CN101850446B - Finish machining method for tooth form of large modulus rack - Google Patents
Finish machining method for tooth form of large modulus rack Download PDFInfo
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- CN101850446B CN101850446B CN201010187152A CN201010187152A CN101850446B CN 101850446 B CN101850446 B CN 101850446B CN 201010187152 A CN201010187152 A CN 201010187152A CN 201010187152 A CN201010187152 A CN 201010187152A CN 101850446 B CN101850446 B CN 101850446B
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Abstract
The invention discloses a finish machining method for tooth form of a large modulus rack, which has favorable machining quality and low cost. The method is characterized in that a rack subjected to rough finish is installed on a workbench of a numerical control milling and boring machine, a grinding device with a grinding wheel is installed on the end surface of a ram of the numerical control milling and boring machine, the ram and the workbench of the numerical control milling and boring machine relatively move to enable the grinding wheel to grind the tooth form of the rack along a certain track. Rack grinding machining is applied to the numerical control milling and boring machine such as a planer type milling machine by installing the grinding device on the end surface of the ram, thereby expanding the machining range of a universal machine tool, solving the problem that finish machining for the tool form of the large modulus rack can not grind and efficiently enhancing the tooth form accuracy and the tooth surface quality of the rack. The method has the advantages of reliable technology, flexible operation, easy implementation, low needed cost, economy and practicability and is particularly suitable for grinding machining of a large modulus rack by single piece in small batch.
Description
Technical field
The present invention relates to finish machining method for tooth form of large modulus rack.
Background technology
Tooth bar is one of basic driving member important in the gear drive.The height in its bearing capacity and service life is the important symbol of tooth bar manufacturing technology level.Big modulus tooth bar in existing mining equiment and the metallurgical equipments such as forging and pressing, steel rolling; Its profile accuracy adopts 8 grades～9 grades medium accuracy grades of national standard (GB1009-88); Tooth face hardness adopts the medium hardness of HB≤350, and tooth-face roughness Ra requires 3.2～1.6 μ m.This type of tooth form of large modulus rack fine finishining adopts milling method can arrive the product design drawing requirement fully.
Hard flank of tooth tooth bar has appearred in some specialities in recent years.Its profile accuracy of this type tooth bar adopts and is equivalent to 7 grades～8 grades of national standards (GB1009-88) than higher accuracy class, and tooth face hardness adopts more than the HRC55, and tooth-face roughness Ra requires 0.8 μ m.For the fine finishining of the hard flank of tooth tooth bar of big modulus profile of tooth, receive the restriction of existing equipment for grinding processing dimension, adopt special high rigidity hard alloy cutter milling fine finishining profile of tooth at present, expense is high, and working (machining) efficiency is low.
Summary of the invention
The technical problem that the present invention solved provides the finish machining method for tooth form of large modulus rack that a kind of crudy is good, cost is lower.
The technical scheme that solves the problems of the technologies described above is: finish machining method for tooth form of large modulus rack; Tooth bar after the roughing is installed on the workbench of cnc boring and milling machine; And the grinding attachment that has emery wheel is installed in the end of the ram of this cnc boring and milling machine, the relative motion through the ram in the control cnc boring and milling machine and workbench makes the certain track in emery wheel edge carry out grinding to the profile of tooth of tooth bar.
The invention has the beneficial effects as follows: thus grinding attachment is applied to cnc boring and milling machine with the tooth bar grinding such as mill at gantry through installing in the end of ram; Thereby replaced grinding machine; Expanded the range of work of universal machine tools; Solve the problem that tooth form of large modulus rack fine finishining can't grinding, effectively improved profile accuracy and the flank of tooth quality of tooth bar.The method possesses skills reliably, flexible operation, low, the economical and practical characteristics of cost easy to implement, required.Be specially adapted to the grinding of the big modulus tooth bar of single and mini-batch production.
Description of drawings
Fig. 1 is a processing sketch map of the present invention.
Fig. 2 is the sketch map on processing profile of tooth tooth inclined-plane among the present invention.
Fig. 3 is for adopting the sketch map on monodentate method feed mode processing profile of tooth tooth inclined-plane among the present invention.
Fig. 4 is for adopting the sketch map on multiple tooth method feed mode processing profile of tooth tooth inclined-plane among the present invention.
Fig. 5 for processing tooth among the present invention at the bottom of the sketch map of circular arc.
Fig. 6 is a tooth bar profile of tooth structural representation.
Be labeled as among the figure: circular arc 802, tooth bevel direction B, tooth pitch direction X, tooth depth direction Y, facewidth direction V at the bottom of circular arc 801, the right tooth at the bottom of circular arc molding emery wheel 202, ram 3, cnc boring and milling machine 4, workbench 5, tooth bar 6, left tooth inclined-plane 701, right tooth inclined-plane 702, the left tooth at the bottom of grinding attachment 1, emery wheel 2, tooth inclined-plane forming grinding wheel 201, the tooth.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation.
Finish machining method for tooth form of large modulus rack as shown in Figure 1; Tooth bar after the roughing 6 is installed on the workbench 5 of cnc boring and milling machine 4; And the grinding attachment 1 that has emery wheel 2 is installed in the end of the ram 3 of this cnc boring and milling machine 4, the relative motion through the ram 3 in the control cnc boring and milling machine 4 and workbench 5 makes emery wheel 2 carry out grinding along certain track to the profile of tooth of tooth bar 6.Grinding attachment 1 can drive emery wheel 2 rotations; Its weight preferably less than cnc boring and milling machine 4 with the weight of annex angular milling head; Mounting means can be identical with annex angular milling head; Be actually the annex angular milling head that has substituted cnc boring and milling machine 4 with grinding attachment 1 like this, therefore after on the ram 3 grinding attachment 1 being installed, realized the grinding function of cnc boring and milling machine 4.It is thus clear that; Grinding attachment 1 is applied to cnc boring and milling machine with the tooth bar grinding such as mill at gantry thereby the present invention is through installing in the end of ram 3; Expanded the range of work of universal machine tools; Solve the problem that tooth form of large modulus rack fine finishining can't grinding, effectively improved profile accuracy and the flank of tooth quality of tooth bar.
Shown in Fig. 1～2; The present invention can make emery wheel 2 carry out grinding along certain track to the profile of tooth of tooth bar 6 through the relative motion that numerical control programming is controlled between ram 3 and the workbench 5 in the cnc boring and milling machine 4 respectively at tooth pitch direction X, tooth depth direction Y and facewidth direction V, thereby guarantees working (machining) efficiency and precision.Numerical control programming can be realized emery wheel 2 multi-coordinate interlock in the space coordinates that are made up of tooth pitch direction X, tooth depth direction Y and facewidth direction V, for the feed mode of emery wheel 2 provides more more options.Wherein, between ram 3 and the workbench 5 respectively the relative motion on tooth pitch direction X and tooth depth direction Y be to realize with stretching through the traversing of ram 3.And the relative motion at facewidth direction V preferably realizes through vertically moving of workbench 5 between ram 3 and the workbench 5, can reduce the reciprocating number of times of the horizontal ram of cnc boring and milling machine like this, protects the kinematic accuracy of horizontal ram.
Embodiment
Use finish machining method for tooth form of large modulus rack processing of the present invention tooth bar profile of tooth shown in Figure 6.Each tooth of this profile of tooth by left tooth inclined-plane 701, right tooth inclined-plane 702, left tooth at the bottom of at the bottom of the circular arc 801, right tooth circular arc 802 and tooth bottom surface form.Because tooth form of large modulus rack grinding area is big, so adopt the grinding of sectional forming method.Shown in Fig. 2～4; Use earlier the left tooth inclined-plane 701 and right tooth inclined-plane 702 of tooth inclined-plane forming grinding wheel 201 according to each tooth of grinding method moulding of method of loci, at the bottom of the use tooth as shown in Figure 5 then circular arc molding emery wheel 202 according to the left tooth of each tooth of grinding method moulding of the method for forming at the bottom of circular arc 802 at the bottom of circular arc 801 and the right tooth.The left tooth inclined-plane 701 and right tooth inclined-plane 702 of elder generation's each tooth of moulding; And then at the bottom of the left tooth of each tooth of moulding at the bottom of circular arc 801 and the right tooth order of circular arc 802 can guarantee at the bottom of left tooth inclined-plane 701 and the left tooth between the circular arc 801 and the rounding off between the circular arc 802 at the bottom of right tooth inclined-plane 702 and the right tooth, be convenient to the directly control and detecting of transverse tooth thickness, tooth pitch size and precision.Above-mentioned " grinding method of method of loci " when being meant grinding tooth inclined-plane forming grinding wheel 201 have along the moving of tooth bevel direction B i.e. moving along left tooth inclined-plane 701 and right tooth inclined-plane 702 tracks.And " grinding method of the method for forming " be meant the outer rim correction of the flank shape of circular arc molding emery wheel 202 at the bottom of the tooth become the shape consistent with circular arc at the bottom of circular arc at the bottom of the left tooth 801 and the right tooth 802, then through the method for grinding of circular arc 802 at the bottom of circular arc 801 and the right tooth at the bottom of the left tooth of the reciprocating motion moulding of facewidth direction V of circular arc molding emery wheel 202 relative tooth bars 6 at the bottom of the tooth." grinding method of method of loci " and " grinding method of the method for forming " is respectively the known technology of this area.
Shown in Fig. 3～4, the left tooth inclined-plane 701 through tooth inclined-plane forming grinding wheel 201 each tooth of moulding adopts the movement locus of the feed mode control tooth inclined-plane forming grinding wheel 201 of monodentate method or multiple tooth method during with right tooth inclined-plane 702.As shown in Figure 3; Said " monodentate method " is meant left tooth inclined-plane 701 or the right tooth inclined-plane 702 of forming grinding wheel 201 elder generations in tooth inclined-plane along the tooth of direction of feed processing of tooth bevel direction B; Move the left tooth inclined-plane 701 or the right tooth inclined-plane 702 of the next tooth of distance back processing of a tooth after putting in place again along tooth pitch direction X, the left tooth inclined-plane 701 and right tooth inclined-plane 702 of the rest may be inferred each tooth of processing.As shown in Figure 4; Said " multiple tooth method " is meant and earlier tooth inclined-plane forming grinding wheel 201 is fixed on a certain tooth depth position; After being positioned at the locational left tooth of this tooth depth inclined- plane 701 or 702 grindings of right tooth inclined-plane on the tooth; Move processing on the next tooth of a tooth along tooth pitch direction X again and be positioned at the locational left tooth of this tooth depth inclined-plane 701 or right tooth inclined-plane 702 apart from the back; After with all left tooth inclined-planes 701 of this height and 702 grindings of right tooth inclined-plane, tooth inclined-plane forming grinding wheel 201 is again along tooth depth direction Y feed, and the repetition aforesaid operations machines with right tooth inclined-plane 702 until the left tooth inclined-plane 701 of each tooth.Two kinds of feed modes are mainly selected according to the size and the uniformity of heat treatment deformation situation, distortion size, flank of tooth grinding allowance before the tooth bar grinding.When tooth bar distortion is bigger, flank of tooth grinding allowance is uneven, adopts monodentate method feed mode.Less when the tooth bar distortion, flank of tooth grinding allowance is even, adopts multiple tooth method feed mode.
Because the tooth bottom surface of profile of tooth contact with gear, and its size and position are not had required precision, so can be machined directly to the position when tooth bottom surface of each tooth of tooth bar 6 carried out roughing.
Also can relate to when tooth form of large modulus rack being carried out fine finishining and the content of the method for trimming of the supply of the selection of the confirming of selected, the grinding allowance of grinding benchmark, emery wheel parameter and grinding dosage, cooling fluid, emery wheel through method for grinding; These all are the known technologies of this area, are not giving unnecessary details at this.
Claims (2)
1. finish machining method for tooth form of large modulus rack; It is characterized in that: the tooth bar after the roughing (6) is installed on the workbench (5) of cnc boring and milling machine (4); And install in the end of the ram (3) of this cnc boring and milling machine (4) have emery wheel (2) grinding attachment (1) to substitute the annex angular milling head of this cnc boring and milling machine (4); This grinding attachment (1) can drive emery wheel (2) rotation, and its mounting means is identical with this annex angular milling head; Relative motion through ram (3) in the control cnc boring and milling machine (4) and workbench (5) makes emery wheel (2) carry out grinding along certain track to the profile of tooth of tooth bar (6); Through making the certain track in emery wheel (2) edge carry out grinding in the relative motion of tooth pitch direction (X), tooth depth direction (Y) and facewidth direction (V) respectively between the ram (3) in the numerical control programming control cnc boring and milling machine (4) and the workbench (5) to the profile of tooth of tooth bar (6); Use earlier tooth inclined-plane forming grinding wheel (201) according to the grinding method of method of loci left tooth inclined-plane (701) and the right tooth inclined-plane (702) of each tooth of moulding respectively, use circular arc molding emery wheel (202) at the bottom of the tooth then according to the grinding method of method of forming circular arc (802) at the bottom of circular arc (801) and the right tooth at the bottom of the left tooth of each tooth of moulding respectively.
2. finish machining method for tooth form of large modulus rack as claimed in claim 1; It is characterized in that: when left tooth inclined-plane (701) that passes through tooth inclined-plane forming grinding wheel (201) each tooth of moulding and right tooth inclined-plane (702), adopt the movement locus of the feed mode control tooth inclined-plane forming grinding wheel (201) of monodentate method or multiple tooth method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010187152A CN101850446B (en) | 2010-05-31 | 2010-05-31 | Finish machining method for tooth form of large modulus rack |
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| CN201010187152A CN101850446B (en) | 2010-05-31 | 2010-05-31 | Finish machining method for tooth form of large modulus rack |
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| CN101850446A CN101850446A (en) | 2010-10-06 |
| CN101850446B true CN101850446B (en) | 2012-10-10 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480919B (en) * | 2013-09-24 | 2015-09-23 | 二重集团（德阳）重型装备股份有限公司 | Large modulus Hardened gear face tooth bar profile of tooth method for fine finishing |
| CN104353907A (en) * | 2014-12-03 | 2015-02-18 | 成都宏明双新科技股份有限公司 | Machining method of insert gear |
| CN107081487A (en) * | 2017-04-25 | 2017-08-22 | 谭清平 | It is a kind of can two-sided polishing and preventing wear and tear the gear grinder on groove top |
| CN107378136A (en) * | 2017-07-18 | 2017-11-24 | 二重集团（德阳）重型装备股份有限公司 | The open processing method of large modulus major diameter straight bevel gear teeth portion |
| CN110102831B (en) * | 2019-04-28 | 2020-08-11 | 中信重工机械股份有限公司 | Tooth profile processing method of large-modulus rack with tooth surface induction quenching |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB538263A (en) * | 1938-09-01 | 1941-07-28 | Hermann Kolb | Improvements in and relating to the grinding of the teeth flanks of spur wheels |
| CN1169647C (en) * | 2002-03-19 | 2004-10-06 | 北京航空航天大学 | Numerically controlled tooth grinding machine driven by linear servo motor |
| CN2700036Y (en) * | 2004-05-13 | 2005-05-18 | 宝鸡虢西磨棱机厂 | Toothed rack edge-grinding and chamfering machine |
| CN101011787A (en) * | 2007-01-31 | 2007-08-08 | 黄开元 | Processing method and apparatus for rack |
| CN201040328Y (en) * | 2007-01-31 | 2008-03-26 | 黄开元 | Rack processing device |
| CN201300260Y (en) * | 2008-12-11 | 2009-09-02 | 上海重型机床厂有限公司 | High-precision numerical control rack grinding machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4202306B2 (en) * | 2004-07-29 | 2008-12-24 | 三菱重工業株式会社 | Gear grinding machine |
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2010
- 2010-05-31 CN CN201010187152A patent/CN101850446B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB538263A (en) * | 1938-09-01 | 1941-07-28 | Hermann Kolb | Improvements in and relating to the grinding of the teeth flanks of spur wheels |
| CN1169647C (en) * | 2002-03-19 | 2004-10-06 | 北京航空航天大学 | Numerically controlled tooth grinding machine driven by linear servo motor |
| CN2700036Y (en) * | 2004-05-13 | 2005-05-18 | 宝鸡虢西磨棱机厂 | Toothed rack edge-grinding and chamfering machine |
| CN101011787A (en) * | 2007-01-31 | 2007-08-08 | 黄开元 | Processing method and apparatus for rack |
| CN201040328Y (en) * | 2007-01-31 | 2008-03-26 | 黄开元 | Rack processing device |
| CN201300260Y (en) * | 2008-12-11 | 2009-09-02 | 上海重型机床厂有限公司 | High-precision numerical control rack grinding machine |
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Effective date of registration: 20180314 Address after: 618013 Deyang Pearl River West Road, Sichuan, No. 460 Patentee after: Double (Deyang) heavy equipment Co., Ltd. Address before: 618013 Deyang Pearl River West Road, Sichuan, No. 460 Patentee before: Erzhong Group (Deyang) Heavy Equipment Co., Ltd. |