Portable carrying and assembling device for large-diameter forming die

Abstract

The present application belongs to the technical field of material handling machinery, and particularly relates to a portable carrying and assembling device for large-diameter forming dies. The device comprises a light hand-operated stacker, a rotating auxiliary device and a clamping mechanism. The present application is based on the semi-mechanical improvement and lightweight design of a mature commercial platform. By selecting a mature light hand-operated stacker on the market as the main body and assisting with a simple rotating and clamping mechanism, the complexity and cost of the equipment are reduced, the flexibility is improved, and the market gap between "too expensive for full-automatic equipment" and "too tiring for pure manual work" in the application scene of light-load high-frequency die replacement is filled.

Description

Technical Field

[0001] This invention belongs to the field of material handling machinery technology, specifically relating to a lightweight handling and assembly device for large-diameter forming molds. Background Technology

[0002] Hydraulic forming molds are typically heavy and irregularly shaped. Currently, the industry still widely uses traditional manual handling methods for mold changing. This method has three fundamental problems: first, it is labor-intensive, relying on manual lifting of heavy objects, which easily leads to operator fatigue; second, due to mismatched equipment station heights, mold installation is difficult, often requiring multiple people to forcibly lift and align it; third, the complex shape of the mold makes manual alignment difficult and inaccurate, and forcibly pushing it in is not only inefficient but also prone to collisions, deviations, and even mold damage or personnel injury. To address these fundamental problems of traditional manual mold changing, electrified solutions have emerged in the existing technology. Chinese patent CN222714405U proposes an automated mold transfer device, and Chinese patent CN224197386U discloses a hydraulic press rapid mold changing device. The core idea of ​​CN222714405U and CN224197386U is to construct an automated device integrating lifting and moving functions. These components consist of a lifting assembly (base, hydraulic cylinder, or electric actuator) and a conveying assembly (roller conveyor or rotating tray). Driven by electricity, they enable automatic lifting, horizontal movement, and rotation of the mold. The hydraulic cylinder or electric actuator replaces manual lifting, completely freeing up workers' physical strength. The stroke adjustment function of the lifting assembly allows the mold to be precisely raised and lowered to the same height as the mounting surface, eliminating the need for manual lifting. CN222714405U introduces a gear-driven rotation function, and CN224197386U introduces a roller conveyor; both can assist in mold angle adjustment or translational insertion, greatly reducing alignment difficulty.

[0003] Although existing technologies CN222714405U and CN224197386U have solved the basic problems of manual handling, their own design also has shortcomings:

[0004] (1) Long R&D cycle and high maintenance difficulty: The existing technical solutions are all special equipment developed from scratch, requiring the customization and processing of a large number of non-standard parts. This not only leads to a long R&D cycle, but also makes later maintenance difficult and parts replacement difficult due to the use of many non-standard parts.

[0005] (2) The equipment is bulky and lacks flexibility: In order to support heavy molds, the existing technical solutions use a heavy steel structure base, which makes the whole machine heavy. This bulky structure makes it inflexible, difficult to push and turn, and unsuitable for frequent, short-distance transportation of small and medium-sized mold pieces.

[0006] (3) Complex system and high cost: The existing technical solutions integrate a large number of motors, electrical control systems, hydraulic stations and complex mechanical transmission mechanisms. This high complexity directly increases the manufacturing cost, and is not cost-effective for scenarios with limited budgets or where only light-load module handling needs to be addressed. Summary of the Invention

[0007] To address the shortcomings of the existing technologies, the technical problem to be solved by this invention is to provide a lightweight handling and assembly device for large-diameter molding dies. Based on a mature commercial platform, it features semi-mechanized improvements and lightweight design, reducing equipment complexity and cost while improving flexibility. This fills the market gap between "fully automated equipment is too expensive" and "pure manual labor is too tiring" in light-load, high-frequency application scenarios.

[0008] The technical solution adopted in this invention is as follows:

[0009] A lightweight handling and assembly device for large-diameter forming molds includes a lightweight hand-cranked stacker as a load-bearing and lifting base, and a rotating auxiliary device and a clamping mechanism mounted on the stacker.

[0010] The lightweight hand-cranked stacker includes a base, a column, a hand-cranked hydraulic pump, and a chain drive mechanism; the top side of the base is fixedly connected to the column; the hand-cranked hydraulic pump and the chain drive mechanism are disposed on the side of the column; a guide rail and a slider are mounted on the column; the output end of the chain drive mechanism is connected to the slider.

[0011] The hand-cranked hydraulic pump and chain drive mechanism constitute the main body of the lightweight hand-cranked stacker. This main body has a maximum load capacity of 120 kg and a lifting height range of 95–1365 mm. By modifying a mature commercial stacker platform, research and development and manufacturing costs are reduced. The overall design of the equipment uses a combination of high-strength aluminum alloy and steel structure to reduce the equipment's weight. The operating height and handle torque are ergonomically designed to reduce operator fatigue.

[0012] The rotating auxiliary device includes a rotary motor and a rotating tray that is fastened to the output end of the rotary motor; the rotary motor is fixed on the slider and slidably connected to the guide rail on the column; the upper and lower ends of the rotating tray symmetrically protrude to form two mounting plates parallel to the column.

[0013] The clamping mechanism consists of two support brackets with grooves in the middle, the grooves on the support brackets being adapted to the outer edge of the forming mold piece; the two support brackets are respectively horizontally mounted on the upper and lower mounting plates of the rotating tray.

[0014] Preferably, the output torque of the rotary motor is 500 N / m, which enables the module to rotate 360°.

[0015] By using a rotary motor to provide stable rotational power and adjusting the appropriate feed position, the problem of difficult manual alignment is solved, thus improving installation efficiency.

[0016] Preferably, the support bracket is two stainless steel plates with a groove in the middle, the groove being 55mm wide and 720mm long.

[0017] For hydroformed molds with a maximum diameter of 720mm and a thickness of 55mm, the grooves provide precise positioning and fixation, ensuring stability during lifting and rotation.

[0018] Preferably, the base is equipped with casters at the bottom, and the casters have a brake locking mechanism.

[0019] Preferably, the top of the column is provided with an anti-tipping bracket.

[0020] Preferably, the hand-cranked hydraulic pump has an integrated overload protection safety valve.

[0021] By setting up multiple safety mechanisms such as mechanical locking, anti-tipping, and overload protection, the equipment is ensured to operate within the rated load range (120kg). When actually carrying the heaviest module (approximately 66.6kg), a safety margin of 44.5% is retained to meet the requirements for safe use.

[0022] The workflow of this invention is as follows: A dedicated mold handling equipment is pushed to the mold storage area, and the support bracket is lowered to its lowest position (95mm). The support bracket is then inserted into the center area of ​​the bottom of the mold. A hand-cranked hydraulic pump drives a chain transmission mechanism to smoothly lift the mold to an appropriate height (up to 1365mm, meeting the installation height requirement of 1200mm from the ground to the center point of the mold piece). The mold is then pushed to the press, and a rotary motor is started to rotate the rotary tray 360° to adjust the mold's feed position. After fine-tuning the vehicle position to align the mold with the mounting surface, the hydraulic system is slowly released to accurately position the mold. Two grooved support brackets serve to fix the stamping mold piece during clamping, preventing slippage.

[0023] The beneficial effects obtained by adopting the above technical solution are as follows:

[0024] (1) This invention directly selects and modifies a mature commercial stacker platform, which has a complete hydraulic lifting system and a high-strength structure. Since it uses standardized commercial products, it does not need to go through a long customization and processing cycle. Furthermore, due to its complete standard parts system, it is extremely convenient to repair and replace the faulty parts, which greatly reduces the maintenance threshold and downtime.

[0025] (2) The present invention adopts aluminum-steel composite materials and lightweight design, which greatly reduces the weight of the equipment. At the same time, its driving method returns to "hand-cranked". The modified equipment is lightweight and easy to push, making it particularly suitable for frequent transfer of small and medium-sized modules and flexible scheduling in the workshop. The hand-cranked drive avoids the battery management and cable constraints of electric equipment, making it more suitable for complex factory environments and high safety requirements.

[0026] (3) The present invention adopts a “semi-mechanized” operation mode and modular installation, retains the simple and reliable core action of hand-cranked lifting, and when angle adjustment is required, a low-cost rotary motor and a simple stainless steel clamping mechanism are selected; while retaining the core functions such as lifting, rotating and positioning, the total cost is controlled at a very low level. At the same time, the simplification of the structure also means a lower failure rate and higher reliability, achieving a balance between safety, efficiency and low cost. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a lightweight handling and assembly device for a large-diameter molding die according to the present invention.

[0028] Figure 2 This is a partial enlarged view of the rotation assist device and clamping mechanism of the present invention.

[0029] The components in the attached diagram are labeled as follows:

[0030] 1. Base; 11. Casters; 2. Column; 3. Slider; 4. Rotary motor; 5. Rotary tray; 51. Mounting plate; 6. Support bracket; 61. Groove. Detailed Implementation

[0031] The technical solution of the present invention will now be described more clearly and completely with reference to the accompanying drawings.

[0032] This invention provides a lightweight handling and assembly device for large-diameter molding dies, such as... Figure 1 and Figure 2 As shown, it mainly includes a lightweight hand-cranked stacker, a rotation auxiliary device, and a clamping mechanism.

[0033] The lightweight hand-cranked stacker includes a base 1, a column 2, a hand-cranked hydraulic pump, and a chain drive mechanism; the top side of the base 1 is fixedly connected to the column 2; the hand-cranked hydraulic pump and the chain drive mechanism are disposed on the side of the column; a guide rail and a slider 3 are installed on the column 2; the output end of the chain drive mechanism is connected to the slider 3.

[0034] The rotating auxiliary device includes a rotary motor 4 and a rotating tray 5 that is fastened to the output end of the rotary motor. The rotary motor 4 is fixed on the slider 3 and slidably connected to the guide rail on the column 2. The upper and lower ends of the rotating tray 5 symmetrically protrude to form two mounting plates 51 that are parallel to the column 2.

[0035] The clamping mechanism consists of two support brackets 6 with grooves in the middle. The grooves 61 on the support brackets are adapted to the outer edge of the forming mold piece. The two support brackets 6 of the clamping mechanism are horizontally mounted on the upper and lower mounting plates 51 of the rotating tray 5, respectively.

[0036] In practice, the lightweight hand-cranked stacker is a commercially available, mature mini stacker (such as the Zhenkunxing mini stacker), whose rated load meets the handling requirements of small and medium-sized mold pieces. The stacker uses a manual hydraulic pump to drive the hydraulic cylinder, achieving vertical lifting and lowering of the support frame, and uses a mechanical locking mechanism to fix the height to match the mounting surface height of different hydroforming equipment.

[0037] To solve the alignment problem of irregularly shaped mold pieces, the aforementioned rotation auxiliary device is installed on the stacker truck. This device includes an optional rotary motor and a matching reducer. The operator can drive the rotary motor through a control handle to rotate the support frame 360 ​​degrees, thereby easily completing the fine-tuning of the mold angle and precise positioning in a confined space.

[0038] In addition, a stainless steel clamping mechanism is provided for irregularly shaped mold pieces. This clamping mechanism can firmly lock the mold pieces and prevent them from slipping or shifting during handling and rotation.

[0039] During operation, the operator first pushes a lightweight stacker to the mold storage area and uses a clamping mechanism to secure the mold pieces. Then, a hand-cranked hydraulic system is used to lift the mold to a height level with the target equipment. Next, a rotary motor is started to fine-tune the mold angle to align it with the equipment interface. Finally, the mold is pushed into the equipment to complete the installation. The entire process is semi-mechanized, completely freeing up manpower while ensuring extremely high safety and alignment accuracy.

Claims

1. A lightweight handling and assembly device for large-diameter forming molds, characterized in that, Includes a lightweight hand-cranked stacker, a rotating auxiliary device, and a clamping mechanism; The lightweight hand-cranked stacker includes a base (1), a column (2), a hand-cranked hydraulic pump, and a chain drive mechanism; the top side of the base (1) is fixedly connected to the column (2); the hand-cranked hydraulic pump and the chain drive mechanism are located on the side of the column (2); a guide rail and a slider (3) are installed on the column (2); the output end of the chain drive mechanism is connected to the slider (3); The rotating auxiliary device includes a rotating motor (4) and a rotating tray (5) that is fastened to the output end of the rotating motor; the rotating motor (4) is fixed on the slider (3) and slidably connected to the guide rail on the column; the rotating tray (5) has two mounting plates (51) that are parallel to the column (2) and protrude symmetrically at the upper and lower ends. The clamping mechanism consists of two support brackets (6) with grooves in the middle. The grooves (61) on the support brackets are adapted to the outer edge of the forming mold. The two support brackets (6) are respectively horizontally installed on the upper and lower mounting plates (51) of the rotating tray (5).

2. The handling and assembly device according to claim 1, characterized in that, The output torque of the rotary motor (4) is 500 N / m.

3. The handling and assembly device according to claim 1, characterized in that, The groove (61) has a width of 55 mm and a length of 720 mm.

4. The handling and assembly device according to claim 1, characterized in that, The base (1) is equipped with casters (11) at the bottom, and the casters (11) are equipped with brake locking mechanisms.

5. The handling and assembly device according to claim 1, characterized in that, The top of the column (2) is provided with an anti-tipping bracket.

6. The handling and assembly device according to claim 1, characterized in that, The hand-cranked hydraulic pump has an integrated overload protection safety valve.

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