CN202528009U - Datum deviation compensation type processing system for box body or shell part - Google Patents

Datum deviation compensation type processing system for box body or shell part Download PDF

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Publication number
CN202528009U
CN202528009U CN2012200614071U CN201220061407U CN202528009U CN 202528009 U CN202528009 U CN 202528009U CN 2012200614071 U CN2012200614071 U CN 2012200614071U CN 201220061407 U CN201220061407 U CN 201220061407U CN 202528009 U CN202528009 U CN 202528009U
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China
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zero point
processing
engine cylinder
shell
coordinate
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CN2012200614071U
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Chinese (zh)
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孔伟武
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Beijing Foton Cummins Engine Co Ltd
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Beijing Foton Cummins Engine Co Ltd
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Abstract

The utility model relates to a datum deviation compensation type processing system for a box body or a shell part. A main positioning datum and a transition datum are formed on the box body or the shell part, wherein the processing system comprises numerical control processing equipment (5) and a detection device (4) for detecting actually measured distance values of a transition datum zero point (WZP1) in a machine coordinate system of the numerical control processing equipment in the X-axis, Y-axis and Z-axis directions relative to a main positioning datum zero point (WZP2); and a detection signal can be transmitted to a numerical control unit of the numerical control processing equipment (5) by the detection device (4). According to the utility model, by compensating the actual deviation between the transition datum and the main positioning datum, an error of datum noncoincidence generated due to the nonuniform datums in the machining process of the box body or the shell part is eliminated, so that the processing quality of the box body or the shell part is improved.

Description

The compensation system of processing of datum drift that is used for casing or shell part
Technical field
The utility model relates to the system of processing of a kind of casing or shell part, particularly, relates to the compensation system of processing of datum drift that is used for casing or shell part in a kind of casing or the shell part process.
Background technology
In machining, often need machining box or shell part; For example engine cylinder-body, engine cylinder cover, oil sump, crankcase, gear hub etc.; The processing of these parts generally has a general main positioning reference; In process, should adopt main positioning reference that casing or shell part are positioned clamping as much as possible,, reduce mismachining tolerance so that the positioning reference in the machining process keeps unified.But; In casing or shell part process, can occur some structures to be processed inevitably and be not suitable for the situation that adopts main positioning reference to position; Structure for example to be processed need be formed on the main location basal plane of main positioning reference, and often need adopt the transition positioning reference to position clamping this moment.In order to say something, below mainly describe with the example that is processed as of engine cylinder-body.
Engine cylinder-body is formed with a plurality of installed surfaces and installing hole as the main installation carrier of engine component on it.Engine cylinder-body relates to the processing technology of relative complex in process, work flow roughly is following: processing → cylinder hole heavy boring, the honing processing → finish-milling top plane → finished product of plane, roughing top, bottom surface → fine finishining positioning reference (being bottom surface, two dowel holes) → thick fine finishining front and rear end → boring first time cylinder hole, the hole of milling watt seat two sides etc. → each deep hole machining → six faces of boring second time cylinder hole → cylinder body, boss etc.Known ground; In the process of engine cylinder-body, follow six point location principles, ideally, it should adopt one side two pins to position; Promptly should utilize two alignment pins on cylinder body bottom surface (oil sump installed surface) and the bottom surface as main positioning reference; Accomplish most of roughing operation and whole finishing steps of cylinder body, this localization method has guaranteed theoretic six point location principles, and promptly plane 3 points, straight pin 2 points, rhombus pin are a bit.
But, the work flow of above-mentioned engine cylinder-body, can there be variation in different production producer according to the production practices situation of self.At large; Because the engine production producer of specialty has the outside cooperation producer of self mostly; The part manufacturing procedure (especially roughing operation) of engine cylinder-body is usually accomplished by outside cooperation producer, and this feasible most of roughing operation of accomplishing cylinder body through main positioning reference has difficulties with whole finishing steps.
Particularly; For example; The applicant has two engine cylinder-body production lines at present; Every engine line all adopts machining center (the Star500 type horizontal Machining centers of for example German Cross Huller company, it is four-axle linked design, versatility is stronger) and special purpose machine tool to carry out combinations produce.Machining center is responsible for the roughing of some underloadings, and like drilling and tapping etc., special purpose machine tool is responsible for the processing of key position, like the semifinishing and the fine finishining at positions such as bent axle, cylinder hole, end face.Wherein, the heavily loaded roughing of engine cylinder-body is all carried out the processing of outer committee by external coordination producer, like the roughing of cylinder hole, crankshaft hole and open grade face roughing etc.For fear of the benchmark transformed error; The main project of outer committee adds man-hour used positioning reference and is mainly the main positioning reference of known engine cylinder-body processing; Be two dowel holes on cylinder body bottom surface (being the oil sump installed surface) and the bottom surface, thereby two dowel holes on cylinder body bottom surface and the bottom surface also need the processing of outer committee.But; Engine cylinder-body bottom is except bottom surface and dowel hole need be processed; Also usually need process atomizer installing hole, oilhole etc.; After external collaboration producer sent to the cylinder body semi-finished product, the hole on these cylinder body bottom surfaces need be processed through machining center by the applicant voluntarily, and this must relate to engine cylinder-body work in-process positioning and clamping in the heart; Owing to need the hole of processing to be positioned on the bottom surface of engine cylinder-body, therefore when these projects of processing, just be difficult to adopt the main positioning reference of above-mentioned normal " one side two pins ".
For addressing the above problem; The general practice is on other side on the engine cylinder-body, to form a transition baseline; For example on the exhaust side side of engine cylinder-body, form false boss as the location basal plane; Position with this transition baseline then, process the project of engine cylinder-body bottom, for example oilhole etc.Under this situation, owing in fact adopt transition baseline to position, the unactual positioning action that plays of the main positioning reference that forms on the cylinder body (i.e. " plane and two pits ").
Particularly; Suitably referring to shown in Figure 1; For example work in-process adds man-hour in the heart; Engine cylinder-body clamps through anchor clamps location as the actual location benchmark with transition baseline, and the transition baseline that constitutes the basal plane formation of transition baseline on the setting element on the anchor clamps and the engine cylinder-body is expressed as WZP1 zero point, and lathe coordinate system is expressed as MZP zero point.Work in-process heart B axle (being rotatable platform) corner is 180 when spending, and workpiece bottom is towards machine tool chief axis, suppose this moment WZP1 on lathe X, Y, three directions of Z with respect to the distance of lathe coordinate system MZP at zero point be respectively 212.5mm, 380mm ,-83mm.Under this situation, to suppose and need on the cylinder body bottom surface, bore a hole, the hole number is H6001, and this hole is respectively-255.5mm, 235mm apart from transition baseline WZP1 at zero point on X, Y both direction, and the aperture is 383mm in the distance of Z direction distance W ZP1.At this moment; The conventional machining process that work in-process is processed in the heart is specific as follows; Provided the procedure that machining center adopts for help understanding, wherein to adopt general Simens (Siemens) digital control system (be that the note of specific procedure statement is spoken behind the branch in the following procedure to machining center to those skilled in the art knownly; Only help to read debugging routine, do not carry out for machining center):
The first, the coordinate system when machining hole H6001 is set is displaced to transition baseline WZP1 at zero point by lathe MZP at zero point with coordinate zero point.
$P_UIFR [1, X, TR]=212.5; WZP1 and MZP differ 212.5mm at directions X
$P_UIFR [1, Y, TR]=380; WZP1 and MZP differ 380mm in the Y direction
$P_UIFR [1, Z, TR]=-83; WZP1 and MZP differ 83mm in the Z direction
$P_UIFR [1, B, TR]=0; WZP1 is consistent with MZP B shaft angle degree
The second, call the coordinate system that sets with G54, and under this coordinate system machining programming.
G0 G54X-255.5 Y235M3D1; Main shaft moves on to the position of X-255.5 Y235 fast
G0 Z=383+3; Main shaft moves on to the position of the 3mm from the aperture fast along the Z axle
G1 Z=383-10; Boring, hole depth 10mm
G0 Z600; The Z axle falls back on home fast
Can find out through conventional machining process; This traditional processing technology and system of processing thereof are in the processing to above-mentioned cylinder body; The actual location benchmark that adopts is a transition baseline, also is transition baseline zero point of forming with this transition baseline in process as workpiece coordinate system zero point.But; As stated; The main roughing operation of engine cylinder-body and whole finishing step should adopt main positioning reference to process as positioning reference; Said main positioning reference is generally selected according to the design basis of engine cylinder-body, and therefore said main positioning reference can be similar to the design basis of thinking engine cylinder-body, and transition baseline only is the interim benchmark that adopts for ease of processing in the process.Known ground; In mechanical processing process; Should follow unifying datum and datum coincidence principle, should unify to adopt main positioning reference (promptly above-mentioned " one side two pins ") in the engine cylinder-body process as far as possible as the processing positioning reference, with the error of avoiding adopting different positioning references to bring.Adopting under the situation of above-mentioned transition baseline as positioning reference; Because the mismachining tolerance of transition baseline, the clamping error when adopting transition baseline to position; Will inevitably cause having deviation between transition baseline and the main positioning reference, promptly produce not coincidence error of so-called benchmark, this can have influence on the machining accuracy of the relevant processing project of engine cylinder-body bottom surface; Thereby cause the machining accuracy of engine cylinder-body not high, when serious even cause engine cylinder-body to become waste product.
Defective in the above-mentioned machining process is prevalent in the process of casing or shell part, and is not limited to above-mentioned engine cylinder-body.In view of this, need a kind of system of processing that is used for casing or shell part of design, to overcome the above-mentioned defective of prior art through novel processing mode.
The utility model content
The technical problem that the utility model also will solve provides a kind of compensation system of processing of datum drift that is used for casing or shell part; This system of processing can compensate the mismachining tolerance that produces because of the benchmark disunity effectively under the situation that adopts transition baseline as casing or shell part processing positioning reference, thereby improves the machining accuracy of casing or shell part.
In order to solve the problems of the technologies described above; The utility model provides a kind of compensation system of processing of datum drift that is used for casing or shell part; Be formed with main positioning reference and transition baseline on said casing or the shell part; Wherein, Said system of processing comprise numerically controlled processing equipment be used for detecting transition baseline zero point with respect to main positioning reference zero point at the lathe coordinate system of said numerically controlled processing equipment checkout gear along the measured distance value of X axle, Y axle and Z-direction, this checkout gear can be transferred to detection signal the numerical control unit of said numerically controlled processing equipment.
Preferably; Said numerically controlled processing equipment is a horizontal Machining centers; Said checkout gear is the contact measuring head that is used to be installed on the machine tool chief axis of said horizontal Machining centers, and this contact measuring head can radio to detection signal the numerical control unit of said numerically controlled processing equipment.
Pass through technique scheme; The compensation system of processing of the datum drift that is used for casing or shell part of the utility model can be through measuring the main positioning reference of casing or shell part; Find out main positioning reference zero point and the transition baseline position deviation of zero point on the X/Y/Z direction of principal axis; Then with this position deviation compensation transition baseline each coordinate figure at zero point, thereby form transition baseline zero point of revising as workpiece coordinate system zero point.Can reduce effectively like this benchmark not coincidence error to the influence of machining accuracy.That is to say; Although the system of processing through the utility model has adopted transition baseline as casing or shell part; Especially the positioning reference of engine cylinder-body; But because this system of processing can compensate the actual deviation between transition baseline and the main positioning reference dexterously through operation in process; Therefore can there be deviation in the casing of the system of processing processing through the utility model or the dependency structure of shell part basically with respect to main positioning reference, that is to say, although the utility model has adopted transition baseline as positioning reference; But can not produce the error that benchmark does not overlap, thereby improve the crudy of casing or shell part (for example engine cylinder-body) because of the benchmark disunity.For example, two engine cylinder-body production lines of applicant have all passed through the trial-production examination at present, and its working ability and crudy meet design standard fully.
Other feature and advantage of the utility model will partly specify in the specific embodiment subsequently.
Description of drawings
Attached drawings is used to provide the further understanding to the utility model; And constitute the part of specification; It is used to explain the utility model with the following specific embodiment, but the protection domain of the utility model is not limited to the following accompanying drawing and the specific embodiment.In the accompanying drawings:
Fig. 1 is the work flow step block diagram that carries out engine cylinder-body processing of the compensation system of processing of datum drift that is used for engine cylinder-body of the utility model specific embodiment, has only simply described the main points of each step among the figure in the square frame.
The schematic top plan view that Fig. 2 is the engine cylinder-body positioning and clamping to the machining center rotary table, display size only is the illustration size of carrying out for purpose of explanation among the figure.
Fig. 3 is that the engine cylinder-body positioning and clamping is looked sketch map to the master on the machining center rotary table, and display size only is the illustration size of carrying out for purpose of explanation among the figure.
Fig. 4 is that the master on the engine cylinder-body positioning and clamping work in-process heart rotary table looks sketch map, has wherein shown the hole that has formed the needs processing on the bottom surface of engine cylinder-body.
Fig. 5 is the sketch map in the preferred implementation of the system of processing of the utility model; Wherein on the machine tool chief axis contact measuring head has been installed; This sketch map has shown the detected state that detects main positioning reference through the contact probe; It only schematically illustrates and detects principle and merge dowel hole on the bottom surface that shown the detection of engine cylinder body and the bottom surface, wherein distinguishes the coordinate direction of being correlated with.
Fig. 6 is the diagrammatic view in principle block diagram of the compensation system of processing of datum drift that is used for engine cylinder-body of the utility model specific embodiment.
Description of reference numerals:
The specific embodiment
Be elaborated below in conjunction with the specific embodiment of accompanying drawing to the utility model; Should be understood that; The specific embodiment described herein only is used for explanation and explains the utility model, and the protection domain of the utility model is not limited to the following specific embodiment.
At first need to prove; The system of processing of the utility model can form a kind of to casing or shell part; The novel work flow of engine cylinder-body for example; The main points of this novel work flow are on the for example bottom surface of adopting transition baseline location machining box or shell part during dependency structure; The main positioning reference of casing or shell part and the deviate of transition positioning reference are compensated in the workpiece coordinate system with the foundation at zero point of transition positioning reference, to improve the machining accuracy of casing or shell part.Need to prove for this reason; One of which, the box parts of the utility model indication mainly is that outer shape is hexahedron or is hexahedral workpiece basically and (but do not get rid of the structure that has hole and so on these box parts; Cylinder hole for example); Shell part mainly is the open workpiece that is used to realize the cover cap function of a side, for helping it will be apparent to those skilled in the art that the utility model, below mainly is that example is described with the engine cylinder-body; They are two years old; Although mainly be that example is explained corresponding work flow in the explanation hereinafter with the machining center; But be apparently to those skilled in the art, the technical conceive of the utility model system of processing can be applied on the various suitable numerically controlled processing equipments equally, for example numerical control drilling machine etc.Therefore, the protection domain of the utility model should not be limited to machining center.
The basic embodiment and the preferred implementation of the compensation system of processing of datum drift of the utility model described on below at first simple property ground; On this basis; In order to help those skilled in the art more profoundly to understand the technical scheme of the utility model; With the system of processing that further describes the utility model the work flow that can realize; And be that example is more specifically described said work flow with the machining center, in the description process, with some the basic process principle and the notions in some machined fields of additional disclosure.
Participate in Fig. 2 to shown in Figure 6; The utility model provides a kind of compensation system of processing of datum drift that is used for casing or shell part; Said casing or shell part are formed with main positioning reference and transition baseline on (for example engine cylinder-body 1); Wherein, Said system of processing comprise numerically controlled processing equipment 5 be used for detecting transition baseline WZP1 at zero point with respect to main positioning reference WZP2 at zero point at the checkout gear 4 of said lathe coordinate system along the measured distance value of X axle, Y axle and Z-direction, this checkout gear can be transferred to detection signal the numerical control unit of said numerically controlled processing equipment 5.
On the basis of above-mentioned basic embodiment; Preferably; Said numerically controlled processing equipment is a horizontal Machining centers; Said checkout gear comprises the contact measuring head 3 on the machine tool chief axis 6 that is used to be installed to said numerically controlled processing equipment, and this contact measuring head 3 can radio to detection signal the numerical control unit of said numerically controlled processing equipment 5.
Below main be that engine cylinder-body 1 is the work flow that example is described the system of processing of the utility model with said casing or shell part; At first describe said system of processing and carrying out operating process; Be that example is described work flow more specifically on this basis with the machining center, to satisfy abundant disclosed requirement.
To shown in Figure 6, the size that wherein shows among Fig. 2 to Fig. 5 only is the illustration size of hereinafter described Δ X, Δ Y and Δ Z etc., does not constitute the restriction to the utility model protection domain referring to Fig. 1.The work flow of the compensation system of processing of the datum drift of the utility model in operating process generally comprises following steps: first step S101; With said transition baseline as positioning reference with said cylinder body 1 positioning and clamping to numerically controlled processing equipment, the transition baseline WZP1 at zero point that said transition baseline forms is respectively Δ X, Δ Y and Δ Z with respect to main positioning reference WZP2 at zero point theoretical distance value along X axle, Y axle and Z-direction in the lathe coordinate system of said numerically controlled processing equipment that said main positioning reference forms; The second step S201; Under the state of said cylinder body positioning and clamping; Detect said transition baseline WZP1 at zero point and be respectively δ X, δ Y and δ Z, and calculate difference φ Y and the difference φ Z between δ Z and the Δ Z between difference φ X, δ Y and the Δ Y between δ X and the Δ X respectively with respect to said main positioning reference WZP2 at zero point measured distance value along X axle, Y axle and Z-direction in said lathe coordinate system; Third step S301; Revise said transition baseline X axle, Y axle and the Z axial coordinate value of zero point in said lathe coordinate system respectively to form the transition baseline zero point of revising through each said difference φ X, φ Y and φ Z, the transition baseline zero point of this correction and said main positioning reference WZP2 at the zero point distance value along X axle, Y axle and Z-direction in said lathe coordinate system equals said theoretical distance value Δ X, Δ Y and Δ Z respectively; The 4th step S401 processes the structure of required processing on the said engine cylinder-body zero point zero point as the workpiece coordinate system of said cylinder body with the transition baseline of said correction.
Above-mentioned work flow has embodied the basic fundamental design of the system of processing of the utility model; Although can relatively easily understand related know-why of above-mentioned work flow or notion to those skilled in the art; But for helping those skilled in the art more profoundly to understand the utility model volume technical scheme, below some know-whies and notion that above-mentioned work flow is related to describe.
First; What above-mentioned work flow was directed against is the continuation processing (being that processing object is the engine cylinder-body semi-finished product that formed main positioning reference and transition positioning reference) of engine cylinder-body; Especially to the following process of the dependency structure on the engine cylinder-body bottom surface, for example the atomizer installing hole on the engine cylinder-body bottom surface, oilhole etc. that is to say; Form main positioning reference on this engine cylinder-body, and also formed transition baseline for the following process of carrying out dependency structure.With regard to the processing of engine cylinder-body, to those skilled in the art apparently, main positioning reference generally can be the engine cylinder-body accurately machined bottom surface of process and be formed on two dowel holes on this bottom surface.Because in the machined field; Sometimes when some structures of processing, be inappropriate for and adopt main positioning reference; Thereby on engine cylinder-body, form transition baseline; For example, obviously be difficult to this moment adopt the dowel hole on bottom surface and the bottom surface to process, introduced transition baseline for this reason as positioning reference owing to the atomizer installing hole on the engine cylinder-body bottom surface, oilhole etc. are formed on the engine cylinder-body bottom surface.To those skilled in the art; Transition baseline can have various forms; As long as follow six point location principles; For example in the utility model, can on the exhaust side of engine cylinder-body, form six false boss faces; Three false boss faces in these six false boss faces are in a plane (when contacting with the setting element of jig, forming three-point fix), and two false boss faces are in a plane (when contacting with the setting element of jig, forming two point locations), and another false boss face is in another plane (when contacting with the setting element of jig, forming a point location); These three planes are vertical each other to form joining (being following positioning reference zero point), thereby forms six point locations.Certainly, the form of transition baseline is varied, is not limited to the above-mentioned concrete form of giving an example of the utility model.
The second, in the first step S101 of above-mentioned work flow, relate to some technological concepts, for example transition baseline zero point, main positioning reference zero point etc., this is known at the numerical control machine manufacture field, gives schematic illustration in order to help to understand at present.
In numerically controlled processing equipment; Numerically controlled processing equipment has the lathe coordinate system of self; Corresponding numerically controlled processing equipment has lathe coordinate system MZP at zero point; The position of this lathe coordinate system MZP at zero point is fixed; It constitutes numerically controlled processing equipment and carries out mach basic point, and the location recognition of numerically controlled processing equipment is based on all that this lathe coordinate system MZP at zero point carries out, and numerically controlled processing equipment need carry out rezero operation (generally cutter moves to the lathe reference point with respect to lathe coordinate system MZP at zero point fixed-site) before carrying out workpiece processing be exactly this reason.
In addition, have the positioning reference of self on the workpiece, positioning reference comprises corresponding location basal plane; According to six point location principles; Three orthogonal location basal planes are intersected in a bit, and this point is positioning reference zero point, that is to say; Positioning reference zero point might not be in esse point, and can be the virtual location point with definite position.At the zero point of positioning reference general formation at zero point machining programming, the authorized personnel of procedure works out the size of each operation program needs processing zero point according to positioning reference.For example, in the utility model,, owing in the processing of engine cylinder-body, do not position, but position through transition baseline with main positioning reference although there is main positioning reference, therefore with transition baseline zero point as programming zero point.When engine cylinder-body 1 when the transition baseline positioning and clamping is to numerically controlled processing equipment, the setting element of jig contacts with the location basal plane of transition baseline, transition baseline overlaps with anchor clamps zero point zero point at this moment.
The transition baseline position of zero point in lathe coordinate system promptly generally confirmed through tool setting technology with respect to the position of lathe coordinate system MZP at zero point, has various ways in the relevant tool setting technology prior art, repeats no more at this.In conventional machining process mentioned above, the following process of engine cylinder-body is directly said transition baseline zero point to carry out following process zero point as workpiece coordinate system.Machine tool all calculated the processing dimension to workpiece zero point with respect to this workpiece coordinate system when so-called workpiece coordinate system zero point promptly processed workpiece on numerically controlled processing equipment.But; As mentioned above; The processing of engine cylinder-body should be processed with main positioning reference as far as possible; Although transition baseline WZP1 at zero point is respectively Δ X, Δ Y and Δ Z with respect to main positioning reference WZP2 at zero point theoretical distance value along X axle, Y axle and Z-direction in the lathe coordinate system of said numerically controlled processing equipment; But this theoretical distance value only is the ideal value that draws according to design drawing; It is transition baseline WZP1 at zero point has design in the lathe coordinate system of said numerically controlled processing equipment with respect to main positioning reference WZP2 at zero point distance value; But because the mismachining tolerance and the positioning and clamping errors of engine cylinder-body on numerically controlled processing equipment of transition baseline itself; Therefore there is deviation in transition baseline WZP1 at zero point with theoretical distance value Δ X, Δ Y and Δ Z inevitably with respect to main positioning reference WZP2 at zero point measured distance value along X axle, Y axle and Z-direction in the lathe coordinate system of said numerically controlled processing equipment, and this deviation that is caused by the benchmark disunity can have influence on the dimensional accuracy and the positional precision of the dependency structure of following process, thereby makes the processing inaccuracy.
The 3rd; In the second step S201 of above-mentioned work flow; The system of processing of the utility model is under the state of said cylinder body 1 positioning and clamping; Detect transition baseline WZP1 at zero point with respect to main positioning reference WZP2 at zero point measured distance value δ X, δ Y and δ Z along X axle, Y axle and Z-direction in lathe coordinate system; And calculate the difference between each measured distance value and its corresponding theory distance value, i.e. difference φ Z between difference φ Y between difference φ X between δ X and the Δ X, δ Y and the Δ Y and δ Z and the Δ Z respectively.
The relevant detection method that adopts can have multiple, can measure through direct measuring mode the most simply, for example measures the numerical control unit that the measured distance value is input to numerically controlled processing equipment through photoelectric measurement method.Certainly; In the numerical control machine manufacture field, can measure through gauge head; For example the system of processing of the utility model can adopt contact measuring head; The parameter signal that this contact measuring head will detect is used to obtain the measured distance value is transferred to the numerical control unit of numerically controlled processing equipment, obtains measured distance value and the difference between each measured distance value and its corresponding theory distance value relatively thereby handle through numerical control unit.Said contact measuring head can be the contact measuring head that can the parameter signal that detect be wirelessly transmitted to the numerical control unit of numerically controlled processing equipment; For example the contact measuring head of Renishaw company of Britain's gauge head manufacturer production can be transferred to the numerical control of machine tools unit with the measurement parameter signal wireless in this gauge head measuring process in real time.Apparently; In order to accomplish above-mentioned testing; The system of processing of the utility model should comprise the relevant detection device; At numerically controlled processing equipment is under the situation of horizontal Machining centers, owing to be built-in with the process of measurement (promptly can handle the dependency structure parameter of contact measuring head transmission and the process of measurement of location parameter signal) of standard in the numerical control unit of horizontal Machining centers, therefore said checkout gear can be for realizing the contact measuring head of wireless transmission; The spindle nose that when detecting, contact measuring head is installed to horizontal Machining centers is measured and is got final product; Certainly since need to measure be transition baseline WZP1 at zero point with respect to main positioning reference WZP2 at zero point measured distance value along X axle, Y axle and Z-direction in lathe coordinate system, therefore generally need set up measurement coordinate system, this measurement coordinate system can be confirmed the transition baseline position at zero point through tool setting technology with respect to lathe coordinate system zero point; And then with transition baseline zero point be that initial point is set up measurement coordinate system; This is apparently to those skilled in the art, embodies in the procedure of giving an example hereinafter, repeats no more at this.For example; In the system of processing of the utility model preferred implementation; Adopt contact measuring head to be mainly used in to measure main positioning reference zero point with respect to the transition baseline position at zero point; Setting up under the situation of measurement coordinate system zero point with transition baseline; Detect the structural parameters and the location parameter of the location structure of main positioning reference through contact measuring head 3; For example said main positioning reference is generally the bottom surface and two dowel holes that are formed on this bottom surface of engine cylinder-body; The structural parameters signal through in measurement coordinate system, measuring two dowel holes and the coordinate figure location parameter of four points on the engine cylinder-body bottom surface are also got its mean value, and then through measurement data signals is handled calculating, and when detecting, obtain transition baseline zero point WZP1 with respect to the relative position at transition baseline zero point according to said contact measuring head 3 and be respectively δ X, δ Y and δ Z with respect to main positioning reference WZP2 at zero point along the measured distance value of X axle, Y axle and Z-direction.In addition; As a kind of simple variant form; If the numerically controlled processing equipment that adopts does not comprise under the situation of relevant canonical measure program; The system of processing of the utility model can comprise independently checkout gear fully; This checkout gear can comprise the processing unit of contact measuring head and built-in process of measurement, and the contact measuring head data measured can be passed through the numerical control unit that is transferred to numerically controlled processing equipment after the processing unit processes again, and this simple variant form belongs to the protection domain of the utility model equally.
The 4th; In the third step S301 of above-mentioned work flow; Revise X axle, Y axle and the Z axial coordinate value of said transition baseline WZP1 at zero point in said lathe coordinate system respectively to form the transition baseline zero point of revising through each said difference φ X, φ Y and φ Z; That is to say; WZP1 at zero point is the basis with said transition baseline; Each said difference φ X, φ Y and φ Z are compensated in the respective coordinate value of transition baseline WZP1 at zero point, thereby form transition baseline zero point of a correction, the transition baseline zero point of this correction and said main positioning reference WZP2 at the zero point distance value along X axle, Y axle and Z-direction in said lathe coordinate system equals said theoretical distance value Δ X, Δ Y and Δ Z respectively; No longer there are deviation in the transition baseline zero point of i.e. this correction and the distance value of main positioning reference between zero point, but equal the theoretical distance value on the design drawing.The relevant method of revising or compensating is known to those skilled in the art; Basically exactly X axle, Y axle and the Z axial coordinate value of transition baseline WZP1 at zero point in said lathe coordinate system added corresponding difference or deduct corresponding difference; The coordinate figure that wherein need consider transition baseline WZP1 at zero point and main positioning reference WZP2 at zero point positive and negative in lathe coordinate system; This is relevant with main positioning reference coordinate position at zero point with transition baseline zero point; For the processing of engine cylinder-body, generally X axle, Y axle and the Z axial coordinate value of transition baseline WZP1 at zero point in said lathe coordinate system added that corresponding difference gets final product.Certainly, be significantly for the authorized personnel of procedure or technologist, get final product through simple difference add operation in the for example described hereinafter procedure.
The 5th; In the 4th step S401 of above-mentioned work flow is rapid; Process the structure of required processing on the said engine cylinder-body zero point zero point as the workpiece coordinate system of said cylinder body with the transition baseline of said correction; That is to say, although the establishment of procedure work out zero point with transition baseline because each said difference φ X, φ Y and φ Z compensate to respectively on X axle, Y axle and the Z axial coordinate value of said transition baseline WZP1 at zero point in said lathe coordinate system; Therefore workpiece coordinate system zero point actual be transition baseline zero point through revising, promptly cutter is to move zero point with respect to the transition baseline of revising.In addition; It should be noted that; Although the system of processing of the utility model is primarily aimed at the processing of the dependency structure on the engine cylinder-body bottom surface in the explanation of preceding text; But the technical conceive of the utility model is not limited to this, in fact, and the dependency structure on other four surfaces of the engine cylinder-body except engine cylinder-body bottom surface and end face; All can adopt the system of processing of the utility model to process, so the protection domain of the utility model is not limited to process the hole on the engine cylinder-body bottom surface etc.
Can find out through above-mentioned explanation work flow; Although the system of processing of the utility model has adopted the positioning reference of transition baseline as engine cylinder-body; But owing to ingeniously in process compensated the actual deviation between transition baseline and the main positioning reference; Therefore can there be deviation in the dependency structure of the engine cylinder-body of the system of processing processing through the utility model basically with respect to main positioning reference, that is to say, although the system of processing of the utility model has adopted transition baseline as positioning reference; But can not produce the error that benchmark does not overlap, thereby improve the crudy of engine because of the benchmark disunity.
In the above-mentioned work flow of the system of processing of the utility model, as stated, usually, the bottom surface that said main positioning reference is said engine cylinder-body 1 (being the oil sump installed surface) and be formed on two dowel holes on the bottom surface of this engine; Said transition baseline is the false boss face that is formed on said engine cylinder-body 1 exhaust side, and each false boss face forms the location basal plane that is used to locate said engine cylinder-body 1.More specifically, the structure of required processing can be atomizer installing hole on the bottom surface of said engine cylinder-body 1 and/or oilhole etc. on the said engine cylinder-body.
More preferably; Be formed with gauge orifice on the said jig, can also comprise the coordinate figure that detects in the lathe coordinate system of said gauge orifice at said numerically controlled processing equipment at the first step of above-mentioned work flow, and the comparison of the standard coordinate value of the coordinate figure that will detect and predefined this gauge orifice; Difference between the two is no more than the target offset value; To guarantee probe measurement precision according with process requirements, for example when processing engine cylinder-body, the target offset value is decided to be 0.03mm with the work flow of the utility model; As long as be no more than 0.03mm, the certainty of measurement according with process requirements of probe is described.The main purpose in hole of on jig, setting up standard is to detect the accuracy that gauge head is measured, and generally each order of classes or grades at school is with gauge orifice of probe measurement.Generally speaking; The position of the relative lathe of gauge orifice on jig MZP at zero point is fixed; If the standard coordinate value deviation of the actual coordinate value of probe measurement gauge orifice and setting explains then that greater than the target offset value probe measurement error is excessive, need adjustment or replacing.
Further, above-mentioned numerically controlled processing equipment can be horizontal Machining centers, generally can adopt the stronger four-axle linked formula horizontal Machining centers of versatility; There are general definition standard in the X axle of the lathe coordinate system of machining center, Y axle, Z axle, generally be parallel to the machining center main shaft for the Z axle, short transverse be the Y axle; Another reference axis is the X axle, and in addition, the rotation of rotary table 2 constitutes the B axle; This is known to those skilled in the art, repeats no more.Under numerically controlled processing equipment can the situation for horizontal Machining centers; Preferably; Can carry out the testing of each said measured distance value δ X, δ Y and δ Z through contact measuring head; And the data-signal that detects is transferred to the numerical control unit of said numerically controlled processing equipment, more preferably, said contact measuring head is wirelessly transmitted to the data-signal that detects the numerical control unit of said numerically controlled processing equipment.
The work flow of the system of processing of the utility model has below been described comparatively abstractively; In order to help those skilled in the art more profoundly to understand the technical scheme of the utility model; Following system of processing with reference to the utility model among Fig. 2 to Fig. 6 adopts the preferred implementation of horizontal Machining centers relatively comprehensively to describe the work flow of the utility model; It should be noted that work flow is not limited to the details shown in the figure in practical application, in addition; Because the design of relevant key is illustrated hereinbefore, so hereinafter will suitably be given schematic illustration.
As stated; The system of processing of the utility model is in order to eliminate or reduce the influence of this error; Its major technology design is to introduce the machining center detection process; That is: engine cylinder-body adopts transition baseline location on jig,, surveys main positioning reference (being bottom surface C and dowel hole A, the D of engine cylinder-body) with gauge head earlier before the machine tooling with the cylinder body bottom surface of needs processing outwardly; Then positioning reference zero point and the deviate of transition baseline between zero point are compensated on the transition baseline coordinate figure at zero point forming workpiece coordinate system in zero point, thereby reduce corresponding error.
Said horizontal Machining centers adopts Simens (Siemens) digital control system that extensively adopts; The locator(-ter) that comprises standard in this digital control system; Comprising the standardization program CYCLE977 of measured hole and the standardization program CYCLE978 of the face of measurement; Mix special-purpose gauge head again and just can realize the accurate measurement in the heart of hole and face work in-process, can result of detection be exported with variable after the measurement, thereby can solve the not problem of coincidence error of benchmark with the method that lathe is surveyed in theory.In order to guarantee certainty of measurement; What select for use is the contact measuring head of the famous Renishaw company of gauge head manufacturer of Britain; Can in real time measurement data be wirelessly transmitted in the numerical control unit of horizontal Machining centers in this gauge head measuring process, carry out Synchronization Analysis by numerical control unit then and handle.
Particularly; Transition baseline is six false boss face R1, R2, R3, S1, S2, the T (specifically not showing among the figure) that is formed on the exhaust side of engine cylinder-body; Wherein false boss face R1, R2, R3 are in same plane, are denoted as R in the drawings, and false boss face S1, S2 are in same plane; Be denoted as S in the drawings, false boss face Z is denoted as T in the drawings.The committee's processing in addition of said transition baseline also can be processed voluntarily.When engine cylinder-body 1 is carried out following process, at first adopt said transition baseline positioning and clamping engine cylinder-body, with engine cylinder-body 1 positioning and clamping to the rotary table 2 of horizontal Machining centers.Then; Measure the location feature structure of main positioning reference with gauge head; Promptly measure cylinder body bottom surface C and dowel hole A, D (see figure 4); Thereby detection computations goes out measured distance value δ X, δ Y and the δ Z under the positioning and clamping state between transition baseline WZP1 at zero point and the main positioning reference WZP2 at zero point, and theoretical distance value Δ X, Δ Y and the Δ Z on this measured distance value δ X, δ Y and δ Z and the design drawing compared, and difference is compensated on transition baseline WZP1 at zero point each coordinate figure in lathe coordinate system; Thereby form workpiece coordinate system zero point, reduce thus benchmark not coincidence error to the influence of crudy.
For example, on horizontal Machining centers, add man-hour, transition baseline is expressed as WZP1 zero point, and main positioning reference is expressed as WZP2 and representes that lathe coordinate system is represented with MZP zero point zero point.At lathe B Shaft angle is 180 when spending; The bottom surface of engine cylinder-body is towards the machining center main shaft; After engine cylinder-body 1 positioning and clamping is to the rotary table 2 of horizontal Machining centers; Suppose this moment three directions of transition baseline WZP1 at zero point work in-process heart X/Y/Z axle with respect to the distance of lathe coordinate system MZP at zero point be respectively 212.5mm, 380mm and-83mm (generally through the acquisition of tool setting technology); (this can obtain according to the design drawing of engine cylinder-body to be respectively 7.5mm, 258mm and 383mm along three directions of X/Y/Z axle with respect to theoretical distance value Δ X, Δ Y and the Δ Z of transition baseline WZP1 at zero point in main positioning reference WZP2 at the zero point lathe coordinate system; Because main positioning reference and transition baseline all are that the designer designs; Therefore theoretical distance value is known; The engine cylinder-body positioning and clamping to the rotary working platform of machining center, under the perfect condition of not considering clamping error, transition baseline mismachining tolerance etc., all should be confirmed along theoretical distance value Δ X, Δ Y and the Δ Z of three directions of X/Y/Z axle with respect to transition baseline WZP1 at zero point in main positioning reference WZP2 at the zero point lathe coordinate system in lathe coordinate system).The position relation of each coordinate between zero point is referring to Fig. 2 to Fig. 5.
Suppose and need on the cylinder body bottom surface, bore a hole, the hole number is H6001, and this hole is respectively-255.5mm and 235mm apart from transition baseline WZP1 at zero point at the X/Y both direction, and the aperture is 383mm in the distance of Z direction distance W ZP1.Under this situation; For making this area more profoundly understand the technical scheme of the utility model; Below provide concrete procedure; Therefrom can obviously find out each step of the machining center that the utility model adopts, said horizontal Machining centers adopts Simens (Siemens) digital control system that extensively adopts.Particularly, band metrophia compensation processing technology (to those skilled in the art knownly, is the note language of specific procedure statement behind the branch in the following procedure, only helps to read debugging routine, do not carry out for machining center) as follows:
The first, the measurement coordinate system when detecting main positioning reference WZP2 is set, make the gauge head detection position be displaced to transition baseline WZP1 at zero point to set up measurement coordinate system by lathe coordinate system MZP at zero point.
$P_UIFR [90, X, TR]=212.5; WZP1 and MZP differ 212.5mm at directions X
$P_UIFR [90, Y, TR]=380; WZP1 and MZP differ 380mm in the Y direction
$P_UIFR [90, Z, TR]=-83; WZP1 and MZP differ 83mm in the Z direction
$P_UIFR [90, B, TR]=0; WZP1 is consistent with MZP B shaft angle degree
The second, call the measurement coordinate system that sets with G590, and under this measurement coordinate system, work out locator(-ter).
(1) gaging hole block:
(2) survey the face block:
The 3rd, the coordinate system when machining hole H6001 is set is displaced to anchor clamps WZP1 at zero point by lathe MZP at zero point with coordinate zero point.
$P_UIFR [1, X, TR]=212.5; WZP1 and MZP differ 212.5mm at directions X
$P_UIFR [1, Y, TR]=380; WZP1 and MZP differ 380mm in the Y direction
$P_UIFR [1, Z, TR]=-83; WZP1 and MZP differ 83mm in the Z direction
$P_UIFR [1, B, TR]=0; WZP1 is consistent with MZP B shaft angle degree
The 4th, the WZP2 that probe measurement is come out on the X/Y/Z direction with WZP1 on deviate R307/R308/R520 compensate to respectively in the workpiece coordinate system of hole H6001
$P_UIFR [1, X, TR]=212.5+R307; Compensate to the X coordinate with R307
$P_UIFR [1, Y, TR]=380+R308; Compensate to the Y coordinate with R308
$P_UIFR [1, Z, TR]=-83+R520; Compensate to the Z coordinate with R520
The 5th, call the workpiece coordinate system that sets with G54, and under this coordinate system machining programming.
G0 G5 4X-255.5Y235 M3 D1; Main shaft moves on to the position of X-255.5 Y235 fast
G0 Z=383+3; Main shaft moves on to the position of the 3mm from the aperture fast along the Z axle
G1 Z=383-10; Boring, hole depth 10mm
G0 Z600; The Z axle falls back on home fast
Can find out by last description; The utility model advantage is: the compensation system of processing of the datum drift that is used for casing or shell part of the utility model can be through measuring casing or shell part; The main positioning reference of engine cylinder-body for example; Find out main positioning reference zero point and the position deviation of transition baseline zero point (being anchor clamps zero points) on the X/Y/Z direction of principal axis; Then with this position deviation compensation transition baseline each coordinate figure at zero point, thereby form transition baseline zero point of revising as workpiece coordinate system zero point.Can reduce effectively like this benchmark not coincidence error to the influence of machining accuracy.That is to say; Although the system of processing of the utility model has adopted the positioning reference of transition baseline as engine cylinder-body; But owing in process, can compensate the actual deviation between transition baseline and the main positioning reference dexterously; Therefore can there be deviation in the casing of the system of processing processing through the utility model or the dependency structure of shell part basically with respect to main positioning reference, that is to say, although the system of processing of the utility model has adopted transition baseline as positioning reference; But can not produce the error that benchmark does not overlap, thereby improve the crudy of casing or shell part because of the benchmark disunity.For example, two engine cylinder-body production lines of applicant have all passed through the trial-production examination at present, and its working ability and crudy meet design standard fully.Although only be to be that example is described with the engine cylinder-body in the specific embodiment of preceding text, to those skilled in the art apparently, the system of processing of the utility model can generally be applicable to other casing or shell part.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned embodiment; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technical scheme of the utility model, these simple variant all belong to the protection domain of the utility model.In the explanation of the specific embodiment, only carried out schematic illustration from the purpose of being convenient to understand about the know-why and the notion of digital control processing, relevant known technology notion can be with reference to the reference book and the handbook of relevant digital control processing.
Need to prove that each the concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various embodiment of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.

Claims (2)

1. the compensation system of processing of datum drift that is used for casing or shell part; Be formed with main positioning reference and transition baseline on said casing or the shell part; It is characterized in that; Said system of processing comprise numerically controlled processing equipment (5) and be used for detecting transition baseline zero point (WZP1) with respect to main positioning reference zero point (WZP2) at the lathe coordinate system of said numerically controlled processing equipment checkout gear (4) along the measured distance value of X axle, Y axle and Z-direction, this checkout gear (4) can be transferred to detection signal the numerical control unit of said numerically controlled processing equipment (5).
2. system of processing according to claim 1; It is characterized in that; Said numerically controlled processing equipment (5) is a horizontal Machining centers; Said checkout gear is the contact measuring head (3) on the machine tool chief axis (6) that is used to be installed to said horizontal Machining centers, and this contact measuring head (3) can radio to detection signal the numerical control unit of said numerically controlled processing equipment (5).
CN2012200614071U 2012-02-22 2012-02-22 Datum deviation compensation type processing system for box body or shell part Withdrawn - After Issue CN202528009U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103286631A (en) * 2012-02-22 2013-09-11 北京福田康明斯发动机有限公司 Benchmark deviation compensation type processing method and system used for box or shell part
CN107649845A (en) * 2017-11-09 2018-02-02 东方电气集团东方汽轮机有限公司 A kind of large scale combustion engine turbine blade essence casting blank positioning and processing method
CN109352372A (en) * 2018-11-12 2019-02-19 北京星航机电装备有限公司 A kind of quick-adjustsing method of realization part benchmark

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103286631A (en) * 2012-02-22 2013-09-11 北京福田康明斯发动机有限公司 Benchmark deviation compensation type processing method and system used for box or shell part
CN103286631B (en) * 2012-02-22 2015-08-12 北京福田康明斯发动机有限公司 For the compensation processing method of datum drift and the system of casing or shell part
CN107649845A (en) * 2017-11-09 2018-02-02 东方电气集团东方汽轮机有限公司 A kind of large scale combustion engine turbine blade essence casting blank positioning and processing method
CN109352372A (en) * 2018-11-12 2019-02-19 北京星航机电装备有限公司 A kind of quick-adjustsing method of realization part benchmark

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