CN103008703A - Special forming tool for deep hole double-sealing toothed valve seat - Google Patents
Special forming tool for deep hole double-sealing toothed valve seat Download PDFInfo
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- CN103008703A CN103008703A CN2012105180942A CN201210518094A CN103008703A CN 103008703 A CN103008703 A CN 103008703A CN 2012105180942 A CN2012105180942 A CN 2012105180942A CN 201210518094 A CN201210518094 A CN 201210518094A CN 103008703 A CN103008703 A CN 103008703A
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- Prior art keywords
- valve seat
- double containment
- tooth
- forming tool
- cutting
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- 238000007789 sealing Methods 0.000 title abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 67
- 230000008685 targeting Effects 0.000 claims description 22
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 238000007514 turning Methods 0.000 abstract description 8
- 230000007704 transition Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010730 cutting oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000005068 cooling lubricant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The invention provides a special forming tool for a deep hole double-sealing toothed valve seat. The special forming tool comprises a guiding part, a cutting part, a connecting part and a handle part which are sequentially connected with each other along the central line of the tool, and the guiding part is used for calibrating the relative positions of a formed turning tool and a processed product; the cutting part adopts single-blade cutting, and the other side of the cutting part is ground flat; the connecting part is used for the transition connection of the cutting part and the handle part; and the handle is used for connecting with a machine tool. The tool can be used for avoiding the processing error which is caused by decentration of a double-cutting blade structure, moreover, the strength and service life of the tool can be improved; and the tool is suitable for machine tools of various specification series, has the advantages of high processing precision, wide application scope and the like, is simple in structure and is low in manufacturing cost.
Description
Technical field
The present invention relates to a kind of forming tool, especially for the special-purpose forming tool of deep hole processing double containment tooth valve seat.
Background technology
A kind of seal valve seat be positioned at housing inner chamber depths (〉=30mm), be double containment toothing form, the crudy of this double containment tooth valve seat directly affects the air-tightness requirement after the assembling of this valve.But, material dark because of the seal receptacle position glues and is bidentate, in the processing and manufacturing process, be not easy to cooling and lubricating and chip removal, produce easily and shake cutter and gnaw cutter, and can not utilize polishing to improve surface roughness because the position is dark, thereby cause its surface quality and sealing odontoid not to meet design requirement.When traditional Double-cutter head structure formation lathe tool is processed such part, even the centre of gyration of valve seat forming-tool center and product has the decentraction of 0.1mm, also can be in depression
Position turning goes out the facet of about 0.2mm, can not satisfy processing request, thereby becomes the processing difficult problem in the production.
Because part to be processed is applied to the uniqueness of space industry, determined also not to be applicable at home at present the forming tool of deep hole processing double containment tooth valve seat.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides the special-purpose forming tool of a kind of deep hole double containment tooth valve seat, eliminated error, increased the intensity of cutter, improved service life and machining accuracy.
The technical solution adopted for the present invention to solve the technical problems is: comprise the targeting part, cutting tip, coupling part and the shank that connect successively along the center cutter line.
It is flat that described cutting tip is that the cylinder both sides are cut, and drive cutting edge, the shape of the shape of cutting edge and size and processed double containment tooth and measure-alike in center cutter line one side of end face apart from center cutter line and double containment tooth radius of a circle location of equal place; The cutting edge dimensional tolerance is got the upper limit of processed double containment teeth size tolerance; Opposite side along center cutter line and cutting edge symmetry does not participate in cutting, but keeps stock removal, and upper deviation amount added 0.5～1mm at the bottom of stock removal equaled the blades of cutting tools tooth; Cutting portion is 6 °～15 ° relief angles separately;
Described targeting part is positioned at forming tool foremost, and is tapered along center cutter line direction, and cone angle is 6 degree or 10 degree, external diameter equals double containment tooth centre bore internal diameter, section is the zigzag structure, and the secondary relief angle is opened in the cutter direction of rotation in two ends, is respectively 6 ° and 28 °; Length is less than 2mm;
Described cutting tip seamlessly transits to shank by the coupling part;
The described shank side of being handle, rectangular shank, cylindrical handle or taper shank.
The overall length of described targeting part, cutting tip, coupling part and shank equals deep hole double containment tooth depth and adds that machine tool system holding cutter shank length adds 15～30mm.
The invention has the beneficial effects as follows:
(1) the present invention adopts the single-blade cutting, both avoided the nonconcentricity error of Double-head forming turning tool itself, depart from the error that workpiece centre causes secondary cutting to produce when having eliminated again tool setting, avoided the sagging position of valve seat the facet problem to occur, also increased simultaneously the intensity of cutter, improved service life, machining accuracy is high;
(2) the present invention contains the cutting targeting part, is used for the relative position between calibration shaped profile turning cutter and the product to be processed, guarantees dimensional accuracy and the positional precision of sealing tooth valve seat processing, also is simultaneously whether qualified gauge of examining workpieces central hole size;
(3) shank architectural feature of the present invention can be taper shank, square handle and cylindrical handle etc., is suitable for the lathe of plurality of specifications series, and is applied widely.
Description of drawings
Fig. 1 is deep hole double containment tooth valve seat schematic diagram;
Fig. 2 is double containment flute profile valve seat construction;
Fig. 3 is for being used for the front view of processing double containment tooth valve seat formed turning tool;
Fig. 4 is for being used for the top view of processing double containment tooth valve seat formed turning tool;
Fig. 5 is for being used for the enlarged drawing of processing double containment tooth valve seat formed turning tool cutting tip;
Fig. 6 is for being used for the cutaway view (analysing and observe direction and position as shown in Figure 3) of processing double containment tooth valve seat formed turning tool targeting part.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
The invention provides a kind of forming tool, realize that deep hole double seal valve toothholder time processing is shaped.Forming tool is from foremost, coupling part 3 and shank 4 four parts by targeting part 1, cutting tip 2, cutting tip and shank form successively, cutter is the monoblock type forming tool, can realize only can finishing all manufacturing procedures by time processing, can guarantee the workpiece to be machined surface quality again, process procedure is few, and quality control is simple, and is easy to process.
Technical solution of the present invention comprise following some:
(1) cutting tip
The shaping by stock removal that is used for double containment tooth valve seat construction feature, it is characterized in that: the cylinder both sides are cut flat, and drive cutting edge at distance center cutter line and double containment tooth radius of a circle location of equal place, adopt the single-blade cutting, the shape of the shape of cutting edge and size and processed double containment tooth and measure-alike.Consider the factors such as tool wear, mismachining tolerance, the cutting edge dimensional tolerance is got the upper limit of processed double containment teeth size tolerance.Do not participate in cutting along the center cutter line with containing the other end that cutting edge one end is centrosymmetric, but enough stock removals will be arranged, guarantee not affect machining, it is definite that stock removal press following formula:
The upper deviation at the bottom of stock removal=blades of cutting tools tooth+(0.5～1) mm
Annotate: 0.5～1 is definite according to processed material.
(2) targeting part
Targeting part 1 is positioned at forming tool foremost, be used for guiding cutting tip 2 and be in all the time accurately Working position in the process of processing double containment tooth valve seat, guaranteeing dimensional accuracy and the positional precision of the processing of sealing tooth valve seat, also is simultaneously whether qualified gauge of examining workpieces central hole size.Targeting part is tapered along its length, and cone angle is 6 degree or 10 degree, and external diameter equals double containment tooth centre bore internal diameter, and section is the zigzag structure, and the secondary relief angle is opened in the cutter direction of rotation in two ends.
(3) coupling part of cutting tip and shank
The coupling part is used for blades of cutting tools 2 and is connected the transition of retained part with shank and connects between cutting tip 2 and shank 4, is the rigidity that increases forming tool, and both sides, coupling part circular arc is cut flat.
(4) shank structure
Be used for being connected transferring power with lathe.According to the interface characteristics of machine tool system, shank 4 versions that determined cutter, shank 4 structures can the side's of being handles, rectangular shank, cylindrical handle and taper shank.Shank 4 long poor rigidity and resistance to cutting are greatly the main causes that produces chatter mark and gnaw cutter, chip removal can't be observed, be not easy to very much to vestibule in the deep processing and the sufficient cooling-lubricant of can not annotating is the secondary cause that produces chatter mark and gnaw cutter, for increasing the rigidity of tool shank 4, the structure of shank 4 and size be difference according to the difference of the employed machine tool type of deep hole processing double containment tooth.For same lathe, the structure of shank 4 and size also change along with the variation of product to be processed size.Physical relationship between the structure of shank 4 and size and the lathe is as follows:
For engine lathe, square handle and rectangular shank sectional dimension are chosen according to lathe center height, see Table 1.
Table 1(mm)
| The lathe center is high | 150 | 180～200 | 260～300 | 350～400 |
| Handle cross section (length * height), side | 16×16 | 20×20 | 25×25 | 32×32 |
| Rectangular shank cross section (length * height) | 12×20 | 16×25 | 20×32 | 25×40 |
For numerically controlled lathe and machining center, cylinder shank physical dimension sees Table 2.
Table 2(mm)
Annotate: tool bit diameter=sealing tooth outside diameter+(2～10) mm.Together lower.
For machining center, the used Morse taper shank of forming tool is shown in Table 3.
Table 3(mm)
(5) tool geometry angle is selected
According to workpiece to be machined material, cutter material and processing conditions etc., targeting part 1 is opened 6 ° or 10 ° of cone angles, and adopts the secondary relief angle, is respectively 6 ° and 28 °; Cutting tip 2 is only opened 6 °～15 ° of relief angles, is beneficial to chip removal.
(6) the forming tool overall length is determined
The long axiality of tool length and poor rigidity produce easily chatter mark and gnaw cutter; Too short, to process less than or easily produce and interfere, impact seals the tooth machining.The cutter overall length is pressed following formula and is determined:
Cutter overall length=sealing tooth depth+machine tool system holding cutter shank length+(15～30) mm
Behind the rounding, as forming tool overall length size.
During deep hole processing double containment tooth valve seat, utilize machine tool system holding cutter shank 4, use tool setting gauge tool setting and centering, make center cutter line and valve base center hole misalignment be not more than 0.01mm; Feed, targeting part 1 is introduced into valve base center hole in advance, with dimensional accuracy and the positional precision that guarantees that sealing tooth valve seat is processed, and check valve seat workpiece center hole size; Continue feed, cutting tip 2 processing sealing tooth valve seats are to machining; The coupling part 3 of cutting tip and shank is not participated in the product cutting process directly, only is used for the transition that blades of cutting tools 2 is connected with shank and connects.
Following embodiment is in order to further specify the specific embodiment of the present invention and effect, but the present invention is not limited in following examples.As shown in Figure 1 and Figure 2, be the partial enlarged drawing of deep hole double containment tooth valve seat schematic diagram and double containment tooth, Fig. 3～Fig. 6 is the dependency structure view of the forming tool of processing double containment tooth valve seat.
As shown in Figure 3, forming tool is comprised of coupling part 3 and shank 4 four parts of targeting part 1, cutting tip 2, cutting tip and shank.Targeting part 1 is used for guaranteeing dimensional accuracy and the positional precision of sealing tooth valve seat processing, also is whether qualified gauge of examining workpieces central hole size; Cutting tip 2 adopts the single-blade cutting, and such as Fig. 2 and shown in Figure 5, the shape of its geometric properties and product to be processed and measure-alike is for the shaping by stock removal of bearing double containment tooth valve seat geometry feature; The coupling part 3 of cutting tip and shank is used for the transition connection that blades of cutting tools 2 is connected with shank, is the rigidity that increases forming tool, and both sides, coupling part circular arc is cut flat, and its geometric properties as shown in Figure 4; Shank 4 is used for being connected with lathe, and transferring power, its structure be by the tool system interface characteristics decision of using lathe, can the side's of being handle, rectangular shank, cylindrical handle and taper shank.
Workpiece material is high-strength stainless steel, and cutter material is whole hard alloy YD15.
(1) forming tool adopts 5 ° of anterior angles; Adopt the secondary relief angle, be respectively 6 ° and 28 °, cutting tip 2 is only opened 6 ° of relief angles; Targeting part 1 is opened 10 ° of cone angles.
(2) adopt rigidity preferably Multifunctional numerical control lathe breathe out very COBRA65 processing double containment flute profile valve seat, with soft pawl clamping trolley handle of a knife section 4 cylindrical positions, be convenient in clamped one time, finish the processing of interior each size of shape, guaranteed the requirement of concentricity.
(3) processing is front in double containment tooth valve seat location to be processed, smears the cutting oil that lard and carbon tetrachloride are in harmonious proportion.
(4) after tool setting, debugging, cut, control following cutting parameter: with the lathe spindle rotating speed be limited in below 150 rev/mins, the depth of cut＜0.05mm, feed S＜0.04mm/ turn, and processes valve base.Through dissecing metering, have higher dimensional accuracy and shape and position of related features, its surface roughness Ra can reach 0.4, satisfies drawing requirement fully.
As shown in Figure 3, forming tool is comprised of coupling part 3 and shank 4 four parts of targeting part 1, cutting tip 2, cutting tip and shank.Targeting part 1 is used for guaranteeing dimensional accuracy and the positional precision of sealing tooth valve seat processing, also is whether qualified gauge of examining workpieces central hole size; Cutting tip 2 adopts the single-blade cutting, and such as Fig. 2 and shown in Figure 5, the shape of its geometric properties and product to be processed and measure-alike is for the shaping by stock removal of bearing double containment tooth valve seat geometry feature; The coupling part 3 of cutting tip and shank is used for the transition connection that blades of cutting tools 2 is connected with shank, is the rigidity that increases forming tool, and both sides, coupling part circular arc is cut flat, and its geometric properties as shown in Figure 4; Shank 4 is used for being connected with lathe, and transferring power, its structure be by the tool system interface characteristics decision of using lathe, can the side's of being handle, rectangular shank, cylindrical handle and taper shank.
Workpiece material titanium rod TC4M GB/T2965-1996, cutter material is W2Mo9Cr4VCo8(M42).
(1) forming tool adopts 0 ° of anterior angle; Adopt the secondary relief angle, be respectively 10 ° and 28 °, cutting tip 2 is only opened 10 ° of relief angles; Targeting part 1 is opened 6 ° of cone angles.
(2) adopt rigidity preferably Multifunctional numerical control lathe breathe out very COBRA65 processing double containment flute profile valve seat, with soft pawl clamping trolley handle of a knife section 4 cylindrical positions, be convenient in clamped one time, finish the processing of interior each size of shape, guaranteed the requirement of concentricity.
(3) processing is front in double containment tooth valve seat location to be processed, smears the cutting oil that lard and carbon tetrachloride are in harmonious proportion.
(4) after tool setting, debugging, cut, control following cutting parameter: with the lathe spindle rotating speed be limited in below 60 rev/mins, the depth of cut＜0.02mm, feed S＜0.01mm/ turn, and processes valve base.Through dissecing metering, have higher dimensional accuracy and shape and position of related features, its surface roughness Ra can reach 0.8, satisfies drawing requirement fully.
Claims (6)
1. the special-purpose forming tool of deep hole double containment tooth valve seat comprises the targeting part, cutting tip, coupling part and the shank that connect successively along the center cutter line, it is characterized in that:
It is flat that described cutting tip is that the cylinder both sides are cut, and drive cutting edge, the shape of the shape of cutting edge and size and processed double containment tooth and measure-alike in center cutter line one side of end face apart from center cutter line and double containment tooth radius of a circle location of equal place; Opposite side along center cutter line and cutting edge symmetry does not participate in cutting, but keeps stock removal;
Described targeting part is positioned at forming tool foremost, and is tapered along center cutter line direction, and external diameter equals double containment tooth centre bore internal diameter, and section is the zigzag structure;
Described cutting tip seamlessly transits to shank by the coupling part;
The described shank side of being handle, rectangular shank, cylindrical handle or taper shank.
2. the special-purpose forming tool of deep hole double containment tooth valve seat according to claim 1, it is characterized in that: the dimensional tolerance of described cutting edge is got the upper limit of processed double containment teeth size tolerance.
3. the special-purpose forming tool of deep hole double containment tooth valve seat according to claim 1, it is characterized in that: upper deviation amount added 0.5～1mm at the bottom of described stock removal equaled the blades of cutting tools tooth.
4. the special-purpose forming tool of deep hole double containment tooth valve seat according to claim 1, it is characterized in that: described cutting portion is 6 °～15 ° relief angles separately.
5. the special-purpose forming tool of deep hole double containment tooth valve seat according to claim 1, it is characterized in that: the cone angle of described targeting part is 6 degree or 10 degree.
6. the special-purpose forming tool of deep hole double containment tooth valve seat according to claim 1, it is characterized in that: the secondary relief angle is opened in the cutter direction of rotation in the section two ends of described targeting part, is respectively 6 ° and 28 °; The length of targeting part is less than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105180942A CN103008703A (en) | 2012-12-03 | 2012-12-03 | Special forming tool for deep hole double-sealing toothed valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105180942A CN103008703A (en) | 2012-12-03 | 2012-12-03 | Special forming tool for deep hole double-sealing toothed valve seat |
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| Publication Number | Publication Date |
|---|---|
| CN103008703A true CN103008703A (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105180942A Pending CN103008703A (en) | 2012-12-03 | 2012-12-03 | Special forming tool for deep hole double-sealing toothed valve seat |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112453837A (en) * | 2020-12-02 | 2021-03-09 | 四川航天长征装备制造有限公司 | Processing method of valve seat |
| CN113664463A (en) * | 2021-07-28 | 2021-11-19 | 西安航天发动机有限公司 | Numerical control track processing method for valve deep cavity R-shaped valve seat molded surface |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2637757A1 (en) * | 1976-08-21 | 1978-02-23 | Hertel Karl | Form tool for cutting screw thread - has two sets of teeth arranged symmetrically for easy interchange |
| CN2925715Y (en) * | 2006-07-05 | 2007-07-25 | 潍柴动力股份有限公司 | Extruded tap of machining connecting-rod threaded hole |
| CN202097422U (en) * | 2011-05-05 | 2012-01-04 | 成都伍田机械技术有限责任公司 | A New Type of Clamping Carbide Forming Inserts for Protective Ring Machining |
| CN202461632U (en) * | 2011-12-31 | 2012-10-03 | 沪东重机有限公司 | Forming processing cutter for processing forming surface of orifice |
-
2012
- 2012-12-03 CN CN2012105180942A patent/CN103008703A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2637757A1 (en) * | 1976-08-21 | 1978-02-23 | Hertel Karl | Form tool for cutting screw thread - has two sets of teeth arranged symmetrically for easy interchange |
| CN2925715Y (en) * | 2006-07-05 | 2007-07-25 | 潍柴动力股份有限公司 | Extruded tap of machining connecting-rod threaded hole |
| CN202097422U (en) * | 2011-05-05 | 2012-01-04 | 成都伍田机械技术有限责任公司 | A New Type of Clamping Carbide Forming Inserts for Protective Ring Machining |
| CN202461632U (en) * | 2011-12-31 | 2012-10-03 | 沪东重机有限公司 | Forming processing cutter for processing forming surface of orifice |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112453837A (en) * | 2020-12-02 | 2021-03-09 | 四川航天长征装备制造有限公司 | Processing method of valve seat |
| CN113664463A (en) * | 2021-07-28 | 2021-11-19 | 西安航天发动机有限公司 | Numerical control track processing method for valve deep cavity R-shaped valve seat molded surface |
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Application publication date: 20130403 |