Upper cross beam structure of closed four-point high-speed precision press
By using a symmetrical split upper beam structure and a non-uniform connecting rod span design, the problems of machining accuracy and structural flexibility of traditional presses are solved, achieving high precision, low cost and high reliability of the equipment, and adapting to the needs of complex stamping processes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-04-07
AI Technical Summary
The traditional closed-type press has shortcomings in terms of machining accuracy, structural flexibility, bearing application and connecting rod span design, resulting in increased equipment vibration and noise, high cost, long production cycle and poor reliability.
It adopts a symmetrical split upper crossbeam structure, and achieves precision adjustment through mounting plane fitting and bolt connection. The connecting rod span is non-uniformly distributed, sliding bearings are used instead of rolling bearings, and the hole system layout is optimized.
It improves processing accuracy and stability, reduces equipment vibration and noise, extends service life, reduces costs, enhances structural reliability and load-bearing capacity, and adapts to changes in stamping pressure in different processes.
Smart Images
Figure CN224089750U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of press technology, and in particular to the upper crossbeam structure of a closed four-point high-speed precision press. Background Technology
[0002] The traditional closed-type press upper beam structure has revealed numerous problems during processing and use. In terms of processing technology, controlling the machining accuracy of its hole system is difficult. When using conventional processing methods, such as multi-axis machining centers or boring machines, the complex structure and large size of the upper beam make it difficult to guarantee the coaxiality of the mounting holes. Deviations in the coaxiality of the hole system directly affect the crankshaft installation accuracy, leading to increased vibration and noise during press operation, reducing the equipment's service life and stamping accuracy.
[0003] From a structural design perspective, most existing upper crossbeams are integral structures, lacking a flexible precision adjustment mechanism. Once the hole system is found to be substandard after processing, it is difficult to make effective corrections, often requiring the entire upper crossbeam to be reprocessed, which greatly increases production costs and production cycle.
[0004] In bearing applications, large-size rolling bearings are typically selected to compensate for the impact of insufficient bore precision. While rolling bearings can withstand radial and axial loads to a certain extent, they suffer from drawbacks such as large radial dimensions and limited load-bearing capacity. Moreover, rolling bearings have higher manufacturing costs and more complex maintenance requirements, further increasing the overall cost of the press.
[0005] Furthermore, the connecting rod span design of traditional presses is relatively simple, typically employing a uniform arrangement. However, in actual stamping processes, the required stamping pressure varies significantly between different stages. For example, the stamping pressure is higher during the initial rough forming of the sheet metal, while the stamping pressure is relatively lower in subsequent finishing processes. A uniform connecting rod span cannot accommodate this variation in stamping pressure, resulting in uneven stress on the connecting rods during operation. Some connecting rods bear excessive bending moments, making them prone to fatigue damage and affecting the overall performance and reliability of the press.
[0006] In summary, existing closed-type press upper beam structures have shortcomings in terms of machining accuracy, structural flexibility, bearing application, and connecting rod span design, failing to meet the ever-increasing performance demands of modern manufacturing for high-speed precision presses. In view of these technical problems, this application proposes a closed-type four-point high-speed precision press upper beam structure that optimizes the hole arrangement, facilitates accuracy adjustment, and reduces costs. Utility Model Content
[0007] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an upper crossbeam structure for a closed four-point high-speed precision press, which aims to solve the technical problems such as the difficulty in adjusting the pore accuracy of the upper crossbeam structure of the press in the prior art.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A closed-type four-point high-speed precision press has an upper crossbeam structure, including an upper crossbeam with a symmetrical structure. Mounting holes are provided at both ends of the upper crossbeam, each mounting hole housing a first sliding bearing seat, and at least one mounting hole housing a flywheel seat. A first mounting seat is provided in the middle of the upper crossbeam, and a second mounting seat is detachably mounted on the first mounting seat. Lower bearing seats are provided at both ends of the first mounting seat, and upper bearing seats are provided at both ends of the second mounting seat. Each upper bearing seat and its corresponding lower bearing seat form a second sliding bearing seat.
[0010] Furthermore, in the upper crossbeam structure of the closed four-point high-speed precision press, the bottom of the upper crossbeam is provided with a first connecting rod hole, a second connecting rod hole, a third connecting rod hole, and a fourth connecting rod hole; the second connecting rod hole and the third connecting rod hole are located on the outside of the first mounting seat, and the first connecting rod hole and the fourth connecting rod hole are respectively located on the inside of the corresponding first bearing seat.
[0011] Furthermore, in the upper crossbeam structure of the closed four-point high-speed precision press, the center distance between the first connecting rod hole and the second connecting rod hole is L2, the center distance between the second connecting rod hole and the third connecting rod hole is L1, and the center distance between the third connecting rod hole and the fourth connecting rod hole is L2; wherein, L1 > L2.
[0012] Furthermore, in the upper crossbeam structure of the closed four-point high-speed precision press, L1 is 1.2 to 1.5 times L2.
[0013] Furthermore, in the upper beam structure of the closed four-point high-speed precision press, the upper surface of the first mounting base is provided with a first mounting plane, and the lower surface of the second mounting base is provided with a second mounting plane; the first mounting plane and the second mounting plane are in contact.
[0014] Furthermore, in the upper crossbeam structure of the closed four-point high-speed precision press, the first mounting base is provided with multiple first connecting holes, and the second mounting base is provided with a number of second connecting holes that are equal to and correspond one-to-one with the number of first connecting holes; each first connecting hole and its corresponding second connecting hole are provided with bolts.
[0015] Furthermore, in the upper crossbeam structure of the closed four-point high-speed precision press, flywheel seats are provided in both mounting holes.
[0016] Furthermore, in the upper beam structure of the closed four-point high-speed precision press, each flywheel seat is provided with a first oil inlet and an oil outlet; each first sliding bearing seat is provided with a second oil inlet, and each second oil inlet is aligned with the first oil inlet on the same side.
[0017] Beneficial effects: This utility model provides an upper crossbeam structure for a closed four-point high-speed precision press, which has at least the following advantages compared to the prior art:
[0018] (1) Improved machining accuracy and stability: The upper crossbeam adopts a unique split structure, with the first and second mounting seats connected by fitting mounting planes and bolts. This design facilitates machining and reduces the overall machining difficulty. On the other hand, when a deviation in the hole system accuracy is detected, it can be finely adjusted by fitting the mounting plane to ensure the coaxiality of the crankshaft after installation, reduce vibration and noise during equipment operation, improve the stamping accuracy and stability of the press, and extend the service life of the equipment.
[0019] (2) Optimize stress and load-bearing capacity: The connecting rod span adopts a non-uniform arrangement, so that the force application point of the press is located on the outside. During the stamping process, this design can better adapt to the changes in stamping pressure of different processes, reduce the bending moment of the connecting rod, avoid damage caused by excessive local stress, improve the structural reliability and load-bearing capacity of the press, broaden the application range of the press, and meet the needs of more complex stamping processes.
[0020] (3) Reduced operating and maintenance costs: After structural optimization, sliding bearings can be installed in the hole system to replace large-size rolling bearings. Sliding bearings not only have high load-bearing capacity and small radial dimensions, but also have low manufacturing costs and simple maintenance, effectively reducing the overall cost of the press. At the same time, the split structure and easy-to-adjust design reduce the reprocessing costs caused by accuracy issues and improve production efficiency. Attached Figure Description
[0021] Figure 1 A simplified structural diagram of the upper crossbeam structure of the closed four-point high-speed precision press provided by this utility model.
[0022] Figure 2 for Figure 1 Sectional view of AA.
[0023] Figure 3 This is a schematic diagram showing the span of the four connecting rods of the crankshaft.
[0024] Numbering on the map:
[0025] 1. Upper crossbeam;
[0026] 2. First sliding bearing housing; 211. First sliding bearing; 201. Second oil inlet;
[0027] 3. Flywheel housing; 301. First oil inlet; 302. Oil return port;
[0028] 4. First mounting base; 400. First mounting plane; 41. Lower bearing housing; 411. Lower sliding bearing;
[0029] 5. Second mounting base; 500. Second mounting plane; 51. Upper bearing housing; 511. Upper sliding bearing;
[0030] 61. Bolt; 62. Nut;
[0031] 91. The stamping slide of a press; 921, 922, 923, 924. The crankshaft connecting rod of a press; 93. The crankshaft of a press. Detailed Implementation
[0032] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.
[0033] Please see Figure 1 and 2 This utility model provides an upper crossbeam structure for a closed-type four-point high-speed precision press. The accompanying drawings are for illustrative purposes only and are not proportional to the actual product. The drawings only show structures relevant to this utility model; some conventional structures are not specifically depicted. To facilitate observation of the internal structure, Figure 1 A sectional view was used, with the section being the vertical plane passing through the axis of the upper crossbeam. Because... Figure 1 It is a sectional view. Figure 2 exist Figure 1 Continue creating a sectional view based on the existing structure; you should only see... Figure 2 The left half of the content, but for easier understanding of the overall structure of the upper beam, Figure 2 The right half has been completed.
[0034] The terms "first," "second," etc., used herein are merely different names for similar structures for ease of explanation and are not intended to limit this application. The term "multiple" herein refers to an indeterminate number greater than or equal to two; since the quantity of the structures referred to is not a point of utility model, it is not specifically limited.
[0035] Please see Figure 1 and Figure 2A closed-type four-point high-speed precision press has an upper crossbeam structure, including an upper crossbeam 1, which is a symmetrical structure. The two ends of the upper crossbeam are respectively provided with mounting holes (not labeled in the figure), each mounting hole is provided with a first sliding bearing seat 2, and at least one mounting hole is provided with a flywheel seat 3. The middle part of the upper crossbeam is provided with a first mounting seat 4 (preferably integrally formed), and a second mounting seat 5 is detachably provided on the first mounting seat. The two ends of the first mounting seat are respectively provided with lower bearing seats 41, and the two ends of the second mounting seat are respectively provided with upper bearing seats 51. Each upper bearing seat and its corresponding lower bearing seat form a second sliding bearing seat.
[0036] Two first sliding bearing housings and two second sliding bearing housings provide four-point support for the crankshaft of the closed four-point high-speed precision press. In practical applications, each first sliding bearing housing is equipped with a sliding bearing 211, each lower bearing housing of the first mounting base is equipped with a lower sliding bearing 411, and each upper bearing housing of the second mounting base is equipped with an upper sliding bearing 511. The upper and lower sliding bearings can be oppositely arranged bearing bushes to form a complete sliding bearing.
[0037] like Figure 1 As shown, the bottom of the upper crossbeam is provided with a first connecting rod hole 101, a second connecting rod hole 102, a third connecting rod hole 103, and a fourth connecting rod hole 104; the second and third connecting rod holes are located on the outer side of the first mounting seat, and the first and fourth connecting rod holes are located on the inner side of their respective first bearing seats. Please refer to further details. Figure 3 , Figure 3 The diagram schematically shows the press's punching slide 91, crankshaft 93, and four crankshaft connecting rods (921, 922, 923, and 924), which pass through the first connecting rod hole 101, the second connecting rod hole 102, the third connecting rod hole 103, and the fourth connecting rod hole 104, respectively.
[0038] Please see Figure 1 and Figure 3 Furthermore, the center distance between the first and second connecting rod holes is L2, the center distance between the second and third connecting rod holes is L1, and the center distance between the third and fourth connecting rod holes is L2; where L1 > L2. In traditional presses, the uniform spacing of the connecting rods leads to uneven force distribution. This invention, by limiting the design to L1 > L2 (L1 being the center distance between the second and third connecting rod holes, and L2 being the center distance between the first and second connecting rod holes and the third and fourth connecting rod holes), achieves a non-uniform arrangement of connecting rod spans. During stamping, the initial stamping pressure is high; a larger L1 value allows the outer connecting rods to withstand greater forces, while the inner connecting rods with smaller spans can also distribute the force reasonably, reducing connecting rod bending moments, avoiding damage from excessive local stress, and improving the structural reliability of the press.
[0039] In practical applications, the position of the connecting rod hole is matched with the crankshaft support point to ensure the stability of the crankshaft during operation. When the crankshaft drives the slider to move up and down via the connecting rod, the position of the connecting rod hole makes the connection between the connecting rod and the crankshaft more reasonable, reducing crankshaft torsional deformation, extending crankshaft service life, and ensuring stable operation of the press.
[0040] Preferably, L1 is 1.2 to 1.5 times L2. This arrangement results in a smaller span between the two outer points (i.e., the length of L2) and a larger span between the two middle points (i.e., the length of L1). This causes the force application point of the four-point high-speed press to be located further outward, reducing potential off-center loading on the mold. This improves the accuracy and service life of the equipment.
[0041] Please see Figure 2 Furthermore, the upper surface of the first mounting base is provided with a first mounting plane 400, and the lower surface of the second mounting base is provided with a second mounting plane 500; the first mounting plane and the second mounting plane are in contact ( Figure 2 The first mounting plane 400 and the second mounting plane 500 are fitted together, so the marked positions are the same. Preferably, the flatness of the first mounting plane and the second mounting plane is 0.01~0.05mm, and the maximum gap is 0.03~0.08mm. The lower bearing seat on the first mounting seat and the upper bearing seat on the second mounting seat together form the second sliding bearing seat, providing support for the crankshaft. Due to the high fit between the two mounting planes, the relative positional accuracy of the upper and lower bearing seats can be guaranteed, ensuring the coaxiality of the crankshaft after installation. In addition, the fitted mounting planes facilitate the precision adjustment of the upper crossbeam. When it is necessary to adjust the accuracy of the hole system, the relative position between the two mounting seats can be changed by modifying one of the mounting planes. During the assembly process, positioning and installation can be quickly performed based on the fit, improving assembly efficiency. When a coaxiality deviation of the hole system is detected, the fitted planes can be fine-tuned to make the hole system accuracy meet the design requirements, reducing the difficulty of processing and assembly.
[0042] like Figure 2As shown, preferably, the first mounting base is provided with multiple first connecting holes (unnumbered in the figure, corresponding to the positions of bolts 61), and the second mounting base is provided with a number of second connecting holes that correspond one-to-one with the number of first connecting holes (unnumbered in the figure, corresponding to the positions of bolts 61). Each first connecting hole and its corresponding second connecting hole is provided with a bolt 61, and each bolt is provided with a nut 62. The multiple one-to-one corresponding connecting holes and bolts cooperate to form a uniformly distributed fastening connection between the first and second mounting bases. When the press is working, the preload generated by the bolts makes the two mounting bases fit tightly together, enhancing the rigidity of the overall structure. The impact and vibration during the stamping process will subject the mounting bases to complex stresses. This multi-point connection method can effectively disperse stress, avoid excessive local stress, reduce the risk of structural deformation, ensure the stability of the upper crossbeam under long-term, high-intensity work, and extend the service life of the equipment.
[0043] like Figure 1 As shown, preferably, both mounting holes are equipped with flywheel seats 3. The two flywheel seats can each mount a flywheel, increasing the flywheel's moment of inertia. During press operation, the flywheel can store more energy and release it during the stamping process, ensuring stable power output. Furthermore, the press generates torque during operation, and a single flywheel can easily lead to uneven stress on the upper crossbeam. The two flywheel seats, symmetrically distributed at both ends, effectively balance the torque.
[0044] Please continue reading. Figure 1 Furthermore, each flywheel housing is provided with a first oil inlet 301 and an oil outlet 302; each first sliding bearing housing is provided with a second oil inlet 201, and each second oil inlet is aligned with the first oil inlet on the same side. When the press is working, lubricating oil is injected from the first oil inlet of the flywheel housing, and through the aligned second oil inlet, it can accurately and smoothly enter the first sliding bearing housing, providing sufficient lubricating oil for the sliding bearing therein; the lubricating oil can flow out smoothly from the oil outlet, realizing the circulation of lubricating oil.
[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. An upper crossbeam structure for a closed-type four-point high-speed precision press, comprising an upper crossbeam, characterized in that: The upper crossbeam has a symmetrical structure. Mounting holes are provided at both ends of the upper crossbeam. Each mounting hole is provided with a first sliding bearing seat, and at least one mounting hole is provided with a flywheel seat. A first mounting seat is provided in the middle of the upper crossbeam. A second mounting seat is detachably mounted on the first mounting seat. Lower bearing seats are provided at both ends of the first mounting seat, and upper bearing seats are provided at both ends of the second mounting seat. Each upper bearing seat and its corresponding lower bearing seat form a second sliding bearing seat.
2. The upper crossbeam structure of the closed four-point high-speed precision press according to claim 1, characterized in that: The bottom of the upper crossbeam is provided with a first connecting rod hole, a second connecting rod hole, a third connecting rod hole and a fourth connecting rod hole; the second connecting rod hole and the third connecting rod hole are located on the outside of the first mounting seat, and the first connecting rod hole and the fourth connecting rod hole are located on the inside of the corresponding first bearing seat.
3. The upper crossbeam structure of the closed four-point high-speed precision press according to claim 2, characterized in that: The center distance between the first and second connecting rod holes is L2, the center distance between the second and third connecting rod holes is L1, and the center distance between the third and fourth connecting rod holes is L2; where L1 > L2.
4. The upper crossbeam structure of the closed four-point high-speed precision press according to claim 3, characterized in that: L1 is 1.2 to 1.5 times that of L2.
5. The upper crossbeam structure of the closed four-point high-speed precision press according to claim 1, characterized in that: The upper surface of the first mounting base is provided with a first mounting plane, and the lower surface of the second mounting base is provided with a second mounting plane; the first mounting plane and the second mounting plane are in contact.
6. The upper crossbeam structure of the closed four-point high-speed precision press according to claim 1, characterized in that: The first mounting base is provided with multiple first connecting holes, and the second mounting base is provided with a number of second connecting holes that are equal to and correspond one-to-one with the number of first connecting holes; each first connecting hole and its corresponding second connecting hole is provided with a bolt.
7. The upper crossbeam structure of the closed four-point high-speed precision press according to claim 1, characterized in that: Both mounting holes are equipped with flywheel mounts.
8. The upper crossbeam structure of the closed four-point high-speed precision press according to claim 7, characterized in that: Each flywheel housing is provided with a first oil inlet and an oil outlet; each first sliding bearing housing is provided with a second oil inlet, and each second oil inlet is aligned with the first oil inlet on the same side.