CN111590772A - Workpiece positioning tool and method for multi-wire cutting machine - Google Patents

Abstract

A workpiece positioning tool and a positioning method of a multi-wire cutting machine are provided with a moving seat, a turnover mechanism, a positioning material pressing mechanism and a vacuum adsorption mechanism; the movable seat is of a frame structure, and the turnover mechanism is assembled on the movable seat; the turnover mechanism comprises a turnover cylinder and a turnover workbench, the bottom of the turnover cylinder is hinged and assembled on the moving seat, the tail end of a telescopic arm of the turnover cylinder is hinged and assembled with the turnover workbench, and the turnover workbench is a square plate and is assembled with the moving seat through a hinge seat arranged on the bottom surface of the turnover workbench; the vacuum adsorption mechanism is provided with a vacuum base and a group of control valves arranged on a gas circuit communicated with the vacuum base, the vacuum base is a rectangular base fixed on the turnover worktable, the central axis of the length direction of the vacuum base is superposed with the diagonal line of the turnover worktable, and a positioning material pressing mechanism is arranged on the vacuum base; the invention avoids the harm to the body of an operator caused by the volatilization of the binder, reduces the workload of cleaning subsequent tablets, and achieves the purposes of improving the working efficiency and reducing the production cost.

Description

A kind of multi-wire cutting machine workpiece positioning tool and positioning method

technical field

The invention relates to a workpiece positioning tool and a positioning method, in particular to a positioning tool and a positioning method suitable for multi-wire cutting machine workpieces without bonding.

Background technique

Multi-wire cutting is a new type of cutting method in which hard and brittle materials such as semiconductors are cut into hundreds of thin slices at the same time through the high-speed reciprocating motion of metal wires to bring abrasives into the semiconductor processing area for grinding. Before the multi-wire cutting machine cuts the material, it is necessary to pre-type according to the external dimensions of the material block to be cut, the thickness and quantity of each material block that can be cut out, and then manually use measuring tools and simple auxiliary tooling to install the material. The material blocks are placed and positioned on the plate, and then the material blocks are fixed on the material plate of the multi-wire cutting machine with the help of adhesive. After the adhesive is completely cured, the material plate with the material blocks is put into the multi-wire cutting machine. in the cutting operation.

The positioning method of the above-mentioned multi-wire cutting machine material block workpiece is generally used to soften the glue layer by heating or boiling the material plate to avoid damage to the cutting material when the material is unloaded after the cutting operation is completed, and then remove the material. Gently remove it, because the removed material will have adhesive residue on the bonding surface, so it is necessary to carefully clean the residue with a blade, especially in the process of bonding some special material blocks, in order to avoid During the cutting operation, the equipment is disconnected and shut down due to the falling off of the material block. It is also necessary to use alkali surface, sheet and other materials to adhere to the surrounding of the material block, which increases the difficulty of cleaning the material in the later stage; when the material block is bonded It is necessary to manually apply glue. Because the special glue is volatile, it will cause certain harm to human health. According to the different properties of the material to be cut, different types of adhesives need to be selected. Because of the difference in curing and softening time, it is difficult to To ensure the consistency of the production rhythm; in addition, in the actual operation process, the positioning of the material block not only needs to be equipped with simulated layout diagrams, measuring tools and simple auxiliary tooling, but also needs to be cut shallow by cutting the marble plate above the material plate. Line marks are used as a reference benchmark. Due to the highly concentrated vision of the operator for a long time, it leads to excessive fatigue and a potential safety hazard.

SUMMARY OF THE INVENTION

The invention provides a multi-wire cutting machine workpiece positioning tool and a positioning method, which aims to avoid the volatilization of the binder causing damage to the operator's body and reduce the subsequent cleaning of the material through the non-adhesive positioning method of the multi-wire cutting machine material block. workload to achieve the purpose of improving work efficiency and reducing production costs.

To achieve the above object, the present invention adopts the following technical solutions:

A workpiece positioning tool for a multi-wire cutting machine is provided with a moving seat, a turning mechanism, a positioning pressing mechanism and a vacuum adsorption mechanism; the moving seat is a frame structure, and a turning mechanism is equipped on the moving seat; the turning mechanism includes a turning A cylinder and an overturning table, the bottom of the overturning cylinder is hingedly assembled on the bottom beam of the frame of the moving base, and the end of the telescopic arm of the overturning cylinder is hingedly assembled with the overturning worktable. The hinge seat on the bottom surface is assembled with the movable seat, and the turning table can be turned upward around the hinge seat in the range of 0 to 45° under the drive of the turning cylinder; The control valve on the road, the vacuum base is a rectangular seat fixed on the turning table, the central axis of its length direction coincides with the diagonal line of the turning table, and a positioning and pressing mechanism is arranged on the vacuum base; the positioning pressure The feeding mechanism is provided with a positioning component and a pressing component. The positioning component cooperates with the turning mechanism to realize the positioning and placement of the material blocks to be cut. After the positioning and placement of the material blocks to be cut is completed, the vacuum adsorption mechanism will adsorb and position the material blocks. Then, the block to be cut is pressed and fixed by the pressing component.

The above-mentioned multi-wire cutting machine workpiece positioning tooling, the positioning assembly includes a positioning bottom plate, a positioning bottom plate side block, a positioning bottom plate front blocking column and a material block positioning pin, the positioning bottom plate is placed on the vacuum base, and a positioning bottom plate is provided on the positioning bottom plate. A set of lateral blocking bosses, and a number of positioning pins for groups of material blocks are installed on the positioning bottom plate; the positioning bottom plate side blocking column is arranged on one side of the bottom plate, and is fixed on the turning table through the side blocking column mounting seat; the positioning bottom plate The front stop is fixed on the vacuum base.

In the above-mentioned multi-wire cutting machine workpiece positioning tool, the positioning bottom plate is provided with adsorption holes that communicate with the vacuum base, and at least two groups of the adsorption holes are arranged between the two sets of laterally adjacent material block positioning pins; The bottom plate is also provided with transversely arranged cutting wire bow fitting grooves.

The above-mentioned multi-wire cutting machine workpiece positioning tooling, the pressure material assembly includes a set of pressure beams, a pressure beam clamp and two clamp bases arranged left and right; the pressure beam is a rectangular arch shape arranged horizontally, and the inner wall of the top beam is a pressure beam. Tighten the working surface, the two ends of the pressure beam are respectively pressed into the left and right clamp bases by the pressure beam clamps; the clamp bases are arranged longitudinally, and the clamp base is provided with a rectangular long groove that matches the two ends of the pressure beam. The inner side of the groove is provided with a set of pressure beam guide columns, and the outer side of the rectangular long groove is provided with a clamp assembly hole; the pressure beam clamp is a hook type clamp placed in the clamp assembly hole, and is provided on the side of each hook type clamp. Clamp stop.

In the above-mentioned multi-wire cutting machine workpiece positioning tool, elastic pads are arranged on the pressing working surface of the pressing beam.

In the above-mentioned multi-wire cutting machine workpiece positioning tool, a cutting line avoidance transverse groove is provided on the pressure beam.

In the above-mentioned multi-wire cutting machine workpiece positioning tool, two wedge-shaped guide surfaces arranged symmetrically are arranged on the upper end surface of the pressure beam guide column.

In the above-mentioned multi-wire cutting machine workpiece positioning tool, a gasket is arranged on the bottom surface of the rectangular long groove of the fixture base.

A multi-wire cutting machine workpiece positioning method, using the above-mentioned multi-wire cutting machine workpiece positioning tooling to complete the non-bonding positioning operation of the workpiece, and the specific operation steps are as follows:

a. The workpiece is placed, the material block is placed on the positioning base plate, a row of material blocks is placed between the adjacent two groups of material block bosses, and a material block is placed between the adjacent two groups of material block positioning pins;

b. The workpiece is flipped and positioned, the telescopic arm of the flipping cylinder is extended, and the flipping table is driven to flip to a certain angle. The positioning bottom plate and the material block placed on the positioning bottom plate slide to the lower corner of the vacuum base under the action of its own gravity. In this process, the position of the positioning bottom plate is first limited by the positioning bottom plate side stopper and the positioning bottom plate front stopper column, and then the front and rear positions of each discharge block are defined by the lateral stopper bosses on the positioning bottom plate, and each discharge block is limited by the material block positioning pins. The left and right positions of a column of blocks;

c. The material block is adsorbed and fixed, and the vacuum adsorption mechanism acts to adsorb and fix the positioned material block on the positioning base plate;

d. The turning table is reset, the telescopic arm of the turning cylinder is retracted, the turning table is reset to the horizontal position, and the positioning bottom plate and the material block workpiece are in a horizontal state;

e. The workpiece is clamped and fixed, and each discharge block is pressed and fixed on the positioning base plate by the pressing beam, and the vacuum adsorption effect of the vacuum adsorption mechanism on the material block is released through the control valve;

f. The positioning base plate and the workpiece enter the multi-wire cutting area, and the entire positioning workpiece has been sent to the feed port of the multi-wire cutting machine through the moving base, and the positioning base plate is transferred to the worktable of the multi-wire cutting machine and fixedly installed to complete the positioning of the workpiece. Operation.

In the above-mentioned method for positioning the workpiece of the multi-wire cutting machine, in the step a, the turning angle of the turning table is 45°.

The invention provides a workpiece positioning tool and a positioning method for a multi-wire cutting machine. The vacuum base is a rectangular seat fixed on the turning table, and its longitudinal center axis coincides with the diagonal line of the turning table, and the positioning bottom plate in the positioning and pressing mechanism is placed on the vacuum base, so with the action of the turning mechanism, The positioning bottom plate and the material blocks placed on the positioning bottom plate slide to the lower corner of the vacuum base under the action of its own gravity. During this process, the position of the positioning bottom plate is first limited by the positioning bottom plate side stopper and the positioning bottom plate front stopper. , and then the front and rear positions of each discharge block are defined by the lateral blocking bosses on the positioning bottom plate, and the left and right positions of each row of material blocks are defined by the material block positioning pins; On the bottom plate, after the turning mechanism drives the positioning pressing mechanism and the vacuum adsorption mechanism to reset, each discharge block is pressed and fixed by the pressing beam to complete the clamping and positioning of the block workpiece. It can be seen that the present invention not only effectively avoids the harm to the health of the operator caused by the volatilization of the adhesive, but also reduces the workload of subsequent material cleaning, and through the cooperation of the turning mechanism and the vacuum adsorption mechanism, reduces the The manual operation link greatly improves the production efficiency and reduces the production cost.

Description of drawings

1 is a schematic structural diagram of a workpiece positioning tool for a multi-wire cutting machine according to the present invention;

Fig. 2 is the A-direction view of Fig. 1;

Figure 3 is a schematic diagram of the positioning and pressing mechanism;

Fig. 4 is the B-direction view of Fig. 3;

Fig. 5 is the top view of Fig. 4;

6 is a schematic diagram of a positioning base plate structure;

7 is a schematic diagram of the structure of the fixture base;

Figure 8 is a schematic diagram of the structure of the pressure beam;

Fig. 9 is the schematic diagram of the working state of the turning mechanism;

Figure 10 is a schematic diagram of the positioning and pressing mechanism in the working state of multi-wire cutting.

The list of labels in the figure is:

1. Mobile seat, 1-1, roller;

2. Turn the cylinder over;

3. Turn the worktable;

4. Positioning and pressing mechanism, 4-1, Positioning bottom plate, 4-1-1, Adsorption hole, 4-1-2, Cutting line bow adapter groove, 4-3, Horizontal stopper boss, 4-2 , Block positioning pin, 4-3, pressure beam, 4-3-1, cutting line avoidance horizontal groove, 4-4, fixture base, 4-4-1, pressure beam guide column, 4-4-2, wedge Guide surface, 4-4-3, Fixture mounting hole, 4-4-4, Rectangular long slot, 4-5, Positioning bottom plate side stopper, 4-6, Side stopper mounting seat, 4-7, Fixture stopper , 4-8, pressing fixture, 4-9, elastic gasket, 4-10, gasket, 4-11, positioning the front stopper of the bottom plate;

5. Vacuum adsorption mechanism, 5-1, vacuum base, 5-2, control valve;

6, material block.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

1 and 2, the present invention provides a multi-wire cutting machine workpiece positioning tooling, which is provided with a moving seat 1, a turning mechanism, a positioning and pressing mechanism 4 and a vacuum adsorption mechanism 5; the moving seat 1 is a frame structure, The moving base 1 is equipped with an overturning mechanism, and rollers 1-1 are provided at the bottom four corners of the frame of the moving base; the overturning mechanism includes an overturning cylinder 2 and an overturning table 3, and the bottom of the overturning cylinder 2 is hingedly assembled on the moving base On the bottom beam of the frame of seat 1, the end of the telescopic arm of the overturning cylinder is hingedly assembled with the overturning table 3. The overturning table 3 is a square plate placed on the moving seat 1, and is assembled with the moving seat 1 through the hinge seat installed on its bottom surface. , under the drive of the turning cylinder 2, the turning table 3 can be turned upward around the hinge seat within the range of 0 to 45°; the vacuum adsorption mechanism 5 is provided with a vacuum base 5-1 and a set of control valves arranged on the air path connecting the vacuum base 5-2, the vacuum base 5-1 is a rectangular seat fixed on the turning table 3, the central axis of its length direction coincides with the diagonal line of the turning table, and the positioning pressing material is arranged on the vacuum base 5-1 Mechanism 4, the control valve 5-2 is a two-position three-way manual valve.

Referring to Figure 3, Figure 4, Figure 5, Figure 9, the multi-wire cutting machine workpiece positioning tooling according to the present invention, its positioning and pressing mechanism 4 is provided with a positioning component and a pressing component, and the positioning component cooperates with the turning mechanism to realize The positioning and placement of the material block 6 to be cut is completed. After the positioning and placement of the material block to be cut is completed, the material block 6 is adsorbed and positioned by the vacuum adsorption mechanism 5. After the reversing mechanism is reset, the material block 6 to be cut is pressed by the pressing component. fixed.

Referring to Figure 3, Figure 4, Figure 5, Figure 6, the multi-wire cutting machine workpiece positioning tooling according to the present invention, the positioning assembly in the positioning and pressing mechanism 4 includes a positioning base plate 4-1, and a positioning base plate side stop column 4-5. , the front stop column 4-11 of the positioning base plate and the material block positioning pin 4-2; the positioning base plate 4-1 is placed on the vacuum base 5-1, and a set of transverse blocking bosses 4 are arranged on the positioning base plate 4-1 -1-3, the front and rear positions of each discharge block are defined by the lateral stopper boss 4-1-3, and several grouping block positioning pins 4-2 are installed on the positioning base plate 4-1, 4-2 defines the left and right positions of each column of material blocks, and the positioning base plate 4-1 is also provided with an adsorption hole 4-1-1 communicating with the vacuum base 5-1 and a horizontally arranged cutting line bow adapter groove 4- 1-2, at least two sets of the adsorption holes 4-1-1 are arranged between two sets of laterally adjacent two sets of material block positioning pins 4-2; the positioning bottom plate side stop columns 4-5 are arranged on the positioning bottom plate 4- 1 On one side, it is fixed on the turning table 3 through the side stop column mounting seat 4-6; the front stop column 4-11 of the positioning bottom plate is fixed on the vacuum base 5-1; The bottom plate side blocking column 4-5 and the positioning bottom plate front blocking column 4-11 are used to define the position of the positioning bottom plate 4-1.

Referring to Figure 3, Figure 4, Figure 5, Figure 7, Figure 8, the multi-wire cutting machine workpiece positioning tooling according to the present invention, the pressing material assembly in the positioning pressing material mechanism 4 includes a set of pressing beams 4-3, pressing beams The clamp 4-8 and the two clamp bases 4-4 arranged on the left and right; the pressure beam 4-3 is in the shape of a horizontally arranged rectangular arch, and the pressure beam 4-3 is provided with a cutting line avoiding transverse groove 4-3-1 , the inner wall of the top beam of the rectangular arch of the compression beam 4-3 is the compression working surface, and elastic pads 4-9 are arranged on the compression working surface. In the left and right clamp bases 4-4; the clamp bases 4-4 are arranged longitudinally, and the clamp base 4-4 is provided with a rectangular long groove 4-4-4 matched with both ends of the pressure beam 4-3. A gasket 4-10 is arranged on the bottom surface of the long groove 4-4-4, and a set of pressure beam guide columns 4-4-1 are arranged on the inner side of the rectangular long groove 4-4-4. The pressure beam guide columns 4-4-1 The upper end surface is provided with two wedge-shaped guide surfaces 4-4-2 symmetrically arranged, and a clamp mounting hole 4-4-3 is provided on the outer side of the rectangular long groove 4-4-4; For the hook-type clamps in the clamp mounting holes 4-4-3, clamp stoppers 4-7 are provided on the sides of each hook-type clamp.

Referring to Fig. 9 and Fig. 10 , the method for positioning the workpiece of the multi-wire cutting machine according to the present invention adopts the above-mentioned multi-wire cutting machine workpiece positioning tooling to complete the non-bonding positioning operation of the workpiece, and the specific operation steps are as follows:

a. Place the workpiece, place the material block 6 on the positioning base plate, place a row of material blocks between the adjacent two groups of material blocking bosses, and place a material block between the adjacent two groups of material block positioning pins;

b. The workpiece is turned over and positioned, the telescopic arm of the turning cylinder 2 is stretched out, and the turning table 3 is driven to turn upward at an angle of 45 º. The positioning base plate 4-1 and the material block 6 placed on the positioning base plate 4-1 are under the action of its own gravity Slide down to the top corner of the lower part of the vacuum base 5-1. During this process, the position of the positioning base plate 4-1 is first limited by the positioning base plate side stop column 4-5 and the positioning base plate front stop column 4-11, and then the positioning base plate 4-1 The upper horizontal stopper boss 4-1-3 defines the front and rear positions of each discharge block, and the left and right positions of each row of material blocks are determined by the block positioning pin limit 4-2;

c. The material block is adsorbed and fixed, and the vacuum adsorption mechanism 5 moves to adsorb and fix the positioned material block 6 on the positioning base plate 4-1;

d. The turning table is reset, the telescopic arm of the turning cylinder 2 is retracted, the turning table 3 is reset to the horizontal position, and the positioning bottom plate 4-1 and the workpiece of the material block 6 are in a horizontal state;

e. The workpiece is clamped and fixed, and each discharge block is pressed and fixed on the positioning base plate 4-1 by the pressing beam 4-3, and the vacuum adsorption effect of the vacuum adsorption mechanism 5 on the material block 6 is released by the control valve 5-2;

f. The positioning base plate and the workpiece enter the multi-wire cutting area, and the entire positioning workpiece has been sent to the feed port of the multi-wire cutting machine through the moving seat (1), and the positioning base plate 4-1 is transferred to the multi-wire cutting machine. Fixed installation to complete the workpiece positioning operation.

Claims (10)

1. A workpiece positioning tool of a multi-wire cutting machine is characterized by comprising a moving seat (1), a turnover mechanism, a positioning material pressing mechanism (4) and a vacuum adsorption mechanism (5); the moving seat (1) is of a frame structure, and the moving seat (1) is provided with a turnover mechanism; the turnover mechanism comprises a turnover cylinder (2) and a turnover workbench (3), the bottom of the turnover cylinder (2) is hinged to a bottom cross beam of a frame of the moving seat (1), the tail end of a telescopic arm of the turnover cylinder is hinged to the turnover workbench (3), the turnover workbench (3) is a square plate arranged on the moving seat (1), and is assembled with the moving seat (1) through a hinge seat arranged on the bottom surface of the turnover workbench, and the turnover workbench (3) can be upwards turned around the hinge seat within the range of 0-45 degrees under the driving of the turnover cylinder (2); the vacuum adsorption mechanism (5) is provided with a vacuum base (5-1) and a group of control valves (5-2) arranged on a gas path communicated with the vacuum base, the vacuum base (5-1) is a rectangular base fixed on the turnover worktable (3), the central axis of the length direction of the vacuum base coincides with the diagonal line of the turnover worktable, and a positioning material pressing mechanism (4) is arranged on the vacuum base (5-1); the positioning and material pressing mechanism (4) is provided with a positioning assembly and a material pressing assembly, the positioning assembly is matched with the turnover mechanism to realize positioning and placing of a material block (6) to be cut, after the material block to be cut is positioned and placed, the material block (6) is adsorbed and positioned by the vacuum adsorption mechanism (5), and the material block (6) to be cut is pressed and fixed by the material pressing assembly after the turnover mechanism is reset.

2. The workpiece positioning tool of the multi-wire cutting machine as claimed in claim 1, wherein the positioning assembly comprises a positioning bottom plate (4-1), a positioning bottom plate side baffle column (4-5), a positioning bottom plate front baffle column (4-11) and a material block positioning pin (4-2); the positioning bottom plate (4-1) is placed on the vacuum base (5-1), a group of transverse material blocking bosses (4-1-3) are arranged on the positioning bottom plate (4-1), and a plurality of group material block positioning pins (4-2) are arranged on the positioning bottom plate (4-1); the side baffle post (4-5) of the positioning bottom plate is arranged on one side of the positioning bottom plate (4-1) and is fixed on the turnover workbench (3) through a side baffle post mounting seat (4-6); the front retaining column (4-11) of the positioning bottom plate is fixed on the vacuum base (5-1).

3. The multi-wire cutting machine workpiece positioning tool according to claim 2, characterized in that the positioning bottom plate (4-1) is provided with adsorption holes (4-1-1) communicated with the vacuum base (5-1), and at least two groups of the adsorption holes (4-1-1) are arranged between two groups of laterally adjacent material block positioning pins (4-2); the positioning bottom plate (4-1) is also provided with a transversely arranged cutting wire arch adapting groove (4-1-2).

4. The multi-wire cutting machine workpiece positioning tool as claimed in claim 1, 2 or 3, wherein the swaging assembly comprises a group of pressing beams (4-3), pressing beam clamps (4-8) and two clamp bases (4-4) arranged left and right; the pressing beam (4-3) is in a shape of a rectangular arch door which is transversely arranged, the inner wall of a top beam of the pressing beam is a pressing working surface, and two ends of the pressing beam (4-3) are respectively pressed in the left clamp base (4-4) and the right clamp base (4-4) through pressing beam clamps (4-8); the clamp bases (4-4) are longitudinally arranged, rectangular long grooves (4-4-4) matched with the two ends of the pressing beams (4-3) are formed in the clamp bases (4-4), a group of pressing beam guide columns (4-4-1) are arranged on the inner sides of the rectangular long grooves (4-4-4), and clamp assembling holes (4-4-3) are formed in the outer sides of the rectangular long grooves (4-4-4); the beam pressing clamps (4-8) are hook-shaped clamps arranged in the clamp assembling holes (4-4-3), and a clamp stop block (4-7) is arranged on the side edge of each hook-shaped clamp.

5. The multi-wire saw workpiece positioning tool as claimed in claim 4, wherein elastic gaskets (4-9) are arranged on the pressing working surfaces of the pressing beams (4-3).

6. The multi-wire saw workpiece positioning tool as claimed in claim 4, wherein the pressing beam (4-3) is provided with a cutting wire avoiding transverse groove (4-3-1).

7. The multi-wire saw workpiece positioning tool as claimed in claim 4, wherein two wedge-shaped guide surfaces (4-4-2) are symmetrically arranged on the upper end surface of the pressing beam guide column (4-4-1).

8. The multi-wire saw workpiece positioning tool as claimed in claim 4, wherein a gasket (4-10) is arranged on the bottom surface of the rectangular long groove (4-4-4) of the clamp base (4-4).

9. The workpiece positioning method of the multi-wire cutting machine is characterized in that the workpiece positioning tool of the multi-wire cutting machine is adopted to complete the non-bonding positioning operation of the workpiece, and the specific operation steps are as follows:

a. placing a workpiece, namely placing material blocks (6) on a positioning bottom plate, placing a row of material blocks between two adjacent material blocking bosses, and placing a material block between two adjacent material block positioning pins;

b. a workpiece is overturned and positioned, a telescopic arm of an overturning cylinder (2) extends out to drive an overturning worktable (3) to overturn for a certain angle, a positioning bottom plate (4-1) and a material block (6) placed on the positioning bottom plate (4-1) slide towards the direction of a lower vertex angle of a vacuum base (5-1) under the action of self gravity, the position of the positioning bottom plate (4-1) is limited by a positioning bottom plate side baffle column (4-5) and a positioning bottom plate front baffle column (4-11), the front and back positions of each row of material blocks are limited by a transverse material blocking boss (4-1-3) on the positioning bottom plate (4-1), and the left and right positions of each row of material blocks are limited by a material block positioning pin (4-2);

c. the material block is adsorbed and fixed, the vacuum adsorption mechanism (5) acts, and the positioned material block (6) is adsorbed and fixed on the positioning bottom plate (4-1);

d. the turnover worktable resets, the telescopic arm of the turnover cylinder (2) retracts, the turnover worktable (3) resets to a horizontal position, and workpieces of the positioning bottom plate (4-1) and the material block (6) are in a horizontal state;

e. clamping and fixing a workpiece, tightly pressing and fixing each discharging block on a positioning bottom plate (4-1) through a pressing beam (4-3), and releasing the vacuum adsorption effect of a vacuum adsorption mechanism (5) on the discharging block (6) through a control valve (5-2);

f. the positioning bottom plate and the workpiece enter a multi-wire cutting area, the positioning workpiece is integrally conveyed to a feed inlet of the multi-wire cutting machine through the movable seat (1), and the positioning bottom plate (4-1) is transferred to a workbench of the multi-wire cutting machine and fixedly installed to complete workpiece positioning operation.

10. The method for positioning the workpieces of the multi-wire cutting machine as claimed in claim 9, wherein in the step a, the overturning angle of the overturning worktable (3) is 45 degrees.

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