Skill of work of high speed deep Kong Jia

The development that high speed machines also drove the progress of cutting tool technology. The domain is machined in deep aperture, not only the treatment deepness of aperture becomes longer, qualitative change gets processes material to be hard to machine more, and more and more severe also to machining the environmental protection of the spot to ask. For this, the high speed deep aperture that gets used to deep Kong Jia to be versed in the condition changes machines broach emerge as the times require. In treatment of high speed deep aperture, wait for a phenomenon to avoid to produce bits of collapse blade, platoon to jam, most manufacturer is to use the gun of low feed speed to get normally, or broach of lengthen of use high-speed steel undertakes type of a flight of stairs is machined. Current, a kind of new-style bit that can be used at high speed deep aperture to machine -- FTO-GDXL brought new breakthrough for craft of this one treatment. The helix chamfer that FTO-GDXL has bit of can smooth platoon (show 1 times like the graph) , in treatment, carry the joint action of helix chamfer and horizontal blade, but will cut bits mincing generate petty cut bits, make the helix chamfer that has enough space can will cut bits smooth eduction. Because the approach of broach is very long, to avoid to produce collapse blade phenomenon, the material of cutting tool used pulverous high-speed steel character in special be able to bear or endure the advanced material of collapse caustic. With before coating photograph is compared, TIALN surface coating raised the smooth sex of cutting tool, be helpful for discharging bits smoothly. Treatment of high-carbon steel deep aperture because of cutting tool dangerous long very long, below the circumstance that does not have feed hole, of broach cut a meeting generation to shake, make the entrance diameter of aperture greatens, cutting tool life also can be reduced. When using this bit so, feed hole is necessary, should use short blade first model make alloy broach forcedly undertake feed hole is machined, the diameter of feed hole is more than broach diameter slightly 0.

02 ～ 0.

1mm, horn should is equal to before or be more than the dimension of broach, such broach can begin to be cut from central ministry, make precision of cutting tool life, treatment and treatment stability are achieved optimal. Here, the treatment requirement that fits most is: ● cutting material: High-carbon steel S50C; ● aperture: 6mm; ● hole depth: 120mm blind aperture (20xD) ; Dimension of ● feed hole: φ 6.

1mm, before horn 140 ° ; ● feed hole is deep: 6mm; ● machines machinery: Horizontal M/C BT50; ● cutting speed: 90m/min; ● feed speed: 0.

2 ～ 0.

5mm/r; ● cutting is oily: Water-solubility cutting is oily; Hydraulic pressure of ● cooling fluid: 7Mpa. Be gotten with use gun or high-speed steel lengthen broach undertakes deep aperture machines photograph comparing, 6 the highest treatment efficiency of FTO-GDXL is gun getting.

5 times, it is 15 times what high-speed steel lengthen gets. When undertaking machining with FTO-GDXL, if the graph is shown 2 times,its cutting fights force, the graph below the case that gives in Gao Jin is smooth, as the addition of hole depth, cutting fights force and did not increase, and platoon bits is smooth, without jam phenomenon. When feed ordinal when increasing, the life of cutting tool, even if the deep aperture that machines 20 times diameter, why planting no matter below treatment condition, treatment opening number is in 800 aperture above (above of cutting length 97m) . If the bore diameter change in machining a process expresses 1 to show. The enlarge of aperture is in great quantities: Orifice 0.

01mm is the following, among 0.

003 ～ 0.

007mm, hole bottom 0 ～ 0.

004mm. In the enlarge of aperture a large number of so little state of affairses fall, hole wall is bright and clean degree very good however, have Ry3 only.

Ry7 of ～ of 50 μ M.

04 μ M. This shows, can achieve a bit with FTO-GDXL the smooth, cutting treatment that did not shake. When Nextpage undertakes with lengthen broach Kong Jia is versed in, the verticality of aperture is a crucial question. Use the opening that FTO-GDXL machines, arrive from orifice the verticality of hole bottom is extremely tall. Deeper aperture (hole depth 30 × D) treatment is in this treatment case, treatment material is SCM415H character, this kind of material cuts bits character very petty, very easy felt, cause a bits easily to jam, for this, adoption treatment requirement is: ● cutting material: SCM415H; ● aperture: 5mm; ● hole depth: 150mm blind aperture, 140mm of effective treatment hole depth (28 × D) ; ● machines machinery: Horizontal M/C BT40; ● stage style machines: Without; ● cutting speed: 60m/min; ● feed speed: 0.

3mm/r; ● cutting is oily: Water-solubility; Hydraulic pressure of ● cooling fluid: 3Mpa; Does ● feed hole machine: ? ? .

1 make alloy bit forcedly, deepness 10mm; ● low rotate speed inserts feed hole, after inserting, achieve appoint rotate speed resumptive treatment, fall again after treatment for low rotate speed. In this treatment condition falls, use FTO-GDXL to machine the hole depth get sth done without any letup of 30 times diameter, machine an aperture to need 19s only, and the handling time that traditional gun gets is 90s above. MQL is machined in recent years, as the attention to treatment spot environmental protection, half dry type is machined more and more be favorred. In automobile manufacturing industry, the treatment of main part begins the engine such as lid of crankshaft, cylinder body, crock use MQL to machine means. Among them, the oily aperture on crankshaft is 10 ～ mostly the deep aperture of 20 times diameter, if use traditional treatment method to undertake machining, stability of life of handling time, cutting tool, treatment is the difficulty in treatment. A case that uses FTO-GDXL to undertake to S50C MQL is machined is below, treatment condition is: ● cutting material: High-carbon steel S50C; ● aperture: 6mm; ● hole depth: 100mm via (17xD) ; ● machines machinery: Horizontal M/C HSK63A; ● cutting speed: 90m/min; ● feed speed: 0.

2mm/r; ● cutting is oily: MQL; ● sparge gives pressure: 0.

4Mpa; ● sparge supply is measured: 50cc/h; Dimension of ● feed hole: 6.

05, before horn 150 ° ; ● guides hole depth spends: 6mm. Use FTO-GDXL to undertake to S50C MQL is machined, its cutting length is 100m, life is longer, and broach still can undertake again abrade, reuse, obtain follow to taste same cutting length newly. Visible, FTO-GDXL is the high speed that can undertake tall difficulty is machined deep aperture treatment uses bit, beyond the S50C that the material that its can process introduces besides above character, SCM415H, still FC250, SCM440, SCM420H, SCr420H, SNCM439 waits, bigger to machining difficulty even SUS420J2, 15-5PH, SKD11 (had not handled) wait for material to also can undertake 10 ～ character of 30 times diameter be versed in into Kong Jia without halt. CNC Milling