Workpiece positioning clamp and oil receiving probe rod flange end positioning clamp

Abstract

The utility model relates to the technical field of industrial production and machining, and discloses a workpiece positioning clamp and an oil receiving probe rod flange end positioning clamp, the workpiece positioning clamp comprises a plurality of split type clamps, each split type clamp is arranged corresponding to the contour track of a workpiece, and comprehensive supporting of the workpiece is ensured. Each split clamp comprises a first positioning block and a second positioning block, the first positioning block is fixed to the workbench, the second positioning block is movably connected to the first positioning block, and the distance between the first positioning block and the second positioning block is adjustable, so that when a workpiece is clamped and positioned, the workpiece can be clamped between the first positioning block and the second positioning block; and meanwhile, by adjusting the position of the second positioning block, the clamp can adapt to workpieces of different sizes and shapes, and therefore the stability and efficiency in the machining process are remarkably improved. In addition, the split type structure of the clamp is convenient to replace and maintain quickly, and the requirements of modern machining for high efficiency and high precision are met.

Description

Technical Field

[0001] The present application relates to the technical field of industrial production and processing, and further relates to a workpiece positioning fixture and a positioning fixture for the flange end of an oil-receiving probe rod. Background Art

[0002] At present, many workpiece positioning fixtures use the traditional upper and lower positioning blocks for clamping and positioning. Although this method is simple, it has some obvious limitations in actual operation. First, due to the insufficient matching accuracy between the contact surface of the positioning block and the workpiece, inaccurate positioning often occurs, which not only affects the processing accuracy, but may also cause the matching surfaces of the workpiece to not match during the processing, thereby causing the workpiece to loosen. This requires the operator to repeatedly adjust the position of the fixture to ensure the correct positioning of the workpiece, which undoubtedly increases the complexity of the operation and processing time. At the same time, this traditional positioning method will lead to unstable positioning, and the workpiece may be displaced during the processing process, which not only affects the processing quality of the workpiece, but also may bring potential safety risks. Utility Model Content

[0003] In response to the above technical problems, the purpose of this application is to provide a workpiece positioning fixture and an oil probe flange end positioning fixture, which can provide a more accurate and stable positioning structure, reduce or eliminate workpiece loosening and processing errors caused by inaccurate positioning.

[0004] In order to achieve the above objectives, the present application provides a workpiece positioning fixture, comprising:

[0005] A plurality of split fixtures, each of the split fixtures being located on a contour trajectory of a corresponding workpiece;

[0006] Each of the split fixtures includes a first positioning block and a second positioning block. The first positioning block is arranged on the workbench, and the second positioning block is movably connected to the first positioning block. The relative distance between the second positioning block and the first positioning block is adjustable. When the workpiece positioning fixture clamps and positions the workpiece, part of the workpiece is clamped between the first positioning block and the second positioning block, thereby forming multi-point compression and fixation on the workpiece.

[0007] In some embodiments, the first positioning block has a positioning hole, the positioning hole has a preset depth and extends along the height direction of the first positioning block;

[0008] Each of the split clamps also includes a connecting piece, which is movably arranged and inserted into the positioning hole, and simultaneously connects the first positioning block and the second positioning block, so that when the workpiece is clamped and positioned, the second positioning block can be displaced along the height direction of the connecting piece.

[0009] In some embodiments, the inner periphery of the positioning hole and the outer periphery of the connecting member are provided with corresponding threaded structures, and the connecting member and the first positioning block form a threaded connection, so that when the connecting member rotates, the relative distance between the first positioning block and the second positioning block is adjusted.

[0010] In some embodiments, the connecting member is provided with a limiting convex edge at an end portion away from the first positioning block, a through hole is provided on the second positioning block, the width of the limiting convex edge is greater than the aperture of the through hole, the first positioning block is provided with a step portion, and the end of the connecting member not provided with the limiting convex edge passes through the through hole provided on the second positioning block and is threadedly connected to the first positioning block;

[0011] The connecting member can be operated to rotate, so that the limiting protrusion moves in a direction toward the first positioning block until the second positioning block is pushed to abut against the step portion.

[0012] In some embodiments, a receiving groove is provided on the first positioning block, and the receiving groove corresponds to the position of the second positioning block and is used to adapt to an extended portion or an irregular portion of a workpiece.

[0013] In some embodiments, the first positioning block is provided with an auxiliary positioning piece, and the auxiliary positioning piece and the first positioning block are detachably connected;

[0014] The auxiliary positioning member has a smooth surface, so that when the workpiece is positioned, at least a portion of the outer surface of the workpiece abuts against the surface of the auxiliary positioning member to prevent the workpiece from shifting.

[0015] In some embodiments, the workpiece positioning fixture also includes a fixture base plate and several fixing parts. The fixture base plate is arranged on the workbench, and several fixing parts are inserted into the upper surface of the fixture base plate, and the bottom of each first positioning block is inserted into the corresponding fixing part to connect the split fixture to the fixture base plate.

[0016] In some embodiments, the bottom of each split clamp is correspondingly connected to two or more fixing members to prevent the split clamp from deflecting;

[0017] And / or, the outer peripheral contour of the fixing member is non-circular, and a corresponding non-circular hole is provided on the clamp bottom plate for the fixing member to be inserted, thereby preventing the split clamp from deflecting due to the non-circular contour.

[0018] In some embodiments, a quadruple zero-point locator is provided at the bottom of the fixture base plate to maintain the horizontal position of the fixture base plate at a positioning reference plane.

[0019] On the other hand, the present application also provides an oil-receiving probe rod flange end positioning fixture, which adopts the above-mentioned workpiece positioning fixture, wherein a plurality of the split fixtures are arranged along the contour trajectory of the oil-receiving probe rod flange end or the oil-receiving probe rod flange end blank, and are used to perform multi-point pressing and fixing of the oil-receiving probe rod flange end or the oil-receiving probe rod flange end blank to assist processing.

[0020] Compared with the prior art, the workpiece positioning fixture and the oil probe flange end positioning fixture provided by this application have the following beneficial effects:

[0021] 1. The design of multiple split fixtures can better adapt to the contour trajectory of different workpieces, making the fixture more adaptable and flexible, which is conducive to achieving precise positioning. At the same time, the multi-point clamping fixation method improves the stability of the workpiece during processing and reduces the workpiece displacement caused by vibration or cutting force.

[0022] 2. The inner circumference of the positioning hole on the first positioning block and the outer circumference of the connecting piece are both provided with a threaded structure. When the connecting piece rotates, due to the meshing action of the threads, the connecting piece generates a linear motion along the thread direction in the positioning hole, thereby driving the second positioning block to accurately adjust its position relative to the first positioning block, thereby achieving the effect of clamping the workpiece. The operation is simple and does not require complex tools. At the same time, the self-locking function of the threaded connection ensures the stability and reliability of the workpiece during processing.

[0023] 3. The accommodating groove provided on the first positioning block can be used to adapt to workpieces with irregular or complex shapes, so that their extended parts can be placed in the accommodating groove without abnormal protrusion, thus avoiding inaccurate positioning or inability to fix; at the same time, auxiliary positioning parts are used to prevent the workpiece from shifting during the processing process, significantly improving the positioning accuracy and reliability of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present application.

[0025] Figure 1 This is a schematic diagram of the overall structure of a workpiece positioning fixture in one embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the overall structure of a split clamp in one embodiment of the present application;

[0027] Figure 3 This is a partial structural diagram of an embodiment of the present application;

[0028] Figure 4 This is a partial exploded schematic diagram of an embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of the positioning fixture of the flange end of the oil receiving probe in a working state in one embodiment of the present application.

[0030] Description of the accompanying drawings: split clamp 10; first positioning block 101; positioning hole 1010; step portion 1011; accommodating groove 1012; second positioning block 102; through hole 1020; connecting member 200; limiting ridge 201; auxiliary positioning member 30; clamp base plate 40; fixing member 50; oil probe flange end blank 60. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0032] To simplify the drawings, only the portions relevant to the application are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0033] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0034] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0036] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] In modern machining, workpiece positioning fixtures play a vital role in ensuring machining accuracy and improving production efficiency. Traditional workpiece positioning fixtures typically use upper and lower limit blocks for clamping and positioning. While this approach is feasible in some cases, it has some significant limitations and disadvantages.

[0038] First, traditional positioning methods often fail to guarantee precise workpiece positioning. Due to tolerances between the mating surfaces of the positioning block and the workpiece, this can lead to inaccurate positioning, which in turn affects machining accuracy. This requires the operator to repeatedly adjust the position of the fixture to ensure the workpiece is correctly positioned, which undoubtedly increases the complexity of the operation and processing time.

[0039] Secondly, traditional positioning methods may not provide sufficient stability during the processing. The workpiece may become loose due to vibration or cutting force during the processing, which not only affects the processing quality of the workpiece, but also may bring potential safety risks.

[0040] In order to solve the problems in traditional positioning methods, the present application provides a workpiece positioning fixture that can provide a more accurate and stable positioning method, reduce clamping time, and thus improve production efficiency and processing quality.

[0041] Reference Manual Figure 1 The present application provides a workpiece positioning fixture, which includes multiple split fixtures 10, each of which is located on the contour trajectory of the corresponding workpiece, ensuring that the contours of the fixture and the workpiece can be aligned, thereby providing optimal support and positioning for the workpiece.

[0042] Specifically, such as Figure 2 and Figure 3As shown, each split fixture 10 includes a first positioning block 101 and a second positioning block 102. The first positioning block 101 is fixed to the workbench surface and serves as the fixture's fixed base. The second positioning block 102 is movably connected to the first positioning block 101. The relative distance between the first and second positioning blocks 101, 102 is adjustable, allowing the fixture to accommodate workpieces of various sizes. By adjusting the distance between the two positioning blocks, the operator can ensure that the workpiece is firmly clamped during processing while reducing unnecessary pressure on the workpiece.

[0043] At the same time, when the workpiece positioning fixture clamps and positions the workpiece, a part of the workpiece is clamped between the first positioning block 101 and the second positioning block 102, and multiple split fixtures 10 are used to achieve multi-point clamping and fixation of the workpiece, which significantly improves the stability of the workpiece during the processing, not only reduces the vibration of the workpiece, but also improves the processing accuracy.

[0044] It can be understood that the workpiece positioning fixture in this embodiment adopts a multi-point clamping and fixing method, which can apply pressure to the workpiece from multiple directions, multiple positions, and multiple angles for positioning, thereby improving the adaptability and accuracy of the fixture, so that even workpieces with complex contours or irregular shapes can be effectively fixed, thereby broadening the application range of the fixture.

[0045] In this embodiment, the distance between the second positioning block 102 and the first positioning block 101 is adjustable, which can be achieved in many ways. For example, the second positioning block 102 and the first positioning block 101 are connected by an elastic member (not shown in the drawings). The elastic member is in a compressed state in its natural state, so that the second positioning block 102 can be pressed in the direction of the first positioning block 101. When it is necessary to press the workpiece for positioning, the second positioning block 102 is pulled in a direction away from the first positioning block 101 to open the gap between the two and place the workpiece. Then, the second positioning block 102 rebounds under the action of the elastic member, pressing the workpiece to complete the positioning of the workpiece. In addition, the displacement of the second positioning block 102 can also be achieved by pneumatic or hydraulic means, etc., which will not be described in detail here.

[0046] Meanwhile, the shape profiles of the first positioning block 101 and the second positioning block 102 are not particularly limited in this embodiment, and the shapes and sizes of the two positioning blocks can be adjusted according to the shapes and sizes of the workpiece.

[0047] On the basis of the above embodiments, refer to the attached Figure 4Each split clamp 10 also includes a connecting piece 200. The first positioning block 101 is provided with a positioning hole 1010. The positioning hole 1010 has a preset depth and extends along the height direction of the first positioning block 101. The connecting piece 200 is movably inserted into the positioning hole 1010 and simultaneously connects the first positioning block 101 and the second positioning block 102, so that the second positioning block 102 can be displaced along the height direction of the connecting piece 200. The second positioning block 102 can be adjusted according to the specific height and thickness of the workpiece to achieve the best clamping effect, which significantly improves the flexibility of the clamp and enables it to adapt to more diverse workpieces.

[0048] Furthermore, the positioning hole 1010 in the first positioning block 101 not only provides a stable insertion channel for the connector 200 but also serves as a guide. This design ensures that the second positioning block 102 can precisely move along the height of the connector 200 during clamping or loosening, without deflecting in other directions. This precise guidance ensures that the second positioning block 102 can reliably align with the workpiece, achieving stable and accurate positioning.

[0049] Optionally, the connector 200 can be provided with a telescopic structure as needed. This telescopic structure can be a screw-type, rack-type, or hydraulic / pneumatic type, allowing the connector 200 to extend or contract along its length. When the connector 200 extends or contracts, the second positioning block 102 precisely moves in height, thereby adjusting its contact position with the workpiece.

[0050] In one embodiment, a threaded structure is provided on the inner circumference of the positioning hole 1010 in the first positioning block 101 and on the outer circumference of the connector 200. This allows the connector 200 to move axially within the positioning hole 1010 while simultaneously adjusting the position of the second positioning block 102 through rotational motion. When the connector 200 rotates, the meshing action of the threads causes it to move linearly within the positioning hole 1010 along the direction of the threads, thereby driving the second positioning block 102 to precisely adjust its position relative to the first positioning block 101.

[0051] Among them, the threaded structure provides a simple and precise method to control the position of the second positioning block 102. By precisely controlling the rotation angle of the connecting member 200, the position of the second positioning block 102 can be easily adjusted. At the same time, the threaded connection has a self-locking function. When clamping the workpiece, the connecting member 200 will not loosen easily, thereby ensuring the stability of the workpiece during the processing; on the other hand, the threaded structure can make the fixture more compact, reduce space occupancy, and avoid using some elastic structures or elastic parts to occupy the internal space of the first positioning block 101.

[0052] Optionally, based on the above embodiment, a second positioning block 102 is fixed to the end of the connector 200 away from the first positioning block 101. By rotating the second positioning block 102, its position can be adjusted to compress and position the workpiece. Furthermore, a plurality of latching teeth can be provided circumferentially on the second positioning block 102. These latching teeth ensure that the workpiece can be quickly and accurately positioned regardless of the position to which the second positioning block 102 is rotated. The number and distribution of the latching teeth can be optimized based on the workpiece profile and processing requirements to achieve optimal positioning.

[0053] In one embodiment, a limiting flange 201 is provided on the connector 200, and a through hole 1020 is provided on the second positioning block 102. The width of the limiting flange 201 is greater than the diameter of the through hole 1020 in the second positioning block 102. This ensures that when the connector 200 passes through the through hole 1020 in the second positioning block 102, the limiting flange 201 cannot pass through the hole, thereby limiting the range of movement of the connector 200. During actual assembly, when the end of the connector 200 without the limiting flange 201 is threadedly connected to the first positioning block 101, the operating base of the split clamp 10 is formed.

[0054] During operation, by rotating the connecting member 200, the limiting protrusion 201 moves toward the first positioning block 101, pushing the second positioning block 102 to move along the axial direction of the connecting member 200 until it abuts against the step 1011 provided on the first positioning block 101. The presence of the step 1011 provides a support platform for the second positioning block 102, ensuring stability during the processing process.

[0055] At the same time, the second positioning block 102 is restricted between the limiting protrusion 201 and the step portion 1011, forming a stable fixed structure. The limiting protrusion 201 prevents the second positioning block 102 from moving in the falling direction, while the step portion 1011 prevents the second positioning block 102 from excessively displacing in the direction close to the first positioning block 101, so that the second positioning block 102 is precisely fixed in the desired position.

[0056] In this embodiment, through the combination of threaded connection and limiting flange 201, the operator can, through simple operation, make the limiting flange 201 on the connecting member 200 press the second positioning block 102 to position the workpiece. At the same time, the second positioning block 102 is fixed between the limiting flange 201 and the step portion 1011, so that the workpiece can still maintain precise positioning under high-speed processing or under large cutting force, thereby ensuring the processing quality.

[0057] In one embodiment, Figure 2As shown, the first positioning block 101 is provided with a receiving groove 1012. The size and shape of the receiving groove 1012 are set according to the specific extended portion or irregular portion of the workpiece, so that the unconventional portion of the workpiece can be accommodated (see the appendix of the specification). Figure 5 ), thereby ensuring stability and precision during the processing, the accommodating groove 1012 corresponds to the position of the second positioning block 102, so that the second positioning block 102 can work together with the accommodating groove 1012 to provide favorable support and fixation for the workpiece.

[0058] Through the arrangement in this embodiment, the positioning of the workpiece becomes more flexible and stable. Whether it is a workpiece with a complex contour or a workpiece with a protruding part or an irregular shape, it can be placed in the receiving groove 1012 without causing abnormal protrusions.

[0059] Understandably, when faced with workpieces with complex contours, traditional workpiece positioning fixtures may not be able to provide adequate adaptation due to the irregular shape of the workpiece, resulting in problems such as inadequate positioning or uneven clamping force during processing, which not only affects processing efficiency but may also cause damage to the workpiece or a decrease in processing quality. Similarly, without the accommodating groove 1012, the first positioning block 101 and the second positioning block 102 may only provide basic clamping functions and cannot be optimized for the specific shape of the workpiece, making it impossible for the fixture to accurately clamp the workpiece.

[0060] In this embodiment, the accommodating groove 1012 can be set according to the specific shape of the workpiece to ensure that irregular parts of the workpiece are also accommodated, and different split fixtures 10 can be designed with accommodating grooves 1012 of different depths and sizes to adapt to different areas on the workpiece, thereby solving the positioning problem of workpieces with complex contours.

[0061] In one embodiment, based on the above embodiment, an auxiliary positioning member 30 is provided on the first positioning block 101 to prevent the workpiece from shifting during machining, significantly improving the workpiece positioning accuracy and reliability, and is particularly suitable for workpieces with complex shapes or prone to sliding. The auxiliary positioning member 30 is detachably connected to the first positioning block 101, facilitating rapid replacement, installation, removal, or adjustment based on the specific needs of the workpiece to achieve optimal positioning.

[0062] The auxiliary positioning member 30 also features a smooth surface, reducing friction between the workpiece and the fixture. This smooth surface treatment also helps preserve the workpiece's surface quality, preventing scratches or damage during the positioning process. More importantly, the auxiliary positioning member 30 can at least partially abut against the workpiece's outer surface during positioning. This abutment not only provides stable support but also effectively prevents the workpiece from shifting during machining.

[0063] In actual operation, the auxiliary positioning part 30 abuts against the surface of the workpiece, and multiple auxiliary positioning parts 30 can be produced on multiple split fixtures 10. At this time, they can cooperate with the second positioning block 102 to limit the workpiece from multiple directions, thereby preventing it from falling off and ensuring the precise positioning of the workpiece during the processing.

[0064] In addition, based on the present embodiment, a snap-fit ​​or magnetic method may be used to achieve quick assembly and disassembly of the auxiliary positioning member 30 . This method is a common technique and will not be described in detail here.

[0065] In one embodiment, Figure 1 and Figure 4 As shown, the workpiece positioning fixture also includes a fixture base plate 40 and several fixing members 50. The fixture base plate 40 is arranged on the workbench and serves as the base of the entire fixture system. The fixture base plate 40 is provided with several fixing members 50. The fixing members 50 are used to form a stable plug-in connection with the first positioning block 101 in the split fixture 10. In other words, the bottom of each first positioning block 101 is mated with a corresponding fixing member 50, allowing the split fixture 10 to be connected or separated from the fixture base plate 40, thereby achieving rapid fixture configuration and replacement.

[0066] Furthermore, the bottom of each split angle is connected to two or more fixing members 50. Through the multi-point support structure, the clamp is effectively prevented from deflecting during use, thereby enhancing the overall reliability.

[0067] Similarly, in some cases, the outer contour of the fixing part 50 is non-circular. Similarly, the bottom of each split clamp 10 is designed with a non-circular plug-in structure that matches the outer contour of the fixing part 50, and the non-circular hole opened on the clamp base plate 40 corresponds to the non-circular outer contour of the fixing part 50. This matching method not only provides a stable connection, but also effectively prevents the split clamp 10 from deflecting during use through its non-circular geometric characteristics.

[0068] Optionally, a quadruple zero-point locator is provided at the bottom of the fixture base plate 40 to ensure that the horizontal position of the fixture base plate 40 can be firmly maintained on the positioning reference plane, so that the fixture is not easily moved or deflected due to external forces during processing or operation.

[0069] In one embodiment, according to another aspect of the present application, the present application further provides a positioning fixture for the flange end of the oil probe, which can be found in the appendix of the specification. Figure 5The fixture adopts the above-mentioned workpiece positioning fixture. In particular, the workpiece in the above-mentioned workpiece positioning fixture is specifically the oil-receiving probe rod flange end or the oil-receiving probe rod flange end blank 60. At the same time, the split fixture 10 is arranged along the contour trajectory of the oil-receiving probe rod flange end or its blank, thereby realizing multi-point pressing and positioning of the oil-receiving probe rod flange end or the oil-receiving probe rod flange end blank 60.

[0070] As can be understood from the drawings in the specification, the fixture uniformly applies clamping force to the oil probe flange end blank 60 through multiple independently controllable pressing points, thereby achieving precise multi-point positioning. This not only improves positioning accuracy, but also effectively prevents vibration and displacement of the oil probe flange end blank 60 during processing. The clamping and positioning of the oil probe flange end is similar, with the difference being that the oil probe flange end is a finished component, which is positioned by the fixture for some more precise grinding or special processing; while the oil probe flange end blank 60 is raw material, and its size and shape may differ significantly from the finished component. There is usually a certain margin for subsequent processing to transform it into the finished oil probe flange end component. Therefore, the fixture can apply a greater clamping force to the oil probe flange end blank 60 to ensure its stability during processing.

[0071] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the present application. It should be noted that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications should also be considered as the scope of protection of the present application.

Claims

1. A workpiece positioning fixture, characterized in that: include: A plurality of split fixtures, each of the split fixtures being located on a contour trajectory of a corresponding workpiece; Each of the split fixtures includes a first positioning block and a second positioning block. The first positioning block is arranged on the workbench, and the second positioning block is movably connected to the first positioning block. The relative distance between the second positioning block and the first positioning block is adjustable. When the workpiece positioning fixture clamps and positions the workpiece, part of the workpiece is clamped between the first positioning block and the second positioning block, thereby forming multi-point compression and fixation on the workpiece.

2. The workpiece positioning fixture according to claim 1, characterized in that: The first positioning block has a positioning hole, which has a preset depth and extends along the height direction of the first positioning block; Each of the split clamps also includes a connecting piece, which is movably arranged and inserted into the positioning hole, and simultaneously connects the first positioning block and the second positioning block, so that when the workpiece is clamped and positioned, the second positioning block can be displaced along the height direction of the connecting piece.

3. The workpiece positioning fixture according to claim 2, characterized in that: The inner periphery of the positioning hole and the outer periphery of the connecting member are provided with corresponding threaded structures, and the connecting member and the first positioning block form a threaded connection, so that when the connecting member rotates, the relative distance between the first positioning block and the second positioning block is adjusted.

4. The workpiece positioning fixture according to claim 3, characterized in that: The connecting member is provided with a limiting convex edge at an end portion away from the first positioning block, a through hole is provided on the second positioning block, the width of the limiting convex edge is greater than the aperture of the through hole, the first positioning block is provided with a step portion, and the end of the connecting member not provided with the limiting convex edge passes through the through hole provided on the second positioning block and is threadedly connected to the first positioning block; The connecting member can be operated to rotate, so that the limiting protrusion moves in a direction toward the first positioning block until the second positioning block is pushed to abut against the step portion.

5. The workpiece positioning fixture according to claim 1, characterized in that: The first positioning block is provided with an accommodating groove, which corresponds to the position of the second positioning block and is used to adapt to the extended portion or irregular portion of the workpiece.

6. The workpiece positioning fixture according to any one of claims 1 to 5, characterized in that: An auxiliary positioning piece is provided on the first positioning block, and the auxiliary positioning piece and the first positioning block are detachably connected; The auxiliary positioning member has a smooth surface, so that when the workpiece is positioned, at least a portion of the outer surface of the workpiece abuts against the surface of the auxiliary positioning member to prevent the workpiece from shifting.

7. The workpiece positioning fixture according to claim 6, characterized in that: Also includes: A fixture base plate and several fixing parts, the fixture base plate is set on the workbench, several fixing parts are plugged into the upper surface of the fixture base plate, and the bottom of each first positioning block is plugged into the corresponding fixing part to connect the split fixture to the fixture base plate.

8. The workpiece positioning fixture according to claim 7, characterized in that: The bottom of each split clamp is correspondingly connected to two or more fixing members to prevent the split clamp from deflecting; and / or, The outer periphery of the fixing member is non-circular, and a corresponding non-circular hole is provided on the bottom plate of the clamp for the fixing member to be inserted into, thereby preventing the split clamp from deflecting due to the non-circular contour.

9. The workpiece positioning fixture according to claim 7 or 8, characterized in that: A quadruple zero-point locator is provided at the bottom of the fixture base plate, which is used to keep the horizontal position of the fixture base plate at a positioning reference plane.

10. A positioning fixture for the flange end of an oil probe, characterized in that: A workpiece positioning fixture according to any one of claims 1 to 9 is used, wherein a plurality of the split fixtures are arranged along the contour trajectory of the oil-receiving probe flange end or the oil-receiving probe flange end blank, and are used to perform multi-point pressing and fixing of the oil-receiving probe flange end or the oil-receiving probe flange end blank to assist processing.

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