A method for processing a multi-tooth probe

Abstract

The invention discloses a method for processing a multi-tooth probe, which comprises the following steps: installing a bar on a spindle, adjusting the spacing between the spindle and the guide sleeve, and adjusting the clearance between the tool mounting surface and the end face of the chuck; firstly trimming the end face with a front deflector, and then turning the outer circle of the blank tooth profile; processing the tooth profile on the blank, using a saw blade or a milling cutter to fine-tune the outer circle of the tooth profile, and using a tooth-trim outer circle cutter to fine-tune the outer circle of the blank, so that the outer circle of the blank tooth profile meets the size requirements; adjusting the tool feed depth, and using the tooth profile processing method of step S3 to fine-tune the tooth profile of the blank, and processing a tooth profile that meets the requirements; processing the outer shape of the blank, and then cutting the blank to obtain a multi-tooth probe. The beneficial effects of the invention are: the processing of the probe is realized through one-time clamping, and the processed probe has high precision, and there are no burrs and flanging between the tooth profiles, thereby ensuring the processing quality.

Description

Technical Field

[0001] The invention relates to the processing of a micro-part probe, in particular to a processing method of a multi-tooth probe. Background Art

[0002] The CK1101II machine tool is a CNC longitudinal cutting automatic lathe developed based on the processing of tiny parts. The machine can perform fully automatic batch cycle processing of continuous loading and unloading of long materials with a diameter of less than 1mm. The machine completes high-precision processing of shaft parts such as turning the outer circle, turning threads, cutting grooves, horizontal drilling, milling squares, milling grooves, radial tapping, lettering, external cylindrical gear hobbing, end face milling, and cutting. In order to ensure high-precision processing of parts below 1mm, the machine tool meets the following requirements: 1 The spindle has high precision, high speed, and low vibration; 2 The motion slide has high positioning accuracy and repeated positioning accuracy, and the reverse clearance of each axis is less than 1um; 3 The machine tool is equipped with a small-diameter oil-type feeder to achieve fully automatic continuous processing of multiple bars.

[0003] The probe parts are made of beryllium copper or SK45 steel. The difficulty in processing lies in the right test tooth, which plays a role in contact testing in chips and printed circuits. The parts require the top of the four teeth to be sharp and no blunt points are allowed. The four teeth are equally divided and the height difference of the four teeth is in um. The diameter of the parts is usually less than 0.3mm, because it is too small to perform secondary processing (secondary processing cannot meet the use requirements due to repeated positioning and other reasons). Even after the parts are formed once, the tooth shape and parts must not have burrs, bends, etc. (due to the material and the size, if subsequent deburring and other means are taken, the tooth shape will be damaged, causing the parts to bend, etc.). Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-tooth probe processing method.

[0005] The object of the present invention is achieved by the following technical solution: a multi-tooth probe processing method, which comprises the following steps:

[0006] S1: Preparation before processing, install the bar on the spindle, and adjust the distance between the spindle and the guide sleeve, as well as the gap between the tool mounting surface and the end face of the chuck.

[0007] S2: External cylindrical machining, use the front deflector to repair the end face first, and then turn the external cylindrical part of the blank tooth shape;

[0008] S3: Tooth shape processing, the tooth shape on the blank is processed by saw blade or milling cutter.

[0009] S4: Fine-tune the outer circle of the tooth profile. Use a tooth trimming cutter to fine-tune the outer circle of the blank so that the outer circle of the blank tooth profile meets the size requirements.

[0010] S5: Fine-tune the tooth profile, adjust the tool feed depth, and use the tooth profile processing method of step S3 to fine-tune the tooth profile of the blank to produce a tooth profile that meets the requirements;

[0011] S6: Cutting, processing the shape of the blank, and then cutting the blank to obtain a multi-tooth probe.

[0012] Optionally, the clearance between the end face of the spindle and the rear end face of the guide sleeve is 10-15 mm.

[0013] Optionally, the gap between each tool mounting surface and the end face of the chuck is 0.1-0.15 mm.

[0014] Optionally, in step S2, a finishing allowance of 0.01 mm is reserved for the outer circle of the rough tooth shape, and the length of the turned outer diameter is 0.01 mm higher than the tooth top.

[0015] Optionally, in step S5, the Z-direction feed depth of the tool is shortened by 0.002 mm.

[0016] Optionally, when using a saw blade for processing, the saw blade quickly approaches the safe position of the bar, locates the X, Y, and Z coordinates, determines the starting point of the tooth shape processing, then the saw blade cuts in a dimension L1 in the Z direction, and processes to the tooth root, then moves downward along the Y axis to process a single tooth shape, then the saw blade retracts a dimension L2 in the Z direction, so that the tip of the blade is separated from the processing surface, and then quickly retracts to the processing starting point of the next tooth shape, the saw blade again cuts in a dimension L1 in the Z direction, and processes to the tooth root, then moves downward along the Y axis to process the second tooth shape, then the saw blade retracts a dimension L2 in the Z direction, so that the tip of the blade is separated from the processing surface, and so on, to process multiple tooth shapes of the multi-tooth probe, and after the tooth shape is processed, the saw blade retracts to the tool changing area.

[0017] Optionally, the cutting-in dimension L1 is 0.06 mm and the cutting-out dimension L2 is 0.02 mm.

[0018] Optionally, when the milling cutter is processing, the milling cutter quickly approaches the safe position of the bar, locates the X, Y, and Z coordinates, determines the processing starting point of the tooth shape, and then the milling cutter rotates at multiple times the spindle speed, cuts into the rough core from the first processing starting point and processes to the tooth root, and then the serrated cutter retreats L3 in the Z direction, and the tool tip is separated from the processing surface. Finally, the milling cutter cuts into the rough core from the second processing starting point and processes to the tooth root, and then the serrated cutter retreats L3 in the Z direction, and the tool tip is separated from the processing surface, and so on, to process multiple tooth shapes of the multi-tooth probe. After the tooth shape is processed, the milling cutter retreats to the tool changing area.

[0019] The present invention has the following advantages: the multi-tooth probe processing method of the present invention realizes the processing of the probe through one-time clamping, and the processed probe has high precision, and there are no burrs and flanging between the teeth, thereby ensuring the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the tool layout of the present invention;

[0021] Figure 2 It is the structural schematic diagram of the front deflection knife;

[0022] Figure 3 It is a schematic diagram of the structure of the external circular cutter for tooth trimming;

[0023] Figure 4 It is the structural schematic diagram of the external circular cutter;

[0024] Figure 5 It is a schematic diagram of the structure of the cutting knife;

[0025] Figure 6 It is a structural schematic diagram of a milling cutter;

[0026] Figure 7 is a schematic diagram of the structure of the workpiece;

[0027] In the figure, 1-front deflector, 2-tooth trimming external cylindrical cutter, 3-external cylindrical cutter, 4-cutting cutter, 5-milling cutter, 6-spindle, 7-guide sleeve. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1 to Figure 7 As shown, a multi-tooth probe processing method comprises the following steps:

[0035] S1: Preparation before processing, install the bar on the spindle 6, and adjust the spacing between the spindle and the guide sleeve, as well as the gap between each tool mounting surface and the end face of the chuck. The smaller the gap between the spindle and the guide sleeve 7, the better. However, considering the actual processing difficulty, preferably, the gap between the end face of the spindle and the rear end face of the guide sleeve is 10-15mm, so that the suspended part of the bar is short, thereby avoiding the bending of the bar and ensuring the coaxiality of the workpiece after processing. The guide sleeve is a prior art. The front end of the bar is covered by the guide sleeve, which can play an auxiliary supporting role for the bar, further avoiding the bending of the bar and ensuring the reliability of the workpiece processing and the coaxiality after processing. The gap between each tool mounting surface and the end face of the chuck is preferably 0.1~0.15mm, so that the span of the bar between the chuck and the tool is small. When the tool is cutting the bar, the bending of the bar can be reduced, thereby ensuring the accuracy of the workpiece after processing;

[0036] S2: External cylindrical machining, use the front deflector 1 to repair the end face first, and then turn the external cylindrical part of the blank tooth shape. The external cylindrical turning here is rough machining. During machining, a 0.01mm finishing allowance is reserved for the external cylindrical part of the blank tooth shape, and the turning outer diameter length is 0.01mm higher than the tooth top;

[0037] S3: Tooth profile processing, the tooth profile on the blank is processed, and the tooth profile is processed by a saw blade or a milling cutter 5. Further, when a saw blade is used for processing, the saw blade quickly approaches the safe position of the bar, locates the X, Y, and Z coordinates, determines the processing starting point of the tooth profile, and then the saw blade cuts in the Z direction with a dimension L1, and processes to the tooth root, and then moves downward along the Y axis to process a single tooth profile, and then the saw blade retracts in the Z direction with a dimension L2, so that the tool tip is separated from the processing surface, and then quickly retreats to the processing starting point of the next tooth profile, and the saw blade cuts in the Z direction with a dimension L1 again, and processes to the tooth root, and then moves downward along the Y axis to process the second tooth profile, and then the saw blade retracts in the Z direction with a dimension L2, so that the tool tip is separated from the processing surface, and so on, to process multiple tooth profiles of the multi-tooth probe. After the tooth profile is processed, the saw blade retreats to the tool changing area. Preferably, the cutting dimension L1 is 0.06 mm, and the retracting dimension L2 is 0.02 mm.

[0038] When the milling cutter 5 is used for processing, the milling cutter 5 quickly approaches the safe position of the bar, locates the X, Y, and Z coordinates, determines the processing starting point of the tooth shape, and then the milling cutter 5 rotates at multiple times the spindle speed, cuts into the rough core from the first processing starting point and processes to the tooth root, and then the serrated cutter retreats L3 in the Z direction, and the tool tip is separated from the processing surface. Finally, the milling cutter 5 cuts into the rough core from the second processing starting point and processes to the tooth root, and then the serrated cutter retreats L3 in the Z direction, and the tool tip is separated from the processing surface, and so on, to process multiple tooth shapes of the multi-tooth probe. After the tooth shape is processed, the milling cutter 5 retreats to the tool changing area.

[0039] S4: fine-trim the outer circle of the tooth profile, using a tooth trimming outer circle cutter 32 to fine-tune the outer circle of the blank so that the outer circle of the tooth profile of the blank meets the size requirements;

[0040] S5: fine-tune the tooth profile and adjust the tool feed depth. Preferably, the Z-direction feed depth of the tool is shortened by 0.002 mm. The tooth profile processing method of step S3 is used to fine-tune the tooth profile of the blank to obtain a tooth profile that meets the requirements.

[0041] S6: Cutting, processing the outer shape of the blank, and then the cutting knife 4 cuts the blank to obtain a multi-tooth probe.

[0042] In the present application, a four-tooth probe process is described in detail.

[0043] In the four-tooth probe, the diameter of the head cylinder of the probe is 0.10mm, and the end face of the head cylinder has four teeth. The diameter of the tail cylinder of the probe is 0.16mm. The head cylinder and the tail cylinder are connected by a conical surface, and the angle between the conical surface and the horizontal plane is 150°. A cone is arranged on the tail end face of the tail cylinder. The cone angle is 60° and the bottom diameter of the cone is 0.08mm.

[0044] Embodiment 1: Processing with saw blade

[0045] In this embodiment, the tooth shape is processed by a saw blade, specifically: S1: Preparation before processing, install the bar on the spindle, and adjust the spacing between the spindle and the guide sleeve, as well as the gap between each tool mounting surface and the end face of the chuck. The smaller the gap between the spindle and the guide sleeve, the better. However, considering the actual processing difficulty, preferably, the gap between the end face of the spindle and the rear end face of the guide sleeve is 10mm, so that the suspended part of the bar is short, thereby avoiding the bending of the bar and ensuring the coaxiality of the workpiece after processing. The guide sleeve is a prior art. The front end of the bar is sleeved by the guide sleeve, which can play an auxiliary supporting role for the bar, further avoiding the bending of the bar, ensuring the reliability of the workpiece processing and the coaxiality after processing, and the gap between each tool mounting surface and the end face of the chuck is preferably 0.1mm, so that the span of the bar between the chuck and the tool is small. When the tool cuts the bar, it can reduce the bending of the bar, thereby ensuring the accuracy of the workpiece after processing;

[0046] S2: External cylindrical machining, use the front deflector 1 to repair the end face first, and then turn the external cylindrical part of the blank tooth shape. The external cylindrical turning here belongs to rough machining. During machining, a 0.01mm finishing allowance is reserved for the external cylindrical part of the blank tooth shape. The length of the turned external diameter is 0.01mm higher than the tooth top, that is, the size of the head cylinder after machining is 0.11mm in diameter and 0.07mm in length.

[0047] S3: Tooth processing, the saw blade quickly approaches the safe position of the bar, locates the X, Y, and Z coordinates, locates the center position of the four teeth of X0, and then the saw blade cuts in 0.06mm in the Z direction and processes to the tooth root, then moves down the Y axis to process a single tooth shape, and then the saw blade retracts 0.02mm in the Z direction, so that the tip of the blade is separated from the processing surface, and then quickly retreats to the processing starting point of the next tooth shape, the spindle indexes 90 degrees, the saw blade cuts in 0.06mm in the Z direction again, and processes to the tooth root, then moves down the Y axis to process the second tooth shape, and then the saw blade retracts 0.02mm in the Z direction, so that the tip of the blade is separated from the processing surface, the saw blade quickly retreats to the safe area, and finally retreats to the X-axis tool change area, and the saw blade stops rotating.

[0048] S4: Fine-tune the outer circle of the tooth profile. After the four teeth are machined, the outer circle of the tooth profile is deformed due to the cutting force, and the tooth profile will inevitably have external curling deformation and burrs. The outer circle of the four teeth needs to be trimmed with a tooth profile trimming cutter 3. After trimming, the outer diameter of the tooth profile is trimmed to the negative limit tolerance size ø0.099 and the length is 0.07mm. In this way, when the outer diameter is 0.1mm in the future, no machining burrs will be generated on the four teeth.

[0049] S5: Fine-tune the tooth profile, repeat step S3, that is, use the saw blade to correct the tooth profile again. At this time, the Z-direction feed depth of the tool is shortened by 0.002mm compared with the feed progress in step S3, from z0.07mm to z0.068mm, so that the burrs on the inner side of the four teeth can be removed;

[0050] S6: Cutting, using the external cylindrical cutter 3 to turn the tail cylinder and process the conical surface, and then cutting the blank to obtain a four-tooth probe.

[0051] Embodiment 2:

[0052] In this embodiment, a milling cutter 5 is used for processing. Compared with the first embodiment, the only difference in the processing of the tooth shape is that the spindle rotates at 1200r / min, and the power tool clamps the single-edged milling cutter 5 at a speed four times that of the spindle. Polygonal processing or gear hobbing function is used to directly mill four teeth at one time. Specifically, the milling cutter 5 quickly approaches the safe position of the bar, locates the X, Y, and Z coordinates, and starts the multi-deformation processing function. The milling cutter 5 rotates at four times the spindle speed, and the milling cutter 5 is positioned at the center of the X0 part. Then, the milling cutter 5 processes to the tooth root at a speed of 0.004mm / r, pauses for 0.02 seconds, and then the milling cutter 5 retreats 0.02mm in the Z direction, the tool tip leaves the processing surface, and the milling cutter 5 quickly retreats to the tool changing area. The polygonal processing is completed, thereby milling four tooth shapes at one time.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. 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 a multi-tooth probe, characterized in that: It includes the following steps, S1: Preparation before processing, install the bar on the spindle, and adjust the distance between the spindle and the guide sleeve, as well as the gap between the tool mounting surface and the end face of the chuck; the gap between the end face of the spindle and the rear end face of the guide sleeve is 10-15mm; the gap between each tool mounting surface and the end face of the chuck is 0.1~0.15mm S2: External cylindrical machining, use the front deflector to repair the end face first, and then turn the external cylindrical part of the blank tooth shape; reserve 0.01mm of finishing allowance for the external cylindrical part of the blank tooth shape, and the turning external diameter length is 0.01mm higher than the tooth top; S3: Tooth profile processing, the tooth profile on the blank is processed, and the tooth profile is processed by a saw blade. When the saw blade is used for processing, the saw blade quickly approaches the safe position of the bar, locates the X, Y, and Z coordinates, determines the processing starting point of the tooth profile, and then the saw blade cuts in the Z direction with a dimension of L1, and processes to the tooth root, and then moves downward along the Y axis to process a single tooth profile, and then the saw blade retracts in the Z direction with a dimension of L2, so that the tool tip is separated from the processing surface, and then quickly retreats to the processing starting point of the next tooth profile, and the saw blade cuts in the Z direction with a dimension of L1 again, and processes to the tooth root, and then moves downward along the Y axis to process the second tooth profile, and then the saw blade retracts in the Z direction with a dimension of L2, so that the tool tip is separated from the processing surface, and so on, to process multiple tooth profiles of the multi-tooth probe. After the tooth profile is processed, the saw blade retreats to the tool changing area, and the cutting dimension L1 is 0.06 mm, and the retracting dimension L2 is 0.02 mm; S4: Fine-tune the outer circle of the tooth profile. Use a tooth trimming external cylindrical cutter to fine-tune the outer circle of the blank so that the outer circle of the blank tooth profile meets the size requirements; S5: Fine-tune the tooth profile, adjust the tool feed depth, shorten the tool feed depth in the Z direction by 0.002 mm, and use the tooth profile processing method of step S3 to fine-tune the tooth profile of the blank to obtain a tooth profile that meets the requirements; S6: Cutting, processing the shape of the blank, and then cutting the blank to obtain a multi-tooth probe.

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