Machining method for opening of guide shaft support

Abstract

The invention relates to the field of machining, in particular to a machining method for an opening of a guide shaft support. The guide shaft support comprises a support body, a shaft sleeve and a bolt, the shaft sleeve and the support body are hollow circular rings, the shaft sleeve is fixedly connected to the inner circle position of the support body, first screw holes are evenly distributed in the circular ring surface of the support body, and the shaft sleeve is provided with a first opening perpendicular to the plane direction of the support body and a second opening parallel to the plane direction of the support body. The shaft sleeve is provided with a plurality of second screw holes which are parallel to the plane direction of the support, penetrate through the outer wall of the shaft sleeve and are vertically and symmetrically distributed along the outer wall, and bolts can penetrate through the second screw holes and are in threaded connection with the shaft sleeve. The machining method for the opening of the guide shaft support comprises the steps of guide shaft support pretreatment, clamping and positioning, linear cutting machining parameter setting, linear cutting machining and aftertreatment. And the opening of the guide shaft support can be quickly and accurately machined according to a preset shape path through the linear cutting technology, and the opening is kept to have good precision.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, and in particular to a processing method for an opening of a guide shaft support. Background Art

[0002] The guide shaft support is a key component in many mechanical equipment, and it is usually necessary to set an opening to meet specific installation, debugging or operation requirements. At present, there are many shortcomings in the processing method of the guide shaft support opening. The traditional processing method often adopts a simple cutting process, which easily leads to rough opening edges and low dimensional accuracy. In addition, during the processing, it may have an adverse effect on the overall structural strength of the guide shaft support, reducing the reliability and service life of the guide shaft support. In addition, the existing processing methods are inefficient and difficult to meet the needs of large-scale production. At the same time, the processing cost is also high, which is not conducive to the economic benefits of the enterprise. Therefore, there is an urgent need for a new, efficient and precise guide shaft support opening processing method. Summary of the invention

[0003] In view of the above problems, the present invention provides a method for processing an opening of a guide shaft support to solve the problems of poor opening quality, low processing efficiency and high cost existing in the existing processing methods.

[0004] The present invention provides a method for processing an opening of a guide shaft support, wherein the guide shaft support comprises a support, a sleeve and a bolt, wherein the sleeve and the support are both hollow circular rings, the sleeve is fixedly connected to the inner circle position of the support, the circular ring surface of the support has uniformly arranged first screw holes, the sleeve has a first opening perpendicular to the plane direction of the support and a second opening parallel to the plane direction of the support, the sleeve has a plurality of second screw holes parallel to the plane direction of the support and passing through the outer wall of the sleeve and symmetrically distributed along the outer wall, the bolt passes through the second screw holes and is threadedly fixedly connected to the sleeve, and the processing method comprises:

[0005] Guide shaft support preprocessing steps: select metal material to make the guide shaft support blank, and then re-process the blank.

[0006] Clamping and positioning steps: Place the pre-processed blank on the workbench of the wire cutting machine and clamp it with a customized fixture.

[0007] Wire cutting processing parameter setting steps: Select the wire cutting wire according to the material and thickness of the guide shaft support. The cutting length of the wire cutting wire should not be less than the outer diameter of the sleeve.

[0008] Wire cutting processing steps: start the wire cutting machine, and after the wire cutting wire is preheated, bring it close to the end face of the sleeve away from the support, so that the midpoint of the wire cutting wire passes through the center of the end face and the length direction of the wire cutting wire is perpendicular to the axial direction of the second screw hole, and then insert the wire cutting wire into the sleeve in the direction perpendicular to the plane of the support until it moves a first preset distance, and a first opening is formed from the end face to the end point of the first preset distance; then, pivot the wire cutting wire along the center of the sleeve until it rotates a first preset angle, and a second opening is formed at the position from the end point of the first preset distance to the end point of the first preset angle.

[0009] Post-processing steps: stop the wire cutting machine, remove the wire cutting wire from the guide shaft support, and clean the processed guide shaft support.

[0010] Optionally, in the guide shaft support pretreatment step, the blank material is selected to be stainless steel.

[0011] Optionally, in the clamping and positioning step, the clamp is made of hardened steel material.

[0012] Optionally, in the step of setting the wire cutting processing parameters, the types of wire cutting wires include molybdenum wires and brass wires.

[0013] Optionally, in the wire cutting process step, the first preset distance is not less than the outer diameter of the sleeve, and the first preset angle range is 60°-120°.

[0014] Optionally, the wire cutting machine is equipped with an automatic wire threading device, and the wire threading speed range of the automatic wire threading device is 6m / s-12m / s.

[0015] Optionally, in the wire cutting processing step, the contact position between the guide shaft support and the wire cutting wire is kept eluted with cutting liquid, and the flow rate of the cutting liquid is controlled at 10L / min-15L / min.

[0016] Optionally, in the wire cutting processing step, the moving path of the wire cutting wire is controlled by a numerical control system of the wire cutting machine.

[0017] Optionally, in the post-processing step, ultrasonic cleaning is used to clean the guide shaft support.

[0018] Optionally, the processing method further includes a wire cutting wire detection step to monitor the discharge state, processing current and voltage of the wire cutting wire in real time.

[0019] The present invention applies the wire cutting technology to the guide shaft support opening processing, and sets the movement track of the wire cutting wire in the guide shaft support through the wire cutting machine, so that the guide shaft support can process two openings at one time, and the surface roughness of the guide shaft support opening after wire cutting is low. Even for the guide shaft support opening with a complex shape, the wire cutting technology can quickly and accurately process it according to the preset shape path, while maintaining the opening shape accuracy well. In addition, the efficient opening processing method can also reduce the production cost of the guide shaft support with an opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural front view of a guide shaft support provided in an embodiment of the present invention.

[0021] Figure 2 It is a structural left view of a guide shaft support provided in an embodiment of the present invention.

[0022] Figure 3 It is a right side view of the structure of a guide shaft support provided in an embodiment of the present invention.

[0023] Figure 4 It is a flow chart of a method for processing a guide shaft support opening in an embodiment of the present invention.

[0024] Figure markings: 100-guide shaft support, 1-sleeve, 11-first opening, 12-second opening, 13-second screw hole, 14-end face, 2-support, 21-first screw hole, 3-bolt, 4-guide shaft hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] refer to Figure 1 and Figure 2, the guide shaft support 100 includes a support 2, a sleeve 1 and a bolt 3. The sleeve 1 and the support 2 are both hollow rings. The sleeve 1 is fixedly connected to the inner circle of the support 2. The surface of the ring of the support 2 has evenly arranged first screw holes 21. When the guide shaft support needs to be installed on the base of the equipment (not shown in the figure) or the workbench, the support 2 can be accurately positioned through the first screw holes 21, and the support 2 can be fixed with suitable bolts (not shown in the figure) to ensure that the support 2 will not be displaced during the operation of the equipment. In the prior art, in order to be able to more conveniently disassemble and assemble the guide shaft into the guide shaft hole 4 of the guide shaft support 100, it is usually necessary to set an opening at the position of the sleeve 1 of the guide shaft support 100. In this embodiment, refer to Figure 1 , Figure 2 and Figure 3 The sleeve 1 has a first opening 11 perpendicular to the plane direction of the support 2 and a second opening 12 parallel to the plane direction of the support 2. At the same time, the sleeve 1 also has a plurality of second screw holes 13 parallel to the plane direction of the support 2 and passing through the outer wall of the sleeve 1 and symmetrically distributed along the outer wall. When the guide shaft (not shown in the figure) is installed to the preset position of the guide shaft hole 4 of the guide shaft support 100, the bolt 3 is passed through the second screw hole 13 and the first opening 11, so that the bolt 3 is threadedly connected with the sleeve 1. By contracting the first opening 11, the sleeve 1 can apply a clamping force to the guide shaft (not shown in the figure) inside it, and finally the guide shaft and the guide shaft support 100 are fixedly connected.

[0027] Figure 4 The flowchart is a processing method for opening the guide shaft support 100 in this embodiment. The processing method mainly includes a guide shaft support preprocessing step S1, a clamping and positioning step S2, a wire cutting processing parameter setting step S3, a wire cutting processing step S4 and a post-processing step S5.

[0028] Specifically, in the guide shaft support preprocessing step S1, a suitable metal material is first selected according to the design requirements of the guide shaft support 100 to make a blank, and then the blank is processed again. In this embodiment, the metal material selected is stainless steel (SUS304). On the one hand, because it has good corrosion resistance, even in some humid or corrosive working environments, the guide shaft support 100 made of stainless steel can effectively prevent rust and corrosion; on the other hand, the alloy elements such as molybdenum and tungsten contained in stainless steel also make it have good high-temperature performance, which can be used for the guide shaft support 100 in high-temperature working environments; in addition, the material uniformity of high-alloy steel is good, and the guide shaft support 100 manufactured by precision machining can have a surface roughness Ra of less than 0.8μm, which can be used in some equipment with extremely high precision requirements to provide high-precision guiding for the guide shaft. In this embodiment, the stainless steel material can be made into a guide shaft support 100 blank with a predetermined shape and size by forging or casting. Then the blank is heat treated, such as annealing, to eliminate the internal stress of the material, improve the cutting performance of the material, and reduce the risk of deformation caused by stress release during wire cutting. Finally, after the blank is formed, the reference surface of the blank needs to be processed again to ensure that its flatness and verticality meet the requirements and provide an accurate reference for subsequent clamping and positioning. The surface roughness Ra of the reference surface should be between 0.8μm and 1.6μm, which can be achieved by grinding or milling.

[0029] In the clamping and positioning step S2, the pre-treated guide shaft support 100 blank is placed on the workbench of the high-precision wire cutting machine and clamped by a customized fixture. The fixture has positioning grooves and positioning protrusions that match the shape of the guide shaft support 100 blank. The blank is firmly fixed by a multi-point clamping method. The positioning grooves and positioning protrusions ensure the precise positioning of the blank on the fixture to prevent displacement and vibration during the processing, and avoid the fixture from damaging the surface of the blank. The positioning accuracy can reach ±0.01mm, that is, the maximum deviation between the actual position of the blank in the fixture and the theoretical position within the allowable range is 0.01mm; a hydraulic clamping device is used to clamp the blank from at least three directions, and the clamping force is maintained in the range of 120N-150N to ensure that the blank does not move or rotate during the processing, and to avoid deformation of the blank due to excessive clamping force. In this embodiment, the clamp is made of hardened steel material. On the one hand, the hardened steel has a high hardness and can resist the wear of the guide shaft support 100 during the clamping process; on the other hand, the hardened steel material has a high yield strength and tensile strength and can withstand a large clamping force to prevent the guide shaft support 100 from being displaced during the processing process.

[0030] Select appropriate wire cutting wire according to the material and thickness of the guide shaft support 100. In the present embodiment, the thickness range of the sleeve 1 of the guide shaft support 100 is 5mm-20mm, which is mainly used for light equipment (such as small automation equipment, instruments and meters). Since the working load of these equipment is small, the strength and rigidity requirements of the guide shaft support 100 are relatively low. For example, in small-scale automated detection equipment, the guide shaft is mainly used to guide the movement of some light-loaded detection probes. At this time, the thickness range of the sleeve 1 of the guide shaft support 100 is 10mm-15mm to meet the requirements. Therefore, in the wire cutting processing parameter setting step S3 of the present embodiment, molybdenum wire and brass wire can be selected for the wire cutting wire. Among them, the melting point of molybdenum wire is high, so that it can maintain good stability in the high-temperature wire cutting discharge machining environment, and the molybdenum wire has a high tensile strength and can withstand a certain tension without breaking easily. For example, in fast wire cutting, the molybdenum wire runs at a relatively high speed (usually 8m / s-12m / s), and its high tensile strength can ensure that it can still work normally under the dual effects of high-speed movement and discharge machining. Brass wire has good electrical conductivity, and can quickly conduct discharge pulses during discharge machining, which is beneficial to improving the machining efficiency of the guide shaft support 100. At the same time, the brass wire has a large density, which makes it have good stability in cutting fluids such as water and is not easily disturbed by liquid flow.

[0031] refer to Figure 1 In order to enable the guide shaft support 100 to clamp the guide shaft more firmly, the end of the sleeve 1 away from the support 2 is provided with a first opening 11 which is symmetrical in the upper and lower directions. Therefore, in this embodiment, the length of the wire cutting wire is ensured to be not less than the outer diameter of the sleeve 1, so that when the wire cutting wire contacts the end surface 14 of the sleeve 1, two upper and lower first openings 11 can be formed at one time.

[0032] In the wire cutting processing step S4, it is necessary to start the wire cutting machine first, energize the wire cutting wire, and heat it to a preset temperature. The numerical control system is used to control the cutting path of the wire cutting wire to penetrate the guide shaft support 100. The specific cutting path is: transfer the wire cutting wire so that it is close to the end face 14 of the sleeve 1 away from the support 2, and the midpoint of the wire cutting wire coincides with the center of the end face 14 and the length direction of the wire cutting wire is perpendicular to the axial direction of the second screw hole 13, so that the wire cutting wire begins to penetrate the sleeve 1 toward the support 2 until the first preset distance is completed, and the first opening 11 is formed at the end of the end face entrance to the first preset distance; then the wire cutting wire is pivoted along the center of the sleeve 1 until it rotates to the first preset angle, and the second opening 12 is formed at the end of the first preset distance to the end of the first preset angle. The above wire cutting wire movement path can be generated by the numerical control system of the wire cutting machine according to the shape and size of the opening. In this embodiment, the first preset distance is not less than half of the axial height of the sleeve 1, and the first preset angle is set to 60°-120°, preferably 90°. By using the above wire cutting technology, the sleeve 1 of the guide shaft support 100 is partially cut into a first opening 11 and a second opening 12, and the second screw hole 13 reserved when the blank of the guide shaft support 100 is made is matched. After the guide shaft passes through the preset position of the guide shaft hole 4 of the guide shaft support 100, the bolt 3 used in conjunction with the guide shaft support 100 is screwed into the second screw hole 13 and passed through the first opening 11, so that the bolt 3 is threadedly connected with the sleeve 1. As the bolt 3 is gradually tightened, the gap of the first opening 11 is gradually reduced, so that the guide shaft is clamped and fixed in the guide shaft hole 4; or when the guide shaft needs to be maintained or replaced due to wear, fatigue, etc., the bolts 3 fixing the upper and lower parts of the sleeve 1 can be unscrewed to restore the first opening 11 to its original state, and the guide shaft can be removed or replaced. The second opening 12 in this embodiment can provide more flexibility for the movement of the guide shaft, and through the coordinated control with the first opening 11, more precise control of the movement of the guide shaft can be achieved. Compared with the opening method of the guide shaft support 100 in the prior art, the wire cutting wire in this embodiment can form the first opening 11 and the second opening 12 at one time after passing through the sleeve 1 according to the preset track of the CNC system, which greatly improves the opening efficiency of the guide shaft support 100, and the processing accuracy of the opening is improved through the wire cutting opening method.

[0033] Furthermore, in the wire cutting processing step S4 of the present embodiment, the numerical control system can also regulate the wire feeding speed of the wire cutting wire of the cutting machine. If the wire feeding speed is too slow, on the one hand, it will significantly reduce the efficiency of the opening processing, and on the other hand, the cooling time of the wire cutting wire after each discharge will be relatively long, which may cause uneven local temperature changes on the surface of the guide shaft support 100, thereby affecting the processing accuracy of the opening or local melting and adhesion of the wire cutting wire and the surface of the guide shaft support 100; and too fast a wire feeding speed will cause the jitter of the wire cutting wire to increase, thereby reducing the processing accuracy and accelerating the wear rate of the wire cutting wire. Preferably, the wire feeding speed is controlled within the range of 6m / s-12m / s.

[0034] During the wire cutting process of the opening of the guide shaft support 100, a large amount of heat will be generated between the wire cutting wire and the guide shaft support 100, so it is necessary to continuously spray the cutting fluid to the contact position between the wire cutting wire and the guide shaft support 100. The cutting fluid can not only effectively absorb and take away the heat, but also prevent the guide shaft support 100 and the wire cutting wire from overheating and affecting the processing accuracy of the opening or causing product damage. At the same time, the good lubrication effect of the cutting fluid can also reduce the friction between the wire cutting wire and the surface of the guide shaft support 100, thereby reducing the scratches and roughness on the surface of the guide shaft support 100, and making the surface of the first opening 11 and the second opening 12 smoother after processing. In addition, since the wire cutting process will generate metal chips, the accumulation of metal chips will interfere with the normal discharge and movement of the wire cutting wire, resulting in broken wire or reduced processing accuracy. Through the flushing effect of the cutting fluid, the above-mentioned metal chips can be washed away to prevent them from accumulating in the processing area, so that the wire cutting wire always maintains a good discharge state and movement trajectory. If the cutting fluid flow rate is too small, the heat cannot be removed in time, which will cause the wire cutting wire temperature to be too high and wire breakage to occur easily; if the cutting fluid flow rate is too large, it may cause liquid turbulence in the processing area, which may cause the wire cutting wire to have a slight displacement during the discharge process, thereby affecting the stability of the discharge, resulting in a decrease in processing accuracy, and the size accuracy and shape accuracy of the opening are difficult to control. Preferably, the cutting fluid flow rate range is controlled at 10-15L / min. In this embodiment, the cutting fluid is an emulsified cutting fluid, which can effectively play a cooling, lubricating and chip removal function during the wire cutting process of the guide shaft support 100 opening.

[0035] In the post-processing step S5, after the opening of the guide shaft support 100 is completed by wire cutting, the machine tool is stopped, and after the wire cutting wire is cooled, it is taken out from the guide shaft support 100, and the processed guide shaft support 100 is cleaned. In this embodiment, the cleaning method adopts ultrasonic cleaning. For the opening of the guide shaft support 100 with complex shapes and parts that may have small gaps, ultrasonic cleaning can penetrate into every corner of the opening. Whether it is metal chips remaining after mechanical processing or impurities such as oil, dust, etc. contaminated during use, they can be effectively removed. Compared with traditional cleaning methods, such as manual wiping or immersion cleaning, ultrasonic cleaning can clean the opening surface more thoroughly and ensure that the cleanliness of the opening surface reaches a higher standard. Since there is no physical contact and friction, ultrasonic cleaning can also maintain the roughness and dimensional accuracy of the opening surface. At the same time, as a cleaning method for batch processing, ultrasonic cleaning can greatly save cleaning time.

[0036] In the processing method of the opening of the guide shaft support 100 of the present embodiment, a wire cutting wire detection step is also included. During the wire cutting processing step S4, the discharge state, processing current and voltage of the wire cutting wire can be monitored in real time. When abnormal discharge is detected or processing parameters exceed the preset range, the wire cutting machine tool can automatically adjust the pulse power supply parameters or suspend processing for troubleshooting.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing an opening of a guide shaft support, wherein the guide shaft support comprises a support, a sleeve and a bolt, wherein the sleeve and the support are both hollow annular rings, wherein the sleeve is fixedly connected to the inner circle of the support, wherein the annular surface of the support has uniformly arranged first screw holes, wherein the sleeve has a first opening perpendicular to the plane direction of the support and a second opening parallel to the plane direction of the support, wherein the sleeve has a plurality of second screw holes parallel to the plane direction of the support and passing through the outer wall of the sleeve and symmetrically distributed along the outer wall, wherein the bolt passes through the second screw hole and is threadedly connected to the sleeve ... The processing method comprises: The guide shaft support preprocessing step includes selecting a metal material to make a blank of the guide shaft support, and then reprocessing the blank; Clamping and positioning step: placing the pre-treated blank on the workbench of the wire cutting machine and clamping it with a customized fixture; Wire cutting processing parameter setting step: selecting a wire cutting wire according to the material and thickness of the guide shaft support, wherein the cutting length of the wire cutting wire is not less than the outer diameter of the sleeve; Wire cutting processing steps: start the wire cutting machine, and after the wire cutting wire is preheated, bring it close to the end face of the sleeve away from the support, so that the midpoint of the wire cutting wire coincides with the center of the end face and the length direction of the wire cutting wire is perpendicular to the axial direction of the second screw hole, and then start to penetrate the sleeve toward the support until it moves a first preset distance, and a first opening is formed at the end point of the end face to the first preset distance; then pivot the wire cutting wire along the center of the sleeve until it rotates a first preset angle, and a second opening is formed at the position from the end point of the first preset distance to the end point of the first preset angle; Post-processing steps: stop the wire cutting machine, remove the wire cutting wire from the guide shaft support, and clean the processed guide shaft support.

2. The method for processing the guide shaft support opening according to claim 1, characterized in that: In the guide shaft support pretreatment step, stainless steel is selected as the blank raw material.

3. The method for machining the guide shaft support opening according to claim 1, characterized in that: In the clamping and positioning step, the clamp is made of hardened steel material.

4. The method for machining the guide shaft support opening according to claim 1, characterized in that: In the wire cutting processing parameter setting step, types of the wire cutting wire include molybdenum wire and brass wire.

5. The method for machining the guide shaft support opening according to claim 1, characterized in that: In the wire cutting processing step, the first preset distance is not less than the outer diameter of the sleeve, and the first preset angle range is 60°-120°.

6. The method for machining the guide shaft support opening according to claim 1, characterized in that: The wire cutting machine is equipped with an automatic wire threading device, and the wire threading speed range of the automatic wire threading device is 6m / s-12m / s.

7. The method for machining the guide shaft support opening according to claim 1, characterized in that: In the wire cutting processing step, the contact position between the guide shaft support and the wire cutting wire is kept eluted with cutting liquid, and the flow rate of the cutting liquid is controlled at 10L / min-15L / min.

8. The method for machining the guide shaft support opening according to claim 1, characterized in that: In the wire cutting processing step, the moving path of the wire cutting wire is controlled by the numerical control system of the wire cutting machine.

9. The method for machining the guide shaft support opening according to claim 1, characterized in that: In the post-processing step, ultrasonic cleaning is used to clean the guide shaft support.

10. The method for machining the guide shaft support opening according to claim 1, characterized in that: The method also includes a wire cutting wire detection step, which performs real-time monitoring on the discharge state, processing current and voltage of the wire cutting wire.

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