CN105352631B - Frictional heat accounts for the assay method of overall cutting heat ratio in a kind of process - Google Patents
Frictional heat accounts for the assay method of overall cutting heat ratio in a kind of process Download PDFInfo
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- CN105352631B CN105352631B CN201510704385.4A CN201510704385A CN105352631B CN 105352631 B CN105352631 B CN 105352631B CN 201510704385 A CN201510704385 A CN 201510704385A CN 105352631 B CN105352631 B CN 105352631B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
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Abstract
It is an object of the invention to provide the assay method that frictional heat in a kind of material removal process accounts for overall cutting heat ratio, and so as to solve the problems, such as that it is clear and definite that cutting heat source is difficult to, basis is provided effectively to reduce cutting temperature.The existing measurement to cutting temperature is only capable of obtaining caused temperature in cutting process, it is difficult to which effective district divides the source of cutting temperature.A kind of method that the present invention detects by using frictional heat, the frictional heat in process is separated with cutting heat, so as to realize the contrast of two kinds of heats.The present invention can accurately judge the ratio in cutting heat shared by frictional heat by contrasting caused cutting temperature and friction temperature caused by cutter and machined material friction during conventional drilling；By the Accurate Determining to cutting heat source, the rapid Optimum of cutter material in process, cutting parameter is advantageously implemented.
Description
Technical field
The present invention relates to material processing research field, and in particular to frictional heat accounts for overall cutting in a kind of process
The assay method of hot ratio.
Background technology
In material processing, substantial amounts of cutting heat is generally produced.The measure in cutting heat source is for lowering cutting temperature
It is most important.Only on the basis of cutting heat origin, effective method for reducing cutting temperature could be proposed.Material is processed
During, by elastic properties of materials deform caused by cutter and machined material between frictional heat be cutting heat important sources it
One.
In plastic material process, the plastic deformation of material is the important sources of cutting heat.However, in fragile material
In working angles, because the plastic deformation ability of fragile material is smaller, i.e., just produced in the case of less plastic deformation broken
Phenomena such as, therefore the cutting heat as caused by plastic deformation is generally smaller in fragile material working angles, and cutter and processed material
Frictional heat between material is the main source of cutting heat.Particularly in drilling process, because cutting zone is semiclosed form,
Cutting heat is difficult to effective and extraneous carry out heat exchange, causes the temperature of cutting zone higher, influence of the frictional heat to cutting temperature
It is bigger.Can how frictional heat accounts for the ratio of overall cutting heat in effective judgement material working angles, be that effectively reduce cutting temperature
The key factor of degree, and the important foundation of the research such as cutting tool choice, process optimization.
The content of the invention
In view of defects in the prior art, the present invention provides frictional heat in a kind of material removal process and accounts for overall cutting heat
The assay method of ratio, so as to solve the problems, such as that it is clear and definite that cutting heat source is difficult to, base can be provided effectively to reduce cutting temperature
Plinth, it is also beneficial to the research of cutting tool choice, process optimization.
It is that frictional heat accounts for entirety in a kind of material removal process to reach above-mentioned purpose the technical solution adopted in the present invention
The assay method of cutting heat ratio, it comprises the following steps：
（1）Cutter rotating speed and the amount of feeding are set, carry out drilling experiment, detects the temperature during drilling, and record cutting
Time；
（2）Drilling again is carried out using identical cutter rotating speed and the amount of feeding to test, when the one of drilling to machined material
When determining thickness, stop the motion of cutter；
（3）Treat step（2）In machined material completely cooling after, set and step（1）Consistent rotating speed, is fed simultaneously
Amount is zero, rotates cutter；
（4）Work as step（3）The rotational time and step of middle cutter（1）When the cutting time of middle record is consistent, detection temperature；
（5）Calculation procedure（4）Middle temperature change and step（1）The ratio of middle temperature change, obtain frictional heat and account for cutting heat
Ratio.
Step（1）Described in the detection of temperature use infrared radiation thermometer.
It is preferred that step（2）Tested to carry out drilling again using identical cutter rotating speed and the amount of feeding, when drilling is extremely added
During the half of work material thickness, stop the motion of cutter.Reason is that the temperature value measured at the half of material is the most accurate.
Because the area of dissipation of material surface is big, the temperature of material surface is relatively low, measures obtained temperature and actual cut temperature spread
It is larger, after being machined to material internal certain depth, resulting temperature is measured closer to actual cut temperature.
Step（4）Described in the detection of temperature use infrared radiation thermometer.
Step（1）Described in detection and step（4）Described in the position of measurement point detected be consistent.
Beneficial effects of the present invention：The existing measurement to cutting temperature is only capable of obtaining caused temperature in cutting process
Degree, it is difficult to which effective district divides the source of cutting temperature；The present invention is by contrasting caused cutting temperature and knife during conventional drilling
Friction temperature caused by tool and machined material friction, can accurately judge the ratio in cutting heat shared by frictional heat；
By the Accurate Determining to cutting heat source, the rapid Optimum of cutter material in process, cutting parameter is advantageously implemented.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is described further：
Fig. 1 is machining schematic diagram；
Fig. 2 is the change of cutting temperature in process；
Fig. 3 is friction temperature change.
In figure：1st, cutter, 2, machined material.
Embodiment
The ratio of overall cutting heat is accounted for for frictional heat in research process, it is compound to carbon fiber using hard alloy cutter
Material has carried out drilling experiment.Frictional heat accounts for the assay method of overall cutting heat ratio, its feature in a kind of material removal process
It is to comprise the following steps：
（1）Set that cutter rotating speed is 5000r/min and the amount of feeding is 30mm/min, composite thickness of slab is 12mm, cutter
Diameter of phi 5mm, cutting test is carried out, processing temperature is detected using infrared radiation thermometer, and records the cutting time to be
24s, the results showed that the temperature in process first rises to be declined afterwards.This is due to that composite panel has certain thickness,
When being processed to composite, temperature is gradually increasing；After cutter drills through composite, temperature is gradually reduced.Meanwhile can
To find out processing total time as 24s, when process time is 17s, processing temperature is up to 230 DEG C.
（2）Drilling experiment is carried out to carbon fibre composite using hard alloy cutter again, composite thickness of slab is
12mm, machined parameters are used as cutter rotating speed 5000r/min, tool feeding amount 30mm/min carries out drilling processing, drilling about 6mm
Stop tool feeding and main shaft rotation afterwards.
（3）Treat step（2）In machined material cooling 15min so that workpiece recovers to environment temperature.
（4）Setting and step（1）Consistent rotating speed 5000r/min, while amount of feed is zero, rotates cutter
, and temperature is detected using infrared radiation thermometer, continue 120s.As a result show, over time, friction
Caused temperature gradually rises.
（5）Calculation procedure（4）In the temperature and step measured（1）In ratio between the temperature measured, rubbed
Chafing accounts for the ratio of cutting heat.
Step（1）Described in detection and step（4）Described in the position of measurement point detected be consistent.
According to the change of temperature in drilling process and the change of friction temperature, you can obtain frictional heat during different time points
Account for the ratio of overall cutting heat.For example, when the time is 17s, drilling temperature reaches 230 DEG C of peak, while friction temperature is
101.5℃.Friction temperature and the ratio of drilling temperature are that frictional heat accounts for the ratio for cutting heat.Therefore, when the time is 17s, rub
The ratio that chafing accounts for overall cutting heat is 101.5/230 × 100%=44.1%.
The same time in Fig. 2 and Fig. 3, the temperature value measured corresponds, can be with the overall machining time
0-24s ratio is calculated, so as to obtain the ratio that frictional heat accounts for overall cutting heat, but the value at 17s is the most accurate.
Claims (5)
1. frictional heat accounts for the assay method of overall cutting heat ratio in a kind of material removal process, it is characterised in that including following step
Suddenly：
（1）Cutter rotating speed and the amount of feeding are set, carry out drilling experiment, detects the temperature during drilling, and record the cutting time；
（2）Drilling again is carried out using identical cutter rotating speed and the amount of feeding to test, when drilling to machined material certain thickness
When, stop the motion of cutter；
（3）Treat step（2）In machined material completely cooling after, set and step（1）Consistent rotating speed, while amount of feed is
Zero, rotate cutter；
（4）Work as step（3）The rotational time and step of middle cutter（1）When the cutting time of middle record is consistent, detection temperature；
（5）Calculation procedure（4）Middle temperature change and step（1）The ratio of middle temperature change, obtain the ratio that frictional heat accounts for cutting heat
Example.
2. frictional heat accounts for the assay method of overall cutting heat ratio in a kind of material removal process according to claim 1,
It is characterized in that：Step（1）Described in the detection of temperature use infrared radiation thermometer.
3. frictional heat accounts for the assay method of overall cutting heat ratio in a kind of material removal process according to claim 1,
It is characterized in that：Step（2）Tested to carry out drilling again using identical cutter rotating speed and the amount of feeding, when drilling is to being processed
During the half of material thickness, stop the motion of cutter.
4. frictional heat accounts for the assay method of overall cutting heat ratio in a kind of material removal process according to claim 1,
It is characterized in that：Step（4）Described in the detection of temperature use infrared radiation thermometer.
5. frictional heat accounts for the assay method of overall cutting heat ratio in a kind of material removal process according to claim 1,
It is characterized in that：Step（1）Described in detection and step（4）Described in the position of measurement point detected be consistent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510704385.4A CN105352631B (en) | 2015-10-27 | 2015-10-27 | Frictional heat accounts for the assay method of overall cutting heat ratio in a kind of process |
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| CN201510704385.4A CN105352631B (en) | 2015-10-27 | 2015-10-27 | Frictional heat accounts for the assay method of overall cutting heat ratio in a kind of process |
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| CN105352631A CN105352631A (en) | 2016-02-24 |
| CN105352631B true CN105352631B (en) | 2017-11-10 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694406A (en) * | 2009-10-09 | 2010-04-14 | 南京林业大学 | Device for testing cutting temperature of wood cutting tool |
| CN103927450A (en) * | 2014-01-22 | 2014-07-16 | 黑龙江科技大学 | Cutting parameter determining method for combined machining of cutting tool and high-temperature alloy |
| CN104515714A (en) * | 2015-01-07 | 2015-04-15 | 北京林业大学 | High-speed high-temperature hydraulic load-adjustable knife-chip friction device and friction measuring method |
| CN104615876A (en) * | 2015-01-28 | 2015-05-13 | 大连理工大学 | Calculation method for cutting heat distribution coefficients of composite material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101436234B1 (en) * | 2012-01-31 | 2014-08-29 | 도시바 기카이 가부시키가이샤 | Measurement method of cutting machine temperature |
-
2015
- 2015-10-27 CN CN201510704385.4A patent/CN105352631B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694406A (en) * | 2009-10-09 | 2010-04-14 | 南京林业大学 | Device for testing cutting temperature of wood cutting tool |
| CN103927450A (en) * | 2014-01-22 | 2014-07-16 | 黑龙江科技大学 | Cutting parameter determining method for combined machining of cutting tool and high-temperature alloy |
| CN104515714A (en) * | 2015-01-07 | 2015-04-15 | 北京林业大学 | High-speed high-temperature hydraulic load-adjustable knife-chip friction device and friction measuring method |
| CN104615876A (en) * | 2015-01-28 | 2015-05-13 | 大连理工大学 | Calculation method for cutting heat distribution coefficients of composite material |
Non-Patent Citations (1)
| Title |
|---|
| 对金属切削中温升的探究;李延铎 等;《天津理工学院学报》;19931231;第40-47页 * |
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