CN113894373B - Constant-force electrolytic grinding device - Google Patents

Abstract

The invention discloses a constant-force electrolytic grinding processing device, which comprises an upper connecting flange for connecting with a machine, a lower mounting table is arranged below the upper connecting flange, and a gap is arranged between the upper connecting flange and the lower mounting table In the adjustment component, a lower servo motor, a current detection module and a power supply module are arranged under the lower installation platform, and the output end of the lower servo motor is connected with an electrolytic grinding tool; The workpiece, the electrolytic grinding tool, the workpiece and the electrolyte flowing through the electrolytic grinding tool and the workpiece form a conductive circuit; wherein, when the electrolytic grinding tool grinds the workpiece, the current detection module detects the current in the conductive circuit, and the gap The adjustment assembly adjusts the machining gap between the electrolytic grinding tool and the workpiece according to the current. The invention facilitates fine adjustment and grinding control of the workpiece by adjusting the machining gap, so as to achieve the purpose of controlling the constant contact force.

Description

A constant force electrolytic grinding processing device

technical field

The invention relates to the technical field of grinding processing devices, in particular to a constant-force electrolytic grinding processing device.

Background technique

With the development of aerospace, automobile, energy and other fields, more and more workpieces are more complex, and such workpieces are difficult to process. How to improve the surface quality of such workpieces and ensure their efficient processing and manufacturing has become an urgent need for solutions in related fields. key technology. At present, most of these workpieces are processed by manual grinding, but manual grinding has poor consistency of processing quality, and the grinding accuracy and production efficiency need to be improved.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a constant-force electrolytic grinding device, so as to solve all or one of the problems in the background art.

Based on the above purpose, the present invention provides a constant-force electrolytic grinding processing device, comprising an upper connecting flange for connecting with a machine, a lower mounting platform is arranged below the upper connecting flange, and the upper connecting flange is connected to the machine. A gap adjustment component is arranged between the lower installation platforms,

A lower servo motor, a current detection module and a power supply module are arranged under the lower installation platform, and an electrolytic grinding tool is connected to the output end of the lower servo motor;

The negative pole of the power supply module is connected to the electrolytic grinding tool, the positive pole of the power supply is connected to the workpiece to be processed, and the electrolytic grinding tool, the workpiece and the electrolyte flowing through the electrolytic grinding tool and the workpiece form a conductive loop ;

Wherein, when the electrolytic grinding tool grinds the workpiece, the current detection module detects the current in the conductive loop, and the gap adjustment component adjusts the machining gap between the electrolytic grinding tool and the workpiece according to the current.

Optionally, the current in the conductive loop is inversely proportional to the machining gap,

Among them, i is the current density of the anode surface micro-area in the machining area of the workpiece, I is the current in the conductive loop, Δ is the machining gap, _UR is the ohmic voltage drop of the electrolyte, κ is the conductivity of the electrolyte, and dS is The anode surface micro-area of the machining zone on the workpiece, R is the resistance of the electrolyte, and

Optionally, the gap adjustment assembly includes a lifting piece connected with the upper connecting flange, the lifting piece is connected with an upper connecting plate, and the lower mounting platform is arranged below the upper connecting plate, and the gap adjustment assembly The lifting and lowering movement of the upper connecting plate is controlled according to the lifting member, and the lifting and movement of the electrolytic grinding tool connected under the lower mounting table is controlled to control the machining gap.

Optionally, the lifting member includes an upper servo motor connected with the upper connecting flange, the output end of the upper servo motor is connected with a ball screw through a coupling, and a sliding nut is provided on the ball screw. Vice versa, one side of the ball screw is provided with a guide piece, and the guide piece is movably connected with the upper connecting plate that is fixedly connected with the ball screw.

Optionally, the guide member includes a spline shaft, the spline shaft is connected with a spline sleeve connected with the upper connecting plate, and the splined sleeve is connected with the sliding nut pair through the connecting plate. .

Optionally, the upper connecting plate is connected to the lower connecting plate through at least one tension spring, and a force sensor is arranged between the lower mounting platform and the lower connecting plate.

Optionally, a sealing cover is provided outside the gap adjustment assembly, and the tension spring is located in the sealing cover.

Optionally, the output end of the lower servo motor is connected to the electrolytic grinding tool through a rotating shaft, the current detection module includes a current detector connected to the upper connecting plate, and the rotating shaft is provided with a rotating shaft. There is a conductive slip ring, a carbon brush connected to the current detector is arranged in the conductive slip ring, and the current detection module detects the current in the conductive loop through the carbon brush connected to the current detector.

Optionally, a carbon brush fixing device is fixedly arranged below the lower servo motor, and the carbon brush is placed on the carbon brush fixing device.

Optionally, a chuck is connected under the carbon brush fixing device, at least two claws are arranged on the chuck, and a roller bearing is sandwiched between a plurality of the claws, and the roller bearing is provided. It is sleeved on the outside of the electrolytic grinding tool.

It can be seen from the above that in the constant-force electrolytic grinding processing device provided by the present invention, the lower servo motor starts to drive the electrolytic grinding tool to grind the workpiece to be processed. In addition, the electrolytic grinding tool is connected to the power supply module The negative electrode, the workpiece is connected to the positive electrode of the power supply, and during the grinding process, the electrolyte is sprayed between the electrolytic grinding tool and the workpiece, so that a conductive circuit is formed between the electrolytic grinding tool and the workpiece to be processed, thereby realizing the protection of the workpiece. Electrolytic grinding process, in addition, the current detection module detects the current in the conductive loop formed by the electrolyte flowing through the electrolytic grinding tool and the workpiece, and the gap adjustment component adjusts the machining gap between the electrolytic grinding tool and the workpiece according to the current. , Adjusting the machining gap is convenient for fine-tuning and grinding control of the workpiece, so as to achieve the purpose of controlling the constant contact force, and it is convenient to improve the grinding accuracy, surface quality and production efficiency of the workpiece.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the three-dimensional structure schematic diagram of the embodiment of the present invention;

2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an embodiment of the present invention.

In the figure: upper connecting flange 1, spline shaft 2, upper servo motor 3, coupling 4, sliding nut pair 5, ball screw 6, screw mounting frame 7, connecting plate 8, spline sleeve 9, Sealing cover 10, upper connecting plate 11, current detector 12, hexagon head bolt 13, tension spring 14, lower connecting plate 15, force sensor 16, lower mounting table 17, cable 18, bolt 19, lower servo motor 20, carbon Brush 21 , lower connecting flange 22 , chuck 23 , claws 24 , roller bearing 25 , electrolytic grinding tool 26 , conductive slip ring 27 , carbon brush fixing device 28 .

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 specific embodiments and accompanying drawings.

It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of the present invention shall have the usual meanings understood by those with ordinary skill in the art to which the present disclosure belongs. As used in this disclosure, "first," "second," and similar terms do not denote any order, quantity, or importance, but are merely used to distinguish the various components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

A constant force electrolytic grinding processing device includes an upper connecting flange 1 for connecting with a machine, a lower mounting table 17 is arranged below the upper connecting flange 1, and the upper connecting flange 1 is installed with the lower A gap adjustment assembly is arranged between the platforms 17, a lower servo motor 20, a current detection module and a power supply module are arranged under the lower installation platform 17, and an electrolytic grinding tool 26 is connected to the output end of the lower servo motor 20;

The negative pole of the power module is connected to the electrolytic grinding tool 26, the positive pole of the power supply is connected to the workpiece to be processed, and the electrolytic grinding tool, the workpiece and the electrolyte flowing through the electrolytic grinding tool 26 and the workpiece are formed. conductive loop;

Wherein, when the electrolytic grinding tool 26 grinds the workpiece, the current detection module detects the current in the conductive loop, and the gap adjustment component adjusts the machining gap between the electrolytic grinding tool 26 and the workpiece according to the current.

The lower servo motor 20 starts to drive the electrolytic grinding tool 26 to grind the workpiece to be processed. In addition, the electrolytic grinding tool 26 is connected to the negative pole of the power supply module, the workpiece is connected to the positive pole of the power supply, and during the grinding process, the electrolytic grinding tool 26 is connected to the negative pole of the power supply. Electrolyte is sprayed between the tool 26 and the workpiece, so that a conductive circuit is formed between the electrolytic grinding tool 26 and the workpiece to be processed, thereby realizing the electrolytic grinding process of the workpiece 2, and the current detection module detects the flow through the electrolytic grinding. The current in the conductive loop formed by the electrolyte of the tool 26 and the workpiece, the gap adjustment component adjusts the machining gap between the electrolytic grinding tool 26 and the workpiece according to the current, and the adjustment of the machining gap facilitates fine-tuning and grinding control of the workpiece to The purpose of controlling the constant contact force is accomplished.

The electrolytic grinding tool 26 is provided with a processing table connected to the machine, a conductive placing table is connected to the processing table through a second insulating member, the workpiece is placed on the conductive placing table, and the electrolytic grinding tool 26 The electrolytic solution is sprayed between the electrolytic grinding tool 26 and the workpiece, and the machine controls the current in the conductive loop in the electrolytic grinding to play a rough adjustment. The purpose of controlling the constant contact force is accomplished.

The principle of electrolytic grinding, the electrolytic grinding tool 26 is generally a grinding wheel, the non-conductive abrasive protruding from the surface of the grinding wheel forms a certain machining gap between the workpiece surface and the conductive substrate of the grinding wheel, and at the same time, the electrolyte is supplied to the machining gap, Under the action of the direct current supplied by the power module, the metal on the surface of the workpiece generates ionic compounds due to electrolysis. These electrolysis products are continuously scraped off by the rotating grinding wheel, so that the new metal surface is exposed, and the electrolysis continues to occur, and the workpiece material is continuously removed. To achieve the purpose of grinding, the deeper the abrasive particles between the workpieces are cut into the workpiece, the greater the grinding force, and the smaller the machining gap between the electrolytic grinding tool 26 and the workpiece, resulting in an increase in the electrolytic current.

The current I in the conductive loop is proportional to the contact force,

The resistance R of the electrolyte is:

Formula one:

Wherein, dS is the anode surface micro-area of the machining zone on the workpiece, and Δ is the machining gap;

The current density i of the anode surface micro-area is:

Formula two:

Among them, _UR is the ohmic pressure drop of the electrolyte.

According to formula 1 and formula 2, the relationship between the current in the conductive loop and the machining gap is inversely proportional, and the machining gap and the contact force are inversely proportional, and then the current in the conductive loop and the electrolytic grinding tool 26 during grinding are obtained. The relationship between the contact force between the workpieces is a proportional relationship. By feeding back the current in the conductive loop, adjusting the machining gap according to the feedback gap adjustment component is convenient for the control of workpiece grinding to achieve compensation, and the position of the electrolytic grinding tool 26 is adjusted. Compensation is achieved so that the contact force returns to a constant value.

As an optional implementation manner, the gap adjustment assembly includes a lifting piece connected with the upper connecting flange 1 , the lifting piece is connected with an upper connecting plate 11 , and the upper connecting plate 11 is provided with the The lower mounting table 17, the gap adjustment component controls the lifting and moving of the upper connecting plate 11 according to the lifting member, and controls the lifting and moving of the electrolytic grinding tool 26 connected under the lower mounting table 17 to control the machining gap, and the finishing is completed by fine adjustment. The purpose of controlling the constant contact force.

In order to control the lifting and moving of the upper connecting plate 11 , the lifting member includes an upper servo motor 3 connected with the upper connecting flange 1 , and the output end of the upper servo motor 3 is connected with a ball screw 6 through a coupling 4 . , the ball screw 6 is provided with a sliding nut pair 5, one side of the ball screw 6 is provided with a screw mounting frame 7, one side of the ball screw 6 is provided with a guide, and the guide is movable The upper connecting plate 11 fixedly connected with the ball screw 6 is connected, and the upper servo motor 3 starts to drive the ball screw 6 to rotate, and then drives the sliding nut pair 5 to move up and down, so as to facilitate the lifting and movement of the upper connecting plate 11. control.

Optionally, in order to facilitate the guide for limiting the lifting and lowering of the upper connecting plate 11, the guide member includes a spline shaft 2, and the spline shaft 2 is connected with a spline sleeve 9 connected with the upper connecting plate 11, so The spline sleeve 9 is connected with the sliding nut pair 5 through the connecting plate 8 .

Optionally, in order to facilitate the guidance of restricting the lifting and lowering of the upper connecting plate 11, the guide member includes a guide rail, and a sliding sleeve block connected to the upper end of the upper connecting plate 11 is slidably connected to the guide rail. The sliding nut pair 5 is connected.

Optionally, in order to facilitate the lifting and movement of the upper connecting plate 11, the lifting member includes a driving telescopic rod connected with the connecting frame, and the telescopic end of the driving telescopic rod is connected with the upper connecting plate 11 to drive the telescopic rod. The driving is convenient to drive the upper connecting plate 11 to approach or move away from the force sensor 16 , so as to realize the control of the lifting and moving of the upper connecting plate 11 .

Optionally, the upper connecting plate 11 is connected with a lower connecting plate 15 through at least one tension spring 14, and the upper connecting plate 11 and the tension spring 14 are installed together by hexagon head bolts 13, and the lower connecting plate 11 is installed together. A force sensor 16 is arranged between the table 17 and the lower connecting plate 15, and the upper connecting plate 11 is controlled by the lifting element to move up and down, so as to control the up and down movement of the lower connecting plate 15 connected to the upper connecting plate 11, so as to facilitate the lower connection of the lower mounting table 17. The electrolytic grinding tool 26 moves up and down, and when the lower connecting plate 15 connected to the upper connecting plate 11 moves downward, the lower end of the electrolytic grinding tool 26 contacts the workpiece, and the lower connecting plate 15 moves downward to squeeze the force sensor 16, The electrolytic grinding tool 26 connected under the control installation table 17 presses the workpiece downward for grinding.

Optionally, a sealing cover 10 is provided outside the clearance adjusting assembly, and the tension spring 14 is located in the sealing cover 10 .

As an optional embodiment, the lower mounting table 17 is provided with a connecting flange 22 , and the connecting flange 22 is connected to the casing of the lower servo motor 20 through four bolts 19 , four hexagon head nuts 13 and washers The connection is convenient for the fixed connection between the lower installation platform 17 and the lower servo motor 20 .

As an optional implementation manner, the output end of the lower servo motor 20 and the electrolytic grinding tool 26 are connected through a rotating shaft, and the output end of the lower servo motor 20 and the rotating shaft are connected through a rotating shaft. The first insulating member is connected, the current detection module includes a current detector 12 connected to the upper connecting plate 11, a conductive slip ring 27 is provided on the rotating shaft, and a conductive slip ring 27 is provided in the conductive slip ring 27. The current detector 12 is connected to a carbon brush 21 via a cable 18 , the carbon brush 21 is connected to the cable 18 via a spring, and the current detection module detects the rotation through the carbon brush 21 connected to the current detector 12 The current in the conductive loop is detected by the current of the shaft, the rotating shaft is conductively connected to the electrolyte, and the carbon brush 21 detects the current of the conductive slip ring 27 on the rotating shaft, which is to detect the circuit on the conductive loop, so the current detection module passes the described The carbon brush 21 connected to the current detector 12 detects the current of the rotating shaft to detect the current in the conductive loop.

In order to facilitate the fixing of the carbon brushes, a carbon brush fixing device 28 is fixed below the lower servo motor 20 , the carbon brush 21 is placed on the carbon brush fixing device 28 , and the carbon brush fixing device 28 serves to support and fix the carbon brushes. The brush 21 acts, the carbon brush fixing device 28 is cylindrical, the carbon brush fixing device 28 is provided with a placement opening, the carbon brush 21 is placed at the placement opening, and the carbon brush fixing device 28 sets located outside the rotating shaft.

In order to facilitate the electrolytic grinding tool 26 to be in the center position during grinding and prevent the electrolytic grinding tool 26 from shifting, the carbon brush fixing device 28 is connected with a chuck 23, and the carbon brush fixing device 28 is connected to the chuck through a hexagon socket head bolt. The chuck 23 is provided with at least two claws, and a roller bearing is sandwiched between a plurality of the claws. The roller bearing is sleeved on the outside of the electrolytic grinding tool 26, so that the workpiece is in the When being ground, the electrolytic grinding tool 26 is in the center position, so as to prevent the electrolytic grinding tool 26 from shifting and affecting the grinding quality of the workpiece.

In addition, the negative electrode of the power module is connected to the rotating shaft through a brush.

In the embodiment of the present invention, the workpiece is placed on the conductive placement table of the machine, and the lower servo motor 20 is activated to drive the electrolytic grinding tool 26 to grind the workpiece to be processed. In addition, the electrolytic grinding tool 26 is connected to the power module through the rotating shaft. Negative electrode, the workpiece is connected to the positive electrode of the power supply through the conductive placement table, and during the grinding process, an electrolytic solution is sprayed between the electrolytic grinding tool 26 and the workpiece, so that a conductive loop is formed between the electrolytic grinding tool 26 and the workpiece to be processed. , so as to realize the electrolytic grinding process of the workpiece 2, the current detection module detects the current in the conductive loop formed by the electrolyte that flows through the electrolytic grinding tool 26 and the workpiece, and the machine increases the current in the conductive loop in the electrolytic grinding. The control plays the role of rough adjustment, and the fine adjustment is performed by adjusting the machining gap between the electrolytic grinding tool 26 and the workpiece by the gap adjustment component to achieve the purpose of controlling the constant contact force.

It should be understood by those of ordinary skill in the art that the discussion of any of the above embodiments is only exemplary, and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the spirit of the present disclosure, the above embodiments or Technical features in different embodiments may also be combined, steps may be carried out in any order, and there are many other variations of the different aspects of one or more embodiments of this specification as described above, which are not in detail for the sake of brevity supply.

The embodiment or embodiments of this specification are intended to cover all such alternatives, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of the present specification should be included within the protection scope of the present disclosure.

Claims (10)

1. a constant force electrolytic grinding processing device, is characterized in that, comprises the upper connecting flange (1) that is used to be connected with the machine, and is provided with the lower mounting table (17) below the described upper connecting flange (1), A gap adjustment component is arranged between the upper connecting flange (1) and the lower mounting platform (17), A lower servo motor (20), a current detection module and a power supply module are arranged under the lower installation platform (17), and an electrolytic grinding tool (26) is connected to the output end of the lower servo motor (20); The negative pole of the power supply module is connected to the electrolytic grinding tool (26), the positive pole of the power supply is connected to the workpiece to be processed, and the electrolytic grinding tool, the workpiece and the electrolytic grinding tool (26) and the workpiece flow through the electrolytic grinding tool (26) and the workpiece. The electrolyte forms a conductive circuit; Wherein, when the electrolytic grinding tool (26) grinds the workpiece, the current detection module detects the current in the conductive loop, and the gap adjustment component adjusts the machining gap between the electrolytic grinding tool (26) and the workpiece according to the current . 2. A kind of constant force electrolytic grinding processing device according to claim 1, is characterized in that, the electric current in described conductive loop is inversely proportional to described machining gap,

Among them, i is the current density of the anode surface micro-area in the machining area of the workpiece, I is the current in the conductive loop, Δ is the machining gap, _UR is the ohmic voltage drop of the electrolyte, κ is the conductivity of the electrolyte, and dS is The anode surface micro-area of the machining zone on the workpiece, R is the resistance of the electrolyte, and

3 . The constant force electrolytic grinding processing device according to claim 1 , wherein the gap adjustment component comprises a lifting piece connected with the upper connecting flange ( 1 ), and the lifting piece is connected with a The upper connecting plate (11), the lower mounting platform (17) is arranged below the upper connecting plate (11), and the gap adjustment assembly controls the lifting and moving of the upper connecting plate (11) according to the lifting member, and controls the lower The electrolytic grinding tool (26) connected under the installation table (17) moves up and down to control the machining gap. 4 . The constant force electrolytic grinding processing device according to claim 3 , wherein the lifting member comprises an upper servo motor ( 3 ) connected to the upper connecting flange ( 1 ), and the upper The output end of the servo motor (3) is connected with a ball screw (6) through a coupling (4), a sliding nut pair (5) is arranged on the ball screw (6), and the ball screw (6) A guide piece is arranged on one side, and the upper connecting plate (11) fixedly connected with the ball screw (6) is movably connected on the guide piece. 5. A constant-force electrolytic grinding device according to claim 4, wherein the guide member comprises a spline shaft (2), and the spline shaft (2) is connected with the upper The spline sleeve (9) connected with the connecting plate (11) is connected with the sliding nut pair (5) through the connecting plate (8). 6. The constant-force electrolytic grinding device according to any one of claims 3-5, wherein the upper connecting plate (11) is connected with a lower connecting plate (11) through at least one tension spring (14). 15), a force sensor (16) is arranged between the lower installation platform (17) and the lower connecting plate (15). 7 . The constant force electrolytic grinding processing device according to claim 6 , wherein a sealing cover ( 10 ) is provided outside the gap adjustment component, and the tension spring ( 14 ) is located in the sealing cover 7 . (10). 8. A constant force electrolytic grinding processing device according to claim 1, characterized in that, the output end of the lower servo motor (20) and the electrolytic grinding tool (26) are connected by a rotating shaft , the current detection module includes a current detector (12) connected to the upper connecting plate (11), a conductive slip ring (27) is provided on the rotating shaft, and a conductive slip ring (27) is provided in the conductive slip ring (27) A carbon brush (21) connected to the current detector (12), and the current detection module detects the current in the conductive loop through the carbon brush (21) connected to the current detector (12). 9 . The constant force electrolytic grinding processing device according to claim 8 , wherein a carbon brush fixing device ( 28 ) is fixedly arranged below the lower servo motor ( 20 ), and the carbon brush ( 21 ) placed on the carbon brush holder (28). 10 . The constant force electrolytic grinding processing device according to claim 9 , wherein a chuck ( 23 ) is connected under the carbon brush fixing device ( 28 ), and a chuck ( 23 ) is provided on the chuck ( 23 ). 11 . There are at least two claws, a roller bearing is sandwiched between the plurality of claws, and the roller bearing is sleeved on the outside of the electrolytic grinding tool (26).

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