A swing processing device for workpieces with variable curvature inner cavity structure

Abstract

The present invention discloses a swing processing device for a workpiece with a variable curvature inner cavity structure in the field of electrolytic machining technology, 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 and a liquid supply assembly are provided on the lower end of the first servo slide; a positioning platform for fixing an anode processing member is provided on the workbench, the anode processing member includes a plurality of arc segments, a second servo slide and a second driving motor are provided on the workbench, and a fixing assembly is provided on the output shaft of the second driving motor; the present invention clamps the anode processing member according to the center of the circle with different curvatures, uses the cathode member to process the corresponding curvature arc segment in the manner of rotary printing of the inner wall, realizes rotary printing electrolytic machining of the inner wall structure of a variable curvature circular ring, and increases the scope of application of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical machining, and specifically to a swing machining device for workpieces with variable curvature inner cavity structures. Background Technique

[0002] The cabin section is the shell that composes a missile or a rocket. Inside the inner wall, there are mounting seats and stiffener structures according to the functions, force-bearing characteristics, and requirements of machining, assembly, use, and maintenance of each section of the cabin section; to reduce weight on the premise of ensuring structural strength, the stiffener structure on the inner wall of the cabin section consists of several inner cavity thin-walled structures, presenting a square frame structure as a whole; to avoid the problem of deformation of the cabin section caused by traditional milling machining, an electrochemical machining method of inner wall spinning printing is used (for example, the electrochemical machining method of thin-walled casings of aeroengines disclosed in the patent with the publication number CN104384643B and the publication document of a rotary tool electrode and its method for electrochemical machining of the inner wall of a casing with the publication number CN114932277A disclose this electrochemical machining method of inner wall spinning printing). The existing electrochemical machining method of inner wall spinning printing has certain limitations and can only process inner wall cylinder structures with a single curvature. There is still no suitable machining tool for special-shaped structural parts of the cabin section and non-standard special-shaped circular ring structures with variable curvature on the inner wall. Summary of the Invention

[0003] The purpose of the present invention is to provide a swing machining device for workpieces with variable curvature inner cavity structures to solve the problem that the existing electrochemical machining method of inner wall spinning printing has certain limitations and can only process inner wall cylinder structures with a single curvature proposed in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A swing machining device for workpieces with variable curvature inner cavity structures, including: a workbench, on which there are columns, on the columns there are brackets and a driving member for driving the brackets to lift, on the brackets there is a first servo slide, and at the lower end of the first servo slide there are a cathode member, a first driving motor for driving the cathode member to rotate, and a liquid supply component;

[0005] On the workbench there is a positioning platform for fixing the anode workpiece, the anode workpiece includes several arc segments, on the workbench there is a second servo slide and a second driving motor, and on the output shaft of the second driving motor there is a fixing component for detachably connecting with the positioning platform; the second servo slide is used to drive the second driving motor to move, changing the connection area between the fixing component and the positioning platform, so that the rotation center of the anode workpiece switches to the center of the circle of the processed arc segment, and the first servo slide is used to drive the first driving motor to move, so that the cathode member fits against the inner wall of the processed arc segment.

[0006] Preferably, the fixing component includes a support and an electromagnet provided on the support 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] 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 component 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 provided on the rotating shaft, a moving block slidably provided on the clamping arms, a moving rod slidably provided on the moving block, an elastic member provided between the moving rod and the moving block, a laser lamp provided on the moving block, and a travel switch located on the moving path of the moving rod and used to drive the laser lamp 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 the circle of different curvatures of the anode processing part, and the cathode part is used to process the corresponding curvature arc segment in the manner of rotary printing of the inner wall, thereby realizing rotary electrolytic processing of the inner wall structure of the variable curvature circular ring. Through the swinging inner wall rotary printing method, 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 This is a structural 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 the anode processing part of the present invention;

[0018] Figure 4 This is a schematic cross-sectional view 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 magnified schematic diagram of the 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 assembly; 131. support; 132. electromagnet; 133. airbag; 134. mounting groove; 135. pressure block; 14. rolling ball; 15. center positioning assembly; 151. rotating shaft; 152. clamping arm; 153. moving block; 154. moving rod; 155. elastic part; 156. travel switch; 157. laser lamp; 16. liquid supply assembly. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts 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 motor output shaft, and a screw sleeve arranged on the outer wall of the screw, the screw sleeve is connected to the bracket 3, and when the motor works, it drives the screw to rotate, so that the screw sleeve moves up or down with the bracket 3); 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, and 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 2 is rotatably mounted on the top wall of the workbench 1 , so that the support 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 several 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. 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 provided on the top wall of the support 131. 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). The support 131 is installed on the output shaft of the second drive motor 12. An opening is provided on the workbench 1 for the support 131 and the electromagnet 132 to pass through the workbench 1.

[0027] Here's how it works:

[0028] First, the anode workpiece 10 is fixed to the top wall of the positioning platform 9. After determining the center of a processed 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 a magnetic force to attract 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 drive motor 12 drives the positioning platform 9 and the anode workpiece 10 to rotate about the center of the processed arc segment, and the first drive motor 6 drives the cathode workpiece 7 to rotate. At the same time, the liquid supply assembly 16 supplies liquid to the processing gap between the anode workpiece 10 and the cathode workpiece 7, electrolyzing the inner wall of the anode workpiece 10 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 assembly 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 existing technology, and the way of connecting the cathode part 7 and the anode processing part 10 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 processing part 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 with the corresponding rotation ratio according to the inner wall rotary printing method for the corresponding curvature sector. Each swing feeds a certain distance. Taking the curvature of the arc segment B as an example, the cathode part 7 is positioned at the center of the circle O1 and rotates at a speed of n1ω. The anode processing part 10 is positioned at the center of the circle O2 and rotates at a speed of ω in the same direction as the cathode part 7. They are fed toward the radius of the circle O2 at a certain speed v1 (the feed 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 processing part 10 and the cathode part 7, so as to continue the swing inner wall rotation processing and realize the rotary electrolytic processing of the variable curvature circular ring inner wall structure.

[0034] In this embodiment, as a further optimization solution, please refer to Figure 4 The outer side of the support 131 is provided with an air bag 133, and the top wall of the support 131 is provided with several mounting grooves 134. The several mounting grooves 134 are symmetrically distributed on the sides of the electromagnet 132. A pressure block 135 is slidably inserted into the inner cavity of the mounting groove 134 (the pressure block 135 and the mounting groove 134 are sealed to prevent gas leakage inside the mounting groove 134). The mounting groove 134 is connected to the inner cavity of the air bag 133 through a pipe. The height of the top wall of the air bag 133 is higher than the height of the top wall of the electromagnet 132; when the electromagnet 132 adsorbs the positioning platform 9, the air bag 133 will first contact the bottom of the positioning platform 9. After the air bag 133 is squeezed, part of the gas inside it is introduced into the inner cavity of the mounting groove 134 to push the pressure block 135 upward to contact the bottom wall of the positioning platform 9 (the top wall of the pressure block 135 is installed with a rubber pad) to prevent the positioning platform 9 from accidentally shifting during processing.

[0035] In this embodiment, as a further optimization solution, please refer to Figure 1 A number 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 reduce the gravity acting on the second drive motor 12.

[0036] In this embodiment, as a further optimization 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 movement; when the bracket 3 moves downward, the second frame body 82 will first contact the top of the positioning platform 9 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 optimization solution of Example 1, please refer to Figure 1 、 Figure 5 and Figure 6 , a circle center positioning assembly 15 is provided on the workbench 1; the circle 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 rod 154 is perpendicular to the moving direction of the moving block 153, the elastic member 155 is provided on the moving block 153 and the moving rod 154, the two laser lamps 157 are respectively provided on the two moving blocks 153, the laser lamp 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 limit switch 156 is provided on the frame. The limit switch 156 is located on the moving path of the moving rod 154; after moving the two clamping arms 152 so that the two form a certain angle, 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 limit 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 facing arc segment, the moving rod 154 presses the limit 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 a bolt is 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] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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) is provided with a support (2) on the workbench (1), a bracket (3) and a driving member (4) for driving the bracket (3) to rise and fall are provided on the support (2), and the characteristics are: a first servo slide (5) is provided on the bracket (3), a cathode member (7), a first driving motor (6) for driving the cathode member (7) to rotate, and a liquid supply component (16) are provided on the lower end of the first servo slide (5); 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 to 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 oscillating processing device for a workpiece with a variable curvature inner cavity structure according to claim 1, characterized in that: The fixing assembly (13) comprises a support (131) and an electromagnet (132) provided on the support (131) and used for adsorbing the positioning platform (9).

3. The oscillating 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 into the mounting groove (134).

4. The oscillating 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 oscillating 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 provided on the mounting frame (8); 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 oscillating 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 oscillating 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) provided on the rotating shaft (151), a moving block (153) slidably provided on the clamping arms (152), a moving rod (154) slidably provided on the moving block (153), an elastic member (155) provided between the moving rod (154) and the moving block (153), a laser light (157) provided on the moving block (153), and a travel switch (156) located on a moving path of the moving rod (154) and used for driving the laser light (157) to operate; 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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