A clamping device for blade-type workpieces

Abstract

This invention relates to a blade-type workpiece clamping device, comprising a base, a supporting mechanism, and a limiting mechanism. The base has a receiving space; the supporting mechanism is disposed within the receiving space; the limiting mechanism includes an axial limiting mechanism and a circumferential limiting mechanism, which are respectively disposed on the base; axial limiting mechanisms are respectively disposed on both sides of the receiving space, and the structure of at least one axial limiting mechanism for abutting the workpiece is adjustable in position along the direction approaching or moving away from the workpiece; circumferential limiting mechanisms are respectively disposed at both ends of the receiving space, and the structure of at least one circumferential limiting mechanism for abutting the workpiece is adjustable in position along the direction approaching or moving away from the workpiece. Compared with the prior art, the blade-type workpiece clamping device of this invention can ensure that the workpiece is in the same position each time it is placed on the clamping fixture, reducing or even eliminating manual calibration, lowering labor intensity, and improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of auxiliary tooling and fixture technology, and in particular to a clamping device for blade-type workpieces. Background Technology

[0002] The compressor is one of the core components of a gas turbine or steam turbine system. Internally, it consists of multiple stages of alternating stationary and moving blades forming an airflow channel. The stationary blades, as the stationary components of the compressor, are a series of blades forming a flow channel structure, primarily used to guide and compress gas. To further improve aerodynamic performance, sandblasting is often used to treat the surface of the stationary blades, forming a controllable, rough but regularly reinforced layer. This reinforced layer effectively improves airflow adhesion and reduces flow losses; simultaneously, surface strengthening significantly enhances the blades' resistance to foreign object damage and high-cycle fatigue life. Therefore, the quality of the sandblasting treatment of the stationary blades directly affects the aerodynamic stability and overall operating efficiency of the compressor, and is a crucial fundamental process for ensuring the long-term reliable operation of power generation equipment.

[0003] Currently, traditional mechanical fixtures are commonly used to position and clamp the workpieces when sandblasting compressor stator vanes. However, existing fixtures generally suffer from simple structural designs, lack of flexible adjustment capabilities, and poor clamping accuracy. In actual production, because the fixtures cannot guarantee that stator vane units of the same stage are in a consistent position after each clamping, operators must manually calibrate each workpiece to correct positional deviations before using automated sandblasting equipment (such as sandblasting robots). This manual intervention not only increases the complexity of the process and the labor intensity of operators but also seriously affects production efficiency, making it difficult to meet the demands of large-volume, high-efficiency production.

[0004] Therefore, how to provide a clamping fixture to reduce manual calibration and improve production efficiency has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a blade-type workpiece clamping device. The structure for limiting the workpiece includes a circumferential limiting component and an axial limiting component. When the workpiece is loaded into the clamping fixture, the circumferential and axial limiting components respectively limit the workpiece in different directions, ensuring accurate workpiece positioning and guaranteeing that the workpiece is always in the same orientation when placed on the clamping fixture. This reduces or even eliminates manual calibration, lowers labor intensity, and improves production efficiency, better meeting the needs of large-volume, high-efficiency production.

[0006] A blade-type workpiece clamping device includes a base, a bearing mechanism, and a limiting mechanism; The base is provided with a receiving space; The supporting mechanism is disposed in the receiving space to support the workpiece; The limiting mechanism includes an axial limiting mechanism and a circumferential limiting mechanism, which are respectively disposed on the base; The axial limiting mechanism is provided on both sides of the accommodating space. The axial limiting mechanism is used to abut against the end face of the workpiece in the axial direction, and the structure of at least one of the axial limiting mechanisms used to abut against the workpiece can be adjusted in position along the direction of approaching or moving away from the workpiece. The circumferential limiting mechanism is provided at both ends of the accommodating space. The circumferential limiting mechanism is used to abut against the end face of the workpiece in the radial direction to restrict the workpiece from rotating in the circumferential direction. Moreover, the structure of at least one of the circumferential limiting mechanisms used to abut against the workpiece can be adjusted in position along the direction of approaching or moving away from the workpiece.

[0007] Preferably, the base includes a base plate and a mounting plate disposed on the base plate; The mounting plate is provided in two sets, and the two sets of mounting plates are spaced apart from each other and face each other along the width direction of the base plate, and the accommodating space is located between the two sets of mounting plates; The bearing mechanism and the limiting mechanism are mounted on the mounting plate.

[0008] Preferably, the mounting plate includes two vertical plates, which are spaced apart and mirror-distributed along the length of the base plate; The height of the near end of the vertical plate is lower than the height of the far end, and the top surface of the vertical plate is at least partially curved.

[0009] Preferably, the vertical plate is provided with a mounting groove for mounting the circumferential limiting mechanism, a first mounting hole for mounting the axial limiting mechanism, and a second mounting hole for mounting the bearing mechanism; The mounting groove is recessed from the inner surface of the vertical plate and does not penetrate the vertical plate.

[0010] Preferably, at least two supporting mechanisms are provided along the length of the base plate, and the two supporting mechanisms have different heights.

[0011] Preferably, the portion of the bearing mechanism that contacts the workpiece is rotatably configured.

[0012] Preferably, the axial limiting mechanism includes a wedge, a pressure block, and a sealing plate; The wedge is disposed on the mounting plate, and the wedge is provided with a slope for axial positioning of the workpiece; The pressure block is located between the two vertical plates of the mounting plate and is used to axially abut against the axial end face of the workpiece. The sealing plate is located on the mounting plate and is used to press and adhere to the surface of the workpiece to protect the non-sandblasted surface of the workpiece; Both the pressure block and the sealing plate are movable along the width direction of the base plate, and the pressure block is located inside the sealing plate; A locking block is also provided on the outer side of the sealing plate. The locking block can move along the width direction of the base plate to press the sealing plate and the pressure block onto the surface of the workpiece.

[0013] Preferably, the locking block is threadedly connected to the mounting plate by bolts.

[0014] Preferably, the circumferential limiting mechanism includes a base block, a connecting rod, and a stop block; The base block is mounted on the mounting plate; The connecting rod is connected to the base block, and a ball is provided at one end of the connecting rod; The stop block is provided with a spherical cavity adapted to the ball, and the stop block is rotatably mounted on the ball through the spherical cavity. The stop block is used to abut against the workpiece.

[0015] Preferably, the circumferential limiting mechanism located at both ends of the accommodating space is divided into a fixed circumferential limiting mechanism and a dynamic circumferential limiting mechanism; The connecting rod in the dynamic circumferential limiting mechanism passes through the base block, the connecting rod is threadedly connected to the base block, and the end of the connecting rod away from the ball is provided with a tool mounting hole.

[0016] Preferably, it also includes a sand shield, which is disposed on the outside of the circumferential limiting mechanism.

[0017] Compared with the prior art, the blade-type workpiece clamping device provided by the present invention is equipped with a bearing mechanism and a limiting mechanism. When the workpiece is loaded, the bearing mechanism can support the workpiece, and the limiting mechanism can limit the workpiece. Furthermore, axial limiting mechanisms are respectively provided on both sides of the accommodating space, and circumferential limiting mechanisms are respectively provided at both ends of the accommodating space. Thus, the axial and circumferential limiting mechanisms can limit the four surfaces of the workpiece. In addition, the structure for abutting the workpiece in at least one axial limiting mechanism can be adjusted in position along the direction approaching or away from the workpiece, and the structure for abutting the workpiece in at least one circumferential limiting mechanism can be adjusted in position along the direction approaching or away from the workpiece. This ensures that each axial and circumferential limiting mechanism can stably abut against the workpiece, thereby ensuring the accuracy of the workpiece position and guaranteeing that the workpiece is in the same posture each time it is placed on the clamping fixture. This reduces or even eliminates manual calibration, lowers labor intensity, and improves production efficiency, better meeting the needs of large-scale, high-efficiency production. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural diagram of a blade-type workpiece clamping device after clamping a workpiece, according to one embodiment; Figure 2 for Figure 1 The front view of the structure shown; Figure 3 A three-dimensional structural diagram of a base plate provided in one embodiment; Figure 4 A three-dimensional structural diagram of a vertical plate provided in one embodiment; Figure 5 A three-dimensional structural schematic diagram of a support mechanism provided in one embodiment; Figure 6 A three-dimensional structural diagram of the base and axial limiting structure provided in one embodiment; Figure 7 A three-dimensional structural schematic diagram of a circumferential limiting mechanism provided in one embodiment; Figure 8 This is a three-dimensional structural diagram of a dynamic circumferential limiting mechanism provided in one embodiment. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that when an element is referred to as "set on", "fixed on", or "set on" another element, it can be directly on or indirectly set on another element; when an element is referred to as "connected to" another element, it can be directly connected to or indirectly connected to another element.

[0022] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0023] The blade-type workpiece clamping device provided by this invention includes a bearing mechanism and a limiting mechanism. When the workpiece is loaded, the bearing mechanism supports the workpiece, and the limiting mechanism limits its position. Furthermore, axial limiting mechanisms are provided on both sides of the accommodating space, and circumferential limiting mechanisms are provided at both ends of the accommodating space. This allows the four surfaces of the workpiece to be limited by the axial and circumferential limiting mechanisms. Additionally, the structure in at least one axial limiting mechanism that abuts the workpiece can be adjusted in position along the direction approaching or moving away from the workpiece, and the structure in at least one circumferential limiting mechanism can also be adjusted in position along the direction approaching or moving away from the workpiece. This ensures stable contact between each axial and circumferential limiting mechanism and the workpiece, guaranteeing accurate workpiece positioning and ensuring the workpiece is always in the same orientation when placed on the clamping fixture. This reduces or even eliminates manual calibration, lowers labor intensity, and improves production efficiency, better meeting the needs of high-volume, high-efficiency production.

[0024] Please refer to the following: Figures 1 to 8In one embodiment, a blade-type workpiece clamping device 100 is provided, which is mainly used to clamp the workpiece during high-temperature sandblasting of the blade-type workpiece, ensuring that the workpiece is in a consistent position after each clamping, reducing or even avoiding manual calibration. Specifically, in one embodiment, the blade-type workpiece is a stator vane unit 200 used in a compressor, and multiple stator vane units 200 can form a stator vane ring. More specifically, the blade-type workpiece clamping device 100 is used to clamp the outer ring 210 of the stator vane unit 200, and to perform flexible positioning and clamping of the outer ring 210.

[0025] The blade-type workpiece clamping device 100 includes a base 10, a bearing mechanism 20, and a limiting mechanism 30. The base 10 is mainly used to support various components and serve as a mounting base for each component. The base 10 is also used to cooperate with downstream workstations. The bearing mechanism 20 is mainly used to support and guide the workpiece. The limiting mechanism 30 is mainly used to limit the workpiece to ensure accurate workpiece position and posture.

[0026] The base 10 has a receiving space 11, and the bearing mechanism 20 is disposed in the receiving space 11. The limiting mechanism 30 includes an axial limiting mechanism 31 and a circumferential limiting mechanism 32, which are respectively disposed on the base 10.

[0027] The accommodating space 11 is provided with axial limiting mechanisms 31 on both sides, and the axial limiting mechanisms 31 are used to abut against the end faces of the workpiece in the axial direction. That is, at least two axial limiting mechanisms 31 are provided, and the two axial limiting mechanisms 31 are located on opposite sides of the accommodating space 11, so that the two end faces of the workpiece in the axial direction can be abutted by the two axial limiting mechanisms 31. Here, the two sides of the accommodating space 11 refer to the position area of ​​the two opposite ends of the accommodating space 11 in one direction; while the two ends of the accommodating space 11 refer to the position area of ​​the two opposite ends of the accommodating space 11 in another direction (perpendicular to the direction indicated by the two sides). For example, as Figure 1 As shown, the two sides of the receiving space 11 refer to the position areas of the lower left and upper right ends of the receiving space 11, while the two ends of the receiving space 11 refer to the position areas of the upper left and lower right ends of the receiving space 11. At least one of the structures in the axial limiting mechanism 31 used to abut the workpiece can be adjusted in position along the direction closer to or further away from the workpiece. That is, the position of the abutting structure in at least one of the axial limiting mechanisms 31 is adjustable.

[0028] The circumferential limiting mechanism 32 is provided at both ends of the receiving space 11. The circumferential limiting mechanism 32 is used to abut against the radial end face of the workpiece. That is, at least two circumferential limiting mechanisms 32 are provided, and the two circumferential limiting mechanisms 32 are located at opposite ends of the receiving space 11, so that the two radial end faces of the workpiece can be abutted by the two circumferential limiting mechanisms 32 to restrict the workpiece from rotating circumferentially. The structure of at least one circumferential limiting mechanism 32 that abuts against the workpiece can be adjusted in the direction of approaching or moving away from the workpiece. That is, the position of the abutting structure in at least one circumferential limiting mechanism 32 is adjustable.

[0029] The blade-type workpiece clamping device 100 is provided with an axial limiting mechanism 31 and a circumferential limiting mechanism 32 on both sides and at both ends of the accommodating space 11, respectively. The axial limiting mechanism 31 and the circumferential limiting mechanism 32 can limit the four surfaces of the workpiece. Furthermore, since the structure of at least one axial limiting mechanism 31 and at least one circumferential limiting mechanism 32 that abuts the workpiece is adjustable, after the workpiece is loaded, the axial limiting mechanism 31 and the circumferential limiting mechanism 32 can be adjusted to ensure stable contact of the four surfaces of the workpiece, thereby ensuring accurate workpiece positioning. This reduces or even eliminates manual calibration, lowers labor intensity, and improves production efficiency, better meeting the needs of large-volume, high-efficiency production. Additionally, the adjustable positions of the structures of the axial limiting mechanism 31 and the circumferential limiting mechanism 32 that abut the workpiece also allow for clamping workpieces of similar sizes, improving versatility.

[0030] Specifically, in one embodiment, the base 10 includes a base plate 12 and a mounting plate 13 disposed on the base plate 12. Two sets of mounting plates 13 are provided, spaced apart from each other and facing each other along the width direction of the base plate 12, with the accommodating space 11 located between the two sets of mounting plates 13. The bearing mechanism 20 and the limiting mechanism 30 are disposed on the mounting plate 13. The base plate 12 is the base plate of the blade-type workpiece clamping device 100, used to support various components and cooperate with downstream workstations. The mounting plate 13 is the base plate for assembling the bearing mechanism 20 and the limiting mechanism 30. The length direction of the base plate 12 is as follows... Figure 3 As shown in the X direction, the width direction of the base plate 12 is as follows: Figure 3 Y direction shown.

[0031] Specifically, in one embodiment, the base plate 12 has a rectangular structure and is a rectangular plate. More specifically, in one embodiment, the base plate 12 is made of stainless steel and is a rectangular stainless steel plate.

[0032] Preferably, in one embodiment, the base plate 12 is provided with a positioning hole 121, which is adapted to the structure of the transfer platform in the sandblasting workshop, thereby facilitating the positioning of the base plate 12 on the transfer platform in the sandblasting workshop.

[0033] Furthermore, the base plate 12 is also provided with a set of mounting holes 122 for mounting the mounting plate 13. The set of mounting holes 122 is provided with positioning pin holes and bolt countersunk holes, so that the mounting plate 13 can be quickly positioned onto the base plate 12 by positioning pins and fixed by bolts. Specifically, in one embodiment, the set of mounting holes 122 is provided with four sets, which can be adapted to install the four vertical plates in the mounting plate 13.

[0034] Furthermore, the base plate 12 is also provided with a nameplate mounting threaded hole 123, which is mainly used for attaching the nameplate of the blade-type workpiece clamping device 100.

[0035] Preferably, in one embodiment, the mounting plate 13 includes two vertical plates 131, which are spaced apart and mirror-distributed along the length of the base plate 12. The height of the proximal end of each vertical plate 131 is lower than the height of its distal end, and the top surface of each vertical plate 131 is at least partially curved. The proximal end of a vertical plate 131 refers to the end of the vertical plate 131 that is relatively close to the other vertical plate 131 along the length of the base plate 12; similarly, the distal end of a vertical plate 131 refers to the end of the vertical plate 131 that is relatively far from the other vertical plate 131 along the length of the base plate 12. In other words, when the mounting plate 13 is assembled, when viewed from the front, the mounting plate 13 presents a crescent-shaped structure with high ends and a concave middle, which can better fit the stationary blade grid unit 200 for use, and follow the arc shape of the stationary blade grid unit 200 to a greater extent, which can better ensure that the blade-type workpiece clamping device 100 will not block the surface of the stationary blade grid unit 200 that needs to be sandblasted.

[0036] Specifically, in one embodiment, each set of mounting plates 13 includes two vertical plates 131, and the blade-type workpiece clamping device 100 is provided with a total of four vertical plates 131. The four vertical plates 131 face each other in pairs along the width direction of the base plate 12 and are distributed in a mirror image along the length direction of the base plate 12.

[0037] More specifically, the vertical plate 131 is fixed to the base plate 12 by bolts.

[0038] Preferably, in one embodiment, the vertical plate 131 is provided with a mounting groove 1312 for mounting the circumferential limiting mechanism 32, a first mounting hole 1313 for mounting the axial limiting mechanism 31, and a second mounting hole 1314 for mounting the bearing mechanism 20. That is, the vertical plate 131 has an external structure for cooperating with the circumferential limiting mechanism 32, the axial limiting mechanism 31, and the bearing mechanism 20, so that the circumferential limiting mechanism 32, the axial limiting mechanism 31, and the bearing mechanism 20 can be mounted on the vertical plate 131. The mounting groove 1312 is recessed from the inner surface of the vertical plate 131 (the surface near the receiving space 11), and the mounting groove 1312 does not penetrate the vertical plate 131. In other words, the mounting groove 1312 is not a through groove. When machining the mounting groove 1312, it is not milled through. A thin wall is left on the outside of the mounting groove 1312 to prevent sand particles from entering the blade-type workpiece clamping device 100.

[0039] Specifically, in one embodiment, the mounting groove 1312 is located at the higher end of the vertical plate 131. More specifically, in one embodiment, the mounting groove 1312 is an irregularly shaped groove. That is, the mounting groove 1312 has an irregular structure and can have multiple mounting points, allowing the supporting mechanism 20 to be installed in different positions according to actual needs. It is understood that in actual production, workpieces of the same grade may have two different sizes, one large and one small. To avoid processing two different sizes of the vertical plate 131, resulting in resource waste; and also to avoid operators repeatedly changing the vertical plate 131 when working with different workpieces, leading to cumbersome operation; therefore, this embodiment chooses to use the same vertical plate 131. By opening an irregularly shaped groove on the vertical plate 131, the installation position of the supporting mechanism 20 can be changed without replacing the vertical plate 131.

[0040] Specifically, in one embodiment, the first mounting hole 1313 is a threaded hole, and the first mounting hole 1313 is provided in two rows, so that different components on the axial limiting mechanism 31 can be installed through the first mounting holes 1313 on different rows. More specifically, the two rows of first mounting holes 1313 have different hole diameter types.

[0041] Specifically, in one embodiment, the second mounting holes 1314 on two vertical plates 131 within the same set of mounting plates 13 have a horizontal height difference. That is, the horizontal height of the second mounting hole 1314 on one vertical plate 131 is higher than the horizontal height of the second mounting hole 1314 on the other vertical plate 131. Therefore, when the two supporting mechanisms 20 are correspondingly installed on these two mounting plates 13, a height difference will be formed between the two supporting mechanisms 20.

[0042] Specifically, in one embodiment, each of the vertical plates 131 is provided with only one second mounting hole 1314.

[0043] Specifically, in one embodiment, a notch 1315 is provided at the bottom of the near end of the vertical plate 131. The notch 1315 is mainly used to cooperate with the components in the axial limiting mechanism 31 to restrict the components in the axial limiting mechanism 31.

[0044] Preferably, in one embodiment, at least two supporting mechanisms 20 are provided along the length direction of the base plate 12, and the two supporting mechanisms 20 have different horizontal heights. Because of the height difference between the two supporting mechanisms 20 in the horizontal direction, when a workpiece is supported by the two supporting mechanisms 20, the supporting mechanisms 20 can guide the workpiece into a predetermined posture.

[0045] Specifically, in one embodiment, only two support mechanisms 20 are provided, with one support mechanism 20 installed on each of the two opposite vertical plates 131 of the mounting plate 13.

[0046] Preferably, in one embodiment, the portion of the bearing mechanism 20 that contacts the workpiece is rotatably configured so that when the bearing mechanism 20 contacts the workpiece, the wear on the workpiece surface can be reduced by the rotation of its own structure.

[0047] Specifically, in one embodiment, the bearing mechanism 20 is a roller-type structure. The bearing mechanism 20 includes a roller shaft 21 and a sleeve 22 rotatably mounted on the roller shaft 21, the sleeve 22 being used to contact the workpiece. More specifically, the bearing mechanism 20 also includes bearing retaining rings 23 and bearings 24. The sleeve 22 is mounted on the roller shaft 21 via the bearings 24, thereby achieving a rotatable connection between the sleeve 22 and the roller shaft 21. The bearing retaining rings 23 are mainly used to axially limit the bearings 24 and the sleeve 22. Specifically, the roller shaft 21 is a stepped shaft, with both ends connected to the second mounting holes 1314 of the vertical plates 131 on both sides via shoulders. The roller shaft 21 has symmetrical slots for assembling the two bearing retaining rings 23. The two bearings 24 are axially positioned by the two bearing retaining rings 23 and the shoulders of the roller shaft 21. The sleeve 22 is a circular tube with a step in the middle, and it is mounted on the roller shaft 21 via the bearing 24. This design allows the sleeve 22 to rotate while the roller shaft 21 remains fixed, facilitating the placement of the workpiece on the bearing mechanism 20. Due to the height difference between the two roller shafts 21 in the horizontal direction, the workpiece is supported and guided into a predetermined posture.

[0048] Specifically, in one embodiment, only two sets of the axial limiting mechanism 31 and only two sets of the circumferential limiting mechanism 32 are provided.

[0049] The axial limiting mechanism 31 is used to ensure the parallelism between the two axial end faces of the workpiece and the long side of the blade-type workpiece clamping device 100, and at the same time prevent the workpiece from jumping out of the fixture.

[0050] Preferably, in one embodiment, the axial limiting mechanism 31 includes a wedge 311, a pressure block 312, a sealing plate 313, and a locking block 314. The wedge 311 is disposed on the mounting plate 13, and the wedge 311 has a slope 3111 for axially positioning the workpiece. The pressure block 312 is located between two vertical plates 131 of the mounting plate 13, and is used to axially abut against and limit the axial end face of the workpiece. The sealing plate 313 is located on the mounting plate 13, and is used to press and adhere to the surface of the workpiece to protect the non-sandblasted surface of the workpiece. Both the pressure block 312 and the sealing plate 313 are movable along the width direction of the base plate 12, and the pressure block 312 is located inside the sealing plate 313. The locking block 314 is provided on the outer side of the sealing plate 313. The locking block 314 can move along the width direction of the base plate 12 to press the sealing plate 313 and the pressure block 312 against the surface of the workpiece. That is, in this embodiment, after the workpiece is loaded, the axial limiting mechanism 31 can first perform initial axial positioning of the workpiece by the slope 3111 on the wedge block 311. Then, the operator can drive the sealing plate 313 and the pressure block 312 to move by manipulating the locking block 314, thereby pressing the axial surface of the workpiece against the surface.

[0051] Specifically, in one embodiment, each set of axial limiting mechanisms 31 includes two wedges 311, one pressure block 312, one sealing plate 313, and two locking blocks 314. That is, the two sets of axial limiting mechanisms 31 have a total of four wedges 311 and four locking blocks 314. One wedge 311 is bolted to one vertical plate 131 (specifically, it can be installed at the first mounting hole 1313 in the row on the vertical plate 131), and the four wedges 311 correspond one-to-one with the four vertical plates 131; one locking block 314 is bolted to one vertical plate 131 (specifically, it can be installed at the first mounting hole 1313 in the other row on the vertical plate 131), and the four locking blocks 314 correspond one-to-one with the four vertical plates 131.

[0052] Preferably, in one embodiment, the locking block 314 is threadedly connected to the mounting plate 13 by bolts (specifically to the first mounting hole 1313 on the vertical plate 131), so that the operator can move the locking block 314 by turning the bolts, thereby tightening the sealing plate 313 and the pressure block 312.

[0053] Specifically, the wedge 311 is a rectangular block with a slope 3111 at the top, and there are four wedges in total. Each wedge 311 is bolted to a vertical plate 131. When the workpiece is placed on the bearing mechanism 20 from top to bottom, the slope 3111 on the two sides of the wedges 311 will press the two axial end faces of the workpiece for initial axial positioning under the action of the workpiece's own weight. The pressure block 312 is a structure with low ends and a convex middle when viewed from the front. There are two pressure blocks, one between the two vertical plates 131. The two ends of the pressure block 312 are pressed and limited by the two vertical plates 131 in a set of mounting plates 13 (specifically, the end of the pressure block 312 extends into the notch 1315). There is an arc protrusion on one side of the middle, which can fit against the two axial end faces of the workpiece, completely restricting the workpiece's axial freedom. The sealing plate 313 is a combined welded component consisting of two pieces. The sealing plate 313 includes a first plate 3131 and a second plate 3132 bent inwards from the top of the first plate 3131. The second plate 3132 has an overall arc-shaped structure, allowing it to better fit the stationary blade unit 200 and conform to its arc shape to a greater extent. The second plate 3132 has a gap in the middle to avoid obstructing the pressure block 312. The first plate 3131 is located outside the vertical plate 131 and the pressure block 312, and partially inside the locking block 314, to transmit force and protect the workpiece, preventing sand particles from damaging the non-sandblasted surface of the workpiece during sandblasting. The locking block 314 is a rectangular block with two countersunk holes and a notch that mates with the sealing plate 313. One end of the locking block 314 extends into a pressing block for pressing and restricting the first plate 3131, so that when the locking block 314 moves inward, it can clamp the sealing plate 313 inward. The locking block 314 is connected to the vertical plate 131 by bolts. During the engagement of the bolts with the vertical plate 131, the sealing plate 313 is clamped by the locking block 314 and the vertical plate 131, and the force transmitted from the sealing plate 313 to the pressure block 312 is then transmitted to the workpiece, thus completing the axial unilateral end face limitation of the workpiece. The other end face is treated similarly.

[0054] Since the wedge 311 is bolted to the vertical plate 131, it can be disassembled as needed. Furthermore, the wedge 311 comes in various models with different widths. Depending on the workpiece to be clamped, different models of wedge 311 can be installed on the vertical plate 131. For example, to enable the blade-type workpiece clamping device 100 to accommodate blades with similar axial widths, wedges 311 of different widths can be replaced to axially restrict the blades, thereby improving versatility. When the required blade width is wide, the four wedges 311 can be replaced with narrower models; conversely, when the required blade width is narrow, the four wedges 311 can be replaced with wider models.

[0055] The circumferential limiting mechanism 32 is mainly used to limit the circumferential rolling of the workpiece. The circumferential limiting mechanism 32 is used to resist the rotation tendency of the two radial end faces of the workpiece, so that the workpiece and the limiting mechanism 30 always maintain surface contact, avoid point and line contact to scratch the surface of the workpiece, and ensure that the same level stationary blade unit 200 is in the same position each time it is placed on the tooling.

[0056] Preferably, in one embodiment, the circumferential limiting mechanism 32 includes a base block 321, a connecting rod 322, and a stop block 323. The base block 321 is disposed on the mounting plate 13. The connecting rod 322 is connected to the base block 321, and one end of the connecting rod 322 is provided with a ball 3221. The stop block 323 is provided with a spherical cavity adapted to the ball 3221. The stop block 323 is rotatably disposed on the ball 3221 through the spherical cavity, and the stop block 323 is used to abut against the workpiece. Through this structural design, the stop block 323 can rotate within a certain range on the connecting rod 322, thereby ensuring that the workpiece and the stop block 323 always maintain surface contact.

[0057] Preferably, in one embodiment, the circumferential limiting mechanisms 32 located at both ends of the accommodating space 11 are divided into a fixed circumferential limiting mechanism 3201 and a movable circumferential limiting mechanism 3202. The movable circumferential limiting mechanism 3202 may have multiple mounting positions on the mounting plate 13, thereby allowing dynamic adjustment of its specific position. The movable circumferential limiting mechanism 3202 can adjust the position of the stop block 323 to a certain extent through the cooperation of the connecting rod 322 and the base block 321, achieving movable limiting. Specifically, the two circumferential limiting mechanisms 32 are respectively placed at both ends of the mounting plate 13, with the fixed circumferential limiting mechanism 3201 placed on the side of the bearing mechanism 20 with a lower horizontal height, and the movable circumferential limiting mechanism 3202 placed on the side of the bearing mechanism 20 with a higher horizontal height. The fixed circumferential limiting mechanism 3201 is always positioned in the installation position. It conforms to the lower radial end face of the stationary blade unit 200, preventing point-line contact from scratching the radial end face of the blade and ensuring that the blade and the fixed circumferential limiting mechanism 3201 always maintain surface contact. The moving circumferential limiting mechanism 3202 can compensate for the insufficient self-weight component of the blade, further enhancing the entry of the blade into the predetermined posture. It conforms to the higher radial end face of the blade.

[0058] The fixed circumferential limiting mechanism 3201 and the moving circumferential limiting mechanism 3202 are basically similar in structure, except that the specific structure of the connecting rod 322 and the shape of the base block 321 are different.

[0059] Specifically, in one embodiment, the base block 321 engages with the mounting groove 1312 of the vertical plate 131 via protrusions at both ends, thereby mounting the circumferential limiting mechanism 32 onto the mounting plate 13. The base block 321 of the fixed circumferential limiting mechanism 3201 has only one mounting position on the vertical plate 131, while the base block 321 of the movable circumferential limiting mechanism 3202 has multiple mounting positions on the vertical plate 131, allowing the specific position of the movable circumferential limiting mechanism 3202 to be adaptively adjusted. Specifically, the mounting groove 1312 for mounting the movable circumferential limiting mechanism 3202 can be configured with multiple mounting slots, thereby adaptably adjusting the mounting position of the movable circumferential limiting mechanism 3202 according to workpieces of different types and sizes, improving versatility. For example, the mounting groove 1312 used to install the dynamic circumferential limiting mechanism 3202 is a first mounting groove 13121. The first mounting groove 13121 has multiple mounting points 131211. By engaging the boss with different mounting points 131211, the installation position of the dynamic circumferential limiting mechanism 3202 can be adjusted. Each mounting point 131211 can be interconnected, making the mounting groove 1312 an irregularly shaped groove as a whole.

[0060] Specifically, in one embodiment, the connecting rod 322 is a ball-end screw structure, with one end of the connecting rod 322 being a ball 3221 and the other end being a cylinder 3222. The cylinder 3222 is provided with external threads, while the base block 321 is provided with matching threaded holes, so that the cylinder 3222 and the base block 321 are connected by threads.

[0061] Furthermore, in the fixed circumferential limiting mechanism 3201, the cylinder 3222 has an external thread at the end away from the sphere 3221. In the movable circumferential limiting mechanism 3202, the connecting rod 322 passes through the base block 321 and is threadedly connected to the base block 321 (the external thread is specifically located in the middle of the cylinder 3222). The end of the connecting rod 322 away from the sphere 3221 has a tool mounting hole 3223. The tool mounting hole 3223 facilitates the insertion of external tools, forming a labor-saving manual drive mechanism. Specifically, the tool mounting hole 3223 is a through pin hole, allowing any rod to pass through it, thus forming a labor-saving manual drive mechanism.

[0062] In other words, in one embodiment, the fixed circumferential limiting mechanism 3201 itself can adjust its posture (by rotating the connecting rod 322, thereby driving the stop block 323 to adjust its position), and can also change its installation position on the vertical plate 131 to adapt to different levels of the stationary blade grid unit 200, thereby improving the versatility of the blade-type workpiece clamping device 100.

[0063] Preferably, in one embodiment, the stop 323 includes a concave stop 3231 and a conformal stop 3232, which are connected by screws. The conformal stop 3232 is used to abut against the workpiece. The interiors of the concave stop 3231 and the conformal stop 3232 together form the spherical cavity, allowing the concave stop 3231 and the conformal stop 3232 to have a certain range of rotational freedom on the sphere 3221, thereby ensuring that the workpiece and the conformal stop 3232 always maintain surface contact. In the dynamic circumferential limiting mechanism 3202, rotating the connecting rod 322 during operation can also cause the concave stop 3231 and the conformal stop 3232 to move forward or backward simultaneously.

[0064] Preferably, in one embodiment, the blade-type workpiece clamping device 100 further includes a sandproof cover 40, which covers the outside of the circumferential limiting mechanism 32, that is, the sandproof cover 40 covers the outer surface of the circumferential limiting mechanism 32 to prevent damage to the non-sandblasted surface of the workpiece in that direction during sandblasting, and can also prevent sand particles from adhering to the threaded surface of the circumferential limiting mechanism 32 and disrupting the normal thread engagement.

[0065] Furthermore, the sand shield 40 is a sheet metal part, and its shape is designed to cover the circumferential limiting mechanism 32, the vertical plate 131 and the sealing plate 313. The sand shield 40 is installed on the circumferential limiting mechanism 32 to protect the blade grid and threads.

[0066] When clamping a blade-type workpiece, the blade-type workpiece clamping device 100 first uses the slope 3111 of the wedge block 311 to position the workpiece axially. Then, the bearing mechanism 20 with a height difference forms a high-low surface, and the workpiece's gravity component causes it to roll towards the fixed limit, achieving initial positioning. Next, by adjusting the gap between the locking block 314 and the vertical plate 131, the pressure blocks 312 on both sides achieve axial limitation of the workpiece. Then, by rotating the connecting rod 322 of the moving circumferential limiting mechanism 3202, the stop block 323 is fed forward, completing the firm clamping of the workpiece circumferentially. After the workpiece sandblasting process is completed, the workpiece can be removed by simply reversing the operation, and all components return to their original positions.

[0067] The blade-type workpiece clamping device 100 strengthens the axial end face limitation by adding the wedge block 311 for fixed positioning, and adds the circumferential limiting mechanism 32 to determine and clamp the workpiece in a predetermined position. At the same time, by replacing a few parts or changing their positions, it can meet the universality requirement of tooling to adapt to workpieces with similar dimensions. Therefore, the blade-type workpiece clamping device 100 can achieve fast, flexible and precise positioning and clamping of workpieces of the same level.

[0068] The blade-type workpiece clamping device 100 provides precise positioning and clamping, ensuring that workpieces of the same grade remain in the same position within the sandblasting chamber during repeated clamping. This avoids the need for manual recalibration each time the sandblasting robot cannot accurately locate the points during a single operation, thus improving sandblasting efficiency. Furthermore, a single set of tooling can be adapted to workpieces with similar dimensions by replacing a few parts, significantly improving production efficiency, reducing processing costs, and meeting the needs of mass production. Moreover, the blade-type workpiece clamping device 100 employs a full-chain corrosion-resistant design, ensuring long-term service stability of the tooling in acid and alkali corrosion environments and at temperatures ranging from room temperature (25℃) to 400℃.

[0069] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A clamping device for blade-type workpieces, characterized in that, Includes a base, a load-bearing mechanism, and a limiting mechanism; The base is provided with a receiving space; The supporting mechanism is disposed in the receiving space to support the workpiece; The limiting mechanism includes an axial limiting mechanism and a circumferential limiting mechanism, which are respectively disposed on the base; The axial limiting mechanism is provided on both sides of the accommodating space. The axial limiting mechanism is used to abut against the end face of the workpiece in the axial direction, and the structure of at least one of the axial limiting mechanisms used to abut against the workpiece can be adjusted in position along the direction of approaching or moving away from the workpiece. The circumferential limiting mechanism is provided at both ends of the accommodating space. The circumferential limiting mechanism is used to abut against the end face of the workpiece in the radial direction to restrict the workpiece from rotating in the circumferential direction. Moreover, the structure of at least one of the circumferential limiting mechanisms used to abut against the workpiece can be adjusted in position along the direction of approaching or moving away from the workpiece.

2. The blade-type workpiece clamping device according to claim 1, characterized in that, The base includes a base plate and a mounting plate disposed on the base plate; The mounting plate is provided in two sets, and the two sets of mounting plates are spaced apart from each other and face each other along the width direction of the base plate, and the accommodating space is located between the two sets of mounting plates; The bearing mechanism and the limiting mechanism are mounted on the mounting plate.

3. The blade-type workpiece clamping device according to claim 2, characterized in that, The mounting plate includes two vertical plates, which are spaced apart and mirror-distributed along the length of the base plate; The height of the near end of the vertical plate is lower than the height of the far end, and the top surface of the vertical plate is at least partially curved.

4. The blade-type workpiece clamping device according to claim 3, characterized in that, The vertical plate is provided with a mounting groove for mounting the circumferential limiting mechanism, a first mounting hole for mounting the axial limiting mechanism, and a second mounting hole for mounting the bearing mechanism. The mounting groove is recessed from the inner surface of the vertical plate and does not penetrate the vertical plate.

5. The blade-type workpiece clamping device according to claim 2, characterized in that, Along the length of the base plate, there are at least two load-bearing mechanisms, and the two load-bearing mechanisms are at different horizontal heights.

6. The blade-type workpiece clamping device according to claim 2, characterized in that, The portion of the bearing mechanism that comes into contact with the workpiece is rotatably configured.

7. The blade-type workpiece clamping device according to claim 2, characterized in that, The axial limiting mechanism includes a wedge block, a pressure block, a sealing plate, and a locking block; The wedge is disposed on the mounting plate, and the wedge is provided with a slope for axial positioning of the workpiece; The pressure block is located between the two vertical plates of the mounting plate and is used to axially abut against the axial end face of the workpiece. The sealing plate is located on the mounting plate and is used to press and adhere to the surface of the workpiece to protect the non-sandblasted surface of the workpiece; Both the pressure block and the sealing plate are movable along the width direction of the base plate, and the pressure block is located inside the sealing plate; The locking block is provided on the outer side of the sealing plate. The locking block can move along the width direction of the base plate to press the sealing plate and the pressure block against the surface of the workpiece. The locking block is threadedly connected to the mounting plate by bolts.

8. The blade-type workpiece clamping device according to claim 2, characterized in that, The circumferential limiting mechanism includes a base block, a connecting rod, and a stop block; The base block is mounted on the mounting plate; The connecting rod is connected to the base block, and a ball is provided at one end of the connecting rod; The stop block is provided with a spherical cavity adapted to the ball, and the stop block is rotatably mounted on the ball through the spherical cavity. The stop block is used to abut against the workpiece.

9. The blade-type workpiece clamping device according to claim 8, characterized in that, The circumferential limiting mechanism located at both ends of the accommodating space is divided into a fixed circumferential limiting mechanism and a movable circumferential limiting mechanism. The movable circumferential limiting mechanism has multiple mounting positions on the mounting plate. The connecting rod in the dynamic circumferential limiting mechanism passes through the base block, the connecting rod is threadedly connected to the base block, and the end of the connecting rod away from the ball is provided with a tool mounting hole.

10. The blade-type workpiece clamping device according to claim 1, characterized in that, It also includes a sand shield, which is installed on the outside of the circumferential limiting mechanism.

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