Workpiece clamping structure and micro-arc oxidation equipment comprising same

Abstract

The invention relates to the technical field of micro-arc oxidation, particularly discloses a workpiece clamping structure and micro-arc oxidation equipment comprising the same, and aims to solve the problem of machining dead angles in the prior art. The micro-arc oxidation equipment comprises a micro-arc oxidation pond, micro-arc oxidation liquid is contained in the micro-arc oxidation pond, the micro-arc oxidation pond is of a rectangular structure with an opening in the upper end, a clamping base is arranged above the micro-arc oxidation pond, a workpiece clamping structure used for clamping a workpiece is arranged on the clamping base, and the workpiece clamping structure is connected with the micro-arc oxidation pond. The clamping base is connected with a lifting structure for driving the clamping base to move up and down, and a power supply structure for electrifying a workpiece is arranged on the micro-arc oxidation pond. The electroplating device is designed according to existing requirements, a workpiece can be clamped, then a protection layer is formed on the outer side of the workpiece according to the electroplating principle, the workpiece can be driven to rotate, electroplating dead angles can be eliminated while rotation is conducted, and the machining quality is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of micro-arc oxidation, in particular to a workpiece clamping structure and a micro-arc oxidation device comprising the same. BACKGROUND

[0002] When processing cylindrical structure workpieces (such as shafts, tubular parts, etc.) by micro-arc oxidation, the existing clamping structure has many adaptability problems: traditional devices mostly use two-end fixing or single-side clamping methods, which have poor adaptability to cylindrical workpieces of different diameters, and are prone to cause workpiece eccentricity due to uneven clamping force, resulting in shaking under the impact of electrolyte, so that the distance between the cylindrical surface of each part and the electrode is not consistent, causing the thickness deviation of the oxidation film; at the same time, the area of the cylindrical workpiece in contact with the clamping device and the grooves, steps and other parts in the direction of the workpiece axis in the stationary state are prone to form processing dead angles due to the obstruction of electrolyte flow, resulting in incomplete and insufficiently dense oxidation film in these areas; in addition, the simple design of the conductive contacts of some clamping structures has small contact area with the cylindrical surface and poor stability, which is prone to uneven current distribution, causing local oxidation film ablation or abnormal growth, and the clamping parts are prone to corrosion due to long-term immersion in electrolyte, which seriously affects the micro-arc oxidation quality and processing efficiency of the cylindrical workpiece. SUMMARY

[0003] The present application aims to provide a workpiece clamping structure and a micro-arc oxidation device comprising the same, which solves the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A micro-arc oxidation device, comprising a micro-arc oxidation tank, wherein the micro-arc oxidation tank is internally provided with micro-arc oxidation liquid, the micro-arc oxidation tank has a rectangular structure with an open upper end, a clamping base is arranged above the micro-arc oxidation tank, the clamping base is provided with a workpiece clamping structure for clamping a workpiece, the clamping base is connected to a lifting structure for driving the clamping base to move up and down, so that the clamping base can be driven to move up and down by the lifting structure, thereby sending or taking out the clamped workpiece into or from the micro-arc oxidation tank, and a power supply structure for supplying power to the workpiece is arranged on the micro-arc oxidation tank.

[0005] On the basis of the above technical solutions, the present application further provides the following optional technical solutions: In an alternative: the lifting structure includes a horizontally arranged lifting beam, the lifting beam is connected with the power slip ring through a plurality of lifting connecting rods, a threaded block is fixedly arranged at the middle position of the lifting beam, a lifting screw is threadedly arranged on the threaded block, the lower end of the lifting screw is driven by a lifting motor, a support side plate is arranged outside the micro-arc oxidation tank for facilitating the installation of the lifting motor, a frame rod is arranged above the lifting beam, the frame rod is connected and fixed with the lifting beam through vertical rods arranged on both sides of the frame rod, a vertical guide rod is vertically and slidingly arranged at the two ends of the lifting beam, and the lower end of the vertical guide rod is fixedly connected with the outside of the micro-arc oxidation tank.

[0006] In an alternative: the power supply structure includes a power supply module arranged outside the micro-arc oxidation tank, the negative electrode end of the power supply module is electrically connected with a cathode plate group, the cathode plate group is in contact with the liquid inside the micro-arc oxidation tank, and the positive electrode end of the power supply module is electrically connected with the power slip ring through an anode wire group, the power slip ring is electrically connected with the workpiece clamping structure.

[0007] In an alternative: the workpiece clamping structure includes a plurality of clamping sliding grooves arranged in an array on the upper end of the clamping base, a clamping sliding seat is slidingly arranged at each clamping sliding groove, the clamping sliding seat is connected with the inner wall of the clamping sliding groove through a return spring, side sliding grooves matched with the clamping sliding groove are arranged on both sides of the clamping sliding seat, a clamping column is rotatably arranged at the bottom of the clamping sliding seat, a clamping piece for tightly pressing the workpiece is arranged at the lower end of the clamping column, a plurality of clamping sliding seats are connected with a clamping pushing unit for driving the clamping sliding seats to move synchronously along the clamping sliding grooves, and a plurality of clamping columns are connected with a steering driving piece for driving the clamping columns to rotate.

[0008] In an alternative: the clamping piece includes a clamping cylinder arranged at the lower end of the clamping column, the clamping cylinder is a cylinder structure with an open lower end, a plurality of sliding holes are arranged on the outer side of the clamping cylinder, a pressing pin is slidingly arranged in each sliding hole, and a pressing head is arranged at the end of the pressing pin. The pressing head is connected and fixed with the outer side of the clamping cylinder through a pressing spring. The point contact between a plurality of pressing heads and the workpiece constitutes a clamping surface.

[0009] In an alternative: the steering driving piece includes a driving shaft arranged at the shaft end of the clamping column, the driving shaft is connected with a transmission wheel through a guide pin sleeve arranged at the center of the driving shaft, a plurality of transmission wheels are drivingly connected with each other through a transmission belt, and the transmission belt is connected with a power mechanism for driving the transmission belt to rotate.

[0010] In an optional scheme, the power mechanism comprises a tensioning base arranged at the upper end of the clamping driving disc, a tensioning spring is fixed outside the tensioning base, an outer end of the tensioning spring is slidably provided with a tensioning sleeve, the tensioning sleeve and the tensioning spring are rectangular in cross section, the tensioning sleeve and the tensioning base are connected and fixed through a tensioning slide rod, a steering motor is installed at the end of the tensioning sleeve, an output end of the steering motor is connected with a tensioning wheel, and the tensioning wheel is drivingly connected with the outer side of the transmission belt.

[0011] In an optional scheme, the clamping pushing unit comprises a guide pin sleeve arranged at the upper end of the clamping slide base, a clamping driving disc is arranged above the clamping base, a U-shaped frame is arranged above the clamping base, a first motor is installed at the upper end of the U-shaped frame, an output end of the first motor is connected with the clamping driving disc, a plurality of adjusting arc grooves are arranged in an array on the clamping driving disc, and the guide pin sleeve is arranged in the adjusting arc groove in a matched mode.

[0012] In an optional scheme, a plurality of overflow holes are arranged on the outer side of the clamping cylinder, a pushing impeller is arranged at the bottom of the clamping cylinder, and the overflow holes and the abutting pins are arranged in a staggered mode.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows: The present application is designed according to the existing needs, can clamp the workpiece, then form a protective layer on the outer side of the workpiece by using the electroplating principle, and here can also drive the workpiece to rotate, eliminate the electroplating dead angle while rotating, and greatly improve the processing quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of one side of the present application.

[0015] Figure 2 It is a structural schematic view of the other side of the present application.

[0016] Figure 3 It is a structural schematic view of the internal structure of the present application.

[0017] Figure 4 It is a structural schematic view of the steering driving part of the present application.

[0018] Figure 5 It is a structural schematic view of one side of the clamping part of the present application.

[0019] Figure 6 It is a structural schematic view of the other side of the clamping part of the present application.

[0020] Figure 7 It is a structural schematic view of the Figure 5 A structure schematic view of the present application.

[0021] Reference numerals: micro-arc oxidation tank 100, cathode plate assembly 101, power supply module 102, anode wire assembly 103, power connection slip ring 104; Lifting motor 200, supporting side plate 201, lifting beam 202, threaded block 203, lifting screw 204, vertical guide rod 205, frame rod 206, lifting connecting rod 207; Clamping member 300, clamping slide 301, return spring 302, clamping column 303, clamping cylinder 304, pressing pin 305, compression spring 306, side slide groove 307, conductive slide 308, pushing impeller 309, overflow hole 310, pressing head 311, guide pin sleeve 312; Steering drive 400, tensioning spring 401, tensioning base 402, tensioning wheel 403, steering motor 404, tensioning sleeve 405, tensioning slide rod 406; Clamping base 500 , transmission belt 501 , U-shaped frame 502 , first motor 503 , transmission wheel 504 , adjustment arc slot 505 , clamping drive disk 506 . 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0023] like Figures 1-7 As shown, an embodiment of the present invention provides a micro-arc oxidation device, including a micro-arc oxidation pool 100, wherein the micro-arc oxidation pool 100 is filled with micro-arc oxidation liquid, and the micro-arc oxidation pool 100 is a rectangular structure with an open upper end. A clamping base 500 is provided above the micro-arc oxidation pool 100, and a workpiece clamping structure for clamping the workpiece is provided on the clamping base 500. An electrically connected slip ring 104 is provided on the outer side of the clamping base 500. The clamping base 500 is connected to a lifting structure for driving it to move up and down. The lifting structure can drive the clamping base 500 to move up and down, thereby sending the clamped workpiece into the micro-arc oxidation pool 100 or taking it out of the micro-arc oxidation pool 100, and the micro-arc oxidation pool 100 is provided with a power supply structure for energizing the workpiece.

[0024] The workpiece clamping structure comprises a plurality of clamping sliding grooves arranged in an array on the upper end of the clamping base 500, each clamping sliding groove is provided with a clamping sliding seat 301 in a sliding manner, the clamping sliding seat 301 is connected with the inner wall of the clamping sliding groove through a reset spring 302, the two sides of the clamping sliding seat 301 are provided with side sliding grooves 307 matched with the clamping sliding groove, the bottom of the clamping sliding seat 301 is rotatably provided with a clamping column 303, the lower end of the clamping column 303 is provided with a clamping piece 300 for tightly pressing the workpiece, a plurality of clamping sliding seats 301 are connected with a clamping pushing unit for driving the clamping sliding seats 301 to move synchronously along the clamping sliding groove, and a plurality of clamping columns 303 are connected with a steering driving element 400 for driving the clamping columns 303 to rotate, in use, the clamping pushing unit drives a plurality of supporting side plates 201 to move towards the center, so that the workpiece is clamped and fixed, then the rotating driving unit drives the clamping piece 300 to rotate, so that the workpiece clamped and covered is exposed, so that the workpiece can be processed in all directions, and the problem of machining dead angle is avoided.

[0025] The clamping piece 300 comprises a clamping cylinder 304 arranged at the lower end of the clamping column 303, the clamping cylinder 304 has a cylinder structure with an open lower end, a plurality of sliding holes are arranged on the outer side of the clamping cylinder 304, a pressing pin 305 is slidably arranged in each sliding hole, the pressing pin 305 is provided with a pressing head 311 at the end, the pressing head 311 is connected and fixed with the outer side of the clamping cylinder 304 through a tight spring 306, and the point contact between a plurality of pressing heads 311 and the workpiece constitutes a clamping surface, so as to match the arc surface of the workpiece; The steering driving element 400 comprises a driving shaft arranged at the shaft end of the clamping column 303, the driving shaft passes through the center of the guide pin sleeve 312 and is connected with a transmission wheel 504, a plurality of transmission wheels 504 are drivingly connected through a transmission belt 501, the transmission belt 501 is connected with a power mechanism for driving the transmission belt 501 to rotate, the transmission belt 501 can drive a plurality of transmission wheels 504 to rotate, the transmission wheel 504 drives the clamping column 303 to rotate through the driving shaft, and power is provided for rotation; The power mechanism comprises a tensioning base 402 arranged at the upper end of the clamping driving disc 506, the tensioning base 402 is fixedly provided with a tensioning spring 401 on the outer side, a tensioning sliding sleeve 405 is slidably arranged at the outer end of the tensioning spring 401, the tensioning sliding sleeve 405 and the tensioning spring 401 are rectangular in cross section, the tensioning sliding sleeve 405 and the tensioning base 402 are connected and fixed through a tensioning sliding rod 406, a steering motor 404 is mounted at the end of the tensioning sliding sleeve 405, the output end of the steering motor 404 is connected with a tensioning wheel 403, and the tensioning wheel 403 is drivingly connected with the outer side of the transmission belt 501. Under the driving of the steering motor 404, the tensioning wheel 403 drives the tensioning sliding sleeve 405 to rotate, and the tensioning sliding sleeve 405 drives the transmission belt 501 to rotate, so as to provide power for transmission; The clamping pushing unit comprises a guide pin sleeve 312 arranged at the upper end of the clamping slide 301, a clamping driving disc 506 arranged above the clamping base 500, a U-shaped frame 502 arranged above the clamping base 500, a first motor 503 arranged at the upper end of the U-shaped frame 502, and an output end of the first motor 503 connected with the clamping driving disc 506, a plurality of adjusting arc grooves 505 arranged in an array on the clamping driving disc 506, and the guide pin sleeve 312 arranged in the adjusting arc grooves 505. The clamping cylinder 304 is further provided with a plurality of overflow holes 310, and the clamping cylinder 304 is provided with a pushing impeller 309 at the bottom. The overflow holes 310 are arranged staggered with the abutting pins 305. When the clamping cylinder 304 rotates rapidly, the pushing impeller 309 pushes the liquid to flow upward. After the liquid enters the clamping cylinder 304, it is discharged along the overflow holes 310. The discharged liquid impacts the surface of the workpiece, which helps to improve the processing effect on the surface of the workpiece. The power supply structure comprises a power supply module 102 arranged outside the micro-arc oxidation tank 100, a negative electrode end of the power supply module 102 electrically connected with the cathode plate group 101, the cathode plate group 101 in contact with the liquid inside the micro-arc oxidation tank 100, a positive electrode end of the power supply module 102 electrically connected with the power connection slip ring 104 through the anode wire group 103, and the power connection slip ring 104 electrically connected with the workpiece clamping structure, so as to supply power to the clamped workpiece. The clamping slide 301 is provided with a conductive sliding sheet 308, and the clamping slide groove on the clamping base 500 is provided with a metal strip matched with the conductive sliding sheet 308, so that sliding electrical contact can be achieved. The lifting structure comprises a horizontal lifting beam 202, the lifting beam 202 connected with the power connection slip ring 104 through a plurality of lifting connecting rods 207, a threaded block 203 fixedly arranged at the middle position of the lifting beam 202, a lifting screw 204 threadedly arranged on the threaded block 203, the lower end of the lifting screw 204 driven by a lifting motor 200, a support side plate 201 arranged outside the micro-arc oxidation tank 100 for facilitating installation of the lifting motor 200, a frame rod 206 arranged above the lifting beam 202, vertical rods arranged at both sides of the frame rod 206 and fixedly connected with the frame rod 206, a vertical guide rod 205 vertically and slidingly arranged at both ends of the lifting beam 202, and the lower end of the vertical guide rod 205 fixedly connected with the outside of the micro-arc oxidation tank 100. Under the driving of the lifting motor 200, the lifting screw 204 rotates relative to the threaded block 203. Under the action of the thread, the lifting beam 202 slides up and down along the vertical guide rod 205, so that the power connection slip ring 104 moves up and down together with the workpiece.

[0026] Working principle: in actual use, fill the micro-arc oxidation tank 100 with micro-arc oxidation liquid, the power supply structure can build a loop between the liquid and the workpiece, drive multiple support side plates 201 towards the center through the clamping and pushing unit, so as to clamp and fix the workpiece, then send the workpiece into the micro-arc oxidation tank 100 through the lifting structure, rotate the clamping piece 300 through the rotary drive unit, so that the clamped workpiece rotates, the originally clamped and covered position is exposed, so as to realize the omnibearing treatment of the workpiece, avoid the problem of machining dead angle, when the clamping cylinder 304 rotates quickly, the impeller 309 will push the liquid upward, the liquid will flow out along the overflow hole 310 after entering the clamping cylinder 304, and the discharged liquid will impact the surface of the workpiece, which helps to improve the treatment effect of the surface of the workpiece.

[0027] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A micro-arc oxidation device, comprising a micro-arc oxidation pool (100), wherein a clamping base (500) is provided above the micro-arc oxidation pool (100), characterized in that: The clamping base (500) is provided with a workpiece clamping structure for clamping the workpiece, an electric slip ring (104) is provided on the outer side of the clamping base (500), the clamping base (500) is connected to a lifting structure for driving it to move up and down, and the micro-arc oxidation tank (100) is provided with a power supply structure for electrifying the workpiece.

2. The micro-arc oxidation equipment according to claim 1, characterized in that: The lifting structure includes a horizontally arranged lifting beam (202), the lifting beam (202) is connected to the power-connected slip ring (104) through a plurality of lifting connecting rods (207), a threaded block (203) is fixedly provided at the middle position of the lifting beam (202), a lifting screw (204) is threaded on the threaded block (203), the lower end of the lifting screw (204) is driven by a lifting motor (200), a supporting side plate (201) is provided on the outer side of the micro-arc oxidation tank (100) for facilitating the installation of the lifting motor (200), a frame rod (206) is provided above the lifting beam (202), both sides of the frame rod (206) are connected and fixed to the frame rod (206) through vertical rods, a vertical guide rod (205) is provided at both ends of the lifting beam (202) for vertical sliding, and the lower end of the vertical guide rod (205) is fixedly connected to the outer side of the micro-arc oxidation tank (100).

3. The micro-arc oxidation equipment according to claim 1, characterized in that: The power supply structure includes a power supply module (102) arranged outside the micro-arc oxidation tank (100), the negative end of the power supply module (102) is electrically connected to the cathode plate group (101), the cathode plate group (101) is in contact with the liquid inside the micro-arc oxidation tank (100), and the positive end of the power supply module (102) is electrically connected to the power connection slip ring (104) through the anode wire group (103), and the power connection slip ring (104) is electrically connected to the workpiece clamping structure.

4. A workpiece clamping structure in a micro-arc oxidation device according to any one of claims 1 to 3, characterized in that: The workpiece clamping structure includes a plurality of clamping slots arranged in an array on the upper end of a clamping base (500), a clamping slide (301) being provided for sliding at each clamping slot position, the clamping slide (301) being connected to the inner wall of the clamping slot via a reset spring (302), side slides (307) matching the clamping slots being provided on both sides of the clamping slide (301), a clamping column (303) being provided at the bottom of the clamping slide (301) for rotation, a clamping member (300) for pressing the workpiece tightly being provided at the lower end of the clamping column (303), a plurality of the clamping slides (301) being connected to a clamping pushing unit for driving them to move synchronously along the clamping slot, and a plurality of the clamping columns (303) being connected to a steering drive member (400) for driving them to rotate.

5. The workpiece clamping structure according to claim 4, characterized in that: The clamping member (300) includes a clamping cylinder (304) arranged at the lower end of the clamping column (303), the clamping cylinder (304) is a cylindrical structure with an open lower end, a plurality of sliding holes are distributed on the outside of the clamping cylinder (304), and a pressing pin (305) is slidingly provided in each sliding hole, and the end of the pressing pin (305) is provided with a pressing head (311) connected and fixed to the outside of the clamping cylinder (304) by a compression spring (306), and the point contact between the plurality of pressing heads (311) and the workpiece constitutes a clamping surface.

6. The workpiece clamping structure according to claim 4, characterized in that: The steering drive member (400) includes a drive shaft arranged at the end of the clamping column (303), the drive shaft passing through the center of the guide pin sleeve (312) and connected to the transmission wheel (504), and the multiple transmission wheels (504) are connected to each other through a transmission belt (501), and the transmission belt (501) is connected to a power mechanism for driving the rotation thereof.

7. The workpiece clamping structure according to claim 6, characterized in that: The power mechanism comprises a tensioning base (402) arranged at the upper end of a clamping drive disk (506); a tensioning spring (401) is fixedly provided on the outer side of the tensioning base (402); a tensioning sleeve (405) is slidably provided on the outer end of the tensioning spring (401); the tensioning sleeve (405) and the tensioning spring (401) have rectangular cross-sections; the tensioning sleeve (405) and the tensioning base (402) are connected and fixed via a tensioning slide rod (406); a steering motor (404) is installed at the end of the tensioning sleeve (405); the output end of the steering motor (404) is connected to a tensioning wheel (403), and the tensioning wheel (403) is in transmission connection with the outer side of the transmission belt (501).

8. The workpiece clamping structure according to claim 4, characterized in that: The clamping and pushing unit includes a guide pin sleeve (312) arranged at the upper end of the clamping slide (301), a clamping drive disk (506) is provided above the clamping base (500), a U-shaped frame (502) is provided above the clamping base (500), a first motor (503) is installed at the upper end of the U-shaped frame (502), the output end of the first motor (503) is connected to the clamping drive disk (506), a plurality of adjustment arc grooves (505) are distributed in an array on the clamping drive disk (506), and the guide pin sleeve (312) is cooperatively arranged in the adjustment arc groove (505).

9. The workpiece clamping structure according to claim 5, characterized in that: A plurality of overflow holes (310) are distributed on the outside of the clamping cylinder (304), a pushing impeller (309) is provided at the bottom of the clamping cylinder (304), and the overflow holes (310) and the pressing pin (305) are staggered.

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