CN113828874B - Movable sealing device and sealing method for contour profile movable type electrolytic machining - Google Patents

Abstract

The invention belongs to the technical field of electrolytic machining, and particularly relates to a movable sealing device and a movable sealing method for outline profile movable electrolytic machining. The method aims to solve the problems that in the prior art, electrolyte leakage is caused between a processing section and the side wall of a part due to long processing distance, flow field disorder is caused, the processing precision and the surface quality are influenced, and even a cathode is burnt due to short circuit. The movable sealing device for the contour profile movable type electrolytic machining is provided with two movable sealing devices, the two movable sealing devices are respectively arranged in mounting grooves on two sides of a base body, the structure of the movable sealing device comprises a supporting shell with a U-shaped section, a pressure spring is arranged between an F surface of the supporting shell and the base body, a plurality of rotating wheels are uniformly distributed in the groove of the supporting shell, a flexible belt is wound on the rotating wheels, two annular sealing grooves are formed in the A surface of the flexible belt, and the sealing grooves are matched with sealing teeth on the base body to form labyrinth sealing; the surface B of the flexible belt is provided with a gear tooth structure and annular grooves symmetrically arranged on two sides of the gear tooth.

Description

Outer profile surface mobile electrolytic machining mobile sealing device and sealing method

technical field

The invention belongs to the technical field of electrolytic machining, and in particular relates to a mobile electrolytic machining mobile sealing device and a sealing method for an outer profile surface.

Background technique

The processing of the outer profile of the drawn metal parts with high hardness and large length has become a difficult problem in processing and manufacturing. In the process of mechanical milling and grinding, due to the large length of the parts, high material hardness, low processing efficiency, serious tool wear, high cost, and processing stress, it is difficult to form the parts at one time.

Electrochemical machining technology uses the principle of electrochemical corrosion, which has the advantages of high processing efficiency, no tool loss, no limitation of material hardness, and good surface quality. It can realize low-cost and high-efficiency processing of stretched metal parts at one time.

In the electrolytic machining, the flow field is very important to its accuracy and surface quality. In the process of electrolytic machining of the outer profile of the drawn part using the lateral flow liquid supply, the matrix (consisting of the diversion section, the processing section and the back pressure section) ) Translate along the stretching direction of the workpiece, and elastic gaskets are arranged between the diversion section and the back pressure section of the matrix and the workpiece to prevent electrolyte leakage. However, electrolyte leakage will still occur in the gap between the processing section and the side wall of the part. , If the sealing strip is used to seal against the side wall of the part, the sliding friction between the sealing strip and the side wall of the part will inevitably cause serious wear of the sealing strip. After long-distance processing, electrolyte leakage will occur on the side wall of the part, resulting in a flow field. Disturbance, affecting the machining accuracy and surface quality, and even short circuit, burning the cathode.

SUMMARY OF THE INVENTION

In view of this, the present invention solves the problem of electrolyte leakage between the processing section and the side wall of the part due to the long processing distance in the prior art, resulting in disturbance of the flow field, affecting the processing accuracy and surface quality, and even short-circuiting and burning the cathode. Provided are a mobile electrolytic machining mobile sealing device and a sealing method for an outer profile surface.

In order to solve the problems existing in the prior art, the technical solution adopted in the present invention is: a mobile electrolytic machining mobile sealing device for the outer profile surface. There are two mobile sealing devices, which are respectively arranged in the installation grooves on both sides of the base body. , the structure of the movable sealing device includes a support shell with a "U"-shaped cross-section, a pressure spring is arranged between the F surface of the support shell and the base body, and a number of rotating wheels are evenly arranged in the groove of the support shell. A flexible belt is wound around the rotating wheel, and two annular sealing grooves are arranged on the A side of the flexible belt. The sealing grooves cooperate with the sealing teeth on the base to form a labyrinth seal; the B side of the flexible belt is provided with a gear tooth structure and symmetrical Annular grooves provided on both sides of the gear teeth.

Further, the structure of the rotating wheel includes circular ring sheets on both sides and a gear tooth structure matched with the flexible pulley teeth arranged between the circular ring sheets, the two circular sheets of the rotating wheel and the flexible pulley teeth on both sides. Matching ring grooves.

Further, the E surface of the support shell is provided with a rectangular block matched with the limiting groove of the base body, and the support shell and the base body are driven to move at the same speed by the rectangular block.

Further, the rotating wheel is arranged on the axle, and rotates around the axis of the axle by means of a bearing.

Further, the pressure spring is sleeved on the telescopic rod between the support shell and the base body.

Further, the two sides of the support shell are hinged with claws, and the base body is welded with cylindrical protrusions matched with the claws.

Further, the diameter of the annular plate on the rotating wheel is larger than the diameter of the tip circle of the gear tooth structure.

Further, the widths of the two annular sealing grooves on the surface A of the flexible belt are larger than the width of the sealing teeth matched with the base body, and the length of the sealing teeth is between the length of the processing section and the length of the flexible belt and the side wall of the workpiece.

Further, the sections of the sealing groove and the sealing teeth are all rectangular.

The sealing method of the mobile electrolytic machining mobile sealing device for the profile surface is as follows:

During electrolytic machining, the pressure spring arranged on the F surface of the support shell pushes the support shell, so that the flexible belt is close to the side wall of the workpiece; the A surface of the flexible belt is provided with two annular sealing grooves and two on the base body. The sealing teeth cooperate to form a labyrinth seal to prevent the leakage of electrolyte; the two sides of the support shell are hinged with claws, and the base body is welded with cylindrical protrusions; The pressure spring keeps the moving sealing device away from the side wall of the workpiece and facilitates the disassembly of the base body.

Compared with the prior art, the present invention includes the following beneficial effects:

1) There is rolling friction between the flexible belt of the present invention and the side wall of the workpiece, and the frictional resistance is small, which can prolong the service life of the flexible belt;

2) The elastic force of the pressure spring of the present invention can be transformed into the sticking pressure of the flexible belt to the side wall of the workpiece through transmission, and the advantage is that the flexible belt can be moved close to the side wall of the workpiece at all times during work;

3) In the present invention, the flexible belt moves close to the side wall of the workpiece, and the labyrinth seal formed by the cooperation of the sealing groove on the A surface of the flexible belt and the sealing teeth of the base body can effectively prevent the leakage of the electrolyte;

4) The movable sealing device of the present invention is matched with the base body through the installation groove, and the disassembly is convenient.

Description of drawings

Fig. 1 is the top view of the assembly schematic diagram of the workpiece, the base body and the movable sealing device according to the embodiment of the present invention;

Fig. 2 is the half sectional view of Fig. 1; The direction of the arrow in the partial enlarged view of the figure is the electrolyte flow direction;

3 is a perspective view of the mobile sealing device of the present invention;

Fig. 4 is the structural representation of the rotating wheel of the present invention;

In the figure, 01-base body; 02-workpiece; 03-movable sealing device;

031-rotating wheel, 032-flexible belt, 033-axle, 034-bearing, 035-supporting shell, 036-pressure spring, 037-telescopic rod, 038-jaw, 039-cylindrical protrusion.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example:

In the process of electrolytic machining of the outer profile of the drawn part by using the lateral flow liquid supply, the substrate moves in translation along the drawing direction of the workpiece. An elastic sealing gasket is arranged between the diversion section and the back pressure section of the base body and the workpiece to prevent leakage of the electrolyte. The purpose of the mobile sealing device for electrolytic machining of the outer profile profile of the drawn part of the present invention is to prevent the side leakage of the electrolyte in the machining section and improve the machining stability.

The present invention provides a mobile electrolytic machining mobile sealing device with an outline profile. As shown in Figures 1 to 3, there are two mobile sealing devices, which are symmetrically arranged in the installation grooves on both sides of the base body 01. Each mobile sealing device Including 4 rotating wheels 031, flexible belts 032, 4 axles 033, 8 bearings 034, support shell 035, 3 pressure springs 036, 3 telescopic rods 037, 2 claws 038;

A pressure spring 036 is arranged between the F surface of the support shell 035 and the base body 01, and the pressure spring 036 is sleeved on the telescopic rod 037 between the support shell 035 and the base body 01; four axles 033 and bearings 034 are arranged on the support On the shell 035, four rotating wheels 031 cooperate with the axle 033 to rotate around the axis of the axle 033. The flexible belt 032 is wound around the rotating wheel 031. The flexible belt 032 should be made of wear-resistant and anti-aging rubber products, such as chlorine Butadiene rubber.

The above-mentioned flexible belt 032 is provided with two annular sealing grooves on the A side, and the B side is provided with a gear tooth structure and annular grooves symmetrically arranged on both sides of the gear teeth; Gear-tooth structure, there are ring sheets on both sides of the gear teeth. When the rotating wheel 031 rotates, the gear teeth meshing can drive the flexible belt 032 to rotate synchronously; The flexible belt 032 falls off; the diameter of the ring on the rotating wheel 031 should be larger than the diameter of the tooth tip circle of the gear tooth structure; see Figure 3 and Figure 4;

The above-mentioned base 01 is composed of a diversion section i, a processing section j and a back pressure section k. As shown in Figure 1 and Figure 2, the electrolyte is diverted and back pressured; the base 01 is arranged directly above the workpiece 02, and the base 01 The lower surfaces of the diversion section i and the back pressure section k are provided with elastic gaskets to cooperate with the surface of the workpiece 02 to prevent electrolyte leakage. The movable sealing device 03 is arranged in the installation grooves on both sides of the base body 01. The purpose of the movable sealing device is to Seal the gap on both sides of the processing section.

Three rectangular blocks are fixed on the E surface of the support shell 035, and the rectangular blocks cooperate with the limit grooves on the base body 01; when the base body 01 translates along the stretching direction of the workpiece 02, the support shell 035 can be driven to move , as shown in Figure 2 and Figure 3.

The above-mentioned sealing grooves and sealing teeth are all rectangular in cross section.

The sealing method of the mobile electrolytic machining mobile sealing device for the profile surface is shown in Figure 2:

During electrolytic machining, the pressure spring 036 arranged on the F surface of the support shell 035 pushes the support shell 035, thereby making the flexible belt 032 close to the side wall of the workpiece; the flexible belt 032 is provided with two annular sealing grooves on its A surface, The sealing groove cooperates with the two sealing teeth on the base body 01 to form a labyrinth seal to prevent the leakage of electrolyte; when paying attention, the width of the two annular sealing grooves on the A surface of the flexible belt 032 should be larger than the width of the base body 01. The width of the sealing teeth, the purpose is that when the flexible belt 032 presses the side wall of the workpiece 02, the side wall of the sealing groove and the side wall of the sealing teeth do not interfere, and the length of the sealing teeth should not be greater than the length of the flexible belt 032 and the side wall of the workpiece 02. length. Claws 038 are hinged on both sides of the support shell 035, and cylindrical protrusions 039 are welded on the base body 01; The side wall is convenient for the disassembly of the base body 01.

During the electrolytic machining process, the pressure of the pressure spring 036 is transmitted to the four rotating wheels 031 through the support shell 035, and the flexible belt 032 can roll against the side wall of the workpiece through the pressing force of the four rotating wheels; The sealing groove on the surface cooperates with the sealing teeth on the base body 01 to form a labyrinth seal, which effectively prevents the leakage of electrolyte.

The content of the present invention is not limited to those listed in the embodiments, and any equivalent transformations taken by those of ordinary skill in the art to the technical solutions of the present invention by reading the description of the present invention are covered by the claims of the present invention.

Claims (9)

1. A mobile electrolytic machining mobile sealing device for the outer profile surface. There are two mobile sealing devices (03), which are respectively installed in the installation grooves on both sides of the base body (01). The base body (01) is formed by a diversion section. , a processing section and a back pressure section; it is characterized in that: the structure of the movable sealing device (03) includes a support shell (035) with a "U"-shaped cross-section, the F surface of the support shell (035) and the base body (01). A pressure spring (036) is arranged between ), a plurality of rotating wheels (031) are evenly arranged in the groove of the support shell (035), and a flexible belt (032) is wound around the plurality of rotating wheels (031). Two annular sealing grooves are provided on the A surface of (032), and the sealing grooves cooperate with the sealing teeth on the base body (01) to form a labyrinth seal; the B surface of the flexible belt (032) is provided with a gear tooth structure and symmetrically arranged on the annular grooves on both sides of the gear teeth; The F surface is the bottom surface of the U-shaped support shell; the A surface is the surface where the upper side of the flexible strip is matched with the base body; the B surface is the inner surface of the flexible strip; the width of the two annular sealing grooves on the A surface of the flexible strip (032) Both are greater than the width of the sealing teeth with which the base body (01) is matched, and the length of the sealing teeth is between the length of the processing section and the length of the flexible belt (032) and the side wall of the workpiece (02). 2 . The mobile electrolytic machining mobile sealing device for profile surface according to claim 1 , wherein the structure of the rotating wheel (031) comprises circular ring sheets on both sides and a circular ring sheet arranged between the circular ring sheets. 3 . In the gear tooth structure matched with the gear teeth of the flexible belt (032), the two annular sheets of the rotating wheel (031) are matched with the annular grooves on both sides of the gear teeth of the flexible belt (032). 3. The mobile electrolytic machining mobile sealing device for the profile surface according to claim 1 or 2, characterized in that: the E surface of the support shell (035) is provided with a limit groove matching with the base body (01). The rectangular block drives the support shell (035) and the base body (01) to move at the same speed through the rectangular block. 4. The mobile electrolytic machining mobile sealing device for profile surface according to claim 3, characterized in that: the rotating wheel (031) is arranged on the wheel shaft (033), and is wound around the wheel shaft (033) by means of a bearing (034). The axis rotates. 5 . The mobile electrolytic machining mobile sealing device for profile surface according to claim 4 , wherein the pressure spring ( 036 ) is sleeved on a telescopic rod between the support shell ( 035 ) and the base body ( 01 ). 6 . (037) on. 6 . The mobile electrolytic machining mobile sealing device for profile surface according to claim 5 , characterized in that claws ( 038 ) are hinged on both sides of the support shell ( 035 ), and the base body ( 01 ) is welded with claws ( 038 ). 7 . Cylindrical protrusions (039) matched with the jaws (038). 7 . The mobile electrolytic machining mobile sealing device for profile profile according to claim 6 , characterized in that: the diameter of the annular sheet on the rotating wheel ( 031 ) is larger than the diameter of the tip circle of the gear tooth structure. 8 . 8 . The mobile electrolytic machining mobile sealing device for outline profile according to claim 7 , wherein: the cross-sections of the sealing grooves and the sealing teeth are all rectangular. 9 . 9. the sealing method of profile profile mobile electrolytic machining mobile sealing device according to claim 1: it is characterized in that: During electrolytic machining, the pressure spring (036) arranged on the F surface of the support shell (035) pushes the support shell (035), thereby making the flexible belt (032) close to the side wall of the workpiece (02); the flexible belt (032) ) are provided with two annular sealing grooves on the A surface of the base (01) to cooperate with the two sealing teeth on the base (01) to form a labyrinth seal to prevent leakage of electrolyte; (01) is welded with cylindrical protrusions (039); after the processing is completed, the claws (038) of the support shell (035) are matched with the cylindrical protrusions (039) on the base (01), that is, the compression spring (036) is pressed. , so that the movable sealing device is kept away from the side wall of the workpiece (02), so as to facilitate the disassembly of the base body (01).

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