CN106735614A - A kind of taper multiple-cutting-edge toothed tool for strength skiving technology - Google Patents

Abstract

The invention provides a conical multi-edged toothed cutter for the powerful skiving technology, comprising a powerful skiving tool body, a cutter disc set and fastening screws; the powerful skiving tool body is a conical toothed cutter ; The number of teeth of the toothed disk group is the same as the number of teeth of the powerful skiving tool body, and the tooth profile of the toothed disk group is smaller than the tooth profile of the powerful skiving tool body; the toothed disk group passes through The fastening screw is connected with the body of the powerful skiving tool. The profile accuracy of the tooth profile of the tooth disc group is lower than the profile accuracy of the tooth profile of the power skiving tool body. One pass of the present invention is equivalent to the multiple passes of the traditional single-blade gear cutting tool, and the original rough machining multiple pass process and finishing process are combined into one process, which can improve the processing efficiency of powerful gear skiving, Reduce tool consumption costs.

Description

A conical multi-flute toothed tool for power skiving technology

technical field

The invention relates to the field of mechanical processing cutters, in particular to a conical multi-edged toothed cutter for powerful gear cutting technology.

Background technique

In the field of gear processing, according to the principle of gear meshing, the traditional gear processing technology can be divided into two categories: forming method and generating method. Powerful gear cutting technology is an efficient processing method for cylindrical gears developed based on the principle of gear meshing. It is different from gear hobbing, shaping, milling and other gear processing technologies. Gear machining method. Therefore, the powerful skiving cutter is a gear cutter that is different from hobbing cutters, gear shaping cutters, and form milling cutters, and has a more complicated design and manufacturing process. It is also equivalent to a gear shaping knife. At present, the cutting conditions of special gear skiving tools designed based on power skiving technology are not good. On the one hand, due to the limitation of cutting depth and tool design, multiple tool passes are required to complete the cutting and forming of the entire tooth surface, which reduces the processing efficiency; on the other hand, due to the influence of tool wear, the service life of the tool is shortened, further using Machining accuracy is affected.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a conical multi-edged tooth cutter for power skiving technology. The cutter is easy to design and manufacture, and can improve power skiving processing efficiency and tool life.

The present invention achieves the above-mentioned technical purpose through the following technical means.

A conical multi-edged toothed cutter for powerful skiving technology, comprising a powerful skiving tool body, a cutter disc set and fastening screws; the powerful skiving tool body is a conical toothed cutter; the knife The number of teeth of the chainring set is the same as the number of teeth of the powerful skiving tool body, and the tooth profile of the toothing plate set is smaller than the tooth profile of the powerful skiving tool body; the toothing plate set is fastened The screw is connected with the body of the powerful skiving tool.

Further, the profile accuracy of the tooth disc set is lower than the profile accuracy of the tooth profile of the power skiving tool body.

Further, the tooth profile of the toothed disc set is formed by straight lines, circular arcs, curved lines, or any combination of the three types of lines.

Further, the power skiving tool body is provided with a rake angle γ of the rake face, a tool top edge relief angle α and a tool side edge relief angle λ, the rake angle γ of the rake face is 0-6°, and the The tool top edge relief angle α is 8-15°, and the tool side edge relief angle λ is calculated according to the formula λ=atan(sinα ₀ tanα), wherein: α ₀ is the pressure angle of the power skiving tool body.

Further, the tooth disc group is composed of several tooth discs, and the size of the tooth profile of the several tooth discs gradually decreases according to the distance installed on the power skiving tool body from near to far.

Further, several of the tooth discs are provided with a rake angle γ' of the rake face, a tool top edge relief angle α', and a tool side edge relief angle λ', and the rake angle γ' of the rake face is 0-6° , the top edge relief angle α' of the tool is 8 to 15°, and the side edge relief angle λ' of the tool is calculated according to the formula λ'=atan(sinα _n tanα'), wherein: α _n is a number of the tooth discs , where n is the serial number of the tooth disc, and the serial number of the tooth disc gradually increases from near to far according to the distance installed on the power skiving tool body, and n∈(1,n).

Further, the maximum tooth thicknesses of several of the cutter discs gradually decrease according to the distance installed on the powerful skiving cutter body from near to far, and the tooth thickness between the powerful skiving tool body and several of the cutter disc groups Satisfies the formula: T _n =T ₀ ·(0.95) ^{n ·(n+1)} where: T _n is the maximum tooth thickness of the nth cutter disc, T ₀ is the maximum tooth thickness of the powerful skiving tool body, n is the serial number of the tooth disc, and the serial number of the tooth disc gradually increases from near to far according to the distance installed on the power skiving tool body, and n∈(1,n).

Further, the diameters of the addendum circles of several of the cutter discs gradually decrease according to the distance installed on the powerful skiving tool body from near to far, and the teeth between the powerful skiving tool body and several of the cutter disc groups The diameter of the tip circle satisfies the formula: D _n =D ₀ ·(0.95) ^n·(n+1) , where: D _n is the diameter of the addendum circle of the nth tooth disc, and D ₀ is the body of the powerful skiving tool The diameter of the addendum circle, n is the serial number of the tooth disc, and the serial number of the tooth disc increases gradually from near to far according to the distance installed on the power skiving tool body, and n∈(1,n).

Further, the set of toothed discs is composed of a first toothed disc, a second toothed disc and a third toothed disc; the first toothed disc, the second toothed disc and the third toothed disc are in sequence with The powerful skiving cutter body is installed.

Further, the tooth profiles of the first toothed disk, the second toothed disk and the third toothed disk are composed of involute curves, and the overall height of the teeth of the first toothed disk is the height of the powerful skiving tool body 90%; the overall height of the second tooth disc is 73% of the body of the powerful skiving tool; the total height of the third tooth disc is 54% of the body of the powerful skiving tool.

Beneficial effects of the present invention:

1. The conical multi-blade tooth-shaped tool used in the powerful skiving technology of the present invention adopts a conical multi-blade structure, and one pass is equivalent to multiple passes of the traditional single-blade tooth cutting tool, and the original Multiple roughing and finishing processes are combined into one process, which can improve the efficiency of power skiving.

2. The conical multi-edged tooth-shaped tool used in the powerful skiving technology described in the present invention is detachable and replaceable, flexible to use, and has low requirements on the profile accuracy of the tooth disc, and the tool disc group has good regrindability and is easy to regrind , which can reduce the cost of using powerful gear skiving tools, especially for the processing of large batches and small modulus gears.

Description of drawings

Fig. 1 is a schematic diagram of the assembly of the tapered multi-edged toothed tool used in the powerful skiving technology according to the present invention.

Fig. 2 is an exploded view of the conical multi-edged toothed tool used in the power skiving technology of the present invention.

Fig. 3 is a projected view of the tooth profile of the toothed disc set according to the present invention.

Figure 4 shows the rake rake angle and top edge relief angle of the present invention.

Fig. 5 is the relief angle of the top edge of the present invention.

Fig. 6 is a schematic diagram of the cutting of the tapered multi-edged toothed tool used in the powerful skiving technology according to the present invention.

Fig. 7 is a schematic diagram of the contour of the combined cutter head in cutting according to the present invention.

In the picture:

1-powerful skiving tool body; 2-fastening screw; 3-first tooth disc; 4-second tooth disc; 5-third knife disc; 6-third envelope profile; 7-th Second envelope profile; 8-first envelope profile; 9-subject envelope profile; 10-workpiece.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

As shown in Figure 1 and Figure 2, a conical multi-edged toothed cutter for powerful skiving technology, including a powerful skiving tool body 1, a cutter disc set and a fastening screw 2; the powerful skiving tool The body 1 is a conical toothed tool; the number of teeth of the tooth disc group is the same as that of the powerful skiving tool body 1, and the tooth profile of the tooth disc group is smaller than the tooth profile of the powerful skiving tool body 1 profile; the tooth profile of the toothed disc group is formed by a straight line or an arc or a curve or any combination of the three line types. The tooth disc set is connected with the powerful skiving tool body 1 through fastening screws 2 . The profile accuracy of the tooth profile of the tooth disc group is lower than the profile accuracy of the tooth profile of the power skiving tool body 1 . The toothed disk group is composed of several toothed disks, and the size of the tooth profile of the several toothed disks gradually decreases from near to far according to the distance installed on the powerful skiving tool body 1 . With this structure, one pass is equivalent to multiple passes of the traditional single-edge skiving tool, and the original multiple roughing and finishing processes are combined into one process, which can improve the efficiency of power skiving.

As shown in FIG. 4 and FIG. 5, the power skiving tool body 1 is provided with a rake angle γ of the rake face, a tool top edge relief angle α and a tool side edge relief angle λ, and the rake angle γ of the rake face is 0-6°, the tool top edge relief angle α is 8-15°, and the tool side edge relief angle λ is calculated according to the formula λ=atan(sinα ₀ tanα), wherein: α ₀ is the power cutting tooth Tool body 1 pressure angle.

A plurality of said tooth discs are provided with rake angle γ' of the rake face, tool top edge relief angle α' and tool side edge relief angle λ', and the rake angle γ' of the rake face is 0-6°, so The top edge relief angle α' of the tool is 8-15°, and the side edge relief angle λ' of the tool is calculated according to the formula λ'=atan(sinα _n tanα'), wherein: α _n is the pressure of several tooth discs angle, where n is the serial number of the tooth disc, and the serial number of the tooth disc increases gradually from near to far according to the distance installed on the powerful skiving tool body 1, and n∈(1,n).

The maximum tooth thickness of several said tooth discs gradually decreases according to the distance installed on said powerful skiving tool body 1 from near to far, and the tooth thickness between said powerful skiving tool body 1 and several said tooth disc groups Satisfies the formula: T _n =T ₀ ·(0.95) ^{n ·(n+1)}

Among them: T _n is the maximum tooth thickness of the nth tooth disc, T ₀ is the maximum tooth thickness of the powerful skiving tool body 1, n is the serial number of the tooth disc, and the serial number of the tooth disc is installed according to the The distance from the power skiving tool body 1 gradually increases from near to far, and n∈(1,n).

The diameters of the addendum circles of several of the cutter discs gradually decrease according to the distance installed on the powerful skiving tool body 1 from near to far, and the teeth between the powerful skiving tool body 1 and several of the cutter disc groups The diameter of the top circle satisfies the formula: D _n ＝D ₀ ·(0.95) ^{n ·(n+1)}

Wherein: D _n is the diameter of the addendum circle of the nth tooth disc, _D0 is the diameter of the addendum circle of the powerful skiving tool body 1, n is the serial number of the knife disc, and the serial number of the cutter disc is based on the installation The distance between the powerful skiving tool body 1 gradually increases from near to far, and n∈(1,n).

In conjunction with FIG. 3 , the set of toothed discs is optimally composed of a first toothed disc 3 , a second toothed disc 4 and a third toothed disc 5 ; the first toothed disc 3 and the second toothed disc 4 and the third tooth disc 5 are installed with the powerful skiving tool body 1 in sequence. The tooth profiles of the first toothed disc 3, the second toothed disc 4 and the third toothed disc 5 are composed of involute curves, and the full height of the teeth of the first toothed disc 3 is that of the powerful skiving tool 90% of the body 1; the overall height of the 4 teeth of the second tooth disc is 73% of the body 1 of the powerful skiving tool; the total height of 5 teeth of the third tooth disc is 54% of the body 1 of the powerful skiving tool %.

6 and 7, during the cutting process, the third toothed disc 5 first cuts into the workpiece 10, and after the workpiece 10 rotates one revolution, all the teeth on the third toothed disc 5 form a third envelope profile 6; subsequently, the third toothed disc 5 The second tooth disc 4, the first tooth disc 3 and the powerful skiving tool body 1 cut into the workpiece 10 in turn. Similarly, all the teeth on the second tooth disc 4 form a second envelope profile 7, and the first knife All the teeth on the gear plate 3 form the first envelope profile 8, while all the teeth on the power skiving tool body 1 form the main envelope profile 9; finally, the main envelope profile 9 is the end section of the workpiece 10 shape. It can be seen from the machining process that the tooth surface accuracy of the workpiece 10 is determined by the main body envelope profile 9 formed by the powerful skiving tool body 1, for the first tooth disc 3, the second tooth disc 4 and the third tooth disc 5 does not require high profile accuracy, therefore, using this tool for powerful gear turning can complete efficient machining from blank to gear in one pass, which not only saves tool costs, but also improves processing efficiency.

For example, the workpiece 10 is an internal-toothed cylindrical gear, the normal modulus m _n =2mm, the number of teeth z _g =75, the pressure angle α _n =20°, the helix angle β=20°, and the width b=45mm; The normal modulus of the cutter body 1 and the cutter disc is m _n =2 mm, the gear is z _t =38, the cutter installation angle is Σ=20°, the cutter rake angle γ of the cutter body 1 is 6°, and the top edge relief angle α is 12°, then the side edge relief angle λ is calculated to be 4.158°.

The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.

Claims (10)

1. a kind of taper multiple-cutting-edge toothed tool for strength skiving technology, it is characterised in that including strength skiving cutter body (1), cutter tooth disk group and trip bolt (2)；The strength skiving cutter body (1) is taper toothed tool；The cutter tooth disk group The number of teeth it is identical with strength skiving cutter body (1) number of teeth, and the cutter tooth disk group tooth profile be less than the strength Skiving cutter body (1) tooth profile；The cutter tooth disk group passes through trip bolt (2) and the strength skiving cutter body (1) Connection.

2. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim 1, it is characterised in that the cutter tooth The tooth profile precision of disk group will be less than strength skiving cutter body (1) tooth profile precision.

3. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim 1, it is characterised in that the cutter tooth The tooth profile of disk group is formed by any combination of straight line or circular arc or curve or three kinds of line styles.

4. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim 1, it is characterised in that the strength Skiving cutter body (1) is provided with anterior angle γ, the cutter top relief angle α and cutter side edge clearance angle λ of rake face, before the rake face Angle γ is 0~6 °, and the cutter top relief angle α is 8~15 °, and the cutter side edge clearance angle λ is according to formula λ=atan (sin α₀Tan α) calculate, wherein：α₀It is strength skiving cutter body (1) pressure angle.

5. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim any one of 1-5, it is characterised in that The cutter tooth disk group is made up of some cutter tooth disks, and the tooth profile size of some cutter tooth disks is according to installed in the strength car The distance of tooth cutter body (1) is by closely to far gradually successively decreasing.

6. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim 5, it is characterised in that some described Cutter tooth disk is provided with anterior angle γ ＇, the cutter top relief angle α ＇ and cutter side edge clearance angle λ ＇ of rake face, the anterior angle γ ＇ of the rake face It it is 0~6 °, the cutter top relief angle α ＇ are 8~15 °, and the cutter side edge clearance angle λ ＇ are according to formula λ '=atan (sin α_nTan α ') calculate, wherein：α_nBe the pressure angle of some cutter tooth disks, wherein n is the sequence number of cutter tooth disk, and cutter tooth disk sequence number According to installed in strength skiving cutter body (1) distance by closely to being far gradually incremented by, and n ∈ (1, n).

7. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim 5, it is characterised in that some described The maximum tooth thickness of cutter tooth disk according to installed in strength skiving cutter body (1) distance by closely to far gradually successively decreasing and described Transverse tooth thickness meets formula between strength skiving cutter body (1) and some cutter tooth disk groups：T_n=T₀·(0.95)^n·(n+1)

Wherein：T_nIt is n-th maximum tooth thickness of cutter tooth disk, T₀It is strength skiving cutter body (1) maximum tooth thickness, n is cutter tooth The sequence number of disk, and cutter tooth disk sequence number according to installed in strength skiving cutter body (1) distance by closely to being far gradually incremented by, And n ∈ (1, n).

8. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim 5, it is characterised in that some described The tip diameter of cutter tooth disk according to installed in strength skiving cutter body (1) distance by closely to far gradually successively decreasing, and institute State tip diameter between strength skiving cutter body (1) and some cutter tooth disk groups and meet formula：D_n=D₀·(0.95 )^n·(n+1)

Wherein：D_nIt is n-th tip diameter of cutter tooth disk, D₀It is the tip diameter of the strength skiving cutter body (1), n Be the sequence number of cutter tooth disk, and cutter tooth disk sequence number according to installed in strength skiving cutter body (1) distance by closely to far by Gradually it is incremented by, and n ∈ (1, n).

9. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim any one of 6-8, it is characterised in that The cutter tooth disk group is made up of the first cutter tooth disk (3), the second cutter tooth disk (4) and the 3rd cutter tooth disk (5)；The first cutter tooth disk (3), the second cutter tooth disk (4) and the 3rd cutter tooth disk (5) are installed with the strength skiving cutter body (1) in order.

10. the taper multiple-cutting-edge toothed tool of strength skiving technology is used for according to claim 9, it is characterised in that described the The tooth profile of one cutter tooth disk (3), the second cutter tooth disk (4) and the 3rd cutter tooth disk (5) is made up of involute curve, first knife Fluted disc (3) whole depth is the 90% of the strength skiving cutter body (1)；Second cutter tooth disk (4) whole depth is described strong The 73% of power skiving cutter body (1)；3rd cutter tooth disk (5) whole depth is the strength skiving cutter body (1) 54%.