Flange plate drilling device and drilling method thereof

Abstract

The invention relates to the field of metal machining, and discloses a flange plate drilling device which comprises a base, a support is mounted at the top of the base, a drilling mechanism is mounted at the top of the support, the flange plate drilling device further comprises a lower rotating ring rotationally mounted on the lower portion of the outer surface of the base, and two first supporting cylinders are fixedly connected to the outer surface of the lower rotating ring; a first connecting column and a set of springs are movably connected into the first supporting cylinder in a sleeved mode, a first supporting sleeve is fixedly connected to one end of the first connecting column, and a first rotating shaft and a first clamping block are rotationally installed in the first supporting sleeve. According to the device, through redesign, rigid clamping in the traditional technology is changed, the fixed arc plate which can be bent and deformed and is matched with the outer diameter of the workpiece is designed to abut against the workpiece in a matched mode, the contact area of the fixed arc plate and the workpiece is remarkably increased, and therefore extrusion damage of the fixed arc plate to the local clamping part of the workpiece is reduced.

Description

Technical Field

[0001] This application relates to the technical field of metal processing, and particularly relates to a flange drilling device and a drilling method thereof. Background Art

[0002] A flange is a part for connecting pipes. It is connected to the pipe end, and has holes on its surface to facilitate bolts to pass through and lock and fix two flanges. A rubber gasket is used for sealing between the two flanges. The flange as a whole is annular, and during the processing, holes often need to be drilled on its surface. In the prior art, the fixation of the flange by the flange drilling device is rather rigid. Generally, an arc-shaped or rectangular clamping component is used to clamp the outer side of the flange, which causes great rigid extrusion damage to the surface of the flange, and even causes internal stress damage. Since the outer sides of the flanges are all arc-shaped, the contact parts between the clamping component and it are basically a line. The existing solution is to use an arc block for clamping, but there will be a problem of incompatibility when facing flanges of different sizes. And when using flexible components such as rubber, there will be a problem of central offset after the flange is fixed. The rubber component will deform when being extruded, and it is difficult to control the central position of the flange. Therefore, it is urgent to solve. Summary of the Invention

[0003] This application provides a flange drilling device and a drilling method thereof, which have the advantages of protecting the workpiece and reducing the rigid extrusion damage to the workpiece, so as to solve the problem of workpiece damage caused by rigid clamping in the prior art.

[0004] To achieve the above object, this application adopts the following technical solution: A flange drilling device includes a base, a bracket is installed on the top of the base, and a drilling mechanism is installed on the top of the bracket. It further includes:

[0005] A lower rotating ring, which is rotatably installed at the lower part of the outer surface of the base. Two sets of support cylinders I are fixedly connected to the outer surface of the lower rotating ring. A connecting column I and a set of springs are movably sleeved inside the support cylinder I. One end of the connecting column I is fixedly connected to a support sleeve I. A rotating shaft I and a clamping block I are rotatably installed inside the support sleeve I.

[0006] An upper rotating ring, which is rotatably installed at the upper part of the outer surface of the base. Two sets of support cylinders II are fixedly connected to the outer surface of the upper rotating ring. A connecting column II and another set of springs are movably sleeved inside the support cylinder II. One end of the connecting column II is fixedly connected to a support sleeve II. A rotating shaft II and a clamping block II are rotatably installed inside the support sleeve II.

[0007] On both the left and right sides of the outer surface of the base, there are telescopic rods three fixedly connected. The telescopic ends of the telescopic rods three are fixedly connected with fixed arc plates. On both the upper and lower sides of the fixed arc plates, there are limiting strips fixedly connected. Both the clamping block two and the clamping block one are in contact with the limiting strips.

[0008] Preferably, a transmission mechanism is also provided between the lower rotating ring and the upper rotating ring. The transmission mechanism includes a motor three fixedly installed on the front of the base, a gear two fixedly connected to the bottom of the upper rotating ring, and a gear three fixedly connected to the top of the lower rotating ring. A gear one is fixedly installed on the output shaft of the motor three. The gear one meshes with the gear two and the gear three respectively.

[0009] Preferably, the drilling mechanism includes a telescopic rod one fixedly installed on the top of the bracket. The telescopic end of the telescopic rod one is fixedly installed with a fixed frame. Inside the fixed frame, there is a motor one installed. At the bottom of the fixed frame, there is a turntable rotatably installed. The output shaft of the motor one is in transmission connection with the turntable. At the bottom of the turntable, there is a motor two slidably installed. A drill rod is fixedly installed on the output shaft of the motor two. At the bottom of the turntable, there is also a telescopic rod two installed. The telescopic end of the telescopic rod two is fixedly connected with the motor two. The drill rod is used for drilling the workpiece. The workpiece is clamped by two groups of fixed arc plates.

[0010] Preferably, the connecting column one is elastically supported inside the support cylinder one through a group of springs, and the connecting column two is elastically supported inside the support cylinder two through another group of springs.

[0011] Preferably, the shape of the fixed arc plate is circular arc-shaped and is in adaptive contact with the outer surface of the workpiece. Both the clamping block one and the clamping block two are limited and clamped between the two groups of limiting strips.

[0012] Preferably, the shapes of both the clamping block one and the clamping block two are cams. The outer surfaces of the clamping block one and the clamping block two are in rotational contact with the outer sides of the limiting strips.

[0013] Preferably, the two groups of support cylinders one are distributed in a circumferential symmetry, the two groups of support cylinders two are distributed in a circumferential symmetry, the two groups of clamping block one are sequentially distributed on the left rear side and the right front side of the base, and the two groups of clamping block two are sequentially distributed on the left front side and the right rear side of the base.

[0014] Preferably, the clamping block one on the left rear side and the clamping block two on the left front side are both in rotational contact with the left fixed arc plate, and the clamping block one on the right front side and the clamping block two on the right rear side are both in rotational contact with the right fixed arc plate.

[0015] Preferably, the clamping block one is rotatably installed on the top of the outer surface of the rotating shaft one, and the clamping block two is rotatably installed on the top of the outer surface of the rotating shaft two.

[0016] Preferably, after the fixed arc plate loses the pressing action from the first clamping block and the second clamping block, it will automatically return to a straight state.

[0017] Preferably, a drilling method for a flange drilling device includes the following steps:

[0018] S1. Place the workpiece on the top of the base, start the left and right sets of telescopic rods three, and drive the two fixed arc plates to move synchronously along the left and right sides of the workpiece towards the workpiece until the fixed arc plates are in contact with the outer surface of the workpiece;

[0019] S2. Stop the telescopic rod three, so that the pressure generated by the contact between the fixed arc plate and the workpiece is sufficient to fix the workpiece;

[0020] S3. Start the motor three, and drive the first gear to rotate. Through the meshing transmission of the first gear to the second gear and the third gear, the upper rotating ring and the lower rotating ring rotate synchronously in opposite directions. The lower rotating ring and the upper rotating ring drive the first support cylinder, the first clamping block and the second support cylinder, the second clamping block to rotate in opposite directions respectively;

[0021] S4. The second clamping block and the first clamping block move horizontally towards the edge positions of the fixed arc plate respectively. The first clamping block and the second clamping block rotate self - rotatively when revolving around the axis of the workpiece. Then, the protruding parts of the first clamping block and the second clamping block are in contact with the fixed arc plate;

[0022] S5. The first clamping block will drive the first clamping block, the first support sleeve and the first connecting column to move towards the outside of the first support cylinder under the limitation of its protrusion and the fixed arc plate. The second clamping block will drive the second clamping block, the second support sleeve and the second connecting column to move towards the outside of the second support cylinder under the limitation of its protrusion and the fixed arc plate, and compress the spring at the same time;

[0023] S6. The front and rear sides of the outer edge of the fixed arc plate are pressed by the first clamping block and the second clamping block, and the whole fixed arc plate is kept in adaptive contact with the outer ring surface of the workpiece. The inner ring surface of the fixed arc plate is in full contact with the outer ring surface of the workpiece, and generates a huge frictional force and clamping force to maintain the stability of the workpiece;

[0024] S7. Start the motor two and drive the drill rod to rotate. Start the telescopic rod one to drive the fixed frame, the motor two and the drill rod to move downward to process the surface of the workpiece. Then, control the telescopic rod one to drive the drill rod to reset;

[0025] S8. Then start the motor one, and drive the turntable, the motor two and the drill rod to rotate, so that the drill rod enters the next set of drilling positions on the upper surface of the workpiece. Then control the telescopic rod one to drive the drill rod to move downward and drill the workpiece.

[0026] The beneficial effects of the present invention are as follows:

[0027] This device has been redesigned. It abandons the rigid clamping of traditional technologies. By designing a fixed arc plate that can be bent and deformed to adapt to the outer diameter of the workpiece and making it fit and abut against the workpiece, the contact area between the fixed arc plate and the workpiece is significantly increased, thereby reducing the extrusion damage of the fixed arc plate to the local clamping part of the workpiece.

[0028] 1. First of all, this device is provided with a base to support the workpiece. Then, the two fixed arc plates are driven by the telescopic rods III on the left and right sides of the base to move along the left and right sides of the workpiece towards the workpiece, so that the two fixed arc plates are driven to abut against the outer surface of the workpiece and start to squeeze the workpiece to form a clamping posture. At this time, the two side edges of the fixed arc plate have not yet abutted against the workpiece. By setting a transmission mechanism, the lower rotating ring and the upper rotating ring can rotate synchronously and in opposite directions, driving the two support cylinders I to rotate clockwise around the axis of the workpiece, and driving the two upper rotating rings to rotate counterclockwise around the axis of the workpiece. As a result, the clamping blocks I and II move towards the edge areas of the fixed arc plate respectively. The springs are used to apply pressure to the support cylinders I and II, so that the clamping blocks II and I can generate pressure when they abut against the fixed arc plate. When the clamping blocks I and II revolve around the outer side of the fixed arc plate, the friction force generated between the clamping blocks I and II and the fixed arc plate drives the clamping blocks I and II to rotate self - rotatably, so that the protrusions of the clamping blocks I and II are rotated to the positions abutting against the fixed arc plate, thereby driving the connecting column I away from the inside of the support cylinder I and driving the connecting column II away from the inside of the support cylinder II. Under the action of the resilience generated by the compressed spring, the clamping blocks I and II press the fixed arc plate against the outer surface of the workpiece. This design enables the fixed arc plate to form a wrapping - type clamping effect on the workpiece, increasing the contact area between the fixed arc plate and the workpiece and greatly reducing the rigid damage suffered by the workpiece during clamping.

[0029] 2. This device makes use of the design that the fixed arc plate can be bent and deformed, which can adapt to workpieces of different sizes. When the lower rotating ring and the upper rotating ring drive the clamping blocks I and II to rotate self - rotatably by relative rotation with the outside of the fixed arc plate, and the protrusions of the clamping blocks I and II generate acting forces on the fixed arc plate. At this time, the connecting column I can move relative to the support cylinder I towards the outside of the support cylinder I and compress the spring, so that the clamping block I applies pressure to the fixed arc plate. The connecting column II can move relative to the support cylinder II towards the outside of the support cylinder II and compress another group of springs, so that the clamping block II applies pressure to the fixed arc plate. This design can enable the device to adapt to workpieces of different sizes and improve the applicability of the device.

[0030] 3. The device is also provided with a transmission mechanism to provide power and power transmission functions for the synchronous rotation of the transmission mechanism and the lower swivel ring. By providing a motor three to drive the gear one to rotate, the gear two and gear three meshing with the gear one can perform synchronous reverse rotation when driven by the gear one, thereby driving the lower swivel ring, the support tube one and the clamping block one to rotate clockwise around the axis of the workpiece, and driving the upper swivel ring, the support tube two and the clamping block two to rotate counterclockwise around the axis of the workpiece. This design not only ensures that the fixed arc plate can be completely pressed and fit the outer surface of the workpiece, but also maintains a high degree of synchronization between the clamping block one and the clamping block two in revolution and rotation, so that the forces at various locations on the outer surface of the workpiece are the same, effectively ensuring the positioning accuracy of the workpiece after being fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.

[0032] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0033] Figure 1 It is a schematic diagram of the separation of the transmission mechanism, the lower rotating ring, the upper rotating ring and the spring of the present invention;

[0034] Figure 2 It is a schematic diagram of the front appearance of the overall structure of the present invention;

[0035] Figure 3 It is a front perspective schematic diagram of the overall structure of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the base, transmission mechanism, lower rotating ring, upper rotating ring and spring of the present invention;

[0037] Figure 5 is a schematic diagram of the top view of the base of the present invention;

[0038] Figure 6 It is a front cutaway schematic diagram of the base of the present invention;

[0039] Figure 7 It is a top view cutaway schematic diagram of the base and the upper swivel of the present invention.

[0040] Wherein: 1. Base; 2. Bracket; 3. Drilling mechanism; 31. First telescopic rod; 32. Fixed frame; 33. First motor; 34. Turntable; 35. Second telescopic rod; 36. Second motor; 37. Drill pipe; 4. Workpiece; 5. Transmission mechanism; 51. Third motor; 52. First gear; 53. Second gear; 54. Third gear; 6. Lower rotating ring; 61. First support cylinder; 62. First connecting column; 63. First support sleeve; 64. First rotating shaft; 65. First clamping block; 7. Upper rotating ring; 71. Second support cylinder; 72. Second connecting column; 73. Second support sleeve; 74. Second rotating shaft; 75. Second clamping block; 8. Third telescopic rod; 9. Fixed arc plate; 10. Limit strip; 11. Spring. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0042] Please refer to Figures 1 - 7 , this embodiment discloses a flange drilling device and its drilling method, including a base 1, a bracket 2 is installed on the top of the base 1, a drilling mechanism 3 is installed on the top of the bracket 2, and further includes:

[0043] A lower rotating ring 6, which is rotatably installed on the lower part of the outer surface of the base 1. Two groups of first support cylinders 61 are fixedly connected to the outer surface of the lower rotating ring 6. A first connecting column 62 and a group of springs 11 are movably sleeved inside the first support cylinder 61. One end of the first connecting column 62 is fixedly connected to a first support sleeve 63. A first rotating shaft 64 and a first clamping block 65 are rotatably installed inside the first support sleeve 63;

[0044] An upper rotating ring 7, which is rotatably installed on the upper part of the outer surface of the base 1. Two groups of second support cylinders 71 are fixedly connected to the outer surface of the upper rotating ring 7. A second connecting column 72 and another group of springs 11 are movably sleeved inside the second support cylinder 71. One end of the second connecting column 72 is fixedly connected to a second support sleeve 73. A second rotating shaft 74 and a second clamping block 75 are rotatably installed inside the second support sleeve 73;

[0045] On the left and right sides of the outer surface of the base 1, third telescopic rods 8 are fixedly connected. The telescopic ends of the third telescopic rods 8 are fixedly connected to fixed arc plates 9. Limit strips 10 are fixedly connected to the upper and lower sides of the fixed arc plates 9. Both the second clamping block 75 and the first clamping block 65 are in contact with the limit strips 10, and the limit strips 10 can exert a limiting and supporting effect on the first clamping block 65 and the second clamping block 75;

[0046] This device has been redesigned. Instead of the rigid clamping of traditional technologies, it is designed with a fixed arc plate 9 that can be bent and deformed to fit the outer diameter of the workpiece 4 and is adapted to abut against the workpiece 4, significantly increasing the contact area between the fixed arc plate 9 and the workpiece 4, thereby reducing the extrusion damage of the fixed arc plate 9 to the local clamping part of the workpiece 4.

[0047] First, this device is provided with a base 1 to support the workpiece 4. Then, the two groups of fixed arc plates 9 are driven by the telescopic rods three 8 arranged on the left and right sides of the base 1 to move along the left and right sides of the workpiece 4 towards the workpiece 4, so that the two groups of fixed arc plates 9 are driven to abut against the outer surface of the workpiece 4 and start to extrude the workpiece 4 to form a clamping posture. At this time, the two side edges of the fixed arc plate 9 have not yet abutted against the workpiece 4. By setting a transmission mechanism 5, the lower rotating ring 6 and the upper rotating ring 7 can rotate synchronously and in opposite directions, driving the two groups of support cylinders one 61 to rotate clockwise around the axis of the workpiece 4, and driving the two groups of upper rotating rings 7 to rotate counterclockwise around the axis of the workpiece 4. As a result, the clamping blocks one 65 and the clamping blocks two 75 move towards the edge areas of the fixed arc plate 9 respectively. Using the spring 11 to press on the support cylinders one 61 and the support cylinders two 71, the clamping blocks two 75 and the clamping blocks one 65 can generate pressure when abutting against the fixed arc plate 9. When the clamping blocks one 65 and the clamping blocks two 75 revolve around the outer side of the fixed arc plate 9, the clamping blocks one 65 and the clamping blocks two 75 are driven to rotate by themselves using the frictional force generated between the clamping blocks one 65, the clamping blocks two 75 and the fixed arc plate 9, so as to rotate the protrusions of the clamping blocks one 65 and the clamping blocks two 75 to the positions abutting against the fixed arc plate 9, thereby driving the connecting column one 62 away from the inside of the support cylinder one 61 and driving the connecting column two 72 away from the inside of the support cylinder two 71. Under the action of the resilience generated by compressing the spring 11, the clamping blocks one 65 and the clamping blocks two 75 press the fixed arc plate 9 against the outer surface of the workpiece 4. This design enables the fixed arc plate 9 to form a wrapping clamping effect on the workpiece 4, improving the contact area between the fixed arc plate 9 and the workpiece 4 and greatly reducing the rigid damage suffered by the workpiece 4 when being clamped.

[0048] This device utilizes the design that the fixed arc plate 9 can be bent and deformed, and can be adapted to workpieces 4 of different sizes. When the lower rotating ring 6 and the upper rotating ring 7 drive the clamping blocks one 65 and the clamping blocks two 75 to rotate by themselves through relative rotation with the outer side of the fixed arc plate 9, and the protrusions of the clamping blocks one 65 and the clamping blocks two 75 generate acting forces on the fixed arc plate 9. At this time, the connecting column one 62 can move towards the outside of the support cylinder one 61 relative to the support cylinder one 61 and compress the spring 11, so that the clamping block one 65 presses on the fixed arc plate 9. The connecting column two 72 can move towards the outside of the support cylinder two 71 relative to the support cylinder two 71 and compress another group of springs 11, so that the clamping block two 75 presses on the fixed arc plate 9. This design can enable the device to be adapted to workpieces 4 of different sizes and improve the applicability of the device.

[0049] Among them, a transmission mechanism 5 is also arranged between the lower rotating ring 6 and the upper rotating ring 7, and the transmission mechanism 5 includes a motor 3 51 fixedly installed on the front of the base 1, a gear 2 53 fixedly connected to the bottom of the upper rotating ring 7, and a gear 3 54 fixedly connected to the top of the lower rotating ring 6, and a gear 1 52 is fixedly installed on the output shaft of the motor 3 51, and the gear 1 52 is meshed with the gear 2 53 and the gear 3 54 respectively;

[0050] The device is also provided with a transmission mechanism 5, so as to provide power and power transmission functions for the synchronous rotation of the transmission mechanism 5 and the lower rotating ring 6. By providing a motor 3 51 to drive the gear 1 52 to rotate, the gear 2 53 and the gear 3 54 meshing with the gear 1 52 can perform synchronous reverse rotation when driven by the gear 1 52, thereby driving the lower rotating ring 6, the support cylinder 1 61 and the clamping block 1 65 to rotate clockwise around the axis of the workpiece 4, and driving the upper rotating ring 7, the support cylinder 2 71 and the clamping block 2 75 to rotate counterclockwise around the axis of the workpiece 4. This design not only ensures that the fixed arc plate 9 can be completely pressed and fit to the outer surface of the workpiece 4, but also maintains a high degree of synchronization between the clamping block 1 65 and the clamping block 2 75 in revolution and rotation, so that the forces at various locations on the outer surface of the workpiece 4 are the same, effectively ensuring the positioning accuracy of the workpiece 4 after being fixed.

[0051] The drilling mechanism 3 includes a telescopic rod 1 31 fixedly mounted on the top of the bracket 2, a fixed frame 32 is fixedly mounted on the telescopic end of the telescopic rod 1 31, a motor 1 33 is installed inside the fixed frame 32, a turntable 34 is rotatably mounted on the bottom of the fixed frame 32, the output shaft of the motor 1 33 is transmission-connected to the turntable 34, a motor 2 36 is slidably mounted on the bottom of the turntable 34, a drill rod 37 is fixedly mounted on the output shaft of the motor 2 36, a telescopic rod 2 35 is also mounted on the bottom of the turntable 34, the telescopic end of the telescopic rod 2 35 is fixedly connected to the motor 2 36, the drill rod 37 is used to perform drilling processing on the workpiece 4, and the workpiece 4 is clamped by two sets of fixed arc plates 9;

[0052] The drilling mechanism 3 is used to fix the workpiece 4. The telescopic rod 1 31 drives the motor 2 36 and the drill rod 37 to move downward, providing the drill rod 37 with power for feeding movement, and the motor 2 36 drives the drill rod 37 to rotate to rotate the workpiece 4 to complete the drilling operation. The motor 2 36 and the drill rod 37 are fixed as a whole at the bottom of the turntable 34. The motor 1 33 can drive the turntable 34 to make a circular motion, and drive the drill rod 37 to make a circular motion, so that the device can continuously perform drilling operations on the surface of the workpiece 4. At the same time, the telescopic rod 2 35 can drive the motor 2 36 and the drill rod 37 to move horizontally to adapt to workpieces 4 of different sizes.

[0053] The connecting column 1 62 is elastically supported inside the supporting tube 1 61 by a set of springs 11, and the connecting column 2 72 is elastically supported inside the supporting tube 2 71 by another set of springs 11;

[0054] During the rotation of the first clamping block 65, the protrusion thereof abuts against the outer side of the fixed arc plate 9, which can drive the first connecting column 62 to move towards the outer side of the first support cylinder 61, compress the spring 11 and generate a resilient force. During the rotation of the second clamping block 75, the protrusion thereof abuts against the outer side of the fixed arc plate 9, which can drive the second connecting column 72 to move towards the outer side of the second support cylinder 71, compress another set of springs 11 and generate a resilient force.

[0055] Among them, the outer shape of the fixed arc plate 9 is circular arc-shaped and is adapted to abut against the outer surface of the workpiece 4. The first clamping block 65 and the second clamping block 75 are both limited and clamped between the two sets of limiting strips 10;

[0056] The fixed arc plate 9 with a circular arc shape has certain bending characteristics. The purpose is to undergo bending deformation under the rotational abutting action of the first clamping block 65 and the second clamping block 75, and abut against the outer surface side of the workpiece 4 in an adaptive manner.

[0057] Among them, the shapes of the first clamping block 65 and the second clamping block 75 are both cams, and the outer surfaces of the first clamping block 65 and the second clamping block 75 are rotationally abutted against the outer side surfaces of the limiting strips 10;

[0058] The cam design of the first clamping block 65 and the second clamping block 75 can keep pressing the fixed arc plate 9 when they are rotationally abutted against the fixed arc plate 9, and force the fixed arc plate 9 to fit more closely with the workpiece 4, increasing the contact area between the fixed arc plate 9 and the outer surface of the workpiece 4 and increasing the friction force.

[0059] Among them, the two sets of first support cylinders 61 are symmetrically distributed in a circumferential manner, the two sets of second support cylinders 71 are symmetrically distributed in a circumferential manner, the two sets of first clamping blocks 65 are sequentially distributed on the left rear side and the right front side of the base 1, and the two sets of second clamping blocks 75 are sequentially distributed on the left front side and the right rear side of the base 1;

[0060] The two sets of first support cylinders 61 and the two sets of second support cylinders 71 are distributed up and down and symmetrically crosswise. When the lower rotating ring 6 and the upper rotating ring 7 rotate, the two sets of first support cylinders 61 and the second support cylinders 71 will drive the first clamping block 65 and the second clamping block 75 to move respectively, completing the pressing of the fixed arc plate 9.

[0061] Among them, the first clamping block 65 located on the left rear side and the second clamping block 75 located on the left front side are both rotationally abutted against the left fixed arc plate 9, and the first clamping block 65 located on the right front side and the second clamping block 75 located on the right rear side are both rotationally abutted against the right fixed arc plate 9;

[0062] The positions of the two sets of first clamping blocks 65 and the two sets of second clamping blocks 75 are as Figure 5 shown. By rotationally abutting against the fixed arc plate 9 and cooperating with the protruding parts to generate pressure on the fixed arc plate 9, the fixed arc plate 9 is forced to fit more closely with the outer surface of the workpiece 4.

[0063] Among them, the first clamping block 65 is rotatably installed at the top of the outer surface of the first rotating shaft 64, and the second clamping block 75 is rotatably installed at the top of the outer surface of the second rotating shaft 74;

[0064] The first clamping block 65 and the second clamping block 75 can drive the first rotating shaft 64 and the second rotating shaft 74 to rotate inside the first support sleeve 63 and the second support sleeve 73 respectively, so as to realize the synchronous function of the revolution and rotation of the first clamping block 65 and the second clamping block 75.

[0065] Among them, after the fixed arc plate 9 loses the pressing action from the first clamping block 65 and the second clamping block 75, it will automatically return to a straight state;

[0066] The fixed arc plate 9 needs to adapt to workpieces 4 of different sizes, so it needs to have a certain ability to recover after deformation.

[0067] A drilling method for a flange drilling device includes the following steps:

[0068] S1. Place the workpiece 4 on the top of the base 1, start the left and right groups of third telescopic rods 8, and drive the two groups of fixed arc plates 9 to move synchronously along the left and right sides of the workpiece 4 towards the workpiece 4 until the fixed arc plates 9 are in contact with the outer surface of the workpiece 4;

[0069] S2. Stop the third telescopic rod 8, so that the pressure generated by the contact between the fixed arc plate 9 and the workpiece 4 is sufficient to fix the workpiece 4;

[0070] S3. Start the third motor 51, and drive the first gear 52 to rotate. Through the meshing transmission of the first gear 52 to the second gear 53 and the third gear 54, the upper rotating ring 7 and the lower rotating ring 6 rotate synchronously in opposite directions. The lower rotating ring 6 and the upper rotating ring 7 drive the first support cylinder 61, the first clamping block 65 and the second support cylinder 71, the second clamping block 75 to rotate in opposite directions respectively;

[0071] S4. The second clamping block 75 and the first clamping block 65 move horizontally towards the edge positions of the fixed arc plate 9 respectively. The first clamping block 65 and the second clamping block 75 rotate around their own axes when revolving around the axis of the workpiece 4. Then, the protruding parts of the first clamping block 65 and the second clamping block 75 are in contact with the fixed arc plate 9;

[0072] S5. The first clamping block 65 will drive the first clamping block 65, the first support sleeve 63 and the first connecting column 62 to move towards the outside of the first support cylinder 61 under the limitation of its protrusion and the fixed arc plate 9. The second clamping block 75 will drive the second clamping block 75, the second support sleeve 73 and the second connecting column 72 to move towards the outside of the second support cylinder 71 under the limitation of its protrusion and the fixed arc plate 9, and at the same time compress the spring (11);

[0073] S6. The front and rear sides of the outer edge of the fixed arc plate 9 are pressed by the first clamping block 65 and the second clamping block 75, and the whole fixed arc plate 9 is kept in adaptive abutment with the outer ring surface of the workpiece 4. The inner ring surface of the fixed arc plate 9 is fully abutted against the outer ring surface of the workpiece 4, generating a huge frictional force and clamping force to maintain the stability of the workpiece 4.

[0074] S7. Start the second motor 36 to drive the drill rod 37 to rotate, and start the first telescopic rod 31 to drive the fixed frame 32, the second motor 36 and the drill rod 37 to move downward to machine the surface of the workpiece 4. Then, control the first telescopic rod 31 to drive the drill rod 37 to reset.

[0075] S8. Then start the first motor 33 to drive the turntable 34, the second motor 36 and the drill rod 37 to rotate, so that the drill rod 37 enters the next set of drilling positions on the upper surface of the workpiece 4, and then control the first telescopic rod 31 to drive the drill rod 37 to move downward to drill the workpiece 4.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A flange drilling device, comprising a base (1), a bracket (2) is installed on the top of the base (1), and a drilling mechanism (3) is installed on the top of the bracket (2), characterized in that, It also includes: A lower rotating ring (6) which is rotatably installed at the lower part of the outer surface of the base (1). Two groups of first support cylinders (61) are fixedly connected to the outer surface of the lower rotating ring (6). A first connecting column (62) and a group of springs (11) are movably sleeved inside the first support cylinder (61). One end of the first connecting column (62) is fixedly connected to a first support sleeve (63). A first rotating shaft (64) and a first clamping block (65) are rotatably installed inside the first support sleeve (63). An upper rotating ring (7) which is rotatably installed at the upper part of the outer surface of the base (1). Two groups of second support cylinders (71) are fixedly connected to the outer surface of the upper rotating ring (7). A second connecting column (72) and another group of springs (11) are movably sleeved inside the second support cylinder (71). One end of the second connecting column (72) is fixedly connected to a second support sleeve (73). A second rotating shaft (74) and a second clamping block (75) are rotatably installed inside the second support sleeve (73). Two telescopic rods three (8) are fixedly connected to the left and right sides of the outer surface of the base (1). The telescopic ends of the telescopic rods three (8) are fixedly connected to fixed arc plates (9). Limiting strips (10) are fixedly connected to the upper and lower sides of the fixed arc plates (9). Both the second clamping block (75) and the first clamping block (65) are in contact with the limiting strips (10).

2. The flange drilling device according to claim 1, characterized in that, A transmission mechanism (5) is further provided between the lower rotating ring (6) and the upper rotating ring (7). The transmission mechanism (5) includes a third motor (51) fixedly installed on the front of the base (1), a second gear (53) fixedly connected to the bottom of the upper rotating ring (7), and a third gear (54) fixedly connected to the top of the lower rotating ring (6). A first gear (52) is fixedly installed on the output shaft of the third motor (51). The first gear (52) meshes with the second gear (53) and the third gear (54) respectively.

3. A flange drilling device according to claim 2, characterized in that, The drilling mechanism (3) includes a first telescopic rod (31) fixedly installed on the top of the bracket (2). The telescopic end of the first telescopic rod (31) is fixedly installed with a fixed frame (32). A first motor (33) is installed inside the fixed frame (32). A turntable (34) is rotatably installed at the bottom of the fixed frame (32). The output shaft of the first motor (33) is in transmission connection with the turntable (34). A second motor (36) is slidably installed at the bottom of the turntable (34). A drill rod (37) is fixedly installed on the output shaft of the second motor (36). A second telescopic rod (35) is further installed at the bottom of the turntable (34). The telescopic end of the second telescopic rod (35) is fixedly connected to the second motor (36). The drill rod (37) is used for drilling the workpiece (4), and the workpiece (4) is clamped by two fixed arc plates (9).

4. The flange drilling device according to claim 3, characterized in that, The first connecting column (62) is elastically supported inside the first support cylinder (61) by a group of springs (11), and the second connecting column (72) is elastically supported inside the second support cylinder (71) by another group of springs (11).

5. The flange drilling device according to claim 4, wherein The outer shape of the fixed arc plate (9) is arc-shaped and is adapted to and abuts against the outer surface of the workpiece (4). The first clamping block (65) and the second clamping block (75) are both limited and clamped between two groups of limiting strips (10).

6. The flange drilling device according to claim 5, characterized in that, The shapes of the first clamping block (65) and the second clamping block (75) are both cams. The outer surfaces of the first clamping block (65) and the second clamping block (75) are both rotationally abutted against the outer side surfaces of the limiting strips (10).

7. A flange drilling device according to claim 6, wherein, The two groups of first support cylinders (61) are symmetrically distributed in a circumferential manner. The two groups of second support cylinders (71) are symmetrically distributed in a circumferential manner. The two groups of first clamping blocks (65) are sequentially distributed on the left rear side and the right front side of the base (1). The two groups of second clamping blocks (75) are sequentially distributed on the left front side and the right rear side of the base (1).

8. A flange drilling device according to claim 7, characterized in that, The first clamping block (65) located on the left rear side and the second clamping block (75) located on the left front side are both rotationally abutted against the left fixed arc plate (9). The first clamping block (65) located on the right front side and the second clamping block (75) located on the right rear side are both rotationally abutted against the right fixed arc plate (9).

9. The flange drilling device according to claim 8, characterized in that, The first clamping block (65) is rotatably installed at the top of the outer surface of the first rotating shaft (64). The second clamping block (75) is rotatably installed at the top of the outer surface of the second rotating shaft (74). After the fixed arc plate (9) loses the pressing action from the first clamping block (65) and the second clamping block (75), it will automatically return to a straight state.

10. The drilling method of a flange drilling device according to claim 9, characterized in that, It includes the following steps: S1. Place the workpiece (4) on the top of the base (1), start the two groups of left and right telescopic rods three (8), and drive the two groups of fixed arc plates (9) to move synchronously along the left and right sides of the workpiece (4) towards the workpiece (4) until the fixed arc plate (9) abuts against the outer surface of the workpiece (4); S2. Stop the telescopic rod three (8) so that the pressure generated by the abutment of the fixed arc plate (9) and the workpiece (4) is sufficient to fix the workpiece (4); S3. Start the motor three (51) and drive the first gear (52) to rotate. Through the meshing transmission of the first gear (52) to the second gear (53) and the third gear (54), the upper rotating ring (7) and the lower rotating ring (6) rotate synchronously in opposite directions. The lower rotating ring (6) and the upper rotating ring (7) drive the first support cylinder (61), the first clamping block (65) and the second support cylinder (71), the second clamping block (75) to rotate in opposite directions respectively; S4. The second clamping block (75) and the first clamping block (65) horizontally move towards the edge positions of the fixed arc plate (9) respectively. The first clamping block (65) and the second clamping block (75) rotate self - rotatably when revolving around the axis of the workpiece (4). Then, the protruding parts of the first clamping block (65) and the second clamping block (75) abut against the fixed arc plate (9); S5. The first clamping block (65) will drive the first clamping block (65), the first support sleeve (63) and the first connecting column (62) to move towards the outside of the first support cylinder (61) under the limitation of its protrusion and the fixed arc plate (9). The second clamping block (75) will drive the second clamping block (75), the second support sleeve (73) and the second connecting column (72) to move towards the outside of the second support cylinder (71) under the limitation of its protrusion and the fixed arc plate (9), and compress the spring (11) at the same time; S6. The front and rear sides of the outer edge of the fixed arc plate (9) are pressed by the first clamping block (65) and the second clamping block (75), and the whole fixed arc plate (9) is kept in adaptive abutment with the outer ring surface of the workpiece (4). The inner ring surface of the fixed arc plate (9) is fully abutted against the outer ring surface of the workpiece (4), generating a huge frictional force and clamping force to maintain the stability of the workpiece (4). S7. Start the second motor (36) to drive the drill rod (37) to rotate, start the first telescopic rod (31) to drive the drill rod (37) to move downward, machine the surface of the workpiece (4), and control the first telescopic rod (31) to drive the drill rod (37) to reset. S8. Then start the first motor (33) to drive the turntable (34), the second motor (36) and the drill rod (37) to rotate, so that the drill rod (37) enters the next set of drilling positions on the upper surface of the workpiece (4), and then control the first telescopic rod (31) to drive the drill rod (37) to move downward to drill the workpiece (4).

Images