Workpiece unloading tongs for die forging

Abstract

The utility model discloses a workpiece unloading tongs for die forging, including first tongs arm and second tongs arm through the pin shaft hinged connection is connected, forms cross lever structure, the front end of first tongs arm and second tongs arm respectively is the tongs mouth for clamping workpiece, the rear end is respectively the handle for exerting force, and the clamping surface of two tongs mouth all is provided with self -adaptation clamping device, when the tongs mouth clamps on the irregular shape or has the draw -in slope forge piece, the device can automatically adjust its contact angle and position with workpiece, and the outer periphery of two handles is provided with heat -insulating structure, and one end of handle forward bending extension forms a crowbar part. The workpiece unloading tongs for die forging, solves the problem that the safety is poor, the efficiency is low, the universality is not strong, the cost is too high of the existing unloading tool generally exists.

Description

Technical Field

[0001] This utility model relates to the field of die forging technology, specifically to a workpiece unloading clamp for die forging. Background Technology

[0002] During the die forging process, after the workpiece is forged and formed in the die, the temperature is extremely high (up to several hundred degrees Celsius), and there is a significant adsorption or clamping force between the workpiece and the die cavity. Currently, operators typically unload the workpiece using the following methods: Hand tools (such as ordinary pliers and pry bars): pose risks of unstable gripping and slippage, and require operators to be extremely close to the high-temperature mold and workpiece, posing burn and safety risks. Ordinary pliers are also ineffective in handling the clamping force between the workpiece and the mold; Robotic arms: Although they have a high degree of automation, the equipment cost is high, making them less economical for small and medium-sized forging enterprises or non-fully automated production lines, and they are also complex to program and maintain. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a workpiece unloading clamp for die forging, which solves the problems of poor safety, low efficiency, poor versatility and high cost of existing unloading tools.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a workpiece unloading clamp for die forging, comprising a first clamp arm and a second clamp arm connected by a pin hinge to form a cross lever structure; the front ends of the first clamp arm and the second clamp arm are respectively clamping jaws for clamping workpieces, and the rear ends are respectively handles for applying force; an adaptive clamping device is provided on the clamping surfaces of the two clamping jaws; when the clamping jaws clamp onto an irregularly shaped forging or a forging with a draft angle, the device can automatically adjust its contact angle and position with the workpiece; a heat insulation structure is provided on the outer periphery of the two handles, and the end of one of the handles is bent forward to form a pry bar.

[0005] Furthermore, the adaptive clamping device includes multiple clamping heads, multiple clamping rods, and multiple mounting blocks. A laterally extending slot is provided on the clamping surface. The multiple mounting blocks are spaced apart in the slot, wherein: the two mounting blocks located on the outer side are fixedly installed, and the remaining mounting blocks can slide along the slot. A clamping head is provided between every two mounting blocks, and two opposing clamping rods are hinged to each clamping head, with the two ends of the two clamping rods respectively hinged to the two mounting blocks.

[0006] Furthermore, the pressing surface of the pressing head is an arc-shaped surface.

[0007] Furthermore, the outer surface of the clamping head is provided with a high-temperature resistant anti-slip pad.

[0008] Furthermore, the heat insulation structure includes a heat insulation sleeve wrapped around the handle, and a heat insulation baffle fixedly disposed on the handle near the jaw.

[0009] Furthermore, the heat insulation sleeve is a silicone sleeve, a high-temperature plastic sleeve, or a heat insulation cloth wrapping layer.

[0010] The beneficial effects of this utility model are: The above-mentioned workpiece unloading clamp for die forging has at least the following advantages: 1. Because adaptive clamping devices are installed on the clamping surfaces of both jaws, when the jaws clamp irregularly shaped forgings or forgings with draft angles, these devices can automatically adjust the contact angle and position with the workpiece. This transforms the clamping force from limited point or line contact to a larger, more closely fitted surface contact, greatly enhancing clamping stability and friction. It effectively overcomes the defects of ordinary pliers, such as "unstable clamping and easy slippage," preventing high-temperature workpieces from accidentally falling off during transport and improving operational safety and reliability.

[0011] 2. Because one of the handle ends bends forward to form a pry bar, this invention integrates both clamping and prying functions. When the workpiece is clamped inside the mold, the operator does not need to change tools and can directly use the pry bar to insert into the mold parting surface as a lever point. On the one hand, it solves the problem that ordinary pliers cannot effectively cope with the clamping force between the workpiece and the mold, providing a labor-saving and efficient mechanical prying solution; on the other hand, by integrating two functions into one, it simplifies the operation process, improves unloading efficiency, and avoids the trouble of finding and switching tools. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 A schematic diagram of a workpiece unloading clamp for die forging provided in an embodiment of this utility model; Figure 2 for Figure 1 A schematic diagram at point A in the middle; Figure 3 for Figure 1 The diagram shows the assembly of the sleeve, gear, and spiral spring in the workpiece unloading clamp for die forging. Figure label: 1. Workpiece; 100, First clamp arm; 200, Second clamp arm; 300, Adaptive clamping device; 310, Clamping head; 320, Clamping rod; 330, Mounting block; 400, Pry bar section; 500, Heat insulation baffle. Detailed Implementation

[0014] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0015] Please see Figures 1 to 3 This utility model provides a workpiece unloading clamp for die forging, including a first clamp arm 100 and a second clamp arm 200, which are hinged together in the middle by a pin to form a cross lever structure. The front end of the first clamp arm 100 forms a jaw, and the rear end forms a handle; similarly, the front end of the second clamp arm 200 forms another jaw, and the rear end forms another handle.

[0016] Both jaws are equipped with adaptive clamping devices 300 on their clamping surfaces. When the jaws clamp onto an irregularly shaped forging or a forging with a draft angle, this device automatically adjusts its contact angle and position with the workpiece 1. The operation involves applying clamping force, and the moving parts within the device adaptively deforming or displacing according to the contour of the workpiece 1 surface, thus expanding the clamping force from several discrete points or a line to a uniformly distributed contact surface. The beneficial effect is that it greatly increases the clamping contact area and friction, effectively preventing the jaws from slipping on the hot, smooth surface of the workpiece 1 or causing the workpiece 1 to fall off, significantly improving the reliability and safety of the operation.

[0017] In this embodiment, the end of one of the handles extends forward, towards the jaws, and bends to form a pry bar 400. In use, when the jaws have clamped the workpiece 1, but the workpiece 1 is stuck in the mold and difficult to remove due to cooling shrinkage or burrs, the operator can insert the end of the pry bar 400 into the parting line gap of the mold, using the mold edge as a fulcrum, and press the handle downwards. At this time, the entire unloading clamp acts as a single lever, transmitting the upward prying force to the workpiece 1 through the clamp arms, thus smoothly prying it out. Its advantage lies in the innovative integration of clamping and prying functions, allowing the operator to complete the continuous "clamping-prying" action without changing tools, saving time and effort, and is particularly suitable for situations with large clamping forces.

[0018] In this embodiment, a heat insulation structure is provided on the outer periphery of both handles. During operation, the heat insulation structure is always located between the operator's hand and the high-temperature workpiece 1 and the mold. This effectively reduces the heat conducted from the front end of the clamp arm to the handles and blocks the heat radiation from the high-temperature workpiece 1, preventing burns to the operator's hands, improving the working environment, and enhancing occupational safety.

[0019] Specifically, the adaptive clamping device 300 includes multiple clamping heads 310, multiple clamping rods 320, and multiple mounting blocks 330. A laterally extending slot is formed on the clamping surface of the jaws. Multiple mounting blocks 330 are arranged at intervals within this slot. The two outermost mounting blocks 330 are fixedly mounted in the slot, while the remaining mounting blocks 330 located between them can slide freely within the slot.

[0020] A clamping head 310 is provided between every two adjacent mounting blocks 330. On the back side of each clamping head 310, i.e., the side facing the jaw body, two opposing clamping rods 320 are connected by a hinge shaft. The other ends of these two clamping rods 320 are respectively hinged to the mounting blocks 330 on the left and right sides, thus forming a series of parallel hinged four-bar linkages consisting of "mounting block 330 - clamping rod 320 - clamping head 310".

[0021] When the jaws close and clamp workpiece 1, if the surface of workpiece 1 is uneven, one of the clamping heads 310 will first contact the surface of workpiece 1 and be subjected to pressure. This pressure will be transmitted to the mounting blocks 330 on both sides through the clamping rods 320. For the sliding mounting blocks 330, they will move along the slots under the action of this force, thereby driving the other clamping rods 320 connected to them to move, adjusting the position and orientation of the other clamping heads 310 until all clamping heads 310 are in full contact with the surface of workpiece 1. This structure achieves true "multi-point adaptive" clamping, which can perfectly fit various complex curved surfaces of workpiece 1, with excellent clamping stability and self-locking performance, and is ingenious and reliable.

[0022] In practical implementation, the clamping surface of the clamping head 310 that directly contacts the workpiece 1 can be designed as an arc-shaped surface. The geometric characteristics of the arc surface provide multi-directional contact possibilities. Compared with a flat surface, the arc-shaped surface can form better line contact or point contact with the irregular surface of the workpiece 1, making it easier to cut into and hold the workpiece 1, further enhancing the anti-slip capability.

[0023] Furthermore, a high-temperature resistant anti-slip pad can be wrapped or inlaid on the outer surface of the clamping head 310. This anti-slip pad is preferably made of copper-based powder metallurgy material or high-temperature resistant engineering ceramics. The high-temperature resistant anti-slip pad has the following functions: first, its high coefficient of friction greatly increases the clamping force; second, its relatively soft material will not damage the surface of the precision forging; third, its excellent high-temperature resistance ensures long-term stable operation in the high-temperature environment of die forging, without melting or failure.

[0024] In this embodiment, the heat insulation structure includes a heat insulation sleeve wrapped around the handle and a heat insulation baffle 500 fixedly disposed on the handle near the jaws. The heat insulation sleeve directly wraps around the outer surface of both handles, effectively preventing heat from being directly conducted from the metal of the handle to the operator's palm, providing direct tactile heat insulation. The heat insulation baffle 500 is fixedly installed on the handle near the jaws and is typically a plate-shaped object made of metal or heat-resistant composite material, extending perpendicular to the handle direction. The heat insulation baffle 500 effectively blocks infrared heat radiated directly from the high-temperature workpiece 1 and mold towards the operator's hand, solving the problem that simply wrapping the handle with a heat insulation sleeve cannot prevent heat radiation.

[0025] In practical implementation, the heat insulation sleeve can be a molded silicone sleeve. Silicone has good heat insulation and flexibility, and a comfortable feel. Alternatively, it can be an injection-molded high-temperature plastic sleeve, such as polyimide (PI) or polyetheretherketone (PEEK), which have excellent high-temperature resistance. Furthermore, as a low-cost and flexible solution, the heat insulation sleeve can also be a heat insulation cloth tape (such as asbestos cloth or fiberglass tape) directly wrapped around the handle. Its working principle utilizes the low thermal conductivity of these materials. The advantage is that it provides a variety of economical and practical implementation schemes to meet production needs with different cost budgets and performance requirements.

[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A workpiece unloading clamp for die forging, comprising a first clamp arm and a second clamp arm hinged together by a pin, forming a cross lever structure; the front ends of the first clamp arm and the second clamp arm are respectively clamping jaws for holding the workpiece, and the rear ends are respectively handles for applying force, characterized in that, Both jaws are equipped with adaptive clamping devices. When the jaws are clamped on an irregularly shaped forging or a forging with a draft angle, the device can automatically adjust its contact angle and position with the workpiece. The outer periphery of both handles is provided with a heat insulation structure, and the end of one of the handles is bent forward to form a pry bar.

2. The workpiece unloading clamp for die forging according to claim 1, characterized in that, The adaptive clamping device includes multiple clamping heads, multiple clamping rods, and multiple mounting blocks. A laterally extending slot is provided on the clamping surface. The multiple mounting blocks are spaced apart in the slot, wherein: the two mounting blocks located on the outer side are fixedly installed, and the remaining mounting blocks can slide along the slot. A clamping head is provided between every two mounting blocks, and two opposing clamping rods are hinged to each clamping head, with the two ends of the two clamping rods respectively hinged to the two mounting blocks.

3. The workpiece unloading clamp for die forging according to claim 2, characterized in that, The pressing surface of the pressing head is an arc-shaped surface.

4. The workpiece unloading clamp for die forging according to claim 2, characterized in that, The outer surface of the clamping head is provided with a high-temperature resistant anti-slip pad.

5. The workpiece unloading clamp for die forging according to claim 1, characterized in that, The heat insulation structure includes a heat insulation sleeve wrapped around the handle and a heat insulation baffle fixedly disposed on the handle near the jaw.

6. The workpiece unloading clamp for die forging according to claim 5, characterized in that, The heat insulation sleeve is a silicone sleeve, a high-temperature plastic sleeve, or a heat insulation cloth wrapping layer.

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