Three-coordinate measuring clamp for engine part

Abstract

The utility model relates to the technical field of engine component measurement, and provides an engine component three-coordinate measuring clamp, which comprises a bottom plate, two positioning pin holes are arranged on the bottom plate, the positioning pin holes are locked by a ball lock mechanism to realize the connection with a three-coordinate measuring machine, and the two positioning pin holes are respectively arranged at the positions of a first side and a second side which are opposite to each other; the limiting rod is arranged at the middle position of the third edge connected with the first edge and the second edge; the first supporting rod and the second supporting rod are arranged on the fourth side opposite to the third side and located at the included angle position of the first side and the fourth side and the included angle position of the second side and the fourth side respectively; the first positioning block is arranged on the first supporting rod; and the second positioning block is arranged on the second supporting rod. According to the technical scheme of the utility model, the requirement of clamping the workpiece in a matching manner can be met, 'one-placing 'three-coordinate measuring and positioning can be realized, and moreover, quick switching can be realized, and the measuring efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine component measurement, in particular to a three-coordinate measurement fixture for engine components. Background Art

[0002] Engine quality inspection is generally carried out using a three-coordinate measuring machine. In the past, before each measurement, it was necessary to manually move the workpiece, manually move the probe for alignment, and then fine-tune the part to align it as closely as possible with the xyz axis of the three-coordinate measuring machine. Only then could the coordinate system be established after marking the reference point, and then the items specified in the process could be measured to ensure that the measurement results were as close to the true value as possible.

[0003] During the process from project development to mass production, the inspection frequency in the sample and small batch stage is often required to be full inspection, including the collection of process capability data before mass production and the first and last piece inspection in mass production. The efficiency of manual alignment inspection is difficult to meet the inspection frequency. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0005] To this end, one purpose of the utility model is to provide a three-coordinate measurement fixture for engine components, which has a simple structure, is easy to process, is light in weight, can meet the clamping requirements of the workpiece, realizes "one-stop" three-coordinate measurement and positioning, and can be switched quickly to improve measurement efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a three-coordinate measurement fixture for engine components, including: a base plate, two positioning pin holes are arranged on the base plate, so as to lock the positioning pin holes through a ball lock mechanism to achieve association with a three-coordinate measuring machine, and the two positioning pin holes are respectively located at the relative first side and second side positions; a limit rod is arranged at the middle position of the third side connecting the first side and the second side; a first support rod and a second support rod are arranged at the fourth side position opposite to the third side, and are respectively located at the angle position between the first side and the fourth side, and at the angle position between the second side and the fourth side; a first positioning block is arranged on the first support rod; and a second positioning block is arranged on the second support rod.

[0007] Preferably, a first U-shaped groove and a second U-shaped groove are milled on the bottom plate, and the first support rod and the second support rod are respectively inserted into the first U-shaped groove and the second U-shaped groove to be connected to the bottom plate and can move slightly on the bottom plate.

[0008] Preferably, the first U-shaped groove is parallel to the fourth side, and the second U-shaped groove is parallel to the second side.

[0009] Preferably, the top of the limiting rod is L-shaped, and the L-shaped opening faces inward;

[0010] The first positioning block and the second positioning block are respectively milled with contoured openings, and the contoured openings face inwards.

[0011] Preferably, threaded holes are processed at the top ends of the first support rod and the second support rod, and the first positioning block and the second positioning block are connected by being screwed into the threaded holes of the first support rod and the second support rod respectively by bolts, and the screwing height can be finely adjusted.

[0012] The three-coordinate measuring fixture for engine parts proposed by the utility model has the following beneficial technical effects:

[0013] (1) The three-coordinate measuring fixture for engine parts proposed by the utility model has a simple structure, is easy to process, and is light in weight. It can use the deadweight and external structure of the cylinder body to achieve clamping. At the same time, the connection between the fixture and the measuring machine is achieved by a bidirectional positioning pin hole, and the establishment of the measurement reference is simple and reliable.

[0014] (2) The three-coordinate measuring fixture for engine components proposed in the utility model can realize rapid positioning and has high measurement stability. It does not require additional clamping and can realize rapid switching and measurement, thus saving manpower, reducing workload, improving detection efficiency, and shortening processing cycle.

[0015] (3) The three-coordinate measuring fixture for engine parts proposed by the utility model has both support and XYZ three-directional limiting functions, and the first support rod and the second support rod can be fine-tuned on the base plate and can be fixed after being matched with the workpiece. The first positioning block and the second positioning block can achieve height fine-tuning and Z-direction leveling through bolts.

[0016] (4) The contoured openings of the first positioning block and the second positioning block in the three-coordinate measurement fixture for engine components proposed by the utility model and the L-shaped opening on the top of the limit rod limit the degrees of freedom in all directions, thereby achieving workpiece clamping and saving an additional clamping process. No subsequent adjustment is required, thus achieving one-time installation and measurement.

[0017] Additional aspects and advantages of the present invention will be given in the following description, and some will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 A schematic structural diagram of a three-coordinate measuring fixture for engine components according to the utility model is shown;

[0020] Figure 2Shows Figure 1 The main structural diagram of the three-coordinate measurement fixture for engine parts;

[0021] Figure 3 Shows Figure 1 A top view of the three-coordinate measurement fixture for engine parts;

[0022] Figure 4 Shows Figure 1 A schematic diagram of the structure of the base plate of the three-coordinate measurement fixture for engine parts;

[0023] Figure 5 The schematic diagram of the structure of the three-coordinate measurement fixture of the engine parts after the workpiece is placed.

[0024] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the components is as follows:

[0025] 102 bottom plate, 1021 positioning pin hole, 1022 first side, 1023 second side, 1024 third side, 1025 fourth side, 1026 first U-shaped groove, 1027 second U-shaped groove, 104 limiting rod, 1042 L-shaped opening, 106 first support rod, 108 second support rod, 110 first positioning block, 1101 contoured opening I, 112 second positioning block, 1121 contoured opening II, 114 bolt. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] Combine the following Figures 1 to 5 A three-coordinate measuring fixture for engine components according to an embodiment of the utility model is described in detail.

[0029] like Figures 1 to 5As shown, a three-coordinate measuring fixture for engine parts according to an embodiment of the utility model includes: a base plate 102, a positioning pin hole 1021, a limiting rod 104, a first support rod 106, a second support rod 108, a first limiting block, a second limiting block, etc. Two positioning pin holes 1021 are designed on the base plate 102, and the two positioning pin holes 1021 are respectively located at the relative first side 1022 and second side 1023. The positioning pin holes 1021 are locked by a ball lock mechanism, which can realize the positioning and clamping association with the three-coordinate measuring machine and establish a measurement reference. The limiting rod 104 is set at the middle position of the third side 1024 connecting the first side 1022 and the second side 1023, which can support the workpiece and limit it in the Y direction at the same time. The first support rod 106 and the second support rod 108 are arranged at the fourth side 1025 opposite to the third side 1024, and are respectively located at the angle between the first side 1022 and the fourth side 1025, and at the angle between the second side 1023 and the fourth side 1025; the first positioning block 110 is arranged on the first support rod 106; the second positioning block 112 is arranged on the second support rod 108, which can realize the support of the workpiece and the limitation in the X and Z directions.

[0030] Furthermore, if Figure 4 As shown, the bottom plate 102 is milled with a first U-shaped groove 1026 and a second U-shaped groove 1027, and the first support rod 106 and the second support rod 108 are respectively inserted into the first U-shaped groove 1026 and the second U-shaped groove 1027 to connect with the bottom plate 102 and can move slightly on the bottom plate 102. The first support rod 106 can slide and adjust the displacement in the first U-shaped groove 1026, and the second support rod 108 can slide and adjust the displacement in the second U-shaped groove 1027, and by moving slightly on the bottom plate 102, it is ensured that the workpiece is fixed after being matched.

[0031] Furthermore, if Figure 4 As shown, the first U-shaped groove 1026 is parallel to the fourth side 1025, and the second U-shaped groove 1027 is parallel to the second side 1023. Thus, the X-direction and Y-direction fine adjustment on the bottom plate 102 can be achieved, and the adjustment range is wide, which further ensures the fixation after the fit with the workpiece.

[0032] Furthermore, if Figure 1 As shown, the top of the limit rod 104 is L-shaped, and the L-shaped opening 1042 faces inward; the first positioning block 110 is milled with a contoured opening I1101, and the contoured opening I1101 faces inward, and the second positioning block 112 is milled with a contoured opening II1121, and the contoured opening II1121 faces inward. Thus, the degree of freedom in each direction is limited by cooperation, the workpiece is clamped, and the additional clamping process is saved. No subsequent adjustment is required, and one-time installation measurement is achieved.

[0033] Furthermore, if Figure 1and Figure 2 As shown, the top ends of the first support rod 106 and the second support rod 108 are processed with threaded holes, and the first positioning block 110 and the second positioning block 112 are respectively screwed into the threaded holes of the first support rod 106 and the second support rod 108 by bolts 114 for connection, and the screwing height can be fine-tuned. Thus, Z-axis leveling is achieved, measurement stability is guaranteed, and no additional clamping is required, which is conducive to fast switching and measurement.

[0034] The working process of the three-coordinate measuring fixture for engine parts proposed by the utility model is as follows:

[0035] The positioning pin hole 1021 on the bottom plate 102 is locked by a ball lock mechanism to achieve positioning and clamping association with the three-dimensional coordinate measuring machine and establish a measurement benchmark;

[0036] The workpiece is placed on the limit rod 104, the first limit block and the second limit block, and the first support rod 106 and the second support rod 108 are slightly moved on the base plate 102 to ensure that they fit the workpiece and are fixed; the height of the first positioning block 110 and the second positioning block 112 are adjusted by screwing in the bolt 114 to achieve Z-axis adjustment and leveling; the contoured opening Ⅰ1101 of the first positioning block 110, the contoured opening Ⅱ1121 of the second positioning block 112 and the L-shaped opening 1042 of the limit rod 104 limit the degrees of freedom in all directions, completing the clamping and saving the additional clamping process. No subsequent adjustment is required, and one-time installation and measurement can be achieved.

[0037] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0039] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A three-coordinate measuring fixture for engine parts, characterized in that: include: A base plate, wherein two locating pin holes are arranged on the base plate, so as to lock the locating pin holes through a ball lock mechanism to realize association with a three-dimensional coordinate measuring machine, and the two locating pin holes are respectively located at the relative first side and second side positions; a limit rod is arranged at the middle position of the third side connecting the first side and the second side; a first support rod and a second support rod are arranged at the fourth side position opposite to the third side, and are respectively located at the angle position between the first side and the fourth side, and at the angle position between the second side and the fourth side; a first positioning block is arranged on the first support rod; and a second positioning block is arranged on the second support rod.

2. The three-coordinate measuring fixture for engine parts according to claim 1, characterized in that: A first U-shaped groove and a second U-shaped groove are milled on the bottom plate, and the first support rod and the second support rod are respectively inserted into the first U-shaped groove and the second U-shaped groove to be connected to the bottom plate and can be slightly moved on the bottom plate.

3. The three-coordinate measuring fixture for engine parts according to claim 2, characterized in that: The first U-shaped groove is parallel to the fourth side, and the second U-shaped groove is parallel to the second side.

4. The three-coordinate measuring fixture for engine parts according to any one of claims 1 to 3, characterized in that: The top of the limiting rod is L-shaped, and the L-shaped opening faces inward; The first positioning block and the second positioning block are respectively milled with contoured openings, and the contoured openings face inwards.

5. The three-coordinate measuring fixture for engine parts according to claim 4, characterized in that: The top ends of the first support rod and the second support rod are processed with threaded holes, and the first positioning block and the second positioning block are respectively screwed into the threaded holes of the first support rod and the second support rod by bolts for connection, and the screwing height can be finely adjusted.

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