CN115488449A

CN115488449A - Spark-erosion wire cutting digit control machine tool with positioning mechanism

Info

Publication number: CN115488449A
Application number: CN202211268819.7A
Authority: CN
Inventors: 陈芳; 赵成峰; 张璇
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2022-12-20

Abstract

The invention relates to the technical field of workpiece positioning of a wire cut electric discharge machine tool, in particular to a wire cut electric discharge machine tool with a positioning mechanism. The cutting machine comprises a cutting machine frame and a longitudinal moving frame arranged on the upper side of the cutting machine frame and used for longitudinally moving, a transverse moving frame used for transversely moving is arranged on the upper side of the longitudinal moving frame, a cutting head is arranged on the upper side of the cutting machine frame, and a clamping mechanism used for positioning a workpiece is arranged on the transverse moving frame. The workpiece is supported by the plurality of supporting mechanisms, so that the position of the workpiece is fixed, the position of the supporting mechanisms is adjusted according to the appearance of the workpiece in the process of fixing the workpiece, the special-shaped workpiece can be directly produced, the replacement of a clamp during cutting of different workpieces is avoided, the speed of fixing the workpiece is increased, meanwhile, the supporting mechanisms clamp and position the side walls of the workpiece, the trouble that the workpiece cutting is influenced due to the fact that the upper side of the workpiece is shielded is avoided, and the workpiece is convenient to process.

Description

Spark-erosion wire cutting digit control machine tool with positioning mechanism

Technical Field

The invention relates to the technical field of workpiece positioning of numerical control machine tools, in particular to a wire cut electric discharge machine tool with a positioning mechanism.

Background

The numerically controlled machine tool for electrospark wire-electrode cutting is to generate spark between electrodes to erode certain gap, and continuously discharge pulses to cut out the workpiece with required shape and size.

Before the work piece carries out the line cutting, can fix the work piece to this makes things convenient for the cutting of wire pair work piece, at present at the in-process of cutting the work piece, the fixed position of work piece can't remove, can only change the position of work piece cutting through base sideslip, and to the position that needs to cut out the inclination, just can cut to the position of work piece readjustment, the speed of work piece cutting is slow, and the step of cutting is loaded down with trivial details, simultaneously when fixed to the work piece, can't carry out corresponding location according to the shape of work piece to the anchor clamps of work piece fixing, make when cutting special-shaped work piece, it is troublesome to fix a position the work piece, so need a positioning mechanism who is convenient for fixed work piece and conveniently adjusts work piece cutting angle to cut the work piece.

Disclosure of Invention

The invention aims to provide a wire cut electric discharge machine tool with a positioning mechanism, which aims to solve the problems in the background technology.

In order to achieve the purpose, the wire-cut electric discharge machine with the positioning mechanism comprises a cutting rack and a longitudinal moving frame which is arranged on the upper side of the cutting rack and can move longitudinally, a transverse moving frame which can move transversely is arranged on the upper side of the longitudinal moving frame, a cutting head is arranged on the upper side of the cutting rack, a clamping mechanism which can position a workpiece is mounted on the transverse moving frame, the cutting head can cut the workpiece positioned by the clamping mechanism in a wire-cut manner, the clamping mechanism can be correspondingly positioned according to the shape of the workpiece, the placing position of the workpiece can be adjusted according to the cutting angle of the workpiece after the positioning is completed, a cutting included angle is formed between the workpiece and a cutting metal wire, and meanwhile, in the process that the clamping mechanism adjusts the included angle of the workpiece, the longitudinal moving frame and the transverse moving frame drive the clamping mechanism to move on the horizontal plane, so that the workpiece is cut into a specified shape.

As a further improvement of the technical scheme, the clamping mechanism comprises a positioning and mounting mechanism and a plurality of supporting mechanisms arranged inside the positioning and mounting mechanism, the positioning and mounting mechanism and the traversing frame are connected with each other, the supporting mechanisms clamp and position a workpiece to be positioned, meanwhile, a plurality of angle adjusting mechanisms are arranged on the lower side of the positioning and mounting mechanism and support the positioning and mounting mechanism and the supporting mechanisms, and the placing positions of the positioning and mounting mechanism and the supporting mechanisms are adjusted in the supporting process.

As a further improvement of the technical scheme, the positioning and installing mechanism comprises a positioning frame, the positioning frame is arranged in the middle of the transverse moving frame, hinged frames are symmetrically fixed at positions, close to four corners, in the positioning frame, and the bearing mechanism and the hinged frames are correspondingly arranged.

As a further improvement of the technical scheme, the bearing mechanism comprises a bearing strip and a hinge joint fixed at one end of the bearing strip, the hinge joint is hinged with the hinge frame, the upper surface of the bearing strip is contacted with the bottom of a workpiece, and the bearing strips are matched with each other to bear and receive the workpiece.

As a further improvement of the technical scheme, a threaded rod is arranged on the upper side of the bearing strip, an extrusion head is installed at one end of the threaded rod, one end of the extrusion head is in contact with the side face of the workpiece, and the extrusion head extrudes the workpiece to fix the workpiece and is matched with the bearing strip to fix the position of the workpiece.

As a further improvement of the technical scheme, a thread block is connected to the threaded rod in a threaded mode, a driving block is arranged on the outer side of the thread block, a limiting plate is fixed to the upper side of the hinged frame, a transverse sliding groove is formed in the limiting plate, and the driving block is arranged inside the transverse sliding groove in a sliding mode.

As a further improvement of the technical scheme, a rotary groove is formed in the driving block, the thread block is hinged inside the rotary groove, and the thread block slides up and down in the rotary groove.

As a further improvement of the technical scheme, the angle adjusting mechanism comprises a threaded lead screw, a lead screw nut is connected to the threaded lead screw in a threaded manner, a connecting rod covering the threaded lead screw is arranged on the upper side of the threaded lead screw, one end of the connecting rod is hinged to the lead screw nut, the other end of the connecting rod is hinged to a connecting plate, the connecting plate is in screw connection with the side wall of the positioning frame, adjusting mounting grooves are formed in four inner corners of the transverse frame, the threaded lead screw is rotatably arranged in the adjusting mounting grooves, a cavity is formed between the two adjusting mounting grooves on the same side, a driving motor driving the threaded lead screw to rotate is arranged in the cavity, the driving motor drives the threaded lead screw to rotate, the threaded lead screw drives the lead screw to move through driving the lead screw nut, and the connecting rod moves the connecting plate and the positioning frame upwards.

As a further improvement of the technical scheme, the upside of the hinged joint is rotatably connected with a limiting strip, a transverse sliding groove is formed in the limiting strip, one end of the threaded rod penetrates through the transverse sliding groove and extends out, and the limiting strip moves up and down on the upside of the hinged joint.

As a further improvement of the technical scheme, a sliding groove is formed in the upper side of the bearing strip, a sliding block is arranged inside the sliding groove in a sliding mode, a bandage is tied to the sliding block, and the squeezing head is pulled downwards by the bandage.

Compared with the prior art, the invention has the beneficial effects that:

1. among this spark-erosion wire cutting digit control machine tool with positioning mechanism, accept the work piece through a plurality of receiving mechanism, make the position of work piece fixed, and at fixed work piece's in-process, the position that receiving mechanism put is adjusted according to the appearance of work piece, make special-shaped work piece can direct production, the change of carrying out anchor clamps when cutting different work pieces has been avoided, accelerate the fixed speed of work piece, receiving mechanism carries out the centre gripping location to the lateral wall of work piece simultaneously, the trouble of sheltering from the work piece upside and influencing the work piece cutting has been removed, make things convenient for the processing of work piece.

2. According to the wire cut electric discharge machine tool with the positioning mechanism, the four corners of the positioning and installing mechanism are supported through the angle adjusting mechanism, so that the clamping mechanism and the workpiece are driven by the angle adjusting mechanism to adjust the horizontal angle, the workpiece can be cut without adjusting the position of the workpiece when the workpiece cuts an inclination angle by using a wire cutting method, the workpiece machining speed is increased, the cutting shape of the cutting machine tool is more various, and the use scene of the cutting device is increased.

3. According to the electric spark wire cutting numerical control machine tool with the positioning mechanism, the position of the bearing mechanism is adjusted according to the cutting position of the workpiece, so that the horizontal placing position of the workpiece is adjusted when the bearing mechanism clamps the workpiece, the fixed horizontal position of the workpiece is variable in the process of clamping the workpiece, the workpiece is adjusted by the angle adjusting mechanism, and the workpiece is convenient to cut a special-shaped cutting surface.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the cross-sliding frame and clamping mechanism assembly of the present invention;

FIG. 3 is a schematic view of the cross-sliding frame and angle adjusting mechanism assembly of the present invention;

FIG. 4 is a schematic view of a clamping mechanism of the present invention clamping a workpiece;

FIG. 5 is a schematic view of a clamping mechanism according to the present invention;

FIG. 6 is a schematic structural view of a positioning and mounting mechanism of the present invention;

FIG. 7 is a schematic view of a receiving mechanism according to the present invention;

FIG. 8 is a schematic view of a portion of the receiving mechanism of the present invention;

fig. 9 is a schematic structural view of the angle adjusting mechanism driving the clamping mechanism to adjust the angle according to the present invention.

The various reference numbers in the figures mean:

1. a cutter frame; 2. longitudinally moving the frame; 3. a transverse moving frame; 31. adjusting the mounting groove; 32. a threaded lead screw; 33. a connecting rod; 34. a feed screw nut; 35. a connecting plate; 4. a cutting head; 5. a clamping mechanism;

51. a positioning and mounting mechanism; 511. a positioning frame; 512. a hinged frame; 513. a limiting plate; 514. a horizontal chute;

52. a carrying mechanism; 521. carrying out strip bearing; 5211. a chute; 522. a hinge joint; 523. driving the block; 5231. rotating the groove; 5232. a thread block; 5233. a spring; 524. a threaded rod; 525. an extrusion head; 526. a slider; 527. a bandage; 528. and a restriction strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Example 1

The workpiece is fixed before the workpiece is cut by a wire, so that the workpiece can be conveniently cut by a metal wire, the fixed position of the workpiece cannot move in the process of cutting the workpiece at present, the cutting position of the workpiece can only be changed by traversing the base, the position of the workpiece needing to be cut at an inclination angle can be cut only by readjusting the position of the workpiece, the cutting speed of the workpiece is slow, the cutting step is complicated, meanwhile, when the workpiece is fixed, a clamp for fixing the workpiece cannot correspondingly position according to the shape of the workpiece, so that the workpiece is troublesome to position when the special-shaped workpiece is cut, and therefore, a positioning mechanism which is convenient for fixing the workpiece and conveniently adjusting the cutting angle of the workpiece is needed for cutting the workpiece, in order to solve the above-mentioned problems, please refer to fig. 1, an object of the present embodiment is to provide a wire-cut electrical discharge machining numerical control machine with a positioning mechanism, which includes a cutting frame 1 and a longitudinal moving frame 2 disposed on an upper side of the cutting frame 1 for longitudinal movement, a transverse moving frame 3 disposed on an upper side of the longitudinal moving frame 2 for transverse movement, a cutting head 4 disposed on an upper side of the cutting frame 1, a clamping mechanism 5 mounted on the transverse moving frame 3 for positioning a workpiece, wherein the cutting head 4 performs wire-cut electrical discharge machining on the workpiece positioned by the clamping mechanism 5, the clamping mechanism 5 is driven by the longitudinal moving frame 2 and the transverse moving frame 3 to move on a horizontal plane, and the cutting head 4 cuts the workpiece by releasing a metal wire, so as to cut the workpiece.

And the clamping mechanism 5 can correspondingly position according to the shape of the workpiece in the process of clamping the workpiece, and the placing position of the workpiece is adjusted according to the cutting angle required by the workpiece after the positioning is finished, so that a cutting included angle is formed between the workpiece and the cutting metal wire, meanwhile, in the process of adjusting the included angle of the workpiece by the clamping mechanism 5, the longitudinal moving frame 2 and the transverse moving frame 3 drive the clamping mechanism 5 to move on the horizontal plane, so that the workpiece is cut into a specified shape, the special-shaped cutting of the workpiece by the cutting head 4 is finished, the range of the device for cutting the workpiece is enlarged, and the special-shaped workpiece can be cut by the cutting head 4.

In order to enable the clamping mechanism 5 to position the special-shaped workpiece, referring to fig. 1-9, the clamping mechanism 5 includes a positioning and mounting mechanism 51, the positioning and mounting mechanism 51 includes a positioning frame 511, the positioning frame 511 is U-shaped, one side of an opening of the positioning frame 511 is provided with a direction close to the cutting head 4, the workpiece is arranged inside the positioning frame 511, the positioning frame 511 is arranged at a middle position of the traversing frame 3, a plurality of supporting mechanisms 52 are arranged inside the positioning and mounting mechanism 51, the plurality of supporting mechanisms 52 clamp and position the workpiece to be positioned, so that the position of the workpiece is fixed, and the plurality of supporting mechanisms 52 clamp the workpiece, so that the position of the workpiece is fixed.

Meanwhile, in order to enable the bearing mechanism 52 to conveniently clamp a special-shaped workpiece, the bearing mechanism 52 adjusts the angle in the positioning and mounting mechanism 51, so as to conveniently clamp the special-shaped workpiece, wherein the bearing mechanism 52 comprises a bearing strip 521 and a hinge 522 fixed at one end of the bearing strip 521, hinge brackets 512 are symmetrically fixed at positions close to four corners in the positioning frame 511, the bearing mechanism 52 and the hinge brackets 512 are correspondingly arranged, the hinge 522 and the hinge brackets 512 are hinged together, the upper surface of the bearing strip 521 is in contact with the bottom of the workpiece, a plurality of bearing strips 521 are matched with each other to bear the workpiece, in order to enable the workpiece to be fixed on the bearing strip 521, a threaded rod 524 is arranged on the upper side of the bearing strip 521, an extrusion head 525 is installed at one end of the threaded rod 524, one end of the extrusion head 525 is in contact with the side surface of the workpiece, and a plurality of extrusion heads 525 extrude and fix the workpiece by extruding the workpiece and matching with the bearing strip 521.

In order to reduce the friction between the extrusion head 525 and the workpiece and improve the friction between the extrusion head 525 and the workpiece, a rubber sheet is arranged at one end of the extrusion head 525, when the extrusion head 525 clamps the workpiece, the rubber sheet is contacted with the workpiece, the contact stability of the extrusion head 525 and the workpiece is improved through the friction between the rubber sheet and the workpiece, and meanwhile, the abrasion of the extrusion head 525 to the workpiece is reduced through the isolation of the rubber sheet.

In order to enable the threaded rod 524 to have a force for extruding the extrusion head 525, a threaded block 5232 is connected to the threaded rod 524 in a threaded manner, a driving block 523 is arranged on the outer side of the threaded block 5232, a rotating groove 5231 is formed in the driving block 523, the threaded block 5232 is hinged inside the rotating groove 5231, the threaded block 5232 slides up and down in the rotating groove 5231, a limiting plate 513 is fixed on the upper side of the hinge frame 512, a transverse sliding groove 514 is formed in the limiting plate 513, the driving block 523 is arranged inside the transverse sliding groove 514 in a sliding manner, the position of the threaded block 5232 is fixed through the sliding fit of the driving block 523 and the transverse sliding groove 514, when the threaded rod 524 rotates, one end of the extrusion head 525 is close to the workpiece through the threaded fit of the threaded rod 524 and the threaded block 5232, the workpiece is clamped by the extrusion heads 525, the workpiece is fixed, and the extrusion heads 52 fix the workpiece according to the shape of the side wall of the workpiece, so that the special-shaped workpiece is convenient for fixing of the plurality of the support mechanisms 52.

In order to facilitate the rotation of the receiving mechanisms 52, the screw block 5232 is hinged in the rotating groove 5231, and to limit the rotation range of the screw block 5232 and avoid the collision between two receiving mechanisms 52 located on the same side, the two sides of the rotating groove 5231 are provided with inward-recessed triangles, after the screw block 5232 is driven by the threaded rod 524 to rotate for a certain angle, the side wall of the screw block 5232 is in contact with the side wall of the rotating groove 5231, so that the rotating groove 5231 blocks the rotation of the screw block 5232, the rotation angle of the screw block 5232 is further limited, and the problem that the receiving strips 521 collide with each other due to the fact that the rotation angle of the two receiving mechanisms 52 is too large is avoided.

Meanwhile, when the bearing mechanism 52 is rotated, the driving block 523 is pushed by the rotation of the thread block 5232, the driving block 523 slides in the transverse sliding groove 514, in order to facilitate the return of the driving block 523 to the original position, springs 5233 are installed on two sides of the driving block 523, when the driving block 523 moves transversely in the transverse sliding groove 514, the driving block 523 presses the springs 5233 to contract, and when the driving block 523 does not press the springs 5233, the springs 5233 push the driving block 523 to return to the original position, so that the angle of the threaded rod 524 can be conveniently adjusted.

And stability when in order to strengthen threaded rod 524 uses, the upside at articulated joint 522 is rotated and is connected with restriction strip 528, horizontal spout has been seted up on restriction strip 528, the one end of threaded rod 524 runs through horizontal spout and extends away, and restriction strip 528 reciprocates on articulated joint 522 upside, in the in-process of threaded rod 524 swivelling movement, restriction strip 528 restricts the rotatory angle of threaded rod 524, the cooperation drives the restriction of piece 523 to threaded rod 524 rotation angle, ensure the rotatory scope of threaded rod 524, avoid the condition of striking because of the rotation angle is too big to appear between two threaded rods 524.

Meanwhile, in order to improve the stability of positioning a workpiece after the workpiece is clamped and received by the receiving mechanism 52, a sliding groove 5211 is formed in the upper side of the receiving bar 521, a sliding block 526 is arranged in the sliding groove 5211 in a sliding mode, a bandage 527 is tied on the sliding block 526, the bandage 527 pulls the extrusion head 525 downwards, so that the extrusion head 525 extruding the workpiece is pulled to have a downward force, and then the bottom of the workpiece is tightly attached to the receiving bar 521 through the friction force between a rubber sheet mounted at one end of the extrusion head 525 and the workpiece, so that the effect of fixing the workpiece by the receiving mechanism 52 is improved.

In order to enable the clamping mechanism 5 to drive the workpiece to change the angle on the horizontal plane, and enable the metal wire to generate an inclined surface on the workpiece when the workpiece is cut, the workpiece can be cut into an inclined angle, so that the situation that the workpiece is separately clamped and positioned when the workpiece is cut at an inclined angle is avoided, and the production speed of the workpiece is accelerated, therefore, a plurality of angle adjusting mechanisms are arranged on the lower side of the positioning and mounting mechanism 51, the angle adjusting mechanisms support the positioning and mounting mechanism 51 and the bearing mechanism 52, and the placing positions of the positioning and mounting mechanism 51 and the bearing mechanism 52 are adjusted in the supporting process, so that the angle of the workpiece can be changed.

Meanwhile, in order to facilitate the fixing of the position of the clamping mechanism 5, the positioning and mounting mechanism 51 and the transverse moving frame 3 are connected with each other, and the connecting position between the positioning and mounting mechanism 51 and the transverse moving frame 3 is connected through an angle adjusting mechanism, wherein the angle adjusting mechanism specifically comprises the following components:

the angle adjusting mechanism comprises a threaded screw rod 32, a screw rod nut 34 is in threaded connection with the threaded screw rod 32, a connecting rod 33 covering the threaded screw rod 32 is arranged on the upper side of the threaded screw rod 32, the connecting rod 33 is covered on the threaded screw rod 32, the threaded screw rod 32 is arranged in the middle of the connecting rod 33, one end of the connecting rod 33 is hinged with the screw rod nut 34, the other end of the connecting rod 33 is hinged with a connecting plate 35, the connecting plate 35 is in screw connection with the side wall of the positioning frame 511, adjusting mounting grooves 31 are formed in four corners inside the transverse moving frame 3, the threaded screw rod 32 is rotatably arranged in the adjusting mounting grooves 31, a cavity is formed between the two adjusting mounting grooves 31 on the same side, a driving motor for driving the threaded screw rod 32 to rotate is arranged in the cavity, the driving motor drives the threaded screw rod 32 to rotate, the threaded screw rod 32 drives the screw rod nut 34 to move, the connecting rod 33 moves the connecting plate 35 and the positioning frame 511 upwards, the angle of the positioning frame 511 is moved upwards, when the four corners of the positioning frame 511 simultaneously move upwards, the workpiece moves upwards, the workpiece is moved on the mounting mechanism 52 and the workpiece on the transverse moving frame 511, the workpiece is rotated, the workpiece is inclined workpiece cutting device, the workpiece cutting device is inclined workpiece cutting device, and the workpiece cutting device is accelerated.

Meanwhile, in order to facilitate the device to cut a workpiece with a large inclination angle, the upper side of the receiving strip 521 is set to be in an inclined state, the workpiece is received at different positions of the receiving strip 521 according to the inclination angle required to be cut by the workpiece, so that the fixed inclination of the workpiece is determined, and meanwhile, the included angle between the workpiece and the horizontal plane is changed when the workpiece is fixed by the receiving mechanism 52, so that the workpiece is conveniently cut by the metal wire.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an electric spark wire-electrode cutting digit control machine tool with positioning mechanism, includes cutting frame (1) and sets up and carry out the indulging of longitudinal movement at cutting frame (1) upside and move frame (2), the upside of indulging moving frame (2) is provided with and carries out lateral shifting frame (3) of lateral movement, and the upside of cutting frame (1) is provided with cutting head (4), install fixture (5) that advance line location to the work piece on the sideslip frame (3), and cutting head (4) carry out electric spark wire-electrode cutting to the work piece of fixture (5) location, its characterized in that: the clamping mechanism (5) is correspondingly positioned according to the shape of the workpiece, the placing position of the workpiece is adjusted according to the cutting angle of the workpiece after the positioning is finished, a cutting included angle is formed between the workpiece and a cutting metal wire, and meanwhile, in the process that the clamping mechanism (5) adjusts the included angle of the workpiece, the longitudinal moving frame (2) and the transverse moving frame (3) drive the clamping mechanism (5) to move on the horizontal plane, so that the workpiece is cut into a specified shape.

2. The wire electric discharge machine tool with a positioning mechanism according to claim 1, characterized in that: the clamping mechanism (5) comprises a positioning installation mechanism (51) and a plurality of bearing mechanisms (52) arranged inside the positioning installation mechanism (51), the positioning installation mechanism (51) and the traversing frame (3) are connected with each other, the plurality of bearing mechanisms (52) clamp and position workpieces to be positioned, meanwhile, a plurality of angle adjusting mechanisms are arranged on the lower side of the positioning installation mechanism (51), the positioning installation mechanism (51) and the bearing mechanisms (52) are supported by the angle adjusting mechanisms, and the placing positions of the positioning installation mechanism (51) and the bearing mechanisms (52) are adjusted in the supporting process.

3. The wire electric discharge machine tool with a positioning mechanism according to claim 2, characterized in that: location installation mechanism (51) are including locating frame (511), locating frame (511) set up the middle part position in sideslip frame (3), and the position symmetry that the inside of locating frame (511) is close to the four corners is fixed with articulated frame (512), the corresponding setting in position of supporting mechanism (52) and articulated frame (512).

4. The wire electric discharge machine tool with positioning mechanism of claim 3, characterized in that: the bearing mechanism (52) comprises bearing strips (521) and a hinge joint (522) fixed at one end of each bearing strip (521), the hinge joint (522) is hinged to a hinge frame (512), the upper surface of each bearing strip (521) is contacted with the bottom of a workpiece, and the bearing strips (521) are matched with each other to bear the workpiece.

5. The wire electric discharge machine tool with a positioning mechanism according to claim 4, characterized in that: the upper side of accepting strip (521) is provided with threaded rod (524), extrusion head (525) are installed to the one end of threaded rod (524), the one end and the work piece side contact of extrusion head (525), a plurality of extrusion head (525) extrusion work piece is fixed with the work piece extrusion to the cooperation is accepted strip (521) and is fixed the position of work piece.

6. The wire electric discharge machine tool with a positioning mechanism according to claim 5, characterized in that: threaded connection has screw block (5232) on threaded rod (524), just the outside of screw block (5232) is provided with drives piece (523), the upside of articulated frame (512) is fixed with limiting plate (513), horizontal spout (514) have been seted up on limiting plate (513), it slides the inside that sets up at horizontal spout (514) to drive piece (523).

7. The wire electric discharge machine tool with positioning mechanism of claim 6, characterized in that: the driving block (523) is provided with a rotary groove (5231), the thread block (5232) is hinged inside the rotary groove (5231), and the thread block (5232) slides up and down in the rotary groove (5231).

8. The wire electric discharge machine tool with a positioning mechanism according to claim 2, characterized in that: the angle adjusting mechanism comprises a threaded screw rod (32), a screw nut (34) is connected to the threaded screw rod (32) in a threaded mode, a connecting rod (33) covering the threaded screw rod (32) is arranged on the upper side of the threaded screw rod (32), one end of the connecting rod (33) is hinged to the screw nut (34), the other end of the connecting rod (33) is hinged to a connecting plate (35), the connecting plate (35) is connected with a side wall of the positioning frame (511) through screws, adjusting mounting grooves (31) are formed in four corners inside the transverse moving frame (3), the threaded screw rod (32) is rotatably arranged in the adjusting mounting grooves (31), a cavity is formed between the two adjusting mounting grooves (31) located on the same side, a driving motor for driving the threaded screw rod (32) to rotate is arranged in the cavity, the threaded screw rod (32) is driven to move through the screw nut (34), and the connecting rod (33) enables the connecting plate (35) and the positioning frame (511) to move upwards.

9. The wire electric discharge machine tool with a positioning mechanism according to claim 5, characterized in that: the upside of articulated joint (522) is rotated and is connected with restriction strip (528), horizontal spout has been seted up on restriction strip (528), the one end of threaded rod (524) is run through horizontal spout and is extended out, just restriction strip (528) reciprocate on articulated joint (522) upside.

10. The wire electric discharge machine tool with a positioning mechanism according to claim 4, characterized in that: the upper side of the bearing strip (521) is provided with a sliding groove (5211), a sliding block (526) is arranged in the sliding groove (5211) in a sliding manner, a bandage (527) is tied to the sliding block (526), and the extrusion head (525) is pulled downwards by the bandage (527).