CN207873285U - A kind of burnishing-in reamer for high-accuracy deep hole machining - Google Patents

Abstract

The utility model provides a kind of burnishing-in reamer for high-accuracy deep hole machining, can solve the problems, such as that traditional deep hole processing cutter precision is low, service life is short, hole machined quality cannot be satisfied technological requirement.It includes coaxial the first cylinder of integrally connected of sequence, the second cylinder and third cylinder successively, first cylinder is the reamer head of a diameter of d1, second cylinder is the neck of a diameter of d2, and the diameter d2=d1 0.5mm of neck, third cylinder is the shank of a diameter of d3, being intervally arranged on the peripheral surface of reamer head has six left-handed guiding lands, carves to be formed behind between adjacent guiding land and carves convex surface.

Description

A kind of burnishing-in reamer for high-accuracy deep hole machining

Technical field

The utility model is related to the cutter fields of metal cutting process, are especially for the cutter of precision deep bore processing Field, specially a kind of burnishing-in reamer for high-accuracy deep hole machining.

Background technology

Usual circularity, dimensional accuracy, position degree and surface smoothness be required to higher aperture mostly and be using bore, it is thick expand, Essence expansion, the process slightly cut with scissors, finish reamed are processed, and also need to use longer, more accurate guide sleeve when for deep hole ream；Therefore Conventional deep hole machining is relatively high to the required precision of cutter, and the circular runout of cutter is difficult control after common deep hole bottoming reamer sharpening System, is affected to deep hole precision；And in order to ensure the machining accuracy of deep hole, it will usually be stayed more than smaller cutting for bottoming reamer Amount, but common bottoming reamer squeezes that cut not wear-resisting therefore service life low；Simultaneously common deep hole bottoming reamer because cutter it is outstanding deep longer And there is a problem of rigidity deficiency, when ream, is also easy to produce vibrations, and cutter is easily broken off and the circularity of deep hole and position degree are difficult guarantor Card.In actual processing production process, within some surface smoothnesses Ra0.8, within position degree 0.01mm and HRC45 with The hole machined of upper high hard material, in addition to having adopted traditional processing technology, it is also necessary to increase the endoporus grinding process that spreads out and just can guarantee hole Quality, but mill processing of spreading out treats that workpiece surface quality requirement is relatively high, and also the efficiency for mill processing of spreading out is low, labor intensity Greatly, therefore be not suitable for batch production, and toroidal or dolioform easily occurs in the hole for mill processing of spreading out, therefore processing quality often can not Meet technological requirement.

Utility model content

In view of the above-mentioned problems, the utility model provides a kind of burnishing-in reamer for high-accuracy deep hole machining, can solve The problem of certainly traditional deep hole processing cutter precision is low, service life is short, hole machined quality cannot be satisfied technological requirement.

Its technical solution is a kind of burnishing-in reamer for high-accuracy deep hole machining, it is characterised in that：It includes suitable successively Coaxial the first cylinder of integrally connected of sequence, the second cylinder and third cylinder, first cylinder are the reamer head of a diameter of d1, institute The neck that the second cylinder is a diameter of d2, and the diameter d2=d1-0.5mm of the neck are stated, the third cylinder is a diameter of The shank of d3, being intervally arranged on the peripheral surface of the reamer head has six left-handed guiding lands, the adjacent guiding land Between carve behind formed carve convex surface.

Further, the front end on the reamer head is equipped with burnishing-in sword and is oriented to the conical surface, and the burnishing-in sword is located at described lead To the rear side end of the conical surface, the periphery on the burnishing-in sword and the reamer head forms angle α, and angle α=10 °~20 °, described The cutting edge of burnishing-in sword is without relief angle.

Further, the width D for being oriented to land is (0.05~0.08) d1.

Further, the front end for being oriented to land is equipped with the back taper of (0.1~0.2)/100.

Further, angle β=5 °~10 ° being oriented between land and axis.

Further, length L1=(1~2) d1 on the reamer head, the length L1 on the reamer head and neck The sum of length L2 is more profound 5mm~10mm than the hole of parts to be processed.

Further, the high h in gap formed between convex surface and the outer circumference surface on the reamer head that carves is (0.01 ~0.03) d1.

Further, it is connected respectively by transition face between quarter convex surface and the guiding land of both sides, the quarter back of the body The angle formed between cambered surface and the transition faceFor obtuse angle.

Further, the angle

The beneficial effects of the utility model are：Which employs slotless designs, can be formed by way of cylindricalo grinding The guiding land on reamer head carves convex surface, thus the difficulty of processing of cutter is small and can ensure higher tool precision；Simultaneously When six left-handed guiding lands make workpiece on reamer head centripetal force with direction of feed on the contrary, so not only clamping securely and And chip-flowing work surface, it can effectively avoid chip from scratching machined surface, improve surface smoothness, and can effectively solve Certainly phenomenon in hole deflection and aperture horn mouth；In addition, being designed without relief angle for the burnishing-in cutting edge on its reamer head, can be effectively improved Cutting edge strength increases burnishing-in area, can more improve the finish of hole surface；And the guiding land on reamer head uses The wide land of (0.05~0.08) d1 designs, and so as to greatly increase guiding contact surface, ensure that the good position of hole machined Degree, it is ensured that machining accuracy；In addition, reamer head outer circle uses the big back taper of (0.1~0.2)/100, conventional reamers are breached Small back taper design, therefore substantially reduce and squeeze the torque generated, the extruding force that effective reduction is oriented to sword and the hole wall of rebound generates, The finish of hole surface is further improved, ensures processing quality；Finally, the angle β being oriented between land and axis is used 5 °~10 ° of low pitch angle design, thus stable cutting, with small vibration can be protected, it reliably prevents from bursting apart due to cutter tooth is big because vibrating, Therefore service life is long.

Description of the drawings

Fig. 1 is a kind of structural schematic diagram of burnishing-in reamer for high-accuracy deep hole machining of the utility model；

Fig. 2 be Fig. 1 A-A to enlarged structure schematic diagram；

Fig. 3 is enlarged structure schematic diagram at I in Fig. 2；

Fig. 4 is enlarged structure schematic diagram at II in Fig. 1；

Fig. 5 is the enlarged structure schematic diagram of B-B direction in Fig. 4.

Reference numeral：10- reamers head, 11- are oriented to land, and 12- carves convex surface, 13- burnishing-in swords, and 14- is oriented to the conical surface, 15- transition faces, 16- axis, 17- back tapers, 20- necks, 30- shanks.

Specific implementation mode

See Fig. 1 and Fig. 2, a kind of burnishing-in reamer for high-accuracy deep hole machining of the utility model comprising sequence successively The first cylinder of coaxial integrally connected, the second cylinder and third cylinder, the first cylinder are the reamer head 10 of a diameter of d1, the second circle Column is the neck 20 of a diameter of d2, and the diameter d2=d1-0.5mm of neck 20, third cylinder are the diameters for cutter clamping For the shank 30 of d3, being intervally arranged on 10 peripheral surface of reamer head has six left-handed guiding lands 11, adjacent guiding land It turns a millstone to be formed behind at quarter using grinding wheel between 11 and carves convex surface 12；Wherein length L1=(1~2) d1 on reamer head 10, reamer The sum of the length L1 on head 10 and the length of neck 12 L2 are more profound 5mm~10mm than the hole of parts to be processed；Carve convex surface 12 with The high h in gap formed between the outer circumference surface on reamer head 10 is (0.01~0.03) d1.

See that Fig. 4, the front end on reamer head 10 are equipped with burnishing-in sword 13 and are oriented to the conical surface 14, burnishing-in sword 13, which is located at, is oriented to the conical surface 14 Rear side end, the periphery on burnishing-in sword 13 and reamer head forms angle α, and angle α=10 °~20 °, and thus, it is possible to reduce axial direction Cutting resistance is effectively improved hole wall surface fineness；And burnishing-in sword 13 uses ultra-fine diamond grinding wheel without relief angle peripheral grinding, i.e., The cutting edge of burnishing-in sword 13 is without relief angle, and the γ in Fig. 5 is that the relief angle of burnishing-in sword 13 is illustrated, and γ=0 ° represents cutting edge without relief angle, energy Enough ensure cutter burnishing-in face surface quality, increases burnishing-in area.

And the width for being oriented to land 11 is D=(0.05~0.08) d1, therefore it can be effectively increased guiding contact area, ensure Good position degree；The front end for being oriented to land simultaneously uses the design of big back taper 17 of (0.1~0.2)/100, can reduce crowded The torque generated is pressed, effectively reduces and is oriented to the extruding force that the hole wall of land and rebound generates, improve hole surface finish；And it is oriented to Angle β between land 11 and axis 16 is designed using 5 °~10 ° of low pitch angle, can ensure stable cutting, with small vibration, have Effect prevents cutter tooth from bursting apart, tool life；.

See Fig. 3, carve and connected respectively by transition face 15 between convex surface 12 and the guiding land 11 of both sides, carves convex surface 12 The angle formed between transition face 15For obtuse angle, angleTo effectively prevent being oriented to 11 both sides of land point Point is excessively sharp and scratches hole wall, ensures the surface quality of hole machined.

To sum up, the burnishing-in reamer manufacture difficulty of the utility model is low, tool precision is high, and with good wearability and Cutter life is long, and can ensure higher hole surface finish and position degree, aperture impulse- free robustness after processing, it is ensured that deep hole Processing quality；So as to replace the grinding process that spreads out, greatly improves production efficiency, reduces production cost.

The specific implementation of the utility model is described in detail above, but content be only the utility model create compared with Good embodiment should not be construed as limiting the practical range of the utility model creation.All created according to the utility model is applied All the changes and improvements made by range etc. should all still belong within the patent covering scope of the utility model.

Claims (9)

1. a kind of burnishing-in reamer for high-accuracy deep hole machining, it is characterised in that：It includes that sequence is coaxial successively from front to back The first cylinder of integrally connected, the second cylinder and third cylinder, first cylinder is the reamer head (10) of a diameter of d1, described Second cylinder is the neck (20) of a diameter of d2, and the diameter d2=d1-0.5mm of the neck, and the third cylinder is diameter For the shank (30) of d3, being intervally arranged on reamer head (10) peripheral surface has six left-handed guiding lands (11), adjacent The guiding land (11) between carve behind formed carve convex surface (12).

2. a kind of burnishing-in reamer for high-accuracy deep hole machining according to claim 1, it is characterised in that：The reamer The front end on head (10) is equipped with burnishing-in sword (13) and is oriented to the conical surface (14), and the burnishing-in sword (13) is located at the guiding conical surface (14) Rear side end, the periphery of the burnishing-in sword (13) and the reamer head (10) forms angle α, and angle α=10 °~20 °, institute The cutting edge of burnishing-in sword (13) is stated without relief angle.

3. a kind of burnishing-in reamer for high-accuracy deep hole machining according to claim 2, it is characterised in that：The guiding The width D of land (11) is (0.05~0.08) d1.

4. a kind of burnishing-in reamer for high-accuracy deep hole machining according to claim 2, it is characterised in that：The guiding The front end of land (11) is equipped with the back taper (17) of (0.1~0.2)/100.

5. a kind of burnishing-in reamer for high-accuracy deep hole machining according to claim 2, it is characterised in that：The guiding Angle β=5 °~10 ° between land and axis.

6. a kind of burnishing-in reamer for high-accuracy deep hole machining according to claim 2, it is characterised in that：The reamer Length L1=(1~2) d1 on head (10), length L1 and the sum of the length of neck (20) the L2 ratios of the reamer head (10) wait for Process the profound 5mm~10mm in hole of part.

7. being existed according to a kind of any burnishing-in reamer for high-accuracy deep hole machining, feature in claim 1~6 In：It is described carve between convex surface (12) and the outer circumference surface on the reamer head (10) the high h in gap that is formed for (0.01~ 0.03)d1。

8. a kind of burnishing-in reamer for high-accuracy deep hole machining according to claim 7, it is characterised in that：The quarter back of the body Connect respectively by transition face (15) between cambered surface (12) and the guiding land (11) of both sides, the quarter convex surface (12) with it is described The angle formed between transition face (15)For obtuse angle.

9. a kind of burnishing-in reamer for high-accuracy deep hole machining according to claim 8, it is characterised in that：The angle