (12) rotatably mounted inside the lower mold (1) and threadedly connected to the outer wall of the transmission frame (10), and a bevel gear (13) is fixedly mounted at the end of the transmission screw (12), and a bevel gear (14) meshing with the bevel gear (13) is rotatably mounted inside the top of the lower mold (1), and a drive block (15) rotatably connected to the lower mold (1) is mounted at the end of the bevel gear (14).

7. A cold extrusion forming apparatus for manufacturing cylinder seats according to claim 6, characterized in that: The lower mold (1) has an operation slot at its top that corresponds to the drive block (15), and the diameter of the operation slot is greater than the diameter of the drive block (15).

8. A cold extrusion forming apparatus for manufacturing cylinder seats according to claim 1, characterized in that: The top corner of the limiting plate (19) is designed with an angle, and the top surface of the limiting plate (19) is in contact with the top surface of the control groove (17), and the length of the control groove (17) is greater than the width of the limiting plate (19).

9. A cold extrusion forming apparatus for manufacturing cylinder seats according to claim 1, characterized in that: The second driver includes two sets of transmission plates (18) slidably mounted on the top of the upper mold (2), a connecting frame (20) is installed between the two sets of transmission plates (18), and a limit plate (19) is installed on the outer wall of one side of the transmission plate (18). A power screw (21) threadedly connected to the transmission plate (18) is rotatably mounted on the top of the upper mold (2), and a drive block (15) is fixedly mounted on the end of the power screw (21).

10. A cold extrusion forming apparatus for manufacturing cylinder seats according to claim 9, characterized in that: The upper mold (2) is equipped with a limiting support (22) corresponding to the transmission plate (18) on its top. A set of the transmission plates (18) that are not threaded to the power screw (21) are slidably connected to the limiting support (22).

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