A suction disc tool for processing thin-walled parts

Abstract

The utility model relates to thin wall class spare processing frock technical field, concretely relates to a kind of chuck frock for thin wall class spare processing. Including bottom plate, suction part, sealing assembly and multiple limit parts, suction part is fixed by negative pressure spare to be processed, sealing assembly is constituted by sealing groove and sealing strip, along the periphery of suction part arrangement, with suction part and limit part jointly form closed continuous sealing structure, limit part is set to sealing assembly periphery, for with the outer edge of spare to be processed abut.In the contact state of limit part and spare to be processed, the distance of limit part to sealing assembly close to suction part side is defined as sealing margin, for determining the minimum reserved edge width required by spare to be processed.The utility model can reduce the waste of material by reducing the sealing margin of spare to be processed.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology for machining thin-walled parts, specifically to a suction cup tooling for machining thin-walled parts. Background Technology

[0002] In machining, thin-walled parts, due to their poor rigidity, are easily deformed by traditional clamping methods (such as mechanical vises), affecting machining accuracy and even leading to scrap. Therefore, the industry is gradually adopting suction cup fixtures based on the principle of vacuum adsorption. This fixture achieves non-contact, stable adsorption of parts by setting a sealing structure around the adsorption section and using a vacuum pump to create a pressure difference. It offers advantages such as uniform clamping force, no surface damage, and ease of automation.

[0003] However, in practical applications, it has been found that to ensure a sealing effect, existing suction cup tooling typically requires a 20-30mm sealing margin at the edge of the part, which is a safe distance between the effective machining area and the suction cup sealing area. This is to prevent the cutting force during machining from causing the part to shift and disrupting the fit between the sealing structure and the part. While a larger sealing margin helps improve sealing reliability, it also limits material utilization, increases part size requirements, causes waste, and increases manufacturing costs. Utility Model Content

[0004] The purpose of this invention is to provide a suction cup fixture for machining thin-walled parts, so as to solve the problem of material waste caused by the need to reserve a large sealing edge distance as mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A suction cup fixture for machining thin-walled parts includes a base plate, a sealing assembly, and multiple limiting members. The base plate is provided with an adsorption section for fixing the workpiece to be processed by negative pressure adsorption. The sealing assembly is arranged around the periphery of the adsorption section to form a closed and continuous boundary structure to achieve a sealing function during the adsorption process. The multiple limiting members are disposed around the sealing assembly and extend along its height direction to abut against the outer edge of the workpiece. When the workpiece is fixed by the adsorption section, the limiting members abut against the outer edge of the workpiece. At this time, the distance between the limiting members and the side of the sealing assembly near the adsorption section is defined as the sealing edge distance of the workpiece, which is used to limit the minimum reserved edge width required for the workpiece.

[0007] Furthermore, the sealing assembly includes a sealing groove and a sealing strip. The sealing groove is formed on the base plate and extends along the outer periphery of the adsorption portion. The sealing strip is embedded in the sealing groove and arranged along its extension direction. One side boundary of the sealing groove is formed by the outer edge of the adsorption portion, and the sealing strip is in contact with the adsorption portion. The other side boundary of the sealing groove is formed by the inner edge of the limiting member, and the sealing strip is in contact with the limiting member.

[0008] Furthermore, the adsorption part is provided with multiple air channels, each of which can be selectively connected to the sealing groove. When any air channel is connected to the sealing groove, the air channel is connected to the vacuum generating device. The multiple air channels are configured to extract air from the sealing groove through the vacuum generating device, thereby creating a negative pressure environment in the sealing groove so that the sealing strip is tightly fitted to the adsorption part and the limiting member respectively.

[0009] Furthermore, the adsorption part is provided with a clearance groove, which is used to cooperate with the holes on the workpiece. The clearance groove is a closed structure, which separates a portion of the multiple air passages, so that the air passages cannot remain continuous on their path through the clearance groove.

[0010] Furthermore, the limiting member is provided with a pickup groove, which extends along the depth direction of the limiting member, and the position of the pickup groove avoids the area directly opposite the sealing strip.

[0011] Furthermore, a support portion is provided on the base plate, and there is a height difference between the support portion and the adsorption portion.

[0012] Furthermore, the plurality of air channels are evenly distributed on the adsorption section, and the distance between adjacent air channels is 10-20 mm.

[0013] The advantages of the suction cup fixture for machining thin-walled parts described in this utility model compared to the prior art are as follows:

[0014] By setting a limiting member extending along the height direction around the sealing assembly and abutting against the outer edge of the workpiece, the part displacement caused by cutting forces can be effectively resisted during processing, thus preventing seal failure due to part displacement. This structure, working in conjunction with the sealing assembly, forms a closed and continuous sealing boundary, achieving more stable and reliable sealing performance during adsorption. Compared to traditional suction cup fixtures that rely on a large sealing edge distance to ensure sealing safety, this invention maintains a good sealing effect while significantly reducing the sealing edge distance. This not only improves material utilization but also reduces part size design requirements, thereby reducing raw material waste and lowering manufacturing costs. Attached Figure Description

[0015] Figure 1 This is one of the isometric side views of this utility model;

[0016] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0017] Figure 3 This is a top view of the sealing strip 302 of this utility model in the embedded state;

[0018] Figure 4 for Figure 1 Enlarged view of B in the middle;

[0019] Figure 5 This is the second isometric side view of the present invention;

[0020] Figure 6 for Figure 5 A magnified view of C.

[0021] The attached diagram shows the following markings and corresponding component names: base plate-10, connecting groove-101, adsorption part-20, air passage-201, air gap groove-202, sealing groove-301, sealing strip-302, limiting part-40, pickup groove-401, and support part-50. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] Example:

[0024] refer to Figure 1 The suction cup fixture for processing thin-walled parts provided in this embodiment includes a base plate 10, a sealing assembly and multiple limiting members 40. The base plate 10 serves as the basic structure of the entire fixture and can be made of aluminum alloy. The suction part 20 is provided on the base plate 10 to stably fix the workpiece to be processed on its surface by negative pressure suction. In this embodiment, the suction part 20 can be integrally formed with the base plate 10.

[0025] A sealing assembly is arranged along the outer periphery of the adsorption section 20. This sealing assembly forms a closed continuous boundary structure around the adsorption section 20, ensuring that a stable negative pressure environment can be established during the adsorption process.

[0026] Multiple limiting members 40 are disposed around the sealing assembly and extend along its height direction. The height of the limiting members 40 is higher than the height of the sealing assembly. In this embodiment, the limiting members 40 can be a block structure with a certain thickness. The limiting members 40 are used to abut against the outer edge of the workpiece in the adsorption state to realize the auxiliary positioning function and resist the part displacement caused by the cutting force during the processing to prevent the seal from failing.

[0027] After the workpiece is adsorbed and fixed by the adsorption part 20, the limiting member 40 is in close contact with its outer edge. At this time, the distance between the limiting member 40 and the side of the sealing assembly near the adsorption part 20 is defined as the sealing edge distance, which is used to limit the minimum reserved edge width required for the workpiece.

[0028] In this embodiment, through the synergistic effect of the limiting member 40 and the sealing component, the sealing edge distance can be significantly reduced (e.g., controlled within the range of 8 to 15 mm) while ensuring good sealing performance. Compared with the reserved edge distance of 20 to 30 mm in the traditional structure, this effectively improves material utilization and reduces manufacturing costs.

[0029] refer to Figures 2-3 In some embodiments, the sealing assembly includes a sealing groove 301 formed on the base plate 10 and a sealing strip 302 embedded in the sealing groove 301. The sealing groove 301 extends along the outer periphery of the adsorption part 20 and preferably forms a closed ring structure around the adsorption part 20 to construct a complete sealing area. The sealing strip 302 is embedded in the sealing groove 301 and is continuously arranged along the extension direction of the sealing groove 301 to ensure a uniform and reliable sealing effect throughout the sealing area.

[0030] In specific implementation, the sealing strip 302 is made of a material with excellent elasticity and wear resistance, such as flexible materials like rubber or silicone, to ensure that it can form a good fit and seal with the surface of the workpiece.

[0031] Furthermore, to ensure that the sealing strip 302 can fully contact the workpiece during the adsorption process, the height of the sealing strip 302 should be consistent with the adsorption surface of the adsorption part 20. In this way, when the workpiece is fixed by the adsorption part 20 through negative pressure adsorption, its lower surface can be tightly attached to both the adsorption part 20 and the sealing strip 302, thereby forming an effective sealing interface between the two, preventing vacuum leakage and improving the overall adsorption stability.

[0032] It should be noted that one side boundary of the sealing groove 301 is formed by the outer edge of the adsorption part 20, and the sealing strip 302 is in close contact with the surface of the adsorption part 20. The other side boundary of the sealing groove 301 is formed by the inner edge of the limiting member 40, and the sealing strip 302 is in close contact with the corresponding part of the limiting member 40. Through this structural design, the sealing strip 302 can form a stable contact interface with the adsorption part 20 and the limiting member 40 respectively during the adsorption process, thereby effectively improving the overall sealing performance.

[0033] This structural form, in which the outer edge of the adsorption part 20 and the inner edge of the limiting member 40 jointly define the boundary of the sealing groove 301, not only simplifies the overall structure of the tooling, but also helps to further reduce the sealing edge distance, so that the workpiece to be processed can have a smaller reserved edge width while meeting the sealing requirements, thereby improving the material utilization rate.

[0034] In practical implementation, the depth of the sealing groove 301 can be matched with the height of the sealing strip 302. This design can prevent the cutting force on the workpiece during processing from being directly transmitted to the sealing strip 302, prevent the sealing strip 302 from deforming, and thus maintain a good sealing effect between the sealing strip 302 and the workpiece.

[0035] In some embodiments, the adsorption part 20 is provided with a plurality of air channels 201 for connecting a vacuum generator and realizing negative pressure suction of the sealed area. Specifically, the plurality of air channels 201 can be distributed on the surface of the adsorption part 20 and can selectively communicate with the sealing groove 301. When a certain air channel 201 is connected to the sealing groove 301, the air channel 201 can be connected to the vacuum generator through an external pipeline. Specifically, a connecting groove 101 can be opened in the middle of the base plate 10. The connecting groove 101 is used to connect the pipeline of the vacuum generator. Through the air channel 201, the vacuum generator can extract the air in the sealing groove 301 and form a negative pressure environment inside the sealing groove 301.

[0036] Furthermore, the arrangement of the multiple air passages 201 can be adjusted according to actual processing requirements. For example, they can be evenly distributed along the circumference of the adsorption section 20 or arranged asymmetrically according to the shape of the part to ensure that the pressure distribution in the sealing groove 301 is uniform and improve the overall sealing effect.

[0037] Under negative pressure, the sealing strip 302 fits tightly against the surface of the adsorption part 20 and the inner edge of the limiting member 40, thereby forming a stable and reliable sealing interface between the workpiece and the tooling. This structure not only enhances adsorption stability but also effectively prevents seal failure caused by cutting forces, improving clamping reliability.

[0038] refer to Figure 4In some embodiments, the adsorption part 20 is provided with a clearance groove 202, which is used to cooperate with the holes on the workpiece. The clearance groove 202 is a closed structure, and the clearance groove 202 separates a portion of the plurality of air passages 201, so that the air passages 201 cannot remain continuous on their path through the clearance groove 202.

[0039] In some embodiments, the adsorption part 20 is provided with a clearance groove 202, which is used to correspond to the position of the hole on the workpiece to be processed, so as to achieve reliable adsorption and positioning of the part with the hole structure.

[0040] The anti-cavity groove 202 is a closed structure, preferably an annular or quasi-annular groove. Its shape and size can be adapted to the actual contour of the hole on the workpiece. The main function of the anti-cavity groove 202 is to avoid sealing failure or uneven adsorption force caused by the vacuum pressure acting on the hole area of ​​the workpiece during the adsorption process.

[0041] Furthermore, the venting groove 202 separates a portion of the multiple air passages 201, so that these air passages 201 no longer remain continuous on the path passing through the venting groove 202. In other words, in the area where the venting groove 202 is located, the air passages 201 are disconnected or detoured, thereby preventing vacuum pressure from leaking through this area and ensuring the stability and sealing of the adsorption system.

[0042] refer to Figure 5 In some embodiments, the limiting member 40 is provided with a pickup groove 401, which extends along the depth direction of the limiting member 40 and penetrates part or all of its height, making it convenient for operating tools or fingers to be inserted.

[0043] The pickup groove 401 is deliberately positioned to avoid the area directly opposite the sealing strip 302, so as to prevent the sealing strip 302 from being affected by the cutting force generated by the workpiece during processing, thereby avoiding deformation of the sealing strip 302 at the sealing groove 301.

[0044] Specifically, the position of the pickup groove 401 should be such that its opening is outside the sealing strip 302 and will not directly contact or overlap with the sealing strip 302. In this way, even if the workpiece is subjected to a large cutting force during the processing, it will not be transmitted to the sealing strip 302 through the pickup groove 401, thereby ensuring the integrity and sealing effect of the sealing strip 302.

[0045] In some embodiments, a support portion 50 is provided on the base plate 10, and there is a certain height difference between the support portion 50 and the adsorption portion 20. Specifically, the top surface of the support portion 50 is higher or lower than the working surface of the adsorption portion 20, and the design is based on the specific structural requirements of the part to be processed.

[0046] The main function of the support part 50 is to adapt to the processing requirements of thin-walled parts with stepped structures. When the workpiece is a stepped part, different areas have different thicknesses or heights. By setting the support part 50 with a height difference on the base plate 10, effective support can be provided for different height areas of the workpiece while adsorbing and fixing it, thereby ensuring the stability and positioning accuracy of the workpiece during the processing.

[0047] In some embodiments, a plurality of air passages 201 are uniformly distributed along the surface of the adsorption portion 20, and the spacing between adjacent air passages 201 is controlled within the range of 10 to 20 mm.

[0048] This design aims to ensure that a uniform pressure field is formed in all areas of the adsorption section 20 during vacuum adsorption, thereby improving the overall adsorption stability and clamping reliability for thin-walled parts. By setting the air channels 201 in a uniform distribution and reasonably controlling their spacing, problems such as uneven adsorption or sealing failure caused by local pressure differences can be effectively avoided.

[0049] Furthermore, a spacing of 10–20 mm between the air channels 201 ensures adsorption efficiency while also taking into account the structural strength of the tooling and the feasibility of the manufacturing process. If the spacing between the air channels 201 is too small, it may affect the structural integrity of the adsorption section 20 and increase the processing difficulty; if the spacing is too large, it may lead to uneven pressure distribution in the adsorption area and reduce the sealing performance.

[0050] Therefore, this air passage 201 arrangement is particularly suitable for processing thin-walled parts where high adsorption uniformity is required, which helps to improve the adaptability and effectiveness of the tooling.

[0051] Working principle:

[0052] When clamping thin-walled parts to be processed, the workpiece is first placed on the surface of the suction part 20 of the suction cup fixture, with its outer edge abutting against the limiting member 40. Subsequently, the air passage 201 inside the suction part 20 is evacuated by a vacuum generator to create a negative pressure environment between the suction part 20 and the workpiece, thereby achieving stable adsorption and fixation of the part.

[0053] Meanwhile, the sealing component plays a key role in the adsorption process. The sealing strip 302 embedded in the sealing groove 301 is in close contact with the adsorption part 20 and the limiting member 40 respectively. After the workpiece is adsorbed, its lower surface is also in close contact with the sealing strip 302, thereby creating a closed sealing boundary around the adsorption area to prevent vacuum leakage and ensure the stability and reliability of the adsorption process.

[0054] The limiting component 40 is not only used to limit the installation position of the workpiece to be processed, but also to resist the displacement of the part caused by the cutting force during the processing, prevent the part from shifting and causing the seal to fail, thereby improving the stability of the overall clamping system.

[0055] In addition, by rationally designing the distance between the limiting component 40 and the sealing component (i.e., the "sealing edge distance"), the reserved edge width can be significantly reduced while ensuring good sealing performance. Compared with the reserved edge distance in the traditional structure, this greatly improves material utilization and reduces manufacturing costs.

[0056] In summary, this utility model achieves efficient and stable adsorption of thin-walled parts through the synergistic effect of the adsorption part 20, the sealing component and the limiting component 40, solving the problems of unstable clamping and material waste in the prior art, and is particularly suitable for small-batch, high-precision processing scenarios.

[0057] The various illustrative embodiments mentioned in this specification refer to specific structures described in connection with those embodiments that are included in at least one embodiment of the general description in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a structure is described in connection with any embodiment, it is intended that implementing such a structure in conjunction with other embodiments falls within the scope of this utility model.

Claims

1. A suction cup fixture for machining thin-walled parts, characterized in that, include: The base plate is equipped with an adsorption section for fixing the workpiece to be processed by negative pressure adsorption. A sealing assembly is arranged around the periphery of the adsorption section to form a closed and continuous boundary structure to achieve a sealing function during the adsorption process. Multiple limiting members are disposed around the sealing assembly and extend along its height direction to abut against the outer edge of the workpiece to be processed; wherein, When the workpiece is fixed by the adsorption part, the limiting member abuts against the outer edge of the workpiece. At this time, the distance between the limiting member and the side of the sealing assembly near the adsorption part is defined as the sealing edge distance of the workpiece. This sealing edge distance is used to limit the minimum reserved edge width required by the workpiece.

2. The suction cup fixture for machining thin-walled parts according to claim 1, characterized in that, The sealing assembly includes: A sealing groove is formed on the base plate and extends along the outer periphery of the adsorption part; A sealing strip is embedded in the sealing groove and arranged along its extension direction; One side boundary of the sealing groove is formed by the outer edge of the adsorption part, and the sealing strip is in contact with the adsorption part; The other side boundary of the sealing groove is formed by the inner edge of the limiting member, and the sealing strip is in contact with the limiting member.

3. The suction cup fixture for machining thin-walled parts according to claim 2, characterized in that, The adsorption section has multiple air channels, each of which can be selectively connected to the sealing groove. When any air channel is connected to the sealing groove, the air channel is connected to the vacuum generator. The multiple air passages are configured to draw air from the sealing groove using a vacuum generator, thereby creating a negative pressure environment within the sealing groove so that the sealing strip fits tightly against the adsorption part and the limiting member, respectively.

4. The suction cup fixture for machining thin-walled parts according to claim 3, characterized in that, The adsorption section is provided with a clearance groove, which is used to cooperate with the holes on the workpiece. The clearance groove is a closed structure, which separates a portion of the multiple air passages, so that the air passages cannot remain continuous on their path through the clearance groove.

5. The suction cup fixture for machining thin-walled parts according to claim 4, characterized in that, The limiting member has a pickup groove, one end of which extends to one side boundary of the sealing groove formed by the inner edge of the limiting member. The position of the pickup groove avoids the area directly opposite the sealing strip.

6. The suction cup fixture for machining thin-walled parts according to claim 5, characterized in that, A support portion is provided on the base plate, and there is a height difference between the support portion and the adsorption portion.

7. The suction cup fixture for machining thin-walled parts according to claim 6, characterized in that, The multiple air channels are evenly distributed on the adsorption section, and the distance between adjacent air channels is 10-20 mm.

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