Forging die for preparing suspension clamp

Abstract

The invention discloses a forging die for suspension clamp preparation, and relates to the technical field of suspension clamp forging dies, the forging die comprises an upper die, a lower die and a guide pillar guide limiting structure arranged between the upper die and the lower die; the upper die comprises an upper die base and a male die fixed below the upper die base. The lower mold comprises a lower mold base, a female mold and an ejection mechanism, the female mold is fixed on the lower mold base, a mold cavity of the female mold is matched with the male mold core, and the ejection mechanism is an automatic demolding mechanism with an energy storage impact function and comprises a lifting assembly, an ejection rod, a positioning assembly, a transmission assembly and an unlocking assembly. The problem that in the prior art, when a suspension clamp is forged, constant ejection force cannot overcome increased demolding resistance caused by product cooling shrinkage, static friction and vacuum adsorption jointly is solved. The energy storage impact type ejection mechanism has the advantages that instant mechanical impact can be automatically applied to damage vacuum adsorption and static friction force when a product is stuck in a mold, demolding is facilitated, and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspension clamp forging die, and particularly relates to a forging die for preparing a suspension clamp. BACKGROUND

[0002] The suspension clamp is a key fitting in a power transmission line for fixing and suspending a conductor on a tower insulator string, and needs to bear the conductor weight, wind load and other comprehensive loads, and has high reliability requirements. In order to meet the dual requirements of light weight and high strength of the fitting for an extra-high voltage line, the existing process generally uses aluminum alloy to manufacture the suspension clamp by die forging.

[0003] Such a forging die generally includes an upper die, a lower die and a demolding part, wherein the ejection mechanism of the demolding part ejects the workpiece from the cavity after forging forming, so as to ensure the production rhythm and the quality of the forged piece.

[0004] In the prior art, the ejection process of the ejection mechanism of the die generally relies on a cylinder or an oil cylinder to drive the ejector rod to ascend uniformly, and the ejection force and speed are constant. However, the suspension clamp blank after forging cools and shrinks to produce deformation, which generates a large static friction force and a tight force with the surface of the cavity. In some cases, a state of nearly vacuum adsorption may be formed between the forged piece and the surface of the die cavity (especially in deep cavity parts with high surface finish and tight cooperation), which further increases the demolding resistance and causes demolding difficulty. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art, and provides a forging die for preparing a suspension clamp, so as to solve the technical problems in the prior art that the constant ejection force cannot overcome the increased variable demolding resistance caused by product cooling shrinkage, static friction and vacuum adsorption when the suspension clamp is forged. The present application has the advantages that the energy storage impact type ejection mechanism can automatically apply a transient mechanical impact to break the vacuum adsorption and static friction force when the product is stuck in the die, and assist in demolding.

[0006] The present application is implemented by the following technical scheme: the present application discloses a forging die for preparing a suspension clamp, which comprises an upper die, a lower die and a guide column guide limiting structure arranged between the upper and lower dies. The upper die comprises an upper die seat and a male die fixed below the upper die seat; the lower die comprises a lower die seat, a female die and an ejection mechanism, the female die is fixed on the lower die seat, the die cavity of the female die cooperates with the core of the male die, and the ejection mechanism is an automatic demolding mechanism with an energy storage impact function, which comprises a lifting assembly, an ejector rod, a positioning assembly, a transmission assembly and an unlocking assembly. The lifting assembly drives the lifting plate to move linearly through a push rod; the ejector rod comprises a fixed section and a movable section, the fixed section is fixed on the lifting plate, and the movable section is connected with the fixed section through a connecting rod and a supporting spring, and can axially stretch and contract relative to the fixed section. The positioning assembly is used to mechanically lock the active section in the compressed state when the active section moves downward under pressure; the transmission assembly converts the linear motion of the push rod into the lifting motion of the lifting plate; the unlocking assembly is linked with the transmission assembly and is used to release the locking state of the positioning assembly; The transmission assembly comprises a transmission column, a transmission bar, a guide groove and a let-in groove; the transmission column is fixed below the lifting plate, the transmission bar is fixedly connected with the telescopic shaft of the push rod, and the upper part of the transmission bar is provided with the guide groove and the let-in groove; the guide groove is a slope structure and is used to guide the stable lifting of the ejector rod; The let-in groove is located behind the guide groove and has a profile comprising a descending slope, a horizontal section and an ascending slope, and is used to provide a descending stroke of the lifting plate when the ejection is blocked, so that the active section is separated from the bottom surface of the product to form an impact spacing; through the cooperation of the guide groove and the let-in groove, the ejection mechanism can automatically cope with the two working conditions of normal ejection and die jamming impact within a single push rod stroke. The slope structure of the guide groove ensures the smooth and controllable ejection process, thereby ensuring the quality of the forged piece and the safety of the die; and the special profile of the let-in groove enables the mechanism to automatically store energy and generate instantaneous mechanical impact when blocked, effectively breaking the vacuum adsorption and static friction, and greatly improving the demolding success rate of deep cavity forged pieces.

[0007] Further, the positioning assembly comprises a sliding rod, a clamping block and a cross plate; the sliding rod is fixed at the bottom of the connecting rod and passes through the sliding groove on the lifting plate and the cross plate; the clamping block is elastically arranged on both sides of the sliding rod, and the bottom surface of the clamping block is a slope structure; when the active section moves downward under pressure to the preset position, the clamping block moves to below the cross plate, and the top surface of the clamping block contacts the bottom surface of the cross plate to form a rigid limit; through the rigid limit formed by the clamping block and the cross plate, the active section can be quickly locked at the preset compressed position when the ejection mechanism is blocked, effectively avoiding the bending or breaking of the ejector rod due to the continuous bearing of excessive pressure. The mechanical self-locking mechanism not only responds reliably, but also automatically triggers and resets through the slope guidance and elastic contraction, thereby improving the protection and stability of the demolding system.

[0008] Further, the unlocking assembly comprises an unlocking block and an unlocking groove; the unlocking block is fixed on both sides of the transmission bar, and the top part of the unlocking block is provided with the unlocking groove with an open slope; when the transmission bar moves to the let-in groove section and contacts the bottom part of the transmission column, the slope surface of the unlocking groove extrudes the clamping block, forcing it to contract, thereby releasing the locking of the active section; through the slope structure of the unlocking groove and the mechanical interference of the clamping block, the automatic unlocking of the pure mechanical type with high reliability is realized. The open slope design ensures that the clamping block can be forced and smoothly extruded back during the movement of the transmission bar, thereby releasing the limit and providing protection for the instantaneous impact release of the active section, thereby improving the continuity of the demolding action and the degree of system automation.

[0009] Further, the bottom wall height of the let-in groove is higher than the lowest point of the transmission bar, thereby ensuring that the top surface of the active section forms a predetermined spacing with the bottom surface of the product when the guide wheel is at the bottom wall of the let-in groove, and the spacing provides an acceleration stroke for the impact and ensures that the impact can accurately hit the product.

[0010] Further, the internal diameter of the fixed section of the ejector rod assembly is larger than the top end opening, and the connecting rod is provided with a stepped structure at the corresponding position to prevent disengagement from the fixed section.

[0011] Further, a return spring is arranged between the lifting plate and the backing plate, so that the lifting plate can automatically descend and reset after being lifted for ejection.

[0012] Further, the lower die further comprises a backing plate, backing feet and a bottom plate; the backing plate is arranged below the female die, the backing feet are arranged at the bottom of the backing plate and form a space for accommodating the ejecting mechanism between them, and the bottom plate is fixed to the bottom of the backing feet and connected to the lower die seat.

[0013] Further, the top end of the ejector rod is smoothly connected with the bottom wall of the female die cavity, so as to ensure the integrity of the cavity during die forging.

[0014] Further, a guide wheel is rotatably arranged at the bottom of the transmission column, and the guide wheel is in contact with the upper end surface of the transmission bar.

[0015] The present application has the following advantages: (1) The present application comprises an ejecting mechanism, which is provided with a telescopic ejector rod structure and an automatic unlocking assembly with energy storage and release mechanism, so that when the product is stuck due to the static friction force or vacuum adsorption generated by the shrinkage of the product and the cavity, the continuous ejecting force can be automatically converted into an instantaneous upward mechanical impact. The impact force can effectively break the vacuum seal state and static friction balance between the workpiece and the die cavity, so that the workpiece is loosened, thereby avoiding the bending of the ejector rod and the difficulty in demolding caused by the traditional linear ejecting.

[0016] (2) The present application cooperates the transmission bar, the guide groove and the accommodation groove, so that the push rod can automatically judge the demolding state in a single telescopic stroke; if the ejecting is smooth, the stable ejecting is completed; if resistance is encountered, the continuous actions of energy storage, locking, descending, unlocking and impact are automatically triggered, and multiple impact attempts can be performed in a cycle. Furthermore, not only the problems of low efficiency, high labor intensity and safety hazards caused by the traditional dependence on the experience of workers and manual knocking are overcome, but also the stability and repeatability of the production rhythm are ensured, which is suitable for the efficient and safe operation requirements of the automatic production line. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure of the male die and the female die of the present application; Figure 3 It is a schematic diagram of the structure of the backing plate and the backing feet of the present application; Figure 4 It is a schematic diagram of the structure of the present application Figure 3 A is a local enlarged structure schematic diagram of the present application; Figure 5This is a schematic diagram of the transmission bar and transmission column structure of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point B; Figure 7 This is a schematic diagram of the horizontal plate structure of the present invention; Figure 8 This is a schematic diagram of the transmission bar structure of the present invention.

[0018] In the diagram: 1. Upper mold; 2. Lower mold; 3. Pad plate; 4. Foot pad; 5. Base plate; 6. Return spring; 7. Positioning assembly; 8. Baffle plate; 9. Horizontal plate; 10. Slide groove; 11. Transmission assembly; 12. Clearance groove; 13. Unlocking assembly; 14. Connecting plate; 101. Upper mold base; 102. Punch; 201. Lower mold base; 202. Die; 203. Ejection mechanism; 231. Ejector rod; 232. Lifting assembly; 2311. Fixed section; 2312. Moving section; 2313. Connecting rod; 2314. Support spring; 2321. Lifting plate; 2322. Push rod; 701. Slide rod; 702. Locking block; 111. Transmission column; 112. Guide wheel; 113. Transmission bar; 114. Guide groove; 131. Unlocking block; 132. Unlocking groove. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. In the description of the present invention, words such as "front", "rear", "left", and "right" that indicate orientation or positional relationship 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0020] The embodiment discloses a forging die for preparing a suspension clamp, such as Figures 1-8 As shown, it includes an upper mold 1 and a lower mold 2, and the mold closing is guided and limited by guide pillars between the upper and lower molds.

[0021] like Figure 1 and Figure 2 As shown, the upper mold 1 consists of an upper mold base 101 and a punch 102. The punch 102 is fixed to the lower part of the upper mold base 101 by a screw, with its core facing downwards. The lower mold 2 includes a lower mold base 201, a die 202, and an ejection mechanism 203. The die 202 is also fixed to the lower mold base 201 by a screw, and its cavity cooperates with the core of the punch 102 to achieve forging. The ejection mechanism 203 is located directly below the punch 102 and is used to eject the workpiece from the die 202 after forming.

[0022] In addition, a backing plate 3 is arranged below the die 202, and the backing plate 3 can be made of chrome twelve steel and quenched to enhance its strength. Two backing feet 4 are arranged at the bottom of the backing plate 3, and a space for accommodating the ejection mechanism 203 is formed between the two backing feet 4. A bottom plate 5 is fixedly arranged at the bottom of the backing feet 4, and the bottom plate 5 is fixed to the lower die seat 201.

[0023] As shown in Figures 1-4 , the ejection mechanism 203 is composed of a top rod 231 and a lifting assembly 232, and the lifting assembly 232 is arranged in the reserved space between the two backing feet 4. The top rod 231 passes through the backing plate 3 and the die 202 from bottom to top, and the top end of the top rod 231 extends into the cavity and smoothly transitions with the bottom contour of the cavity, so as to ensure the integrity of the cavity and the stability of the forming during the die forging process. When the die is opened, the upper die is first raised, and then the lifting assembly 232 drives the top rod 231 to smoothly rise, and the workpiece is ejected from the die 202 cavity, so as to realize demolding.

[0024] In actual production process, the suspended line clamp blank after forging will shrink and deform during the cooling stage, resulting in significant static friction and tightness between the workpiece and the cavity surface. If the cavity surface has high smoothness and the deep cavity structure has tight cooperation, even a local vacuum adsorption state can be formed, which further increases the demolding resistance and causes demolding difficulty. In this case, if the top rod 231 continuously rises linearly under the driving of the cylinder but is blocked, the axial pressure it bears can exceed the yield limit, causing plastic deformation or even fracture of the top rod 231. In order to avoid the deformation problem caused by the continuous pressure of the top rod 231 after being blocked, corresponding protective measures need to be taken for the structural design of the ejection mechanism 203.

[0025] In the embodiment, as shown in Figure 5 , the top rod 231 adopts a telescopic structure, mainly composed of a fixed segment 2311, a movable segment 2312, a connecting rod 2313 and a supporting spring 2314. The fixed segment 2311 is connected to the lifting assembly 232, and the movable segment 2312 is coaxially arranged above the fixed segment 2311. The bottom end of the movable segment 2312 is fixedly connected with the connecting rod 2313, and the connecting rod 2313 is inserted into the fixed segment 2311 and can move axially, so that the movable segment 2312 can axially extend and retract relative to the fixed segment 2311.

[0026] The inner diameter of the fixed segment 2311 is larger than the top opening, and the connecting rod 2313 is provided with a stepped structure at the corresponding position to prevent the two from separating. The support spring 2314 is placed between the fixed segment 2311 and the movable segment 2312 to support the movable segment 2312; the model of the support spring 2314 is selected to maintain the movable segment 2312 at a predetermined height in the normal state. During the ejection process, the lifting assembly 232 drives the ejector rod 231 to rise, the movable segment 2312 contacts the workpiece and continuously applies force to achieve ejection. If the workpiece causes the demolding resistance to be too large due to tightness or vacuum adsorption, the movable segment 2312 will retract and compress the support spring 2314 after being pressed, thereby effectively buffering the overload force and avoiding rigid deformation of the ejector rod 231.

[0027] As shown in Figure 1 , Figures 4-5 , the lifting assembly 232 is composed of a lifting plate 2321 and a push rod 2322, wherein the lifting plate 2321 is located in the space between the two feet 4 and can move in the vertical direction, and the push rod 2322 serves as a power source to drive the lifting plate 2321 to move up and down. The fixed segment 2311 of the ejector rod 231 is fixedly installed on the lifting plate 2321, so that when ejection is needed, the push rod 2322 is started to push the lifting plate 2321 to move upwards, thereby driving the ejector rod 231 to rise and completing the ejection operation of the workpiece.

[0028] It should be noted that the push rod 2322 can be selected from a linear driving element such as an electric push rod 2322, an air cylinder or an oil cylinder. The ejector rod 231 is externally sleeved with a return spring 6, and the two ends of the spring are in contact with the lifting plate 2321 and the backing plate 3 respectively, so that the lifting plate 2321 can automatically descend and reset by the restoring force of the return spring 6 after completing the ejection rising action.

[0029] In this embodiment, in order to effectively solve the demolding difficulty and operation safety hidden danger caused by product jamming, the ejector mechanism 203 of the mold is set as an ejector mechanism 203 with energy storage impact function.

[0030] Specifically, as shown in Figure 1 , Figures 5-8As shown, the ejection mechanism is also provided with a supporting spring 2314 and a positioning assembly 7 in the ejector rod 231 system; when the product is stuck and cannot be normally ejected, the movable section 2312 of the ejector rod 231 is compressed downward under the action of resistance until reaching the lower limit position, at which time the positioning assembly 7 is automatically locked, so that the spring is in the energy storage state; then the positioning is released, and the compressed spring releases the stored energy instantaneously, drives the movable section 2312 to rebound upward at high speed, and applies a momentary mechanical impact to the stuck product. Through this impact force, the vacuum adsorption state or mechanical holding force between the product and the mold cavity can be effectively destroyed, so that the product is loosened, thereby assisting in completing the demolding. Through the automatic mechanical structure, the traditional operation mode relying on manual knocking is replaced, which improves the demolding efficiency and controllability, and reduces the operation risk and labor intensity.

[0031] As shown in Figure 4 , the present embodiment is fixedly provided with a baffle 8 before and after the space between the two pads 4, and a horizontal plate 9 is installed above the baffle 8, and the lifting plate 2321 is located above the horizontal plate 9. As shown in Figures 5-8 , the positioning assembly 7 is composed of a sliding rod 701, a clamping block 702 and a sliding groove 10; the sliding rod 701 is fixed to the bottom end of the connecting rod 2313 inside the fixed section 2311 and penetrates the fixed section 2311 and the lifting plate 2321 downward; the sliding groove 10 is provided at the corresponding position of the horizontal plate 9, the bottom end of the sliding rod 701 penetrates the sliding groove 10 and extends between the two baffles 8, and the outer wall thereof is in close contact with the sliding groove 10. The sliding rod 701 is provided with elastically retractable clamping blocks 702 on both sides, and the bottom surface of the clamping block 702 is designed as a slope in smooth transition with the side wall of the sliding rod 701.

[0032] Under normal circumstances, the supporting spring 2314 is in a free state, and the clamping block 702 is located above the horizontal plate 9; when the movable section 2312 is pressed to move downward and the spring is compressed to the preset position, the clamping block 702 moves to below the horizontal plate 9, the top surface thereof is in contact with the bottom surface of the horizontal plate 9 to form mechanical limiting, so that the entire movable section 2312 remains in the compressed state, and the supporting spring 2314 stores energy. In addition, the present embodiment is also provided with a transmission assembly 11, which converts the extension and retraction movement of the push rod 2322 into the lifting action of the lifting plate 2321, and synchronously controls the locking and release of the positioning assembly 7; when the push rod 2322 continues to extend, the clamping block 702 is driven to retract by the transmission assembly 11, and the limiting is released; the supporting spring 2314 is released instantaneously, the movable section 2312 is pushed upward at high speed, and directional vibration is applied to the product, so as to replace manual knocking in a mechanical automatic mode, and effectively promote demolding.

[0033] As shown in Figure 5 and Figure 8As shown, the transmission assembly 11 is composed of a transmission column 111, a guide wheel 112, a transmission bar 113 and a guide groove 114. The transmission column 111 is fixedly installed below the lifting plate 2321, and the bottom thereof is rotatably provided with the guide wheel 112; the transmission bar 113 is located below the transmission column 111 and is vertically arranged with the transmission column 111, and penetrates through the front and rear baffles 8, and one end of the transmission bar 113 is fixedly connected with the telescopic shaft of the push rod 2322. The upper end surface of the transmission bar 113 is provided with a ramp-shaped guide groove 114, which starts from the lowest point of the surface of the transmission bar 113, extends along the axial direction and gradually rises. The wheel surface of the guide wheel 112 always keeps in contact with the top surface of the transmission bar 113. When the push rod 2322 performs the telescopic movement, the transmission bar 113 is driven to move along the axial direction, and the guide wheel 112 gradually climbs from the lowest point of the transmission bar 113 to the highest point under the ramp guiding action, thereby driving the transmission column 111 to move upward, driving the lifting plate 2321 and the top rod 231 to rise, and completing the ejection action.

[0034] It should be noted that when the guide wheel 112 moves to the highest point of the transmission bar 113, i.e. the ejection stroke reaches the limit, if the product still cannot be demolded, the movable section 2312 will be compressed downward under the resistance of the workpiece and compress the supporting spring 2314; with the movable section 2312 moving downward, the clamping block 702 at the bottom thereof will be lowered below the horizontal plate 9, at this time, the top surface of the clamping block 702 is in contact with the bottom surface of the horizontal plate 9, forming a rigid limit, so that the movable section 2312 is stably kept at the compressed position.

[0035] In order to make the movable section 2312 have an upward impact stroke when it is released, in the embodiment, a recessed accommodation groove 12 is arranged on the upper end surface of the transmission bar 113, which extends along the axial direction from the highest point of the transmission bar 113, firstly gradually descends to form a descending slope, reaches a preset position and then extends horizontally, and then gradually rises to the highest point of the transmission bar 113 to form an ascending slope. The height of the bottom wall of the accommodation groove 12 is controlled to be higher than the lowest point of the transmission bar 113. When the guide wheel 112 moves to the bottom wall of the accommodation groove 12, the top surface of the movable section 2312 is lowered, and a preset interval is formed between the top surface of the movable section 2312 and the bottom surface of the product, which not only provides a necessary acceleration stroke for the subsequent release impact of the movable section 2312, but also ensures that the top surface of the movable section 2312 can accurately impact the bottom surface of the product after being released, so as to realize effective impact.

[0036] In addition, it should be noted that the displacement slot 12 is arranged behind the guide slot 114 in the advancing direction of the push rod 2322. During demolding, the shaft of the push rod 2322 is first extended to drive the shaft of the transmission bar 113 to move axially, and the slope of the guide slot 114 on the transmission bar 113 is in contact with the guide wheel 112, so that the ejector rod 231 slowly rises to implement ejection. If the product is jammed, the ejection resistance will cause the movable section 2312 to be pressed downward, compress the supporting spring 2314, and drive the bottom locking block 702 to move downward to below the horizontal plate 9, and contact the bottom surface of the horizontal plate 9 to form rigid limiting. Thereafter, the push rod 2322 continues to extend, the guide wheel 112 enters the displacement slot 12, the lifting plate 2321 is lowered under the action of the return spring 6, and the guide wheel 112 moves along the slope of the displacement slot 12 to the bottom wall thereof, at this time the top end of the movable section 2312 is lowered and forms a predetermined distance with the bottom surface of the product. Subsequently, the unlocking assembly 13 is actuated to retract the locking block 702 to release the locking, and the movable section 2312 is rapidly upwardly impacted to the product under the rebounding force of the supporting spring 2314, so that the product is vibrated and loosened. Finally, the guide wheel 112 moves along the rising slope on the other side of the displacement slot 12, drives the ejector rod 231 to rise again, and completely ejects the loosened product.

[0037] The present embodiment realizes the automatic response of the push rod 2322 to different demolding conditions in a single extension and retraction stroke by the integrated transmission bar 113, guide slot 114 and displacement slot 12. During the extension of the push rod 2322, the guide slot 114 first guides the ejector rod 231 to stably rise to complete the normal ejection; if the product is jammed, the ejection resistance will trigger the movable section 2312 to be pressed downward, so that the locking block 702 moves to below the horizontal plate 9 to form limiting. Subsequently, the guide wheel 112 enters the displacement slot 12 region, drives the lifting plate 2321 to descend, so that the top end of the movable section 2312 is separated from the bottom surface of the product to form an impact stroke, and then the locking block 702 is unlocked, and the supporting spring 2314 rapidly releases energy to drive the movable section 2312 to upwardly impact the product to break the adhesion between the product and the mold cavity. If the product is still not demolded after the first impact, the mechanism can automatically execute the above-mentioned limiting, descending, unlocking and impact processes, i.e., the mechanism realizes the continuous twice impact and ejection attempts on the product in the same extension and retraction cycle of the push rod 2322. When the product can be normally demolded, the movable section 2312 is only slightly pressed and does not trigger the impact action, so that unnecessary frequent impact on the product is avoided, and the demolding efficiency and product protection are considered.

[0038] As Figure 8As shown, the unlocking assembly 13 of the embodiment is composed of unlocking blocks 131 and unlocking grooves 132. Two unlocking blocks 131 are respectively fixed to the two sides of the transmission bar 113 through connecting plates 14, and the top of each unlocking block 131 is provided with a front-to-rear through unlocking groove 132, the width of the groove matches the width of the slide rod 701, allowing the slide rod 701 to pass through and adhere to the inner wall of the groove. The front and rear ends of the unlocking groove 132 are designed as open slopes. When the transmission bar moves axially to the position where the guide wheel is in the accommodation groove 12, the unlocking block 131 moves to the position below the slide rod 701, and the slide rod 701 falls into the unlocking groove 132; as the transmission bar 113 continues to move, the slope surface at one end of the unlocking groove 132 contacts and exerts pressure on the clamping block 702, forcing the clamping block 702 to contract inward, thereby releasing the mechanical limiting of the movable section 2312. The movable section 2312 immediately moves upward under the restoring force of the supporting spring 2314, completing the impact action on the product.

[0039] The principle of the present application is as follows: in the conventional demolding, the push rod 2322 is extended, driving the transmission bar 113 to move axially, the guide groove 114 on the transmission bar 113 pushes the transmission column 111 and the lifting plate 2321 to rise, and then drives the ejector rod 231 to smoothly eject the workpiece. If the workpiece is stuck due to vacuum adsorption or huge tightness between the workpiece and the mold cavity, the ejection will be blocked, triggering the energy storage impact mechanism; the movable section 2312 of the ejector rod 231 is pressed downward under the resistance, compressing the supporting spring 2314 until the bottom clamping block 702 moves to the position below the horizontal plate 9 and is locked, at this time the spring is in the energy storage state; at the same time, the push rod 2322 continues to move to make the guide wheel 112 enter the accommodation groove 12 on the transmission bar 113, driving the lifting plate 2321 to descend, so that the top end of the movable section 2312 is separated from the bottom surface of the workpiece to form a predetermined impact distance. Then the unlocking assembly 13 acts; the unlocking blocks 131 fixed to the two sides of the transmission bar 113 move to the position below the slide rod 701, and the unlocking grooves 132 (the groove opening is designed as a slope) on the top of the unlocking blocks 131 extrude the clamping block 702 during the movement process, forcing it to contract and thereby releasing the mechanical limiting of the movable section 2312. The compressed supporting spring 2314 instantaneously releases energy, driving the movable section 2312 to impact the workpiece at high speed, breaking the vacuum sealing state and static friction force between the workpiece and the mold cavity, and loosening the workpiece. Finally, the guide wheel 112 moves along the upward slope of the accommodation groove 12, driving the ejector rod 231 to rise again, and completely ejecting the loosened workpiece. If the workpiece is still not demolded after the first impact, the mechanism can automatically execute the above-mentioned "compression-locking-descending-unlocking-impact" process in the same extension stroke of the push rod 2322, realizing multiple impact and ejection attempts on the workpiece.

[0040] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. A forging die for preparing a suspension clamp, comprising an upper die (1), a lower die (2), and a guide post guiding and limiting structure arranged between the upper and lower dies (2); The upper die (1) comprises an upper die base (101) and a male die (102) fixed below the upper die base (101); the lower die (2) comprises a lower die base (201), a female die (202) and an ejection mechanism (203), the female die (202) is fixed on the lower die base (201), the die cavity of the female die (202) cooperates with the core of the male die (102), and the upper die (1) and the lower die (2) are characterized in that: The ejection mechanism (203) is an automatic demolding mechanism with energy storage impact function, which comprises a lifting assembly (232), a ejector rod (231), a positioning assembly (7), a transmission assembly (11) and an unlocking assembly (13); The lifting assembly (232) drives the lifting plate (2321) to move linearly through the push rod (2322); the ejector rod (231) comprises a fixed section (2311) and a movable section (2312), the fixed section (2311) is fixed on the lifting plate (2321), and the movable section (2312) is connected with the fixed section (2311) through the connecting rod (2313) and the supporting spring (2314) and can axially stretch and contract relative to the fixed section (2311); The positioning assembly (7) is used for mechanically locking the movable section (2312) in the compressed state when the movable section (2312) moves downward under pressure; the transmission assembly (11) converts the linear motion of the push rod (2322) into the lifting motion of the lifting plate (2321); the unlocking assembly (13) is linked with the transmission assembly (11) and is used for releasing the locking state of the positioning assembly (7); The transmission assembly (11) comprises a transmission column (111), a transmission bar (113), a guide groove (114) and a giving-up groove (12); the transmission column (111) is fixed below the lifting plate (2321), the transmission bar (113) is fixedly connected with the telescopic shaft of the push rod (2322), and the upper portion of the transmission bar (113) is provided with the guide groove (114) and the giving-up groove (12); the guide groove (114) is a slope structure and is used for guiding the ejector rod (231) to stably rise; The giving-up groove (12) is located behind the guide groove (114) and comprises a descending slope, a horizontal section and an ascending slope, and is used for providing the descending stroke of the lifting plate (2321) when the ejection is blocked, so that the movable section (2312) is separated from the bottom surface of the product to form an impact spacing.

2. A forging die for making a pendant, as claimed in claim 1, wherein, The positioning assembly (7) comprises a slide rod (701), a clamping block (702) and a cross plate (9); the slide rod (701) is fixed at the bottom of the connecting rod (2313) and passes through the sliding groove (10) on the lifting plate (2321) and the cross plate (9); the clamping block (702) is elastically arranged on both sides of the slide rod (701) and has a slope structure on the bottom surface; when the movable section (2312) moves downward to the preset position under pressure, the clamping block (702) moves to below the cross plate (9), the top surface of the clamping block (702) contacts the bottom surface of the cross plate (9) to form rigid limiting.

3. A forging die for making a pendant, as claimed in claim 2, wherein, The unlocking assembly (13) comprises an unlocking block (131) and an unlocking groove (132); the unlocking block (131) is fixed on both sides of the transmission bar (113), and the unlocking groove (132) with an open slope is formed at the top of the unlocking block (131); when the transmission bar (113) moves to the section of the giving-up groove (12) and contacts the bottom of the transmission column (111), the slope surface of the unlocking groove (132) extrudes the clamping block (702), so that the clamping block (702) is forced to contract, thereby releasing the locking of the movable section (2312).

4. A forging die for making a pendant clip as defined in claim 1, wherein, The bottom wall height of the let slot (12) is higher than the lowest point of the transmission bar (113), which ensures that the top surface of the movable section (2312) and the product bottom surface form a predetermined interval when the guide wheel (112) is at the bottom wall of the let slot (12), the interval provides an acceleration stroke for the impact, and the impact can accurately hit the product.

5. A forging die for making an overhanging hanger as defined in claim 1, wherein The inner diameter of the fixed section (2311) of the ejector rod (231) assembly is larger than the top opening, and the connecting rod (2313) is provided with a step structure at the corresponding position to prevent disengagement from the fixed section (2311).

6. A forging die for making an overhead strain clamp as defined in claim 1 wherein, The lifting plate (2321) and the pad plate (3) are provided with a reset spring (6), so that the lifting plate (2321) can automatically descend and reset after being ejected and rising.

7. A forging die for making an overhead strain clamp as defined in claim 1 wherein, The lower mold (2) further comprises a pad plate (3), a pad foot (4) and a bottom plate (5); the pad plate (3) is arranged below the concave mold (202), the pad foot (4) is located at the bottom of the pad plate (3) on both sides, and a space for accommodating the ejecting mechanism (203) is formed therebetween, and the bottom plate (5) is fixed to the bottom of the pad foot (4) and connected to the lower mold base (201).

8. A forging die for making a pendant, as defined in claim 1, wherein, The top end of the ejector rod (231) is smoothly connected with the bottom wall of the cavity of the concave mold (202), which ensures the integrity of the cavity during mold forging.

9. A forging die for making an overhead strain clamp as defined in claim 1 wherein, The bottom of the transmission column (111) is rotatably provided with a guide wheel (112), and the guide wheel (112) is in contact with the upper end surface of the transmission bar (113).

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