CN103921215B - The minimizing technology of burr on a kind of straight trough broaching tool - Google Patents
The minimizing technology of burr on a kind of straight trough broaching tool Download PDFInfo
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- CN103921215B CN103921215B CN201410128308.4A CN201410128308A CN103921215B CN 103921215 B CN103921215 B CN 103921215B CN 201410128308 A CN201410128308 A CN 201410128308A CN 103921215 B CN103921215 B CN 103921215B
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- peening
- burr
- straight trough
- broaching tool
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Abstract
The invention provides the minimizing technology of burr on a kind of straight trough broaching tool, in the method, the shot-peening of twice different angles is carried out by the rear knife face of shot blasting equipment to cutter tooth, the ball material that first shot-peening uses is carbonic acid clay glass or plastic cement sand, the ball material that second time shot-peening uses is aluminium oxide, during shot-peening, shot-peening is one by one carried out to the rear knife face of each cutter tooth.Because the shot-peening angle of twice shot-peening ball material that is different, that use is different, so can reach the effect coordinating and remove burr.The present invention on knife face while burr, also assures that integrality and the sharpness of blade, improves cutting wear and operating efficiency after effectively removing cutter tooth.
Description
Technical field
Field repaired by the cutter that the present invention relates in borings, particularly relates to the minimizing technology of burr on a kind of straight trough broaching tool.
Background technology
Broaching tool is the molding cutter for broaching, and broaching tool surface is provided with arranges cutter tooth more, and the size and dimension of each row's cutter tooth increases from incision end successively to cutting out end and changes.When broaching tool does broaching motion, each cutter tooth can cut certain thickness metal from workpiece, finally obtains required size and dimension.Broaching tool is everlasting because operating efficiency is high in batch or is processed circular hole, splined hole, keyway, plane etc. in a large amount of production.Broaching tool subjects the tension of varying strength, antitorque, resistance to compression, the load of impact and stress in broaching process, and the metallographic structure of its microcosmic can change along with the increase of service time, therefore needs in use for some time to carry out reconditioning to broaching tool in time.For straight trough broaching tool, it is a kind of broaching tool for roughing fluting, straight trough broaching tool needs after using a period of time to carry out reconditioning to its rake face, inevitably have at blade edge position the burr turning over knife face backward in reconditioning process, the conventional method removing burr has use bamboo chip to scrape against blade direction, or use copper sheet to scrape deburring, but these methods are all difficult to thoroughly remove burr residual on blade, and the operant level of these methods and workman is closely related, deal with the man-made further destroy that can cause broaching tool blade improperly, have a strong impact on cutter life.In addition, if carry out the operations such as coating after broaching tool reconditioning, there is the blade of damage, residual burr can have a strong impact on coating result.Therefore a kind of guarantee is needed to remove burr quality, the burr minimizing technology of the workload that reduces a staff.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method removing burr on straight trough broaching tool quickly and efficiently, to overcome the above-mentioned defect of prior art.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: the minimizing technology of burr on a kind of straight trough broaching tool, and described straight trough broaching tool comprises blade and cutter tooth, and described cutter tooth comprises rake face, rear knife face and blade, comprises the following steps:
One, after reconditioning is carried out to described rake face, first the blade of straight trough broaching tool and cutter tooth are cleaned;
Two, straight trough broach holder is held on shot blasting equipment, exposes cutter tooth;
Three, carry out first time shot-peening, shot-peening direction is perpendicular to rear knife face, and ball material is carbonic acid clay glass or plastic cement sand, carries out shot-peening one by one with the rear knife face of the spray gun on shot blasting equipment to each cutter tooth;
Four, after shot-peening terminates for the first time, adjustment angle of gun makes spray gun against the bearing of trend of burr, and becomes 30 ° ~ 45 ° angles with rear knife face, adopts aluminium oxide as ball material, carries out second time shot-peening one by one to the rear knife face of each cutter tooth;
Five, straight trough broaching tool is taken off from shot blasting equipment, complete the removal work to burr.
Preferably, in step 3 and step 4, the rear knife face shot-peening time of spray gun to each cutter tooth is 21s ~ 24s.
Further, the pressure of step 3 is 1 ~ 3bar.
Further, the pressure in step 4 is 1 ~ 5bar.
Further, during twice shot-peening, the jet velocity of spray gun is about 80mm/s.
As mentioned above, the minimizing technology of burr on a kind of straight trough broaching tool of the present invention, has following beneficial effect:
The burr that blasting technology has been applied to straight trough broaching tool by the present invention is removed technically, by carrying out the shot-peening of twice different angles to the rear knife face of cutter tooth, not only effectively can remove burr residual on rear knife face, also effectively ensure that integrality and the sharpness of blade, on the rear knife face of cutter tooth, create compressive stress layer simultaneously, improve cutting wear.The present invention uses shot blasting equipment to carry out blasting operation, man's activity to be dropped to minimum, ensures operating efficiency, has promotional value widely.
Accompanying drawing explanation
Fig. 1 is the structure chart of straight trough broaching tool in the present invention.
Fig. 2 is the present invention's first time shot-peening schematic diagram.
Fig. 3 is the partial enlarged drawing at A place in Fig. 2.
Fig. 4 is the present invention's second time shot-peening schematic diagram.
In figure: 1 blade
2 cutters tooth
21 rake faces
Knife face after 22
23 blades
3 burrs
Detailed description of the invention
The structure that Figure of description illustrates, ratio, size etc., content all only in order to coordinate description to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, is not affecting under effect that the present invention can produce and the object that can reach, and all should still drop in scope that disclosed technology contents can contain.Simultaneously, quote in this description as " on ", D score, "front", "rear", the term such as " centre ", also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Be the structure chart of straight trough broaching tool 1 as shown in Figure 1 and Figure 4, straight trough broaching tool 1 comprises blade 1 and cutter tooth 2, and described cutter tooth 2 comprises rake face 21, rear knife face 22 and blade 23, and after carrying out reconditioning to rake face 21, the burr 3 of generation turns over knife face 22 backward from rake face 21.Fig. 2 and Fig. 4 is the process schematic of deburring of the present invention, the present invention includes following operating procedure:
First the blade 1 of straight trough broaching tool and cutter tooth 2 are cleaned, can be immersed in alcohol for the straight trough broaching tool that size is less and clean, the method for manual wipping will be adopted to clean for larger-size straight trough broaching tool.By alcohol or other cleaning agents, the cutting fluid remained on straight trough broaching tool is thoroughly cleaned in this step, the failure preventing from residual cutting fluid from adhering to ball material when shot-peening causing deburring effect.
After straight trough broaching tool is cleaned, is held in by straight trough broach holder on shot blasting equipment and exposes blade 23, straight trough broaching tool is placed and steadily prepares first time shot-peening, shot blasting equipment is provided with spray gun.
In the present embodiment, as shown in Figure 2 and Figure 4, before first time shot-peening, the data such as pressure, shot-peening time and jet velocity are input in the controller of shot blasting equipment, then adjusting shot-peening direction makes spray gun perpendicular to rear knife face 22, spray gun is about 100mm apart from the distance of rear knife face 22, ball material to be diameter be carbonic acid clay glass or the plastic cement sand of 150 ~ 250 μm.In the present embodiment, pressure is 1 ~ 3bar, be preferably 1.7bar, the rear knife face 22 shot-peening time of spray gun to each cutter tooth 2 is 21s ~ 24s, jet velocity is 80mm/s, after spray gun is adjusted, start using the end of straight trough broaching tool as initial end to carry out shot-peening to the rear knife face 22 of each cutter tooth 2 successively.As shown in Figure 2, the end of straight trough broaching tool is exactly low order end in the present embodiment, because the height of a rear cutter tooth 2 is higher than the rear knife face 22 of previous cutter tooth 2, so ball material can not be ejected on the rear knife face 22 of previous cutter tooth 2 when shot-peening, avoid repetition shot-peening, ensure that spray gun carries out shot-peening to each rear knife face 22 in official hour.This shot-peening effectively can remove the small burr remained on rear knife face 22, simultaneously because the hardness of carbonic acid clay glass and plastic cement sand is lower, burr can not be caused to tear when removing burr 3 and cause blade 23 to occur the situation of crackle, breach, effectively protecting blade 23; This shot-peening by more greatly, harder burr bending is turned over, can reduce burr 3 and the adhesiveness of rear knife face 22, thoroughly removes burr 3 when being convenient to next shot-peening in addition.
As shown in Figure 3 and Figure 4, after first time, shot-peening terminated, spray gun is readjusted to initial end and prepares second time shot-peening.In this shot-peening, adjustment angle of gun makes spray gun against the bearing of trend of burr 3, and 30 ° ~ 45 ° angles in shot-peening direction and rear knife face 22 one-tenth change ball material simultaneously.The ball material that this shot-peening uses to be diameter the be aluminium oxide of about 150 ~ 250 μm, pressure is 1 ~ 5bar, is preferably 2bar.Shot-peening time of this shot-peening, jet velocity and spray gun are consistent apart from the Distance geometry first time shot-peening of rear knife face 22.After adjusting Burners Positions, successively second time shot-peening is carried out to the rear knife face 22 of each cutter tooth.After second time shot-peening terminates, straight trough broaching tool is taken off from shot blasting equipment, completes the removal work to burr 3.Use aluminium oxide to be because its density is high as ball material reason in this shot-peening, and there is sharp-pointed angular structures, removal that can be quick, neat residual more greatly, comparatively bristle thorn, and further small burr to be removed.In this shot-peening; because ball material is harder; consider the protection to blade 23; so injection direction be facing to burr 3 turn over to side; namely carry out shot-peening along rear knife face 22 to blade 23 direction; effectively ensure that blade 23 integrality at this angle shot-peening, also on rear knife face 22, define certain compressive stress layer simultaneously, increase hardness and the intensity of rear knife face 22.
In the present invention, angle between the injection direction of second time shot-peening and rear knife face 22 is that inventor draws through lot of experiments, select the reason of this scope to be: if angle is too little, the residual burr 3 in blade 23 place cannot thoroughly be removed, and can not reach the effect removing burr; Angle too conference causes damage to blade 23, and blade 23 sharpness is declined.Therefore, inventor determines with in the scope of rear knife face 22 one-tenth 30 ° ~ 45 ° in shot-peening direction the most at last.
The pressure of the time of the shot-peening in the present invention, the speed of injection, shot-peening all will increase along with the increase of burr hardness.In the present embodiment, after spray gun distance cutter tooth 2, the jet length of knife face 22 will be determined according to the width of knife face 22 after cutter tooth 2, when the width of rear knife face 22 is less, and by the Distance Shortened between spray gun and rear knife face 22; When the width of rear knife face 22 is larger, the distance between spray gun and rear knife face 22 be increased, the object adjusted like this guarantees that rear knife face 22 can be sprayed onto uniformly, and will try one's best and only carry out shot-peening to knife face 22 after and do not affect knife face after other.
In sum, the minimizing technology of burr on a kind of straight trough broaching tool of the present invention, can solve burr on straight trough broaching tool and remove inconvenient, halfway problem.So the present invention effectively overcomes practical problems more of the prior art thus has very high value and use meaning.
Above-mentioned embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.The present invention also has many aspects can improve under the prerequisite of overall thought, all without prejudice under spirit of the present invention and category, can modify above-described embodiment or change for person skilled in the art scholar.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (5)
1. the minimizing technology of burr on a straight trough broaching tool, described straight trough broaching tool comprises blade (1) and cutter tooth (2), described cutter tooth (2) comprises rake face (21), rear knife face (22) and blade (23), it is characterized in that comprising the following steps:
One, after reconditioning is carried out to described rake face (21), first the blade (1) of straight trough broaching tool and cutter tooth (2) are cleaned;
Two, straight trough broach holder is held on shot blasting equipment, exposes cutter tooth (2);
Three, carry out first time shot-peening, shot-peening direction is perpendicular to rear knife face (22), and ball material is carbonic acid clay glass or plastic cement sand, carries out shot-peening one by one with the rear knife face (22) of the spray gun on shot blasting equipment to each cutter tooth (2);
Four, after shot-peening terminates for the first time, adjustment angle of gun makes spray gun against the bearing of trend of burr (3), and become 30 ° ~ 45 ° angles with rear knife face (22), adopt aluminium oxide as ball material, one by one second time shot-peening is carried out to the rear knife face (22) of each cutter tooth (2);
Five, straight trough broaching tool is taken off from shot blasting equipment, complete the removal work to burr (3).
2. the minimizing technology of burr on a kind of straight trough broaching tool according to claim 1, is characterized in that: in step 3 and step 4, rear knife face (22) the shot-peening time of spray gun to each cutter tooth (2) is 21s ~ 24s.
3. the minimizing technology of burr on a kind of straight trough broaching tool according to claim 1, is characterized in that: the pressure of step 3 is 1 ~ 3bar.
4. the minimizing technology of burr on a kind of straight trough broaching tool according to claim 1, is characterized in that: the pressure in step 4 is 1 ~ 5bar.
5. the minimizing technology of burr on a kind of straight trough broaching tool according to claim 1, is characterized in that: during twice shot-peening, the jet velocity of spray gun is 80mm/s.
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| CN201410128308.4A CN103921215B (en) | 2014-04-01 | 2014-04-01 | The minimizing technology of burr on a kind of straight trough broaching tool |
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| CN201410128308.4A CN103921215B (en) | 2014-04-01 | 2014-04-01 | The minimizing technology of burr on a kind of straight trough broaching tool |
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| CN103921215B true CN103921215B (en) | 2016-04-27 |
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