Hoverable safety door for a fully automatic sintering machine

Abstract

The utility model discloses a kind of for full-automatic sintering machine's hoverable safety door, it is related to chip production equipment safety protection technical field, its technical scheme main point is: including: full-automatic sintering machine body, the full-automatic sintering machine body front two sides are equipped with the door frame compatible with safety door;Safety door body, with the door frame matching, for closing or opening full-automatic sintering machine body internal space;Hinge assembly, one end is fixed in the inner top of the door frame, the other end is connected with the corresponding top edge of the safety door body, so that safety door body rotates around hinge shaft center;Spring component, its two ends are connected with the safety door body and the door frame respectively, with tension inflection point;Door closer, its two ends are connected with the safety door body and the door frame respectively, its tension linearly decreases with the increase of safety door body opening angle, effect is to realize arbitrary angle hover in 30 °-120 ° interval, without artificial aid support fixed, maintenance operation step reduces 30%, single maintenance time shortens 25%.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for chip manufacturing equipment, and more specifically, it relates to a hovering safety door for a fully automatic sintering machine. Background Technology

[0002] In the chip manufacturing industry, fully automated sintering machines are the core equipment in the packaging process. The internal sintering process needs to be carried out in a nitrogen protective atmosphere to ensure the stability of the chip's electrical performance. In addition, the equipment needs to be maintained at high frequency (such as replacing the embedded ejector pin module of the sintering mold and overhauling the six-axis robotic arm), which puts forward a critical requirement for the matching safety door.

[0003] However, existing safety doors in fully automatic sintering machines generally suffer from technical bottlenecks, making it difficult to meet the aforementioned requirements: Firstly, regarding smooth opening, existing safety doors lack a coordinated design between spring components with tension inflection points and linear force-reducing door closers. During the opening process, the outward shift of the center of gravity generates a continuously increasing variable opening torque, and there is fixed friction between the door and the hinges. Existing structures can only provide constant or non-adaptive tension, failing to dynamically offset the variable torque and friction. This leads to problems such as door jamming, uneven force distribution, and even the need for additional large pushing forces during opening, resulting in a poor user experience and accelerated component wear. Secondly, regarding arbitrary hovering, existing safety doors lack a "dynamic tension balance" mechanism, limiting the range of 30°-120°. Within the commonly used angle range, it is impossible to balance the force on the door through coordinated tension. The door either closes automatically or remains open, requiring manual fixation with auxiliary tools such as brackets, which not only increases maintenance steps and time costs. Thirdly, in terms of door sealing, existing safety doors mostly use a constant pressure sealing structure, without a design that "increases the tension as the angle increases in the 0-10° range." However, sintering machines have extremely high requirements for nitrogen sealing accuracy. The constant sealing pressure cannot adapt to the dynamic changes in the sealing gap during door closure, which can easily lead to nitrogen leakage and affect the chip sintering yield. At the same time, the materials of some safety door sealing components are not suitable for the dust and nitrogen environment of the sintering machine workshop, and are prone to aging and failure after long-term use, further aggravating sealing defects.

[0004] Therefore, in order to solve the above-mentioned technical problems, this application proposes a hovering safety door for a fully automatic sintering machine. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a hovering safety door for a fully automatic sintering machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hovering safety door for a fully automatic sintering machine, comprising: The fully automatic sintering machine body has door frames on the front two sides that are compatible with safety doors; A safety door, matching the door frame, is used to close or open the internal space of the fully automatic sintering machine. The hinge assembly has one end fixed to the inner top of the door frame and the other end connected to the corresponding top edge of the safety door body, so that the safety door body can rotate around the hinge axis. A spring component, with its two ends connected to the safety door body and the door frame respectively, has a tension inflection point. When the opening angle of the safety door body is in the range of 0-10°, the tension of the spring component increases with the increase of the opening angle to provide assistance to the safety door body in the closing direction and achieve door sealing. When the opening angle of the safety door body exceeds 10°, the spring component passes the tension inflection point, the tension direction reverses and increases with the increase of the opening angle to provide assistance to the safety door body in the opening direction. The door closer has its two ends connected to the safety door body and the door frame, respectively. Its tension decreases linearly as the opening angle of the safety door body increases. The dynamic tension of the spring component works in conjunction with the tension of the door closer to counteract the variable opening torque caused by the outward shift of the center of gravity when the safety door body is opened, as well as the friction between the safety door body and the hinge assembly. This enables the safety door body to open smoothly, hover arbitrarily in the 30°-120° range, and close and seal in the 0-10° range.

[0007] Preferably, the spring component and the door closer are arranged in two sets symmetrically with respect to the safety door body.

[0008] Preferably, the spring component is a stainless steel tension spring, which is suitable for the dust and nitrogen environment of the sintering machine workshop.

[0009] Preferably, the opening angle of the safety door corresponding to the tension inflection point of the spring component is 5-10°, the tension increase of the spring component in the 0-10° range is 6-18N / °, and the maximum positive tension at 10° is 32-45N; after 10°, the increase of the reverse tension with the opening angle is 5-15N / °, and the maximum reverse tension at 120° is 75-90N, ensuring the force balance accuracy at different opening stages.

[0010] Preferably, the door closer is a hydraulic door closer with a tension adjustment range of 12-55N. When the opening angle of the safety door increases from 10° to 120°, the tension of the door closer decreases linearly from 55N to 12N, forming a constant resultant force of 70-95N with the reverse tension of the spring component, which precisely counteracts the variable opening torque of 30-115N·m generated by the outward shift of the center of gravity of the safety door.

[0011] Preferably, the contact edge between the safety door and the door frame is provided with an EPDM sealing strip. The positive tension of the spring component makes the sealing strip adhere to the door frame with a pressure ≥28N, thereby controlling the nitrogen leakage inside the fully automatic sintering machine to below 0.1L / min and preventing external dust from entering.

[0012] Preferably, the hinge assembly includes 2-3 heavy-duty hinges, and the heavy-duty hinges are equidistantly distributed along the top length direction inside the door frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model uses the dynamic tension synergy between the spring component and the door closer to counteract the variable torque and friction, ensuring a smooth and uninterrupted opening process for the safety door. The manually applied opening force is ≤15N, making operation easy and reducing component wear, thus solving the problem of smooth opening in the background technology. 2. This utility model enables hovering at any angle within the range of 30°-120° without the need for manual fixation with a bracket, reducing maintenance steps by 30% and shortening single maintenance time by 25%, thereby solving the problems in arbitrary hovering in the prior art; 3. This utility model features a design that increases tensile force in the 0-10° range, providing assistance in the closing direction. Combined with EPDM sealing strips, it achieves a bonding pressure ≥28N and a nitrogen leakage rate ≤0.1L / min, meeting the high-purity nitrogen protection requirements of sintering machines and improving chip sintering yield by 3%-5%, thus solving the problems in door sealing in the background technology. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Another perspective on the specific structure; Figure 3 This utility model Figure 2 Enlarged view of partial structure A (the elastic component in the figure is not connected to the safety door body. When connecting, simply hang the hook on it on the pre-set connector of the safety door body).

[0015] In the diagram: 1. Fully automatic sintering machine body; 2. Door frame; 3. Safety door body; 4. Hinge assembly; 41. Heavy-duty hinge; 5. Spring components; 6. Door closer. Detailed Implementation

[0016] like Figure 1-3 As shown, this utility model provides a hovering safety door for a fully automatic sintering machine. Its core technical solution is achieved through "precise component selection + tensile force coordination design + working condition adaptation optimization". The specific structure and working principle are as follows: (1) Composition and connection relationship of core components This safety door includes the fully automatic sintering machine body 1, door frame 2, safety door body 3, hinge assembly 4, spring assembly 5, and door closer 6. The connection and functional positioning of each component are as follows: Fully automatic sintering machine body 1 and door frame 2: The door frame 2 is integrated on the front and rear sides of the fully automatic sintering machine body 1. It is made of cold-rolled steel plate and welded to the machine frame to provide a stable installation base for the safety door. Its size is precisely matched with the safety door body 3 to ensure that the sealing gap when closed is ≤0.5mm. Safety door 3: Adapted to door frame 2, used to close or open the internal space of the machine. Its material and structure are adapted to the sintering machine's "working condition observation + structural strength" requirements, and can observe the internal chip sintering and robotic arm transfer status in real time. Hinge assembly 4: Serves as a rotation support for the safety door body 3. One end is fixed to the inner top of the door frame 2, and the other end is connected to the corresponding top edge of the safety door body 3. The safety door body 3 can rotate flexibly around the hinge axis. The assembly includes 2-3 heavy-duty hinges 41, which are evenly distributed along the inner top of the door frame to ensure that the safety door body 3 is subjected to uniform force when rotating and to avoid tilting. Spring component 5: Enables dynamic switching between "closing assistance" and "opening assistance". It is connected to the safety door body 3 and the door frame 2 at both ends and has a clear tension inflection point. When the opening angle of the safety door body 3 is in the range of 0-10°, the tension increases with the increase of the angle, applying closing assistance to the safety door body 3 to enhance the seal. When the angle exceeds 10°, the tension reverses and increases with the increase of the angle, applying opening assistance to the safety door body 3 to assist in opening. Door closer 6: It realizes "linear force reduction" adjustment. Its two ends are connected to the safety door body 3 and the door frame 2 respectively. The pulling force decreases linearly as the opening angle of the safety door body 3 increases. It works in conjunction with the dynamic pulling force of the spring component 5 to form a constant resultant force, which counteracts the variable opening torque and friction of the safety door body 3.

[0017] (2) Key technology design: tension coordination and functional realization Smooth opening is achieved through the "dynamic force combination" formed by the tension inflection point design of spring component 5 and the linear force reduction design of door closer 6. In the 0-10° range, the forward tension of the spring (increase of 6-18N / °) and the initial tension of door closer 6 (55N) work together to counteract the initial opening torque and friction of the safety door 3, preventing jamming. After 10°, the reverse tension of spring component 5 (increase of 5-15N / °) increases with the angle, while the tension of door closer 6 (linearly decreases from 55N to 12N) decreases with the angle. The combined force of the two stabilizes at 70-95N, which precisely counteracts the 30-115N·m variable opening torque of the safety door 3 caused by the outward shift of the center of gravity and the friction between the safety door 3 and the hinge assembly 4, ensuring that the opening process of the safety door 3 is smooth and without jamming. The manually applied opening force is ≤15N, making operation easy. The aforementioned positive pulling force is in the direction of closing the safety door 3, while the reverse pulling force is in the direction of opening the safety door 3.

[0018] Achieving arbitrary hovering within the 30°-120° range: Within the commonly used maintenance range of 30°-120°, the resultant force of the reverse pull of spring component 5 and the pull of door closer 6 is always in balance with the variable opening torque and friction of safety door body 3. For example, at 30°, the reverse pull of spring component 5 is about 45N, the pull of door closer 6 is about 40N, and the resultant force is 85N, which cancels out the torque of 50N·m and the friction force of 10N; at 90°, the reverse pull of spring component 5 is about 70N, the pull of door closer 6 is about 20N, and the resultant force is 90N, which cancels out the torque of 95N·m and the friction force of 12N; at 120°, the reverse pull of spring component 5 is about 90N, the pull of door closer 6 is about 12N, and the resultant force is 102N, which cancels out the torque of 115N·m and the friction force of 15N. In this balanced state, safety door body 3 can stay at any angle within this range without manual support. Achieving door sealing in the 0-10° range: The contact edge between the safety door body 3 and the door frame 2 is provided with EPDM sealing strips. Within the 0-10° range, the positive tension of the spring component 5 (direction is the closing direction of the safety door body 3) is positively correlated with the opening angle of the safety door body 3. When the safety door body 3 is in the "opening process" (opening angle increases from 0° to 10°), the positive tension increases with the increase of the opening angle, reaching the maximum positive tension (32-45N) in the range at 10°. The closing direction assistance formed by this positive tension will push the EPDM sealing strips on the contact edge between the safety door body 3 and the door frame 2 to press tightly, ultimately making the sealing strip and the door frame 2 adhere to a pressure ≥28N. This can control the nitrogen leakage inside the fully automatic sintering machine body 1 to below 0.1L / min, while blocking the intrusion of external dust, thus meeting the nitrogen protection requirements of the sintering machine.

[0019] (3) Working condition adaptation optimization design Material compatibility: Spring component 5 is made of stainless steel tension spring with a corrosion resistance grade ≥ SUS304, which can withstand the dust erosion and nitrogen environment corrosion in the sintering machine workshop and has a service life of ≥ 5 years; EPDM sealing strips are resistant to aging and nitrogen, and the sealing performance decreases by ≤ 5% after long-term use; Balanced force distribution: There are two sets of spring components 5 and door closers 6, which are symmetrically arranged relative to the safety door body 3 to control the tilt of the door body within 0.5mm, further improving the smoothness of opening and the stability of hovering. Easy maintenance: The hinge assembly 4 has 2-3 heavy-duty hinges 41 with wear-resistant bushings inside the bushings, with a friction coefficient ≤0.05 and a service life ≥50,000 times. It is suitable for the high-frequency maintenance needs of sintering machines 10-15 times per month, reducing the frequency of component replacement.

[0020] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A cantilevered safety door for a fully automatic sintering machine, characterized in that: include: The fully automatic sintering machine body (1) has door frames (2) adapted to the safety door on the two front sides of the fully automatic sintering machine body (1). Safety door (3), matching the door frame (2), is used to close or open the internal space of the fully automatic sintering machine body (1); The hinge assembly (4) is fixed at one end to the inner top of the door frame (2) and the other end is connected to the corresponding top edge of the safety door body (3), so that the safety door body (3) can rotate around the hinge axis. The spring component (5) has its two ends connected to the safety door body (3) and the door frame (2) respectively. It has a tension inflection point. When the opening angle of the safety door body (3) is in the range of 0-10°, the tension of the spring component (5) increases with the increase of the opening angle to provide assistance to the safety door body (3) in the closing direction and realize the closing seal. When the opening angle of the safety door body (3) exceeds 10°, the spring component (5) passes the tension inflection point, the tension direction is reversed and increases with the increase of the opening angle to provide assistance to the safety door body (3) in the opening direction. The door closer (6) is connected to the safety door body (3) and the door frame (2) at both ends respectively. Its pulling force decreases linearly as the opening angle of the safety door body (3) increases. The dynamic pulling force of the spring component (5) works in conjunction with the pulling force of the door closer (6) to counteract the variable opening torque caused by the outward shift of the center of gravity when the safety door body (3) is opened and the friction between the safety door body (3) and the hinge assembly (4), so as to realize the smooth opening of the safety door body (3), arbitrary suspension in the range of 30°-120° and door sealing in the range of 0-10°.

2. A cantilevered safety door for a fully automatic sintering machine according to claim 1, characterized in that: The spring component (5) and the door closer (6) are both arranged symmetrically with respect to the safety door body (3).

3. A cantilevered safety door for a fully automatic sintering machine according to claim 1, characterized in that: The spring component (5) is a stainless steel tension spring, which is suitable for the dust and nitrogen environment of the sintering machine workshop.

4. A cantilevered safety door for a fully automatic sintering machine according to claim 1, characterized in that: The opening angle of the safety door body (3) corresponding to the inflection point of the tension of the spring component (5) is 5-10°. The tension of the spring component (5) increases by 6-18N / ° within the 0-10° range. At 10°, the maximum positive tension is 32-45N. After 10°, the reverse tension increases by 5-15N / ° with the increase of the opening angle. At 120°, the maximum reverse tension is 75-90N, ensuring the force balance accuracy at different opening stages.

5. A hovering safety door for a fully automatic sintering machine according to claim 1, characterized in that: The door closer (6) is a hydraulic door closer with a tension adjustment range of 12-55N. When the opening angle of the safety door (3) increases from 10° to 120°, the tension of the door closer (6) decreases linearly from 55N to 12N, forming a constant resultant force of 70-95N with the reverse tension of the spring component (5), which precisely counteracts the variable opening torque of 30-115N·m generated by the outward shift of the center of gravity of the safety door (3).

6. A hovering safety door for a fully automatic sintering machine according to claim 1, characterized in that: The contact edge between the safety door body (3) and the door frame (2) is provided with EPDM sealing strips. The positive tension of the spring component (5) makes the sealing strip adhere to the door frame (2) with a pressure ≥28N, controlling the nitrogen leakage inside the fully automatic sintering machine body (1) to below 0.1L / min, while blocking external dust from entering.

7. A hovering safety door for a fully automatic sintering machine according to claim 1, characterized in that: The hinge assembly (4) includes 2-3 heavy-duty hinges (41), and the heavy-duty hinges (41) are equidistantly distributed along the top length of the door frame (2).

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