EP3068579A1 - Outil de rodage et procédé pour usiner plusieurs trous coaxiaux - Google Patents

Outil de rodage et procédé pour usiner plusieurs trous coaxiaux

Info

Publication number
EP3068579A1
EP3068579A1 EP14796507.3A EP14796507A EP3068579A1 EP 3068579 A1 EP3068579 A1 EP 3068579A1 EP 14796507 A EP14796507 A EP 14796507A EP 3068579 A1 EP3068579 A1 EP 3068579A1
Authority
EP
European Patent Office
Prior art keywords
cutting
honing tool
honing
group
groups
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14796507.3A
Other languages
German (de)
English (en)
Other versions
EP3068579B1 (fr
Inventor
Erwin Baumgartner
Michael Rach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gehring Technologies GmbH and Co KG
Original Assignee
Gehring Technologies GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gehring Technologies GmbH and Co KG filed Critical Gehring Technologies GmbH and Co KG
Publication of EP3068579A1 publication Critical patent/EP3068579A1/fr
Application granted granted Critical
Publication of EP3068579B1 publication Critical patent/EP3068579B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/08—Honing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/08—Honing tools
    • B24B33/083—Honing tools with different sets of honing stones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/06—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/40—Single-purpose machines or devices for grinding tubes internally

Definitions

  • the present invention relates to a honing tool for machining a plurality of coaxially successively arranged holes according to the preamble of claim 1. Furthermore, the invention relates to a method for processing a plurality of coaxially successively arranged holes by a honing tool according to the preamble of claim 9 and a control unit of a Honing machine according to the preamble of claim 13.
  • Honing is a versatile machining process with the help of which, among other things, the dimensional and position accuracy of cylindrical bores is improved.
  • the bearing seats are also referred to as bores or as bore sections. It is referred to as a through hole, a cylindrical bore with a constant diameter; Examples of these are the bores 17a and 17b in FIG. 5.
  • a cylindrical bore with a shoulder and consequently a diameter jump is referred to as a stepped bore; an example of this is the holes 17c and the associated paragraph 17d in Figure 5.
  • the axial distance of the individual bearing seats is often greater than their diameter. Therefore, the bore portions can only be machined by a relatively slender and long tool. These geometric boundary conditions make it difficult to achieve a good dimensional and positional accuracy of the bearing seats.
  • DE 196 34 415 A1 shows a tool for machining main bearing bores in crankcases with an upper and lower guide region, which are adjustable to different diameters. Between the guide areas is a cutting area, are arranged in the deliverable strips with cutting pad. A lower guide area is set to the extent of the pre-machining of the bore, an upper guide area is adjusted so that it rests against the previously machined bore.
  • This tool is designed for machining through holes with a uniform diameter. It can thus be edited no stepped holes.
  • DE 44 39 381 Al shows a tool for processing individual bearing webs, each with a bearing seat of the crankshaft bearing of an internal combustion engine.
  • a first, upper bearing web has a larger diameter than the bearing webs arranged underneath.
  • the tool is step-shaped, wherein the corresponding cutting edge groups are arranged axially one behind the other and adapted to the diameter of the holes. This allows coaxial machining of lower, lower holes and upper, larger holes. All holes of the individual bearing webs must be designed as a through hole.
  • the object of the present invention is to provide a honing tool which is more versatile in comparison with the known honing tools.
  • the cutting strip groups are designed and arranged such that a through bore can be machined during a single operation by at least one first cutting strip group and a stepped bore in at least one second cutting strip group can be processed in one clamping and without tool change.
  • the cutting strip groups must be arranged on the honing tool such that they are matched to the position of the individual holes.
  • the cutting bar groups have at least one cutting bar.
  • a second tool which is designed for machining one or more stepped bores within a series concentric bores.
  • This second tool is centered in at least one, but preferably a plurality of through holes of the storage lane, so that the stepped bore has a very good coaxiality with the through holes at the latest after honing.
  • the through-hole and the stepped bore are then possible for the through-hole and the stepped bore to be processed in a single operation.
  • a single operation is understood in the present application, the introduction of the honing tool in the bore or the storage lane, the processing of all holes provided and the withdrawal of the honing tool.
  • the method according to the invention can be carried out on a standard honing machine which is designed, for example, with a conventional double delivery system and can automatically set the cutting speeds and radial delivery positions for different honing methods (for example honing honing and conventional honing).
  • the method can be implemented on the control unit of the honing machine or in a specially set up for this task controller.
  • the honing tool according to the invention and the method according to the invention allow the machining of through holes arranged coaxially with one another and stepped bores of different diameters in one or, if desired, in two operations, so that a tool change or a transport of the workpiece to a further processing station can be dispensed with.
  • the processing time can be minimized.
  • the cost of the bore machining is low, since only a standard honing machine and / or the honing tool (s) according to the invention are required.
  • the cross sections of the coaxially successively arranged cutting strip groups are formed with increasing distance from a tool receiving device either the same size or smaller. This allows insertion of the honing tool into the holes.
  • At least one bore is machined by friction honing. This means that under rotation with very few strokes, e.g. a double stroke, the honing process is performed. During the downstroke nearly the entire material removal takes place; the upstroke serves to smoothen the previously processed surface.
  • At least one bore is processed by oscillating honing.
  • Oscillating honing is understood to mean conventional honing, ie the rotation of the honing tool with simultaneous oscillating strokes.
  • the cutting edge groups provided for the honing honing must not be in engagement with the associated bores, so that they or the bores are not impaired or damaged.
  • a Zentrierangnange in the axial direction to the free end of the honing tool at at least one cutting edge group directly a Zentrieroaranange is arranged.
  • the Zentrierangnange preferably has at least three centering, which stabilize the honing tool in its position in the individual processing phases and lead in the workpiece.
  • the Zentrierangn concept also serve, especially at the beginning of processing, to align the honing tool in the holes.
  • the centering strips are preferably not radially adjustable. But you could also be designed adjustable.
  • the guide rails serve to center the honing tool before and / or during processing by one or more cutting bar groups, to stabilize and / or to avoid vibrations when, for example, a cutting bar group processes a bore.
  • the centering strips are usually arranged in the immediate vicinity of a group of cutting strips. This ensures that during processing both the cutting strips of the cutting edge group and the centering of the Zentrierangneau are located in the hole and thus the centered position of the honing tool is always guaranteed.
  • a guide rail group is arranged in the axial direction opposite to the free end of the honing tool on at least one cutting edge group.
  • the honing tool has an air measuring device. This can be monitored during processing in particular the conventional honing.
  • Figure 1 is an inventive honing tool in a perspective view
  • Figure 2 is a longitudinal section through the honing tool of Figure 1;
  • FIG. 3 shows a longitudinal section through the honing tool of FIG. 1 in a modified sectional plane
  • FIG. 4 a shows a cross-section A-A from FIG. 2;
  • FIG. 4b shows a cross-section B-B from FIG. 2;
  • FIG. 4c shows a cross section C-C from FIG. 2;
  • FIG. 5 shows the honing tool from FIG. 1 in four different process states
  • FIGS. 6 and 7 a compilation of two inventive honing tools.
  • FIG. 1 shows an embodiment of a honing tool 31 according to the invention in a perspective view in detail.
  • the illustrated honing tool 31 is specifically designed to process the bores 17 (see FIG. 5). For holes with other geometries, the honing tool 31 must be adjusted accordingly.
  • the honing tool 31 comprises a tool body 1 and a receptacle 2, via which the honing tool 31 can be coupled in a flange manner to a spindle (not shown) of a commercially available honing machine.
  • connection of the honing tool 31 with the spindle can for example be done by a double-articulated (gimbal) drive rod.
  • a rigid connection between the honing tool 31 and the spindle is possible.
  • the gimbal connection to the spindle is preferred.
  • the rigid connection is preferred.
  • the honing machine may, for example, be designed with a conventional double delivery system, whereby the cutting speeds and radial delivery positions for different honing methods (e.g., honing honing and conventional honing) may be automatically controlled.
  • honing honing and conventional honing may be automatically controlled.
  • the honing process is performed with very few strokes, e.g. a double stroke, performed.
  • the downstroke nearly the entire material removal takes place; the upstroke serves to smoothen the previously processed surface.
  • honing is performed by rotating the honing tool 31 with multiple repetitions.
  • three cutting blade groups 3, 4, 5 arranged separately on the honing tool 31 are provided.
  • the cutter bar group 3 is provided for machining the bore 17a
  • the cutter bar group 4 is provided for machining the bore 17b
  • the cutter bar group 5 is provided for machining the bore 17c.
  • the number of holes with the associated cutting edge groups is arbitrary and in the figures 1 to 4 assumed by way of example.
  • Each cutter bar group 3, 4, 5 has for editing the holes 17 on the circumference arranged cutting strips 18.
  • the honing tool 31 also has two Zentrierance 7 and 9, which are preferably arranged in the direction of the free end of the honing tool 31 immediately adjacent to the cutter bar group 3 and 5.
  • the Zentrierance 7, 9 are used, in particular at the beginning of processing to align the honing tool 31 in the holes 17.
  • Centering bar groups can also be arranged in the area of other cutting bar groups or in the area of all cutting bar groups.
  • the Zentrier instrumentalnopathy 7, 9 comprise a plurality of centering strips 19, which are preferably distributed uniformly over the circumference of the honing tool 31 in a plan view of the honing tool 31.
  • the centering strips 19 do not perform cutting, but serve to guide and center the honing tool 31 in the bore to be machined; they are not radially adjustable. But you could also be designed adjustable.
  • the honing tool 31 also has, approximately in the middle and at its end facing the spindle of the honing machine, two guide bar groups 6 and 8, which are preferably arranged directly adjacent to the cutting bar groups 3 and 5.
  • the guide bar groups 6, 8 serve to stabilize and center the honing tool 31 when the cutting bar group 4 is active.
  • the holes 17a and 17c are through-holes, then they can be processed by Reibhonen. Because, in the example shown, the bore 17b is a stepped bore with an undercut 17d, the bore 17b is machined by conventional honing.
  • guide bar groups can also be arranged in the area of other cutting bar groups.
  • the guide rail groups 6, 8 have a plurality of guide rails 20, which are distributed in a plan view of the honing tool 31 regularly over the circumference of the honing tool 31.
  • the guide rails 20 are not radially adjustable. But you could also be designed adjustable.
  • FIG. 2 shows the honing tool 31 in a longitudinal section.
  • the various cutting edge groups are delivered.
  • FIG. 2 shows a first delivery system.
  • a feed tube 10 actuates two groups of Zustellkonussen 11, which move the cutting bars 18 of the first cutting bar group 3 and the cutting bars 18 of the second cutting bar group 4 together radially outward.
  • the cutting strips 18 of the cutting strip group 3 has two spaced-apart conical feed surfaces 21 which cooperate with the Zustellkonussen 11.
  • the cutting strips 18 of the cutter bar group 4 have two spaced-apart conical feed surfaces 22 which cooperate with the Zustellkonussen 11.
  • Each cutting bar 18 of the cutting bar groups 3, 4 is thus supported twice, so that the feed force of the feed tube 10 acts on the cutting bars 18 at both ends.
  • a feed rod 12 is guided. It is connected to the delivery cones 13.
  • the Zustellkonusse 13 act on two spaced conical feed surfaces 23 of the cutting bars 18 of the cutting bar group 5. These cutting bars are thus supported twice.
  • a guide 14 is disposed below the Zustellkonusse 13, which guides the Zustellkonusse 13 centrally in the interior of the tool body 1 and stabilized.
  • a closure cap 15 is arranged, against which a return spring 16 rests in the interior of the tool body 1. The transmitted by the Zustellstange 12 feed force and feed movement of the Zustellkonusse 13 must overcome the force of the return spring 16.
  • the cutting bars 18 of the cutting bar groups 3 and 4 are delivered together with the aid of the delivery tube 10.
  • the cutting strips 18 of the cutting bar group 5 are delivered separately by means of the Zustellstange 12.
  • the diameter of the holes 17 a and 17 b can be set independently.
  • the diameters of the bores 17a, 17b and 17c can be adjusted independently of one another, although only two feed devices 10, 12 are present.
  • the honing tool 31 is simpler and less expensive in construction and makes less demands on the honing machine; In particular, it allows the use of a honing machine with two feeders.
  • FIG. 3 shows the honing tool 31 in a sectional plane changed with respect to FIG.
  • FIG. 4a shows a section through the honing tool 31 along the line AA (see FIG. 2) in the region of the cutting strip group 3
  • FIG. 4b shows a section along the line BB (see FIG. 2)
  • FIG. 4c shows a section along the line CC (see FIG FIG. 2) in the area of the cutting bar group 5.
  • FIGs 4a and 4b show in the center of the honing tool 31, the feed rod 12 and the feed cone 11.
  • the cutting bars 18 are evenly distributed over the circumference of the feed rod 12.
  • FIG. 4b illustrates the components of the honing tool 31 required for the delivery of the second cutting bar group 4.
  • the cutting bars 18 of the second cutting bar group 4 process the stepped bore 17b (see FIG. 5).
  • FIG. 4c shows in the center a feed cone 13 for the delivery of the cutting bars 18 of the cutting bar group 5.
  • FIG. 5 shows the honing tool 31 in four different process states.
  • the holes 17a and 17c are in the example shown through holes and are to be processed by Reibhonen.
  • the bore 17b is formed as a stepped bore, which is to be processed by conventional honing (oscillating honing).
  • FIG. 5a shows the honing tool 31 retracted into the bores 17a, 17b and 17c, which is axially aligned by the centering strip group 7 in the bore 17a and by the centering strip group 9 in the bore 17c.
  • the axial distance of the cutting edge groups 3 and 5 of the Zentrierangnopathy 7 and 9 are each chosen so that there is a short-term coverage and thus both the cutting edge groups 3, 5 and the Zentrierangn distr 7, 9 are in the bore 17 a and 17 c and the centered position is preserved.
  • the axial distance of the cutting bar group 3 from the Zentrierraunxx 7 is smaller than the axial extent of the bore 17a to be machined so that the cutting bars 18 of the cutting bar group 3 dive into the bore 17 a before the Zentrierangnange 7 leave the hole 17 a, if the Hone tool 31 deeper into the bore 17 dips.
  • the honing tool 31 is centered by the Zentrierologicalnopathy 7 and 9 in the holes 17 a and 17 c. Subsequently, the honing tool 31 dips further into the holes 17 and brings the cutting bars 18 of the cutting strip groups 3 and 5 in engagement with the holes 17 a and 17 c to be machined. The holes 17 a and 17 c are therefore finished simultaneously by Reibhonen.
  • the cutter bar groups 3 and 5 are preferably designed for Reibhonen with one or a few slow strokes. Friction honing is an established honing technique in which the cutting bars are moved in an axial movement through the bore to be machined, similar to a reamer.
  • FIG. 5b shows the position of the cutting bar group 3 and 5 at the end of the honing machining of the bores 17a and 17c.
  • the guide bar groups 6 and 8 dip into the previously friction-honed bores 17a and 17c, whereby the guided tool position remains unchanged in the finished bores 17a and 17c.
  • the guide block groups 6 and 8 are set to the lowest possible undersize to the previously honed hole 17a and 17c, so that a play-free guidance of the honing tool 31 for the subsequent further processing of the central bore 17b is ensured at the same time low friction.
  • FIG. 5c shows the machining of the bore 17b, which is designed as a stepped bore and therefore can not be finished by friction honing.
  • the bore 17b is therefore machined from the cutting bar group 4 by conventional honing.
  • the cutter bar group 4 oscillates axially in the bore 17b.
  • the honing tool 31 rotates.
  • FIG. 5c shows the cutting bar group 4 in the upper end position of the oscillating stroke movement.
  • FIG. 5d shows the cutting bar group 4 in the lower end position of the oscillating stroke movement.
  • the honing tool 31 is always guided by the guide block group 6 and 8 in the other two holes 17a and 17c, whereby a coaxial machining of the bore 17b is ensured to the holes 17a and 17c.
  • the machining of the bore 17b thus differs from the machining of the bores 17a and 17c (honing honing).
  • the bores 17a and 17b can also be machined by friction honing, in which case the bore 17c can then be conventionally honed with an oscillating tool. It is also possible that the holes 17b and 17c are processed by Reibhonen and the bore 17a is honed conventionally oscillating.
  • the number of holes to be machined may also differ from the example shown, so that either only two or more than three holes can be processed in one operation.
  • at least one bore can be machined by friction honing and at least one bore by conventional honing.
  • the first honing tool 31.1 also has two Zentrierance 7 and 9, which are preferably arranged in the direction of the free end of the honing tool 31.1 immediately adjacent to the cutter bar group 3 and 5. It could also be arranged in the range of other cutting bar groups or in the range of all cutting bar groups Zentrierangn phenomenon.
  • the Zentrier instrumentalnopathy 7, 9 comprise a plurality of centering strips 19, which are preferably distributed uniformly over the circumference of the honing tool 31 in a plan view of the honing tool 31.
  • the centering strips 19 do not perform cutting, but serve to guide and center the tool 31 in the bore to be machined; they are not radially adjustable. But you could also be designed adjustable.
  • Figure 6 shows the first honing tool 31.1 in a perspective view in detail.
  • the first honing tool 31.1 is specially adapted to the machining of the holes 17 a and c. For holes with other geometries, the first honing tool 31.1 must be adjusted accordingly.
  • the first honing tool 31.1 and the second honing tool 31.2 has very many similarities with the honing tool 31 according to FIGS. 1 to 4, so that only the essential differences are briefly explained below.
  • two separately arranged cutting strip groups 3 and 5 are provided on the first honing tool 31.1.
  • the cutter bar group 3 is provided for machining the bore 17a
  • the cutter bar group 5 is provided for machining the bore 17c.
  • FIG. 7 shows an embodiment of a second honing tool according to the invention 31.2 in a perspective view in detail.
  • the illustrated second honing tool 31.2 is specifically designed for machining the bore 17b (see FIG. 5).
  • a cutting strip group 4 is provided on the second honing tool 31.2.
  • the second honing tool 31.2 also has, approximately in the middle and at its end facing the spindle of the honing machine, two guide bar groups 6 and 8.
  • the guide bar groups 6, 8 serve to stabilize and center the tool 1 when the cutting bar group 4 is active. This is the case, for example, when machining the bore 17b (see FIG. 5) with the cutting edge group 4 without simultaneously machining the other bores 17a and 17c.
  • guide bar groups can also be arranged in the area of other cutting bar groups.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

La présente invention concerne un outil de rodage (31) pour usiner plusieurs trous séparés, coaxiaux, disposés les uns derrière les autres (17a, 17b, 17c) présentant des diamètres différents. L'outil de rodage (31) comprend plusieurs groupes de lames de coupe (3, 4, 5) disposés de manière coaxiale les uns derrière les autres, une section d'un groupe de lames de coupe (3, 4, 5) formée par des lames de coupe pouvant être déployées radialement (18) s'écartant de la section d'au moins un autre groupe de lames de coupe (3, 4, 5). Les groupes de lames de coupe (3, 4, 5) sont réalisés et disposés de manière telle que pendant un seul cycle de travail, au moins un premier groupe de lames de coupe (3, 5) peut usiner un trou débouchant (17a, 17c) et au moins un deuxième groupe de lames de coupe (4) peut usiner un perçage étagé (17b).
EP14796507.3A 2013-11-15 2014-11-12 Outil de rodage et procédé pour usiner plusieurs trous coaxiaux Active EP3068579B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013223293.4A DE102013223293A1 (de) 2013-11-15 2013-11-15 Honwerkzeug und Verfahren zum Bearbeiten mehrerer koaxialer Bohrungen
PCT/EP2014/074347 WO2015071294A1 (fr) 2013-11-15 2014-11-12 Outil de rodage et procédé pour usiner plusieurs trous coaxiaux

Publications (2)

Publication Number Publication Date
EP3068579A1 true EP3068579A1 (fr) 2016-09-21
EP3068579B1 EP3068579B1 (fr) 2017-09-06

Family

ID=51894046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14796507.3A Active EP3068579B1 (fr) 2013-11-15 2014-11-12 Outil de rodage et procédé pour usiner plusieurs trous coaxiaux

Country Status (7)

Country Link
US (1) US10086491B2 (fr)
EP (1) EP3068579B1 (fr)
CN (1) CN105792986B (fr)
DE (1) DE102013223293A1 (fr)
HU (1) HUE035565T2 (fr)
MX (1) MX2016006196A (fr)
WO (1) WO2015071294A1 (fr)

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CN106312787A (zh) * 2015-06-16 2017-01-11 徐工集团工程机械股份有限公司 珩磨刀具以及加工中心
DE102015221714A1 (de) * 2015-11-05 2017-05-11 Gehring Technologies Gmbh Verfahren und Vorrichtung zur Herstellung nicht zylindrischer Bohrungen mit mindestens einer Aussparung durch Honen
DE102017117069B4 (de) * 2017-07-27 2022-07-14 Gehring Technologies Gmbh + Co. Kg Honwerkzeug und Verfahren zur Honbearbeitung
CN107498407A (zh) * 2017-09-20 2017-12-22 张家港市圣鼎源制管有限公司 一种内圆磨床
DE102017122893B4 (de) * 2017-10-02 2024-05-16 Gehring Technologies Gmbh + Co. Kg Verfahren zur Honbearbeitung eines Stators und Maschine zur Durchführung des Verfahrens
CN107931723A (zh) * 2017-12-12 2018-04-20 苏州信能精密机械有限公司 一种阶梯孔珩磨铰刀
CN113370070B (zh) * 2020-02-25 2022-12-02 中国石油天然气股份有限公司 一种泵筒珩磨工具
CN112692651A (zh) * 2020-12-30 2021-04-23 綦江齿轮传动有限公司 一种防止小长径比零件跳动的磨削加工方法
CN112757064B (zh) * 2020-12-31 2023-03-07 綦江齿轮传动有限公司 磨床传动机构
CN115741346B (zh) * 2022-11-16 2024-04-12 无锡恒信北石科技有限公司 一种泵体研磨装置及工艺

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EP3068579B1 (fr) 2017-09-06
CN105792986A (zh) 2016-07-20
WO2015071294A1 (fr) 2015-05-21
HUE035565T2 (en) 2018-05-28
US10086491B2 (en) 2018-10-02
MX2016006196A (es) 2016-09-13
CN105792986B (zh) 2018-07-10
DE102013223293A1 (de) 2015-05-21
US20160354893A1 (en) 2016-12-08

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