A novel workpiece clamping device

Abstract

This invention relates to a novel workpiece clamping device, comprising an adjusting fixture with a fixture base. A first force-applying device, a second force-applying device, and a third force-applying device are disposed on a standard reference surface of the fixture base to apply forces to the clamped workpiece. The points of application of the forces by the first, second, and third force-applying devices to the workpiece are at different heights relative to the standard reference surface. This clamping device improves workpiece processing efficiency and accuracy, meets the needs of large-scale production, and can significantly improve the economic benefits of workpiece processing.

Description

Technical Field

[0001] This invention belongs to the field of mechanical manufacturing technology and relates to a novel workpiece clamping device. Background Technology

[0002] With the development of the times, the application demands of mechanical equipment are becoming increasingly widespread, and the structures and shapes of workpieces are becoming more diverse. Based on the increasing requirements for workpiece machining accuracy, the requirements for the accuracy and stability of workpiece clamping are also becoming higher, leading to the development of various workpiece clamping devices. Existing workpiece clamping devices have simple clamping structures, often employing multi-point fixing methods, resulting in poor workpiece clamping stability. During machining, the workpiece is prone to movement, affecting machining accuracy. To improve stability and machining accuracy, some clamping devices have complex structural designs, leading to cumbersome workpiece loading and unloading. Furthermore, the complex clamping structure can obstruct the workpiece's inspection points and machining surfaces, affecting subsequent six-point inspection and the establishment of the workpiece coordinate system, ultimately impacting the workpiece's machining accuracy and efficiency. Therefore, designing a clamping device with good clamping stability, high clamping tightness, rapid clamping and positioning, and high machining accuracy is an important research direction in modern mechanical manufacturing technology. Summary of the Invention

[0003] The purpose of this invention is to disclose a novel workpiece clamping device that can quickly position, conveniently load and unload, and has high assembly accuracy, and facilitates the measurement of the spatial position of the workpiece.

[0004] The technical solution for realizing the present invention is as follows:

[0005] A novel workpiece clamping device includes an adjustment fixture 1, on which a fixture base 2 is provided. On the standard reference surface of the fixture base 2, there are a first force-applying device 3, a second force-applying device 4, and a third force-applying device 5 that apply force to the workpiece being clamped. The points of application of the force applied to the workpiece by the first force-applying device 3, the second force-applying device 4, and the third force-applying device 5 are at different heights relative to the standard reference surface.

[0006] The first force-applying device 3 applies downward pressure to the workpiece. Its structure is such that the first connecting block 6 on the tooling base 2 is provided with a pressure plate 7 connected by bolts 8, and the side of the first connecting block 6 is provided with a lateral adjustment bolt 9.

[0007] The second force-applying device 4 is a second connecting block 10 connected to the tooling base 2 by bolts. It has a positioning surface 11 on its side and an extension end 12 extending to the side at the top of the second connecting block 10.

[0008] The third force-applying device 5 applies a lateral top force to the workpiece. Its structure consists of a third connecting block 13 connected to the tooling base 2, and a horizontal bolt 14 is provided on the third connecting block 13.

[0009] The lateral positioning surface 11 of the second connecting block 10 is a plane, a curved surface, or a toothed surface.

[0010] The end of the pressure plate 7 is a bent end 15.

[0011] The first connecting block 6 is a vertical surface, an inclined surface, a curved surface, or a toothed surface relative to the side surface 17 of the second connecting block 10.

[0012] The first force-applying device 3, the second force-applying device 4, and the third force-applying device 5 are arranged in a triangular pattern.

[0013] The adjustment fixture 1 is provided with at least three adjustment bolts 18 on its side.

[0014] The tooling base has an adjustable-height protrusion located in the middle of the three force-applying devices.

[0015] The workpiece clamping device constructed by the above-described technical solution of the present invention has a first force-applying device 3, a second force-applying device 4, and a third force-applying device 5 arranged on the tooling base 2. The force applied to the workpiece by the three force-applying devices is located at different heights, achieving the application of force to the workpiece at different horizontal heights to position and fix the workpiece to be clamped, increasing the stability of workpiece clamping. Furthermore, the edge positions of the force-applying devices clamping the workpiece avoid obstructing the inspection points and processing points of the workpiece. The positioning surface on the first connecting block 6 and the side surface 17 on the second connecting block 10 are in contact with the workpiece surface, and the bent end 15 of the pressure plate 7... The extension end 12 on the upper side of the second connecting block 10 is fitted and fixed to the recess of the workpiece, and the lateral bolt 14 of the third connecting block 13 abuts against the workpiece laterally, realizing the rapid positioning, clamping and firm clamping of the workpiece to be clamped. At the same time, by adjusting the standard surface of the tooling 1 and the standard surface of the tooling base 2 to unify, the coordinate system of the workpiece and the clamping device is matched. After measurement and positioning, the spatial posture of the workpiece is established. The workpiece can be easily and quickly positioned with the clamping device and the machine tool and a unified coordinate system is established, which improves the workpiece processing efficiency and processing accuracy, adapts to the needs of large-scale processing production, and can greatly improve the economic benefits of workpiece processing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a new type of workpiece clamping device;

[0017] Figure 2 This is an exploded view of the structure of a new type of workpiece clamping device;

[0018] Figure 3 This is a schematic diagram of a new type of workpiece clamping device clamping a workpiece;

[0019] Figure 4 This is a side view schematic diagram of the new workpiece clamping device clamping a workpiece. Specific Implementation

[0020] The specific embodiments of the present invention are described in detail below. It should be noted that the description of the specific embodiments of the present invention is for the purpose of facilitating a comprehensive understanding of the technical content of the present invention, and should not be regarded as a limitation on the scope of protection of the claims of the present invention.

[0021] As used in this disclosure, the words “including” or “contains” or similar terms mean that the element preceding the word covers the requirement listed after the word, and do not exclude the possibility that other elements may also be covered.

[0022] For components, specific model numbers, parameters, and interrelationships not described in detail in this section, they may be considered as technologies and equipment known to those skilled in the art, but where appropriate, such technologies and equipment should be considered part of the specification.

[0023] The technical solution of a specific embodiment of the present invention is as follows:

[0024] like Figure 1 As shown, a novel workpiece clamping device includes an adjustment fixture 1, on which a fixture base 2 is provided. On the standard reference surface of the fixture base 2, there are a first force-applying device 3, a second force-applying device 4, and a third force-applying device 5 that apply force to the workpiece being clamped. The points of application of the force applied to the workpiece by the first force-applying device 3, the second force-applying device 4, and the third force-applying device 5 are at different heights relative to the standard reference surface.

[0025] like Figure 1As shown, the bottom of the clamping device for the novel workpiece is provided with an adjustment fixture 1 for assembly with a machine tool. The adjustment fixture 1 has a reference surface, and a fixture base 2 is provided on the adjustment fixture 1. The fixture base 2 is fixed to the adjustment fixture 1 by screws. The reference surface of the fixture base 2 is consistent with the reference surface of the adjustment fixture 1. Three force-applying devices are distributed on the fixture base 2. The first force-applying device 3, the second force-applying device 4, and the third force-applying device 5 each have a standard surface that fits with the reference surface of the fixture base 2, establishing a consistent standard so that the workpiece coordinates with the coordinate system of the clamping device. After the workpiece is clamped, it is measured, positioned, and its posture is adjusted by measuring equipment. Then, it can be installed on the machining tool with the clamping device to achieve rapid positioning and coordinate transformation. The three force-applying devices on the 2 are used to clamp and fix the workpiece to be clamped. The points of application of the force applied by the three force-applying devices to the workpiece to be clamped have a height difference relative to the standard reference surface of the adjusting fixture 1 or the reference surface of the fixture base 2. By applying clamping force to the workpiece to be clamped at different height positions, the clamping force and clamping stability of the workpiece are increased. The workpiece to be clamped is an aero-engine turbine blade. The points of application of the force applied by the three force-applying devices to the turbine blade are all located at the tenon part of the turbine blade, that is, they are all clamped on the tenon of the turbine blade. This ensures that the blade body and edge plate of the turbine blade to be measured and processed are completely exposed without obstruction, leaving sufficient space for movement and processing path, which is convenient for measurement, positioning, attitude adjustment and subsequent precision processing after the turbine blade is clamped into the clamping device.

[0026] The first force-applying device 3 applies downward pressure to the workpiece. Its structure is such that the first connecting block 6 on the tooling base 2 is provided with a pressure plate 7 connected by bolts 8, and the side of the first connecting block 6 is provided with a lateral adjustment bolt 9.

[0027] The first force-applying device 3 is bolted to one side of the fixture base 2 and consists of a first connecting block 6 and a pressure plate 7 mounted on the fixture base 2. The pressure plate 7 is mounted on the first connecting block 6 and applies downward pressure to the workpiece to be clamped. A bolt 8 is screwed into the threaded hole on the pressure plate 7 and tightened downwards to fix the workpiece to the upper surface of the first connecting block 6. At least one lateral adjusting bolt 9 is provided on the side of the first connecting block 6. After the pressure plate 7 fixes the workpiece to be clamped, the lateral adjusting bolt 9 is screwed in from the outside to the inside through the threaded hole on the side surface of the first connecting block 6 to adjust the lateral force. The adjusting bolt 9 is pressed tightly against the workpiece to be clamped and generates a resisting force on the side surface of the workpiece opposite to the first connecting block 6, so as to generate an oblique squeezing force on the workpiece to be clamped; in particular, the pressure plate 7 applies a downward pressure to the top surface of the tenon teeth of the turbine blade and is fixed to the upper surface of the first connecting block 6 by the bolt 8, and then the lateral adjusting bolt 9 provided on the side of the first connecting block 6 is used to press against the side surface of the tenon teeth of the turbine blade through the screw hole on the side of the first connecting block 6, so as to realize the force application and clamping and fixing effect of the first force application device 3 on the turbine blade, wherein, preferably, there are two lateral adjusting bolts 9.

[0028] The second force-applying device 4 is a second connecting block 10 connected to the tooling base 2 by bolts 16. It has a positioning surface 11 on its side and an extension end 12 extending to the side at the top of the second connecting block 10.

[0029] The second force-applying device 4 is located on the opposite side of the tooling base 2, opposite to the position of the first force-applying device 3. It includes a second connecting block 10 mounted on the tooling base 2. The second connecting block 10 is fixed to the tooling base 2 by bolts 16. Adjusting the tightness of the bolts 16 can adjust the position of the second connecting block 10 relative to the tooling base 2, so that the reference surface of the second force-applying device 4 aligns with the reference surface of the tooling base 2, establishing a unified standard. The second connecting block 10 has a positioning surface 11 on its side opposite to the first force-applying device 3, which holds the workpiece to be clamped. The corresponding side of the workpiece is placed on the positioning surface 11 and closely fits the positioning surface 11, serving to position the workpiece. The positioning surface 11 generates a supporting force on the side of the workpiece. This supporting force and the oblique pushing force generated by the first force-applying device 3 on the workpiece constitute an interaction force. This interaction force fastens the workpiece between the first force-applying device 3 and the second force-applying device 4, thus fixing the workpiece. The top of the second connecting block 10 is provided with an extension end 12 extending to the side. The extension end 12 extends into the recess corresponding to the position of the workpiece to be clamped and fits into the recess. This fitting structure not only positions the workpiece to be clamped but also... The workpiece, and the force generated by the fitting together with the positioning surface 11, together realize the positioning and fixing function of the second force application device 4; in particular, the second connecting block 10 is placed on the tooling base 2 on the side opposite to the first force application device 3, and the bolt 16 is screwed into the screw hole on the second connecting block 10 from top to bottom to connect with the tooling base 2, and the tightening of the bolt 16 is adjusted so that the bottom surface of the second connecting block 10 and the upper surface of the tooling base 2 are as close as possible, so that the reference surface of the second connecting block 10 and the reference surface of the tooling base 2 establish a unified standard, and the upper end of the tenon tooth of the turbine blade and the edge plate The connecting part has concave shapes on both sides. The shape of the extension end 12 of the second connecting block 10 of the second force application device 4 extending to one side matches the concave shape. The extension end 12 is inserted into the concave structure to form a tight fit to position the workpiece. The fit structure generates multi-directional and multi-angle forces on the workpiece. Together with the supporting force of the positioning surface 11 of the second connecting block 10 on the tenon, it achieves the clamping and fixing of the workpiece to be clamped. Preferably, there are two bolts 16, which facilitates fixing the second connecting block 10 and the tooling base 2 and can level the reference surface of the second connecting block 10.

[0030] The third force-applying device 5 applies a lateral top force to the workpiece. Its structure consists of a third connecting block 13 connected to the tooling base 2, and a horizontal bolt 14 is provided on the third connecting block 13.

[0031] The third force-applying device 5 is disposed on one side of the tooling base 2, and the third force-applying device 5 has a standard surface that mates with the reference surface of the tooling base 2. The third force-applying device 5 includes a third connecting block 13, which is connected and fixed to the tooling base 2 by two bolts. The upper end of the third connecting block 13 is provided with a horizontal bolt 14. After the workpiece is pushed into the clamping device along the tooling base 2 and mates with the corresponding positions of the first force-applying device 3 and the second force-applying device 4, the depth of the bolt 14 on the third connecting block 13 in the horizontal direction is adjusted to adjust the force against the corresponding surface of the workpiece to be clamped, thereby further defining the position of the workpiece and fixing the workpiece. That is, the third force-applying device 5, together with the first force-applying device 3 and the second force-applying device 4, completes the fixed clamping of the workpiece to be clamped. Specifically, the turbine blade to be clamped is pushed into the clamping position of the tooling base 2 along the opposite side of the third force-applying device 5. The positioning surface of the second force-applying device 4 is aligned with the side of the tenon tooth of the turbine blade, and the extension end 12 at the top of the second force-applying device 4 is inserted into the recess at the upper end of the tenon tooth. At the same time, the pressure plate 7 on the first force-applying device 3 presses down on the top surface of the tenon tooth. Then, the bolt 14 arranged horizontally on the third force-applying device 5 is tightened to press against the other side of the blade tenon tooth, thereby firmly fixing the turbine blade on the tooling base 2.

[0032] The lateral positioning surface 11 of the second connecting block 10 is a plane, a curved surface, or a toothed surface.

[0033] The lateral positioning surface 11 of the second connecting block 10 is used to fit against the corresponding surface of the workpiece to be clamped, thereby achieving positioning. To improve positioning accuracy, the positioning surface 11 can be set to a surface shape that matches the corresponding surface of the workpiece to increase the surface fit. The positioning surface 11 can be a plane, a curved surface, or a toothed surface. In particular, the positioning surface 11 of the second force application device 4 corresponds to the tenon tooth part of the turbine blade to be clamped. The side of the tenon tooth is tooth-shaped. Therefore, the positioning surface 11 of the second force application device 4 is set to a tooth-shaped surface that matches the tooth shape of the tenon tooth. The side of the tenon tooth fits tightly against the positioning surface 11 to achieve accurate positioning and stable support.

[0034] The end of the pressure plate 7 is a bent end 15.

[0035] The end of the pressure plate 7 of the first force application device 3 is provided as a bent end 15, which cooperates with the recess at the top of the tenon tooth of the turbine blade to be clamped. When the first force application device 3 applies force to the turbine blade, the bent end 15 of the pressure plate 7 extends into the recess of the tenon tooth of the blade to apply downward pressure to the blade. The setting of the bent end 15 increases the contact area between the pressure plate 7 and the tenon tooth, thus making it more advantageous for the pressure plate 7 to apply force to the blade, increasing the clamping force and stability of the blade to be clamped.

[0036] The side of the first connecting block 6 relative to the second connecting block 10 is a vertical surface, an inclined surface, a curved surface, or a toothed surface.

[0037] The side surface 17 of the first connecting block 6 relative to the second connecting block 10 serves as a positioning surface for contacting the corresponding surface of the workpiece to be clamped, thereby achieving positioning. By setting the side surface of the first connecting block 6 to match the surface of the workpiece, the surface contact is increased, achieving accurate positioning and stable support. The side surface of the first connecting block 6 relative to the second connecting block 10 can be a vertical surface, an inclined surface, a curved surface, or a toothed surface. In particular, the side surface of the first connecting block 6 relative to the second connecting block 10 corresponds to the tenon tooth of the turbine blade. The side surface of the first connecting block 6 is set to a toothed surface corresponding to the tooth shape of the tenon tooth surface, so that the side surface matches and fits tightly with the side surface corresponding to the tenon tooth. Then, the lateral bolts 9 on the first connecting block 6 are tightened to press the tenon tooth side surface. Combined with the downward pressure of the pressure plate 7 on the first force application device 3 and the force applied to the blade by the second force application device 4, the blade is stably clamped between the first force application device 3 and the second force application device 4.

[0038] The first force-applying device 3, the second force-applying device 4, and the third force-applying device 5 are arranged in a triangular pattern.

[0039] The first force-applying device 3, the second force-applying device 4, and the third force-applying device 5 are respectively disposed at different positions on the tooling base 2. Specifically, the first force-applying device 3 is disposed on one side of the tooling base 2, the second force-applying device 4 is disposed on the opposite side of the tooling base 2 opposite to the first force-applying device 3, and the third force-applying device 5 is disposed on one of the remaining two sides of the tooling base 2. The first force-applying device 3 and the second force-applying device 4 generate an interaction force on the turbine blade, that is, the first force-applying device 3 and the second force-applying device 4 together form a clamping force on the blade, clamping and fixing the blade to the first force-applying device 3. Between the second force-applying device 4 and the third force-applying device 5, a lateral force is applied to the blade in another direction, limiting the blade's displacement. The first force-applying device 3, the second force-applying device 4 and the third force-applying device 5 are distributed in a triangular pattern on the tooling base 2 to apply force to at least three sides of the turbine blade, which is beneficial for more stable blade clamping. Preferably, the first force-applying device 3 is located on the left side of the tooling base 2, the second force-applying device 4 is located on the right side of the tooling base 2 directly opposite to the first force-applying device 3, and the third force-applying device 5 is located on the front side of the tooling base 2.

[0040] The adjustment fixture 1 is provided with at least three adjustment bolts 18 on its side, preferably four.

[0041] The at least three adjusting bolts 18 are provided on the lower side wall of the adjusting fixture 1 and are located in different directions. After the clamping device is installed on the machine tool, the posture of the workpiece on the clamping device is adjusted by rotating the adjusting screws located in different directions according to the processing requirements, so as to straighten the processing posture of the workpiece and meet the processing requirements. In particular, the lower side of the adjusting fixture 1 is provided with four adjusting screws, which are located in four different directions symmetrically in front, back, left and right. The clamping device is assembled on the machine tool, and the workpiece posture is straightened by adjusting the screws in the four directions.

[0042] The tooling base has an adjustable-height protrusion 19 located in the middle of the three force-applying devices.

[0043] The turbine blade is clamped onto the tooling base by the multi-directional force of the first force-applying device 3, the second force-applying device 4, and the third force-applying device 5. Due to the special structure of the turbine blade, it is difficult for the bottom of the turbine blade to make contact or fit with the tooling base, leaving a certain space between them. In order to ensure the stable clamping of the turbine blade and prevent the turbine blade from sliding displacement during processing, an adjustable longitudinal height protrusion 19 is provided on the tooling base. Preferably, the protrusion is an adjustable bolt, which is fixedly connected to the tooling base by screw connection. After the turbine blade is clamped, the height of the bolt is adjusted so that the bolt is pressed against the lower surface of the turbine blade, forming an upward supporting force on the turbine blade to stabilize the clamping and fixing of the turbine blade.

[0044] Although the present invention has been described in conjunction with specific embodiments, many substitutions, modifications, and variations will obviously be apparent to those skilled in the art. Therefore, the scope of protection of the present invention is not limited thereto. Any modifications, substitutions, or combinations made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and concepts of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A novel workpiece clamping device, comprising an adjustment fixture, characterized in that... The adjustment fixture (1) is provided with a fixture base (2). The standard reference surface of the fixture base is provided with a first force-applying device (3), a second force-applying device (4) and a third force-applying device (5) for applying force to the workpiece being clamped. The points of application of the first force-applying device (3), the second force-applying device (4) and the third force-applying device (5) to apply force to the workpiece are at different heights relative to the standard reference surface. The first force-applying device (3) applies downward pressure to the workpiece. Its structure is that the first connecting block (6) on the tooling base (2) is provided with a pressure plate (7) connected by bolts, and the side of the first connecting block (6) is provided with a lateral adjustment bolt (9). The second force application device (4) is a second connecting block (10) connected to the tooling base by bolts. It has a positioning surface (11) on its side. The side surface (17) of the first connecting block (6) relative to the second connecting block (10) serves as a positioning surface for fitting with the corresponding surface of the workpiece to be clamped. The top of the second connecting block has an extension end (12) extending to the side. The extension end (12) extends into the recess at the corresponding position of the workpiece to be clamped and fits into the recess to position the workpiece to be clamped. The third force-applying device (5) applies a lateral top force to the workpiece. Its structure consists of a third connecting block (13) connected to the tooling base (2), and a horizontal bolt is provided on the third connecting block.

2. The novel workpiece clamping device according to claim 1, characterized in that... The lateral positioning surface (11) of the second connecting block (10) is a plane, a curved surface, or a toothed surface.

3. The novel workpiece clamping device according to claim 2, characterized in that... The end of the pressure plate (7) is a bent end (15).

4. The novel workpiece clamping device according to claim 3, characterized in that... The side (17) of the first connecting block (6) relative to the second connecting block (10) is a vertical surface, an inclined surface, a curved surface, or a toothed surface.

5. The novel workpiece clamping device according to claim 4, characterized in that... The first force-applying device (3), the second force-applying device (4), and the third force-applying device (5) are arranged in a triangular pattern.

6. The novel workpiece clamping device according to claim 5, characterized in that... The adjustment fixture (1) is provided with at least three adjustment bolts (18) on its side.

7. The novel workpiece clamping device according to claim 6, characterized in that... An adjustable-height protrusion (19) is provided on the tooling base at the middle position of the three force-applying devices.

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