CN118094808A - Calculation method of C-shaped claw design parameters - Google Patents

Abstract

The invention provides a calculation method of C-shaped claw design parameters, which comprises the steps of obtaining a plurality of determined workpiece drawings, finding out a plurality of influence parameters in C-shaped claws corresponding to the workpiece drawings, and respectively deducing the influence parameters in each C-shaped claw to obtain a calculation formula; analyzing a preset workpiece drawing, matching at least one calculation formula corresponding to the preset workpiece drawing, inputting target parameters in the preset workpiece drawing into the calculation formula for calculation, and obtaining a plurality of parameter data in the C-shaped claw corresponding to the preset workpiece drawing. The method for calculating the C-shaped claw design parameters adopts strict logic analysis and deduction to form a calculation formula, and deduces the parameters by using the calculation formula, so that the method belongs to an error-free design in actual conditions, gets rid of experience dependence and calculation errors of designers, and greatly improves the design precision and design efficiency of the C-shaped claw.

Description

Calculation method of C-shaped claw design parameters

Technical Field

The invention relates to the technical field of gear machining, in particular to a calculation method of design parameters of a C-shaped claw.

Background

Hard turning and turning are common finishing procedures for gear machining, and common key equipment comprises a high-efficiency and high-precision numerical control lathe, a chuck, clamping jaws and the like, so that the high-precision machining requirements of the characteristics of various products of the diameter, the length, the runout and the surface finish of a gear are guaranteed, and most of the clamping jaws are C-shaped clamping jaws in the application of the lathe, the C-shaped clamping jaws have good rigidity, simple structure, reliability and durability, however, the C-shaped clamping jaws are frequently switched, because the structural parameters such as the shape, the size and the distribution of a clamping pin and a guide pin of the C-shaped clamping jaws need to be matched and designed in a targeted manner according to different workpieces, if the sizes are not matched, or the shape and position precision is not good, the clamping rigidity is poor, vibration is easy to generate, the dimension precision and the surface quality of the workpieces are influenced, the roughness, the roundness and the cylindricity are difficult to guarantee, or the runout of the gear is difficult to cause the risk of the workpiece to be removed.

At present, the C-shaped claw design parameter is generally three-dimensional approximate design and manual calculation, and in actual conditions, the first workpiece is required to be three-dimensionally modeled according to the workpiece drawing; then, carrying out three-dimensional design on the clamping jaw, the clamping pin and the guide pin, and making tangential line construction on the intersection point of the minute circle and the tooth surface to form the wedge angle side surface of the clamping pin, and adjusting the wedge angle and the cutting edge swing angle of the clamping pin according to the empirical value; the clamping jaw, the clamping pin and the guide pin are converted into two-dimensional drawings in a three-dimensional mode, and design parameters of the clamping jaw and the clamping pin are marked; the clamping jaw, the clamping pin and the guide pin are subjected to trial cutting and inspection, if the clamping jaw, the clamping pin and the guide pin are not qualified, the trial cutting is performed again according to the drawing, and if the clamping jaw, the clamping pin and the guide pin are qualified, trial verification is performed; if the trial verification is qualified, solidifying the drawing, otherwise, checking and modifying the three-dimensional modeling and modifying the drawing design are needed.

The existing method for determining the design parameters of the C-shaped clamping jaw is rough, subjective judgment is needed to rely on experience of engineers, the reasonable cutting depth and swing angle of the clamping pin are difficult to determine in practice, the whole process is complex, tedious and time-consuming, meanwhile, the circumferential distribution angles of the clamping pin and the guide pin are calculated manually, the axial distance and the gear rotation direction of the clamping pin and the guide pin are required to be considered, the calculation is complex, and errors are easy to occur, so that the precision of various parameters of the C-shaped clamping jaw is difficult to ensure, and the drawing design can be solidified only by carrying out multi-round design adjustment, trial cutting and trial verification.

Disclosure of Invention

Based on the above, the invention aims to provide a calculation method of C-shaped claw design parameters, so as to solve the technical problems that the precision of calculating various parameters of the C-shaped claw is difficult to guarantee by the existing calculation method in the background technology, and the drawing design can be solidified only by carrying out multi-round design adjustment, trial cutting and trial verification.

The method comprises the steps of obtaining a plurality of determined workpiece drawings, finding out a plurality of influence parameters in C-shaped claws corresponding to the workpiece drawings, and respectively deducing the influence parameters in each C-shaped claw to obtain a calculation formula corresponding to each C-shaped claw;

Analyzing a preset workpiece drawing, matching at least one calculation formula corresponding to the preset workpiece drawing, inputting target parameters in the preset workpiece drawing into the calculation formula for calculation, and obtaining a plurality of parameter data in a C-shaped claw corresponding to the preset workpiece drawing, wherein the plurality of parameter data at least comprise clamping pin parameters and guide pin parameters;

corresponding parameter labeling is carried out on the clamping pin parameters and the guide pin parameters in the process of drawing a preset workpiece;

Checking whether the parameter labeling result is qualified or not;

And if the parameter labeling result is qualified, determining that the current clamping pin parameter and the guide pin parameter are deterministic parameters affecting the C-shaped claw.

And if the parameter labeling result is not qualified, returning to the step of analyzing the preset workpiece drawing until the parameter labeling result is qualified.

In addition, the method for calculating the design parameters of the C-shaped claw according to the above embodiment of the present invention may further have the following additional technical features:

Further, in the step of acquiring a plurality of determined workpiece drawings and finding a plurality of influencing parameters in the C-shaped claw corresponding to the plurality of workpiece drawings, the method further comprises,

The workpiece drawing at least comprises a first sub-workpiece drawing and a second sub-workpiece drawing;

Deducing according to a plurality of influence parameters in the corresponding C-shaped claw in the first sub-workpiece drawing to obtain a first set of C-shaped claw calculation formula corresponding to the first sub-workpiece drawing;

Deducing according to a plurality of influence parameters in the corresponding C-shaped claw in the second sub-workpiece drawing to obtain a second set of C-shaped claw calculation formula corresponding to the second sub-workpiece drawing;

the plurality of influence parameters in the corresponding C-shaped claws in the first sub-workpiece drawing are not equal to the plurality of influence parameters in the corresponding C-shaped claws in the second sub-workpiece drawing.

Further, the step of analyzing the preset workpiece drawing and matching at least one calculation formula corresponding to the preset workpiece drawing comprises,

When the preset workpiece drawing is analyzed and a calculation formula corresponding to the preset workpiece drawing is matched to be a first set of C-shaped claw calculation formula;

Inputting the wedge angle parameter of the clamping pin and the first tooth part parameter into a first set of C-shaped claw calculation formula to calculate the clamping pin parameter;

and inputting the second tooth part parameter, the axial distance parameter of the clamping pin and the guide pin and the deflection angle cross-tooth number data parameter into a first set of C-shaped claw calculation formula to calculate the distribution angle parameter of the clamping pin and the guide pin.

Further, the step of analyzing the preset workpiece drawing and matching at least one calculation formula corresponding to the preset workpiece drawing comprises,

When the preset workpiece drawing is analyzed and a calculation formula corresponding to the preset workpiece drawing is matched to be a second set of C-shaped claw calculation formula;

Inputting the wedge angle half angle parameters, the normal pressure angle parameters and the first tooth part parameters of the clamping pin of the left tooth surface and the right tooth surface into a second set of C-shaped claw calculation formulas to calculate the design parameters of the left surface and the right surface of the clamping pin;

and inputting the second tooth part parameter, the axial distance parameter of the clamping pin and the guide pin and the deflection angle cross-tooth number data parameter into a first set of C-shaped claw calculation formula to calculate the distribution angle parameter of the clamping pin and the guide pin.

Further, the first tooth part parameters at least comprise a tooth number parameter, a normal modulus parameter, a normal pressure angle parameter, a circle separation helix angle parameter and a ball gauge parameter;

the second tooth part parameters at least comprise a tooth number parameter, a normal modulus parameter, a circular helix angle parameter and a spiral direction parameter.

Further, the distribution angle parameters of the clamping pin and the guide pin at least comprise a tooth surface contact point diameter parameter, a tooth surface contact point helix angle parameter, a clamping pin contact point brown thickness and a distance parameter from the center of the hole.

Further, the distribution angle parameters of the clamping pin and the guide pin at least comprise a left deflection parameter, a right deflection parameter and an included angle parameter.

Compared with the prior art: according to the calculation method of the C-shaped claw design parameters, a plurality of influence parameters in the C-shaped claws corresponding to the plurality of workpiece drawings are found by acquiring the plurality of determined workpiece drawings, and the influence parameters in each C-shaped claw are respectively deduced to obtain a calculation formula corresponding to each C-shaped claw; analyzing a preset workpiece drawing, matching at least one calculation formula corresponding to the preset workpiece drawing, inputting target parameters in the preset workpiece drawing into the calculation formula for calculation, and obtaining a plurality of parameter data in the C-shaped claw corresponding to the preset workpiece drawing, wherein the plurality of parameter data at least comprise clamping pin parameters and guide pin parameters; corresponding parameter labeling is carried out on the clamping pin parameters and the guide pin parameters in the process of presetting a workpiece drawing, and inspection is carried out; if the test is qualified, the current parameters of the clamping pin and the guide pin are the certainty parameters affecting the C-shaped claw, and the calculation method of the design parameters of the C-shaped claw adopts strict logic analysis and deduction to form a calculation formula, and deduces the parameters by using the calculation formula, so that the design method belongs to an error-free design, gets rid of the experience dependence and calculation errors of designers, greatly improves the design precision and the design efficiency of the C-shaped claw, saves the verification requirement of the parameter calculation design, and solves the technical problem that the precision of various parameters of the C-shaped claw calculated in the prior art is difficult to ensure, and the design of a drawing can be solidified only by carrying out multi-round design adjustment, trial cutting and trial verification.

Drawings

FIG. 1 is a flowchart of a method of calculating design parameters for a C-shaped jaw in a first embodiment of the invention;

FIG. 2 is a schematic view of the structure of the C-shaped claw in the first embodiment of the invention;

FIG. 3 is an assembly view of a guide pin, a clamp pin and a workpiece in a first embodiment of the invention;

FIG. 4 is a D-D cross-sectional view of FIG. 2 when the workpiece is calculated using a first set of C-type jaw calculation formulas;

FIG. 5 is a cross-sectional E-E view of FIG. 4 when the workpiece is calculated using a first set of C-type jaw calculation formulas;

FIG. 6 is a D-D cross-sectional view of FIG. 2 when the workpiece is calculated using a second set of C-type jaw calculation formulas;

FIG. 7 is a cross-sectional E-E view of FIG. 4 when the workpiece is calculated using a second set of C-type jaw calculation formulas;

FIG. 8 is a formula development;

FIG. 9 is a parameter derivation diagram;

fig. 10 is a practical parameter diagram of the fourth gear in the first embodiment.

The following detailed description will further illustrate the invention with reference to the above-described drawings.

Reference numerals illustrate:

10. A clamp pin; 20. and a guide pin.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

First embodiment

Referring to fig. 1, a method for calculating design parameters of a C-shaped claw according to a first embodiment of the present invention is shown, and the calculating method specifically includes steps S01-S05.

Step S01, a plurality of determined workpiece drawings are obtained, a plurality of influence parameters in C-shaped claws corresponding to the workpiece drawings are found, and the influence parameters in each C-shaped claw are respectively deduced to obtain a calculation formula corresponding to each C-shaped claw.

In this embodiment, the determined workpiece drawing belongs to a workpiece determined in an actual situation, and the parameters thereof are deterministic parameters, that is, a plurality of influencing parameters on a C-shaped claw for processing the workpiece are determined parameters, and deducing is performed according to the determined parameters, so as to obtain a calculation formula corresponding to each C-shaped claw.

It should be noted that, referring to fig. 2-5, a specific structure of a C-shaped claw is shown, where the C-shaped claw is formed by three sets of components, each set of components corresponds to at least one clamping pin 10 and guide pins 20 disposed on two sides of the clamping pin 10.

Step S02, analyzing a preset workpiece drawing, matching at least one calculation formula corresponding to the preset workpiece drawing, inputting target parameters in the preset workpiece drawing into the calculation formula for calculation, and obtaining a plurality of parameter data in the C-shaped claw corresponding to the preset workpiece drawing, wherein the plurality of parameter data at least comprise clamping pin parameters and guide pin parameters.

Specifically, a preset workpiece drawing is a workpiece to be processed, and a corresponding C-shaped claw is required to be designed;

in some preferred embodiments, the workpiece drawings include at least a first sub-workpiece drawing and a second sub-workpiece drawing;

Deducing according to a plurality of influence parameters in the corresponding C-shaped claw in the first sub-workpiece drawing to obtain a first set of C-shaped claw calculation formula corresponding to the first sub-workpiece drawing;

Deducing according to a plurality of influence parameters in the corresponding C-shaped claw in the second sub-workpiece drawing to obtain a second set of C-shaped claw calculation formula corresponding to the second sub-workpiece drawing;

the method comprises the steps that a plurality of influence parameters in corresponding C-shaped claws in a first sub-workpiece drawing are not equal to a plurality of influence parameters in corresponding C-shaped claws in a second sub-workpiece drawing.

Analyzing the preset workpiece drawing, and matching at least one calculation formula corresponding to the preset workpiece drawing, wherein the step of analyzing the preset workpiece drawing comprises the following steps:

When a preset workpiece drawing is analyzed and a calculation formula corresponding to the preset workpiece drawing is matched as a first set of C-shaped claw calculation formula;

Inputting the wedge angle parameter of the clamping pin and the first tooth part parameter into a first set of C-shaped claw calculation formula to calculate the clamping pin parameter;

and inputting the second tooth part parameter, the axial distance parameter of the clamping pin and the guide pin and the deflection angle cross-tooth number data parameter into a first set of C-shaped claw calculation formula to calculate the distribution angle parameter of the clamping pin and the guide pin.

The first tooth part parameters at least comprise a tooth number parameter, a normal modulus parameter, a normal pressure angle parameter, a circle division helix angle parameter and a ball gauge parameter.

The second tooth part parameters at least comprise a tooth number parameter, a normal modulus parameter, a circular helix angle parameter and a spiral direction parameter.

The distribution angle parameters of the clamping pin and the guide pin at least comprise a tooth surface contact point diameter parameter, a tooth surface contact point helix angle parameter, a clamping pin contact point brown thickness and a hole center distance parameter.

When the preset workpiece drawing is analyzed and a calculation formula corresponding to the preset workpiece drawing is matched as a second set of C-shaped claw calculation formula;

Inputting the wedge angle half angle parameters, the normal pressure angle parameters and the first tooth part parameters of the clamping pin of the left tooth surface and the right tooth surface into a second set of C-shaped claw calculation formulas to calculate the design parameters of the left surface and the right surface of the clamping pin;

and inputting the second tooth part parameter, the axial distance parameter of the clamping pin and the guide pin and the deflection angle cross-tooth number data parameter into a first set of C-shaped claw calculation formula to calculate the distribution angle parameter of the clamping pin and the guide pin.

The distribution angle parameters of the clamping pins and the guide pins at least comprise left deflection parameters, right deflection parameters and included angle parameters.

It should be noted that, the first tooth parameter and the second tooth parameter in the second set of C-shaped claw calculation formula are consistent with the first tooth parameter and the second tooth parameter in the first set of C-shaped claw calculation formula, that is, the first tooth parameter at least includes a tooth number parameter, a normal modulus parameter, a normal pressure angle parameter, a circle dividing helix angle parameter, and a ball gauge parameter, and the second tooth parameter at least includes a tooth number parameter, a normal modulus parameter, a circle dividing helix angle parameter, and a rotation direction parameter.

Specifically, to facilitate understanding of the present disclosure, examples will now be described.

And analyzing a preset workpiece drawing, wherein the workpiece is a gear, the required workpiece structure and tooth parameters are confirmed to be complete and effective, and the C-shaped claw design requirement is confirmed.

Selecting different calculation formulas, namely a first set of C-shaped claw calculation formulas and a second set of C-shaped claw calculation formulas according to the tooth parts of the gears;

When the left and right tooth surface pressure angles of the tooth parts are consistent, the tooth is a common tooth, and corresponds to a first set of C-shaped claw calculation formula, and when the left and right tooth surface pressure angles of the tooth parts are different, the tooth is an asymmetric tooth, and corresponds to a second set of C-shaped claw calculation formula.

For the convenience of understanding, taking a four-gear as an example, the number of teeth 39, the modulus 1.84, the pressure angle 18 degrees, the helix angle 33 degrees (right), the M value 90.876 (measuring ball 3.5) of the workpiece, and the distance between the clamping pin and the guide pin is 5, and a corresponding C-shaped claw needs to be designed.

First kind

Referring to fig. 2-5, when the pressure angles of the left and right tooth surfaces of the tooth part are consistent, the tooth part is a common tooth, and the first set of C-shaped claw calculation formula is corresponding, in addition, the basic theory of the gear needs to be additionally referenced; namely, the expression of the pressure angle of the end face of the minute circle is: at=atan (tan (αn)/cos (β)); wherein, at is the pressure angle of the end face of the minute circle, and an and beta are the normal pressure angle of the minute circle and the helix angle of the minute circle respectively; the modulus expression of the rounding end face is as follows: in the expression mt=mn/cos (beta), mt is a rounding end face modulus, and mn is a rounding normal modulus; the displacement coefficient expression is xn= (invaMt- (invat +dm/(z×mn) cos (an)) -pi/(2*z))) z/(2×tan (an));

wherein: invat = tan (at) -at; invaMt = tan (aMt) -aMt;

for odd teeth, aMt = acos (mt×z×cos (at) ×cos (90/z)/(Mdk-dm));

If even teeth, aMt = acos (mt×z×cos (at)/(Mdk-dm));

Wherein xn is a deflection coefficient, aMt, mdk, dm, pi, invat and invat are respectively the pressure angle of the central end face of the measuring ball, the distance of the measuring ball, the diameter of the measuring ball, the circumference ratio, the pressure angle function of the end face of the dividing circle and the pressure angle function of the central end face of the measuring ball.

The following formula is a special calculation formula deduced by the calculation method of the C claw design parameter, and the sequence numbers are marked:

it should be noted that, for the convenience of understanding the derivation logic of the formula in this disclosure, please refer to fig. 8, specifically:

the pitch circle normal pressure angle expression is:

αnk＝αk/2；(1)

Wherein, alpha nk is the normal pressure angle of the pitch circle, and alpha k is the wedge angle of the clamping pin;

the pitch angle expression for pitch circles is:

αnk＝atan(tan(acos(tan(β)*cos(atan(tan(αn)/cos(β)))/tan(βk)))*cos(βk))；(2)

wherein alpha nk is the normal pressure angle of the pitch circle, and beta k is the pitch angle of the pitch circle;

The calculation method comprises the following steps: given the desired clamp pin wedge angle αk, and the pitch circle normal pressure angle αnk determined by equation (1), βk is determined by iterative calculations from equation (2).

The pitch circle normal modulus mnk is expressed as:

mnk＝mn*sin(βk)/sin(β)；(3)

wherein mnk is the normal modulus of the pitch circle, and mn is the normal modulus;

The pitch diameter dk is expressed as:

dk＝z*mnk/cos(βk)；(4)

Wherein dk is the diameter of the pitch circle and z is the number of teeth;

the pitch circle normal arc tooth slot width enk has the expression:

enk＝dk/z*(π/2-2*xn*tan(αn)+z*(tan(acos(mt*z*cos(αt)/dk))-acos(mt*z*cos(αt)/

dk)-tan(αt)+αt))*cos(βk)；(5)

Wherein enk is pitch circle normal arc tooth groove width, xn and mt are deflection coefficients and end face modulus;

The node clamping pin brown thickness expression is:

Tek＝enk；(6)

The contact thickness expression is:

Tec＝Tek*pow(cos(αnk),2.0)；

i.e. tec= enk x pow (cos (αnk), 2.0) (7)

The contact-point brown-thick distance center expression is:

Thec＝z*mnk/cos(βk)/2-enk*sin(2*αnk)/4；(8)

The contact point diameter expression is:

dc＝2*pow(pow(Tec/2,2.0)+pow(Thec,2),0.5)；(9)

The contact point helix angle/clamp pin wedge pivot angle expression is:

βc＝atan(dc*tan(β)/(mn*Z/COS(β)))；(10)

the clamp pin is marked with the following expression:

tem=tec+2 (Them-Thec) Tan (ak/2); (11) In the method, tem is the thickness of the clamping pin, them is the thickness of the clamping pin, and the thickness is the distance from the center of the hole;

calculating the distribution angles of the clamping claw clamping pins and the guide pins;

The calculation formula derivation logic is shown in fig. 9.

The left-hand corner expression is:

Left-handed: γ1=360/z×z1-h×tan (β)/Z/mt/pi×360; (12)

Generally taking the cross-tooth number z1=2;

or right-hand rotation: γ1=360/Z z1+h tan (β)/Z/mt/pi 360; (13)

Generally taking the cross-tooth number z1=1;

wherein gamma 1 is the left deflection angle, and the axial distance between the H clamping pin and the guide pin;

The right-hand corner expression is:

left-handed: γ2=360/Z z2+h tan (β)/Z/mt/pi 360; (14)

Generally taking the cross-tooth number z2=1;

or right-hand rotation: γ2=360/z×z2-h×tan (β)/Z/mt/pi×360; (15)

Generally taking the cross-tooth number z2=2;

The guide pin included angle expression is:

θ＝ROUND(Z/3,0)*360/Z-γ1-γ2；(16)

Second kind

Referring to fig. 6-7, when the left and right tooth surface pressure angles of the tooth parts are different, the tooth is an asymmetric tooth, corresponding to a second set of C-shaped claw calculation formula.

Calculating design parameters of the clamping pin:

I, respectively calculating and determining wedge angle a of a left clamping pin and a right clamping pin, tooth surface contact point diameter dc of the clamping pin, contact point helix angle beta c, contact point brown thickness Tec and center distance Thec from brown thickness to hole according to common teeth:

II, half tooth wedge angles alpha k1 and alpha k2 of the right and left tooth surfaces and half tooth thicknesses Tec1 and Tec2 of the left and right contact points of the clamping pin are half of the calculated values in the step I;

III, right and left tooth surface contact point diameters dc1, dc2, contact point helix angles betac 1, betac 2, and left and right contact point half-brown thickness distances of the clamping pin from hole centers Thec, thec are equal to the calculated values of step I;

IV, determining that the mark thickness of the clamping pin is equal to the thickness of the center Them of the hole;

V, calculating left and right marking half-brown thickness Tem1 and Tem2 of the clamping pin and marking total brown thickness Tem:

the clamp pin is marked with the following expression:

Tem1＝Tec1+(Them-Thec1)*tan(αk1)； (17)

In the method, tem1 is the half thickness of a left half of a clamping pin, tec1, them, thec1 and alpha k1 are half tooth thicknesses of a left contact point of the clamping pin, the center of a hole with the half thickness of the clamping pin, the center of the hole with the half thickness of the clamping pin, and a half tooth wedge angle alpha k1 of a right tooth surface;

the clamp pin is marked with the following expression:

Tem2＝Tec2+(Them-Thec2)*tan(αk2)； (18)

wherein Tem2 is the half thickness of the right half of the clamp pin, tec2, thec2 and alpha k2 are half tooth thickness of the right contact point of the clamp pin, and the half thickness of the right contact point of the clamp pin is distant from the center of the hole and the half tooth wedge angle alpha k1 of the left tooth surface;

the clamp pin is noted with the general brown thickness expression as follows:

Tem＝Tem1+Tem2； (19)

the method for calculating the distribution angle of the clamping jaw pins and the guide pins comprises the following steps:

Calculating the left deflection angle gamma 1, the right deflection angle gamma 2 and the included angle theta of the asymmetric tooth claw to be the same as those of the common tooth claw;

Referring to fig. 10, in particular to the present series of four-gear workpieces, since the pressure angles on both sides of the teeth are equal, we should choose to calculate according to the common tooth C-shaped jaw design parameter pattern. According to general experience, the wedge angle of the clamping pin is selected to be 40 degrees before calculation, the axial distance between the clamping pin and the guide pin is 5, the left offset angle spans the tooth number z1=1, and the right offset angle spans the tooth number z2=2. Inputting wedge angle of the clamping pin, tooth parameters (including tooth number, normal modulus, normal pressure angle, circle division helix angle, rotation direction, measuring ball distance and the like), axial distance between the clamping pin and the guide pin, deflection angle and cross tooth number, carrying out preliminary calculation, selecting proper clamping pin marking the center of the hole at the same time as the calculated thickness of the contact of the clamping pin and the center distance from the hole, and calculating the marking thickness of the clamping pin, thereby completing all calculation, wherein the calculation result of the C-shaped claw design parameters is shown in figure 2, and the parameters directly applied to claw design are as follows: clamping pin wedge angle αk=40°; the wedge opening swing angle of the clamping pin is beta c= 33.119 degrees; the clamp pin marks the thickness of Them = 42.948 from the center of the hole; the clamp pin is marked with a brown thickness tem=3.158; the axial distance h=5 between the clamping pin and the guide pin; left offset angle (X3) γ1= 13.579 °; right offset angle (X3) γ2= 14.113 °; the guide pin angle (x2θ= 92.308 °.

And S03, carrying out corresponding parameter labeling on the clamping pin parameters and the guide pin parameters in a preset workpiece drawing process.

And S04, checking whether the parameter labeling result is qualified or not.

If the test is qualified, executing a step S05;

if the test is not qualified, executing step S02;

Step S05, determining that the current clamping pin parameter and the guide pin parameter are deterministic parameters affecting the C-shaped jaw.

Specifically, the calculation parameters of the clamping jaw and the clamping pin are marked on a drawing, other structural parameters and material performance requirements are supplemented, the positioning seat is reasonably designed, the clamping pin and the guide pin are ensured to fall on the proper axial position of a workpiece tooth slot, and the standard part is designed. In particular to the four-gear workpiece of the present column, the parameters calculated in the step 2 are directly referenced to design the clamping jaw and the positioning seat, but the axial dimension of the marked brown thickness position marked on the clamping pin drawing is converted by marking the center of the brown thickness distance hole with the clamping pin.

Claw and clamping pin trial cut: according to the drawing, trial cutting 1 set of clamping jaws comprises a clamping jaw body, a clamping pin, a guide pin, a trial cutting positioning seat and 1 piece of standard component respectively, and the standard component is prepared and assembled;

and (3) checking: measuring all parts of the claw, measuring the positioning seat and the standard part, confirming to meet the requirements of a design drawing, and repairing the claw or reprocessing according to the drawing if the claw is not met, so as to ensure the effective subsequent trial verification;

Trial verification: mounting the clamping jaw and the positioning block on an equipment chuck, clamping and detecting the end and the diameter jump of the standard component, clamping and processing the part if the standard component is qualified, and detecting the finished part; if the detection standard component end and the diameter jump are not qualified, or the machined part is not qualified, or the process is abnormal and cannot be adjusted to a qualified range, analyzing whether the detection standard component end and the diameter jump are related to the clamping jaw, if so, adjusting parameters for recalculating, or adjusting other structural parameters and material requirements, modifying a drawing, repairing the clamping jaw or reprocessing;

curing the drawing: and if the trial verification is qualified, solidifying the design drawing.

It is noted that since the calculation is a derived formula calculation and the calculation of the C-jaw design parameters is accurate and has no uncertainty associated with the designer by using a spreadsheet or a calculation program, the trial cut, test, and trial verification are also substantially independent thereof, mainly one verification for other design parameters or manufacturing accuracy, and further, the loop design compensation verification associated with the approximate design is not required. Therefore, compared with the prior art, the calculation method of the C claw design parameter greatly improves the rationality and reliability of the C claw design, reduces the process experience requirements of engineers, saves the cycle verification requirements of the C claw parameter design, and shortens the process verification time and cost of the whole product.

In summary, compared with the prior art, the method for calculating the design parameters of the C-shaped claw in the above embodiment of the present invention finds a plurality of influence parameters in the C-shaped claw corresponding to a plurality of workpiece drawings by obtaining a plurality of determined workpiece drawings, and derives the plurality of influence parameters in each C-shaped claw to obtain a calculation formula corresponding to each C-shaped claw; analyzing a preset workpiece drawing, matching at least one calculation formula corresponding to the preset workpiece drawing, inputting target parameters in the preset workpiece drawing into the calculation formula for calculation, and obtaining a plurality of parameter data in the C-shaped claw corresponding to the preset workpiece drawing, wherein the plurality of parameter data at least comprise clamping pin parameters and guide pin parameters; corresponding parameter labeling is carried out on the clamping pin parameters and the guide pin parameters in the process of presetting a workpiece drawing, and inspection is carried out; if the test is qualified, the current parameters of the clamping pin and the guide pin are the certainty parameters affecting the C-shaped claw, and the calculation method of the design parameters of the C-shaped claw adopts strict logic analysis and deduction to form a calculation formula, and deduces the parameters by using the calculation formula, so that the design method belongs to an error-free design, gets rid of the experience dependence and calculation errors of designers, greatly improves the design precision and the design efficiency of the C-shaped claw, saves the verification requirement of the parameter calculation design, and solves the technical problem that the precision of various parameters of the C-shaped claw calculated in the prior art is difficult to ensure, and the design of a drawing can be solidified only by carrying out multi-round design adjustment, trial cutting and trial verification.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (7)

1. A method for calculating design parameters of a C-shaped claw, the method comprising:

Acquiring a plurality of determined workpiece drawings, finding out a plurality of influence parameters in C-shaped claws corresponding to the workpiece drawings, and respectively deducing the influence parameters in each C-shaped claw to obtain a calculation formula corresponding to each C-shaped claw;

Analyzing a preset workpiece drawing, matching at least one calculation formula corresponding to the preset workpiece drawing, inputting target parameters in the preset workpiece drawing into the calculation formula for calculation, and obtaining a plurality of parameter data in a C-shaped claw corresponding to the preset workpiece drawing, wherein the plurality of parameter data at least comprise clamping pin parameters and guide pin parameters;

corresponding parameter labeling is carried out on the clamping pin parameters and the guide pin parameters in the process of drawing a preset workpiece;

Checking whether the parameter labeling result is qualified or not;

And if the parameter labeling result is qualified, determining that the current clamping pin parameter and the guide pin parameter are deterministic parameters affecting the C-shaped claw.

And if the parameter labeling result is not qualified, returning to the step of analyzing the preset workpiece drawing until the parameter labeling result is qualified.

2. The method for calculating design parameters of C-shaped claws according to claim 1, wherein in the step of acquiring a plurality of determined workpiece drawings and finding a plurality of influencing parameters in the C-shaped claws corresponding to the plurality of workpiece drawings, further comprising,

The workpiece drawing at least comprises a first sub-workpiece drawing and a second sub-workpiece drawing;

Deducing according to a plurality of influence parameters in the corresponding C-shaped claw in the first sub-workpiece drawing to obtain a first set of C-shaped claw calculation formula corresponding to the first sub-workpiece drawing;

Deducing according to a plurality of influence parameters in the corresponding C-shaped claw in the second sub-workpiece drawing to obtain a second set of C-shaped claw calculation formula corresponding to the second sub-workpiece drawing;

the plurality of influence parameters in the corresponding C-shaped claws in the first sub-workpiece drawing are not equal to the plurality of influence parameters in the corresponding C-shaped claws in the second sub-workpiece drawing.

3. The method of calculating the design parameters of the C-shaped claw according to claim 2, wherein the step of analyzing the preset workpiece drawing and matching at least one calculation formula corresponding to the preset workpiece drawing comprises,

When the preset workpiece drawing is analyzed and a calculation formula corresponding to the preset workpiece drawing is matched to be a first set of C-shaped claw calculation formula;

Inputting the wedge angle parameter of the clamping pin and the first tooth part parameter into a first set of C-shaped claw calculation formula to calculate the clamping pin parameter;

and inputting the second tooth part parameter, the axial distance parameter of the clamping pin and the guide pin and the deflection angle cross-tooth number data parameter into a first set of C-shaped claw calculation formula to calculate the distribution angle parameter of the clamping pin and the guide pin.

4. The method of calculating the design parameters of the C-shaped claw according to claim 2, wherein the step of analyzing the preset workpiece drawing and matching at least one calculation formula corresponding to the preset workpiece drawing comprises,

When the preset workpiece drawing is analyzed and a calculation formula corresponding to the preset workpiece drawing is matched to be a second set of C-shaped claw calculation formula;

Inputting the wedge angle half angle parameters, the normal pressure angle parameters and the first tooth part parameters of the clamping pin of the left tooth surface and the right tooth surface into a second set of C-shaped claw calculation formulas to calculate the design parameters of the left surface and the right surface of the clamping pin;

and inputting the second tooth part parameter, the axial distance parameter of the clamping pin and the guide pin and the deflection angle cross-tooth number data parameter into a first set of C-shaped claw calculation formula to calculate the distribution angle parameter of the clamping pin and the guide pin.

5. A method of calculating a C-jaw design parameter according to claim 2 or 3, wherein the first tooth parameters include at least a tooth number parameter, a normal modulus parameter, a normal pressure angle parameter, a rounding helix angle parameter, a gauge pitch parameter;

the second tooth part parameters at least comprise a tooth number parameter, a normal modulus parameter, a circular helix angle parameter and a spiral direction parameter.

6. A method of calculating a C-jaw design parameter according to claim 3, wherein the clamp pin and guide pin distribution angle parameters include at least a tooth flank contact point diameter parameter, a tooth flank contact point helix angle parameter, a clamp pin contact point brown thickness, and a hole center distance parameter.

7. The method of calculating the design parameters of the C-shaped jaw according to claim 4, wherein the distribution angle parameters of the clamping pin and the guiding pin at least comprise a left-hand deviation parameter, a right-hand deviation parameter and an included angle parameter.