CN112756915B - Method for processing grooved contact product - Google Patents
Method for processing grooved contact product Download PDFInfo
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- CN112756915B CN112756915B CN202011612903.7A CN202011612903A CN112756915B CN 112756915 B CN112756915 B CN 112756915B CN 202011612903 A CN202011612903 A CN 202011612903A CN 112756915 B CN112756915 B CN 112756915B
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a processing method of a grooved contact product. The processing method comprises the following steps: (1) clamping a blank of a contact product in a self-centering manner, roughly machining a groove by a water cutting process, and reserving a finish machining allowance of 0.15-0.2mm on one side to obtain an intermediate product A; wherein: in the water cutting process, the feed multiplying power is less than or equal to 70 percent, and the cutting abrasive is less than or equal to 80 meshes; (2) and (3) positioning the intermediate product A in the step (1) to a machine tool chuck through the cooperation of CCD visual identification positioning and an industrial robot, and performing a turning and milling combined machining process. The method ensures that a product is stably clamped and positioned to a chuck of a machine tool through the cooperation of CCD visual identification and positioning and an industrial robot, and realizes the finish machining of a product groove and the finish machining of other rotary characteristics; the machining efficiency of the product can be integrally improved on the premise of meeting the product quality, and the machining efficiency of the grooved contact product has good efficiency advantages for batch machining production of grooved contact products.
Description
Technical Field
The invention relates to a processing method of a grooved contact product.
Background
The CuCr contact material has excellent heat conducting performance and excellent welding resistance, so that the CuCr contact material is widely applied to electric power system appliances such as a vacuum circuit breaker and the like. The CuCr contact product belongs to the most key and most core component in a vacuum arc-extinguishing chamber structure, is equivalent to the heart of the vacuum arc-extinguishing chamber structure, and has huge market demand. At present, almost most CuCr contact products are in a groove type, including a straight groove type, a swastika type, a spiral type and other special-shaped groove types.
The contact material is produced by a non-powder metallurgy process, the early processing method is saw blade milling cutter processing (the powder metallurgy process can apply a near-net forming process, a groove does not need to be machined, the non-powder metallurgy process refers to a vacuum casting process, a vacuum infiltration process, an electric arc melting process and the like), but the non-powder metallurgy process is limited to straight groove type processing, cannot expand processing requirements such as groove edge chamfering and the like, and is eliminated. The machining method generally adopted at present is turning and milling combined machining, and has the advantages that turning and milling combined machining is realized through one-time clamping, the requirement on the equal division of the contact slotting, the position of the slotting relative to a rotation center and the like are met, and the slotting is milled by using an end mill. However, the main problem of this method is that the efficiency of the milling process is not high. For the grooved CuCr contact part, the processing time of milling the groove by using an end mill generally accounts for at least 70% of the total processing time of the product.
Therefore, the main efficiency bottleneck in the machining of the grooved CuCr contact part is the groove milling machining. The efficiency is not high for the following reasons: firstly, the grooved product has poor manufacturability of the structure, cannot clamp the product by adopting large clamping force, and has deformation risk in the radial direction or the thickness direction; and secondly, the limitation of the power tool which can be configured by the composite milling function comprises the limitation of the number of the power tool distribution, the limitation of inherent characteristics such as the rotating speed, the torque, the rigidity and the like of the power tool, so that the rough milling and the finish milling cannot be decomposed step by step when a groove is milled, larger tool consumption and feeding speed cannot be adopted, the management of the service life of the tool is not favorably controlled, and the processing quality of a product is not favorably controlled.
Therefore, the existing processing method for obtaining the grooved contact product (such as the grooved CuCr contact product) mainly through the turning and milling combined machine tool processing configured with a power tool, the groove milling processing and the turning processing with the rotation characteristic is limited by the product structure manufacturability, the processing machine tool function and the configuration characteristic, and the comprehensive processing efficiency is not high.
Therefore, how to further improve the comprehensive efficiency of the processing and manufacturing of the slotted contact product is a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects that the slot milling is limited by the product structure manufacturability, the function and the configuration characteristic of a processing machine tool and the comprehensive processing efficiency is not high when a slot-type contact product is prepared by a turning and milling composite processing method in the prior art, and provides a processing method of the slot-type contact product.
After a great deal of creative work, the inventors found that: a water-cutting high-efficiency rough machining groove is adopted for a prefabricated contact product blank, and a finish machining allowance of 0.15-0.2mm is reserved on one side; through the cooperation of CCD visual identification positioning and an industrial robot, a product is stably clamped and positioned to a machine tool chuck, and then turning and milling combined machining is carried out, so that the finish machining of a product groove and the finish machining of other rotary characteristics are realized; the machining efficiency of the product can be integrally improved on the premise of meeting the product quality, and the machining efficiency of the grooved contact product has good efficiency advantages for batch machining production of grooved contact products.
The invention provides a processing method of a grooved contact product, which comprises the following steps:
(1) clamping a blank of a contact product in a self-centering manner, roughly machining a groove by a water cutting process, and reserving a finish machining allowance of 0.15-0.2mm on one side to obtain an intermediate product A; wherein:
in the water cutting process, the feed multiplying power is less than or equal to 70 percent, and the cutting abrasive is less than or equal to 80 meshes;
(2) positioning the intermediate product A in the step (1) to a machine tool chuck through the cooperation of CCD visual identification positioning and an industrial robot, and performing a turning and milling combined machining process; wherein:
the CCD visual identification positioning is arranged outside the machine tool through a preset positioning mechanism, wherein the identification precision of a CCD camera is at least 0.01mm/pixel, the shooting mode of the CCD external camera is an area-array camera frame exposure mode, and the light source of the CCD camera is selected to be a coaxial light source; the positioning precision of the preset positioning mechanism is 0.01 mm;
the repeated positioning precision of the industrial robot is 0.010-0.050mm, and a clamping mechanism of the industrial robot is of a rigid structure;
and when the intermediate product A is positioned to the chuck of the machine tool, the intermediate product A is in an under-positioned state.
In the present invention, the contact product may be a contact product conventional in the art, such as a CuCr contact product.
The CuCr contact product can comprise the components of CuCr25, CuCr30, CuCr35, CuCr40, CuCr45 or CuCr50, wherein the number represents the mass percentage content of Cr in the CuCr contact product.
In the invention, the thickness of the contact product is generally less than or equal to 15 mm.
In the invention, the blank of the contact product is generally controlled to have the consistency of size and shape, so that a good rough machining reference is provided for subsequent machining.
When the contact product is a CuCr contact product, preferably, the radial dimension tolerance of a blank of the contact product is +/-0.1 mm.
When the contact product is a CuCr contact product, preferably, the radial runout of a blank of the contact product is less than or equal to 0.05 mm.
When the contact product is a CuCr contact product, the axial dimensional tolerance of a blank of the contact product is preferably +0.05/0 mm.
When the contact product is a CuCr contact product, preferably, the parallelism tolerance of the two axial end faces of the blank of the contact product is less than or equal to the axial dimension tolerance.
When the contact product is a CuCr contact product, the surface roughness of the blank of the contact product is Ra3.2 μm.
In the step (1), the self-centering clamping can ensure the geometric position of the slot of the intermediate product A relative to the rotation center, thereby ensuring that the reserved allowance can be uniformly distributed in the indexing direction.
In the step (1), the water cutting process may perform any curved cutting process on any material. The heat generated during the cutting process will immediately be carried away by the water jet without causing harm. The material is not needed to be or is easy to be reprocessed after being cut, and the method is safe and environment-friendly, and has higher speed, higher speed and higher efficiency. This technique facilitates cold cutting of the material without altering its physicochemical properties.
In the step (1), in the water cutting process, the feed magnification is preferably 50 to 70%, for example, 50% or 70%.
In the step (1), in the water cutting process, the cutting abrasive is preferably 80 meshes.
In the step (1), the water cutting process rough machining tank can be carried out by adopting the following method: and clamping the blank of the contact product by adopting the end face positioning outer diameter of a self-centering clamp, roughly cutting a groove by using a water jet cutter, reserving a finish machining allowance of 0.15-0.2mm on one side, and cutting under the conditions that the feeding multiplying factor is less than or equal to 70 percent and the cutting abrasive is less than or equal to 80 meshes on the premise that the width difference of the cutting groove width on the two side edges in the axial direction of the blank is less than or equal to 0.05mm, the cutting surface roughness Ra3.2 mu m and the water cutting material residue (burr) is less than or equal to 0.1 mm.
In the step (1), preferably, the width difference between the widths of the cutting grooves of the intermediate product A at the two side edges of the blank in the axial direction is less than or equal to 0.05 mm.
In the step (1), preferably, the cutting surface roughness of the intermediate product a is ra3.2 μm.
In the step (1), preferably, the residue of the water cutting material of the intermediate product A is less than or equal to 0.1 mm.
In the step (1), the intermediate product A can be cleaned of metal mud and water-based stains on the surface of the product by adopting ultrasonic cleaning or other suitable cleaning processes, and is dehydrated and dried. Drying to prevent visible water drop residue.
In the step (2), the CCD camera recognition precision is preferably 0.01 mm/pixel.
In the step (2), the repeated positioning precision of the industrial robot is preferably 0.010mm or 0.050 mm.
In the step (2), the CCD vision recognition positioning and the industrial robot technology are combined, so that the indexing direction position recognition and accurate positioning and clamping of the grooved contact product can be realized, and the processing efficiency and the processing precision of the product can be improved.
In the step (2), the accurate positions of the radial direction and the indexing direction of the product can be obtained by means of the visual identification function carried by the robot, the product can be accurately grabbed by means of the rotation adjustment and dispatching of the clamping jaw of the robot, then the product is conveyed to the chuck of the machine tool by the manipulator and is in butt joint exchange with the chuck of the machine tool, the requirement on the concentricity of the butt joint needs to be met during the exchange, the clamping jaw of the manipulator can be loosened after the clamping jaw of the spindle is clamped, and the indexing positioning precision is guaranteed.
Before the accurate positions of the radial direction and the indexing direction of a product are obtained by means of the visual identification function carried by the robot, the robot can manually code the material to the matrix bin (attention is paid to distinguishing the groove turning direction), and the robot can be integrated to sort and code the material if necessary.
In the matrix storage bin, a separate positioning mechanism can be arranged to ensure the initial placement position of the product, including the radial limitation and the verticality requirement.
In the step (2), the turning and milling combined machining process generally comprises rough machining and finish machining.
Wherein, a fine finishing allowance of 0.05mm is reserved in the rough machining.
Wherein, the finish machining can be carried out by using an independent milling cutter, and a single-side (0.05mm double-side) allowance of 0.025mm is reserved when a groove is semi-finished; the grooves are then finished using a separate milling cutter.
Wherein the feeding multiplying power of the finishing can be 100-150%, such as 100% or 150%.
Wherein, the finish machining mode can be 1-cutter deep finish milling.
In the step (2), after the turning and milling composite processing technology, degreasing treatment and vacuum drying can be carried out.
The degreasing treatment is generally to degrease oil pollution in the turning and milling composite processing process, so that the product meets the requirement of surface cleanliness.
Wherein the vacuum drying eliminates the risk of short term oxidation of the product.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The reagents and starting materials used in the present invention are commercially available.
The positive progress effects of the invention are as follows:
the processing method of the invention adopts the advantage of high efficiency of the water cutting processing tank, realizes the rapid rough processing of the tank, and reserves a finish processing allowance of 0.15-0.2mm on a single side; through CCD visual identification location and industrial robot's cooperation, make the stable clamping of product fix a position the lathe chuck, realize the finish machining in product groove and the finish machining of other gyration characteristics to under the prerequisite that satisfies product quality, make the machining efficiency of product promote by whole. The processing method can improve the comprehensive processing efficiency of single products by 25-40%. The method has good efficiency advantage for the batch processing production of the grooved contact parts (such as CuCr contact parts).
Drawings
Fig. 1 is a schematic structural view of a slotted CuCr contact product manufactured in embodiment 1.
Fig. 2 is a diagram of a blank in example 1.
FIG. 3 is a schematic diagram of the product of example 1 after water-cutting the rough-machined tank.
FIG. 4 is a schematic view of the product of example 1 after the turning and milling combined process.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
Step 1: a blank of a pre-formed CuCr contact (CuCr35, where the numbers represent the mass percent of Cr in the CuCr contact). The consistency of the size and the shape of the blank is controlled, a good rough machining reference is provided for subsequent machining, and the requirement of an automatic machining technology is met. The method comprises the following steps: the tolerance of the radial dimension is +/-0.1 mm, and the radial run-out is less than or equal to 0.05 mm; the axial dimension tolerance is plus 0.05/0mm, and the parallelism tolerance of the two axial end faces is less than or equal to the axial dimension tolerance; surface roughness Ra3.2 μm; the thickness of the blank is less than or equal to 15 mm. The blank is shown in figure 2.
Step 2: and (4) water cutting rough machining tank. And the end face of the self-centering clamp is used for positioning and clamping the outer diameter. And a water jet cutter is used for roughly cutting the groove, and a finish machining allowance is reserved on one side of the groove by 0.15-0.2 mm. On the premise of keeping the width difference of the cutting groove width at the two side edges of the blank in the axial direction less than or equal to 0.05mm, the cutting surface roughness Ra3.2 mu m and the water cutting material residue (burr) less than or equal to 0.1mm, a quartz sand grinding material with the multiplying power of 50 percent and the grain size of 80 meshes is used for cutting for 120s to obtain an intermediate product A. The morphology of the product after water cutting of the rough tank is shown in fig. 3.
And step 3: and (5) cleaning and drying. And cleaning the metal mud and the water-based stains on the surface of the product by adopting ultrasonic cleaning or other suitable cleaning processes, and dehydrating and drying. Drying to prevent visible water drop residue.
And 4, step 4: and (5) turning and milling to obtain a composite finished product. Manual stacking is carried out on the materials to a matrix bin (attention is paid to distinguishing groove rotating directions), and a vision robot can be integrated to sort and stack the materials when necessary. Secondly, the CCD visual identification and positioning are arranged outside the machine tool, and an independent positioning mechanism is configured to be connected with the CCD visual identification and positioning to ensure the initial placing position of the product, including the requirements on radial limitation and verticality, wherein: the identification precision of the CCD camera is 0.01mm/pixel, the shooting mode of the CCD external camera is an area-array camera frame exposure mode, the CCD camera light source is selected to be a coaxial light source, and the positioning precision of the preset positioning mechanism is 0.01 mm. The accurate position of radial and the graduation direction of product is obtained to the vision recognition function that relies on the robot to carry, accurately snatch the product through the rotatory adjustment scheduling of robot clamping jaw, then send to the lathe chuck and dock the exchange with it through the manipulator, and must guarantee the concentricity requirement of butt joint during this exchange (when fixing a position to the lathe chuck, the product is the state of owing to fix a position), must guarantee to press from both sides tight back manipulator jack catch and just can loosen when the main shaft jack catch, in order to guarantee graduation positioning accuracy, wherein, the repeated positioning accuracy of robot is 0.010 mm. And fourthly, roughly processing each rotation characteristic, and reserving a fine processing allowance of 0.05 mm. Using an independent milling cutter to semi-finish the groove, and reserving a single side (0.05mm double side) allowance of 0.025 mm; and then an independent milling cutter is used for finely processing the groove, the finish milling is carried out by 150% of feed multiplying power and 1 cutter-plunged deep profile, and 203s is processed. And sixthly, finishing the rotation characteristics. And seventhly, turning around, and performing rough machining and finish machining on the residual rotation characteristics respectively. The form diagram of the product after the turning and milling combined machining is shown in fig. 4, and the structural schematic diagram is shown in fig. 1.
And 5: degreasing and vacuum drying. The degreasing treatment is mainly carried out on oil pollution in the turning and milling composite processing process, so that the product meets the requirement of surface cleanliness, and the vacuum drying is carried out to eliminate the short-time oxidation risk of the product.
Step 6: final inspection and vacuum packaging. And carrying out size and appearance inspection according to the inspection protocol. And (5) carrying out vacuum packaging after the inspection is qualified.
The comprehensive processing efficiency of the single product of the grooved CuCr contact product can be improved by 31.5 percent through the steps.
Examples 2 to 4
The processes of examples 2 to 4 are shown in tables 1 and 2, and the rest are the same as example 1.
TABLE 1
Note: the feed multiplying power in the water cutting process and the turning and milling composite machining process refers to the feed multiplying power of a machine tool; the finish milling of the 1-cutter deep-cut contour in the finish machining mode means that the depth of one-time cutter cutting is set to be the thickness size of a product, and groove characteristics are finish milled according to the contour milling mode.
TABLE 2
The processing times obtained in examples 1 to 4 were 373s, 343s, 382s, and 412s, respectively, under the above parameters. Since the capacity and efficiency of cleaning is much higher than the processing time, the time impact of this factor on the processing of the individual pieces is negligible. The correction coefficients (including time deviation brought by material turnover, production scheduling factors, CCD identification and positioning adjustment time consumption and the like) of additional utilization time are considered, and the comprehensive processing time after 1.1 times of reference correction is respectively 411s, 377s, 420s and 453 s. On the basis of meeting the equivalent processing quality requirement, compared with the comprehensive processing time (600s) of the NCN turning and milling composite processing technology, the comprehensive processing time of the technology of the embodiments 1 to 4 respectively improves the comprehensive processing efficiency by 31.5 percent, 37.2 percent, 30 percent and 24.5 percent.
In addition, in the embodiments 1 to 4, since the finish machining is performed under the condition that the finish machining allowance is greatly reduced after the rough grooving, the cutting wear of the tool tends to be reduced, the service life is prolonged, and the machining quality of the product tends to be more stable.
The processing results of the above examples 1 to 4 can satisfy the product quality requirements, and the specific requirements are as follows: surface structure (roughness) Ra0.8 μm; non-deterministic or undefined shape edge states: observing all the edge edges by a 10 multiplied optical magnifier without visible burr residues; appearance quality: the appearance is metal solid luster and consistent, the surface processing texture direction is consistent, and the surface has no defects of scratches, residues, pits, bumps, enrichment and the like.
Effect example 1
The rough-machined grooves cut with the water in the examples 1 to 4 were measured for surface roughness and machining indexing accuracy, and the specific data are shown in table 3 below.
Detecting the roughness by using a roughness meter; and evaluating the verticality of the fitting geometric center of any two adjacent grooves of the intermediate product A, and detecting the machining indexing precision by using an optical projection measuring instrument.
TABLE 3
Comparative examples 1 to 1
In step 2, the water cutting process is used to roughly process the tank, and a finishing allowance of 0.1mm is reserved on one side, and the rest is the same as that in the embodiment 1.
The CuCr contact product obtained in the comparative example 1-1 has the phenomenon that the surface cannot be finished due to insufficient reserved allowance, and the product meeting the performance requirement cannot be obtained.
Comparative examples 1 to 2
In step 2, the water cutting process is used to roughly process the tank, and a finishing allowance of 0.3mm is reserved on one side, and the rest is the same as that in the embodiment 1.
The CuCr contact products obtained in the comparative examples 1-2 have the defects of reduced service life of the cutter and unstable surface processing quality due to overlarge reserved allowance, and cannot obtain products meeting performance requirements.
Comparative example 2 to 1
In step 2, the feed magnification of the tank is 100% for the water cutting process rough machining, and the rest is the same as example 1.
The CuCr contact product obtained in the comparative example 2 has overlarge flanging burrs at the lower edge (the side from which a cutter is taken out), and the surface roughness Ra 6.3 mu m after the water cutting process affects the accuracy of subsequent visual positioning, so that the product meeting the performance requirement cannot be obtained.
Comparative examples 2 to 2
In step 2, the water cutting process is used to roughly machine the tank, and if the quartz sand abrasive is 120 meshes, the rest is the same as in example 1.
The CuCr contact product obtained in the comparative example 3 has overlarge flanging burrs at the lower edge (the side from which a cutter is taken out), and the surface roughness Ra 6.3-12.5 mu m after the water cutting process influences the accuracy of subsequent visual positioning, so that the product meeting the performance requirement cannot be obtained.
Comparative example 3-1
In step 4, in the CCD visual recognition positioning, the recognition accuracy of the CCD camera is 0.1mm/pixel, the shooting mode of the CCD external camera is the area-array camera frame exposure mode, the light source of the CCD camera is selected as the coaxial light source, the positioning accuracy of the preset positioning mechanism is 0.01mm, and the rest is the same as in embodiment 1.
The comparative example can not realize accurate positioning of products, and the phenomenon that one side of the groove with a certain proportion is over-cut and the other side is not cut can not be generated, so that the products meeting the performance requirements can not be obtained.
Comparative examples 3 to 2
In step 4, in the CCD visual recognition positioning, the recognition accuracy of the CCD camera is 0.01mm/pixel, the shooting mode of the CCD external camera is the area-array camera frame exposure mode, the light source of the CCD camera is selected to be a point light source, and the positioning accuracy of the preset positioning mechanism is 0.01mm, as in the remaining embodiment 1.
The comparative example can not realize the accurate positioning of the product, and the phenomenon that the groove with a certain proportion is over-cut and not cut at the same time can not be generated, so that the product meeting the performance requirement can not be obtained.
Comparative examples 3 to 3
In step 4, in the CCD visual recognition positioning, the recognition accuracy of the CCD camera is 0.01mm/pixel, the shooting mode of the CCD external camera is the area-array camera frame exposure mode, the light source of the CCD camera is selected as the coaxial light source, the positioning accuracy of the preset positioning mechanism is 0.1mm, and the rest is the same as in embodiment 1.
The comparative example can not realize accurate positioning of products, the phenomenon that one side of the groove with a certain proportion is over-cut and the other side is not cut occurs, and products meeting performance requirements can not be obtained.
Comparative examples 3 to 4
In step 4, during the CCD visual recognition positioning, the CCD camera recognition accuracy is 0.01mm/pixel, the shooting mode of the CCD external camera is linear scanning/roller shutter exposure mode, the CCD camera light source is selected as a coaxial light source, the positioning accuracy of the preset positioning mechanism is 0.01mm, and the rest is the same as in embodiment 1.
The accurate positioning time of the comparative example product is longer, and the comprehensive processing efficiency is influenced; or the exposure time is limited, although the comprehensive processing high efficiency is not influenced, the accuracy of visual positioning is reduced, and products meeting performance requirements cannot be obtained.
Comparative example 4
In step 4, the robot has a repeated positioning accuracy of 0.15mm, as in example 1.
The comparative example can not realize accurate positioning of products, and the phenomenon that one side of the groove with a certain proportion is over-cut and the other side is not cut can not be generated, so that the products meeting the performance requirements can not be obtained.
Claims (10)
1. A method for processing a grooved contact product is characterized by comprising the following steps:
(1) clamping a blank of a contact product in a self-centering manner, roughly machining a groove by a water cutting process, and reserving a finish machining allowance of 0.15-0.2mm on one side to obtain an intermediate product A; wherein:
in the water cutting process, the feed multiplying power is less than or equal to 70 percent, and the cutting abrasive is less than or equal to 80 meshes;
(2) positioning the intermediate product A in the step (1) to a machine tool chuck through the cooperation of CCD visual identification positioning and an industrial robot, and performing a turning and milling combined machining process; wherein:
the CCD visual identification positioning is arranged outside the machine tool through a preset positioning mechanism, wherein the identification precision of a CCD camera is at least 0.01mm/pixel, the shooting mode of the CCD external camera is an area-array camera frame exposure mode, and the light source of the CCD camera is selected to be a coaxial light source; the positioning precision of the preset positioning mechanism is 0.01 mm;
the repeated positioning precision of the industrial robot is 0.010-0.050mm, and a clamping mechanism of the industrial robot is of a rigid structure;
and when the intermediate product A is positioned to the chuck of the machine tool, the intermediate product A is in an under-positioned state.
2. A method of forming a slot-type contact product as claimed in claim 1, wherein the contact product is a CuCr contact product;
and/or the thickness of the contact product is less than or equal to 15 mm.
3. A method of forming a slot-type contact product according to claim 2, wherein the CuCr contact product has a composition of CuCr25, CuCr30, CuCr35, CuCr40, CuCr45, or CuCr50, wherein the numbers represent the percentage by mass of Cr in the CuCr contact product;
and/or when the contact product is a CuCr contact product, the radial dimensional tolerance of a blank of the contact product is +/-0.1 mm;
and/or when the contact product is a CuCr contact product, the radial runout of a blank of the contact product is less than or equal to 0.05 mm;
and/or when the contact product is a CuCr contact product, the axial dimensional tolerance of a blank of the contact product is +0.05/0 mm;
and/or when the contact product is a CuCr contact product, the parallelism tolerance of two axial end faces of a blank of the contact product is less than or equal to the axial dimension tolerance;
and/or when the contact product is a CuCr contact product, the surface roughness of the blank of the contact product is Ra3.2 mu m.
4. The method for processing a slot-type contact product according to claim 1, wherein in the step (1), in the water cutting process, the feed magnification is 50-70%;
and/or in the step (1), in the water cutting process, the cutting abrasive is 80 meshes.
5. The method for processing a slot-type contact product according to claim 1, wherein in the step (1), the width difference between the slot width of the intermediate product A and the two side edges of the blank in the axial direction is less than or equal to 0.05 mm;
and/or in the step (1), the cutting surface roughness of the intermediate product A is Ra3.2 mu m;
and/or in the step (1), the residue of the water cutting material of the intermediate product A is less than or equal to 0.1 mm.
6. A method of processing a slot-type contact product according to claim 1, wherein in the step (2), the CCD camera recognition accuracy is 0.01 mm/pixel;
and/or in the step (2), the repeated positioning precision of the industrial robot is 0.010mm or 0.050 mm.
7. A method of forming a grooved contact product as recited in claim 1, wherein the turning and milling combined process in step (2) includes rough machining and finish machining.
8. A method of forming a grooved contact product as claimed in claim 7, wherein a 0.05mm finishing allowance is reserved for the rough machining.
9. A method of forming a grooved contact product as recited in claim 7, wherein the finishing is performed using a separate mill;
and/or the feeding multiplying power of the finish machining is 150% of 100-;
and/or the finish machining mode is a 1-cutter deep finish milling mode.
10. A method of forming a slotted contact product according to claim 9, wherein the finishing process is performed by: when the groove is semi-finished, a single-side allowance of 0.025mm is left, and then the groove is finished by using an independent milling cutter;
and/or the feed magnification of the finishing is 100% or 150%.
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| US20030053045A1 (en) * | 2001-09-20 | 2003-03-20 | Doering John W. | System for inspecting a flat sheet workpiece |
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| CN101244564A (en) * | 2008-03-21 | 2008-08-20 | 哈尔滨工业大学 | Tool quick-switching interface for telecontrolling welding robot |
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