CN110369971A - A kind of mill bar processing technology of the grinding machine with external screw thread taper shank - Google Patents

A kind of mill bar processing technology of the grinding machine with external screw thread taper shank Download PDF

Info

Publication number
CN110369971A
CN110369971A CN201910764873.2A CN201910764873A CN110369971A CN 110369971 A CN110369971 A CN 110369971A CN 201910764873 A CN201910764873 A CN 201910764873A CN 110369971 A CN110369971 A CN 110369971A
Authority
CN
China
Prior art keywords
shank
embryo
bar
rotary
grinding machine
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
CN201910764873.2A
Other languages
Chinese (zh)
Other versions
CN110369971B (en
Inventor
颜子军
唐霞
毛齐
白海波
杨义
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.)
Sichuan Aerospace Beacon Servo Control Technology Co Ltd
Original Assignee
Sichuan Aerospace Beacon Servo Control Technology Co Ltd
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 Sichuan Aerospace Beacon Servo Control Technology Co Ltd filed Critical Sichuan Aerospace Beacon Servo Control Technology Co Ltd
Priority to CN201910764873.2A priority Critical patent/CN110369971B/en
Publication of CN110369971A publication Critical patent/CN110369971A/en
Application granted granted Critical
Publication of CN110369971B publication Critical patent/CN110369971B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/06Work supports, e.g. adjustable steadies
    • B24B41/061Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically

Abstract

The present invention discloses a kind of mill bar processing technology of the grinding machine with external screw thread taper shank, comprising: takes solid raw material to carry out roughing, to form the thick embryo of pre-set dimension;Semifinishing is carried out to thick embryo, with form pre-set dimension half smart embryo;Rotary table on verification bar clamping to the rotary table of grinding machine, will be made to rotate horizontally α/2 jiao, and the shank male cone (strobilus masculinus) of fine grinding verification bar along preset direction;The head jerk value of verification bar is checked, to finely tune the rotation angle of rotary table accordingly, and shank male cone (strobilus masculinus) to its head jerk value of fine grinding verification bar reaches pre-set tolerance requirement again;Rotary table is fixed on present rotation angel degree position after disassembly verification bar, and half-and-half smart embryo is finished, then will be on half smart embryo clamping to the rotary table, and fine grinding is carried out to the male cone (strobilus masculinus) of its shank.The present invention can be improved the taper shank machining accuracy to mill bar, guarantee the dynamic balancing in mill bar process, improve mill bar processing quality qualification rate.

Description

A kind of mill bar processing technology of the grinding machine with external screw thread taper shank
Technical field
The present invention relates to technical field of mechanical processing, in particular to a kind of grinding machine processes work with the mill bar with external screw thread taper shank Skill.
Background technique
In the field of machining, piston rod and pressurized strut on deep-hole parts, such as actuator etc., the depthometer in hole Very little general all in 300~500mm or more, the size accuracy of form and position is about 0.01mm, roughness Ra 0.4.Only using milling cutter or boring cutter Roughing can be carried out to the deep hole of such part, it is necessary if to complete the semifinishing or finishing of such part deep-hole It is carried out on inside and outside mill grinding machine.
Attachment --- the mill bar used on common inside and outside mill grinding machine equipment, material are often generally steel 45, belong to middle carbon Steel, hardness number is generally 38~42HRC after heat-treatment quenching.Under normal circumstances, factory is when buying grinding machine, only in addition It is configured with minimal amount of attachment-mill bar, and some mill bars then need oneself to be made by oneself according to needs of production.According to mill Mill bar can be divided into three parts in axial direction by the use function at each position on bar: head is mill bar head, is provided with screw thread Hole fastens small grinding wheel for installing positioning;Tail portion is shank, is provided with male cone (strobilus masculinus) and external screw thread, is positioned for installing mill bar It is fastened in the spindle taper hole of inside and outside mill grinding machine;Middle section is linkage section, plays a part of to connect head and tail portion.Linkage section Length dimension value, depending on being processed the depth dimensions value size in hole on product parts.
For having the mill bar of external screw thread taper shank, such as mill bar of the length greater than 300~500mm, the difficulty of mill bar is processed Coefficient ratio is larger, is to be difficult to process qualified mill bar if the method for design and manufacture mill bar is not proper.Currently, mill bar Design generally has 2 kinds with manufacturing method:
First is that it is mill bar that mill bar head and main body, which are passed through welding processing, mill bar is divided into two parts: mill bar head, main body.At this moment, In order to mitigate the weight of mill bar as far as possible, the center of gravity of mill bar is designed to the one end for being transferred to and being biased to main body shank as far as possible, to solve to grind The dynamic balancing of bar, and a very deep blind hole (such as Ф 12mm depth 300mm) is provided in main body.Then, welding side is taken Mill bar head and main body welding processing are integrated by formula.Because the bending deformation of mill bar is larger when welding, in this way, to ensure main body On deep blind hole 0.01mm is not more than to the concentricity of outer circle each in mill bar, difficulty of processing is very big.Moreover, being ground with inside and outside mill The internal taper hole of main shaft on bed apparatus is by smearing " red lead powder " and by people when match grinding processes the male cone (strobilus masculinus) of shank in mill bar Naked eyes observe the fitting rate for judging that its is mutual, then carry out judging whether its male cone (strobilus masculinus) qualified.Therefore, the qualification of the program Rate is very low, usually less than 2%.
Second is that it is mill bar that mill bar head, connecting tube and main body, which are passed through welding processing, mill bar is divided into three parts: mill bar head connects Adapter tube, main body.At this point, the internal-external circle concentricity of connecting tube is controllable to 0.01mm if individually processing connecting tube, but It is, after the mill bar that mill bar head, connecting tube and main body welding processing are integrated, because the bending deformation of mill bar is larger when welding, To ensure that the hole in connecting tube is all not more than 0.01mm to the concentricity of each outer circle in whole mill bar, difficulty of processing is still It is very big.Moreover, it is identical as first method, with shank in the internal taper hole match grinding processing mill bar of main shaft on inside and outside mill grinding machine equipment When male cone (strobilus masculinus), be still the fitting rate for judging that its is mutual is only observed only by human eye by smearing " red lead powder ", then Carry out judging whether its male cone (strobilus masculinus) is qualified.Therefore, the qualification rate of the program is equally very low, usually also less than 2%.
Therefore, the taper shank machining accuracy to mill bar how is improved, guarantees the dynamic balancing in mill bar process, improves mill bar Processing quality qualification rate is the technical issues of those skilled in the art is faced.
Summary of the invention
The object of the present invention is to provide a kind of mill bar processing technology of grinding machine with external screw thread taper shank, can be improved to mill bar Taper shank machining accuracy, guarantee mill bar process in dynamic balancing, improve mill bar processing quality qualification rate.
In order to solve the above technical problems, the present invention provides a kind of mill bar processing technology of the grinding machine with external screw thread taper shank, packet It includes:
Take solid raw material to carry out roughing, to form the thick embryo of pre-set dimension, the thick embryo include head, interconnecting piece, Shank and tail portion;
Semifinishing is carried out to the thick embryo, with form pre-set dimension half smart embryo, the half smart embryo includes being in the form of a column Head and tail portion, interconnecting piece and shank in cone rod shape;
Will verification bar clamping to the rotary table of grinding machine on, make the rotary table along preset direction rotate horizontally α/ 2 jiaos, and the shank male cone (strobilus masculinus) of bar is verified described in fine grinding;Wherein, α is the cone angle of the shank of described half smart embryo, the verification The shape of bar is identical as described half smart embryo;
The head jerk value for checking the verification bar, to finely tune the rotation angle of the rotary table accordingly, and again Shank male cone (strobilus masculinus) to its head jerk value for refining the verification bar reaches pre-set tolerance requirement;
It dismantles and the rotary table is fixed on present rotation angel degree position after the verification bar, and to described half smart embryo It is finished, to form the threaded hole on its head and the external screw thread of tail portion, then by described half smart embryo clamping to the rotation work Make on platform, and fine grinding is carried out to the male cone (strobilus masculinus) of its shank.
Preferably, after roughing and before progress semifinishing, further includes:
The thick embryo is heat-treated, to reach default hardness requirement.
Preferably, after being heat-treated to the thick embryo and before progress semifinishing, further includes:
The thick embryo is straightened, so that the concentricity of its each cross section meets pre-set tolerance requirement.
Preferably, the thick embryo is straightened, is specifically included:
Clearance fit is formed by the head of preset standard sleeve and the thick embryo;
Benchmark is detected using the outer circle of the standard sleeve as the maximum outer circle and concentricity of the thick embryo, and passes through swage Tool is straightened the thick embryo.
Preferably, when carrying out semifinishing to the thick embryo, the half smart embryo further includes being connected to the interconnecting piece and institute State the plat part between shank, for cooperating with dismantling device, and the diameter of the plat part and the interconnecting piece and the handle The outside diameter in portion is equal.
Preferably, when carrying out semifinishing to the thick embryo, the thick embryo is ground by the grinding wheel of pre-set dimension Processing, and the outer circle central area of the grinding wheel offers the groove for reducing contact area.
Preferably, the rotation angle for finely tuning the rotary table, specifically includes:
The inner conical surface of the shank male cone (strobilus masculinus) of the verification bar and grinding machine spindle is assembled, and judges that the fitting of the two is tight Close situation;
When the big end regions of the shank male cone (strobilus masculinus) of the verification bar are bonded and small petiolarea with the inner conical surface of the grinding machine spindle The inner conical surface of domain and the grinding machine spindle passes through formula there are when gap:
The rotation amount of the rotary table is calculated, and the rotary table is rotated with this;
When the small end regions of the shank male cone (strobilus masculinus) of the verification bar are bonded and big petiolarea with the inner conical surface of the grinding machine spindle The inner conical surface of domain and the grinding machine spindle passes through formula there are when gap:
The rotation amount of the rotary table is calculated, and the rotary table is rotated with this;
Wherein, Δ s is the transverse rotation distance of beating table at position of the rotary table in amesdial, and m is the rotation Amesdial on revolving worktable beats position at table, and at a distance from the axis of rotation position of the rotary table, n is the verification The current jerk value of club head, l1Big end distance for the head end for verifying bar to its shank male cone (strobilus masculinus), l2For the school The head end of bar is tested to the small end distance of its shank male cone (strobilus masculinus).
Mill bar processing technology of the grinding machine provided by the present invention with external screw thread taper shank mainly includes five steps, the In one step, acquisition solid raw material first carries out roughing, to form the thick embryo of pre-set dimension, default precision, wherein the thick embryo Including head, four part of interconnecting piece, shank and tail portion, and interconnecting piece is processed into cone rod shape, and head, shank and tail portion are at this time It is cylindrical.In this step, since thick embryo uses solid raw material, the material on the arbitrary cross section in the axial direction of thick embryo Matter distribution is all uniformly that, it is easy to ensure that the coaxial accuracy of each surface of revolution, dynamic equilibrium state is easier to reach.In second step In, main contents are to carry out semifinishing to thick embryo, to form half smart embryo of pre-set dimension, default precision, wherein should half smart embryo In head and tail portion it is still cylindrical, and shank has been processed into cone rod shape as interconnecting piece.In the third step, in main Hold to process current workpiece --- the verification operation before the shank male cone (strobilus masculinus) of half smart embryo needs to take verification bar in this step, By on the verification bar horizontal clamping to the rotary table of grinding machine, rotary table is then adjusted, its up time in the horizontal direction is made Needle or rotation alpha/2 jiao counterclockwise, later the shank male cone (strobilus masculinus) of the fine grinding verification bar again.Wherein, the shape and structure of bar is verified It is identical with half smart embryo, it is equivalent to and takes another stored workpiece as test, to determine the rotation of rotary table in advance Angle;And the angle α is the cone angle of the shank of half smart embryo, it, can be on grinding machine by shank outer cone after rotary table rotation alpha/2 jiao Face is placed in horizontal longitudinal direction, and grinding wheel is facilitated to process.In the 4th step, after the completion of the shank male cone (strobilus masculinus) fine grinding for verifying bar, check The head jerk value for verifying bar, because head is for being installed with small grinding wheel to be ground deep-hole parts, therefore head bounce The required precision of amount is very high.The rotation angle of rotary table is finely tuned after check according to difference, and continues the handle of fine grinding verification bar Portion's male cone (strobilus masculinus), until jerk value reaches pre-set tolerance requirement until its head.In the 5th step, due to by third and fourth step Accurate adjustment of the bar to the rotation angle of rotary table is verified, at this time can be directly to current workpiece, i.e., half smart embryo carries out outside shank Cone face process.Verification bar is dismantled from rotary table first, rotary table is then fixed on present rotation angel degree Position then first processes the threaded hole on half smart embryo head and the external screw thread of tail portion, then half smart embryo clamping to rotation work Make to be finished on platform, fine grinding is carried out to its shank male cone (strobilus masculinus).In this way, due to outside the shank of the smart embryo of formal processing half When the conical surface, verification bar is first passed through and accurate adjustment, therefore the rotation after accurate adjustment is carried out to the rotation angle of the rotary table of grinding machine When half-and-half the shank male cone (strobilus masculinus) of smart embryo carries out fine grinding on revolving worktable, the taper shank processing essence to mill bar can be greatly improved Degree improves mill bar processing quality qualification rate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of specific embodiment provided by the present invention.
Fig. 2 is a kind of mill bar structural schematic diagram of grinding machine with external screw thread taper shank.
Fig. 3 is the concrete structure schematic diagram of thick embryo.
The concrete structure schematic diagram covered on the basis of Fig. 4.
Fig. 5 is the structural schematic diagram being straightened using standard sleeve to thick embryo.
Fig. 6 is the grinding wheel structure schematic diagram that grinding is processed to thick embryo.
Fig. 7 is the concrete structure schematic diagram of the smart embryo of headed threaded hole and tail portion externally threaded half.
Fig. 8 is the concrete structure schematic diagram for verifying bar.
Fig. 9 is the installation and debugging schematic diagram for verifying bar and grinding machine spindle.
Figure 10 is the structural schematic diagram for verifying bar fine grinding shank male cone (strobilus masculinus) on rotary table.
Figure 11 is the installation and debugging schematic diagram of smart embryo and grinding machine spindle.
Figure 12 is the head of smart embryo and the mounting structure schematic diagram of small grinding wheel.
Figure 13 is the structural schematic diagram that elongated hole type parts are processed by mill bar.
Wherein, in Fig. 2-Figure 13:
Mill bar -1, thick embryo -2, half smart embryo -3, smart embryo -4 verify bar -5, standard sleeve -6, grinding wheel -7, grinding machine master Axis -8, fixing seat -9, axis of rotation -10, rotary table -11, top -12, small grinding wheel -13, screw -14, pad Circle -15;
Head -1a, interconnecting piece -1b, plat part -1c, shank -1d, tail portion -1f;
Threaded hole -101, external screw thread -102, groove -701.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of flow chart of specific embodiment provided by the present invention.
In a kind of specific embodiment provided by the present invention, grinding machine is with the mill bar processing technology master with external screw thread taper shank It to include five steps.
Wherein, in the first step, solid raw material is obtained first and carry out roughing, to form pre-set dimension, default precision Thick embryo 2, wherein the thick embryo 2 include head 1a, tetra- part interconnecting piece 1b, shank 1d and tail portion 1f, and interconnecting piece 1b process At cone rod shape, head 1a, shank 1f and tail portion 1f are cylindrical at this time.In this step, since thick embryo 2 uses solid former material Material, the material distribution on the arbitrary cross section in the axial direction of thick embryo 2 is all uniformly, it is easy to ensure that the concentricity of each surface of revolution Precision, dynamic equilibrium state are easier to reach.
In second step, main contents are to carry out semifinishing to thick embryo 2, to form the half of pre-set dimension, default precision Smart embryo 3, wherein the head 1a and tail portion 1f being somebody's turn to do in half smart embryo 3 are still cylindrical, and shank 1d is processed into as interconnecting piece 1b Cone rod shape.
In the third step, main contents are the current workpiece of processing --- the verification behaviour before the shank male cone (strobilus masculinus) of half smart embryo 3 Make, needs to take verification bar 5 in this step and then adjusted on the horizontal clamping of verification bar 5 to the rotary table 11 of grinding machine Rotary table 11 makes its α/2 jiao clockwise or counterclockwise in the horizontal direction, later the fine grinding verification bar 5 again Shank male cone (strobilus masculinus).Wherein, the shape and structure for verifying bar 5 is identical with half smart embryo 3, is equivalent to and takes another stored workpiece conduct Test, to determine the rotation angle of rotary table 11 in advance;And the angle α is the cone angle of the shank of half smart embryo 3, rotary table After 11 rotation alpha/2 jiao, shank male cone (strobilus masculinus) can be placed in horizontal longitudinal direction on grinding machine, grinding wheel 7 is facilitated to process.
In the 4th step, after the completion of the shank male cone (strobilus masculinus) fine grinding for verifying bar 5, the head jerk value of verification bar 5 is checked, Because head is for being installed with small grinding wheel 13 to be ground deep-hole parts, therefore the required precision of head jerk value is very high. The rotation angle of rotary table 11 is finely tuned after check according to difference, and refines the shank male cone (strobilus masculinus) of verification bar 5, until its head Until jerk value reaches pre-set tolerance requirement.
In the 5th step, due to passing through accurate adjustment of the verification bar 5 of third and fourth step to the rotation angle of rotary table 11, At this time can be directly to current workpiece, i.e., half smart embryo 3, which carries out shank male cone (strobilus masculinus), machined.Bar 5 will be verified first from rotary work It is dismantled on platform 11, rotary table 11 is then fixed on present rotation angel degree position, then first the screw thread on half 3 head of smart embryo The external screw thread 102 of hole 101 and tail portion processes, then being finished on half smart embryo 3 clamping to rotary table 11, to it Shank male cone (strobilus masculinus) carries out fine grinding.
In this way, having first passed through rotation of the verification bar 5 to grinding machine due in the shank male cone (strobilus masculinus) of the smart embryo 3 of formal processing half The rotation angle of revolving worktable 11 carries out accurate adjustment, therefore the half-and-half shank outer cone of smart embryo 3 on the rotary table 11 after accurate adjustment When face carries out fine grinding, the taper shank machining accuracy to mill bar can be greatly improved, improves mill bar processing quality qualification rate.
As shown in Fig. 2, Fig. 2 is a kind of mill bar structural schematic diagram of grinding machine with external screw thread taper shank.
In the present embodiment, 1 overall length of mill bar can be 500mm, and shank taper is 1:20, and figure midpoint A to B sections of point is outside shanks The cooperation section of the conical surface and 8 taper hole of grinding machine spindle, the length on its axial direction are about 73mm, and the rate of being bonded to each other is greater than 95%.External screw thread 102 is set at the tail end of shank, this external screw thread 102 is not more than the concentricity of shank male cone (strobilus masculinus) axial line 0.01mm.It is partially provided with recessing groove between external screw thread 102 and shank male cone (strobilus masculinus), is on the one hand to reduce the cooperation of screw thread pair Length, to avoid phenomenon is interfered;It on the other hand is to make mill bar 1 when idle, one end of tightrope convenient to use is fastened The other end of firmly this recessing groove, tightrope is then suspended on wall, allow entire mill bar 1 be suspended in the air, to avoid mill bar 1 because Force unbalance and occur bending and deformation or touch scuffing.Point C to D sections of point are plat part 1c, i.e., are symmetrical arranged on periphery flat Plane, with spanner installation convenient to use, disassembly mill bar 1, the outer circle of this section is Φ 24 in this example.Point D to E sections of point are interconnecting piece, Its length dimension mainly determines by the hole depth size of part to be processed, this example 360mm.Point F to Z sections of point are mill bar 1 Head, excircle dimension is according to the mounting hole of small grinding wheel 13 come match grinding processing, and this example is Φ 11mm, and fit clearance is less than 0.01mm。
It is provided with threaded hole 101 at the head of mill bar 1, fastens small grinding wheel 13 for installing.The aperture of threaded hole 101 has Cone angle, generally 60 °, while centre bore is offered on the end face of tail portion external screw thread 102, both it is used as benchmark when processing Hole carries out Double Tops clamping to use two top 12.The overall length of this example mill bar 1 is 500mm.
As shown in figure 3, Fig. 3 is the concrete structure schematic diagram of thick embryo 2.
For the cost of raw material for reducing mill bar 1, when frequently with steel 45 manufacture mill bar 1, but the because harden ability of steel 45 It is poor, therefore, after carrying out roughing to raw material, thick embryo 2 can be heat-treated first, for example Q-tempering is to 38 ~42HRC.
As shown in Figure 4 and Figure 5, on the basis of Fig. 4 set 6 concrete structure schematic diagram, Fig. 5 be using standard sleeve 6 to thick embryo 2 into The structural schematic diagram of row alignment.
As previously mentioned, steel 45 can be used that raw material is used as to manufacture mill bar 1, and after roughing, when being heat-treated, thick embryo 2 may deform, if the bending deformation of the thick embryo 2 in this example is 8~12mm or more.Standard sleeve 6 can be used at this time to thick Embryo 2 is straightened, wherein the inner circle of standard sleeve 6 is clearance fit with thick 2 head outer circle of embryo, and gap width is in 0~0.05mm, base The outer circle of quasi- set 6 and the shank outside diameter of thick embryo 2 are equivalent.At this point, the outer circle of standard sleeve 6 can be used as a stress support Point, and thick embryo 2 is straightened using press machine or bending machine by sheet metal worker, concentricity detection reference is alternatively arranged as to detect The concentricity of thick embryo 2, the concentricity of each outer circle on thick embryo 2 is aligned to no more than 0.5mm.
As shown in fig. 6, Fig. 6 is 7 structural schematic diagram of grinding wheel for processing grinding to thick embryo 2.
In the present embodiment, when carrying out semifinishing to thick embryo 2, thick embryo 2 can be ground by the grinding wheel 7 of pre-set dimension Cut processing.White fused alumina grinding wheel is selected in the present embodiment, the outer diameter of grinding wheel 7 is about Φ 300mm, width 20mm, granularity 46# ~60#, hardness are chosen as K-type.Before processing, groove 701 can be opened up in the outer circle central area of grinding wheel 7 in advance, to reduce Contact area between 2 periphery of grinding wheel 7 and thick embryo can achieve the purpose that reduce grinding force, reduce grinding temperature, be conducive to Reduce bending deformation degree of the thick embryo 2 in grinding.
As shown in fig. 7, the specific structure that Fig. 7 is half smart embryo 3 of headed threaded hole 101 and tail portion external screw thread 102 is illustrated Figure.
Meanwhile when carrying out semifinishing to thick embryo 2, it is necessary first to by the headstock spindle heart line of grinding machine and the tail spindle of grinding machine Heart line is adjusted to concentric, while the pressure top to two on grinding machine makees adjustment appropriate, if pressure is excessive, is easy to cause Thick embryo 2 generates biggish bending deformation in process;If pressure is too small, cause the jerk value of thick embryo 2 after processing larger. In the present embodiment, two top pressure are adjusted in 3kg or so.In the thick embryo 2 of half fine grinding, bite is controllable to 0.01mm, the amount of movement on longitudinal direction are generally every turn of 0.8~1mm.For thick embryo 2 after semifinishing, each outer circle all stays fine grinding 0.12~0.15mm of machining allowance, total run-out are not more than 0.02mm.
As shown in figure 8, Fig. 8 is the concrete structure schematic diagram for verifying bar 5.
Since the tail portion external screw thread 102 in mill bar 1 may influence to judge shank male cone (strobilus masculinus) and the internal taper hole of grinding machine spindle 8 Therefore mated condition can be used without half smart 3 structure of embryo of head threads hole 101 and tail portion external screw thread 102 as verification bar 5 Carry out cooperation verification.
As shown in Figure 9 and Figure 10, Fig. 9 is the installation and debugging schematic diagram for verifying bar 5 and grinding machine spindle 8, and Figure 10 is verification bar 5 The structural schematic diagram of fine grinding shank male cone (strobilus masculinus) on rotary table 11.
, can be temporarily by current workpiece after carrying out semifinishing to thick embryo 2 --- half smart embryo 3 is idle, then by another Half smart embryo 3 is finished in advance as verification bar 5, or preprepared verification bar 5 also can be directly used and carry out essence Processing.Certainly, it is processed according to half essence embryo 3 as verification bar 5, due to the meeting pair of external screw thread 102 on half 3 tail portion 1f of smart embryo The cooperation of itself and grinding machine spindle 8 impacts, it is therefore desirable to first half-and-half be re-used as verifying after the smart processing of embryo 3 removal external screw thread 102 Bar 5 uses.
When carrying out fine grinding to verification bar 5 or subsequent half smart embryo 3, fine grinding component mainly includes on grinding machine Fixing seat 9, axis of rotation 10, rotary table 11 and head and the tail two pieces top 12, wherein rotary table 11 can be in fixing seat 9 Upper progress is horizontal clockwise or counterclockwise, and shaft is the axis of rotation 10 being arranged in fixing seat 9.In the present embodiment, mill The shank cone angle of bar 1 can be α=2 ° 51 ' 51 ", in this way, fine grinding is carried out for convenience of the shank male cone (strobilus masculinus) to verification bar 5, it is first First need rotary table 11 horizontal α/2 jiao, i.e., 1 ° 25 ' 55 〃 or 1 ° 25 ' 56 clockwise or counterclockwise " so that school The wherein lateral edge tested in the shank male cone (strobilus masculinus) of bar 5 is horizontal longitudinal, and grinding wheel 7 is facilitated to be ground.During fine grinding, eat The control of knife amount is, no more than 0.005mm, horizontal longitudinal amount of movement is every turn of 0.5~0.8mm, and the revolving speed for verifying bar 5 is general About 50rpm.After finishing verification bar 5, the total run-out of each outer circle is no more than 0.01mm.
After being finished to verification bar 5, verification bar 5 can be assembled with grinding machine spindle 8, to pass through verification bar 5 Shank male cone (strobilus masculinus) and the inner conical surface of grinding machine spindle 8 between the machining accuracy for being bonded situation and judging male cone (strobilus masculinus), because of the male cone (strobilus masculinus) Machining accuracy seriously affect head jerk value, it is therefore desirable to the rotation angle of rotary table 11 is repeatedly finely tuned according to judging result Degree makes head jerk value meet pre-set tolerance requirement in a manner of the shank male cone (strobilus masculinus) by repeatedly refining verification bar 5.
Specifically, accurately the method for the rotation angle of adjustment rotary table 11 mainly passes through amesdial and calculating method is real It is existing, including two kinds of situations:
The first, when the shank male cone (strobilus masculinus) big end of verification bar 5 is bonded but small end has gap with the inner conical surface of grinding machine spindle 8 When, it is suitable for formula:
The rotation amount of rotary table 11 is calculated.Wherein, Δ s is the beating at table in amesdial of rotary table 11 The transverse rotation distance of (diagram dbc) position, m are that the amesdial on rotary table 11 beats at table position and axis of rotation 10 The distance set, n are the current jerk value for verifying 5 head of bar, l1To verify the head end of bar 5 to the big end of its shank male cone (strobilus masculinus) Distance.
In the present embodiment, verifying big end of the head end of bar 5 apart from shank male cone (strobilus masculinus) is l1=400mm, rotary work It is m=520mm that the amesdial of platform 11, which beats dbc positional distance axis of rotation 10 at table,.After fine grinding, the head of verification bar 5 can be measured Jerk value, such as n=0.005mm.It is calculated in this way, above three data are substituted into formula, can obtain Δ s is 0.0065mm, so It can be by the predetermined angle clockwise or counterclockwise of rotary table 11, so that the indicators turn 0.0065mm of amesdial.
Second, when the shank male cone (strobilus masculinus) small end of verification bar 5 is bonded but big end has gap with the inner conical surface of grinding machine spindle 8 When, it is suitable for formula:
The rotation amount of rotary table 11 is calculated.Wherein, Δ s is the beating at table in amesdial of rotary table 11 The transverse rotation distance of (diagram dbc) position, m are that the amesdial on rotary table 11 beats at table position and axis of rotation 10 The distance set, n are the current jerk value for verifying 5 head of bar, l2To verify the head end of bar 5 to the small end of its shank male cone (strobilus masculinus) Distance.
In the present embodiment, verifying small end of the head end of bar 5 apart from shank male cone (strobilus masculinus) is l2=473mm, rotary work It is m=520mm that the amesdial of platform 11, which beats dbc positional distance axis of rotation 10 at table,.After fine grinding, the head of verification bar 5 can be measured Jerk value, such as n=0.005mm.It is calculated in this way, above three data are substituted into formula, can obtain Δ s is 0.0055mm, so It can be by the predetermined angle clockwise or counterclockwise of rotary table 11, so that the indicators turn 0.0055mm of amesdial.
To rotary table 11 carry out rotary angle position accurate adjustment after, can again to verification bar 5 shank male cone (strobilus masculinus) into Row fine grinding, so that the head jerk value of verification bar 5 levels off to zero.After the completion of fine grinding, verification bar 5 can be installed to mill It is debugged on bed main shaft 8, if the head jerk value of verification bar 5 is still unsatisfactory for pre-set tolerance requirement, (general requirement is less than 0.002mm), then it must recalculate and be verified again such as one of aforementioned two methods.Again to verification bar 5 shank outside After the conical surface carries out fine grinding, continue installation and debugging, is until the head jerk value of verification bar 5 reaches pre-set tolerance requirement Only.
As shown in Figure 11,12,13, Figure 11 is the installation and debugging schematic diagram of smart embryo 4 and grinding machine spindle 8, and Figure 12 is smart embryo 4 The mounting structure schematic diagram on head and small grinding wheel 13, Figure 13 are the structural schematic diagram that elongated hole type parts are processed by mill bar 1.
Verification bar 5 is carried out after being accurately ground verification qualification by above-mentioned, the angle value of rotary table 11 must be protected It holds constant, verification bar 5 can be disassembled from rotary table 11 later, and half-and-half the shank male cone (strobilus masculinus) of smart embryo 3 carries out Accurate processing.Certainly, before the shank male cone (strobilus masculinus) of the smart embryo 3 of fine grinding half, head threads hole 101 and tail should be finished first Portion's external screw thread 102, control tail portion external screw thread 102 are all not more than 0.01mm to the concentricity of each outer circle.
Theoretically, the head jerk value of the smart embryo 4 after fine grinding can be controlled in 0~0.002mm, still, if smart embryo 4 Head jerk value be greater than 0.002mm when, then can by it is aforementioned to verification bar 5 carry out installation and debugging in the way of re-start rotation The fine tuning of workbench 11 and fine grinding, control until 0~0.002mm until by the head jerk value of smart embryo 4.
It, then can be in its head rigging screw 14, small grinding wheel after the head jerk value of smart embryo 4 meets pre-set tolerance requirement 13 and washer 15.At this point, diamond can be used to be modified small grinding wheel 13, the jerk value of small 13 outer circle of grinding wheel is controlled 0 After~0.002mm, the deep hole of the product parts such as machining piston bar or pressurized strut can be carried out using mill bar 1.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (7)

1. a kind of mill bar processing technology of grinding machine with external screw thread taper shank characterized by comprising
Solid raw material is taken to carry out roughing, to form the thick embryo of pre-set dimension, the thick embryo includes head, interconnecting piece, shank The tail portion and;
Semifinishing is carried out to the thick embryo, with form pre-set dimension half smart embryo, the half smart embryo includes the head being in the form of a column And tail portion, interconnecting piece and shank in cone rod shape;
By on verification bar clamping to the rotary table of grinding machine, the rotary table is made to rotate horizontally α/2 jiao along preset direction, And the shank male cone (strobilus masculinus) of bar is verified described in fine grinding;Wherein, α is the cone angle of the shank of described half smart embryo, the verification bar Shape is identical as described half smart embryo;
The head jerk value for checking the verification bar, to finely tune the rotation angle of the rotary table accordingly, and is refined again Shank male cone (strobilus masculinus) to its head jerk value of the verification bar reaches pre-set tolerance requirement;
It dismantles and the rotary table is fixed on present rotation angel degree position after the verification bar, and described half smart embryo is carried out Finishing, to form the threaded hole on its head and the external screw thread of tail portion, then will the half essence embryo clamping to the rotary table On, and fine grinding is carried out to the male cone (strobilus masculinus) of its shank.
2. mill bar processing technology of the grinding machine according to claim 1 with external screw thread taper shank, which is characterized in that in roughing Later and before progress semifinishing, further includes:
The thick embryo is heat-treated, to reach default hardness requirement.
3. mill bar processing technology of the grinding machine according to claim 2 with external screw thread taper shank, which is characterized in that described thick After embryo is heat-treated and before progress semifinishing, further includes:
The thick embryo is straightened, so that the concentricity of its each cross section meets pre-set tolerance requirement.
4. mill bar processing technology of the grinding machine according to claim 3 with external screw thread taper shank, which is characterized in that described thick Embryo is straightened, and is specifically included:
Clearance fit is formed by the head of preset standard sleeve and the thick embryo;
Benchmark is detected using the outer circle of the standard sleeve as the maximum outer circle and concentricity of the thick embryo, and passes through alignment instrument school The straight thick embryo.
5. mill bar processing technology of the grinding machine according to claim 4 with external screw thread taper shank, which is characterized in that described thick When embryo carries out semifinishing, the half smart embryo further includes being connected between the interconnecting piece and the shank, being used for and dismounting work Has the plat part of cooperation, and the diameter of the plat part is equal with the outside diameter of the interconnecting piece and the shank.
6. mill bar processing technology of the grinding machine according to claim 5 with external screw thread taper shank, which is characterized in that described thick When embryo carries out semifinishing, grinding is carried out to the thick embryo by the grinding wheel of pre-set dimension, and in the outer circle of the grinding wheel Heart district domain offers the groove for reducing contact area.
7. mill bar processing technology of the grinding machine according to claim 1-6 with external screw thread taper shank, which is characterized in that The rotation angle for finely tuning the rotary table, specifically includes:
The inner conical surface of the shank male cone (strobilus masculinus) of the verification bar and grinding machine spindle is assembled, and judges the close feelings of fitting of the two Condition;
When it is described verification bar shank male cone (strobilus masculinus) big end regions be bonded with the inner conical surface of the grinding machine spindle and small end regions and The inner conical surface of the grinding machine spindle passes through formula there are when gap:
The rotation amount of the rotary table is calculated, and the rotary table is rotated with this;
When it is described verification bar shank male cone (strobilus masculinus) small end regions be bonded with the inner conical surface of the grinding machine spindle and greatly end regions and The inner conical surface of the grinding machine spindle passes through formula there are when gap:
The rotation amount of the rotary table is calculated, and the rotary table is rotated with this;
Wherein, Δ s is the transverse rotation distance of beating table at position of the rotary table in amesdial, and m is the rotation work Make the amesdial on platform and beat at table position at a distance from the axis of rotation position of the rotary table, n is the verification head The current jerk value in portion, l1Big end distance for the head end for verifying bar to its shank male cone (strobilus masculinus), l2For the verification bar Head end to its shank male cone (strobilus masculinus) small end distance.
CN201910764873.2A 2019-08-19 2019-08-19 Grinding rod machining process with externally threaded taper shank for grinding machine Active CN110369971B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910764873.2A CN110369971B (en) 2019-08-19 2019-08-19 Grinding rod machining process with externally threaded taper shank for grinding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910764873.2A CN110369971B (en) 2019-08-19 2019-08-19 Grinding rod machining process with externally threaded taper shank for grinding machine

Publications (2)

Publication Number Publication Date
CN110369971A true CN110369971A (en) 2019-10-25
CN110369971B CN110369971B (en) 2021-04-20

Family

ID=68259839

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910764873.2A Active CN110369971B (en) 2019-08-19 2019-08-19 Grinding rod machining process with externally threaded taper shank for grinding machine

Country Status (1)

Country Link
CN (1) CN110369971B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010025420A1 (en) * 2000-03-31 2001-10-04 Motonori Usui Working tool for manufacturing bearing member, manufacturing apparatus incorporating the same and manufacturing method using the same
CN102528412A (en) * 2011-11-29 2012-07-04 北京景年科技有限公司 Processing method and detection method of special mechanical structure
CN102922227A (en) * 2012-08-28 2013-02-13 沈阳黎明航空发动机(集团)有限责任公司 Processing method for titanium alloy inclined plane step holes
CN103273282A (en) * 2013-06-20 2013-09-04 贵州红林机械有限公司 Method for machining high-accuracy special profile of elongated rod
DE102015209745A1 (en) * 2015-05-28 2016-12-01 MTU Aero Engines AG Process for producing a Tl blisk
CN106271448A (en) * 2016-08-31 2017-01-04 中国航天科技集团公司烽火机械厂 A kind of long mill bar processing method
CN108637612A (en) * 2018-05-16 2018-10-12 遵义市遵云制冷配件有限公司 A kind of processing technology of aero-engine piston

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010025420A1 (en) * 2000-03-31 2001-10-04 Motonori Usui Working tool for manufacturing bearing member, manufacturing apparatus incorporating the same and manufacturing method using the same
CN102528412A (en) * 2011-11-29 2012-07-04 北京景年科技有限公司 Processing method and detection method of special mechanical structure
CN102922227A (en) * 2012-08-28 2013-02-13 沈阳黎明航空发动机(集团)有限责任公司 Processing method for titanium alloy inclined plane step holes
CN103273282A (en) * 2013-06-20 2013-09-04 贵州红林机械有限公司 Method for machining high-accuracy special profile of elongated rod
DE102015209745A1 (en) * 2015-05-28 2016-12-01 MTU Aero Engines AG Process for producing a Tl blisk
CN106271448A (en) * 2016-08-31 2017-01-04 中国航天科技集团公司烽火机械厂 A kind of long mill bar processing method
CN108637612A (en) * 2018-05-16 2018-10-12 遵义市遵云制冷配件有限公司 A kind of processing technology of aero-engine piston

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈丽荣: "细长接磨杆加工工艺的改进", 《装备维修技术》 *

Also Published As

Publication number Publication date
CN110369971B (en) 2021-04-20

Similar Documents

Publication Publication Date Title
EP2110204B1 (en) Method for honing bores and honing tool therefor
EP1696289B1 (en) Method for gauging a machine tool
DE102006009422B4 (en) Device for checking the accuracy of a circular path to be executed by a work spindle
TWI233854B (en) Tool holder
DE102007009843B4 (en) Method for grinding a machine component and grinding machine for carrying out the method
EP1193028B1 (en) Method for measuring work portion and machining method
EP1907156B1 (en) Method for fine-machining crankshafts and machining centre therefor
DE102014104170A1 (en) Numerically controlled machine tool and spindle error compensation method for this purpose
DE102007026562B4 (en) Grinding center and method for simultaneously grinding multiple bearings of crankshafts
DE102007034706B3 (en) Grinding center and method for simultaneous grinding of multiple bearings and end faces of crankshafts
EP1843871B1 (en) Friction stir welding tool
CN201735864U (en) Outfit for processing precise indexing inner wall hole of large annular workpiece
CN201702601U (en) Adjustable eccentric fixture for engine lathe
EP2538189B1 (en) Power measurement casing and power measurement method
DE202016004284U1 (en) Grinding machine for grinding a profile
CN102825515B (en) Machining method of high-accuracy cutter shaft of rotary shear
DE10322762B4 (en) Holder for a blank and method for measuring the position and orientation of the holder
EP2040881A1 (en) Method for machining that combines fine boring and honing and machining equipment for the execution of the method
US2833544A (en) Compensating tool holder
CN103737267B (en) A kind of processing method of end face tooth super-long joint shaft
CN104894357B (en) A kind of method for preventing U-shaped gear part machining deformation and support calibration tool
CN202539614U (en) Double-taper sleeve split adjustable turning and grinding mandrel device
EP2476510A2 (en) Method for combined fine drilling and honing as well as processing assembly for performing the method
EP1964632B1 (en) Method and apparatus to secure a component in position for fabrication
CN103341789B (en) Sensor position adjusting device for spindle rotation error detection

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant