TWI790786B - Workpiece Positioning Mechanism for Electrochemical Machining Machine - Google Patents

Abstract

A workpiece positioning mechanism for an electrochemical processing machine, which includes a machine body, an auxiliary support device, a rotary indexing table and a vertical support body, the auxiliary support device is installed on the machine body and includes a plurality of pier seats distributed and fixed on the periphery of the machine platform of the machine body, And the beam frame that is located above the machine platform and connected to multiple bridge piers, the rotary indexing table is installed on the machine table, the vertical support is located on the work platform of the rotary indexing table and located below the beam frame, and performs electrochemical electrochemistry of the workpiece. During processing, the workpiece is fixed on the workpiece carrier of the rotary indexing table to provide the basic lower support for the workpiece, and the vertical support inside the workpiece combined with the beam frame connected by multiple bridge piers provides upper support for the workpiece, so that The workpiece positioning mechanism can provide a higher rigid clamping effect on the workpiece by the dual support of the upper and lower, effectively resist the high lateral thrust of the high-voltage electrochemical fluid acting on the workpiece, and obtain high precision machining accuracy.

Description

Workpiece Positioning Mechanism for Electrochemical Machining Machine

The invention relates to a large electrochemical processing machine, especially the workpiece positioning mechanism of the electrochemical processing machine.

The currently known electrochemical machining machine consists of a body, a rotary indexing table set in the body, and a group or a plurality of workstations arranged on the periphery of the body, and the workstation has a motion axis that can move linearly , the end of the movement shaft facing the rotary indexing table is provided with a shaft electrode.

When the electrochemical machining machine performs the electric discharge machining operation of the workpiece, it locks the workpiece to be processed on the rotary indexing table, and secondly, uses the workstation around the machine body to control the movement axis end of the linear motion. The shaft electrode extends to the workpiece fixed on the rotary indexing table, and outputs the electrochemical liquid through the shaft electrode. The shaft electrode is given a negative polarity voltage, and the workpiece is given a positive polarity voltage. The electrochemical liquid is sprayed towards the workpiece at high pressure, and when the shaft electrode is very close to the workpiece until there is only a small gap between them, electrochemical corrosion occurs between the positive and negative electrodes to remove the surface material of the workpiece.

However, the current large-scale electrochemical processing machine is based on the demand for large power transmission, and its processing electrode area often exceeds 100 cm ² or more. In contrast, the pressure of the high-voltage electrochemical liquid applied to the workpiece is about 10 bar. Therefore, the workpiece must withstand at least 1000 Action force and reaction force around Kg. Such fluid force is a great thrust for the workpiece. Due to the existing electrochemical machining machines, during the electrochemical machining process, the force of the fluid is likely to cause a large overturning and deviation of the workpiece, which will affect the machining accuracy of the workpiece.

In addition, the existing electrochemical machining machine is to apply positive polarity voltage from the upper and lower ends of the workpiece, and to apply negative polarity voltage to the workpiece from the side of the workpiece through the axial electrode of the movement axis of the workstation, so the electrochemical machining operation is performed on the workpiece At this time, there is a problem that the current path through the workpiece is too long, and the electrochemical machining performance is not good.

The purpose of the present invention is to provide a workpiece positioning mechanism for an electrochemical processing machine, which is used to solve the problem that when the existing large-scale electrochemical processing machine is used, the workpiece is easily turned over and deviated due to the pressure of the high-voltage electrochemical liquid, which affects the workpiece. The problem of machining accuracy.

In order to achieve the above-mentioned purpose, the workpiece positioning mechanism of the electrochemical processing machine proposed by the present invention includes: A machine body, which includes a machine platform and a base located on the periphery of the machine platform; An auxiliary support device, which is installed on the body, the auxiliary support device includes a plurality of pier bases and a girder frame, the plurality of pier bases are distributed on the base, the girder frame is located above the machine platform and connects the plurality of pier bases seat; A rotary indexing table, which is installed on the machine platform and located below the beam frame, the rotary indexing table includes a workpiece carrier that can be driven to rotate horizontally; and A vertical support body, which is installed on the workpiece carrier and located below the beam frame, the vertical support body can be driven to rotate synchronously with the workpiece carrier platform, and the vertical support body can be controlled to be relatively clutched to the beam frame .

With the above-mentioned workpiece positioning mechanism of the electrochemical processing machine, it mainly uses the workpiece carrier of the rotary indexing table to provide workpiece placement and positioning, and provides the basic lower support of the workpiece. In addition, the vertical support body located in the workpiece is combined with a plurality of piers. The beam frame connected with the seat provides upper support for the workpiece, so that the workpiece positioning mechanism can provide a higher rigid clamping effect on the workpiece by the upper and lower dual support functions, and effectively resist the action of the high-voltage electrochemical liquid on the workpiece. High lateral thrust for high precision machining.

The workpiece positioning mechanism of the electrochemical processing machine of the present invention can further utilize that the vertical support body includes a support column and a plurality of power connectors distributed on the peripheral surface of the support column, each of the power connectors is connected to a voltage supply source, and the The power connector can be in close contact with the inner peripheral wall of the workpiece to be processed and give a positive polarity voltage, so that the workpiece positioning mechanism of the present invention can apply a positive polarity voltage to the workpiece by using the power connectors distributed around the vertical support body when the workpiece is performing electrochemical machining operations , with the shaft electrode of the movement axis of the workstation giving a negative voltage to the workpiece, the current path through the workpiece is shortened, and the electrochemical machining performance is improved. On the other hand, the plurality of power connectors distributed on the peripheral side of the vertical support body are pressed against the inner peripheral wall of the workpiece at the same time to provide an auxiliary fixing effect on the workpiece.

As shown in Figure 1, it discloses a preferred embodiment of the workpiece positioning mechanism of the electrochemical processing machine of the present invention. It can be known from the drawing that the workpiece positioning mechanism includes a body 10, an auxiliary supporting device 20, a rotating The index table 30 and a vertical support body 40 .

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 5, the machine body 10 includes a machine platform 11 and a base 12 surrounding the outer periphery of the machine platform 11, and the center of the machine platform 11 is defined along the vertical direction A central axis 100 extends. The machine body 10 can be combined with one or more workstations 50 on the outside of the base 12, and the workpiece 60 to be processed can be given a negative polarity voltage through the workstation 50 and a high-pressure electrochemical liquid can be sprayed on the processing part of the workpiece 60. The workstation 50 It is a known mechanism, basically, each workstation 50 has a linear motion axis that can be independently controlled to generate a linear motion, and the linear motion axis is set towards the head plate at one end of the central axis 100 of the machine table 11. There is a shaft electrode, which can be given a voltage of negative polarity, and can pass through the center of the shaft electrode to spray electrochemical liquid at high pressure toward the workpiece 60 to be processed.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 5, the auxiliary support device 20 is installed on the body 10, and the auxiliary support device 20 includes a plurality of pier seats 21 and a girder frame 22, and the pier seat 21 And the beam frame 22 is a rigid component, the plurality of pier seats 21 are distributed on the base 12 of the body 10, preferably, the number of the pier seats 21 is 2 to 4, in this preferred embodiment It is disclosed that there are three pier seats 21 . The plurality of pier bases 21 are equiangularly distributed on the base 12 of the machine body 10 relative to the central axis 100 , and the beam frame 22 is located above the machine platform 11 and connected to the plurality of pier bases 21 .

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 5, in this preferred embodiment, the beam frame 22 includes a beam frame central part 221 and a plurality of supporting beams 222, and the beam frame central part 221 is located on the machine platform 11 directly above, preferably, the central axis 100 passes through the center of the beam frame central part 221 . The plurality of supporting crossbeams 222 are distributed and connected to the periphery of the beam frame central part 221 and respectively connected to the upper ends of the corresponding pier seats 21 . In this preferred embodiment, the plurality of pier seats 21 are equiangularly distributed with respect to the central axis 100 on the base 12 of the machine body 10, and the plurality of support beams 222 respectively connected to the plurality of pier seats 21 are relatively to the machine body. The central axis 100 of the platform 11 is also distributed at an equal angle. Thereby, the force acting on the beam frame central part 221 of the beam frame 22 can be distributed and transferred to each pier seat 21 . In addition, the plurality of pier seats 21 can also be arranged on the base 12 of the machine body 10 at unequal angles relative to the central axis 100 , and the plurality of support beams 222 connecting the plurality of abutment seats 21 relative to the center of the machine platform 11 The axes 100 are distributed at different angles, and the space configuration changes according to the actual product planning and use environment, and it is better to balance and disperse the force acting on the beam frame center part 221 of the beam frame 22, so that it can be used The technical effect of transferring the active force distribution of the beam frame central part 221 acting on the beam frame 22 to each pier seat 21 .

As shown in Fig. 1, Fig. 4 and Fig. 5, the rotary indexing table 30 is installed on the machine platform 11 of the machine body 10, and is located below the beam frame 22. The rotary indexing table 30 includes a workpiece carrier The workpiece carrier 31 can be controlled and driven to rotate horizontally at a predetermined angle with the central axis 100 as the axis. The workpiece carrier 31 can provide the workpiece 60 to be processed to be placed and locked after the center is aligned.

As shown in Fig. 1, Fig. 4 and Fig. 5, this vertical support body 40 is installed on the workpiece stage 31 of this rotary indexing table 30, and is positioned at the below of this beam frame 22, and this vertical support body 40 can be with The workpiece carrier 31 is driven to rotate synchronously together, and the vertical support body 40 can be controlled to be relatively clutched with the beam frame 22. When the vertical support body 40 is connected to the beam frame 22, it is vertically supported by the rotary indexing table 30. The lower end of the body 40 provides a lower support, and the auxiliary support device 20 provides an upper support to the upper end of the vertical support body 40. When the force applied to the vertical support body 40, in addition to utilizing the rotary indexing table 30 to bear, it can also be used. The force is transmitted to the beam frame 22 on the upper end of the vertical support body 40 , and transferred to the plurality of pier seats 21 in a dispersed manner.

As shown in Figure 1, Figure 4 and Figure 5, in this preferred embodiment, the vertical support body 40 is located on the central axis 100, the vertical support body 40 includes a support column 41 and is distributed on the support column 41 A plurality of power connectors 42 on the peripheral surface, each power connector 42 is connected to a voltage supply source, and the power connector 42 can closely contact the inner peripheral wall of the workpiece 60 to be processed and give a positive polarity voltage, the vertical support body 40 A clamp 43 capable of controlled movement is provided at the top, the clamp 43 is located directly below the central part of the beam center part 221 , and the clamp 43 can be controlled to be relatively clutched with the beam center part 221 . In this preferred embodiment, the collet 43 can be a pneumatic collet 43 that is connected to an external air supply source and can be controlled to expand and contract. The collet 43 can also be a component driven by other power sources.

As shown in Fig. 1, Fig. 2, Fig. 6 and Fig. 7, regarding the use of the workpiece positioning mechanism of the electrochemical processing machine of the present invention, the workpiece 60 to be processed is placed on the outside of the vertical support body 40, and the bottom of the workpiece 60 The end abuts on the workpiece carrier 31 of the rotary indexing table 30, and can start the plurality of power connectors 42 distributed on the peripheral side of the vertical support body 40 to respectively abut against the inner peripheral wall of the workpiece 60. The beam frame 22 is located on the workpiece 60 The top of the vertical support body 40 is combined with the clamp 43 at the top of the vertical support body 40 and the central part 221 of the fixed beam frame is controlled and relatively clamped and fixed on the upper platen 61 arranged at the top of the workpiece 60 . In this way, the workpiece carrier 31 of the rotary indexing table 30 is used to provide the positioning of the workpiece 60 and provide the basic lower support of the workpiece 60. In addition, the vertical support body 40 located in the workpiece 60 is combined with the beams connected by the plurality of abutments 21. The frame 22 provides upper support for the workpiece 60 , so that the upper and lower double support functions provide a higher rigid clamping effect for the workpiece 60 .

Secondly, through the plurality of power connectors 42 distributed around the vertical support body 40, the workpiece 60 to be processed is given a positive polarity voltage, and the work station 50 set around the machine body 10 is controlled to extend the shaft electrode at the end of the movement axis to the rotating shaft. The workpiece 60 on the indexing table 30 outputs the electrochemical liquid through the shaft electrode, and the shaft electrode is given a negative polarity voltage. When the shaft electrode slowly advances toward the workpiece 60, the electrochemical liquid is ejected from the center of the shaft electrode toward the workpiece 60 at high pressure at the same time. When the shaft electrode is very close to the workpiece 60 and there is only a very small gap between them, electrochemical corrosion will occur between the positive and negative electrodes to remove the surface material of the workpiece 60 .

When the workpiece 60 is to be rotated to change the electrochemical machining position, before the rotary index table 30 rotates, the chuck 43 is controlled to break away from the center part 221 of the beam frame, and then the rotary index table 30 and the workpiece 60 on it are driven to rotate together. After the rotary indexing table 30 and the workpiece 60 on it rotate to a predetermined angle to the target machining position, the chuck 43 is driven to re-clamp and fix the central part 221 of the beam frame, and the electrochemical machining operation of the workpiece 60 is continued.

The workpiece positioning mechanism of the present invention applies a positive polarity voltage to the workpiece 60 by using the power connectors 42 distributed around the vertical support body 40 when the workpiece 60 performs electrochemical machining operations, and applies a negative polarity voltage to the workpiece 60 in conjunction with the axis electrode of the movement axis of the workstation 50 The method of voltage shortens the current path passing through the workpiece 60 to improve the performance of electrochemical machining. On the other hand, the workpiece positioning mechanism of the present invention provides a high-rigidity clamping effect on the workpiece 60 through the upper and lower double support functions, which can effectively resist the high lateral thrust of the high-voltage electrochemical liquid acting on the workpiece 60, and make the workpiece 60 maintains good positioning effect and stability, and can obtain high precision machining accuracy in the electrochemical machining process. In addition, the workpiece positioning mechanism of the present invention can further utilize the plurality of power connectors 42 distributed around the vertical support body 40 to simultaneously press against the inner peripheral wall of the workpiece 60 to provide an auxiliary fixing effect on the workpiece 60 .

10: Body 100: central axis 11: machine 12: base 20: Auxiliary support device 21: Pier seat 22: beam frame 221: Central part of beam frame 222: Support beam 30: Rotary indexing table 31: Workpiece carrier 40: vertical support body 41: Support column 42: Power connector 43: Chuck 50:Workstation 60: Workpiece 61: upper platen

Fig. 1 is a three-dimensional schematic diagram of a preferred embodiment of the workpiece positioning mechanism of the electrochemical processing machine of the present invention. Fig. 2 is a top plan view of a plurality of workstations arranged around the preferred embodiment of the workpiece positioning mechanism shown in Fig. 1 . Fig. 3 is a three-dimensional schematic view of the machine table and auxiliary support device in the preferred embodiment of the workpiece positioning mechanism shown in Fig. 1 . Fig. 4 is a three-dimensional schematic diagram of a rotary indexing table and a vertical support in a preferred embodiment of the workpiece positioning mechanism shown in Fig. 1 . Three-dimensional schematic diagram of the vertical support. Fig. 5 is a schematic side view plan view of a preferred embodiment of the workpiece positioning mechanism shown in Fig. 1 . Fig. 6 is a schematic side view plan view of the preferred embodiment of the workpiece positioning mechanism shown in Fig. 1 after the workpiece is installed. FIG. 7 is a partially enlarged schematic view of FIG. 6 .

10: Body

100: central axis

11: machine

12: Base

20: Auxiliary support device

21: Pier seat

22: beam frame

221: Central part of beam frame

222: Support beam

30: Rotary indexing table

31: Workpiece carrier

40: vertical support body

Claims (5)

A workpiece positioning mechanism for an electrochemical processing machine, comprising: a machine body, which includes a machine table and a base located on the periphery of the machine table, the center of the machine table defines a central axis extending along the vertical direction; a Auxiliary support device, which is installed on the machine body, the auxiliary support device includes a plurality of pier bases and a beam frame, the plurality of pier bases are distributed on the base, the beam frame is located above the machine platform and connects the plurality of pier bases , wherein the beam frame includes a beam frame central part and a plurality of supporting beams, the beam frame central part is located directly above the machine platform, the central axis passes through the center of the beam frame central part, and the plurality of supporting beams are distributed and connected to The periphery of the center part of the beam frame is connected to the upper end of the corresponding pier seat respectively; a rotary indexing table is installed on the machine platform and is located below the beam frame, and the rotary indexing table can include A workpiece platform driven to rotate horizontally; and a vertical support body, which is installed on the workpiece platform and located below the beam frame, the vertical support body can be driven to rotate synchronously with the workpiece platform, and the The vertical supporting body can be controlled to be relatively clutched with the beam frame. The workpiece positioning mechanism for an electrochemical processing machine as described in claim 1, wherein the plurality of pier seats are arranged on the base of the machine body at an equiangular distribution relative to the central axis, and the plurality of abutment seats are arranged in a direction relative to the central axis equiangular distribution. The workpiece positioning mechanism for an electrochemical processing machine according to claim 1, wherein the plurality of pier seats are arranged on the base of the machine body at unequal angles relative to the central axis, and the plurality of abutment seats are arranged on the base of the machine body relative to the central axis Distributed at different angles. The workpiece positioning mechanism for an electrochemical machine according to any one of claims 1 to 3, wherein the vertical support body includes a support column, and a plurality of Power connectors, each of which is used to abut against the inner peripheral wall of a workpiece and apply positive polarity voltage. The workpiece positioning mechanism of the electrochemical processing machine as claimed in claim 4, wherein the top of the support column is provided with a chuck that can be controlled to be relatively clutched to the beam frame.

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