Titanium metal workpiece stress detection device

Abstract

The invention discloses a titanium metal workpiece stress detection device, and relates to the stress detection technology, the titanium metal workpiece stress detection device comprises a first circular plate, a plurality of limiting grooves are uniformly formed in the first circular plate along the circumferential direction, moving blocks are slidably mounted in the limiting grooves, two rotating shafts are rotatably mounted on the moving blocks, the upper ends of the rotating shafts penetrate through the limiting grooves, and the lower ends of the rotating shafts penetrate through the limiting grooves. The rotating shaft close to the middle of the first circular plate is sleeved with an inner expansion sleeve, and the rotating shaft far away from the middle of the first circular plate is sleeved with an outer shrinkage sleeve. According to the titanium metal workpiece stress detection device provided by the invention, after the workpiece is pressed by the inner expansion sleeve or the outer shrinkage sleeve, the workpiece is driven to rotate through the synchronous rotation of the inner expansion sleeve or the outer shrinkage sleeve, so that the side wall of the workpiece is uniformly pressed, and therefore, the workpiece can conveniently rotate to switch the stress detection position; and meanwhile, the structure for pressure detection is a clamping transposition structure, so that additional interference on stress detection is avoided.

Description

Technical Field

[0001] The invention relates to a stress detection technology, and in particular to a titanium metal workpiece stress detection device. Background Art

[0002] It is well known that titanium metal workpieces are widely used in aerospace, medical, chemical and other fields due to their excellent physical and chemical properties. However, in order to ensure the quality and safety of these products, various tests are required. The inspection of titanium metal workpieces is generally divided into destructive testing and non-destructive testing. Destructive testing mainly involves stress release through drilling, while non-destructive testing mainly includes chemical method testing and physical method testing. Among them, physical method testing requires physical extrusion of the titanium metal workpiece to be inspected; and annular titanium metal workpieces are a commonly used component, such as titanium alloy annular seals, which require stress testing.

[0003] For example, the patent with the authorization announcement number CN117825164B and the authorization announcement date May 10, 2024, is named a method and device for detecting stress of titanium forgings, including a base plate 1, the top of the base plate 1 is fixedly connected to a connecting column, the inner side of the connecting column is fixedly connected to a track 1, the top of the connecting column is fixedly connected to a push rod 1, the top of the push rod 1 is fixedly connected to a pressing assembly, and also includes: a detection mechanism, the detection mechanism includes a push rod 2 fixedly connected to the top of the base plate 1, the top of the push rod 2 is fixedly connected to the base plate 2, and the outer wall of the base plate 2 is fixedly connected to a slider 1. By setting a pressure assembly, the device can not only detect the workpiece by extrusion, but also detect the workpiece by stretching, thereby increasing the device's detection methods for the workpiece, improving the device's detection effect on the workpiece, and avoiding defects in the workpiece that cannot be detected.

[0004] In the above patent, when stress testing is performed on an annular titanium metal workpiece, in order to ensure uniform testing of the annular titanium metal workpiece, it is necessary to squeeze the annular titanium metal workpiece onto the placement plate through a pressing ring, and then drive the workpiece to rotate by rotating the pressing ring to achieve force at various positions of the workpiece. However, in this process, firstly, friction will be generated between the workpiece and the placement plate when it rotates, and it will be difficult to drive the workpiece to rotate by the pressing ring, and it will also cause damage to the surface of the workpiece. Secondly, no matter what kind of clamping or limiting device is used, as long as the workpiece is squeezed, it will affect the possibility of deformation or fracture of the workpiece, thereby affecting the results of stress testing. Summary of the Invention

[0005] The purpose of the present invention is to provide a titanium metal workpiece stress detection device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A titanium metal workpiece stress detection device comprises a first circular plate, on which a plurality of limit grooves are evenly arranged along its circumference, a moving block is slidably installed in the limit groove, and two rotating shafts are rotatably installed on the moving block, the upper ends of the rotating shafts pass through the limit grooves, an inner expansion sleeve is sleeved on the rotating shaft near the middle of the first circular plate, and an outer contraction sleeve is sleeved on the rotating shaft away from the middle of the first circular plate, and a driving mechanism is also included, which can drive the rotating shaft to rotate synchronously to switch the stress detection position of the workpiece.

[0008] The above-mentioned titanium metal workpiece stress detection device also includes a second circular plate and a third circular plate arranged in sequence along the vertical direction, the first circular plate is located above the second circular plate, the first circular plate, the second circular plate and the third circular plate are connected by a support column, and the first circular plate, the second circular plate and the third circular plate are coaxial.

[0009] In the above-mentioned titanium metal workpiece stress detection device, a plurality of detection heads are axially arranged on the upper end of the first circular plate.

[0010] In the above-mentioned titanium metal workpiece stress detection device, the driving mechanism includes a pressure driving component for driving the moving block to slide along the limiting groove, and also includes a transposition driving component for driving the rotating shaft to rotate.

[0011] The above-mentioned titanium metal workpiece stress detection device, the pressure driving assembly includes a plurality of limit frames circumferentially installed on the second circular plate, a sliding shaft is slidably installed on the limit frame, the sliding shaft and the movable plate are arranged in a one-to-one correspondence, and a connecting frame is screwed between the end of the sliding shaft away from the middle of the second circular plate and the movable plate.

[0012] In the above-mentioned titanium metal workpiece stress detection device, a trapezoidal movable block is fixedly connected to one end of the sliding shaft close to the middle of the second circular plate, the downward end of the trapezoidal movable block is an inclined surface, a through opening is opened in the trapezoidal movable block, an inclined propulsion block is formed at the bottom of the through opening, and the upper end of the inclined propulsion block is also an inclined surface.

[0013] The above-mentioned titanium metal workpiece stress detection device, a driving shaft is slidably installed in the middle of the second circular plate, a frustum portion is formed on the driving shaft, the frustum portion and the trapezoidal movable block are arranged in correspondence, a plurality of pushing rods are installed along the circumference of the upper end of the driving shaft, the pushing rods extend into the through-mouth, the pushing rods and the inclined propulsion block are arranged in correspondence, a push rod is installed in the middle of the third circular plate, and the movable end of the push rod is connected to the bottom of the driving shaft.

[0014] In the above-mentioned titanium metal workpiece stress detection device, the transposition drive assembly includes an I-shaped wheel fixed on a rotating shaft, and multiple I-shaped wheels close to the middle of the first circular plate are connected by a first transmission belt, and multiple I-shaped wheels away from the middle of the first circular plate are connected by a second transmission belt.

[0015] The above-mentioned titanium metal workpiece stress detection device has a limiting seat installed at the bottom of the first circular plate, a sliding support plate is slidably installed on the limiting seat, the bottom of the first circular plate is connected to the limiting spring rod through a connecting plate, the movable end of the limiting spring rod is connected to the sliding support plate, two servo motors are installed at the bottom of the sliding support plate, and a tensioning wheel is installed at the rotating end of the servo motor. The tensioning wheel near the middle of the first circular plate is attached to the first transmission belt, and the tensioning wheel away from the middle of the first circular plate is attached to the second transmission belt.

[0016] In the above-mentioned titanium metal workpiece stress detection device, the distance between the inner expansion sleeve and the outer contraction sleeve is greater than the actual width of the workpiece.

[0017] In the above technical scheme, the present invention provides a titanium metal workpiece stress detection device, comprising an inner expansion sleeve and an outer shrinkage sleeve, the inner expansion sleeve is used to move outward to apply pressure to the inner wall of the annular workpiece for stress detection, and the outer shrinkage sleeve is used to move inward to apply pressure to the outer wall of the annular workpiece for stress detection. In addition, since the inner expansion sleeve and the outer shrinkage sleeve are both installed on corresponding rotatable rotating shafts, the inner expansion sleeve and the outer shrinkage sleeve themselves can also rotate. When the inner expansion sleeve or the outer shrinkage sleeve applies pressure to the workpiece, the workpiece is driven to rotate by the synchronous rotation of the inner expansion sleeve or the outer shrinkage sleeve, so that the side wall of the workpiece is evenly pressurized. In this way, the inner expansion sleeve and the outer shrinkage sleeve have three functions, the first is to apply pressure to the workpiece, the second is to limit the workpiece, and the third is to drive the workpiece to switch the stress detection position through its own rotation; in this way, not only is it convenient for the workpiece to rotate and switch the stress detection position, but the pressure detection structure itself is also a clamping and displacement structure, which will not cause additional interference to the stress detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a titanium metal workpiece stress detection device provided by an embodiment of the present invention.

[0020] Figure 2A schematic diagram of a partial three-dimensional structure of a titanium metal workpiece stress detection device provided by an embodiment of the present invention.

[0021] Figure 3 A cross-sectional view of a limiting mechanism provided in accordance with an embodiment of the present invention.

[0022] Figure 4 For the present invention Figure 3 A partial enlarged view of point X.

[0023] Figure 5 This is a partial three-dimensional structural diagram of a titanium metal workpiece stress detection device provided by another embodiment of the present invention.

[0024] Figure 6 A partial vertical cross-sectional view of a titanium workpiece stress detection device provided in another embodiment of the present invention.

[0025] Figure 7 For the present invention Figure 7 A partial enlarged view of point Y.

[0026] Figure 8 A cross-sectional view of a circular frame provided in accordance with another embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. First circular plate; 11. Support column; 12. Detection head; 13. Limiting groove; 14. Moving block; 15. Rotating shaft; 16. Inner expansion sleeve; 161. Buffer space; 162. Directional breaking groove; 163. Breaking block; 17. Outer shrinking sleeve; 2. Second circular plate; 3. Third circular plate; 5. Driving mechanism; 51. Pressure driving assembly; 511. Limiting frame; 512. Sliding shaft; 513. Connecting frame; 514. Trapezoidal movable block; 515. Through-hole; 516. Tilt propulsion block; 517. Active shaft; 518. Cone portion; 519. Push rod; 52. Transposition driving assembly ;521, I-shaped pulley; 522, first transmission belt; 523, second transmission belt; 524, limiting seat; 525, sliding support plate; 526, servo motor; 527, tensioning pulley; 528, limiting spring rod; 6, two-way protection mechanism; 61, side plate; 62, first arc groove; 63, first driving block; 64, first stop block; 65, second arc groove; 66, second driving block; 67, second stop block; 68, circular frame; 69, working chamber; 70, connecting shaft; 71, limiting gear; 72, rotating disk; 73, accommodating groove; 74, positioning block; 75, positioning groove. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1-8 As shown, an embodiment of the present invention provides a titanium metal workpiece stress detection device, including a first circular plate 1, on which a plurality of limit grooves 13 are evenly opened along its circumference, a moving block 14 is slidably installed in the limit groove 13, and two rotating shafts 15 are rotatably installed on the moving block 14, and the upper ends of the rotating shafts 15 pass through the limit groove 13, and the rotating shafts 15 near the middle of the first circular plate 1 are sleeved with an inner expansion sleeve 16, and the rotating shafts 15 away from the middle of the first circular plate 1 are sleeved with an outer contraction sleeve 17, and also include a driving mechanism 5, which can drive the rotating shaft 15 to rotate synchronously to switch the stress detection position of the workpiece.

[0031] Specifically in this embodiment, the first circular plate 1 is arranged on a horizontal plane, the limiting groove 13 is preferably a square groove, and the extension direction is arranged along the radial direction of the first circular plate 1, the number of the limiting grooves 13 is preferably three, the moving block 14 is also a square structure, the moving block 14 is located below the first circular plate 1, the rotating shaft 15 is rotatably mounted above the moving block 14, and the rotating shaft 15 passes through the limiting groove 13, and there is a certain distance between the rotating shafts 15; the inner expansion sleeve 16 and the outer contraction sleeve 17 are both annular sets, and their diameters and thicknesses are the same. Collectively referred to as a pressure kit, there is a certain distance between the pressure kits, which is defined as a placement distance. The placement distance is used to place an annular titanium metal workpiece (hereinafter referred to as the workpiece). The distance (placement distance) between the inner expansion sleeve 16 and the outer shrinkage sleeve 17 is greater than the actual width of the workpiece (the actual width of the workpiece refers to the distance between the inner wall and the outer wall of the annular workpiece). This is to accommodate workpieces of different widths. Moreover, the placement distance is greater than the actual width of the workpiece, which does not affect the normal operation of the pressure kit. When the inner expansion sleeve 16 applies pressure to the inner wall of the workpiece, When the outer expansion sleeve is pressed against the workpiece, there is a certain distance between the outer expansion sleeve and the workpiece to avoid contact with the workpiece, and vice versa. It should be emphasized that in this embodiment, when the workpiece is placed between the inner expansion sleeve 16 and the outer shrinkage sleeve 17, it does not need to be particularly precise. The position of the workpiece can be adjusted by the inner expansion sleeve 16 and the outer shrinkage sleeve 17, and it can also adapt to workpieces of different widths. The pressure kit is arranged vertically, and the lower end of the pressure kit is in contact with the upper end face of the first circular plate 1. The height of the pressure kit is greater than the thickness of the workpiece. The inner expansion sleeve 16 is mainly used to synchronously move outward to press the inner wall of the workpiece. To apply pressure outward, the outer shrink sleeve 17 is mainly used to synchronously move inward to apply pressure inward to the outer wall of the workpiece, so as to perform stress detection on the workpiece; the driving mechanism 5 can not only be used to drive the moving block 14 to slide in the limiting groove 13, thereby driving the pressure kit to move, but also control the pressure kit itself to rotate around the rotating shaft 15. In this way, when the inner expansion sleeve 16 or the outer shrink sleeve 17 applies a certain force to the workpiece, it can drive the workpiece to rotate by its own rotation, so as to switch the stress detection position of the workpiece to perform uniform stress detection on the workpiece;Specifically, taking the example of the inner side of the workpiece being subjected to an outward force, the workpiece is placed between the inner expansion sleeve 16 and the outer shrinkage sleeve 17, and the driving mechanism 5 controls the moving block 14 to move outward so that the inner expansion sleeve 16 moves outward and applies pressure to the inner wall of the workpiece. In this process, the inner expansion sleeve 16 or the outer shrinkage sleeve 17 first contacts the workpiece and pushes the workpiece to the correct working position, and then applies pressure. Then, the workpiece at this time is subjected to stress detection (stress detection is an existing technology, and here it is mainly to apply pressure to the workpiece to provide a detection environment. The specific stress detection method is not repeated here), and then the driving mechanism 5 drives the workpiece to move outward. The rotating shaft 15 on one side near the middle of the first circular plate 1 rotates, thereby driving the inner expansion sleeve 16 to rotate, so that the workpiece also rotates, and pressure is applied to the rotating workpiece to facilitate uniform stress detection. In summary, the inner expansion sleeve 16 and the outer shrinkage sleeve 17 have three different functions. The first is to apply pressure to the workpiece to provide a working environment. The second is that they can also serve as clamping structures to limit the position of the workpiece (so that annular parts of different widths can be moved to a specified working position). The third is that the workpiece can be driven to rotate by the rotation of the inner expansion sleeve 16 and the outer shrinkage sleeve 17 themselves to switch the stress monitoring position. In this way, the structure for pressure detection itself is also a clamping and displacement structure. It does not require an additional clamping limit structure or a driving structure, and will not cause additional interference to the stress detection, thereby ensuring the accuracy of the stress detection.

[0032] In another embodiment provided by the present invention, it also includes a second circular plate 2 and a third circular plate 3 arranged in sequence along the vertical direction, the first circular plate 1 is located above the second circular plate 2, the first circular plate 1, the second circular plate 2 and the third circular plate 3 are connected by a support column 11, the first circular plate 1, the second circular plate 2 and the third circular plate 3 are coaxial, and the first circular plate 1, the second circular plate 2 and the third circular plate 3 all provide a working place for detection.

[0033] In another embodiment provided by the present invention, a plurality of detection heads 12 are axially arranged on the upper end of the first circular plate 1. The detection heads 12 are prior art and are mainly used to detect whether there is bending or cracking on the surface of the workpiece, which will not be described in detail here.

[0034] In another embodiment provided by the present invention, the driving mechanism 5 includes a pressure driving component 51 for driving the moving block 14 to slide along the limiting groove 13, and also includes a transposition driving component 52 for driving the rotating shaft 15 to rotate. The pressure driving component 51 is mainly used to drive the moving block 14 to slide in the limiting groove 13, and the transposition driving component 52 is mainly used to drive the rotating shaft 15 to rotate, thereby driving the inner expansion sleeve 16 or the outer contraction sleeve 17 to rotate.

[0035] In another embodiment provided by the present invention, the pressure driving assembly 51 includes a plurality of limit frames 511 circumferentially mounted on the second circular plate 2, and a sliding shaft 512 is slidably mounted on the limit frame 511. The number of the sliding shafts 512 is preferably three, and the movement direction of the sliding shaft 512 is parallel to the extension direction of the limit groove 13. The sliding shaft 512 and the moving block 14 are arranged in a one-to-one correspondence. A connecting frame 513 is screwed between the end of the sliding shaft 512 away from the middle of the second circular plate 2 and the moving block 14. In this way, the movement of the moving block 14 is controlled by the movement of the sliding shaft 512; the end of the sliding shaft 512 close to the middle of the second circular plate 2 is fixedly connected to a trapezoidal movable block 514, and the trapezoidal movable block 514 is fixedly connected to the end of the sliding shaft 512 close to the middle of the second circular plate 2. 14 is an inclined surface at the downward end, and a through-hole 515 is provided in the trapezoidal movable block 514. An inclined propulsion block 516 is formed at the bottom of the through-hole 515, and the upper end of the inclined propulsion block 516 is also an inclined surface. Preferably, the inclined surface on the trapezoidal movable block 514 is parallel to the inclined surface on the inclined propulsion block 516; a driving shaft 517 is slidably installed in the middle of the second circular plate 2, and the driving shaft 517 slides through the second circular plate 2, and a frustum 518 is formed on the driving shaft 517. The frustum 518 is a frustum-shaped structure with a smaller diameter at the top and a larger diameter at the bottom. The frustum 518 and the trapezoidal movable block 514 are arranged in a corresponding manner. When the frustum 518 squeezes the trapezoidal movable block 514, , it can push the trapezoidal movable block 514 to move outward. In the initial state, there is a certain distance between the frustum 518 and the trapezoidal movable block 514. A plurality of pushing rods 519 are installed along the circumference of the upper end of the active shaft 517. The pushing rods 519 and the trapezoidal movable block 514 are arranged one-to-one. The lower end of the pushing rod 519 extends into the through-hole 515. Preferably, the lower end of the pushing rod 519 is an inclined surface and is parallel to the inclined surface on the inclined propulsion block 516. The pushing rod 519 and the inclined propulsion block 516 are arranged correspondingly. A push rod is installed in the middle of the third circular plate 3. The push rod is preferably a cylinder. The movable end of the push rod is connected to the bottom of the active shaft 517. In this way, The movement of the push rod controls the movement of the active shaft 517, thereby further driving the sliding shaft to move. Specifically, the workpiece stress detection includes two major detection directions, namely, inward expansion detection and outward contraction detection. When inward expansion detection is required, the push rod pushes the active shaft 517 upward, causing the frustum 518 on the active shaft 517 to move upward and squeeze the trapezoidal movable block 514, thereby causing the multiple trapezoidal movable blocks 514 to move outward and drive the sliding shaft 512 and the connecting frame 513 to move outward. The connecting frame 513 drives the moving block 14 to move outward, thereby moving the inner expansion sleeve 16 outward. In this way, the inner wall of the workpiece is squeezed by the inner expansion sleeve 16, thereby providing a basic pressure detection environment.When an outward retraction test is required, the push rod pushes the active shaft 517 downward, causing the push rod 519 on the active shaft 517 to also move downward and compress the inclined push block 516, thereby causing the multiple trapezoidal movable blocks 514 to move inward and drive the slide shaft 512 and the connecting frame 513 to move inward. The connecting frame 513 then drives the movable block 14 inward, causing the outward retraction sleeve 17 to move inward. In this way, the outward retraction sleeve 17 squeezes the outer wall of the workpiece. In summary, squeezing the inner or outer wall of the workpiece is achieved through a single structure. Moreover, compared with the motor-driven method in the reference document to control the synchronous inward or outward movement of the movable block 14, this method can make the force on the workpiece more direct, which obviously helps to apply pressure to the workpiece.

[0036] In another embodiment provided by the present invention, the transposition drive assembly 52 includes an I-shaped wheel 521 fixed on the rotating shaft 15, and the multiple I-shaped wheels 521 (corresponding to the inner expansion sleeve 16) near the middle of the first circular plate 1 are connected by a first transmission belt 522, and the multiple I-shaped wheels 521 (corresponding to the outer shrinkage sleeve 17) away from the middle of the first circular plate 1 are connected by a second transmission belt 523. The first transmission belt 522 and the second transmission belt 523 both have a certain degree of elasticity; a limit seat 524 is installed at the bottom of the first circular plate 1, and a sliding support plate 525 is slidably installed on the limit seat 524. The bottom of the first circular plate 1 is connected by a second transmission belt 523. The limiting spring rod 528 is connected to the connecting piece, and the movable end of the limiting spring rod 528 is connected to the sliding support plate 525. The limiting spring rod 528 is used to maintain the tension of the first transmission belt 522 and the second transmission belt 523. That is to say, the limiting spring rod 528 has a tendency to drive the sliding support plate 525 to move outward. Two servo motors 526 are installed at the bottom of the sliding support plate 525. The rotating end of the servo motor 526 is installed with a tensioning wheel 527. The tensioning wheel 527 close to the middle of the first circular plate 1 is in contact with the first transmission belt 522, and the tensioning wheel 527 away from the middle of the first circular plate 1 is in contact with the first transmission belt 522. The first and second transmission belts 522 and 523 are fitted on the second transmission belt 523. In this way, the servo motor 526 can drive the first transmission belt 522 or the second transmission belt 523 to rotate. At the same time, the tensioning degree of the first transmission belt 522 or the second transmission belt 523 can be kept at all times by the tensioning wheel 527. In addition, preferably, a circular plate (not shown in the figure) can be set at the lower end of the first transmission belt 522 and the second transmission belt 523 to prevent the first transmission belt 522 and the second transmission belt 523 from falling out. Specifically, when the internal expansion detection is required, the driving shaft 517 is pushed upward by the push rod, so that the moving block 14 and the I-shaped wheel 521 are moved upward. The first and second transmission belts 522 and 523 are both moved outward synchronously, thereby driving the first transmission belt 522 and the second transmission belt 523 to be tensioned. Under the action of the first and second transmission belts 522 and 523, the tensioning wheel 527 moves inward and drives the sliding support plate 525 to move inward on the limiting seat 524. The movement of the sliding support plate 525 drives the limiting spring rod 528 to be stretched. In this way, under the premise that the first and second transmission belts 522 and 523 are both moving, the tension of the first and second transmission belts 522 and 523 is maintained, which facilitates the outward movement of the inner expansion sleeve 16 and ensures that the inner expansion sleeve 16 can still rotate after the pressure is applied by the outward movement.When the outward retraction test is required, the driving shaft 517 is pushed downward by the push rod, so that the moving block 14 and the I-shaped wheel 521 are moved inward synchronously. At this time, the first transmission belt 522 and the second transmission belt 523 have a tendency to recover the relaxed state. However, under the elastic action of the limit spring rod 528, the sliding support plate 525 moves outward on the limit seat 524 and drives the tensioning wheel 527 to move outward. In this way, the first transmission belt 522 and the second transmission belt 523 are always kept in contact with the I-shaped wheel 521, maintaining the tension of the first transmission belt 522 and the second transmission belt 523. This facilitates the inward movement of the outer shrink sleeve 17, ensuring that the outer shrink sleeve 17 can rotate even after pressure is applied to the inward movement. Once pressure is applied, the servo motor 526 drives the tensioning pulley 527 to rotate, thereby driving the first transmission belt 522 or the second transmission belt 523 to move, and driving the I-shaped pulley 521 and the rotating shaft 15 to rotate, further ensuring that the inner expansion sleeve 16 or the outer shrink sleeve 17 can rotate even after movement. In summary, the above structure ensures that the movement of the moving block 14 does not affect the rotation of the inner expansion sleeve 16 or the outer shrink sleeve 17 while allowing annular members of different widths to move to their designated working positions.

[0037] Furthermore, during the pressure application process of the inner expansion sleeve 16 or the outer shrinkage sleeve 17, the inner expansion sleeve 16, the outer shrinkage sleeve 17 or the rotating shaft 15 are at risk of being damaged. Obviously, the inner expansion sleeve 16 or the outer shrinkage sleeve 17 is easier to replace. For this reason, the present embodiment further designs the pressure kit to protect the rotating shaft 15 and facilitate the replacement of the pressure kit. The inner diameter of the pressure kit is larger than the diameter of the rotating shaft 15. A buffer space 161 is provided between the pressure kit and the rotating shaft 15. A plurality of directional breaking grooves 162 are uniformly provided on the inner side wall of the pressure kit along its circumference. The directional breaking grooves 162 are preferably triangular in structure. A plurality of breaking blocks 163 corresponding to the directional breaking grooves 162 are formed on the rotating shaft 15. The breaking blocks 163 are also preferably triangular in structure. The breaking blocks 163 are vertically slidably installed in the directional breaking grooves 16 2, the breaking block 163 contacts the inner wall of the directional breaking groove 162; through the above arrangement, when the pressure kit needs to be replaced, it is only necessary to align the breaking block 163 with the directional breaking groove 162, and then push the pressure kit into the rotating shaft 15; when the applied pressure is too large and exceeds the bearing limit of the pressure kit, the breaking block 163 parallel to the force direction will squeeze the corresponding directional breaking groove 162, so that the pressure kit automatically breaks, and at the same time, the buffer space 161 also provides a buffering basis for the contact between the rotating shaft 15 and the pressure kit; in addition, the rotating shaft 15 drives the directional breaking groove 162 to move through the breaking block 163 and then drives the pressure kit to move. For this reason, the above-mentioned improvements to the rotating shaft 15 and the pressure kit have two functions, one is to facilitate the replacement of the pressure kit, and the other is to directionally break the pressure kit to reduce the impact on the rotating shaft 15.

[0038] Furthermore, although the design of the above-mentioned protection structure can reduce the impact on the rotating shaft 15, when the pressure kit is broken, the moving block 14 and the rotating shaft 15 still have a tendency to suddenly move in a certain direction, and it is possible that the rotating shaft 15 will collide with the workpiece after breaking the pressure kit, and the push rod may also be damaged. For this reason, further design is needed to protect the rotating shaft 15 and the push rod; in this embodiment, a two-way protection mechanism 6 is installed at one end of the moving block 14 near the middle of the first circular plate 1, and the two-way protection mechanism 6 includes two side plates 61 relatively fixed to the moving block 14 near the middle of the first circular plate 1, and a plurality of first arc-shaped grooves 62 are evenly opened at the lower end of the upper side plate 61, and a first driving block 63 is rotatably connected to the first arc-shaped groove 62 through a first pin shaft. The first driving block 63 is a square block structure, and a first torsion spring (not shown in the figure) is connected between the first driving block 63 and the first pin shaft. In the initial state, under the elastic action of the first torsion spring, the first driving block 63 is in a vertical state. In addition, A first stopper 64 is also fixed in the first arc groove 62. The first stopper 64 is a square structure, and the first stopper 64 is attached to the outer end (away from the middle of the first circular plate 1) of the first driving block 63 in the vertical state; in addition, a plurality of second arc grooves 65 are evenly opened on the upper end of the side plate 61 on the lower side, and a second driving block 66 is rotatably connected to the second arc groove 65 through a second pin shaft. The second driving block 66 is also a square block structure, and a second pin shaft is connected between the second driving block 66 and the second pin shaft. A torsion spring (not shown in the figure) is provided. In the initial state, under the elastic action of the second torsion spring, the second driving block 66 is in a vertical state. In addition, a second stopper 67 is fixed in the second arc-shaped groove 65. The second stopper 67 has a square structure. It is particularly important to note that, unlike the aforementioned first stopper 64, the second stopper 67 is attached to the inner end of the second driving block 66 in the vertical state (close to the middle of the first circular plate 1). The first driving block 63 and the second driving block 66 can both be regarded as tooth blocks on the rack.The bidirectional protection mechanism 6 also includes a circular frame 68 installed in the lower end of the first circular plate 1. The circular frame 68 is arranged vertically. A cylindrical working chamber 69 is opened in the circular frame 68. The central axis of the working chamber 69 coincides with the central axis of the circular frame 68. A connecting shaft 70 is rotated through the middle of the circular frame 68. A limiting gear 71 is fixed to one end of the connecting shaft 70 located outside the circular frame 68. The limiting gear 71 is arranged between the two side plates 61. The ends of the first driving block 63 and the second driving block 66 that are close to each other can contact the limiting gear 71. The first driving block 63 and the second driving block 66 are in contact with the limiting gear 71. The driving block 66 and the limiting gear 71 are arranged in a corresponding manner, and the tooth block on the limiting gear 71 can be regarded as meshing with the first driving block 63 and the second driving block 66 respectively. When the moving block 14 moves inward normally (to limit and correct the workpiece), the first driving block 63 is blocked by the first stopper 64. The spacing between the first stoppers 64 is just enough to drive the limiting gear 71 to rotate counterclockwise continuously (based on the direction shown in the figure). At this time, the second stopper 67 is squeezed outward by the limiting gear 71 to make way, and the second torsion spring also works at the same time; when the moving block 14 moves outward When the second drive block 66 is blocked by the second stopper 67, the spacing between the second stoppers 67 is just enough to drive the limiting gear 71 to rotate continuously clockwise (based on the direction shown in the figure). At this time, the first stopper 64 is squeezed inward by the limiting gear 71 to make way, and the first torsion spring also works at the same time. In addition, a rotating disk 72 is fixed to one end of the connecting shaft 70 located in the working chamber 69. A plurality of receiving grooves 73 are opened on the side wall of the rotating disk 72 in the circumferential direction. A blocking block 74 is installed in the accommodating groove 73 through a blocking spring. The blocking has a certain mass. Under the elastic action of the spring, the locking block 74 maintains a certain distance from the inner wall of the working chamber 69 during normal operation (limiting and correcting the work or applying normal pressure). The side wall of the working chamber 69 is provided with a plurality of locking grooves 75 corresponding one to one with the receiving grooves 73. The locking block 74 is preferably a cylindrical structure, and the locking grooves 75 are slightly larger than the locking block 74. The locking block 74 and the locking grooves 75 are arranged in a corresponding manner. When the rotating disk 72 rotates rapidly, the locking block 74 will pop out and lock into the locking grooves 75 under the action of centrifugal force, thereby stopping the rotation of the rotating disk 72.

[0039] When the outer retraction detection is performed, the outer retraction sleeve 17 is damaged or under other extreme conditions, the moving block 14 moves inward quickly. At this time, the side plate 61 also moves inward quickly, and the limiting gear 71 is driven to rotate quickly by the first driving block 63, and the connecting shaft 70 and the rotating disk 72 are also driven to rotate quickly by the limiting gear 71. Under the action of centrifugal force, the locking block 74 quickly pops out the tension locking spring and is locked in the locking groove 75, thus stopping the rapid rotation of the connecting shaft 70 and the rotating disk 72, thereby stopping the rapid rotation of the limiting gear. At this time, the movement of the first driving block 63 is also stopped, thereby blocking the rapid inward movement of the moving block 14, further protecting the rotating shaft 15 and the push rod. By the same token, when there is a problem with the inner expansion detection, When the moving block 14 moves outward quickly, it will also drive the limiting gear 71 to rotate quickly, thereby causing the blocking block 74 to pop out quickly and get stuck in the blocking groove 75. The movement of the connecting shaft 70, the rotating disk 72, the second driving block 66 and the side plate 61 will also be stopped, thereby blocking the rapid outward movement of the moving block 14; in summary, through the above-mentioned two-way protection mechanism 6, whether the moving block 14 moves inward quickly or outward quickly, the movement of the moving block 14 can be stopped in time, thereby protecting the rotating shaft 15 and the push rod, and the above-mentioned two-way protection mechanism 6 only uses one set of structure to achieve passive protection in two directions, which not only saves working space, but also is passively triggered, thereby improving the reliability and utilization rate of the mechanism.

[0040] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A titanium workpiece stress detection device, comprising a first circular plate, wherein a plurality of limiting grooves are uniformly formed on the first circular plate along its circumference, wherein a moving block is slidably installed in the limiting groove, characterized in that: Two rotating shafts are rotatably mounted on the movable block, the upper ends of the rotating shafts pass through a limiting slot, an inner expansion sleeve is provided on the rotating shaft near the middle of the first circular plate, and an outer contraction sleeve is provided on the rotating shaft away from the middle of the first circular plate. The movable block also includes a driving mechanism, which can drive the rotating shafts to rotate synchronously to switch the stress detection position of the workpiece.

2. A titanium metal workpiece stress detection device according to claim 1, characterized in that: It also includes a second circular plate and a third circular plate arranged in sequence along the vertical direction, the first circular plate is located above the second circular plate, the first circular plate, the second circular plate and the third circular plate are connected by a support column, and the first circular plate, the second circular plate and the third circular plate are coaxial.

3. The titanium workpiece stress detection device according to claim 2, characterized in that: A plurality of detection heads are axially arranged on the upper end of the first circular plate.

4. The titanium workpiece stress detection device according to claim 2, characterized in that: The driving mechanism includes a pressure driving component for driving the moving block to slide along the limiting groove, and also includes a position conversion driving component for driving the rotating shaft to rotate.

5. The titanium workpiece stress detection device according to claim 4, characterized in that: The pressure driving assembly includes a plurality of limit frames circumferentially mounted on the second circular plate, a sliding shaft is slidably mounted on the limit frame, the sliding shaft and the movable plate are arranged in a one-to-one correspondence, and a connecting frame is screwed between the end of the sliding shaft away from the middle of the second circular plate and the movable plate.

6. The titanium workpiece stress detection device according to claim 5, characterized in that: A trapezoidal movable block is fixedly connected to one end of the sliding shaft close to the middle of the second circular plate, and the downward end of the trapezoidal movable block is an inclined surface. A through opening is opened in the trapezoidal movable block, and an inclined propulsion block is formed at the bottom of the through opening. The upper end of the inclined propulsion block is also an inclined surface.

7. The titanium workpiece stress detection device according to claim 6, characterized in that: A driving shaft is slidably installed in the middle of the second circular plate, and a truncated cone portion is formed on the driving shaft. The truncated cone portion and the trapezoidal movable block are arranged in correspondence with each other. A plurality of pushing rods are installed along the circumference of the upper end of the driving shaft. The pushing rods extend into the through-hole, and the pushing rods and the inclined propulsion block are arranged in correspondence with each other. A push rod is installed in the middle of the third circular plate, and the movable end of the push rod is connected to the bottom of the driving shaft.

8. The titanium workpiece stress detection device according to claim 4, characterized in that: The transposition drive assembly includes an I-shaped wheel fixed on the rotating shaft. The multiple I-shaped wheels close to the middle of the first circular plate are connected by a first transmission belt, and the multiple I-shaped wheels away from the middle of the first circular plate are connected by a second transmission belt.

9. The titanium metal workpiece stress detection device according to claim 8, characterized in that: A limiting seat is installed at the bottom of the first circular plate, and a sliding support plate is slidably installed on the limiting seat. The bottom of the first circular plate is connected to a limiting spring rod through a connecting piece, and the movable end of the limiting spring rod is connected to the sliding support plate. Two servo motors are installed at the bottom of the sliding support plate, and a tensioning wheel is installed at the rotating end of the servo motor. The tensioning wheel close to the middle of the first circular plate is attached to the first transmission belt, and the tensioning wheel away from the middle of the first circular plate is attached to the second transmission belt.

10. The titanium metal workpiece stress detection device according to claim 1, characterized in that: The distance between the inner expansion sleeve and the outer shrinkage sleeve is greater than the actual width of the workpiece.

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