Multi-directional stamping self-locking separating and combining forging die
By setting self-locking devices at the upper and lower ends of the forging die, and using hydraulic cylinders to drive the punch to achieve multi-directional stamping, the problem of small and medium-sized enterprises having difficulty forging larger forgings has been solved, and the efficient forming and mechanical performance improvement of larger forgings have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-09
- Publication Date
- 2026-04-10
AI Technical Summary
Small and medium-sized enterprises often lack the equipment to meet the forging needs of larger forgings, resulting in problems such as insufficient filling, insufficient material, die run-out, and coarse metal grains.
Self-locking devices are installed at the upper and lower ends of the forging die, and the punch is driven by a hydraulic cylinder to achieve multi-directional punching, and concentrated power is used to forge larger forgings.
This technology enables the forging of larger forgings using a smaller power press, avoiding material leakage and flash, and improving the forming effect and mechanical properties of the forgings.
Smart Images
Figure CN121820520A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a multi-directional stamping splitting and joining forging die, specifically a multi-directional stamping self-locking splitting and joining forging die, belonging to the field of metal hot extrusion technology. Background Technology
[0002] Hot extrusion forging technology utilizes the principle of thermoplastic forming of metals. A hot metal blank is placed into a die cavity fixed on a press. Under the powerful punching pressure, the metal is forced to undergo plastic extrusion deformation and flow within the die cavity, thereby obtaining forgings of the desired shape, size, and mechanical properties. Its advantages include good metal formability, ease of molding, fine grains, and high strength. However, in actual production, for some small and medium-sized enterprises with limited investment, the equipment may not meet product demands. For example, a press of a certain tonnage can only meet the extrusion pressure for forgings below that tonnage. If the forging is slightly larger, insufficient filling, insufficient material (unclear outline), and subsequent rework may occur. Secondly, insufficient deformation force and coarse metal grains lead to decreased mechanical properties of the forgings (easy to crack, insufficient strength). Thirdly, insufficient constraint on the die results in material leakage and flash at the die connection points (wasting material and increasing processing steps). To enable existing equipment to adapt to forging of a wider range of products, the existing forging dies must be optimized. Summary of the Invention
[0003] To address the problems raised in the background art, the present invention provides a multi-directional stamping self-locking splitting and joining forging die, wherein self-locking devices are respectively set at the upper and lower ends of the forging die, so that the press concentrates the power for forging, thereby achieving the purpose of forging larger forgings with a smaller power press.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a multi-directional stamping self-locking split-and-assemble forging die, comprising: an outer die, a core die, a punch, a hydraulic cylinder, a die base, and a forging blank. The outer die is configured as a left half outer die and a right half outer die, and the core die is configured as a left half core die and a right half core die. Correspondingly, the left half outer die covers the left half core die to form a left half forging die, and the right half outer die covers the right half core die to form a right half forging die. The left and right half forging dies are combined to form a forging die. The forging blank is placed in the die cavity of the forging die. The punch includes an upper punch, a front punch, and a rear punch. The hydraulic cylinder drives the punch to press the forging blank. The invention is characterized in that: The back of the left and right half forging dies is divided into three areas from top to bottom. The upper area is a slope that slopes outward from top to bottom, the lower area is a slope that slopes outward from bottom to top, and the middle area is provided with a slider groove, which forms an up-down moving pair with the slider provided at the end of the single rod of the wedge hydraulic cylinder. The bottom surfaces of the left and right halves of the forging die are respectively provided with dovetails; The die base is located below the forging die. The die base has a square lower locking sleeve hole. Dovetail grooves are provided on the upper surface of both sides of the hole in the left and right directions. The left dovetail groove engages with a dovetail on the bottom surface of the left half of the forging die to form a left-side sliding joint. The right dovetail groove engages with a dovetail on the bottom surface of the right half of the forging die to form a right-side sliding joint. The upper and lower sections of the lower locking sleeve hole are provided with a slope that is larger at the top and smaller at the bottom, which meshes with the slope of the lower area on the back of the forging die; A lifting platform and a shoulder are provided inside the lower locking sleeve hole; After the lifting platform rises, its upper surface is level with the bottom of the dovetail groove; after it descends, its lower surface rests on the shoulder. An upper punch and an upper punch seat are provided above the forging die, and an upper locking mechanism is provided on the upper punch seat; The upper locking mechanism includes: an upper locking sleeve, a hanging rod, a locking block, and a cylinder; The upper end of the boom is fixed to the upper punch seat, and the lower end is provided with a lifting clip. The upper locking sleeve is provided with a vertical through-hole for the lifting rod, through which the lifting rod passes; The upper locking sleeve has a slope that is smaller at the top and larger at the bottom on its left and right inner sides, respectively. The cylinder is disposed on the bottom surface of the upper locking sleeve, and the locking block is disposed at the end of the single rod of the cylinder. The cylinder drives the locking block to move horizontally through the single rod. The locking block moves horizontally inward and engages with the hanging clamp. The lower end of the hanging rod is connected to the locking block at a right angle. The hanging rod drives the upper locking sleeve to move vertically. Moving downward drives the upper locking sleeve to lock the upper end of the forging die. The upper slope of the back of the forging die engages with the slope of the inner side of the upper locking sleeve. Moving upward drives the upper locking sleeve to disengage from the upper end of the forging die. Mold opening process: a. When the locking mechanism is opened, the cylinder pushes the locking block to move horizontally inward, and the locking block engages with the hanging clamp. The upper punch seat drives the upper locking sleeve to move upward through the hanging rod. The upper locking sleeve separates from the upper end of the forging die. The lifting platform rises in the lower locking sleeve hole until the upper surface of the lifting platform is level with the bottom of the dovetail groove. The forging die moves upward with the lifting platform, and its lower end leaves the lower locking sleeve hole. The dovetail on the forging die is placed in the dovetail groove. b. Opening the mold: The wedge-pushing hydraulic cylinder pulls the left and right halves of the forging mold in opposite directions, and the left and right halves of the forging mold slide in opposite directions and separate in the dovetail groove. Mold closing process: a. Mold assembly: The wedge-push hydraulic cylinder pushes the left half of the forging die and the right half of the forging die towards each other along the dovetail groove onto the lifting platform, and assembles them into the forging die. b. Locking the forging die: The forging die descends with the lifting platform in the lower locking sleeve hole. The lower part of the lifting platform is placed on the shoulder. The lower locking sleeve hole locks the lower end of the forging die. The upper punch seat drives the upper locking sleeve to move downward through the lifting rod, locking the upper end of the forging die. The cylinder pulls the clamping block to move horizontally outward, and the clamping block separates from the lifting clamp.
[0005] Furthermore, the lifting rod hole is provided in multiple ways, and correspondingly, the lifting rod and the locking block are provided in multiple ways.
[0006] Furthermore, a pressing block is provided below the upper punch seat between the upper punch seat and the upper locking sleeve. After the lifting rod separates from the locking block, the upper punch seat presses the upper locking sleeve downward through the pressing block.
[0007] Furthermore, the vertical angle between the slopes of the upper and lower regions on the back of the left and right half forging dies and the slope of the inner side of the upper locking sleeve and the lower locking sleeve hole is set to 2° to 6°.
[0008] The present invention provides self-locking devices at the upper and lower ends of the forging die. After the left and right halves of the forging die are closed, the upper and lower locking devices lock the upper and lower ends of the forging die respectively. The forging billet is put into the upper port of the die cavity. The front, rear and upper punches are driven by their respective hydraulic cylinders to concentrate the power forging, so as to achieve the purpose of forging a larger forging with a smaller power press.
[0009] This invention has the advantages of novel design, stable structure, good molding effect, no material leakage and no flash. Attached Figure Description
[0010] Appendix Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention; Appendix Figure 2 For the appendix Figure 1 Schematic diagram of the cross-sectional structure at section AA; Appendix Figure 3 For the appendix Figure 1 Schematic diagram of the cross-sectional structure at section BB; Appendix Figure 4 The image in the middle left is an appendix. Figure 1 The right image is an enlarged view of section I in the middle, and the left image is a diagram showing direction C in the left image. Appendix Figure 5 This is a schematic diagram showing the initial mold-closing state of the left and right halves of the mold; Appendix Figure 6 This is a schematic diagram showing the locking state of the lower end of the forging die; Appendix Figure 7 This is a schematic diagram showing the locking state of the upper end of the forging die; Appendix Figure 8 This is a schematic diagram of the upward thrust head lifting state; Appendix Figure 9A schematic diagram showing the state of the locking sleeve when the pressure block is tightened; Appendix Figure 10 This is a schematic diagram showing the state of the forging billet placed in the mold cavity; Appendix Figure 11 This is a schematic diagram showing the state of the forging blank being pressed by the upper punch. Appendix Figure 12 This diagram illustrates the forging state completed by the upper punch, front punch, and rear punch.
[0011] In the attached diagram, 1 is the mold base, 101 is the inner slope of the lower locking sleeve hole, 2 is the bracket, 3 is the two halves of the forging mold, 301 is the outer upper slope, 302 is the outer lower slope, 303 is the dovetail, 4 is the wedge-pushing hydraulic cylinder, 401 is the slider, 4' is the lifting hydraulic cylinder, 5 is the core mold, 6 is the upper locking sleeve, 601 is the inner slope of the upper locking sleeve, 7 is the upper punch seat, 8 is the lifting rod, 801 is the lifting clamp, 9 is the pressure block, 10 is the cylinder, 1001 is the chuck, 11 is the upper punch, 12 is the slider frame, 13 is the lifting platform, 14 is the front and rear punches, 15 is the forging billet, and 16 is the forging. Detailed Implementation
[0012] The present invention will be further explained and described below with reference to the accompanying drawings: As attached Figures 1 to 12 This shows the process from mold closing to forging completion.
[0013] Appendix Figure 1 As shown, the core mold 5 is embedded in the inner cavity of the outer mold 3. The upper punch 11 is connected to the upper punch seat 7. The upper end of the lifting rod 8 is fixedly connected to the lower part of the upper punch seat 7. The lower end of the lifting rod 8 passes through the through hole provided on the upper locking sleeve 6. The cylinder 10 below the upper locking sleeve 6 pushes the latch 1001 to engage with the hanging clamp 801 at the lower end of the lifting rod 8 at a right angle, so that the upper locking sleeve 6 is connected to the upper punch seat 7. The upper punch seat 7 drives the upper locking sleeve 6 to move up and down. The lower mold base 1 is provided with a lower locking sleeve hole at the part opposite to the upper punch 11. The lifting hydraulic cylinder 4' is provided at the bottom of the lower locking hole to drive the lifting platform 13 to move up and down. The two wedge-push hydraulic cylinders 4 are fixed on the bracket 2.
[0014] As attached Figure 2 , 3 The figure shown is a cross-sectional view from both directions AA and BB in Figure 1.
[0015] As attached Figure 4 The left image shows the attached image. Figure 1 The enlarged view of part I in the middle, the right image is a view of direction C in the left image. The state after the clamp 1001 and the hanging clamp 801 are engaged in the left image is the device for connecting and separating the upper locking sleeve 6 and the hanging rod 8.
[0016] As attached Figure 1 and 5As shown, the lifting hydraulic cylinder 4' drives the lifting platform 13 to rise, and the wedge-push hydraulic cylinder 4 fixed on the bracket 2 pushes the dovetails 303 on the bottom surface of the two halves of the forging die 3 to move relative to each other in the dovetail groove on the die base 1 to form a complete forging die, which is then placed on the platform of the lifting platform 13.
[0017] As attached Figure 6 As shown, the lifting hydraulic cylinder 4' retracts, and the lifting platform 13 descends to its lower position on the shoulder. Simultaneously, the slider 401 at the end of the single rod of the wedge-pushing hydraulic cylinder 4 slides downward in the slider frame 12. Under the action of their own gravity, the two halves of the forging die 3 fall into the lower locking sleeve hole, causing the inner slope 101 of the lower locking sleeve hole to mesh with the outer lower slope 302 on the bottom surface of the two halves of the forging die 3.
[0018] As attached Figure 7 As shown, the upper punch seat 7 drives the upper locking sleeve 6 to move downwards, and the upper locking sleeve 6 tightens the upper end of the two halves of the forging die 3, so that the inner slope surface 601 of the upper locking sleeve engages with the outer upper slope surface 301 of the two halves of the forging die 3.
[0019] As attached Figure 7 and 8 As shown, the cylinder 10 pulls the latch 1001 outward, separating the latch 1001 from the hanger 801, and the upper punch seat 7 moves upward, separating the upper punch seat 7 from the upper locking sleeve 6.
[0020] As attached Figure 9 As shown, the upper punch seat 7 moves downward, and the pressure block 9 below it presses the upper locking sleeve 6 again, so that the inner slope 601 of the upper locking sleeve further engages with the outer slope 301 of the outer mold, and the upper locking sleeve 6 further locks the upper end of the forging die.
[0021] As attached Figure 10 As shown, the upper punch seat 7 drives the upper punch 11 to lift upward, and the forging billet 15 is placed into the mold cavity of the two halves of the forging die 3.
[0022] As attached Figure 11 As shown, the upper punch seat 7 drives the upper punch 11 to press the forging billet 15. As attached Figure 12 As shown, after the front and rear punches 14 press the forging blank 15, the forging of the forging 16 is completed.
[0023] In this invention, the demolding process is not shown in the figure. The cylinder 11 pushes the chuck 1001 to move laterally inward. The chuck 1001 engages with the hanger 801. The upper punch seat 7 drives the upper locking sleeve 6 to move upward through the hanger 8. The upper locking sleeve 6 separates from the upper end of the two halves of the forging die 3. The lifting platform 13 rises in the lower locking sleeve hole until the upper plane of the lifting platform 13 is level with the bottom of the dovetail groove. The two halves of the forging die 3 move upward with the lifting platform 13, and their lower ends leave the lower locking sleeve hole. The wedge-pushing hydraulic cylinder 4 pulls the left half and the right half of the two halves of the forging die 3 in opposite directions. The left half and the right half of the die separate, and the forging 16 is taken out.
[0024] This cycle repeats itself.
[0025] This invention is applicable to the forging of various multi-directional stamping forgings.
Claims
1. A multi-directional stamping self-locking splitting and joining forging die, comprising: The forging die comprises an outer mold, a core mold, a punch, a hydraulic cylinder, a die base, and a forging blank. The outer mold is configured as a left half and a right half, and the core mold is configured as a left half and a right half. Correspondingly, the left half of the outer mold covers the left half of the core mold to form a left forging die, and the right half of the outer mold covers the right half of the core mold to form a right forging die. The left and right forging dies together form a forging die. The forging blank is placed within the die cavity of the forging die. The punch includes an upper punch, a front punch, and a rear punch. The hydraulic cylinder drives the punch to press the forging blank. The forging die is characterized by: The back of the left and right half forging dies is divided into three areas from top to bottom. The upper area is a slope that slopes outward from top to bottom, the lower area is a slope that slopes outward from bottom to top, and the middle area is provided with a slider groove, which together with the slider at the end of the single rod of the wedge hydraulic cylinder forms an up-down moving pair. The bottom surfaces of the left and right halves of the forging die are respectively provided with dovetails; The die base is located below the forging die. The die base has a square lower locking sleeve hole. Dovetail grooves are provided on the upper surface of both sides of the hole in the left and right directions. The left dovetail groove engages with a dovetail on the bottom surface of the left half of the forging die to form a left-side sliding joint. The right dovetail groove engages with a dovetail on the bottom surface of the right half of the forging die to form a right-side sliding joint. The upper and lower sections of the lower locking sleeve hole are provided with a slope that is larger at the top and smaller at the bottom, which meshes with the slope of the lower area on the back of the forging die; A lifting platform and a shoulder are provided inside the lower locking sleeve hole; After the lifting platform rises, its upper surface is level with the bottom of the dovetail groove; after it descends, its lower surface rests on the shoulder. An upper punch and an upper punch seat are provided above the forging die, and an upper locking mechanism is provided on the upper punch seat; The upper locking mechanism includes: an upper locking sleeve, a hanging rod, a locking block, and a cylinder; The upper end of the boom is fixed to the upper punch seat, and the lower end is provided with a lifting clip. The upper locking sleeve is provided with a vertical through-hole for the lifting rod, through which the lifting rod passes; The upper locking sleeve has a slope that is smaller at the top and larger at the bottom on its left and right inner sides, respectively. The cylinder is disposed on the bottom surface of the upper locking sleeve, and the locking block is disposed at the end of the single rod of the cylinder. The cylinder drives the locking block to move horizontally through the single rod. The locking block moves horizontally inward and engages with the hanging clamp. The lower end of the hanging rod is connected at a right angle to the locking block. The hanging rod drives the upper locking sleeve to move vertically. Moving downward drives the upper locking sleeve to lock the upper end of the forging die. The upper slope of the back of the forging die engages with the slope of the inner side of the upper locking sleeve. Moving upward drives the upper locking sleeve to disengage from the upper end of the forging die. Mold opening process: a. When the locking mechanism is opened, the cylinder pushes the locking block to move horizontally inward, and the locking block engages with the hanging clamp. The upper punch seat drives the upper locking sleeve to move upward through the hanging rod. The upper locking sleeve separates from the upper end of the forging die. The lifting platform rises in the lower locking sleeve hole until the upper surface of the lifting platform is level with the bottom of the dovetail groove. The forging die moves upward with the lifting platform, and its lower end leaves the lower locking sleeve hole. The dovetail on the forging die is placed in the dovetail groove. b. Opening the mold: The wedge-pushing hydraulic cylinder pulls the left and right halves of the forging mold in opposite directions, and the left and right halves of the forging mold slide in opposite directions and separate in the dovetail groove. Mold closing process: a. Mold assembly: The wedge-push hydraulic cylinder pushes the left half of the forging die and the right half of the forging die towards each other along the dovetail groove onto the lifting platform, and assembles them into the forging die. b. Locking the forging die: The forging die descends with the lifting platform in the lower locking sleeve hole. The lower part of the lifting platform is placed on the shoulder. The lower locking sleeve hole locks the lower end of the forging die. The upper punch seat drives the upper locking sleeve to move downward through the lifting rod, locking the upper end of the forging die. The cylinder pulls the clamping block to move horizontally outward, and the clamping block separates from the lifting clamp.
2. The self-locking splitting and joining forging die for multi-directional stamping according to claim 1, characterized in that: The vertical angle between the slopes of the upper and lower regions on the back of the left and right half molds, and between the slopes of the upper locking sleeve and the inner side of the lower locking sleeve hole, is set to 2° to 6°.
3. The self-locking splitting and joining forging die for multi-directional stamping according to claim 1, characterized in that: A pressing block is provided under the upper punch seat between the upper punch seat and the upper locking sleeve. After the lifting rod separates from the locking block, the upper punch seat presses the upper locking sleeve downward through the pressing block.
4. The self-locking splitting and joining forging die for multi-directional stamping according to claim 1, characterized in that: The lifting rod hole is provided in multiple ways, and correspondingly, the lifting rod and the locking block are provided in multiple ways.