Swing machining device for variable-curvature inner cavity structure workpiece

Abstract

The invention discloses a swing machining device for a variable-curvature inner cavity structure workpiece in the technical field of electrolytic machining, and the swing machining device comprises a workbench, a supporting column is arranged on the workbench, a support and a driving part used for driving the support to ascend and descend are arranged on the supporting column, a first servo sliding table is arranged on the support, and a second servo sliding table is arranged on the first servo sliding table; a cathode piece, a first driving motor and a liquid supply assembly are arranged at the lower end of the first servo sliding table; a positioning platform used for fixing an anode machined part is arranged on the working table, the anode machined part comprises a plurality of arc-shaped sections, a second servo sliding table and a second driving motor are arranged on the working table, and a fixing assembly is arranged on an output shaft of the second driving motor; clamping is conducted according to the circle centers of different curvatures of the anode machined part, the cathode part is used for machining the arc-shaped sections with the corresponding curvatures according to the inner wall rotary printing mode, rotary printing electrolytic machining of the variable-curvature circular ring inner wall structure is achieved, and the application range of equipment is widened.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic machining, in particular to a swing machining device for a workpiece with a variable curvature inner cavity structure. Background Art

[0002] The cabin section is the shell of a missile or rocket, and the inner wall has a mounting seat and a reinforcing rib structure according to the functions, stress characteristics, processing, assembly, use and maintenance requirements of each section of the cabin section; the weight is reduced while ensuring the structural strength, and the reinforcing rib structure of the inner wall of the cabin section is composed of several inner cavity thin-walled structures, which present a U-shaped structure as a whole; in order to avoid the problem of deformation of the cabin section caused by traditional milling processing, an inner wall rotary electrolysis processing method will be used (for example, the announcement number CN104384643B of an aero-engine thin-wall casing electrolytic processing method and the publication number CN114932277A of a rotary tool electrode and method for rotary electrolytic processing of the inner wall of a casing disclose this inner wall rotary electrolysis processing method). The existing inner wall rotary electrolytic processing method has certain limitations and can only process inner wall cylindrical structures with a single curvature. There is still no suitable processing tool for the cabin section's special-shaped structural parts and non-standard special-shaped circular structures with variable curvature on the inner wall. Summary of the invention

[0003] The purpose of the present invention is to provide a swing processing device for a workpiece with a variable curvature inner cavity structure, so as to solve the problem that the existing inner wall rotary electrolytic processing method proposed in the above background technology has certain limitations and can only process inner wall cylindrical structures with a single curvature.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a swing processing device for a workpiece with a variable curvature inner cavity structure, comprising: a workbench, a pillar is provided on the workbench, a bracket and a driving member for driving the bracket to rise and fall are provided on the pillar, a first servo slide is provided on the bracket, a cathode member, a first driving motor for driving the cathode member to rotate, and a liquid supply component are provided on the lower end of the first servo slide;

[0005] The workbench is provided with a positioning platform for fixing the anode processing part, and the anode processing part includes a plurality of arc segments. The workbench is provided with a second servo slide and a second drive motor, and the output shaft of the second drive motor is provided with a fixing component for detachably connecting with the positioning platform; the second servo slide is used to drive the second drive motor to move, change the connection area between the fixing component and the positioning platform, so that the rotation center of the anode processing part is switched to the center of the processed arc segment, and the first servo slide is used to drive the first drive motor to move, so that the cathode part fits with the inner wall of the processed arc segment.

[0006] Preferably, the fixing assembly includes a support and an electromagnet disposed on the support and used for adsorbing the positioning platform.

[0007] Preferably, an airbag is sleeved on the outer side of the support, and a mounting groove for communicating with the airbag is provided on the support, and a pressure block is slidably inserted into the mounting groove.

[0008] Preferably, the workbench is provided with a rolling ball for supporting the positioning platform.

[0009] Preferably, a mounting frame is provided on the lower end of the first servo slide, and the liquid supply assembly is provided on the mounting frame;

[0010] Wherein, the mounting frame includes a first frame body and a second frame body slidably arranged on the first frame body.

[0011] Preferably, a center positioning assembly is provided on the workbench to locate the center of each arc segment of the anode processing part.

[0012] Preferably, the center positioning assembly includes a rotating shaft, two clamping arms arranged on the rotating shaft, a moving block slidably arranged on the clamping arms, a moving rod slidably arranged on the moving block, an elastic member arranged between the moving rod and the moving block, a laser light arranged on the moving block, and a travel switch located on the moving path of the moving rod and used to drive the laser light to work;

[0013] The moving direction of the moving rod is perpendicular to the moving direction of the moving block, and the irradiation direction of the laser light is the same as the axis of the moving rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are: clamping is performed according to the center of circles of different curvatures of the anode processing parts, and the cathode parts are used to process the corresponding arc segments of curvature in the manner of rotary printing of the inner wall, thereby realizing rotary electrolytic processing of the inner wall structure of the circular ring with variable curvature. By using the swinging rotary printing method of the inner wall, only one cathode is used, which not only saves costs but can even realize the processing of multiple curvatures of the inner wall, thereby increasing the scope of application of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the swing processing device of the present invention;

[0016] Figure 2 This is a schematic diagram of the connection structure between the positioning platform and the anode processing part of the present invention;

[0017] Figure 3 This is a schematic diagram of processing of an anode workpiece according to the present invention;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the fixing assembly of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the circle center positioning component of the present invention;

[0020] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure in the middle.

[0021] In the figure: 1. workbench; 2. pillar; 3. bracket; 4. driving part; 5. first servo slide; 6. first driving motor; 7. cathode part; 8. mounting frame; 81. first frame; 82. second frame; 9. positioning platform; 10. anode processing part; 11. second servo slide; 12. second driving motor; 13. fixing component; 131. support; 132. electromagnet; 133. airbag; 134. mounting groove; 135. pressure block; 14. rolling ball; 15. center positioning component; 151. rotating shaft; 152. clamping arm; 153. moving block; 154. moving rod; 155. elastic part; 156. travel switch; 157. laser lamp; 16. liquid supply component. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figure 1 and Figure 2 , a swing processing device for a workpiece with a variable curvature inner cavity structure, comprising: a workbench 1, a pillar 2 is installed on the top wall of the workbench 1, a bracket 3 is slidably provided on the side wall of the pillar 2, a driving member 4 is installed on the pillar 2 (the driving member 4 includes a motor, a screw installed on the output shaft of the motor, and a screw sleeve sleeved on the outer wall of the screw, the screw sleeve is connected to the bracket 3, the motor works, drives the screw to rotate, and the screw sleeve moves the bracket 3 upward or downward); a first servo slide 5 is provided on the bottom wall of the bracket 3 (the first servo slide 5 can move along the X-axis and Y-axis in the horizontal plane, the device belongs to the existing device, and is not described in detail here); a first driving motor 6 is provided on the lower end of the first servo slide 5, a cathode member 7 is provided on the output shaft of the first driving motor 6, a liquid supply component 16 is provided on the lower end of the first servo slide 5 (the liquid supply component 16 includes a storage tank, a pump arranged inside the storage tank, and a nozzle connected to the pump outlet), and the liquid supply component 16 is located on one side of the cathode member 7.

[0025] It should be noted that the support column 2 is rotatably mounted on the top wall of the workbench 1 , so that the support column 2 can be rotated on the top of the workbench 1 to adjust the position of the cathode component 7 .

[0026] See also Figure 1 and Figure 2 A positioning platform 9 is placed on the top wall of the workbench 1, and the processed anode workpiece 10 is fixed on the top of the positioning platform 9 (the fixing method can be a clamp), and the anode workpiece 10 includes a plurality of arc segments; a second servo slide 11 is provided at the bottom of the workbench 1 (the second servo slide 11 has the same structure and function as the first servo slide 5), and a second drive motor 12 is installed on the upper end of the second servo slide 11, and a fixing component 13 is provided on the output shaft of the second drive motor 12, and the fixing component 13 includes a support 131 and an electromagnet 132 arranged on the top wall of the support 131, and the electromagnet 132 is used to adsorb the positioning platform 9 (the positioning platform 9 is made of a metal material that can be magnetically adsorbed), and the support 131 is installed on the output shaft of the second drive motor 12. An opening is opened on the workbench 1, and the opening allows the support 131 and the electromagnet 132 to pass through the workbench 1.

[0027] Here’s how it works:

[0028] 1. Fix the anode workpiece 10 on the top wall of the positioning platform 9. After determining the center of a processing arc segment of the anode workpiece 10, the second servo slide 11 drives the second drive motor 12 to move so that the axis of the output shaft of the second drive motor 12 is aligned with the determined center. Then, the electromagnet 132 is energized to generate magnetic force to adsorb the positioning platform 9.

[0029] Second, the driving member 4 drives the bracket 3 to move downward, and at the same time the first servo slide 5 works to drive the first driving motor 6 to move until the cathode member 7 is in contact with the inner wall of the anode workpiece 10;

[0030] 3. The second driving motor 12 drives the positioning platform 9 and the anode processing piece 10 to rotate with the center of the processing arc segment as the center of the circle, and the first driving motor 6 drives the cathode piece 7 to rotate. At the same time, the liquid supply component 16 supplies liquid to the processing gap between the anode processing piece 10 and the cathode piece 7, and the inner wall of the anode processing piece 10 is electrolyzed to form an inner cavity window;

[0031] 4. After one arc segment of the anode workpiece 10 is processed, the first drive motor 6 and the second drive motor 12 stop working, and the electromagnet 132 is powered off, so that the connection between the fixing component 13 and the positioning platform 9 is disconnected; the center of the next arc segment of the anode workpiece 10 to be processed is determined, and the above operation is repeated to process the anode workpiece 10.

[0032] It should be noted that the inner wall rotary electrolysis belongs to the prior art, and the way in which the cathode part 7 and the anode processing part 10 are connected to each other and the processing process are not described in detail here; the waste liquid generated during the processing is pumped away for recovery.

[0033] It is also necessary to note that, please refer to Figure 3The anode workpiece 10 is clamped according to the center of the circle with different curvatures, and the cathode part 7 is used to swing and rotate in the same direction according to the inner wall rotary printing method for the corresponding curvature sector, using the corresponding rotation ratio, and feeds a certain distance each time it swings. Taking the curvature of the arc segment B as an example, the cathode part 7 is located at the center of the circle O1 and rotates at a speed n1ω, and the anode workpiece 10 is located at the center of the circle O2 and rotates at a speed ω, swinging and rotating in the same direction as the cathode part 7, and feeds at a certain speed v1 toward the radius of the circle O2 (the feeding thrust is provided by the first servo slide 5), and finally the corresponding inner cavity structure and its corresponding ribs are processed. For other different curvatures, the same method is used to change the rotation center of the anode workpiece 10 and the cathode part 7, so as to continue the swing inner wall rotation processing and realize the rotary electrolytic processing of the inner wall structure of the variable curvature circular ring.

[0034] In this embodiment, as a further optimized solution, please refer to Figure 4 , an airbag 133 is sleeved on the outer side of the support 131, and a plurality of mounting grooves 134 are opened on the top wall of the support 131, and the plurality of mounting grooves 134 are symmetrically distributed on the sides of the electromagnet 132, and a pressing block 135 is slidably inserted into the inner cavity of the mounting groove 134 (the pressing block 135 and the mounting groove 134 are sealed to prevent gas leakage inside the mounting groove 134), and the mounting groove 134 is connected to the inner cavity of the airbag 133 through a pipeline, and the height of the top wall of the airbag 133 is higher than the height of the top wall of the electromagnet 132; when the electromagnet 132 adsorbs the positioning platform 9, the airbag 133 will first contact the bottom of the positioning platform 9, and after the airbag 133 is squeezed, part of the gas inside itself is introduced into the inner cavity of the mounting groove 134, which is used to push the pressing block 135 to move up and contact the bottom wall of the positioning platform 9 (a rubber pad is installed on the top wall of the pressing block 135), so as to prevent the positioning platform 9 from accidentally shifting during processing.

[0035] In this embodiment, as a further optimized solution, please refer to Figure 1 A plurality of rolling balls 14 are provided on the top wall of the workbench 1, and the rolling balls 14 are in contact with the bottom wall of the positioning platform 9; the rolling balls 14 are used to separate the positioning platform 9 from the workbench 1 and support it, so that the positioning platform 9 can rotate without being hindered by the workbench 1, and at the same time, the gravity exerted on the second drive motor 12 is reduced.

[0036] In this embodiment, as a further optimized solution, please refer to Figure 1 and Figure 2A mounting frame 8 is provided on the lower end of the first servo slide 5, and a liquid supply assembly 16 is provided on the mounting frame 8; the mounting frame 8 includes a first frame body 81 and a second frame body 82 slidably provided on the first frame body 81, the second frame body 82 can move up and down, and the second frame body 82 is screwed with bolts for fixing the second frame body 82 after the movement; when the bracket 3 moves downward, the second frame body 82 will first contact with the top of the positioning platform 9, so as to limit the range of descent of the cathode component 7 and prevent it from touching the bottom.

[0037] Example 2

[0038] As a further optimized solution of Example 1, please refer to Figure 1 , Figure 5 and Figure 6 A center positioning assembly 15 is provided on the workbench 1; the center positioning assembly 15 includes a rotating shaft 151, two clamping arms 152, two moving blocks 153, two moving rods 154, two elastic members 155 (springs), two travel switches 156 and two laser lamps 157; the two clamping arms 152 are provided on the rotating shaft 151, the two moving blocks 153 are respectively slidably provided on the clamping arms 152, the moving blocks 153 move along the length extension direction of the clamping arms 152, the two moving rods 154 are respectively slidably provided on the two moving blocks 153, the moving direction of the moving rods 154 is perpendicular to the moving direction of the moving blocks 153, the elastic members 155 are provided on the moving blocks 153 and the moving rods 154, the two laser lamps 157 are respectively provided on the two moving blocks 153, the laser lamps 157 The irradiation direction is the same as the axis of the moving rod 154. A frame is installed on the moving block 153, and a travel switch 156 is arranged on the frame. The travel switch 156 is located on the moving path of the moving rod 154. After moving the two clamping arms 152 to form a certain angle between the two, the two clamping arms 152 are fitted with the side wall of an arc segment, and then the moving block 153 is pushed to make the moving rod 154 fit with the side wall of the arc segment. As the moving block 153 continues to move, the moving rod 154 is pushed closer to the travel switch 156. When the end of the moving rod 154 facing the arc segment is flush with the side wall of the clamping arm 152 close to the side wall facing the arc segment, the moving rod 154 presses the travel switch 156 to make the laser lamp 157 work and irradiate. The intersection of the light rays of the two laser lamps 157 is the center of the arc segment.

[0039] It should be noted that bolts are installed on the rotating shaft 151 to fix the rotating shaft 151 after rotation so that the clamping arm 152 will not move automatically.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A swing processing device for a workpiece with a variable curvature inner cavity structure, comprising: A workbench (1), wherein the workbench (1) is provided with a support (2), wherein the support (2) is provided with a bracket (3) and a driving member (4) for driving the bracket (3) to rise and fall, wherein the bracket (3) is provided with a first servo slide (5), wherein the lower end of the first servo slide (5) is provided with a cathode member (7), a first driving motor (6) for driving the cathode member (7) to rotate, and a liquid supply component (16); The workbench (1) is provided with a positioning platform (9) for fixing an anode processing part (10), and the anode processing part (10) includes a plurality of arc segments. The workbench (1) is provided with a second servo slide (11) and a second drive motor (12), and the output shaft of the second drive motor (12) is provided with a fixing component (13) for detachably connecting with the positioning platform (9); the second servo slide (11) is used to drive the second drive motor (12) to move, change the connection area between the fixing component (13) and the positioning platform (9), so that the rotation center of the anode processing part (10) is switched to the center of the processing arc segment, and the first servo slide (5) is used to drive the first drive motor (6) to move, so that the cathode part (7) is fitted with the inner wall of the processing arc segment.

2. The swing processing device for a workpiece with a variable curvature inner cavity structure according to claim 1, characterized in that: The fixing component (13) comprises a support (131) and an electromagnet (132) disposed on the support (131) and used for adsorbing the positioning platform (9).

3. The swing processing device for a workpiece with a variable curvature inner cavity structure according to claim 2, characterized in that: An air bag (133) is sleeved on the outer side of the support (131), and a mounting groove (134) for communicating with the air bag (133) is provided on the support (131), and a pressure block (135) is slidably inserted in the mounting groove (134).

4. The swing processing device for a workpiece with a variable curvature inner cavity structure according to claim 1, characterized in that: The workbench (1) is provided with a rolling ball (14) for supporting the positioning platform (9).

5. The swing processing device for a workpiece with a variable curvature inner cavity structure according to claim 1, characterized in that: A mounting frame (8) is provided on the lower end of the first servo slide (5), and the liquid supply assembly (16) is arranged on the mounting frame (8); Wherein, the mounting frame (8) comprises a first frame body (81) and a second frame body (82) slidably arranged on the first frame body (81).

6. The swing processing device for a workpiece with a variable curvature inner cavity structure according to claim 1, characterized in that: The workbench (1) is provided with a circle center positioning component (15) for positioning the circle center of each arc segment of the anode processing part (10).

7. The swing processing device for a workpiece with a variable curvature inner cavity structure according to claim 6, characterized in that: The center positioning assembly (15) comprises a rotating shaft (151), two clamping arms (152) arranged on the rotating shaft (151), a moving block (153) slidably arranged on the clamping arms (152), a moving rod (154) slidably arranged on the moving block (153), an elastic member (155) arranged between the moving rod (154) and the moving block (153), a laser lamp (157) arranged on the moving block (153), and a travel switch (156) located on the moving path of the moving rod (154) and used for driving the laser lamp (157) to work; The moving direction of the moving rod (154) is perpendicular to the moving direction of the moving block (153), and the irradiation direction of the laser light (157) is the same as the axis of the moving rod (154).

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