CN203003251U

CN203003251U - Broach

Info

Publication number: CN203003251U
Application number: CN 201220644315
Authority: CN
Inventors: 钟如钢
Original assignee: China National South Aviation Industry Co Ltd
Current assignee: AECC South Industry Co Ltd
Priority date: 2012-11-29
Filing date: 2012-11-29
Publication date: 2013-06-19
Anticipated expiration: 2022-11-29

Abstract

The utility model provides a broach. All broach teeth are of a double-clearance angle structure with a first clearance angle alpha and a second clearance angle beta; each broach tooth comprises an oblique first flank and an oblique second flank; the first flanks and the second flanks are intersected; the first flanks and the cutting plane of the broach form the first clearance angle alpha; and the second flanks and the cutting plane form the second clearance angle beta. By applying the technical scheme provided by the utility model, according to the broach with the double-clearance angle structure, cuttings can be smooth and curled through effects of the first flanks and the second flanks, and therefore, the technical problems that broach breaking and tipping occur due to the extrusion of the cuttings are solved.

Description

Broaching tool

Technical field

The utility model relates to the processing equipment field, in particular to a kind of broaching tool.

Background technology

Turbine disk tongue-and-groove of the prior art is complex-shaped, become fir shape, and dimensional accuracy is high, is the most unmanageable position of the aero-engine key component turbine disk always.As depicted in figs. 1 and 2, using respectively common broaching tool 1 of the prior art and side set broaching tool 2 processes certain type turbine disk tongue-and-groove, due to minimum slot width place≤2mm, and whole profile all will be processed when the fine finishining tongue-and-groove, so need all be provided with blade on the broaching tool both sides.But use broaching tool structure of the prior art, when guaranteeing enough chip spaces, be difficult to guarantee enough cutter tooth intensity.When guaranteeing enough cutter tooth intensity, be difficult to again guarantee enough chip spaces, thereby cause that broaching tool is easily forged a knife, the problem of tipping, the problem that causes further workpiece to be scrapped.

The utility model content

The utility model aims to provide a kind of broaching tool, avoids occurring in process forging a knife to reach, the purpose of tipping.

To achieve these goals, the utility model provides a kind of broaching tool, each cutter tooth is the two rear corner structure with the first relief angle α and second relief angle β, cutter tooth comprises the major first flank of inclination and the second rear knife face of inclination, major first flank and the second rear knife face intersect, the cutting plane of major first flank and broaching tool forms the first relief angle α, and the second rear knife face and cutting plane form the second relief angle β.

Further, the first relief angle α is less than the second relief angle β.

Further, the size of the first relief angle α is 2 ° to 4 °, and the size of the second relief angle β is 3 ° to 8 °.

Further, broaching tool also is provided with the bits section of holding, and major first flank, the second rear knife face and hold bits sections and set gradually from front to back hold the major first flank that bits sections and the second rear knife face are connected and extend to adjacent cutter tooth.

Further, along the cutting movement direction of broaching tool, the distance L 1 between the starting point of the starting point of major first flank and the second rear knife face is 2mm to 4mm.

Further, along the cutting movement direction of broaching tool, the starting point of major first flank and the distance L 2 of holding between the starting point of bits section are 7mm to 10mm.

Further, along the cutting movement direction of broaching tool, the distance L 3 between the starting point of the starting point of major first flank and the major first flank of adjacent cutter tooth is 12mm to 15mm.

Further, broaching tool is the side set structure, and along the cutting movement direction of broaching tool, the distance between the starting point of the starting point of major first flank and the major first flank of a relative side is L3/2.

Further, broaching tool is the side set structure.

Further, broaching tool is used for the processing fir-shaped mortise, and the shape of the cross sectional shape of each cutter tooth and fir-shaped mortise correspondence position is suitable.

Use the technical solution of the utility model, arrange two after the broaching tools of corner structures, the effect by major first flank and the second rear knife face makes the smear metal can be smoothly curling, thereby avoids the technical problem because of forging a knife of producing of smear metal extruding, tipping.

Further, the length of holding bits sections by control can not be deposited in smear metal to hold bits sections, thereby reaches the purpose that guarantees chip space, further, avoids piling up because of smear metal the technical problem of the cutter tooth undercapacity that causes.

Description of drawings

The Figure of description that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the structural representation of common broaching tool in prior art;

Fig. 2 is the structural representation of side set broaching tool in prior art;

Fig. 3 is according to the broaching tool structural representation in the utility model the first embodiment;

Fig. 4 is the enlarged drawing of A section in Fig. 3;

Fig. 5 is for using the longitudinal cross-section schematic diagram of the broaching tool in the utility model the second embodiment;

Fig. 6 is for using the broaching schematic diagram of the miniature tongue-and-groove of broaching tool fine finishining in the utility model the second embodiment;

Fig. 7 is according to the broaching tool structural representation in the utility model the 3rd embodiment;

Fig. 8 is for using the broaching schematic diagram of the miniature tongue-and-groove of broaching tool roughing in the utility model the 3rd embodiment.

The specific embodiment

Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.

As shown in Figure 3 and Figure 4, the utility model the first embodiment provides a kind of broaching tool 10, and above-mentioned broaching tool 10 is the side set structure, and each cutter tooth is the two rear corner structure that comprises the first relief angle α and the second relief angle β.Each cutter tooth includes major first flank 11 and the second rear knife face 12, and major first flank 11 and the second rear knife face 12 intersect, and the terminal point of major first flank 11 overlaps with the starting point of the second rear knife face 12.Major first flank 11 forms the first relief angle α with the cutting plane, and the second rear knife face 12 forms the second relief angle β with the cutting plane.The first relief angle α is less than the second relief angle β.The size of α in the present embodiment is 2 ° to 4 °, and the size of β is 3 ° to 8 °.

Arrange two after the broaching tools 10 of corner structures, the effect by major first flank 11 and the second rear knife face 12 makes the smear metal can be smoothly curling, thereby avoids the technical problem because of forging a knife of producing of smear metal extruding, tipping.

Broaching tool 10 also is provided with the bits section 13 that holds, and described major first flank 11, the described second rear knife face 12 and described appearance bits section 13 set gradually from front to back.Wherein, " front " refers to the cutting movement direction of broaching tool.Hold the major first flank 11 that bits sections 13 and the second rear knife face 12 are connected and extend to adjacent cutter tooth.Particularly, as shown in Figure 4, along the cutting movement direction of broaching tool 10, the distance L 1 between the starting point of the starting point of major first flank 11 and the second rear knife face 12 is 2mm to 4mm.The starting point of major first flank 11 and the distance L 2 of holding between the starting point of bits section 13 are 7mm to 10mm.Distance L 3 between the starting point of the starting point of major first flank 11 and the major first flank of adjacent cutter tooth is 12mm to 15mm.Need to prove, along the cutting movement direction of broaching tool 10, the distance between the starting point of the starting point of above-mentioned major first flank 11 and the major first flank of a relative side is L3/2, i.e. 6mm to 7.5mm.

The length of holding bits section 13 by control can not be deposited in smear metal to hold bits section 13, thereby reaches the purpose that guarantees chip space, further, avoids piling up because of smear metal the technical problem of the cutter tooth undercapacity that causes.

As shown in Figure 5, the broaching tool 10 in the second embodiment is used for the fine finishining fir-shaped mortise, and the shape of the cross sectional shape of each cutter tooth and fir-shaped mortise correspondence position is suitable.The edge is by front backward directions, and the size of cutter tooth increases successively, until the shape of this side tool tooth is identical with the shape of fir-shaped mortise correspondence position.And in the second embodiment, the cutter tooth of broaching tool 10 is longer, and the cutter tooth previous section is thicker, can bear main cutting force; The cutter tooth rear section is thinner, considers, rolls up bits for holding to be worth doing the space is provided, and avoids the smear metal extruding, thereby plays the effect that strengthens cutter tooth intensity.

As shown in Figure 6, mark 21,22 in figure ... 33 for removing the order of material in this fir-shaped mortise processing, it is zone shown in Reference numeral 21, expression is removed this regional material to cutter with one, zone shown in Reference numeral 22, be illustrated in and process the material of removing zone shown in 22 shown in 21 behind the zone with another cutter, by that analogy, until the final machine-shaping of tongue-and-groove.The surplus that wherein shown in 33, the zone will be removed for fine finishining, broaching tool 10 structures in the utility model the second embodiment are exactly for this regional material of removal, zone shown in to be processed complete 33, and whole tongue-and-groove can be completed processing.

As shown in Figure 7, the utility model the 3rd embodiment provides a kind of broaching tool for the roughing fir-shaped mortise, can avoid forging a knife, tipping, and this broaching tool strengthens the length of holding bits section further, sufficient chip space is provided, thereby reaches the purpose of avoiding the smear metal extruding.

As shown in Figure 8, mark 41,42 in figure ... 49 for removing the order of material in this tongue-and-groove processing, it is zone shown in Reference numeral 41, expression is removed this regional material to cutter with one, zone shown in Reference numeral 42, be illustrated in and process the material of removing zone shown in 42 shown in 41 behind the zone with another cutter, by that analogy, until the final machine-shaping of tongue-and-groove.Wherein, the broaching tool structure in the utility model the 3rd embodiment is exactly that its structure and this regional contour shape are suitable, to complete the roughing to tongue-and-groove for the material of removing zone shown in 47.

From above description, can find out, the utility model the above embodiments have realized following technique effect: the broaching tool that two rear corner structures are set, effect by major first flank and the second rear knife face makes the smear metal can be smoothly curling, thereby avoids the technical problem because of forging a knife of producing of smear metal extruding, tipping.

The above is only preferred embodiment of the present utility model, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. broaching tool, it is characterized in that, each cutter tooth is the two rear corner structure with the first relief angle α and second relief angle β, described cutter tooth comprises the major first flank (11) of inclination and the second rear knife face (12) that tilts, described major first flank (11) intersects with the described second rear knife face (12), described major first flank (11) forms described the first relief angle α with the cutting plane of described broaching tool, and the described second rear knife face (12) forms described the second relief angle β with described cutting plane.

2. broaching tool according to claim 1, is characterized in that, described the first relief angle α is less than described the second relief angle β.

3. broaching tool according to claim 2, is characterized in that, the size of described the first relief angle α is 2 ° to 4 °, and the size of described the second relief angle β is 3 ° to 8 °.

4. the described broaching tool of any one according to claim 1 to 3, it is characterized in that, described broaching tool also is provided with the bits sections (13) that hold, described major first flank (11), the described second rear knife face (12) and described appearance bits sections (13) set gradually from front to back, and described appearance bits sections (13) and the described second rear knife face (12) are connected and extend to the major first flank (11) of adjacent cutter tooth.

5. the described broaching tool of any one according to claim 1 to 3, is characterized in that, along the cutting movement direction of described broaching tool, the distance L 1 between the starting point of the starting point of described major first flank (11) and the described second rear knife face (12) is 2mm to 4mm.

6. broaching tool according to claim 4, is characterized in that, along the cutting movement direction of described broaching tool, the distance L 2 between the starting point of the starting point of described major first flank (11) and described appearance bits sections (13) is 7mm to 10mm.

7. broaching tool according to claim 4, is characterized in that, along the cutting movement direction of described broaching tool, the distance L 3 between the starting point of the starting point of described major first flank (11) and the major first flank of described adjacent cutter tooth is 12mm to 15mm.

8. broaching tool according to claim 7, is characterized in that, described broaching tool is the side set structure, and along the cutting movement direction of described broaching tool, the starting point of described major first flank (11) is L3/2 with distance between the starting point of the major first flank of a relative side.

9. the described broaching tool of any one according to claim 1 to 3, is characterized in that, described broaching tool is the side set structure.

10. the described broaching tool of any one according to claim 1 to 3, is characterized in that, described broaching tool is used for the processing fir-shaped mortise, and the shape of the cross sectional shape of each described cutter tooth and described fir-shaped mortise correspondence position is suitable.