CN111015138B - Processing method of powder metallurgy cross slip ring die - Google Patents
Processing method of powder metallurgy cross slip ring die Download PDFInfo
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- CN111015138B CN111015138B CN201911366055.3A CN201911366055A CN111015138B CN 111015138 B CN111015138 B CN 111015138B CN 201911366055 A CN201911366055 A CN 201911366055A CN 111015138 B CN111015138 B CN 111015138B
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
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Abstract
The invention discloses a processing method of a powder metallurgy cross slip ring die, which comprises the following steps of: a processing reference part having a processing outline step and a grinding bottom surface step; processing the outline part, wherein the outline part comprises an inner hole processing step and a notch processing step; a heat treatment part having a tempering step and a bottom surface grinding step; and the fine machining part is provided with a slow wire feeding inner hole step. The processing method of the powder metallurgy cross slip ring die can improve the die precision and reduce deformation and scrap.
Description
Technical Field
The invention relates to die machining, in particular to a machining method of a powder metallurgy cross slip ring die.
Background
The crosshead ring is a part of an automobile compressor and is usually manufactured through powder metallurgy processing.
When the cross slip ring is manufactured, a cross slip ring die is needed, so that punching processing can be performed on the cross slip ring.
The cross slip ring die is a tubular part and has a large inner diameter, a large outer diameter and a thin wall thickness, and the top surface of the cross slip ring die is also provided with a plurality of notches, so that the processing requirement of the cross slip ring is met.
However, the precision of the cross slip ring die is low, and the problem of crack is easy to occur, so that the production of the cross slip ring is influenced.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides a processing method of a powder metallurgy cross slip ring die, which can improve the die precision and reduce deformation and scrap.
The invention is realized by the following technical scheme:
the invention provides a processing method of a powder metallurgy cross slip ring die, which is characterized by comprising the following steps of: a processing reference part having a processing outline step and a grinding bottom surface step; processing the outline part, wherein the outline part comprises an inner hole processing step and a notch processing step; a heat treatment part having a tempering step and a bottom surface grinding step; and the fine machining part is provided with a slow wire feeding inner hole step.
Has the advantages that: compared with the prior art, the processing method of the powder metallurgy cross slip ring die has the advantages that through the steps of processing the shape and grinding the bottom surface, the high-precision end surface reference and the high-precision shape reference can be obtained, the accumulated error is reduced, and the precision of subsequent processing is improved.
Secondly, the inner hole and the notch are processed before the heat treatment part, so that the die can fully release stress in the heat treatment process, and cracking or scrapping caused by stress release in use is reduced.
In addition, the weight of the die before heat treatment is reduced, the workload of heat treatment is reduced, and the energy consumption is reduced.
In addition, according to the processing method of the powder metallurgy cross slip ring die, the bottom surface is polished at the heat treatment part, so that the accuracy of the end surface reference is further improved, the subsequent fine machining is facilitated, and the accuracy of the die is further improved.
In addition, the processing method of the powder metallurgy cross slip ring die further adopts slow wire moving at the finish machining part, so that the inner hole is machined with small acting force, and the influence of elastic deformation on the machining precision is reduced.
The step of grinding the bottom surface means that it is necessary to plane grind at least one end surface, not specifically the bottom surface.
That is, the present invention has an idea that an accurate end surface reference is machined, then the machining of the contour is completed, further, the stress is released by the heat treatment, the reference is corrected in the heat treatment, and finally, the mold having no or small internal stress is finish-machined, thereby improving the accuracy.
According to the processing method of the powder metallurgy cross slip ring mold, in the processing reference part, the step of milling the outer side face is further provided, the step of milling the outer side face is located before the step of grinding the bottom face, and the step of milling the outer side face is used for forming the circumferential reference.
The processing method of the powder metallurgy cross slip ring mold has the advantages that the step of milling the outer side face is further arranged, so that the circumferential datum of the mold is processed, and further, the notch and other hole site structures are accurately processed according to the circumferential datum.
According to the processing method of the powder metallurgy cross slip ring mold, in the processing reference part, a circumferential milling step is further provided, wherein the circumferential milling step is located after the bottom surface grinding step, and the circumferential milling step is used for forming concave positions on the shape.
The processing method of the powder metallurgy cross slip ring die further comprises a circumferential milling step, so that the concave position on the outer shape is processed by taking the outer shape, the outer side face and one end face as references, and the accuracy of the concave position is improved.
According to the processing method of the powder metallurgy cross slip ring mold in the first aspect of the invention, in the step of processing the inner hole, the inner hole is processed in a fast wire moving mode.
The processing method of the powder metallurgy cross slip ring die further processes the inner hole in a fast wire moving mode, so that the solid part forming the inner hole is prevented from being completely cut, the processing efficiency is improved, the energy consumption is reduced, and the solid part is convenient to recycle.
According to the processing method of the powder metallurgy cross slip ring mold in the first aspect of the invention, the notch processing step is located after the inner hole processing step.
The processing method of the powder metallurgy cross slip ring die further has the advantages that the notch processing step is located after the inner hole processing step, so that the workload of notch processing is reduced, the notch processing can be completed by using the fast-moving wire, and the processing efficiency is improved.
According to the processing method of the powder metallurgy cross slip ring mold in the first aspect of the invention, in the processing of the contour part, the top surface milling step is further provided, the top surface milling step is used for processing the top surface part between the inner hole and the outer shape, and the top surface milling step is positioned before the inner hole processing step.
The method for machining the powder metallurgy cross slip ring mold further comprises a top surface milling step, wherein the top surface milling step is arranged before the inner hole machining step, and accordingly workload of the inner hole machining step is reduced, and energy consumption is reduced.
According to the processing method of the powder metallurgy cross slip ring mold, in the heat treatment part, the top surface grinding step is further included, and the top surface grinding step is located after the bottom surface grinding step.
The processing method of the powder metallurgy cross slip ring die further comprises the step of grinding the top surface, so that the precision of the top surface is improved, and the top surface is prevented from inclining relative to the bottom surface due to stress release.
And the step of grinding the top surface is positioned after the step of grinding the bottom surface, so that the top surface is ground after the flatness of the bottom surface is improved, and the precision is higher.
According to the processing method of the powder metallurgy cross slip ring mold in the first aspect of the invention, in the finish machining part, an inner hole electric spark step is further provided, and the inner hole electric spark step is located before the slow wire moving step.
The processing method of the powder metallurgy cross slip ring die further uses the electric spark inner hole, so that the processing allowance is reduced, the slow wire moving time is reduced, and the efficiency is improved.
According to the processing method of the powder metallurgy cross slip ring die in the first aspect of the invention, in the finish machining part, the method further comprises a re-tempering step, wherein the re-tempering step is arranged after the electric spark inner hole step.
The processing method of the powder metallurgy cross slip ring die further comprises a re-tempering step, so that the stress of the die is further released, and the processing precision of the subsequent process is prevented from being influenced.
The processing method of the powder metallurgy cross slip ring mold further comprises a repairing part, wherein the repairing part is provided with a heavy electric spark step and a polishing step, and the polishing step is located after the heavy electric spark step.
The processing method of the powder metallurgy cross slip ring die is provided with the repairing part, so that the assembly is completed, and the manufacture of the cross slip ring is facilitated.
And moreover, the heavy electric spark step is arranged, so that the assembly can be conveniently realized, and the clamping stagnation risk is reduced.
Furthermore, a polishing step is provided to improve the surface finish and reduce the abrasion caused by friction without affecting the size.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a schematic structural diagram of a cross slip ring mold;
FIG. 2 is a flow chart of an embodiment of the present invention.
Reference numerals: 1-shape, 2-bottom surface, 3-top surface, 4-circumferential reference, 5-inner hole, 6-gap and 21-outer side surface.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to FIG. 1, an illustration of a Oldham ring mold is shown as being tubular, having a larger inner and outer diameter and a thinner wall thickness.
On the top surface 3 of the mould, there are also notches 6 to meet the production requirements of the cross slip ring.
In order to improve the processing precision of the cross slip ring die and simultaneously improve the performance and the service life of the cross slip ring die, the processing method of the powder metallurgy cross slip ring die is provided.
Specifically, referring to fig. 2, there are mainly five major parts, for 24 steps.
The four main parts mainly include a machining reference part, a machining contour part, a heat treatment part, a finishing part and a repairing part.
Specifically, the machining reference part mainly refers to steps 1 to 6 to form a machining reference; processing a contour part, mainly comprising steps 7 to 9, so as to process a contour; a heat treatment part, mainly, steps 10 to 14, for improving performance and relieving stress; a finish machining part, mainly comprising steps 15 to 20, so that the size meets the requirements of a drawing; and the repairing part mainly comprises steps 21 to 24, and the assembling is completed, so that the processing of the cross slip ring is convenient.
Of course, the above is just a convenient division, and in actual production, fine adjustment is also performed, so that the production process is optimized.
For convenience of understanding, the working contents of the respective steps are now described in detail:
in step 1, that is, the blanking step, a block-shaped raw material, a columnar raw material, or a tubular raw material can be purchased.
In the step of processing the shape 1, not only one shape 1 but also the coaxial shape 1 can be processed, so that the efficiency is improved.
Of course, in step 2, the outer circle is primarily machined, thereby forming the center datum.
And 3, milling the outer side surface 21, wherein the milled outer side surface 21 is used for forming a circumferential reference, so that grooves and hole positions which are not overlapped with the center of the die can be machined by taking the outer shape 1 and the outer side surface 21 as references.
Of course, the main content of the step of milling the outer side surface 21 is milling the outer side surface 21, but it is also possible to have the content of milling the end surface, the milling direction and the fixture setting needing to be changed correspondingly.
The milling of the end face can be divided into two parts, namely a bottom face 2 and a top face 3, and can be carried out simultaneously or step by step.
And 4, grinding the bottom surface 2, thereby forming an end surface reference and ensuring the perpendicularity of subsequent processing.
And 5, grinding the top surface 3, thereby ensuring that the top surface 3 is parallel to the bottom surface 2 and facilitating the positioning and fixing of the die in the subsequent contour machining.
The bottom surface 2 and the top surface 3 are discussed separately from the end surfaces, and are not limited to the up-down position.
Step 4 and step 5 may also be referred to as plane grinding of the end face, and the division of the two steps is mainly based on the situation that only one end face may be ground.
The groove can also be a process structure and is not set by design requirements. .
And 7, drilling, namely, processing the mounting hole, and simultaneously processing a subsequent fabrication hole for the fast-moving wire.
Step 8, i.e. the step of milling the top surface 3, belongs to the separation of the content of the milled top surface 3 in step 3.
Step 9, namely, the step of processing the inner hole 5 and the notch 6, is conventional, and is directly processed by using a milling mode, preferably, the embodiment adopts a wire cutting mode of fast wire moving, so that the material of the inner hole 5 is integrally removed, the workload is reduced, the efficiency is improved, meanwhile, the energy consumption is reduced, and the material recycling is facilitated.
The notches 6 may be machined in the same manner as the inner bore 5, or may be machined by conventional milling.
And step 10, namely, the heat treatment step, mainly improves the performance and consumes stress through normalizing, annealing, solution heat treatment, aging, solution heat treatment, tempering, steel carbonitriding and the like.
And step 11, namely, the step of grinding the bottom surface 2, which is mainly to grind the bottom surface 2 again, so that the bottom surface 2 is ensured to be flat, the planeness of the bottom surface 2 is improved, and the influence of the reference deviation on the verticality is reduced.
Step 12, namely, the step of grinding the top surface 3, mainly grinds the top surface 3 again to ensure that the top surface 3 is parallel to the bottom surface 2, and corrects the deflection caused by stress release.
Step 13, i.e. the tempering step, is mainly to heat treat the ground bottom surface 2 and top surface 3 to improve the performance.
Step 14, i.e. grinding the top and bottom surfaces 3, 2 again, is determined from the measurement.
And step 15, namely, the step of electric spark inner hole, which is mainly to carry out electric spark on the inner hole 5, thereby reducing the subsequent processing amount of slow wire moving.
Step 16, i.e. the re-tempering step, is primarily to further relieve stress and, at the same time, improve performance.
And step 17, namely, the slow-feeding rough machining step, wherein the inner hole 5 is rough machined by using the profile 1 as a reference.
The slow-speed wire, also called low-speed wire, is a kind of numerically controlled machine tool which uses continuously moving fine metal wire as electrode to make pulse spark discharge to workpiece, and can produce high temp. above 6000 deg.C, remove metal and cut into workpiece.
The principle of slow wire-moving machining is that a gap exists between a wire electrode and a workpiece, and metal is removed by continuous discharge.
Step 18, i.e. the re-tempering step, i.e. the tempering is performed again, so that the stress is further released, and of course, whether to perform the re-tempering step may be determined according to the detection result.
And 19, namely, a slow-wire-feeding fine machining step, namely, fine machining of the inner hole 5 is realized in a slow-wire-feeding mode.
And 20, performing electric spark machining on the shape 1 and the like by taking the machined inner hole 5 of the slow-speed wire as a reference, so as to further improve the precision.
Step 22, i.e. the heavy spark step, performs spark machining on the end faces, i.e. the bottom face 2 and the top face 3, by performing spark again, meeting the design requirements.
Step 23, i.e., the polishing step, is readily understood to be a step of polishing the surface with sandpaper, sanding belt or grinding wheel to improve the surface finish and reduce abrasion.
And 24, detecting the size in a warehouse, and storing the size in a warehouse to facilitate production and use.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The processing method of the powder metallurgy cross slip ring die is characterized by comprising the following steps of:
a processing reference part having a processing outline step and a grinding bottom surface step;
processing the outline part, wherein the outline part comprises an inner hole processing step and a notch processing step;
a heat treatment part having a tempering step and a bottom surface grinding step;
and the fine machining part is provided with a slow wire feeding inner hole step.
2. The method for machining the powder metallurgy cross slip ring mold according to claim 1, wherein in the machining reference portion, a step of milling an outer side surface is further provided, the step of milling the outer side surface is located before the step of grinding the bottom surface, and the step of milling the outer side surface is used for forming a circumferential reference.
3. The processing method of the powder metallurgy cross slip ring mold according to claim 2, wherein a circumferential milling step is further provided in the processing reference part, the circumferential milling step is located after the bottom surface grinding step, and the circumferential milling step is used for forming concave positions on the shape.
4. The method for processing the powder metallurgy cross slip ring mold according to claim 1, wherein in the step of processing the inner hole, the inner hole is processed in a fast wire-moving manner.
5. The method for machining the powder metallurgy cross slip ring mold according to claim 4, wherein the step of machining the notch is located after the step of machining the inner hole.
6. The method for machining the powder metallurgy cross slip ring mold according to claim 4, wherein in the step of machining the contour portion, a step of milling a top surface is further provided, the step of milling the top surface is used for machining the top surface portion between the inner hole and the outer shape, and the step of milling the top surface is located before the step of machining the inner hole.
7. The method for processing the powder metallurgy cross slip ring mold according to claim 1, further comprising a top surface grinding step in the heat treatment part, wherein the top surface grinding step is positioned after the bottom surface grinding step.
8. The method for machining the powder metallurgy cross slip ring mold according to claim 1, wherein in the finish machining part, an inner hole electric spark step is further provided, and the inner hole electric spark step is located before the slow wire moving step.
9. The processing method of the powder metallurgy cross slip ring die as claimed in claim 8,
in the finish machining part, a re-tempering step is further provided, and the re-tempering step is arranged after the electric spark inner hole step.
10. The processing method of the powder metallurgy cross slip ring die as claimed in claim 1,
the method further comprises a repairing part, wherein the repairing part is provided with a heavy electric spark step and a polishing step, and the polishing step is positioned after the heavy electric spark step.
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| CN115365767A (en) * | 2022-08-26 | 2022-11-22 | 山东天工岩土工程设备有限公司 | Powder metallurgy pressing die processing technology and powder metallurgy pressing die |
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| CN102825438A (en) * | 2012-08-29 | 2012-12-19 | 湖北航天三江红林机电科技有限公司 | Processing method of four-station concave die |
| CN103433705A (en) * | 2013-08-20 | 2013-12-11 | 潍坊帅克机械有限责任公司 | Processing technology of robot RV speed reducer needle gear shell |
| CN105499924A (en) * | 2015-12-21 | 2016-04-20 | 无锡格瑞斯精密机械有限公司 | Machining method for molding lower die body of die of pulling ring of ring-pull can |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2575675B2 (en) * | 1986-12-23 | 1997-01-29 | 芳彦 関 | Method for producing styrofoam molding die |
| CN102303221B (en) * | 2011-08-29 | 2013-06-05 | 西南铝业（集团）有限责任公司 | Method for processing female die with large square hole |
| CN103586652A (en) * | 2013-10-15 | 2014-02-19 | 昆山宏凌电子有限公司 | Process for machining male and female dies |
| CN103753124B (en) * | 2013-12-19 | 2016-06-29 | 湖北三江航天红阳机电有限公司 | Massive casting titanium alloy diamond cabin piece housing processing method |
| CN103978105B (en) * | 2014-05-09 | 2016-04-27 | 江苏卡明模具有限公司 | A kind of method for processing and assembling of covering die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102825438A (en) * | 2012-08-29 | 2012-12-19 | 湖北航天三江红林机电科技有限公司 | Processing method of four-station concave die |
| CN103433705A (en) * | 2013-08-20 | 2013-12-11 | 潍坊帅克机械有限责任公司 | Processing technology of robot RV speed reducer needle gear shell |
| CN105499924A (en) * | 2015-12-21 | 2016-04-20 | 无锡格瑞斯精密机械有限公司 | Machining method for molding lower die body of die of pulling ring of ring-pull can |
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