CN120232699A - A C-ring stress corrosion specimen high-efficiency processing device and method - Google Patents
A C-ring stress corrosion specimen high-efficiency processing device and method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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Abstract
The invention provides a device and a method for efficiently processing a C-ring stress corrosion sample, which relate to the technical field of metal material sample processing and comprise a C-ring fixed connecting shaft, a positioning piece and a pressing piece, wherein the positioning piece and the pressing piece are respectively arranged at two ends of the C-ring fixed connecting shaft, the C ring fixed connection axle includes guiding pin, location ectocone, thread bush, multipurpose polyhedron, axis body, the guiding pin is connected with the location ectocone, the location ectocone is connected with the thread bush, the thread bush is connected with multipurpose polyhedron, multipurpose polyhedron is connected with the axis body, and C ring sample cover is established on C ring fixed connection axle. According to the invention, the clamping and positioning of the C-ring fixed connecting shaft are completed by arranging the positioning piece and the pressing piece, and the C-ring sample with the thickness smaller than 20mm can be quickly fixed on the C-ring fixed connecting shaft by arranging the guide pin, the positioning outer cone, the threaded sleeve, the multipurpose polyhedron and the shaft body, so that the processing quality and efficiency of the C-ring sample are improved.
Description
Technical Field
The invention relates to the technical field of metal material sample processing, in particular to a device and a method for efficiently processing a C-ring stress corrosion sample.
Background
The C-shaped ring is a common constant strain stress corrosion sample, is used for measuring stress corrosion cracking sensitivity of metal materials, is a sample with wide application and economy, is suitable for stress corrosion detection tests of various product forms including weldments, pipes, rods, plates and the like, and is one of important samples for evaluating stress corrosion resistance tests of metals. The processing and testing is generally carried out according to ISO 7539-5:1989, section 5 of corrosion stress Corrosion test of metals and alloys, preparation and use of C-ring samples, and GB/T15970.5-1988, corrosion stress Corrosion test of metals and alloys. The C-ring sample is usually loaded by constant displacement, i.e. the bolts are tightened along the diameter center direction of the ring, and tensile stress is generated on the outer surface of the ring, or the ring body is unfolded and loaded in the opposite direction, so that tensile stress is generated on the inner surface, as shown in fig. 1. According to the shape factor of the sample with specific size, the sample with the type can carry out accurate stress loading in the yield strength, and the C-ring sample is one of the stress corrosion samples with the minimum length, and the sample with the type can be placed in any environment for test due to the small structure and has low cost. In the stress corrosion test of a sheet material, a sample of L-T (the former is the C-ring length direction, and the latter is the crack propagation direction) or T-L direction is generally prepared to determine the crack propagation life of the material in the rolling direction or the transverse direction, however, in practice, the material may have significant anisotropy due to the difference of the material press working methods, and it is necessary to measure the stress corrosion resistance in the S-L or S-T direction (the C-ring length direction is perpendicular to the sheet surface) at the same time to obtain the overall stress corrosion resistance.
According to the standard drawing requirement, the length of the C-shaped ring sample is generally 20mm, and when the axis of the conventional C-shaped ring sample extends in the L direction or the T direction of the plate, a certain margin exists in the length direction of a general blank, so that the clamping during processing is facilitated. The machining is mainly performed by using equipment such as linear cutting, sawing machines, numerical control lathes, numerical control machining centers and the like. The rough procedures of the method can be divided into blanking, turning an outer cylindrical surface, turning an inner cylindrical surface, milling a gap, drilling a hole and the like, and the process is mature, and as the clamping end is arranged in the length direction of the blank, the one-step processing and forming of the effective part of the sample can be ensured, and the surface roughness and the dimensional tolerance of the whole ring are better ensured. In the case of the C-ring specimen of S-L or S-T (axial line extending in the thickness direction), when the thickness of the sheet is larger than 20mm, the specimen length is generally 20mm. When the thickness of the plate is smaller than 20mm, the plate can be used as the length of a sample only according to the thickness of the original plate, at this time, a conventional processing means is adopted, the position which can be clamped in the length direction is not available, if the U-turn is divided into two times of clamping, the mark with the knife connection can be caused, because the main stress direction of the C-shaped ring is perpendicular to the surface with the minimum stress corrosion cracking resistance, the roughness is unqualified or the stress of the stress surface of the ring is uneven due to the fact that the mark with the knife connection is easy, cracks can be generated at a position other than the center position of the ring, and the test result is greatly influenced.
The publication number CN117600863A discloses a device for processing a C-shaped ring sample and a processing method thereof, the device comprises a base, a clamping plate and a positioning block, wherein the positioning block is arranged at the top of the base, the clamping plate is connected or separated from the base through the positioning block, the base is connected or separated from a numerical control machine tool, a containing groove is formed between the clamping plate and the base, the C-shaped ring sample is arranged in the containing groove, the top of the C-shaped ring sample is connected with the bottom of the clamping plate, and the bottom and/or the outer side wall of the C-shaped ring sample are connected with the base. The device in this prior art cannot process the outer circle of the C-ring, and the device can only process the C-ring with a thickness of more than 20 mm.
Disclosure of Invention
In view of the above, the invention aims to provide a device and a method for efficiently processing a C-ring stress corrosion sample. The device solves the problems that the device in the prior art can not process the excircle of the C ring and can only process the C ring with the thickness of more than 20 mm.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
The utility model provides a high-efficient processingequipment of C ring stress corrosion test sample, includes C ring fixed connection axle, setting element, compresses tightly the piece, setting element, compress tightly the both ends of piece at C ring fixed connection axle respectively, C ring fixed connection axle includes guide pin, location ectocone, thread bush, multipurpose polyhedron, axis body, the guide pin is connected with the location ectocone, the location ectocone is connected with the thread bush, the thread bush is connected with multipurpose polyhedron, multipurpose polyhedron is connected with the axis body, and C ring test sample cover is established on C ring fixed connection axle.
The clamping and the positioning of the C-ring fixed connecting shaft are finished through the positioning piece and the pressing piece, and the guide pin, the positioning outer cone, the threaded sleeve, the multipurpose polyhedron and the shaft body are arranged, so that the C-ring sample with the thickness smaller than 20mm can be quickly fixed on the C-ring fixed connecting shaft, and the processing quality and the processing efficiency of the C-ring sample are improved.
Further, the guide pin, the positioning outer cone, the thread sleeve, the multipurpose polyhedron and the shaft body are of an integrated structure.
This setting improves the connection fastness of setting element and C ring fixed connection axle to and the location efficiency of C ring fixed connection axle, improves the quality and the efficiency of C ring sample processing.
Further, the locating piece comprises a locating spline shaft and an adapter sleeve, wherein the locating spline shaft is matched with the guide pin and the locating outer cone, and the adapter sleeve is matched with the thread sleeve.
The positioning spline shaft in the arrangement is used for realizing the coaxial positioning of the positioning piece and the C-ring fixed connecting shaft, and can also realize the co-rotation of the positioning piece and the C-ring fixed connecting shaft.
Further, the shaft body is provided with a first clearance groove and a second clearance groove, the diameter of the first clearance groove is larger than that of the second clearance groove, the first clearance groove is close to the threaded sleeve, and the second clearance groove extends to one end far away from the threaded sleeve and extends to the end of the shaft body.
The first clearance groove in this setting can avoid can not process axis body itself when processing C ring outer cylinder, improves processingquality and efficiency, and the second clearance groove is favorable to processing C ring breach.
Further, a notch indication position is arranged on the shaft body, and the notch indication position is located between the multipurpose polyhedron and the first empty avoidance groove.
The notch indication position in the arrangement is used for positioning during processing of the C ring notch, and processing quality and efficiency are improved.
Further, the positioning spline shaft comprises a cylindrical shaft body, a positioning inner cone and a first transmission spline, wherein the cylindrical shaft body is connected with the positioning inner cone, the positioning inner cone is connected with the first transmission spline, the cylindrical shaft body is matched with the guide pin, the positioning outer cone is matched with the positioning inner cone, and the first transmission spline is matched with the adapter sleeve.
This setting guarantees location integral key shaft connection stability, improves processingquality and efficiency, also guarantees the axiality of setting element and C ring fixed connection axle simultaneously.
Further, a second transmission spline and a first internal thread are arranged in the adapter sleeve, the second transmission spline is matched with the first transmission spline, and the first internal thread is connected with the external thread of the thread sleeve.
This setting improves the connection stability of adapter sleeve to and the axiality with location integral key shaft, and then improves the axiality of C ring fixed connection axle, improves the quality and the efficiency of C ring sample processing.
Further, the compressing piece comprises a notch reducing sleeve, a hexagonal reducing sleeve, a compressing nut and a positioning anti-slip nut, and the notch reducing sleeve, the hexagonal reducing sleeve, the compressing nut and the positioning anti-slip nut are sequentially sleeved on the C-ring fixed connecting shaft.
The notch reducing sleeve in the setting is used for fixing the C-ring sample, and the compression nut is used for fixing the C-ring, the notch reducing sleeve and the hexagonal reducing sleeve on the C-ring fixed connecting shaft, so that the firmness of the C-ring sample is improved, and the quality and the efficiency of the C-ring sample are improved.
Further, the hexagonal reducer sleeve comprises a positioning boss, and the positioning boss is embedded into the second clearance groove.
The arrangement is convenient for clamping the flat tongs, and the hexagonal reducer sleeve corresponds to the multipurpose hexagonal body, so that the clamping positions of the hexagonal reducer sleeve and the multipurpose hexagonal body are kept consistent.
The high-efficiency processing method for the C-shaped ring stress corrosion sample adopts the processing device and is characterized by comprising the following steps of:
s1, acquiring a C-ring sample, wherein the C-ring sample is of a cylinder structure and consists of a preset outer cylindrical surface and an inner cylindrical surface;
s2, fixing the positioning piece;
S3, assembling the C ring fixed connecting shaft and the compression piece, simultaneously installing a C ring sample, marking a notch position, and processing the outer cylindrical surface of the C ring;
s4, machining the C ring notch.
The method in the setting only needs to transfer the sample and the device to other numerical control equipment integrally, the clamping end of the device can be automatically positioned, the device can be conveniently clamped on the flat tongs of the machine tool, the automatic positioning is realized through the deflection of a fixed angle after the device is turned over, the sample can be directly processed without searching the center reference of the sample again, the processing quality of the sample can be effectively ensured, and the high-quality and high-efficiency processing of the C-shaped ring sample is realized.
Compared with the prior art, the device and the method for efficiently processing the C-shaped ring stress corrosion sample have the following advantages:
1) According to the invention, the outer cylindrical surface of the C ring is formed by one-step processing through the cooperation of the positioning piece, the C ring fixed connecting shaft and the pressing piece;
2) According to the invention, through the cooperation of the multipurpose polyhedron and the hexagonal reducer sleeve, the simultaneous clamping processing of a plurality of C-ring samples can be realized, and then through the cooperation of the notch reducer sleeve, the compression nut and the positioning anti-slip nut, the fixation of the plurality of C-ring samples can be realized, and the processing difficulty and the processing efficiency of the C-ring samples are improved;
3) The multipurpose polyhedron is a multipurpose polyhedron, can position the C ring sample when processing a 60-degree notch, and improves the processing difficulty and the processing efficiency of the C ring sample notch;
4) The invention is convenient for cutting the tool of the machining center by arranging the first clearance groove and the notch of the hexagonal reducer sleeve;
5) The processing device is convenient to position, can reduce or avoid searching a reference, is convenient and fast in clamping mode, can protect a sample from being damaged, has good reliability and usability, can provide efficient and stable processing for the sample, realizes quick clamping and positioning of a C-shaped ring and high-quality processing, improves quality and efficiency, and provides an important processing means for developing a metal stress corrosion test.
Drawings
FIG. 1 is a schematic diagram of a conventional C-ring with different loading modes;
FIG. 2 is a C-ring structure diagram of the present invention;
FIG. 3 is a partial block diagram of a high-efficiency processing device for C-ring stress corrosion samples according to the invention;
FIG. 4 is an exploded view of a high efficiency processing apparatus for C-ring stress corrosion specimens in accordance with the present invention;
FIG. 5 is a schematic view of the positioning spline shaft of the present invention;
FIG. 6 is a schematic diagram of an adapter sleeve according to the present invention;
FIG. 7 is a schematic structural view of a C-ring fixed connection shaft according to the present invention;
FIG. 8 is a schematic view of the hexagonal sleeve of the present invention;
FIG. 9 is a schematic view of the structure of the notch reducer sleeve of the present invention;
FIG. 10 is a schematic view of the structure of the support of the present invention;
FIG. 11 is a schematic view of the construction of the positioning slip nut of the present invention;
FIG. 12 is a graph comparing the time spent processing 50 pieces using the method of the present invention and the conventional method;
FIG. 13 is a graph comparing the yield of 50 parts processed by the method of the invention and the conventional method;
FIG. 14 is a first view of the example 13mm sheet C ring;
FIG. 15 is a second view of the example 13mm sheet C ring.
Reference numerals illustrate:
100-C ring, 101-outer cylindrical surface, 102-inner cylindrical surface, 103-pin hole, 104-C ring notch, 200-C ring of unprocessed pin hole, 1-C ring fixed connection shaft, 11-guide pin, 12-positioning outer cone, 13-thread bushing, 14-multipurpose polyhedron, 15-shaft body, 151-first clearance groove, 152-second clearance groove, 153-notch indicating position, 154-first external thread, 155-central hole, 156-first section, 157-second section, 2-positioning piece, 21-positioning spline shaft, 211-cylindrical shaft body, 212-positioning inner cone, 213-first transmission spline, 22-adapter bushing, 221-second transmission spline, 222-first internal thread, 3-pressing piece, 31-notch diameter bushing, 311-notch, 312-first cylindrical bushing, 32-hexagonal diameter bushing, 321-positioning boss, 322-second cylindrical bushing, 323-hexagonal clamping end, 33-pressing nut, 34-positioning anti-slip nut, 4-342-second support ring, 4-support ring, 42-support ring, and 4-support ring.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The design idea of the invention is that the lengths of the C-ring samples in the S-L and S-T directions are along the thickness direction of the plate, namely the total length of the samples is equal to the thickness of the plate, and the blank is cut into a cylinder by wire cutting in general, and the diameter of the cylinder is slightly larger than the outer diameter of the C-ring (a certain machining allowance is reserved). The conventional processing method generally adopts processes of drilling, boring, milling, hinging and the like to process the cylindrical surface in the C ring to the size required by the drawing, and the conventional processing process and method can ensure the dimensional accuracy and roughness of the inner cylindrical surface. The outer cylindrical surface is generally clamped by adopting a three-jaw chuck of a numerical control lathe, and because the blank has no redundant clamping allowance in the length direction, machining cannot be completed at one time, turning and clamping are required, only one workpiece can be machined each time, meanwhile turning machining is easy to produce cutter connecting marks, and the machining quality of the outer cylindrical surface of the C ring is affected. After the whole ring (the inner cylindrical surface and the outer cylindrical surface are machined), the whole ring is transferred to a numerical control machining center for 60-degree notch machining, so that the whole ring is required to be clamped, reference found, positioned and the like again, and a large amount of labor and time are consumed. If the problems can be solved, the problems of difficult processing and low efficiency of the C-ring sample can be solved.
Based on the above problems, the invention provides a high-efficiency processing device for a C-ring stress corrosion sample, as shown in fig. 1-15, wherein a processed C-ring 100 comprises an outer cylindrical surface 101, an inner cylindrical surface 102, a pin hole 103 and a C-ring notch 104, the thickness of the C-ring is below 20mm, the processing device comprises a C-ring fixed connecting shaft 1, a positioning piece 2, a pressing piece 3, a supporting piece 4 and a processing center end mill 5, the positioning piece 2 and the pressing piece 3 are arranged at two ends of the C-ring fixed connecting shaft 1, the C-ring sample is sleeved on the C-ring fixed connecting shaft, the C-ring sample is in a cylindrical structure and consists of a preset outer cylindrical surface and an inner cylindrical surface, the C-ring sample is processed to obtain the C-ring, the supporting piece 4 is used for supporting the C-ring fixed connecting shaft so as to reduce vibration in the process of processing the C-ring notch and ensure the processing quality, and the processing center end mill 5 is used for processing the C-ring notch 104. The thickness referred to in the present invention is L as shown in fig. 2.
Specifically, the C-ring fixed connection shaft 1 at least comprises a guide pin 11, a positioning outer cone 12, a thread bush 13, a multi-purpose multi-square body 14 and a shaft body 15, wherein the guide pin 11 is connected with the positioning outer cone 12, the positioning outer cone 12 is connected with the thread bush 13, the thread bush 13 is connected with the multi-purpose multi-square body 14, the multi-purpose multi-square body 14 is connected with the shaft body 15, and the C-ring sample is installed on the shaft body 15 during processing. Through setting up guide pin, location ectocone, thread bush, multipurpose polyhedron, axis body, can enough make things convenient for the clamping of C ring sample, processing thickness is less than 20 mm's C ring sample, and the location is accurate moreover, and clamping is efficient, and C ring quality is higher after the processing.
The multi-purpose polyhedron is determined according to a notch of a processed C ring sample, the notch of the C ring sample is 60 degrees, the selected multi-purpose polyhedron is a multi-purpose hexagon, the multi-purpose hexagon mainly has three functions, namely, the opposite surfaces of the hexagon are parallel, clamping of a numerical control machining center flat tongs can be used, the hexagon deflects by +/-60 degrees along an axis, the orientation of the hexagon can be kept unchanged, and therefore milling of the notch of 60 degrees of the C ring sample can be completed without tool setting (the notch of 60 degrees is milled twice, the connecting axis deflects by +/-60 degrees each time, half of the notch is milled), and the hexagon is convenient to disassemble and assemble by using a spanner between the C ring fixed connecting axis and an adapter sleeve.
More specifically, the guide pin 11, the positioning outer cone 12, the thread bush 13, the multipurpose multipart body 14 and the shaft body 15 are integrated.
Specifically, support piece 4 includes pedestal 41, C ring support arc surface 42, and C ring support arc surface and C ring sample contact, can play the effect of support on the one hand, avoid producing the vibration during processing, can carry out the location of machining center Z axle direction on the other hand, can realize batch processing, need not to process at every turn and look for the cutter height benchmark.
Preferably, the guide pin 11 is a cylindrical guide pin.
Specifically, the diameter of the shaft body 15 is equal to that of the inner cylindrical surface 102 of the workpiece or the C-ring, so that the C-ring of the processed inner cylindrical surface can be sleeved on the shaft body.
Specifically, the shaft body 15 is provided with a first hollow avoiding groove 151 and a second hollow avoiding groove 152, preferably, the first hollow avoiding groove is communicated with the second hollow avoiding groove, the first hollow avoiding groove is close to the threaded sleeve, and the second hollow avoiding groove extends to one end far away from the threaded sleeve and extends to the end of the shaft body. The second clearance groove is a cutter clearance groove used for machining the notch body of the C ring, and the diameter (forming a step with the shaft body) of the second clearance groove is larger than the diameter of the inner cylindrical surface of the C ring and smaller than the diameter of the outer cylindrical surface, so that the numerical control lathe cannot machine the shaft body when machining the outer cylindrical surface.
Specifically, the shaft body 15 is provided with a notch indicating position 153, the notch indicating position 153 is a narrower notch milled by an end mill, the notch indicating position 153 is located between the multipurpose hexagonal body and the first clearance groove, the notch indicating position is mainly used for positioning the notch position of the C ring, the 60-degree notch direction is generally divided into an L direction or a T direction, and a mark is made when a blank is processed.
Specifically, one end of the shaft body 15 far away from the thread sleeve is provided with a first external thread 154 and a central hole 155 for fixing a sample by a nut and fixing a connecting shaft by a C ring of a lathe center.
Specifically, the shaft body 15 includes a first section 156 and a second section 157 that are connected to each other, the diameter of the first section is larger than that of the second section, the multipurpose hexagonal body is sleeved on the first section, the notch indication position 153 and the first clearance groove are disposed on the first section, and the second clearance groove is disposed on the second section.
Specifically, the positioning piece 2 comprises a positioning spline shaft 21 and an adapter sleeve 22, wherein the positioning spline shaft 21 is matched with the guide pin 11 and the positioning outer cone 12, and the adapter sleeve 22 is matched with the threaded sleeve 13. The guide pin and the positioning outer cone in the arrangement are convenient to connect with the positioning spline shaft and ensure coaxiality, and the threads of the threaded sleeve are mainly used for connecting with the adapter sleeve.
Specifically, the positioning spline shaft 21 comprises a cylindrical shaft body 211, a positioning inner cone 212 and a first transmission spline 213, wherein the cylindrical shaft body 211 is connected with the positioning inner cone 212, the positioning inner cone 212 is connected with the first transmission spline 213, the cylindrical shaft body is matched with a guide pin, the positioning outer cone is matched with the positioning inner cone, and the first transmission spline is matched with an adapter sleeve. The cylindrical shaft body is used for clamping a three-jaw or four-jaw chuck of a numerical control lathe, the diameter of the other end of the cylindrical shaft body is slightly larger and is used for being tightly attached to the chuck to perform axial positioning, the inner conical surface of the cylindrical shaft body is used for being matched with the outer conical surface of one end of a C-ring fixed connecting shaft to achieve coaxial positioning, and a spline on the cylindrical shaft body is used for being matched with a spline on an adapter sleeve and drives the spline to rotate together with the connecting shaft through rotation of the chuck.
Specifically, a second transmission spline 221 and a first internal thread 222 are disposed in the adapter sleeve 22, the second transmission spline 221 is matched with the first transmission spline 213, and the first internal thread 222 is connected with an external thread of the thread sleeve. The length of the first internal thread in the arrangement is smaller than that of the adapter sleeve, so that the adapter sleeve can play a role in axial fixation when being connected with the C-ring fixed connecting shaft.
Specifically, the compressing member 3 includes a notch reducing sleeve 31, a hexagonal reducing sleeve 32, a compressing nut 33, and a positioning anti-slip nut 34, where the notch reducing sleeve 31, the hexagonal reducing sleeve 32, the compressing nut 33, and the positioning anti-slip nut 34 are all sleeved on the C-ring fixed connecting shaft in sequence, and specifically, the notch reducing sleeve 31, the hexagonal reducing sleeve 32, the compressing nut 33, and the positioning anti-slip nut 34 are all sleeved on the second section in sequence.
Specifically, the inner diameter of the notch reducing sleeve 31 is consistent with the diameter of the C-ring fixed connecting shaft, and the outer diameter is smaller than the outer cylindrical surface diameter of the C-ring sample, and the main purpose is to fix the C-ring sample on the C-ring fixed connecting shaft by extruding a nut and the reducing sleeve;
Specifically, the notch reducing bush 31 includes a notch 311 and a first cylindrical bush 312, where the first cylindrical bush is sleeved on the second section of the shaft body and extends to a point of the first external thread 154, where the first cylindrical bush is used to contact with the fastening nut to fix the C-ring sample, and the notch is mainly used to process the C-ring 60-degree notch, where the milling cutter is avoided.
Specifically, the hexagonal reducer 32 includes a positioning boss 321, a second cylindrical sleeve 322, and a hexagonal clamping end 323, where the positioning boss is embedded in the second clearance groove, so that the orientation of the hexagonal clamping end is consistent with that of the multipurpose hexagonal body on the C-ring fixed connection shaft, and the dimensions of the hexagonal are also consistent, so that when 60-degree notch processing is performed on the machining center, the hexagonal reducer can be clamped by using flat tongs.
Specifically, the compression nut 33 is used for fixing the C-ring, the notch reducer sleeve and the hexagonal reducer sleeve on the C-ring fixed connecting shaft.
Specifically, the positioning anti-slip nut 34 is used for axial positioning on a flat tongs of a machining center, so that the positions of samples in each batch are the same, and tool setting and reference finding operations are not required in each batch. Preferably, the outer diameter of the anti-slip nut is larger than the diameter of an inscribed circle of a hexagonal body clamped by the flat tongs, so that the surface of the anti-slip nut can be tightly attached to the side surface of the vice for positioning.
Specifically, the positioning anti-slip nut 34 is provided with an anti-slip embossing 341 on the outside, and a second internal thread 342 is provided on the inside of the positioning anti-slip nut, and the second internal thread 342 is in threaded connection with the first external thread 154.
The device of the invention has the following advantages;
The device can take an inner cylindrical surface which is easy to process as a reference, can realize one-step processing and forming of the outer cylindrical surface, can realize simultaneous clamping and processing of a plurality of C-ring samples, can realize 60-degree notch processing of the C-ring samples, is convenient to position, can reduce or eliminate searching for the reference, is convenient for cutting of a machining center cutter, is convenient to clamp and can protect the samples from being damaged, and is good in reliability and usability.
The invention also provides a high-efficiency processing method of the C-ring stress corrosion sample, which adopts the processing device and comprises the following steps:
s1, acquiring a C-ring sample, wherein the C-ring sample is of a cylinder structure and consists of a preset outer cylindrical surface and an inner cylindrical surface;
Specifically, firstly, cutting a blank into a cylinder by utilizing wire cutting, wherein the outer diameter of a preset outer cylindrical surface of the cylinder is slightly larger than the outer diameter of the C ring (a certain machining allowance is reserved for 1-3 mm). And then the inner cylindrical surface is machined by utilizing a numerical control lathe, and the size precision and the roughness of the hole can be ensured by adopting technologies such as drilling, boring, hinging and the like, so that the inner hole is machined to the required size of the drawing of the C ring.
S2, fixing the positioning piece;
Specifically, a cylindrical shaft body of the positioning spline shaft is fixed through a three-jaw or four-jaw chuck of a numerical control lathe, and alignment is performed.
S3, assembling the C ring fixed connecting shaft and the compression piece, simultaneously installing a C ring sample, marking a notch position, and processing an outer cylindrical surface;
And sleeving a C-ring sample with the processed inner cylindrical surface on a shaft body of a C-ring fixed connecting shaft, aligning a 60-degree gap position marked in advance with a gap indication position on the shaft body, sleeving a gap reducer sleeve and a hexagonal reducer sleeve respectively, and compacting by using a compression nut. And the C ring fixed connecting shaft with the C ring sample fixed is connected with the adapter sleeve through threads. And then, attaching the connecting shaft with the adapter sleeve to the inner conical surface of the spline shaft through the outer conical surface, and tightly propping the central hole at the end part of the connecting shaft by using the tip of the rear tailstock of the numerically controlled lathe, so that the clamping on the numerically controlled lathe can be completed.
S4, the clamping is completed, the integrally formed batch processing of the outer cylindrical surface can be carried out, the outer cylindrical surface is processed by adopting the prior art, and the next 60-degree notch processing can be carried out after the outer cylindrical surface processing is completed. S4 specifically comprises the following steps:
s41, loosening the tail seat center of the numerical control lathe, taking down the adapter sleeve connected to the C-shaped fixed connecting shaft, and screwing a positioning anti-slip nut on the other end of the C-shaped fixed connecting shaft;
S42, integrally placing the C-shaped fixed connecting shaft on a flat tongs of a numerical control machining center, supporting the lower part by a supporting base, enabling the end face of an anti-slip positioning nut to be tightly attached to the side face of the flat tongs, and enabling the flat tongs to clamp the connecting shaft and a hexagonal plane on a hexagonal reducer sleeve, so that 60-degree notch machining can be started. Because the axis of the three-axis machining center cutter is always perpendicular to the workbench, after the notch is machined by one half, the C-ring fixed connecting shaft is integrally rotated for 60 degrees, and then the other half of the notch is machined, if the three-axis machining center is arranged on the four-axis machining center, the four-axis machining center does not need to be turned over, and the whole 60-degree notch can be machined through the rotation of the fourth axis of the machine tool.
Through the steps, all machining of the inner cylindrical surface, the outer cylindrical surface and the 60-degree notch is completed, and the C ring 200 of the unprocessed pin holes is obtained, and as shown in fig. 4, the C rings of a plurality of unprocessed pin holes are overlapped, and the pin holes can be conveniently positioned through the machined 60-degree notch due to simpler machining process, so that machining can be carried out according to a conventional machining mode.
According to the method, the sample and the device are only required to be integrally transferred to other numerical control equipment, the clamping end of the device can be automatically positioned, the device can be conveniently clamped on the flat tongs of the machine tool, automatic positioning is realized through fixed angle deflection after overturning, the sample can be directly processed without searching for a center reference of the sample again, the processing quality of the sample can be effectively ensured, and the high-quality and high-efficiency processing of the C-shaped ring sample is realized.
According to the high-efficiency processing device and method for the C-ring stress corrosion sample designed by the invention, a processing staff A is a person with fifteen years of sample processing experience and has a technician professional qualification certificate, an aluminum alloy plate with the thickness of 13mm is selected as a blank, 50C-ring samples are processed by using a conventional method in order to be compared with the prior processing method, and for the C-ring processed by a material with the thickness of less than 20mm of the blank plate, as the length dimension of the C-ring is equal to the thickness dimension of the blank, a clamping position capable of completing one-time clamping forming processing is not available during processing, the conventional method is that a preset outer cylindrical surface of the C-ring sample is required to be divided into two sections to be processed, a chuck of a lathe is firstly used for clamping the preset outer cylindrical surface with the length of about one third of the C-ring sample (the preset outer cylindrical surface is pre-cut into a cylinder with a certain allowance in advance), and the other end of the C-ring sample is turned after turning is finished. The two ends are turned, and the middle knife receiving part needs to be polished and smooth by fine sand paper. Therefore, only one piece can be processed each time, the processing efficiency is low, the cutter can not be turned once each time, the quality is unstable, and the clamping and positioning are required to be carried out again when the notch is processed, so that the process is complicated. The specifications of the specific samples are shown in fig. 14-15, and the following related data are counted.
Table 1 statistics of samples prior to testing
| Method of | Number of pieces | Material of material | Sample morphology before processing | Specification (mm) | Whether or not to pass |
| The invention is that | 50 | Aluminum alloy | The inner cylinder being machined | 20-17-13 | Is that |
| Conventional method | 50 | Aluminum alloy | The inner cylinder being machined | 20-17-13 | Is that |
TABLE 2 results of the test of the invention (time: minutes)
| Batch of | Number of processed pieces | Processing staff | Clamping time | Adjusting the time | Processing time | When in total use | When a single piece is used | Yield of percent of pass |
| 1 | 50 | A | 40 | 10 | 120 | 170 | 3.4 | 100% |
TABLE 3 test results of conventional methods (time: minutes)
| Batch of | Number of processed pieces | Processing staff | Clamping time | Adjusting the time | Processing time | When in total use | When a single piece is used | Yield of percent of pass |
| 1 | 50 | A | 240 | 120 | 250 | 610 | 12.2 | 70% |
As can be seen from tables 1-3, fig. 12 and fig. 13, the invention saves a great deal of clamping time and adjustment time, and the processing quality of the sample is obviously improved. The device and the method for efficiently processing the C-ring stress corrosion sample provide a set of efficient solution for processing the sample.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (10)
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