Symmetrical centering positioning tool and application thereof

Abstract

The invention belongs to the technical field of positioning tools. The embodiment of the invention provides a symmetrical centering positioning tool and application thereof. The symmetrical centering and positioning tool comprises a main body frame, an upper beam and a lower beam, wherein the main body frame comprises an upper beam; the screw rod is positioned at the central position of the upper cross beam and is connected with the main body frame; the two driving blocks are symmetrically distributed at the two ends of the upper cross beam, a connecting rod is arranged between each driving block and the lead screw, and the lead screw can drive the connecting rods to move; the angle gauge is connected with the driving block and located on the side, away from the upper cross beam, of the driving block; the jack is connected with the angle gauge; the position counter is located at the end, away from the connecting rod, of the lead screw. The symmetric centering positioning tool provided by the embodiment of the invention has relatively high positioning precision and relatively strong universality.

Description

Technical Field

[0001] This application relates to the technical field of positioning tooling, and in particular to a symmetric centering positioning tooling and its application. Background Art

[0002] At present, with the rapid development of industrial manufacturing, the processing demand for complex curved surface parts has increased rapidly. Especially in industries such as aerospace, medical devices, and automotive manufacturing, strict requirements have been put forward for the processing accuracy and efficiency of such parts. For example, regarding the centering reference problem in the machining process, the prior art often uses rough blank positioning auxiliary reference features or shape template scribed lines to achieve centering and alignment, but there are problems such as poor positioning accuracy, weak operability, and weak versatility.

[0003] Therefore, there is an urgent need to provide a symmetric centering positioning tooling.

[0004] It should be noted that the above content is not necessarily the prior art and is not used to limit the patent protection scope of this application. Summary of the Invention

[0005] The embodiments of this application provide a symmetric centering positioning tooling and its application to solve or alleviate the technical problems such as poor positioning accuracy, weak operability, and weak versatility in centering reference positioning mentioned above.

[0006] The first aspect of this application provides a symmetric centering positioning tooling, including: A main body frame, the main body frame includes an upper cross beam; A lead screw, the lead screw is located at the center position of the upper cross beam and is connected to the main body frame; Two driving blocks, each driving block is symmetrically distributed at both ends of the upper cross beam, and a connecting rod is arranged between each driving block and the lead screw, and the lead screw can drive the connecting rod to move; An angle gauge, the angle gauge is connected to the driving block and is located on the side of the driving block away from the upper cross beam; A jack, the jack is connected to the angle gauge; A position counter, the position counter is located at the end of the lead screw away from the connecting rod.

[0007] The symmetric centering positioning tooling of the embodiment of the present application has good positioning accuracy and versatility, that is: it can adapt to the shape changes of single-curved surface symmetric products, so as to solve the problems of low positioning accuracy, long cycle, and low versatility in the tooling for centering the processing bedplate. Specifically, by applying a position counter in the tooling to mark data, and simplifying the centering and making the judgment result quantitative during the process of the quick locking structure, the operation efficiency of selecting the processing reference is improved; the screw drive of the equidistant connecting rod and the angle gauge enable the symmetric centering positioning tooling to adapt to different product shape changes, which plays an important role in enhancing the versatility of the tooling. The integrated angle gauge and jack form a V-shaped inclined plane, and the displacement of the driving block is decomposed on the V-shaped inclined plane, thereby driving the jack installed on the angle gauge to move horizontally and / or vertically. The position counter installed on the screw rod and the angle gauge scale on the driving block can provide effective data support for the centering positioning accuracy of different single-curved surface symmetric products.

[0008] According to an embodiment of the present application, the symmetric centering positioning tooling further includes: a handwheel, the handwheel is connected to the screw rod for driving the screw rod to reciprocate on the gravity path.

[0009] According to an embodiment of the present application, the symmetric centering positioning tooling further includes: a connecting seat, the connecting seat is used to connect two connecting rods; a pressing plate, the pressing plate is arranged on one side of the connecting seat close to the upper crossbeam.

[0010] According to an embodiment of the present application, the screw rod is a threaded screw rod, and a screw nut and a bearing adapted to the screw rod are arranged on the upper crossbeam.

[0011] According to an embodiment of the present application, the symmetric centering positioning tooling further includes: a stop block, the stop block is arranged between the bearing and the pressing plate; a cushion block, the cushion block is arranged between the stop block and the pressing plate.

[0012] According to an embodiment of the present application, the main frame further includes side beams symmetrically arranged on both sides of the upper crossbeam; locking screws are arranged on the side beams, and screw holes adapted to the locking screws are arranged on the driving block.

[0013] According to an embodiment of the present application, the driving block is slidably connected to the upper crossbeam, and the sliding connection is realized by a guide rail and a slider arranged on the guide rail. The guide rail is arranged on the upper crossbeam, and the slider is connected to the driving block.

[0014] According to an embodiment of the present application, the symmetric centering positioning tooling further includes: a positioning pin, the positioning pin is located on the side of the side beam away from the upper crossbeam, and the positioning pin is used to provide a positioning reference.

[0015] According to an embodiment of the present application, the symmetric centering and positioning tooling further includes: an elastic cushion block, which is arranged on the side of the jack away from the driving block.

[0016] In a second aspect of the embodiments of the present application, there is provided an application of the symmetric centering and positioning tooling in the first aspect, and this application includes centering and positioning for products with curved surface shapes. Description of the Drawings

[0017] In the drawings, unless otherwise specified, the same reference numerals throughout the several drawings denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed according to the present application and should not be regarded as limiting the scope of the present application.

[0018] Figure 1 is a schematic structural diagram of the symmetric centering and positioning tooling provided by some embodiments of the present application; Figure 2 is an assembly schematic diagram of the lead screw and the lead screw nut on the upper cross beam provided by some embodiments of the present application; Figure 3 is a position placement schematic diagram between the positioning and adsorption structure and the product to be processed provided by some embodiments of the present application; Figure 4 is a position structure diagram of the symmetric centering and positioning tooling for centering and positioning provided by some embodiments of the present application.

[0019] Description of the Reference Numerals: 1: Main body frame; 100: Upper cross beam; 101: Side beam; 2: Lead screw; 3: Driving block; 4: Link; 5: Angle gauge; 6: Jack; 7: Position counter; 8: Handwheel; 9: Connecting seat; 10: Pressure plate; 11: Lead screw nut; 12: Bearing; 13: Stopper; 14: Cushion block; 15: Locking screw; 16: Guide rail; 17: Slide block; 18: Positioning pin; 19: Elastic cushion block; 20: Positioning and adsorption structure; 21: Product. Detailed Embodiments

[0020] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings. In the drawings, for clarity, the dimensions of layers, regions, and elements, as well as their relative dimensions, may be exaggerated. Wherever the same or similar reference numerals are used throughout, they denote the same or similar elements or elements having the same or similar functions. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as limiting the present application. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0021] It should be understood that when an element or layer is referred to as "on", "adjacent to", "connected to", or "coupled to" another element or layer, it can be directly on, adjacent to, connected, or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as "directly on", "directly adjacent to", "directly connected to", or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Thus, without departing from the teachings of the present application, the first element, component, region, layer, or part discussed below may be referred to as the second element, component, region, layer, or part. And when discussing the second element, component, region, layer, or part, it does not indicate that there must be a first element, component, region, layer, or part in the present application.

[0022] In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that these terms can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented, for example, in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0024] In this application, when it comes to numerical intervals (i.e., numerical ranges), unless otherwise specified, the distribution of the selectable numerical values within the numerical interval is considered continuous, and includes the two numerical endpoints (i.e., the minimum value and the maximum value) of the numerical interval, as well as each numerical value between these two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to the integers within the numerical interval, it includes the two endpoint integers of the numerical range, as well as each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all sub-ranges subsumed therein. The "numerical values" in the numerical interval can be any quantitative values, such as numbers, percentages, ratios, etc. The "numerical interval" is allowed to broadly include quantitative intervals such as percentage intervals, ratio intervals, and ratio value intervals.

[0025] Regarding the centering reference problem of the medical bed board during the machining process, the prior art often uses rough blank positioning auxiliary reference features or profile template scribed lines to achieve centering and alignment, but there are problems in positioning accuracy, operability, and versatility; the specific situations are as follows: Centering with auxiliary features: Due to the influence of thermal expansion during forming on the relative position accuracy of the positioning reference, a relatively large positioning gap needs to be designed; this increases the positioning error of the tooling; the paving operation process of the auxiliary positioning reference feature during the rough blank forming is complex and time-consuming; different products involve multiple types of molds and processing toolings; unifying the reference requires a relatively large comprehensive cost, and thus the achievable general range is relatively narrow; Centering with scribed lines: There are human perceptual judgments and scribing errors during the centering process of the machining reference, resulting in difficulty in controlling the cumulative machining centering error; in order to avoid the risk of centering errors in the sub-machining reference, the process of multiple verification and calibration takes a long time; the scribing template cannot follow the changes in the product profile and has poor versatility.

[0026] Accordingly, in the first aspect of this application, a symmetric centering positioning tooling is provided. Refer to Figure 1 , this tooling includes: a main frame 1, the main frame 1 includes an upper cross beam 100; a lead screw 2, the lead screw is located at the center position of the upper cross beam 100 and is connected to the main frame 1; two driving blocks 3, each of the driving blocks is symmetrically distributed at both ends of the upper cross beam, and a connecting rod 4 is provided between each driving block 3 and the lead screw 2, and the lead screw 2 can drive the connecting rod 4 to move; an angle gauge 5, the angle gauge 5 is connected to the driving block 3 and is located on the side of the driving block 3 away from the upper cross beam 100; a jack 6, the jack 6 is connected to the angle gauge 5; a position counter 7, the position counter 7 is located at the end of the lead screw 2 away from the connecting rod 4.

[0027] The symmetric centering and positioning tooling of the embodiments of the present application has good positioning accuracy and versatility, that is, it can adapt to the shape changes of single-curved surface symmetric products, so as to solve the problems of low positioning accuracy, long cycle, and low versatility in the centering of the processing bedplate. Specifically, by applying a position counter in the tooling to mark data, and simplifying the centering and quantifying the determination result during the process of the quick locking structure, the operation efficiency of the processing reference selection is improved; the equal-distance connecting rod driven by the lead screw and the angle gauge make the centering and positioning tooling adapt to different product shape changes, which plays an important role in enhancing the versatility of the tooling. The integrated angle gauge and jack form a V-shaped inclined plane, and the driving block displacement is decomposed on the V-shaped inclined plane, thereby driving the jack installed on the angle gauge to move horizontally and / or vertically. The position counter installed on the lead screw and the angle gauge scale on the driving block can provide effective data support for the centering and positioning accuracy of different single-curved surface symmetric products.

[0028] In some embodiments, the symmetric centering and positioning tooling further includes a handwheel 8, and the handwheel 8 is connected to the lead screw 2 for driving the lead screw to reciprocate on the gravity path. Specifically, the handwheel and the lead screw are connected by installing a setscrew on the basis of the shaft hole fit.

[0029] In some embodiments, the symmetric centering and positioning tooling further includes a connecting seat 9, and the connecting seat 9 is used to connect two connecting rods 4. In this way, under the action of the lead screw, the two connecting rods can move with the same displacement. That is, under the condition of applying a force to the lead screw, the equidistant lateral movement of the driving block relative to the symmetric center of the main frame is realized.

[0030] In some embodiments, the symmetric centering and positioning tooling further includes a pressing plate 10, and the pressing plate 10 is arranged on one side of the connecting seat 9 close to the upper cross beam 100. The pressing plate can realize the connection between the lead screw and the connecting seat by pressing the end face of the bearing 12.

[0031] In some embodiments, referring to Figure 2 , the lead screw is a threaded lead screw, and a lead screw nut 11 and a bearing 12 adapted to the lead screw are arranged on the upper cross beam 100. In this way, under the action of the handwheel, the lead screw can move relative to the matching lead screw thread.

[0032] In some embodiments, the symmetric centering tooling further includes a stop block 13 and a cushion block 14. The stop block is arranged between the bearing and the pressing plate; the cushion block is arranged between the stop block and the pressing plate.

[0033] Furthermore, the cushion block is a cylindrical cushion block.

[0034] In some embodiments, the main body frame further includes side beams 101 symmetrically arranged on both sides of the upper cross beam; locking screws 15 are arranged on the side beams 101, and screw holes adapted to the locking screws are arranged on the driving block 3. In this way, the adjusted symmetric centering tooling can be fixed and positioned.

[0035] Further, a reverse-thread nut is installed on the inner side surface of the side beam 101 opposite to the driving block 3 in cooperation with the locking screw 15.

[0036] In some embodiments, the driving block 3 is slidably connected to the upper cross beam 100, and the sliding connection is realized by a guide rail 16 and a slider 17 arranged on the guide rail. The guide rail 16 is arranged on the upper cross beam 100, and the slider 17 is connected to the driving block 3. In this way, the driving block can move symmetrically to both sides equidistantly with respect to the symmetry center of the main body frame, enhancing the function of the driving block to adapt to changes in the angle and height dimensions of the product.

[0037] In some embodiments, a positioning pin 18 is further included. The positioning pin is located on the side of the side beam away from the upper cross beam, and the positioning pin is used to provide a positioning reference. The positioning pins symmetrically arranged with respect to the center of the screw nut can perform rough positioning on the single-curved surface symmetric product, that is, provide a positioning reference for the single-curved surface symmetric product.

[0038] In some embodiments, the symmetric centering and positioning tooling further includes: an elastic cushion block 19. The elastic cushion block is arranged on the side of the jack away from the driving block. When using this tooling to position the single-curved surface symmetric product, the driving block drives the jack installed on the angle gauge to move horizontally and / or vertically, so that the elastic cushion block installed on the jack is compressed to provide a clamping force for the single-curved surface symmetric product and provide a reference for the centering deviation.

[0039] Further, the elastic cushion block is a polyurethane cushion block.

[0040] It can be understood that the elastic compression amount of the elastic cushion block can be adjusted according to actual needs.

[0041] In some embodiments, the jack includes an oil cylinder or a cylinder.

[0042] In the second aspect of the embodiments of the present application, an application of the symmetric centering and positioning tooling in the first aspect is provided, and the application includes centering and positioning for products with a curved surface shape.

[0043] In some embodiments, the product with a curved surface shape includes a single-curved surface symmetric product.

[0044] Further, refer to Figure 3 and Figure 4, the centering and positioning of a single-curved surface symmetric product using the symmetric centering and positioning tooling of the first aspect includes the following steps: S1: Adjust the angle of the angle gauge 5. Adjust the angle gauge 5 so that the pressing head planes of the left and right jacks 6 are respectively parallel to the two-sided design basic reference planes of the product, and accurately record the corresponding scale positions of the angle gauge for the quick reset reference of the symmetric centering and positioning tooling.

[0045] S2: Rotate the handwheel 8 to move the lead screw 2 upward to the mechanical limit point so that the cylindrical spacer block (spacer block 14) is in close contact with the upper cross beam 100 of the main frame, and then clear the position counter 7.

[0046] S3: Clamp the product to be machined 21 (such as a single-curved surface symmetric product) and the positioning and adsorption structure 20, where the relative positions of the positioning and adsorption structure and the product are as Figure 3 shown. The positioning and adsorption structure 20 is installed on the machine tool, and the product is placed on the positioning and adsorption structure 20 so that the arc surface of the product 21 fits the conforming adsorption structure and is roughly centered.

[0047] S4: Install the symmetric centering and positioning tooling on the positioning and adsorption structure 20, and use the positioning pin 18 to achieve quick fixing and locking.

[0048] S5: Rotate the handwheel 8 to drive the lead screw 2 to move, and drive the pressing heads of the two-sided jacks 6 to move synchronously through the connecting rod 4 until they are close to the product surface. It can be understood that when the compression amounts on both sides are inconsistent, the position of the product can be manually adjusted; when the requirement that the compression amount of the elastic spacer block 19 is uniform and less than 0.5 mm is met, stop rotating the lead screw or adjust the stroke of the jack, that is, the relative centering position of the product with respect to the tooling is adjusted in place; at the same time, record the value displayed by the position counter for the quick reset of the tooling.

[0049] S6: Adsorb and clamp the product. Activate the adsorption function of the vacuum positioning and adsorption structure 20 to make the arc surface of the product fit tightly against the surface of the tooling without gaps.

[0050] S7: Remove the centering main frame; remove the quick locking pin of the positioning tooling to complete the centering and positioning work. Then the machining program can be started for machining, such as performing the product machining program after centering the reference to perform tasks such as trimming and drilling of the product.

[0051] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. The orientation terms "inner" and "outer" refer to the inside and outside relative to the contour of each component itself. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "on top of other devices or structures" will be positioned as "below other devices or structures" or "beneath other devices or structures" afterwards. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations should be made for the relative spatial descriptions used herein.

[0052] It should also be noted that the "some embodiments", "other embodiments", "embodiments", etc. mentioned in the present application refer to the specific features, structures or characteristics described in connection with these embodiments being included in at least one embodiment described in the general description of the present application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that the implementation of such feature, structure or characteristic in combination with other embodiments also falls within the scope of the present application.

[0053] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0054] It should also be noted that the above are only the preferred embodiments of the present application, and do not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A symmetric centering and positioning tooling, characterized in that Comprising: A main body frame, the main body frame including an upper cross beam; A lead screw, the lead screw being located at the central position of the upper cross beam and connected to the main body frame; Two driving blocks, each of the driving blocks being symmetrically distributed at both ends of the upper cross beam, a connecting rod being provided between each driving block and the lead screw, and the lead screw being capable of driving the connecting rod to move; An angle gauge, the angle gauge being connected to the driving block and located on the side of the driving block away from the upper cross beam; A jack, the jack being connected to the angle gauge; A position counter, the position counter being located at the end of the lead screw away from the connecting rod.

2. The symmetric centering and positioning tooling according to claim 1, characterized in that, Further comprising: A hand wheel, the hand wheel being connected to the lead screw for driving the lead screw to reciprocate along the gravity path.

3. The symmetric centering and positioning tooling according to claim 1, characterized in that Further comprising: A connecting seat, the connecting seat being used for connecting two connecting rods; A pressing plate, the pressing plate being arranged on the side of the connecting seat close to the upper cross beam.

4. The symmetric centering and positioning tooling according to claim 3, characterized in that The lead screw is a threaded lead screw, and a lead screw nut and a bearing adapted to the lead screw are arranged on the upper cross beam.

5. The symmetric centering and positioning tooling according to claim 4, characterized in that, Further comprising: A stop block, the stop block being arranged between the bearing and the pressing plate; A spacer block, the spacer block being arranged between the stop block and the pressing plate.

6. The symmetric centering and positioning tooling according to claim 1, wherein The main body frame further includes side beams symmetrically arranged on both sides of the upper cross beam; Locking screws are arranged on the side beams, and screw holes adapted to the locking screws are arranged on the driving blocks.

7. The symmetric centering positioning tooling according to claim 1, characterized in that The driving block is slidably connected to the upper cross beam, and the sliding connection is realized by a guide rail and a slider arranged on the guide rail. The guide rail is arranged on the upper cross beam, and the slider is connected to the driving block.

8. The symmetric centering and positioning tooling according to claim 6, wherein Further comprising: A positioning pin, the positioning pin being located on the side of the side beam away from the upper cross beam, and the positioning pin being used for providing a positioning reference.

9. The symmetric centering and positioning tooling according to any one of claims 1-8, characterized in that, Further comprising: An elastic spacer block, the elastic spacer block being arranged on the side of the jack away from the driving block.

10. Use of the symmetric centering and positioning tooling according to any one of claims 1-9, characterized in that Including centering positioning for products with a curved surface shape.

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