A forging die for preparing an overhang clamp

Abstract

The application discloses a forging die for preparing a suspension wire clamp and relates to the technical field of suspension wire clamp forging dies.The forging die comprises an upper die, a lower die and a guide column 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 die comprises a lower die base, a female die and an ejection mechanism.The female die is fixed on the lower die base, and the die cavity of the female die and the core of the male die are matched with each other.The ejection mechanism is an automatic demolding mechanism with an energy storage impact function, and comprises a lifting assembly, a top rod, a positioning assembly, a transmission assembly and an unlocking assembly.The application improves the problems that the constant ejection force cannot overcome the increased demolding resistance caused by product cooling shrinkage, static friction and vacuum adsorption during the forging of the suspension wire clamp in the prior art.The 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 the static friction force when the product is clamped in the mold, and the demolding is facilitated.

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 comprehensive load of the conductor self weight, wind load and the like, 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 comprises an upper die, a lower die and a demolding part, wherein the ejection mechanism of the demolding part guarantees the production rhythm and the forging quality by ejecting the workpiece from the cavity after forging.

[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 at a constant speed, and the ejection force and the speed are constant. However, the suspension clamp blank after forging is cooled and shrinks to produce deformation, which generates a large static friction force and a tight wrapping force with the surface of the cavity. In some cases, a state of nearly vacuum adsorption may be formed between the forging 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 at overcoming the deficiencies 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 and the like 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 the static friction force when the product is stuck in the die, and assist in demolding.

[0006] The present application is achieved by the following technical scheme: the present application discloses a forging die for preparing a suspension clamp, comprising an upper die, a lower die and a guide column guide limiting structure arranged between the upper and lower dies;

[0007] 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;

[0008] The lifting assembly drives the lifting plate to move linearly through the push rod; the ejector rod comprises a fixed section and a movable section, the fixed section is fixed to the lifting plate, and the movable section is connected to the fixed section through a connecting rod and a supporting spring and can axially extend and retract relative to the fixed section;

[0009] The positioning assembly is used to mechanically lock the movable section in the compressed state when it 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;

[0010] The transmission assembly comprises a transmission column, a transmission bar, a guide groove and a giving-way groove; the transmission column is fixed below the lifting plate, the transmission bar is fixedly connected with the extension shaft of the push rod, and the upper part of the transmission bar is provided with the guide groove and the giving-way groove; the guide groove is a slope structure and is used to guide the smooth rising of the ejector rod;

[0011] The giving-way 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 lifting plate descending stroke when the ejection is blocked, so that the movable section is separated from the bottom surface of the product to form an impact spacing; through the cooperation of the guide groove and the giving-way 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 that the ejection process is smooth and controllable, thereby ensuring the quality of the forgings and the safety of the die; and the special profile of the giving-way groove enables the mechanism to automatically store energy and produce instantaneous mechanical impact when blocked, effectively breaking the vacuum adsorption and static friction force, and greatly improving the demolding success rate of deep cavity forgings.

[0012] Further, the positioning assembly comprises a sliding rod, a clamping block and a cross plate; the sliding rod is fixed to 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 movable section moves downward to the preset position under pressure, 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 movable section can be quickly locked at the preset compressed position when the ejection mechanism is blocked, effectively preventing the ejector rod from being bent or broken due to continuously bearing excessive pressure. Through the mechanical self-locking mechanism, not only the response is reliable, but also the automatic triggering and resetting are realized through the slope guidance and elastic contraction, thereby improving the protection and stability of the demolding system.

[0013] Further, the unlocking assembly comprises an unlocking block and an unlocking slot; the unlocking block is fixed on both sides of the transmission bar, and the top of the unlocking block is provided with the unlocking slot with an open slope; when the transmission bar moves to the position where the gap slot section is in contact with the bottom of the transmission column, the slope of the unlocking slot is pressed against the clamping block, so that the clamping block is forced to retract, thereby releasing the locking of the movable section; through the mechanical interference between the slope structure of the unlocking slot and the clamping block, the automatic unlocking of the pure mechanical type and high reliability is realized. The open slope design ensures that the clamping block can be forced and stably extruded and retracted during the movement of the transmission bar, the limiting is released, the instantaneous impact release of the movable section is ensured, and the continuity and system automation degree of the demolding action are improved.

[0014] Further, the bottom wall of the gap slot is higher than the lowest point of the transmission bar, so that when the guide wheel is on the bottom wall of the gap slot, the top surface of the movable section and the bottom surface of the product form a predetermined interval, the interval provides an acceleration stroke for the impact, and the impact can accurately hit the product.

[0015] Further, the inner diameter of the fixed section of the ejector rod assembly is larger than the top opening, and the connecting rod is provided with a step structure at the corresponding position, so that the fixed section is prevented from being separated from the connecting rod.

[0016] 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 by the ejecting mechanism.

[0017] Further, the lower die further comprises a backing plate, a backing foot and a bottom plate; the backing plate is arranged below the female die, the backing foot is arranged at the bottom of the backing plate and forms a space for accommodating the ejecting mechanism between the two sides of the backing foot, and the bottom plate is fixed at the bottom of the backing foot and connected to the lower die seat.

[0018] Further, the top end of the ejector rod is smoothly connected with the bottom wall of the female die cavity, so that the cavity is complete when the die is closed and forged.

[0019] Further, the bottom of the transmission column is rotatably provided with a guide wheel, and the guide wheel is in contact with the upper end surface of the transmission bar.

[0020] The present application has the following advantages:

[0021] (1) The present application comprises an ejecting mechanism, a telescopic ejector rod structure with energy storage and release mechanism and an automatic unlocking assembly, so that when the product is stuck due to the static friction force generated by the cooling shrinkage of the product and the cavity or vacuum adsorption, the continuous ejecting force can be automatically converted into instantaneous upward mechanical impact. Through the impact force, the vacuum sealing state and the static friction balance between the workpiece and the die cavity interface can be effectively destroyed, 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.

[0022] (2) This invention, through the coordinated operation of the transmission bar, guide groove, and clearance groove, enables the push rod to automatically determine the demolding state within a single extension stroke; if the ejection is smooth, a stable ejection is completed; if resistance is encountered, a series of actions of accumulating power, locking, lowering, unlocking, and impact are automatically triggered, and multiple impact attempts can be repeated. This not only overcomes the problems of low efficiency, high labor intensity, and safety hazards caused by traditional reliance on operator experience and manual hammering, but also ensures the stability and repeatability of the production cycle, making it suitable for the high-efficiency and safe operation requirements of automated production lines. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the punch and die structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the pad and foot structure of the present invention;

[0026] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point A;

[0027] Figure 5 This is a schematic diagram of the transmission bar and transmission column structure of the present invention;

[0028] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point B;

[0029] Figure 7 This is a schematic diagram of the horizontal plate structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the transmission bar structure of the present invention.

[0031] 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

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In addition, a backing plate 3 is provided below the die cavity 202. To enhance its strength, the backing plate 3 can be made of chromium 12 steel and is hardened. Pad feet 4 are installed on both sides of the bottom of the backing plate 3, forming a space between the two pad feet 4 to accommodate the movement of the ejection mechanism 203. A base plate 5 is fixedly mounted on the bottom of the pad feet 4, and the base plate 5 is fixed to the lower die base 201.

[0036] like Figures 1-4 As shown, the ejection mechanism 203 consists of an ejector rod 231 and a lifting assembly 232, with the lifting assembly 232 installed in the reserved space between the two feet 4. The ejector rod 231 passes through the pad 3 and the die 202 from bottom to top, with its top end extending into the cavity and maintaining a smooth transition with the bottom contour of the cavity, thus ensuring the integrity of the cavity and stable forming during the die-forming process. When the die is opened, the upper die rises first, and then the lifting assembly 232 drives the ejector rod 231 to move upward smoothly, ejecting the forged work from the cavity of the die 202, thus achieving demolding.

[0037] In actual production, the suspended line clamp blank after forging and pressing 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 is closely matched, even a local vacuum adsorption state may be formed, further increasing the demolding resistance and causing demolding difficulty. In this case, if the ejector rod 231 continues to rise linearly under the driving of the air cylinder but is blocked, the axial pressure it bears may exceed the yield limit, causing plastic deformation or even breakage of the ejector rod 231. To avoid deformation caused by continued pressure of the ejector rod 231 after being blocked, appropriate protective measures need to be taken for the structural design of the ejection mechanism 203.

[0038] In this embodiment, as shown in Figure 5 , the ejector 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 installed above the fixed segment 2311, with the connecting rod 2313 fixedly connected to the bottom end thereof. The connecting rod 2313 is inserted into the inside of 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.

[0039] The inside diameter of the fixed segment 2311 is larger than the top opening, and the connecting rod 2313 has a stepped structure at the corresponding position to prevent the two from separating. The supporting spring 2314 is placed between the fixed segment 2311 and the movable segment 2312 to support the movable segment 2312. The model of the supporting 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 demolding resistance is too large due to the tightness or vacuum adsorption of the workpiece, the movable segment 2312 will retract and compress the supporting spring 2314 after being pressed, effectively buffering the overload force and preventing rigid deformation of the ejector rod 231.

[0040] As shown in Figure 1 , Figures 4-5 , the lifting assembly 232 is composed of a lifting plate 2321 and a push rod 2322. The lifting plate 2321 is located in the space between the two feet 4 and can move vertically, and the push rod 2322 drives the lifting plate 2321 to move up and down as a power source. 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.

[0041] It should be noted that the push rod 2322 can be selected from an electric push rod 2322, a pneumatic cylinder or an oil cylinder, etc. The outer part of the ejector rod 231 is sleeved with a reset spring 6, and the two ends of the reset spring 6 are in contact with the lifting plate 2321 and the base plate 3 respectively, so that the lifting plate 2321 can be automatically lowered and reset by the restoring force of the reset spring 6 after completing the ejection and rising action.

[0042] In this embodiment, in order to effectively solve the demolding difficulty and operation safety hazard caused by product clamping, the ejection mechanism 203 of the mold is set as an ejection mechanism 203 with energy storage and impact function.

[0043] Specifically, as shown in Figure 1 , Figures 5-8 The ejection mechanism further comprises 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 automatically locks it, 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 depending on manual knocking is replaced, which improves the demolding efficiency and controllability, and reduces the operation risk and labor intensity.

[0044] As shown in Figure 4 , the present embodiment is fixedly arranged with baffles 8 before and after the space between the two base plates 4, and a horizontal plate 9 is installed above the baffles 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 in the corresponding position of the horizontal plate 9, the bottom end of the sliding rod 701 penetrates the sliding groove 10 and extends into the space between the two baffles 8, and the outer wall of the sliding rod 701 is in contact with the sliding groove 10. The clamping block 702 is elastically retractable and arranged on both sides of the sliding rod 701, and the bottom surface of the clamping block 702 is designed as a slope which is smoothly connected with the side wall of the sliding rod 701.

[0045] In normal state, the supporting spring 2314 is in free state, and the clamping block 702 is 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 of the clamping block 702 contacts with the bottom surface of the horizontal plate 9 to form mechanical limiting, so that the whole movable section 2312 is kept in compressed state, and the supporting spring 2314 stores energy. In addition, the embodiment is also provided with the 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 unlocking 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 to impact upward at high speed, directional vibration is applied to the product, manual knocking is replaced by mechanical automatic mode, and demolding is effectively promoted.

[0046] As shown in Figure 5 and Figure 8 , 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 part 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 extension shaft of the push rod 2322. The upper end surface of the transmission bar 113 is provided with a slope-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 contacts with the top surface of the transmission bar 113. When the push rod 2322 performs extension and retraction movement, the transmission bar 113 is driven to move along the axial direction, the guide wheel 112 gradually climbs from the lowest point to the highest point of the transmission bar 113 under the slope guide action, thereby driving the transmission column 111 to move upward, driving the lifting plate 2321 and the ejector rod 231 to rise, and completing the ejection action.

[0047] 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 compress the supporting spring 2314 downward under the resistance of the workpiece; with the movable section 2312 moving downward, the clamping block 702 at the bottom of the movable section 2312 moves to below the horizontal plate 9, at this time, the top surface of the clamping block 702 contacts with the bottom surface of the horizontal plate 9 to form rigid limiting, so that the movable section 2312 is stably kept at the compressed position.

[0048] In order to release the active section 2312 with an upward impact stroke, in this embodiment, a concave accommodation groove 12 is arranged on the upper end surface of the transmission bar 113. The groove extends axially from the highest point of the transmission bar 113, gradually declines to form a downward slope, extends horizontally at a preset position, and then gradually rises to the highest point of the transmission bar 113 to form an upward 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 active section 2312 is lowered to form a preset gap with the bottom surface of the product. This gap not only provides the necessary acceleration stroke for the subsequent release impact of the active section 2312, but also ensures that the top surface of the active section 2312 can accurately impact the bottom surface of the product after release, achieving effective impact.

[0049] In addition, it should be noted that the accommodation groove 12 is arranged behind the guide groove 114 in the forward direction of the push rod 2322. During demolding, the shaft of the push rod 2322 is first extended to drive the transmission bar 113 to move axially, and the slope of the guide groove 114 on the transmission bar 113 comes into contact with the guide wheel 112 to slowly lift the ejector rod 231 to implement ejection. If the product is stuck, the ejection resistance will cause the active section 2312 to be pressed down, compressing the supporting spring 2314 and driving the bottom locking block 702 to move down to below the horizontal plate 9 and come into contact with 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 accommodation groove 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 accommodation groove 12 to the bottom wall thereof. At this time, the top end of the active section 2312 is lowered and forms a predetermined gap 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 active section 2312 is driven by the rebounding force of the supporting spring 2314 to impact the product at high speed, causing the product to vibrate and loosen. Finally, the guide wheel 112 moves along the upward slope on the other side of the accommodation groove 12 to drive the ejector rod 231 to rise again and completely eject the loosened product.

[0050] The embodiment realizes the composite action of the push rod 2322 automatically responding to different demolding conditions in a single extension and retraction stroke by the integrated cooperation of the transmission bar 113, the guide groove 114 and the accommodation groove 12. During the extension of the push rod 2322, the guide groove 114 first guides the steady lifting of the ejector rod 231 to complete the normal ejection; if the product is stuck, the ejection is blocked to trigger the downward pressing of the movable section 2312, so that the clamping block 702 moves to the lower side of the horizontal plate 9 to form a limit. Then the guide wheel 112 enters the accommodation groove 12 area, drives the lifting plate 2321 to descend, separates the top end of the movable section 2312 from the bottom surface of the product to form an impact stroke, and then the clamping block 702 is unlocked, and the supporting spring 2314 rapidly releases energy to drive the movable section 2312 to impact the product upward, thereby breaking the adhesion between the product and the mold cavity. If the product is still not demolded after the first impact, the mechanism can automatically cycle the above-mentioned limit, descent, unlock and impact process, that is, the mechanism realizes the continuous two-time impact and ejection attempts of 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, thereby avoiding unnecessary frequent impact on the product, and balancing the demolding efficiency and product protection.

[0051] As shown in Figure 8 The unlocking assembly 13 of the embodiment is composed of unlocking blocks 131 and unlocking grooves 132. Two unlocking blocks 131 are fixed on both sides of the transmission bar 113 through connecting plates 14, and the top of each unlocking block 131 is provided with a front-to-back through unlocking groove 132. The width of the unlocking groove 132 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 lower side of the slide rod 701, and the slide rod 701 falls into the unlocking groove 132. With the continuous movement of the transmission bar 113, the slope surface at one end of the unlocking groove 132 contacts and extrudes the clamping block 702, forcing the clamping block 702 to shrink inward, thereby releasing the mechanical limit of the clamping block 702 on the movable section 2312. The movable section 2312 immediately moves upward under the restoring force of the supporting spring 2314 to complete the impact action on the product.

[0052] The principle of the present application is as follows: in the conventional demolding, the push rod 2322 extends, 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 upward through the guide wheel 112, 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 caused by cooling shrinkage, the ejection will be blocked, triggering the energy storage impact mechanism; the movable section 2312 of the ejector rod 231 is pressed down under the action of resistance, compressing the supporting spring 2314 until the bottom stopper 702 moves to below the horizontal plate 9 and is locked, at which 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 displacement slot 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 preset impact distance. Then the unlocking assembly 13 acts; the unlocking block 131 fixed on both sides of the transmission bar 113 moves to below the slide rod 701, and the unlocking slot 132 (the slot is designed as a slope) at the top of the unlocking block 131 is squeezed during the movement process, forcing the stopper 702 to shrink and thus releasing the mechanical limit of the movable section 2312. The compressed supporting spring 2314 releases energy instantaneously, 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 making the workpiece loose. Finally, the guide wheel 112 moves along the rising slope of the displacement slot 12, driving the ejector rod 231 to rise again and completely eject 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.

[0053] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A forging die for preparing a suspension clamp, comprising an upper die (1), a lower die (2), and a guide post guide limiting structure arranged between the upper and lower dies; 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 give-way 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 give-way groove (12); the guide groove (114) is a slope structure and is used for guiding the ejector rod (231) to stably rise; The give-way 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 to 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 the bottom surface thereof is a slope structure; 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 in the top portion of the unlocking block (131); when the transmission bar (113) moves to the section of the give-way groove (12) and contacts the bottom portion 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 go slot (12) is higher than the lowest point of the transmission bar (113), which ensures that the top surface of the movable section (2312) forms an impact spacing with the product bottom surface when the guide wheel (112) is at the bottom wall of the let go slot (12), the spacing 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 lower mold (2) further comprises a cushion plate (3), a cushion foot (4) and a bottom plate (5); the cushion plate (3) is arranged below the female die (202), the cushion foot (4) is located at the bottom of the cushion 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 cushion foot (4) and connected to the lower mold seat (201).

7. A forging die for making a pendant clamp as defined in claim 6 wherein, A return spring (6) is arranged between the lifting plate (2321) and the cushion plate (3), so that the lifting plate (2321) can automatically descend and reset after rising.

8. A forging die for making a pendant, as defined in claim 1, wherein, The top end of the ejector rod (231) smoothly transitions with the bottom wall of the cavity of the female die (202), ensuring 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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