A method for wire cutting of stepped sheet parts

Abstract

The application discloses a kind of stepped sheet parts linear cutting processing methods, the method includes the following steps: step 1 draws workpiece graphics, step 2 prepares blank, step 3 drills through silk hole, step 4 installs blank, step 5 position alignment, step 6 adjusts cutting parameter, step 7 starts cutting, step 8 cutting process monitoring, step 9 installs positioning block, step 10 cutting, step 11 checks after cutting, start cutting includes rough cutting cavity and fine cutting cavity, the processing method proposed in the application, by adding positioning block in cavity, the stepped sheet parts are held by positioning block, so that when cutting stepped sheet parts, the bending deformation of stepped sheet parts is avoided, the processing difficulty is greatly reduced, in addition, this processing method is ingeniously designed, and the manufacturing cost is low, and the process is simple, easy to operate, and the skill requirement of operator is low, the processing quality is stable, and suitable for promotion and use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of processing method of stepped sheet parts, in particular to a processing method of stepped sheet parts by wire cutting. BACKGROUND

[0002] The stepped sheet parts in the field of mechanical processing are prone to deformation during processing, the thinnest part of the part is only 0.1mm, and the processing center and other equipment cannot process it. Although the thickness of the part can be ensured to be 0.1mm by directly using wire cutting for cutting, the part is prone to deformation during cutting due to the too thin thickness of the stepped sheet.

[0003] Therefore, a processing method of stepped sheet parts by wire cutting is needed, which is simple in process, convenient to operate and stable in processing quality. SUMMARY

[0004] The present application aims to provide a processing method of stepped sheet parts by wire cutting to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a processing method of stepped sheet parts by wire cutting, characterized in that the method comprises the following steps:

[0006] Step 1: Draw the workpiece pattern, draw the workpiece pattern of the stepped sheet part, and export it as a G code file;

[0007] Step 2: Prepare the blank, clean the surface of the blank to be processed to ensure that the clamping position is free of burrs;

[0008] Step 3: Drill the wire hole, drill the wire hole at the appropriate position according to the size of the stepped sheet part and the blank;

[0009] Step 4: Install the blank, clamp the blank on the numerical control wire cutting machine, and ensure that the blank is fixed firmly;

[0010] Step 5: Position alignment, adjust the position and angle of the blank to ensure the perpendicularity of the blank, then pass the electrode wire into the wire hole, and calibrate the perpendicularity of the electrode wire of the numerical control wire cutting machine;

[0011] Step 6: Adjust the cutting parameters, adjust the cutting parameters of the numerical control wire cutting machine according to the material, thickness and cutting requirements of the blank;

[0012] Step 7: Start cutting, import the G code file exported in step 1 into the numerical control wire cutting machine, and start cutting work;

[0013] 1. Rough cutting cavity, rough cutting the shape of the stepped sheet part, leaving a machining allowance of 0.1-0.15mm;

[0014] 2. Fine cutting the shape cavity, secondary cutting, and removing the machining allowance to cut the shape of the stepped sheet metal part;

[0015] Step 8: Cutting process monitoring, monitoring the working state of the numerical control wire cutting machine tool and the cutting progress of the workpiece during the cutting process;

[0016] Step 9: Install the positioning block, install the positioning block in the shape cavity, one side of the positioning block is attached to the side wall of the stepped sheet metal part, and the other side of the positioning block is attached to the inner wall of the shape cavity;

[0017] Step 10: Cutting, cutting the connection between the stepped sheet metal part and the blank material;

[0018] Step 11: Post-cutting inspection, after the stepped sheet metal part is cut, the machining precision and quality of the finished product are checked, and if there is a problem, the cutting parameters are adjusted according to the actual situation and returned to step 4.

[0019] Preferably, two through holes are drilled in the step 3, and both of the through holes are drilled on the x-axis center line of the blank.

[0020] Preferably, the two through holes are designed to be axisymmetric.

[0021] Preferably, the blank is installed on the numerical control wire cutting machine tool by cantilever support in step 4.

[0022] Preferably, the blank alignment step in step 5 is:

[0023] 1) Set up a horizontal lever gauge on the numerical control wire cutting machine tool, and attach the measuring needle to the surface of the blank;

[0024] 2) Fine-tune the blank by the position of the dial pointer until the blank is aligned.

[0025] Preferably, the electrode wire perpendicularity calibration step in step 5 is:

[0026] 1) Place the perpendicularity calibration detection block on the blank;

[0027] 2) Start the numerical control wire cutting machine tool and power on the electrode wire;

[0028] 3) Attach the perpendicularity calibration detection block to the electrode wire and observe the spark condition;

[0029] 4) If the spark is uniform, the perpendicularity is qualified, otherwise it is unqualified, and fine-tune the electrode wire through the knob.

[0030] Preferably, the residual amount of the rough cutting shape cavity in step 7 is 0.15mm.

[0031] Preferably, the positioning block position fixed in step 9 is set below the blank, and an electric control push rod is installed below the positioning block, and the positioning block is inserted into the cavity by moving the positioning block up and down through the electric control push rod.

[0032] Preferably, after the step 11 is completed, the numerical control wire cutting machine is closed, the cutting is stopped, the workpiece is unloaded, and cleaning is performed, if there is a problem with the part, the problem is traced and analyzed, and corresponding error correction measures are taken.

[0033] Preferably, after the step 11 is completed, the numerical control wire cutting machine is closed, the cutting is stopped, the workpiece is unloaded, and cleaning is performed, if there is a problem with the part, the problem is traced and analyzed, and corresponding error correction measures are taken.

[0034] Compared with the prior art, the beneficial effects of the present application are:

[0035] The machining method provided in the present application avoids the bending deformation of the stepped sheet part during cutting by adding a positioning block in the cavity and supporting the stepped sheet part through the positioning block, thereby greatly reducing the machining difficulty;

[0036] In addition, the machining method is ingenious in design, low in manufacturing cost, simple in process, convenient in operation, low in skill requirement for operators, stable in machining quality, and suitable for popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The present application is a schematic diagram of a sheet part.

[0038] Figure 2 The present application is a schematic diagram of a blank.

[0039] Figure 3 The present application is a schematic diagram of a drilled hole.

[0040] Figure 4 The present application is a schematic diagram of a rough cutting cavity.

[0041] Figure 5 The present application is a schematic diagram of a fine cutting cavity.

[0042] Figure 6 The present application is a schematic diagram of a positioning block.

[0043] Figure 7 The present application is a schematic diagram of a positioning block installation.

[0044] Figure 8 The present application is a schematic diagram of a part cutting. DETAILED DESCRIPTION

[0045] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application. Figures 1-8 The present application provides a technical solution: a wire cutting machining method for stepped sheet parts, characterized in that the method comprises the following steps:

[0047] Step 1: Draw the workpiece pattern, draw the workpiece pattern of the stepped sheet part, and export it as a G code file;

[0048] Step 2: Prepare the blank, clean the surface of the blank to be machined to ensure that the clamping position is free of burrs;

[0049] Step 3: Drill the wire hole, drill the wire hole at the appropriate position according to the size of the stepped sheet part and the blank;

[0050] Step 4: Install the blank, clamp the blank on the numerical control wire cutting machine tool, and ensure that the blank is fixed firmly;

[0051] Step 5: Positioning, adjust the position and angle of the blank to ensure the perpendicularity of the blank, then insert the electrode wire into the wire hole, and calibrate the perpendicularity of the electrode wire of the numerical control wire cutting machine tool;

[0052] Step 6: Adjust the cutting parameters, adjust the cutting parameters of the numerical control wire cutting machine tool according to the blank material, thickness and cutting requirements;

[0053] Step 7: Start cutting, import the G code file exported in step 1 into the numerical control wire cutting machine tool, and start cutting;

[0054] 1. Rough cutting cavity, rough cutting the shape of the stepped sheet part, leaving a machining allowance of 0.1-0.15mm;

[0055] 2. Fine cutting cavity, secondary cutting, cutting off the machining allowance, and fine cutting the shape of the stepped sheet part;

[0056] Step 8: Monitor the cutting process, monitor the working state of the numerical control wire cutting machine tool and the cutting progress of the workpiece during the cutting process;

[0057] Step 9: Install the positioning block, install the positioning block in the cavity, one side of the positioning block is in contact with the side wall of the stepped sheet part, and the other side of the positioning block is in contact with the inner wall of the cavity;

[0058] Step 10: Cut off, cut off the connection between the stepped sheet part and the blank material.

[0059] Step 11: After cutting, check the stepped sheet part after cutting, check the machining accuracy and quality of the finished product, if there is a problem, according to the actual situation, jump to step 4, adjust the cutting parameters again.

[0060] Specifically, two wire threading holes are provided in step 3, and the two wire threading holes are drilled on the x-axis center line of the blank.

[0061] Specifically, the two wire threading holes are designed to be axisymmetric.

[0062] Specifically, in step 4, the blank is installed on the numerical control wire cutting machine by cantilever support.

[0063] Specifically, in step 5, the blank alignment step is:

[0064] 1) Set up a horizontal lever gauge on the numerical control wire cutting machine, and attach the measuring needle to the surface of the blank;

[0065] 2) Adjust the blank by the position of the dial pointer until the blank is adjusted.

[0066] Specifically, in step 5, the electrode wire perpendicularity calibration step is:

[0067] 1) Place the perpendicularity calibration detection block on the blank;

[0068] 2) Start the numerical control wire cutting machine and power on the electrode wire;

[0069] 3) Attach the perpendicularity calibration detection block to the electrode wire and observe the spark condition;

[0070] 4) If the spark is uniform, the perpendicularity is qualified, otherwise it is unqualified, and the electrode wire is adjusted by the knob.

[0071] Specifically, in step 7, the rough cutting cavity is left with a margin of 0.15mm.

[0072] Specifically, in step 9, the positioning block position is fixed, and the positioning block is arranged below the blank. An electric control push rod is installed below the positioning block, which can drive the positioning block to move up and down, so that the positioning block is inserted into the cavity.

[0073] Specifically, in step 11, after the stepped sheet part is machined, the numerical control wire cutting machine is turned off, the cutting is stopped, then the workpiece is removed and cleaned, if the part has a problem, it needs to be traced and analyzed, and appropriate error correction measures are taken.

[0074] Specifically, in step 11, after the stepped sheet part is cut, the finished product needs to be detected in terms of size accuracy, shape accuracy and surface quality.

[0075] Working principle:

[0076] The part is processed into a blank shown in Fig. 1, and the length of the blank is the length dimension of the part (dimension 30 mm in Fig. 1);

[0077] Then, according to the shape of the part, a through hole 2 is drilled at a suitable position in Fig. 2, and the blank is installed on a line cutting machine in a cantilever support manner, and is aligned;

[0078] Then, the inner cavity is cut twice, rough cutting and fine cutting, the rough cutting leaves a fine cutting allowance of 0.15 mm, and the fine cutting ensures the thickness dimension of the sheet (dimension 0.1 mm, 0.3 mm in Fig. 5);

[0079] After the cutting is completed, the control electric push rod is pushed out, and the positioning blocks (a total of 4) are pushed into the cavity, positioning block 1 and positioning block 2 in Fig. 7 correspond Figure 6 to the l1 dimension positioning block, positioning block 3 and positioning block 4 correspond Figure 6 to the l2 dimension positioning block, the positioning block l dimension cooperates with the inner cavity L gap, and the gap is 0.001-0.003 mm;

[0080] At the position shown in Fig. 6, Figure 8 cutting is performed to ensure the width dimension of the part (dimension 2 mm in Fig. 1).

[0081] The stepped sheet processing method is simple, the manufacturing cost is low, the non-cutting connection at both ends can ensure the thickness dimension of the stepped sheet, the thickness dimension is stable, the positioning block can effectively prevent the deformation of the part during cutting, and the width dimension is stable.

[0082] The size of the positioning block is given according to the size of the part, when processing sheets of different thicknesses, the size of the positioning block can be changed, that is, the processing of sheets of different thicknesses can be realized.

[0083] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0084] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A wire EDM method for machining stepped thin plate parts, characterized in that, The method includes the following steps: Step 1: Draw the workpiece drawing. Draw the workpiece drawing of the stepped thin plate part and export it as a G-code file; Step 2: Prepare the blank, clean the surface of the blank to be processed, and ensure that there are no burrs at the clamping position; Step 3: Drill the threading holes. Drill the threading holes at appropriate locations according to the size of the stepped thin plate part and the blank. Step 4: Install the blank. Clamp the blank on the CNC wire cutting machine and ensure that the blank is firmly fixed. Step 5: Positioning and alignment: Adjust the position and angle of the blank to ensure its perpendicularity. Then, thread the electrode wire into the wire threading hole and calibrate the perpendicularity of the electrode wire on the CNC wire EDM machine. Step 6: Adjust the cutting parameters. Adjust the cutting parameters of the CNC wire EDM machine according to the blank material, thickness and cutting requirements. Step 7: Start cutting. Import the G-code file exported in Step 1 into the CNC wire cutting machine and begin cutting. 1) Rough cut the cavity and the outer shape of the stepped thin plate part, leaving a machining allowance of 0.1-0.15mm; 2) Precision cutting of the cavity, secondary cutting to remove the machining allowance, and precision cutting of the outer shape of the trapezoidal thin plate part; Step 8: Monitoring the cutting process. During the cutting process, monitor the working status of the CNC wire cutting machine and the cutting progress of the workpiece. Step 9: Install the positioning block. Install the positioning block inside the cavity. One side of the positioning block is attached to the side wall of the stepped sheet part, and the other side of the positioning block is attached to the inner wall of the cavity. Step 10: Cutting, cut the connection between the stepped sheet metal part and the blank material; Step 11: Post-cutting inspection. After the stepped thin plate parts are cut, the processing accuracy and quality of the finished product are checked. If any problems are found, proceed to step 4 according to the actual situation and readjust the cutting parameters.

2. The wire EDM machining method for stepped thin plate parts according to claim 1, characterized in that: In step 3, two wire-threading holes are drilled, and both wire-threading holes are drilled on the x-axis center line of the blank.

3. The wire EDM machining method for stepped thin plate parts according to claim 2, characterized in that: The two wire-threading holes are designed to be axially symmetrical.

4. The wire EDM machining method for stepped thin plate parts according to claim 1, characterized in that: In step 4, the blank is mounted on the CNC wire cutting machine tool by means of cantilever support.

5. The wire EDM machining method for stepped thin plate parts according to claim 1, characterized in that: The blank alignment step in step 5 is as follows: 1) Set up a horizontal lever gauge on the CNC wire cutting machine and place the probe against the surface of the blank; 2) Adjust the blank by using the position of the dial pointer until the blank is properly aligned.

6. The wire EDM machining method for stepped thin plate parts according to claim 1, characterized in that: The electrode wire verticality calibration step in step 5 is as follows: 1) Place the verticality calibration test block on the blank; 2) Start the CNC wire cutting machine and energize the electrode wire; 3) Attach the perpendicularity calibration test block to the electrode wire and observe the sparking. 4) If the spark is uniform, the verticality is qualified; otherwise, it is unqualified. Fine-tune the electrode wire by turning the knob.

7. The wire EDM machining method for stepped thin plate parts according to claim 1, characterized in that: The allowance left for the roughing of the cavity in step 7 is 0.15mm.

8. The wire EDM method for machining stepped thin plate parts according to claim 1, characterized in that: The positioning block proposed in step 9 is fixed in position. The positioning block is set below the blank, and an electrically controlled push rod is installed below the positioning block. The electrically controlled push rod can drive the positioning block to move up and down, so that the positioning block is inserted into the cavity.

9. The wire EDM method for machining stepped thin plate parts according to claim 1, characterized in that: After the stepped thin plate part in step 11 is processed, the CNC wire cutting machine is turned off and cutting is stopped. Then the workpiece is unloaded and cleaned. If there is a problem with the part, it is necessary to trace and analyze the cause and take corresponding corrective measures.

10. A wire EDM method for machining stepped thin plate parts according to claim 1, characterized in that: After the stepped thin plate parts are cut in step 11, the finished products need to be inspected for dimensional accuracy, shape accuracy and surface quality.

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