Fixed pressing device for square frame face milling machine and square frame face milling machine

Abstract

The present application relates to a kind of fixed pressing device of square frame face milling machine, including installation base, including radial pressing mechanism of radial profiled pressing plate and including axial locating mechanism of axial abutment plate on installation base, radial profiled pressing plate is set to be able to be radially moved between the non-working position of retracting radially outward and the working position of extending radially inward to press the outer circumferential surface of workpiece, axial abutment plate is set to be rotatably converted between the axial release position of being separated from the axial positioning of workpiece and the axial positioning position of being axially abutted to workpiece.The present application also relates to the square frame face milling machine including above-mentioned fixed pressing device.The present application can clamp workpiece outside workpiece, save time, save labor, easy to observe.

Description

Technical Field

[0001] This invention relates to the field of processing technology for the end face of wind turbine blades, specifically to a fixed clamping device for a square-type end face milling machine and the square-type end face milling machine. Background Technology

[0002] During the machining of the end face of wind turbine blades, the blades need to be secured to a milling machine. Existing conventional blade milling machines hold the blades internally within the workpiece (i.e., the wind turbine blade), without any external support structure. This results in the following drawbacks:

[0003] 1) In case the internal support device fails, the entire milling machine will fall to the ground, especially now that the height of the workpieces is getting larger (already two stories high), a failure would lead to a fatal accident;

[0004] 2) The internal bracing of the workpiece makes the installation of the equipment very troublesome and time-consuming, especially now that the height of the workpiece is getting larger and larger, and it is difficult to observe from above. It is very difficult to hoist the entire milling machine into the workpiece each time, and it is also quite difficult to adjust the parallelism after hoisting it in. Summary of the Invention

[0005] To overcome the above-mentioned defects, the present invention provides a fixing clamping device for a square-type end milling machine that fixes the workpiece from the outside of the workpiece, and the square-type end milling machine itself will be advantageous.

[0006] Therefore, according to one aspect of the present invention, a fixed clamping device for a square-type end milling machine is provided, comprising a mounting base, a radial clamping mechanism including a radially conforming pressure plate mounted on the mounting base, and an axial positioning mechanism including an axially abutting plate, wherein the radially conforming pressure plate is configured to be radially movable between a non-working position that is radially retracted outward and a working position that is radially extended inward to clamp the outer circumferential surface of the workpiece, and the axially abutting plate is configured to be rotatably movable between an axially released position that is detached from the axial positioning of the workpiece and an axially positioned position that abuts the workpiece axially.

[0007] In this invention, the workpiece can be axially positioned and radially pressed by the radial clamping mechanism and the axial positioning mechanism; by the radial movement of the radial conformal pressure plate between the two positions, the workpiece can be clamped from the outside, which is time-saving, labor-saving and easy to observe.

[0008] Furthermore, the fixed clamping devices are used in pairs, and the radial clamping mechanisms of the paired fixed clamping devices are arranged radially opposite each other so that the radial conforming pressure plate clamps the workpiece radially from the outside of the workpiece when it is in its working position; the axial backing plate of the axial positioning mechanism is configured such that when the radial conforming pressure plate extends radially inward from its non-working position to its working position, the axial backing plate rotates from its axial positioning position to its axial release position.

[0009] With the above structural design, the workpiece can first be axially positioned by the axial positioning mechanism, and then the fixing and clamping device starts to work so that the radial conforming pressure plate enters its working position.

[0010] Furthermore, the mounting base includes a base body and mounting beams located on both sides of the base body, wherein a radial clamping mechanism and an axial positioning mechanism are mounted on the base body, and the mounting beams are configured to be mounted in an adjustable position on the corner of the square frame of the square end milling machine.

[0011] The above structural design allows the mounting beam to be adjusted to the corner of the frame according to the diameter of the workpiece.

[0012] Furthermore, the mounting beam is equipped with waist-shaped assembly holes.

[0013] The waist-shaped assembly hole makes it easy to adjust the installation position of the mounting beam, and the structure is simple.

[0014] Furthermore, the radial clamping mechanism also includes a clamping electric cylinder, which is drivably connected to a radial conformal pressure plate, wherein a pressure sensor is mounted on the radial conformal pressure plate.

[0015] With the above structural design, the radial conformal pressure plate can achieve position switching under the drive of the clamping electric cylinder. Moreover, with the setting of the pressure sensor, the clamping electric cylinder can be stopped according to the force of the radial conformal pressure plate pressing the outer circumference of the workpiece.

[0016] Furthermore, the radial conformal pressure plate includes a pressing arc plate and a buffer rubber pad attached to the pressing arc plate.

[0017] By setting up a buffer rubber pad, the radial conformal pressure plate and the workpiece can make flexible contact, avoiding damage to the outer circumferential surface of the workpiece, while also increasing the friction force.

[0018] Furthermore, the dimensions of the clamping arc plate are designed to match the dimensions of the outer circumference of the workpiece.

[0019] Furthermore, the axial positioning mechanism also includes a positioning servo motor, a positioning reducer, and a positioning shaft. The positioning servo motor is driven by the positioning reducer and connected to the positioning shaft. The positioning shaft is connected to the axial support plate, and a touch-type limit switch is provided on the axial support plate.

[0020] With the above structural design, when the touch limit switch senses the end face of the workpiece (such as the stud on the root end face of a wind turbine blade), the axial support plate can rotate between two positions under the drive of the positioning servo motor and the positioning shaft.

[0021] According to another aspect of the present invention, a square-type end milling machine is provided, comprising a square frame and the aforementioned fixed clamping device for the square-type end milling machine, wherein the fixed clamping devices are arranged in pairs, and each pair of fixed clamping devices is radially oppositely mounted on two opposite corners of the square frame.

[0022] The above-described structure enables the fixing and clamping device to clamp the workpiece radially.

[0023] Furthermore, there are two pairs of fixed clamping devices, so that a fixed clamping device is adjustablely installed at each of the four corners of the frame. In addition, the frame-type end milling machine also includes a motion controller, which is electrically connected to each fixed clamping device.

[0024] With the above structural design, the fixed clamping device can clamp the workpiece from four sides in two mutually perpendicular radial directions.

[0025] These and other aspects of the present invention will be more clearly illustrated by referring to the embodiments described below. Attached Figure Description

[0026] The structure of the invention, as well as further objects and advantages, will be better understood from the following description taken in conjunction with the accompanying drawings, wherein like reference numerals identify like elements:

[0027] Figure 1 This is a perspective view of a fixed clamping device for a square-type end milling machine according to a specific embodiment of the present invention, wherein the axial support plate is in the axial positioning position.

[0028] Figure 2 yes Figure 1 An exploded perspective view of a fixed clamping device for a rectangular end milling machine.

[0029] Figure 3 yes Figure 1 Another perspective view of the fixed clamping device for the box-type end milling machine shown, in which the axial support plate is in the axial release position;

[0030] Figure 4 yes Figure 1 Another perspective view of the fixed clamping device for the box-type end milling machine shown.

[0031] Figure 5 yes Figure 4 A sectional view along line AA of the fixed clamping device for the box-type end milling machine shown.

[0032] Figure 6 yes Figure 4 A cross-sectional view along line BB of the fixed clamping device for the box-type end milling machine shown;

[0033] Figure 7 This is a perspective view of a square-type end milling machine according to a specific embodiment of the present invention;

[0034] Figure 8 yes Figure 7 A cross-sectional view along line CC of the box-type end milling machine shown.

[0035] Figure 9 yes Figure 7 The diagram shows the structure of a rectangular end milling machine in operation. Detailed Implementation

[0036] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0037] First, it should be noted that "radial outward" in this article refers to the radial conforming pressure plate moving away from the workpiece along the radial direction, while "radial inward" refers to the radial conforming pressure plate moving closer to the workpiece along the radial direction.

[0038] like Figures 1 to 6 As shown, a fixed clamping device for a square-type end milling machine according to a specific embodiment of the present invention includes a mounting base 1, a radial clamping mechanism 3, and an axial positioning mechanism 5.

[0039] like Figure 2 , Figures 4 to 6 As shown, and refer to Figures 7 to 9 The mounting base 1 includes a base body 10 and mounting beams 12 located on both sides of the base body 10. A radial clamping mechanism 3 and an axial positioning mechanism 5 are mounted on the base body 10. The mounting beams 12 are configured to be positionably mounted on the corner 103 of the square frame 101 of the square end milling machine 100 (see...). Figure 8 On. Specifically, such as Figure 4 As shown, and refer to Figure 8 In this embodiment, the mounting beam 12 is provided with a waist-shaped mounting hole 13, which facilitates the use of fastening bolts 105 to adjust the position of the mounting beam 12 to the corner 103 of the frame 101.

[0040] For example Figure 2 , Figures 4 to 6 As shown, and refer to Figure 1 and Figure 3 The radial clamping mechanism 3 includes a clamping electric cylinder 30 and a radial conformal clamping plate 32. The clamping electric cylinder 30 is fixedly mounted on the base body 10 of the mounting base 1 and is drivably connected to the radial conformal clamping plate 32 (i.e., the radial conformal clamping plate 32 is connected to the electric cylinder head 31 of the clamping electric cylinder 30, see...). Figure 6This allows the radially conformal pressure plate 32 to be in a non-working position where it is radially retracted outwards (see...). Figure 4 ) and radially inwardly extending to clamp the workpiece (see Figure 9 In this embodiment, the working position of the outer circumference of the wind turbine blade 300 is shown in (see...). Figure 3 , Figure 9 The two can be radially moved between each other.

[0041] For example Figures 1 to 6 As shown, the axial positioning mechanism 5 includes a positioning servo motor 50, a clamping reducer 52, a positioning shaft 54, and an axial support plate 56. The axial support plate 56 is equipped with a touch-type limit switch (not shown). The positioning servo motor 50 is mounted on the base body 10 of the mounting base 1 via the clamping reducer 52 and can drive the positioning shaft 54. The axial support plate 56 is fixed to the end of the positioning shaft 54, thus enabling the positioning servo motor 50 to reach the axial release position (see figure) when it is no longer axially positioned on the wind turbine blade 300, driven by the positioning servo motor 50 via the positioning shaft 54. Figure 3 ) and the axial positioning position of the axial upper abutment against the wind turbine blade 300 (see Figure 1 , Figure 4 and Figure 9 The two can be rotated between each other. It should be noted that, as... Figure 2 As shown, the base body 10 is provided with a shaft hole 14 for the positioning shaft 54 ​​to pass through. One end of the positioning shaft 54 ​​is connected to the pressure reducer 53, and the other end is connected to the axial support plate 56.

[0042] In this embodiment, reference Figure 7 and Figure 9 The fixed clamping devices are used in pairs, and the radial clamping mechanisms 3 of the paired fixed clamping devices are arranged radially opposite each other, so that the radial conformal clamping plate 32 clamps the wind turbine blade 300 radially from the outside of the wind turbine blade 300 when it is in its working position; and the axial backing plate 56 of the axial positioning mechanism 5 is configured such that when the radial conformal clamping plate 32 extends radially inward from its non-working position to its working position, that is, when clamping the wind turbine blade 300, the axial backing plate 56 can rotate from its axial positioning position to its axial release position, thereby opening the milling path so that the milling head of the square end milling machine can mill the wind turbine blade 300.

[0043] Furthermore, such as Figure 2 and Figure 4As shown, in this embodiment, the radial conformal pressure plate 32 includes a pressing arc plate 31 and a buffer rubber pad 33 attached to the pressing arc plate 31. A pressure sensor (not shown) is mounted on the buffer rubber pad 33 to sense whether the radial pressing mechanism 3 has pressed the wind turbine blade 300. It should be understood that the dimensions of the pressing arc plate 31 and the buffer rubber pad 33 are designed to match the dimensions of the outer circumference of the wind turbine blade 300. Furthermore, the use of a pressure sensor in this embodiment can be replaced by a torque current sensor in another embodiment. The latter can sense the magnitude of the torque current of the servo motor and control the start and stop of the pressing electric cylinder 30 accordingly.

[0044] like Figure 7 and Figure 9 As shown, another aspect of the present invention provides a frame-type end milling machine 100, which includes a frame 101 and the aforementioned fixing and clamping devices for a frame-type end milling machine. The fixing and clamping devices are arranged in pairs; in this embodiment, there are two pairs. Each pair of fixing and clamping devices is radially mounted on two opposite corners 103 of the frame 101. That is, a fixing and clamping device is adjustablely mounted on each of the four corners 103 of the frame 101. It should be noted that the frame-type end milling machine 100 also includes a motion controller (not shown), which is electrically connected to each fixing and clamping device to control their operation.

[0045] The following is for reference. Figure 1 and Figure 9 Here is a brief introduction to the working process of this invention:

[0046] First, the wind turbine blade 300 (via the lifting point) is hoisted to the work station, and the entire frame 101 of the square end milling machine 100 is moved toward the tip of the wind turbine blade 300 until the axial support plate 56 of the fixing and clamping device contacts the root stud 301 of the wind turbine blade 300. After the touch limit switch on the axial support plate 56 senses the contact of the root stud 301, it transmits the information to the motion controller, which then controls the positioning servo motor 50 of the axial positioning mechanism 5 to stop.

[0047] Next, the four fixed clamping devices located at the four corners 103 of the frame 101 operate simultaneously. The radial conformal pressure plate 32 of each fixed clamping device extends radially inward from the non-working position toward the wind turbine blade 300 and enters the working position. When the motion controller determines that the pressure sensed by the pressure sensor on the radial conformal pressure plate 32 has reached the predetermined threshold, it controls the clamping electric cylinder 30 to stop operating.

[0048] Then, the motion controller controls the positioning servo motor 50 on each fixed clamping device to drive the positioning shaft 54 ​​to rotate 90° with the axial backing plate 56, from its axial positioning position to its axial release position, that is, the axial backing plate 56 is retracted to a safe distance, giving up the milling head working area.

[0049] Compared with existing technologies, the present invention presses the outer circumference of the blade root from the outside of the wind turbine blade 300, which is simple to operate, easy to observe, time-saving, labor-saving, safe and reliable.

[0050] The technical content and features of this invention have been disclosed above. However, it is understood that, under the inventive concept of this invention, those skilled in the art can make various changes and improvements to the above structure, including combinations of the technical features disclosed or claimed herein, as well as other combinations that explicitly include these features. These modifications and / or combinations all fall within the technical field of this invention and are within the scope of protection of the claims of this invention.

Claims

1. A fixing and clamping device for a square-frame end milling machine, characterized in that... The device includes a mounting base, a radial clamping mechanism including a radially conforming pressure plate mounted on the mounting base, and an axial positioning mechanism including an axially abutting plate. The radially conforming pressure plate is configured to be radially movable and switchable between a non-working position that is radially retracted outward and a working position that is radially extended inward to clamp the outer circumferential surface of the workpiece. The axially abutting plate is configured to be rotatably switchable between an axially released position that is detached from the axial positioning of the workpiece and an axially positioned position that abuts the workpiece upward. The fixed clamping devices are used in pairs, and the radial clamping mechanisms of the paired fixed clamping devices are arranged radially opposite each other so that the radial conforming pressure plate clamps the workpiece radially from the outside of the workpiece when it is in its working position; the axial backing plate of the axial positioning mechanism is configured such that when the radial conforming pressure plate extends radially inward from its non-working position to its working position, the axial backing plate rotates from its axial positioning position to its axial release position.

2. The fixing and clamping device for a square-frame end milling machine as described in claim 1, characterized in that, The mounting base includes a base body and mounting beams located on both sides of the base body. The radial clamping mechanism and the axial positioning mechanism are mounted on the base body. The mounting beams are configured to be mounted in an adjustable position on the corner of the square frame of the square end milling machine.

3. The fixing and clamping device for a square-frame end milling machine as described in claim 2, characterized in that, The mounting beam is provided with waist-shaped assembly holes.

4. The fixing and clamping device for a square-frame end milling machine as described in claim 1, characterized in that, The radial clamping mechanism further includes a clamping electric cylinder, which is drivably connected to the radial conformal pressure plate, wherein a pressure sensor is mounted on the radial conformal pressure plate.

5. The fixing and clamping device for a square-frame end milling machine as described in claim 4, characterized in that, The radial conformal pressure plate includes a pressing arc plate and a buffer rubber pad attached to the pressing arc plate.

6. The fixing and clamping device for a square-frame end milling machine as described in claim 5, characterized in that, The dimensions of the clamping arc plate are designed to match the dimensions of the outer circumference of the workpiece.

7. The fixing and clamping device for a square-frame end milling machine as described in claim 1, characterized in that, The axial positioning mechanism further includes a positioning servo motor, a positioning reducer, and a positioning shaft. The positioning servo motor is driven and connected to the positioning shaft via the positioning reducer. The positioning shaft is connected to the axial support plate. Furthermore, a touch-type limit switch is provided on the axial support plate.

8. A square-frame end milling machine, characterized in that... The invention includes a frame and a frame-type end milling machine fixing clamping device as described in any one of claims 1 to 6, wherein the fixing clamping devices are arranged in pairs, and each pair of fixing clamping devices is radially oppositely mounted on two opposite corners of the frame.

9. The square-frame end milling machine as described in claim 8, characterized in that, The fixed clamping devices are in pairs, so that one fixed clamping device is adjustablely installed at each of the four corners of the frame, and the frame-type end milling machine also includes a motion controller electrically connected to each of the fixed clamping devices.

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