阅读说明：本技术 一种分辨指尖片加工方法 (Processing method for distinguishing finger tip piece ) 是由 刘昌明 刘鹏 李迎春 肖明红 于 2019-11-25 设计创作，主要内容包括：本发明公开了一种分辨指尖片加工方法,本发明分为七个步骤：根据分辨指尖片的预设分辨尺寸和分辨份数对内径和外径进行下料,形成工件；分别在工件的工艺孔、定位孔和穿线孔位置打出工艺孔、定位孔和穿线孔；以工装定位接合面,将多个工件通过接合面装配成一个整圆；以车床的工装定位工件的内孔,以内孔定位精车工件的外圆并研磨；确定工件的中心位置,以慢走丝方式加工指尖槽和错位定位孔；研磨工件表面至预设粗糙度。本发明通过分辨的形式加工一个大型指尖片,在保证指尖片质量的同时,简化了加工方法流程,节省了原材料。(The invention discloses a processing method for distinguishing a fingertip piece, which comprises the following seven steps: blanking the inner diameter and the outer diameter according to the preset resolution size and resolution number of the resolution finger tip piece to form a workpiece; respectively punching a fabrication hole, a positioning hole and a threading hole in the positions of the fabrication hole, the positioning hole and the threading hole of the workpiece; positioning a joint surface by a tool, and assembling a plurality of workpieces into a whole circle through the joint surface; positioning an inner hole of a workpiece by using a tool of a lathe, positioning an outer circle of the finish turning workpiece by using the inner hole, and grinding; determining the central position of a workpiece, and processing a finger tip groove and a staggered positioning hole in a slow wire feeding mode; and grinding the surface of the workpiece to a preset roughness. The invention processes a large finger tip piece in a distinguishing mode, thereby simplifying the processing method flow and saving raw materials while ensuring the quality of the finger tip piece.)

1. A processing method for distinguishing a finger tip sheet is characterized by comprising the following steps:

s1: blanking, namely leveling the raw material in a heat treatment mode, and blanking the distinguishing finger tip sheets according to the preset distinguishing size and the distinguishing number of the distinguishing finger tip sheets to form a group of workpieces;

s2: roughly machining, namely, installing the workpiece into a tooling plate, fixing the tooling plate and the workpiece together through a screw pressing hole by using a screw, milling a reference angle ruler surface on the tooling plate, respectively drilling grooves of the tooling hole at preset positions of the tooling hole of the workpiece by taking a correction reference hole on the tooling plate as a machining center, and drilling a threading hole in the groove of the tooling hole by using a puncher;

s3: the linear cutting processing is carried out, the dimension lines of the inner diameter and the outer circle of the workpiece are determined through the correction reference hole, the workpiece is cut according to the dimension lines, and the joint surfaces of the workpiece are respectively ground; the workpieces are assembled into a plurality of full circles by splicing the joint surfaces, and welding spots are welded at the joint surfaces by laser to fix the joint surfaces and grind the welding spots;

s4: turning, namely fixing a plurality of the whole circles processed in the step S3 in the tool plate, pressing the workpiece by a tool pressing plate through screws, determining an inner hole of the whole circle in the step S3, finely turning an outer circle to a preset size by taking the inner hole as a machining center, deburring, fixing the fabrication hole by a through pin, finely turning the inner hole to a preset size, grinding the inner surface of the inner hole, taking down the through pin, drilling a groove of a positioning hole at the preset position of the positioning hole, and drilling a threading hole at the preset position of the threading hole;

s5: performing linear cutting treatment, namely taking the reference angle ruler surface as a correction direction, obtaining the central dimension of the finger tip groove after correcting the correction reference hole, processing the positioning hole to a preset dimension by taking the correction reference hole as a processing center and the threading hole as a processing starting point in a slow threading manner, extending outwards from the edge of the inner hole, and processing the finger tip groove to the preset dimension;

s6: and (4) performing bench worker treatment, namely removing burrs on the workpiece treated by the S6 by using a bench worker, grinding the surface of the workpiece to a preset roughness, and taking down the tooling plate to obtain the resolution finger tip.

2. The finger tip piece processing method according to claim 1, wherein the heat treatment process comprises:

placing a steel plate on each of the upper and lower surfaces of the raw material, fixing the steel plates by using screws, carrying out vacuum heating at a heating temperature of 720 +/-10 ℃, reducing the heating temperature after keeping the heating temperature for 8 hours, cooling the heating temperature to 650 ℃ at 50 ℃ per hour, keeping the temperature for 8 hours, and stopping heating to naturally reduce the heating temperature to room temperature.

3. The finger tip processing method according to claim 1, wherein the diameter of the threading hole in step S2 is smaller than the predetermined size of the threading hole by 1 mm.

4. The finger tip piece processing method according to claim 1, wherein the processing margin of the inner diameter of the workpiece in step S3 is 2mm, the processing margin of the outer diameter of the workpiece is 2mm, and the processing margin of the fingertip seam-joined surface of the workpiece is 0.02 to 0.04 mm.

5. The finger tip processing method according to claim 1, wherein the welding points are distributed on both sides of the bonding surface bonding portion in step S3.

6. The method of claim 1, wherein: in the step S5, the diameter size of the threading hole is 1mm smaller than that of the preset threading hole.

Technical Field

The invention relates to the field of machining methods, in particular to a method for machining a finger tip piece by distinguishing.

Background

The fingertip seal is widely used for oil-gas lubrication and sealing of aircraft engines, gas turbines and large-scale fans, the fingertip seal is suitable for oil-gas sealing in a high-temperature and high-speed state, and the material of the fingertip sheet generally adopts nickel-based superalloy (GH 4169 and the like) and cobalt-based superalloy (GH 605 and the like). However, for the large finger tip piece, the finger tip piece is large in volume, so that the defect of high processing cost is easily caused in the processing process, and for the large finger tip piece in the prior art, a large-size blank cannot be made by the existing steel rolling technology, and the large-size blank causes large material waste and high cost.

Disclosure of Invention

The invention aims to overcome the problem of high cost in processing large finger tip sheets in the prior art, provides a method for processing a finger tip sheet,

the purpose of the invention is realized by the following steps:

s1: blanking, namely leveling the raw material in a heat treatment mode, and blanking the distinguishing finger tip sheets according to the preset distinguishing size and the distinguishing number of the distinguishing finger tip sheets to form a group of workpieces;

s2: roughly machining, namely, installing the workpiece into a tooling plate, fixing the tooling plate and the workpiece together through a screw pressing hole by using a screw, milling a reference angle ruler surface on the tooling plate, respectively drilling grooves of the tooling hole at preset positions of the tooling hole of the workpiece by taking a correction reference hole on the tooling plate as a machining center, and drilling a threading hole in the groove of the tooling hole by using a puncher;

s3: the linear cutting processing is carried out, the dimension lines of the inner diameter and the outer circle of the workpiece are determined through the correction reference hole, the workpiece is cut according to the dimension lines, and the joint surfaces of the workpiece are respectively ground; the workpieces are assembled into a plurality of full circles by splicing the joint surfaces, and welding spots are welded at the joint surfaces by laser to fix the joint surfaces and grind the welding spots;

s4: turning, namely fixing a plurality of the whole circles processed in the step S3 in the tool plate, pressing the workpiece by a tool pressing plate through screws, determining an inner hole of the whole circle in the step S3, finely turning an outer circle to a preset size by taking the inner hole as a machining center, deburring, fixing the fabrication hole by a through pin, finely turning the inner hole to a preset size, grinding the inner surface of the inner hole, taking down the through pin, drilling a groove of a positioning hole at the preset position of the positioning hole, and drilling a threading hole at the preset position of the threading hole;

s5: performing linear cutting treatment, namely taking the reference angle ruler surface as a correction direction, obtaining the central dimension of the finger tip groove after correcting the correction reference hole, processing the positioning hole to a preset dimension by taking the correction reference hole as a processing center and the threading hole as a processing starting point in a slow threading manner, extending outwards from the edge of the inner hole, and processing the finger tip groove to the preset dimension;

s6: and (4) performing bench worker treatment, namely removing burrs on the workpiece treated by the S6 by using a bench worker, grinding the surface of the workpiece to a preset roughness, and taking down the tooling plate to obtain the resolution finger tip.

Exemplarily, the heat treatment process includes:

placing a steel plate on each of the upper and lower surfaces of the raw material, fixing the steel plates by using screws, carrying out vacuum heating at a heating temperature of 720 +/-10 ℃, reducing the heating temperature after keeping the heating temperature for 8 hours, cooling the heating temperature to 650 ℃ at 50 ℃ per hour, keeping the temperature for 8 hours, and stopping heating to naturally reduce the heating temperature to room temperature.

Exemplarily, the diameter of the threading hole in step S2 is smaller than the preset size of the threading hole by 1 mm.

Illustratively, in step S3, the machining allowance of the inner diameter of the workpiece is 2mm, the machining allowance of the outer diameter of the workpiece is 2mm, and the machining allowance of the fingertip seam-joined surface of the workpiece is 0.02 to 0.04 mm.

Illustratively, the welding points are distributed on two sides of the joint surface joint part in the step S3, and have 3-4 points.

Illustratively, the workpiece is stressed to the maximum extent at the fingertip beam when being pressed in step S4.

Illustratively, the diameter size of the threading hole in the step S5 is smaller than the diameter size of the preset threading hole by 1 mm.

For example, the workpiece in step S6 cannot touch the inner hole with the wire-cut wire during calibration.

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

according to the processing method of the distinguishing fingertip pieces, the large fingertip pieces are distinguished into multiple parts, the parts are processed respectively, and finally the complete fingertip pieces are assembled through the joint faces.

Drawings

FIG. 1 is a flow chart of the present invention.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

The process flow of the invention is shown in figure 1.

(1) The method comprises the following steps: and (5) blanking and processing.

And (4) carrying out material composition, metallographic structure, hardness, thickness size and appearance inspection according to the technical requirements, checking whether the materials have bruises and defects, and returning the materials to a material supplier if the materials have the defects.

Blanking according to the size and the number of the fingertip pieces, and leveling in a heat treatment mode if the raw material is uneven to obtain a round coil material, wherein the specific method comprises the following steps: the raw materials are respectively combined by flat high-temperature resistant steel plates, the raw materials are compressed by screws and sent to a heat treatment factory for vacuum heat treatment, the heat treatment factory carries out vacuum heating on the raw materials and the steel plates at the heating temperature of 720 +/-10 ℃, the heating temperature is reduced after the heating temperature is kept for 8 hours, the temperature is cooled to 650 ℃ at 50 ℃ per hour and kept for 8 hours, and the heating is stopped to naturally reduce the temperature.

And respectively blanking the inner diameter and the outer diameter according to the preset resolution size and the resolution number of the resolution finger tip piece to form a group of workpieces.

(2) Step two: and (5) rough machining.

The method comprises the steps of loading a workpiece into a tool plate, fixing the tool plate and the workpiece together through a screw compression hole by using a screw, milling a reference angle ruler surface on the tool plate, drilling a groove of the process hole at a preset position of the process hole of the workpiece by using an A1 center drill by taking a correction reference hole on the tool plate as a machining center, and drilling a threading hole in the groove of the process hole by using a puncher, wherein the aperture of the threading hole is smaller than the size required by a process diagram by 1 mm.

(3) Step three: and (5) cutting and processing the middle-route position line.

Determining the dimension line of the workpiece by taking the correction reference hole as a standard, cutting the appearance of the resolution finger tip sheet according to the dimension line, wherein the inner diameter is 2mm, the outer diameter is 2mm, the finger tip seam joint surface is 0.02mm-0.04mm, and the cut workpiece is ground by a fitter according to the sequence given by the process diagram and is numbered by a marking pen. And (3) assembling the workpieces into a whole circle by positioning the tooling plate, taking down the tooling plate, welding 3-4 points by using laser on the upper surface and the lower surface of the process designated position of the joint surface for fixing the whole circle workpieces, and grinding the laser welding points by a fitter.

(4) Step four: and (5) turning and processing.

Fixing the rounding workpieces in a tooling plate, pressing the workpieces by a tooling pressing plate through screws, positioning the inner holes of the rounding workpieces by the maximum stress at fingertip beams when the workpieces are pressed, finely turning the outer circles of the workpieces to meet the size requirement, deburring, and inserting through pins into the fabrication holes of the rounding workpieces to fix the rounding workpieces together. The positioning hole is corrected by a machined tool according to the position of the positioning hole on the process diagram, the workpiece is loaded into a tool clamp and is tightly pressed, the designed tool pressing plate must ensure that the pressing force exerted on the pressing plate at the fingertip beam in the inner diameter direction is the maximum, the inner hole is finely turned to the size requirement and is ground, and the inner diameter size is detected and recorded by a three-coordinate measuring machine after turning. Drilling a groove in the position of the positioning hole by using an A1 center drill, and punching a threading hole in the groove by using a puncher, wherein the diameter size of the punched threading hole is smaller than the diameter size of the positioning hole by 1 mm.

(5) Step five: and (5) slowly moving the wire cutting process.

The reference angle ruler surface on the tool plate is used as a correction direction, the correction reference hole on the tool plate is corrected through a plurality of programs, the center size of the finger tip groove is pushed, the error cannot exceed 0.02mm, the inner hole of a workpiece is absolutely not used as a correction center during correction, the correction reference hole is used as a processing center in a slow-walking mode after correction, the threading hole is used as a processing starting point, the positioning hole is processed to a preset size, the positioning hole extends outwards from the edge of the inner hole of the round workpiece, the finger tip groove is processed to a preset size, the pulse current during processing of the slow-walking bit line is small in value, the current cannot be large, the quality can be guaranteed, and the pulse current is optimal at one half to one third of the rated cutting speed of a machine tool.

(6) Step six: and (5) performing bench work treatment.

Removing burrs by a bench worker, grinding a surface with technical requirement of surface roughness, cleaning by ultrasonic cleaning, and taking care not to wear gloves and use cotton yarn during operation. The finger tip piece is not allowed to deform by touch, cleaned and dried. The dimensions were checked with an image projector and the finger tip seams were measured according to the specifications given in the first part. And after the fingertips are processed, cleaned and detected to be qualified, the fingertips are stored and protected against moisture by using a special packaging box and are taken out when being assembled. After the finger tip piece is assembled and assembled, performance detection is carried out on special equipment, and the main indexes are detected by air leakage rate, tempering rate and hysteresis rate.

In summary, according to the processing method for the finger tip piece with the resolution provided by the invention, the finger tip piece is processed in a resolution mode, the finger tip piece can be divided into 3 parts, 4 parts, 5 parts and 6 parts, but not necessarily equal parts, the finger tip piece is distinguished at the position of the finger tip seam according to the size requirement of the design drawing, the finger tip piece is not necessarily equal parts, and the processing method hole is added at a proper position, so that the processing consistency of each finger tip piece component in the processing process is realized. The whole process has high material utilization rate, saves the processing cost and reduces the processing steps compared with the prior art.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.