CN209256013U - A kind of salient angle type hobboing cutter - Google Patents
A kind of salient angle type hobboing cutter Download PDFInfo
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- CN209256013U CN209256013U CN201821678352.2U CN201821678352U CN209256013U CN 209256013 U CN209256013 U CN 209256013U CN 201821678352 U CN201821678352 U CN 201821678352U CN 209256013 U CN209256013 U CN 209256013U
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Abstract
The utility model relates to a kind of salient angle type hobboing cutter, the production method for mainly solving the problem of the existing salient angle type involute hob when SAP is round excessive with Df circle difference in gear parameter can not effectively guarantee SAP, Df and thickness at root of tooth.Salient angle type hobboing cutter includes the addendum circle arc set gradually, linear cutting edge, transitional cut sword and main cutting edge, and linear cutting edge is arranged in parallel with main cutting edge, and linear cutting edge and the tangent setting of addendum circle arc.
Description
Technical field
The utility model relates to a kind of hobboing cutter technologies, and in particular to a kind of salient angle type hobboing cutter.
Background technique
In the design of salient angle type involute hob, the parameter designing of salient angle part, it is necessary to while after guaranteeing product processing
Circular diameter (SAP), root diameter (Df) and thickness at root of tooth are originated with the gear hobbing involute for meeting design requirement.When product is joined
The SAP required in number and Df difference is excessive, more than whole depth 20% or more when, according to traditional hobboing cutter production method, simultaneously
Guarantee SAP, Df and thickness at root of tooth is impossible.There are two types of the existing compromise production methods generallyd use: a kind of as shown in Figure 1, Figure 2
It is shown, SAP diameter is reduced, to guarantee Df and thickness at root of tooth, such mode can be such that the length of product easement curve reduces, curvature increases
Add, increase the risk that stress is concentrated, requires not being inconsistent with product design；Another as shown in Figure 3, Figure 4, the salient angle for increasing hobboing cutter is thick
Spending d can be such that the tooth root transverse tooth thickness of product reduces though such mode can guarantee Df and SAP, and the tooth root bending for reducing gear is strong
Degree, increases the broken teeth risk of gear.
Utility model content
The purpose of this utility model is that the production method for solving existing salient angle type involute hob can not be effectively ensured simultaneously
SAP, Df and the problem of thickness at root of tooth, provide a kind of salient angle type hobboing cutter.
The technical solution of the utility model is:
A kind of salient angle type hobboing cutter, including addendum circle arc, linear cutting edge, transitional cut sword and the main cutting set gradually
Sword, the linear cutting edge are arranged in parallel with main cutting edge, and linear cutting edge and the tangent setting of addendum circle arc；
The vertical range on the linear cutting edge lower end and addendum circle arc top is b；
B=Ha0-sin(αt)×(d1×sin(αt)/2-ρtmin+ΔL)
Wherein, Ha0For Gear Root height；
αtFor gear face pressure angle；
d1For gear compound graduation circular diameter；
ρtminFor the corresponding radius of curvature of Involute gear starting circle；
Δ L is gear teeth overshoot；
The parallel distance of the linear cutting edge and main cutting edge is d,
D=(dwH×sin(αbw)/2+hg×tan(αn)-d1×(αbw+ewhs)/2)×cos(β1)×cos(αn)
Wherein,
dwHDiameter of a circle is originated for the effective involute of gear；
dbFor gear compound graduation circular diameter；
αbwFor gear dwHSpace width answers the half of central angle on circle；
Hg is distance of the hobboing cutter salient angle initial position to hobboing cutter nodel line；
αnFor gear normal pressure angle；
ewhsFor gear dwHCircle involute angular difference value corresponding with gear cyclotomy；
β1For gear cyclotomy helical angle；
The radius value of the hobboing cutter salient angle addendum circle arc is R；
R=(S0n×cos(αn)/2-Ha0×sin(αn)+d)/(1-sin(αn))
Wherein, S0nFor gear normal direction cyclotomy space width；
αnFor gear normal pressure angle；
The vertical range on the top of the upper end and addendum circle arc of the linear cutting edge is a；
A=R × (1-sin (αn))
Wherein, R is hobboing cutter outside circle arc radius；
The lower end of the transitional cut sword and the vertical range on addendum circle arc top are c；
C=b+d/ (tan (αn)-tan(α’n))
Wherein, α 'nFor hobboing cutter transitional cut sword normal pressure angle.
The utility model compared with prior art, has following technical effect that
1. accurate to guarantee that the involute that gear requires originates circle in the product of processing using the hobboing cutter of the utility model
Diameter (SAP), root diameter (Df) and product thickness at root of tooth；Meanwhile fillet curve length will not be made to shorten, it avoids sending out
The probability of raw easement curve interference；Since straight line added in lobe formation is parallel with hobboing cutter main cutting edge, so this section of straight line institute
The negotiating curved sections of converted products, it is parallel with the finishing involute of the flank of tooth, it can guarantee product transverse tooth thickness to the greatest extent, guarantee
The design teeth bending strength of gear.
2. the utility model, in the lobe formation of salient angle type involute hob, one section of increase is parallel with hobboing cutter main cutting edge
Linear cutting edge, upper end is tangent with addendum circle arc, lower end extend to product requirement gear hobbing involute originate circle corresponding position
Place.Such hobboing cutter can effectively guarantee that gear hobbing SAP, Df and thickness at root of tooth meet product design requirement in converted products, and not
The length of the easement curve of product can be made to shorten, avoid the probability that easement curve interference occurs.
3. the increased linear cutting edge of the utility model is parallel with hobboing cutter main cutting edge, so linear cutting edge processes production
The negotiating curved sections of product are the equal space lines for finishing the flank of tooth, will not guarantee to the greatest extent tooth with finishing path of contact interference
The design teeth bending strength of root thickness and gear.
Detailed description of the invention
Fig. 1 is the existing hobboing cutter teeth portion schematic shapes for reducing SAP diameter；
Fig. 2 is using the product teeth portion schematic shapes for reducing the processing of SAP diameter hobboing cutter；
Fig. 3 is the existing hobboing cutter teeth portion schematic shapes for increasing hobboing cutter salient angle thickness；
Fig. 4 is using the product teeth portion schematic shapes for increasing the processing of salient angle thickness hobboing cutter；
Fig. 5 is that the utility model salient angle adds linear structure schematic diagram；
Fig. 6 is the product teeth portion schematic shapes of the utility model hobboing cutter processing；
Fig. 7 is that the utility model salient angle adds straight line hobboing cutter relevant parameter schematic diagram.
Appended drawing reference: 1- addendum circle arc, 2- linear cutting edge, 3- transitional cut sword, 4- main cutting edge.
Specific embodiment
It is described in further detail below in conjunction with content of the drawings and specific embodiments to the utility model:
The utility model increases by one section and hobboing cutter master in the lobe formation of hobboing cutter according to the generating principle of gear hobbing process
The parallel linear cutting edge of cutting edge is cut by most of moulding that this section of straight line portion completes easement curve, using this rolling
The product of knife structure processing, can protect SAP, Df and thickness at root of tooth of design of gears requirement simultaneously, and not reduce the mistake of product
Length of curve is crossed, guarantees that the teeth bending strength of gear does not reduce.
Increased linear cutting edge upper end and addendum circle arc are tangent, and lower end extends to the gear hobbing involute starting of product requirement
Circle corresponding position.Using the hobboing cutter of such form, in converted products, it can effectively guarantee gear hobbing SAP, Df and thickness at root of tooth
Meet product design requirement, and the length of the easement curve of product will not be made to shorten；Simultaneously because added straight in lobe formation
Line is parallel with hobboing cutter main cutting edge, so the negotiating curved sections of this section of straight line institute converted products, are the equidistant of the finishing flank of tooth
Line will not guarantee to the greatest extent thickness at root of tooth, guarantee the design teeth bending strength of gear with finishing path of contact interference.
Involute starting circular diameter (SAP) and the excessive feelings of root diameter (Df) difference in known gears design parameter
Under condition, salient angle type hobboing cutter is designed according to gear parameter.
Salient angle adds the hobboing cutter of straight line to design in addition to label parameters in Fig. 7, and the design of remaining parameter is identical as traditional design.Such as
Fig. 5, Fig. 6, salient angle type hobboing cutter shown in Fig. 7, including set gradually addendum circle arc 1, linear cutting edge 2,3 and of transitional cut sword
Main cutting edge 4, linear cutting edge is arranged in parallel with main cutting edge, and linear cutting edge and the tangent setting of addendum circle arc；The hobboing cutter
Have the root circle of suitable involute initial diameter, the tooth root amount of uprooting and product requirement straight with product after guaranteeing processing
Diameter.
The vertical range on linear cutting edge lower end and addendum circle arc top is b (the termination height b of straight line added by hobboing cutter salient angle
Value)；
B=Ha0-sin(αt)×(d1×sin(αt)/2-ρtmin+ΔL)
Wherein, Ha0For hobboing cutter height of teeth top, it is equal to Gear Root height；
αtFor gear face pressure angle；
d1For gear compound graduation circular diameter；
ρtminFor the corresponding radius of curvature of Involute gear starting circle；
Δ L is gear teeth overshoot；
The parallel distance of linear cutting edge and main cutting edge is d (calculating of hobboing cutter salient angle thickness d value),
D=(dwH×sin(αbw)/2+hg×tan(αn)-d1×(αbw+ewhs)/2)×cos(β1)×cos(αn)
Wherein,
dwHDiameter of a circle is originated for the effective involute of gear；
dbFor gear compound graduation circular diameter；
αbwFor gear dwHSpace width corresponds to the half of central angle on circle；
αnFor gear normal pressure angle；
ewhsFor gear dwHCircle involute angular difference value corresponding with gear cyclotomy；
β1For gear cyclotomy helical angle；
The radius value of hobboing cutter salient angle addendum circle arc is R；
R=(S0n×cos(αn)/2-Ha0×sin(αn)+d)/(1-sin(αn))
Wherein, S0nFor hobboing cutter normal tooth thickness, it is equal to gear cyclotomy space width；
Ha0For hobboing cutter height of teeth top, it is equal to Gear Root height；
The vertical range on the top of the upper end and addendum circle arc of linear cutting edge is a (starting of straight line added by hobboing cutter salient angle
Height a value calculates)；
A=R × (1-sin (αn))
Wherein, R is hobboing cutter outside circle arc radius；
The lower end of transitional cut sword and the vertical range on addendum circle arc top are that (hobboing cutter transitional cut sword terminates height c value to c
It calculates)；
C=b+d/ (tan (αn)-tan(α’n))
α'nFor hobboing cutter transitional cut sword normal pressure angle, value is generally (αn-5)。
Meanwhile the utility model also provides a kind of production method of salient angle type hobboing cutter, comprising the following steps:
1) gear known parameters are obtained；
The high H of Gear Roota0, gear face pressure angle αt, gear compound graduation circular diameter d1, Involute gear starting circle it is corresponding
Radius of curvature ρtmin, the effective involute of gear teeth overshoot Δ L, gear originate diameter of a circle dwH, gear compound graduation circular diameter db、
dwHIt is α that space width, which corresponds to the half of central angle, on circlebw, gear normal pressure angle αn、dwHCircle involute corresponding with gear cyclotomy
Angular difference value is ewhs, gear cyclotomy helixangleβ1, gear cyclotomy space width S0n；
2) salient angle type hobboing cutter parameter is calculated according to the parameter of step 1)；
2.1) the vertical range b of linear cutting edge lower end and addendum circle arc top；
B=Ha0-sin(αt)×(d1×sin(αt)/2-ρtmin+ΔL)
2.2) the parallel distance d of linear cutting edge and main cutting edge；
D=(dwH×sin(αbw)/2+hg×tan(αn)-d1×(αbw+ewhs)/2)×cos(β1)×cos(αn)
2.3) the radius value R of hobboing cutter salient angle addendum circle arc；
R=(S0n×cos(αn)/2-Ha0×sin(αn)+d)/(1-sin(αn))
2.4) the vertical range a of linear cutting edge upper end and addendum circle arc top；
A=R × (1-sin (αn))
2.5) the vertical range c of transitional cut sword and addendum circle arc top；
C=b+d/ (tan (αn)-tan(α’n))
3) salient angle type hobboing cutter is processed according to the parameter that step 2) obtains.
In above step, step 2.1) and step 2.2) can sequence in no particular order, step 2.4) and step 2.5) can be regardless of
Sequencing.
Salient angle, which can be completed, according to embodiment of above adds the hobboing cutter of straight line to design.
Claims (2)
1. a kind of salient angle type hobboing cutter, it is characterised in that: including set gradually addendum circle arc (1), linear cutting edge (2), transition
Cutting edge (3) and main cutting edge (4), the linear cutting edge (2) is arranged in parallel with main cutting edge (4), and linear cutting edge (2)
With addendum circle arc (1) tangent setting；
The vertical range on linear cutting edge (2) lower end and addendum circle arc (1) top is b；
B=Ha0-sin(αt)×(d1×sin(αt)/2-ρtmin+ΔL)
Wherein, Ha0For Gear Root height；
αtFor gear face pressure angle；
d1For gear compound graduation circular diameter；
ρtminFor the corresponding radius of curvature of Involute gear starting circle；
Δ L is gear teeth overshoot；
The parallel distance of the linear cutting edge (2) and main cutting edge (4) is d,
D=(dwH×sin(αbw)/2+hg×tan(αn)-d1×(αbw+ewhs)/2)×cos(β1)×cos(αn) wherein,
dwHDiameter of a circle is originated for the effective involute of gear；
dbFor gear compound graduation circular diameter；
αbwFor gear dwHSpace width answers the half of central angle on circle；
Hg is distance of the hobboing cutter salient angle initial position to hobboing cutter nodel line；
αnFor gear normal pressure angle；
ewhsFor gear dwHCircle involute angular difference value corresponding with gear cyclotomy；
β1For gear cyclotomy helical angle；
The radius value of the hobboing cutter salient angle addendum circle arc (1) is R；
R=(S0n×cos(αn)/2-Ha0×sin(αn)+d)/(1-sin(αn))
Wherein, S0nFor gear normal direction cyclotomy space width；
αnFor gear normal pressure angle；
The vertical range on the top of the upper end and addendum circle arc (1) of the linear cutting edge (2) is a；
A=R × (1-sin (αn))
Wherein, R is hobboing cutter outside circle arc radius；
The lower end of the transitional cut sword (3) and the vertical range on addendum circle arc (1) top are c；
C=b+d/ (tan (αn)-tan(α ' n))
Wherein, α 'nFor hobboing cutter transitional cut sword normal pressure angle.
2. salient angle type hobboing cutter according to claim 1, it is characterised in that: hobboing cutter transitional cut sword normal pressure angle α 'nValue
For an-5。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821678352.2U CN209256013U (en) | 2018-10-16 | 2018-10-16 | A kind of salient angle type hobboing cutter |
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| CN201821678352.2U CN209256013U (en) | 2018-10-16 | 2018-10-16 | A kind of salient angle type hobboing cutter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109304524A (en) * | 2018-10-16 | 2019-02-05 | 西安法士特汽车传动有限公司 | A kind of salient angle type hobboing cutter and preparation method thereof |
| CN114769741A (en) * | 2022-03-28 | 2022-07-22 | 陕西法士特齿轮有限责任公司 | Addendum full-circular-arc hob and design method thereof |
-
2018
- 2018-10-16 CN CN201821678352.2U patent/CN209256013U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109304524A (en) * | 2018-10-16 | 2019-02-05 | 西安法士特汽车传动有限公司 | A kind of salient angle type hobboing cutter and preparation method thereof |
| CN109304524B (en) * | 2018-10-16 | 2024-01-02 | 西安法士特汽车传动有限公司 | Convex angle type hob and manufacturing method thereof |
| CN114769741A (en) * | 2022-03-28 | 2022-07-22 | 陕西法士特齿轮有限责任公司 | Addendum full-circular-arc hob and design method thereof |
| CN114769741B (en) * | 2022-03-28 | 2024-01-02 | 陕西法士特齿轮有限责任公司 | Full-arc hob with tooth tops and design method thereof |
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Granted publication date: 20190816 Effective date of abandoning: 20240102 |
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