Positioning structure for machining of a hollow profile

Abstract

The utility model relates to profile processing technical field especially relates to a kind of positioning structure of cavity profile machining, including base, fixed X-axis fixed positioning mechanism, X-axis dynamic positioning mechanism, Y-axis fixed positioning mechanism, Y-axis dynamic positioning mechanism and Z-axis driving mechanism are equipped on the base, the X-axis fixed positioning mechanism and X-axis dynamic positioning mechanism are along the length direction interval arrangement of the base, the Y-axis fixed positioning mechanism and the Y-axis dynamic positioning mechanism are along the width direction interval arrangement of the base;Z-axis lower arm is fixedly arranged on the output shaft of Z-axis driving mechanism, Z-axis lower arm is driven along vertical axis rotation while moving in vertical direction under the drive of Z-axis driving mechanism.The utility model has the beneficial effects that: realize the multidirectional clamping of cavity profile, ensure the stability of cavity profile positioning;Avoid the feeding of cavity profile to cause obstruction.

Description

Technical Field

[0001] This utility model relates to the field of profile processing technology, and in particular to a positioning structure for machining cavity profiles. Background Technology

[0002] Profiles are long, strip-shaped materials with specific cross-sectional shapes and dimensions, processed through processes such as extrusion. These materials are widely used in modern industry and construction, possessing many excellent properties and characteristics. In automobile manufacturing, profiles are used to manufacture components such as body frames, engine blocks, wheels, and fenders, reducing vehicle weight and improving fuel efficiency and vehicle performance.

[0003] Profiles typically have cavities. Since the wall thickness of cavity profiles is generally not very thick, they need to be clamped using fixtures before processing. Existing fixtures for cavity profiles usually only clamp the two ends and sides. Excessive clamping force can easily damage the surface of the cavity profile, while insufficient clamping force can lead to unstable clamping, affecting subsequent processing. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a positioning structure for machining cavity profiles, which can clamp the cavity profiles from multiple directions and ensure the stability of the clamping of the cavity profiles.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A positioning structure for machining hollow profiles includes a base, on which an X-axis fixed positioning mechanism, an X-axis movable positioning mechanism, a Y-axis fixed positioning mechanism, a Y-axis movable positioning mechanism, and a Z-axis driving mechanism are fixedly mounted. The X-axis fixed positioning mechanism and the X-axis movable positioning mechanism are spaced apart along the length direction of the base and are used to clamp and fix the two ends of the hollow profile in the length direction. The Y-axis fixed positioning mechanism and the Y-axis movable positioning mechanism are spaced apart along the width direction of the base and are used to clamp and fix the side of the hollow profile in the width direction. A Z-axis lower pressure arm is fixedly mounted on the output shaft of the Z-axis driving mechanism. The Z-axis lower pressure arm rotates along the vertical axis and moves in the vertical direction under the drive of the Z-axis driving mechanism.

[0006] The beneficial effects of this utility model are as follows: This utility model clamps the two ends of the cavity profile in the length direction through the X-axis fixed positioning mechanism and the X-axis moving positioning mechanism, and clamps the two sides of the cavity profile in the width direction through the Y-axis fixed positioning mechanism and the Y-axis moving positioning mechanism. Then, the Z-axis driving mechanism drives the Z-axis lower pressure arm to rotate and press down, pressing the cavity profile tightly onto the base, thereby achieving multi-directional clamping and fixing of the cavity profile and ensuring the stability of the cavity profile positioning. At the same time, since the Z-axis driving mechanism can drive the Z-axis lower pressure arm to rotate along the vertical axis, the Z-axis lower pressure arm can be rotated away from the vertical above the cavity profile loading position before the cavity profile is loaded, avoiding obstruction to the loading of the cavity profile.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the Y-axis fixed positioning mechanism includes a Y-axis fixed positioning seat, which is fixed on the base. A Y-axis fixed positioning block is fixedly provided on the side of the Y-axis fixed positioning seat facing the Y-axis movable positioning mechanism. The side of the Y-axis fixed positioning block facing the Y-axis movable positioning mechanism is provided with a central positioning surface and positioning inclined surfaces on both sides of the central positioning surface. The positioning inclined surfaces gradually extend away from the Y-axis movable positioning mechanism from one end connected to the central positioning surface to the other end.

[0009] The beneficial effects of adopting the above-mentioned further solution are: when machining parts are positioned using the blank surface, the positioning surface traditionally needs to be small enough to achieve accurate positioning. When positioning the side of the cavity profile, the middle positioning surface first abuts against the side wall of the cavity groove to achieve accurate positioning. Then, the two positioning inclined surfaces abut against the side wall of the cavity profile to increase the positioning area and ensure the stability of positioning.

[0010] Furthermore, the Y-axis dynamic positioning mechanism includes a Y-axis linear drive mechanism, the output shaft of which is disposed toward the Y-axis fixed positioning mechanism, and a Y-axis side pressure plate is fixedly provided on the output shaft of the Y-axis linear drive mechanism.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the Y-axis linear drive mechanism drives the Y-axis side top pressure plate to move, thereby pushing the cavity profile to move towards the Y-axis fixed positioning mechanism, realizing the clamping of the cavity profile in the width direction.

[0012] Furthermore, the X-axis fixing and positioning mechanism includes an X-axis fixing and positioning seat, which is fixed on the base.

[0013] The advantages of adopting the above-mentioned further solution are: the X-axis fixed positioning mechanism adopts an X-axis fixed positioning seat fixed on the base, which has a simple structure and is easy to install.

[0014] Furthermore, the X-axis dynamic positioning mechanism includes an X-axis linear drive mechanism, the output shaft of which is disposed toward the X-axis fixed positioning mechanism, and an X-axis side pressure plate is fixedly provided on the output shaft of the X-axis linear drive mechanism.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the X-axis linear drive mechanism drives the X-axis side pressure plate to move, thereby pushing the cavity profile to move towards the X-axis fixed positioning mechanism, realizing the clamping of the cavity profile in the length direction.

[0016] Furthermore, one end of the Z-axis pressing arm is fixedly connected to the output shaft of the Z-axis drive mechanism, and a pressing block is fixedly provided at the bottom of the other end of the Z-axis pressing arm.

[0017] The beneficial effect of adopting the above-mentioned further solution is that one end of the Z-axis pressing arm is fixedly connected to the output shaft of the Z-axis drive mechanism, and then a pressing block is fixedly set at the bottom of the other end, increasing the rotation range of the pressing block, so that a suitable pressing positioning position can be selected according to the width of the cavity profile.

[0018] Furthermore, the bottom perimeter of the pressing block is provided with an angle.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the bevel setting plays a guiding role when clamping the cavity profile, while avoiding damage to the outer wall of the cavity profile by the edge.

[0020] Furthermore, one end of the Z-axis pressure arm connected to the output shaft of the Z-axis drive mechanism is fixedly or integrally provided with an anti-rotation seat, the anti-rotation seat is provided with an anti-rotation hole, the Z-axis drive mechanism is fixedly provided with a lifting mechanism, and the output shaft of the lifting mechanism is fixedly provided with an anti-rotation rod.

[0021] The beneficial effects of adopting the above-mentioned further solution are: the lifting mechanism raises and lowers the anti-rotation rod, so that the anti-rotation rod is inserted into the anti-rotation hole, thereby positioning the Z-axis lower pressure arm. This can fix the Z-axis lower pressure arm in its pressing and clamping positioning state or in its pre-clamping state, thus avoiding machining accidents caused by the accidental rotation of the Z-axis lower pressure arm.

[0022] Furthermore, multiple equal-height blocks are provided between the X-axis fixed positioning mechanism and the X-axis moving positioning mechanism, and the bottom end of the equal-height blocks is fixed on the base.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the setting of the equal height blocks can support the bottom end of the cavity profile.

[0024] Furthermore, a detection mechanism for detecting whether the cavity profile has been properly loaded is provided between the X-axis fixed positioning mechanism and the X-axis moving positioning mechanism.

[0025] The beneficial effect of adopting the above-mentioned further solution is that the detection mechanism can detect whether the cavity profile is in place, thereby sending a feedback signal to the equipment to determine whether there is a cavity profile to be processed. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the installation structure of the Y-axis fixing and positioning block in this utility model;

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Base; 2. Z-axis drive mechanism; 3. Z-axis lower pressure arm; 4. Y-axis fixed positioning seat; 5. Y-axis fixed positioning block; 6. Central positioning surface; 7. Positioning inclined surface; 8. Angled angle; 9. Y-axis linear drive mechanism; 10. Y-axis side top pressure plate; 11. X-axis fixed positioning seat; 12. X-axis linear drive mechanism; 13. X-axis side top pressure plate; 14. Lower pressure block; 15. Anti-rotation seat; 16. Anti-rotation hole; 17. Anti-rotation rod; 18. Equal height block; 19. Detection mechanism. Detailed Implementation

[0030] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0031] like Figure 1 As shown, an embodiment of this utility model includes a base 1, on which an X-axis fixed positioning mechanism, an X-axis movable positioning mechanism, a Y-axis fixed positioning mechanism, a Y-axis movable positioning mechanism, and a Z-axis drive mechanism 2 are fixedly mounted. The X-axis fixed positioning mechanism and the X-axis movable positioning mechanism are spaced apart along the length direction of the base 1 to clamp and fix the two ends of the hollow profile in the length direction. The Y-axis fixed positioning mechanism and the Y-axis movable positioning mechanism are spaced apart along the width direction of the base 1 to clamp and fix the side of the hollow profile in the width direction. A Z-axis lower pressure arm 3 is fixedly mounted on the output shaft of the Z-axis drive mechanism 2. The Z-axis lower pressure arm 3 rotates along the vertical axis and moves in the vertical direction under the drive of the Z-axis drive mechanism 2.

[0032] In one embodiment of this utility model, the base 1 is elongated, and the X-axis fixed positioning mechanism and the X-axis movable positioning mechanism are spaced apart along the length direction of the base 1; there are multiple Y-axis fixed positioning mechanisms and multiple Y-axis movable positioning mechanisms, which are spaced apart along the length direction of the base 1. The X-axis fixed positioning mechanism and the X-axis movable positioning mechanism form a processing area for placing the cavity profile. The multiple Y-axis fixed positioning mechanisms are located on one side of the processing area, and the multiple Y-axis movable positioning mechanisms are located on the other side of the processing area, and the Y-axis fixed positioning mechanism and the Y-axis movable positioning mechanism are arranged in a one-to-one correspondence.

[0033] The number of Z-axis drive mechanisms 2 is one or more. When the number of Z-axis drive mechanisms 2 is two or more, the two or more Z-axis drive mechanisms 2 can be arranged alternately on one side of the processing area or on both sides of the processing area.

[0034] In the embodiments of this utility model, the X-axis fixed positioning mechanism, X-axis moving positioning mechanism, Y-axis fixed positioning mechanism, Y-axis moving positioning mechanism and Z-axis driving mechanism 2 constitute a set of clamping components for clamping the cavity profile. One or more sets of the clamping components can be provided on the base 1 to realize the clamping and fixing of multiple cavity profiles, thereby realizing the simultaneous processing of multiple cavity profiles and improving processing efficiency.

[0035] Multiple equal-height blocks 18 are provided between the X-axis fixed positioning mechanism and the X-axis movable positioning mechanism. The bottom end of each equal-height block 18 is fixed to the base 1, and the equal-height blocks 18 can support the bottom end of the cavity profile. The equal-height blocks 18 are used to ensure that the cavity profile is horizontally positioned. Furthermore, the multiple equal-height blocks 18 can be configured so that their tops are on the same horizontal plane, or they can support different positions on the bottom of the cavity profile according to the bottom structure of the cavity profile to be processed. When different positions on the bottom of the cavity profile are not on the same plane, the height of the equal-height blocks 18 can be set according to the position requiring support, ensuring that the cavity profile is horizontal after being supported by the equal-height blocks 18.

[0036] like Figure 2As shown in the embodiment of this utility model, the Y-axis fixed positioning mechanism includes a Y-axis fixed positioning seat 4, which is fixed on the base 1. A Y-axis fixed positioning block 5 is fixedly provided on the side of the Y-axis fixed positioning seat 4 facing the Y-axis movable positioning mechanism. The Y-axis fixed positioning block 5 has a central positioning surface 6 and positioning inclined surfaces 7 on both sides of the central positioning surface 6 on the side facing the Y-axis movable positioning mechanism. The positioning inclined surfaces 7 gradually extend away from the Y-axis movable positioning mechanism from one end connected to the central positioning surface 6. When machining parts are positioned using a blank surface, the traditional positioning surface needs to be small enough for precise positioning. When positioning the side of a hollow profile, the central positioning surface 6 first abuts against the side wall of the hollow profile to achieve precise positioning. Then, the two positioning inclined surfaces 7 abut against the side wall of the hollow profile to increase the positioning area and ensure positioning stability.

[0037] In this embodiment, the middle positioning surface 6 of the Y-axis fixing and positioning block 5 is provided with an airtight hole. The airtight hole can be connected to an external air source through the air passage inside the Y-axis fixing and positioning block 5 and the external pipe. An air pressure gauge is installed on the external pipe. After the hollow profile is clamped, the air source can fill the airtight hole with gas. After the middle positioning surface 6 abuts against the outer wall of the hollow profile, the airtight hole is blocked, which causes the air pressure in the external pipe to increase, indicating that it has been clamped in place. If the air pressure in the external air pipe does not increase, it means that the middle positioning surface 6 and the outer wall of the hollow profile are not sealed, and it can be determined that it has not been clamped in place.

[0038] The Y-axis dynamic positioning mechanism includes a Y-axis linear drive mechanism 9. The output shaft of the Y-axis linear drive mechanism 9 is positioned towards the Y-axis fixed positioning mechanism, and a Y-axis side pressure plate 10 is fixedly mounted on the output shaft of the Y-axis linear drive mechanism 9. The Y-axis linear drive mechanism 9 drives the Y-axis side pressure plate 10 to move, thereby pushing the cavity profile towards the Y-axis fixed positioning mechanism to achieve clamping of the cavity profile in the width direction.

[0039] In this embodiment, the Y-axis linear drive mechanism 9 can be a linear motor, a cylinder, or a hydraulic cylinder. When the Y-axis linear drive mechanism 9 is a cylinder or a hydraulic cylinder, a corresponding channel can be provided in the base 1 to facilitate the driving of the Y-axis linear drive mechanism 9.

[0040] The X-axis fixing and positioning mechanism includes an X-axis fixing and positioning seat 11, which is fixed on the base 1. The X-axis fixing and positioning mechanism adopts an X-axis fixing and positioning seat 11 fixed on the base 1, which has a simple structure and is easy to install.

[0041] The X-axis dynamic positioning mechanism includes an X-axis linear drive mechanism 12. The output shaft of the X-axis linear drive mechanism 12 is positioned towards the X-axis fixed positioning mechanism, and an X-axis side pressure plate 13 is fixedly mounted on the output shaft of the X-axis linear drive mechanism 12. The X-axis linear drive mechanism 12 drives the X-axis side pressure plate 13 to move, thereby pushing the cavity profile towards the X-axis fixed positioning mechanism to achieve clamping of the cavity profile along its length.

[0042] In this embodiment, the X-axis linear drive mechanism 12 can be a linear motor, a cylinder, or a hydraulic cylinder. When the X-axis linear drive mechanism 12 is a cylinder or a hydraulic cylinder, a corresponding channel can be provided in the base 1 to facilitate the driving of the X-axis linear drive mechanism 12.

[0043] In an embodiment of this utility model, one end of the Z-axis pressing arm 3 is fixedly connected to the output shaft of the Z-axis drive mechanism 2, and a pressing block 14 is fixedly provided at the bottom of the other end of the Z-axis pressing arm 3. The fixed connection of one end of the Z-axis pressing arm 3 to the output shaft of the Z-axis drive mechanism 2, and the fixed placement of the pressing block 14 at the bottom of the other end, increases the rotation range of the pressing block 14, allowing for the selection of a suitable pressing and positioning position based on the width of the cavity profile.

[0044] In an embodiment of this utility model, the Z-axis drive mechanism 2 can be a telescopic rotary hydraulic cylinder (existing technology in the art), which can extend and retract the output shaft while rotating, thereby driving the Z-axis lower pressure arm 3 to rotate and enter the vertical upper part of the cavity profile until it abuts the top surface of the cavity profile.

[0045] Furthermore, the bottom periphery of the lower pressure block 14 is provided with an angled angle 8. As the lower pressure block 14 rotates with the Z-axis lower pressure arm 3 and moves toward the base 1 until it abuts the top surface of the cavity profile, the angled angle 8 serves as a guide when clamping the cavity profile, while preventing the edge from damaging the outer wall of the cavity profile.

[0046] In this embodiment, the bottom end of the lower pressure block 14 is provided with an airtight hole. The airtight hole can be connected to an external air source through the air passage inside the Z-axis lower pressure arm 3 and / or an external pipe. A pressure gauge is installed on the external pipe. After the hollow profile is clamped, the air source can fill the airtight hole with gas. After the lower pressure block 14 abuts against the outer wall of the hollow profile, the airtight hole is blocked, which causes the air pressure in the external pipe to increase, indicating that the clamping is in place. If the air pressure in the external pipe does not increase, it means that the lower pressure block 14 and the outer wall of the hollow profile are not sealed, and it can be determined that the clamping is not in place.

[0047] The Z-axis pressing arm 3 is connected to the output shaft of the Z-axis drive mechanism 2, and one end is fixedly or integrally provided with an anti-rotation seat 15. The anti-rotation seat 15 is provided with an anti-rotation hole 16. The Z-axis drive mechanism 2 is fixedly provided with a lifting mechanism, which is fixedly mounted on the housing of the Z-axis drive mechanism 2. An anti-rotation rod 17 is fixedly provided on the output shaft of the lifting mechanism. The lifting mechanism drives the anti-rotation rod 17 to rise and fall, so that the anti-rotation rod 17 is inserted into the anti-rotation hole 16, thereby positioning the Z-axis pressing arm 3. This can fix the downward clamping and positioning state of the Z-axis pressing arm 3 and prevent machining accidents caused by accidental rotation of the Z-axis pressing arm 3. Specifically, when the Z-axis drive mechanism 2 drives the Z-axis pressing arm 3 to abut against the cavity profile, the anti-rotation hole 16 is located vertically above the anti-rotation rod 17. At this time, the lifting mechanism drives the anti-rotation rod 17 to rise, so that the anti-rotation rod 17 is inserted into the anti-rotation hole 16, thereby achieving the positioning of the Z-axis pressing arm 3.

[0048] In embodiments of this utility model, the lifting mechanism can be a linear motor, a pneumatic cylinder, a hydraulic cylinder, or other existing technologies that can drive the anti-rotation rod 17 to move up and down in the vertical direction.

[0049] A detection mechanism 19 is provided between the X-axis fixed positioning mechanism and the X-axis moving positioning mechanism to detect whether the cavity profile is in place. The detection mechanism 19 can detect whether the cavity profile is in place, thereby feeding back a signal to the equipment to determine whether there is a cavity profile to be processed.

[0050] In an embodiment of this utility model, the detection mechanism 19 can be a laser sensor, a displacement sensor, or a gas sensing mechanism. The gas sensing mechanism includes a gas sensing base, the bottom of which is fixed to the base 1. A gas sensing cavity is provided inside the gas sensing base, and the bottom of the gas sensing cavity is connected to an external air source. A pressure gauge is provided on the pipe connecting the gas sensing cavity and the external air source. A vent is provided on the gas sensing base, communicating with the upper part of the gas sensing cavity. A gas rod is slidably disposed inside the gas sensing cavity. Under the action of the external air source, the gas rod moves up and down within the gas sensing cavity, with its top end extending out of the gas sensing base. When the gas rod rises to a certain height under the action of the external air source, the vent connects with the gas sensing cavity to release air. Using this principle, when the hollow profile is fed, the gas rod abuts against the bottom of the hollow profile during its rise, increasing the pressure on the pressure gauge, thus indicating that the feeding is complete and preparation for clamping processing is required.

[0051] This invention uses an X-axis fixed positioning mechanism and an X-axis movable positioning mechanism to clamp the two ends of the hollow profile in the length direction, and a Y-axis fixed positioning mechanism and a Y-axis movable positioning mechanism to clamp the two sides of the hollow profile in the width direction. Then, the Z-axis drive mechanism 2 drives the Z-axis pressing arm 3 to rotate and press down, pressing the hollow profile onto the base 1, thereby achieving multi-directional clamping and fixing of the hollow profile and ensuring the stability of the hollow profile positioning. At the same time, since the Z-axis drive mechanism 2 can drive the Z-axis pressing arm 3 to rotate along the vertical axis, the Z-axis pressing arm 3 can be rotated away from the vertical above the hollow profile loading position before the hollow profile is loaded, avoiding obstruction to the loading of the hollow profile.

[0052] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning structure for machining hollow profiles, characterized in that, The system includes a base (1), on which are fixed an X-axis fixed positioning mechanism, an X-axis movable positioning mechanism, a Y-axis fixed positioning mechanism, a Y-axis movable positioning mechanism, and a Z-axis drive mechanism (2). The X-axis fixed positioning mechanism and the X-axis movable positioning mechanism are spaced apart along the length direction of the base (1) and are used to clamp and fix the two ends of the cavity profile along the length direction. The Y-axis fixed positioning mechanism and the Y-axis movable positioning mechanism are spaced apart along the width direction of the base (1) and are used to clamp and fix the side of the cavity profile along the width direction. A Z-axis lower pressure arm (3) is fixed on the output shaft of the Z-axis drive mechanism (2). The Z-axis lower pressure arm (3) rotates along the vertical axis and moves in the vertical direction under the drive of the Z-axis drive mechanism (2).

2. The positioning structure for machining a cavity profile according to claim 1, characterized in that, The Y-axis fixed positioning mechanism includes a Y-axis fixed positioning seat (4), which is fixed on the base (1). A Y-axis fixed positioning block (5) is fixed on the side of the Y-axis fixed positioning seat (4) facing the Y-axis moving positioning mechanism. A central positioning surface (6) and positioning inclined surfaces (7) are provided on the side of the Y-axis fixed positioning block (5) facing the Y-axis moving positioning mechanism. The positioning inclined surfaces (7) extend gradually away from the Y-axis moving positioning mechanism from one end connected to the central positioning surface (6).

3. The positioning structure for machining a cavity profile according to claim 1, characterized in that, The Y-axis dynamic positioning mechanism includes a Y-axis linear drive mechanism (9), the output shaft of which is disposed toward the Y-axis fixed positioning mechanism, and a Y-axis side pressure plate (10) is fixedly provided on the output shaft of the Y-axis linear drive mechanism (9).

4. The positioning structure for machining a cavity profile according to claim 1, characterized in that, The X-axis fixing and positioning mechanism includes an X-axis fixing and positioning seat (11), which is fixed on the base (1).

5. The positioning structure for machining a cavity profile according to claim 1, characterized in that, The X-axis dynamic positioning mechanism includes an X-axis linear drive mechanism (12), the output shaft of which is disposed toward the X-axis fixed positioning mechanism, and an X-axis side pressure plate (13) is fixedly provided on the output shaft of the X-axis linear drive mechanism (12).

6. The positioning structure for machining a cavity profile according to claim 1, characterized in that, One end of the Z-axis pressure arm (3) is fixedly connected to the output shaft of the Z-axis drive mechanism (2), and a pressure block (14) is fixedly provided at the bottom of the other end of the Z-axis pressure arm (3).

7. The positioning structure for machining a cavity profile according to claim 6, characterized in that, The bottom perimeter of the pressing block (14) is provided with an angle (8).

8. The positioning structure for machining a cavity profile according to claim 6, characterized in that, The Z-axis lower arm (3) is connected to the output shaft of the Z-axis drive mechanism (2) and is fixedly or integrally provided with an anti-rotation seat (15). The anti-rotation seat (15) is provided with an anti-rotation hole (16). The Z-axis drive mechanism (2) is fixedly provided with a lifting mechanism, and the output shaft of the lifting mechanism is fixedly provided with an anti-rotation rod (17).

9. A positioning structure for machining a cavity profile according to any one of claims 1 to 8, characterized in that, Multiple equal-height blocks (18) are provided between the X-axis fixed positioning mechanism and the X-axis moving positioning mechanism, and the bottom end of the equal-height blocks (18) is fixed on the base (1).

10. The positioning structure for machining a cavity profile according to claim 9, characterized in that, A detection mechanism (19) for detecting whether the cavity profile is properly loaded is provided between the X-axis fixed positioning mechanism and the X-axis moving positioning mechanism.

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