CN113145910A - Method for machining blind key groove on workpiece - Google Patents
Method for machining blind key groove on workpiece Download PDFInfo
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- CN113145910A CN113145910A CN202110232667.4A CN202110232667A CN113145910A CN 113145910 A CN113145910 A CN 113145910A CN 202110232667 A CN202110232667 A CN 202110232667A CN 113145910 A CN113145910 A CN 113145910A
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- cutter bar
- key groove
- positioning sleeve
- hole
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000003754 machining Methods 0.000 title claims description 24
- 238000005520 cutting process Methods 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims 3
- 238000010168 coupling process Methods 0.000 claims 3
- 238000005859 coupling reaction Methods 0.000 claims 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 241000227425 Pieris rapae crucivora Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/28—Grooving workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
Abstract
The invention discloses a method for processing a blind key groove on a workpiece, which comprises the following steps: s1, mounting the workpiece on a guide device; matching a cutter bar provided with a cutting tool with a cutter bar guide post matched with a guide device; s3, the cutter bar is fed by D along the radial direction of the workpiece each time under the control of the numerical control machine; s4, the cutter bar returns to the initial position of axial feeding once per axial feeding under the control of the numerical control machine, the steps S3 and S4 are repeated in this way to cut the workpiece, and a blind key groove consisting of a key groove body and a tool withdrawal groove is processed on the workpiece; the method of the invention can form a novel tool withdrawal type blind key groove.
Description
Technical Field
The invention relates to the technical field of key groove machining, in particular to a method for machining a blind key groove on a workpiece.
Background
The continuous casting roller is a main part of a continuous casting machine, and 2-4 roller sleeves are assembled into the roller assembly through a mandrel and a key. The quality of the manufacturing size precision and the position precision of the roller sleeve key groove is a key factor for ensuring the smooth assembly of the component.
A Bao steel 2# continuous casting transformation project is an Olympic steel PT technology, and a roller structure form is a roller sleeve type, and a group form is assembled by small gaps of three roller sleeves. The key grooves in the inner holes of the roller sleeves at the two ends are blind key grooves, and the key grooves in the inner holes of the middle roller sleeve are through key grooves.
The key groove in the inner hole of the scoring roller sleeve is conventionally machined by adopting a common B5050 slotting machine, adopting linear reciprocating motion and using a common white steel blade for machining and forming; the conventional processing mode has the following defects:
1. due to the influence of the cutter, the conventional machining needs multiple times of machining on the width;
2. in the product, as the size precision of the key slot is generally Js9, the symmetry requirement is generally within 0.05, and the conventional processing has certain difficulty;
3. due to the equipment factor and the linear reciprocating motion processing, a special annular tool withdrawal groove 9 needs to be designed at the bottom of the key groove 5. The requirement of a special tool withdrawal groove 9 (as shown in figure 10) is intermediate, the production cost is high, the processing time is long, and the strength of the product is reduced.
4. Although the cutting tool can be removed and broken through the annular relief groove 9, a part of the broken chips still remain in the relief groove 9 during machining, and the cutting tool is likely to contact the broken chips during machining, thereby causing a problem of edge jump.
Disclosure of Invention
The invention provides a method for processing a blind key groove on a workpiece in a novel tool retracting mode.
The processing method of the blind key groove on the workpiece comprises the following steps:
s1, mounting the workpiece on a guide device;
s2, matching the cutter bar provided with the cutting tool with a cutter bar guide post matched with a guide device;
s3, the cutter bar is fed by D along the radial direction of the workpiece each time under the control of the numerical control machine;
s4, feeding the cutter along the axial direction of the workpiece by the cutter bar under the control of a numerical control machine tool according to the following formula, returning the cutter bar to the initial position of the axial feeding once per axial feeding, repeating the steps S3 and S4 to cut the workpiece, and processing a blind key groove consisting of a key groove body and a tool withdrawal groove on the workpiece;
L0＝L+L1-(n-1)×d
in the above formula, H1 is the machining depth of the key groove body, N is the total number of cutting times, L0 is the axial feed size of each time along the workpiece, L is the machining length of the key groove body along the axial direction of the workpiece, L1 is the machining length of the tool withdrawal groove along the axial direction of the workpiece, N is the natural number corresponding to the cutting between the 1 st time and the nth time, and d is the difference between any two adjacent axial feeds.
The invention has the following advantages:
1. the form of a conventional radial annular tool withdrawal groove is changed, the tool withdrawal groove with an inclined plane arc-shaped surface is simultaneously processed in the process of processing the key groove body, and the tool withdrawal groove with the structure is in a novel tool withdrawal form;
2. the requirement of processing a radial annular tool withdrawal groove by a lathe is eliminated, a new tool withdrawal structure is formed by adopting a numerical control machining mode similar to broaching, and a blind key groove consisting of a key groove body and the tool withdrawal groove is processed at the same time, so that the advantages of time saving and high production efficiency are achieved;
3. by adopting a forming blade, the cutting amount is small (conventionally, the feeding is carried out every time by 0.03-0.05 mm), and a rapid cutting mode is adopted, so that the dimensional precision and the roughness of a product are ensured, and the cutting edge of a cutting tool can be prevented from jumping;
4. the positioning mode of the invention changes the mode of an original slotting machine for aligning the excircle or the inner hole of a product and a side bus and the mode of ensuring the linearity and the symmetry of the key slot.
Drawings
FIG. 1 is a cross-sectional view of a guide device according to the present invention;
FIG. 2 is a perspective view of the guide of the present invention;
FIG. 3 is a schematic view of an upper retaining sleeve;
FIG. 4 is a schematic view of a lower retaining sleeve;
FIG. 5 is an enlarged view of section I of FIG. 1;
FIG. 6 is a schematic view of a first type of blind keyway formed by the method of the present invention;
FIG. 7 is an enlarged view of portion P of FIG. 6;
FIG. 8 is a schematic view of a second type of blind keyway formed by the method of the present invention;
FIG. 9 is an enlarged view of portion Q of FIG. 8;
FIG. 10 is a schematic view of a prior art keyway in a roll shell;
reference numbers in the drawings:
the tool comprises a workpiece A, an upper locating sleeve 1, a first abdicating notch 1a, a first end face combining part 1b, a first inner hole combining part 1c, a first central hole 1d, a lower locating sleeve 2, a second abdicating notch 2a, a second end face combining part 2b, a second inner hole combining part 2c, a second central hole 2d, a driving mechanism 3, a pressing plate 4, a key groove body 5, a top cap 6, a limiting part 6a, a first assembling hole 6b, a second assembling hole 6c, an adjusting pad 7, a locking screw 8, a tool withdrawal groove 9, a cutting tool 10, a tool bar guide column 11, a sliding assembling groove 11a and a tool bar 12.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 9.
The work piece A of this embodiment processing prefers to use the roller shell, and the hole on this roller shell is the through-hole, processes out the keyway on the hole wall face of work piece A hole promptly to this keyway is blind keyway.
The processing method of the blind key groove on the workpiece comprises the following steps:
s1, mounting the workpiece A on a guide device; the guide device includes: the device comprises an upper positioning sleeve 1 in clearance fit with one end of an inner hole of a workpiece A, a lower positioning sleeve 2 in clearance fit with the other end of the inner hole of the workpiece A and a pressing assembly, wherein a first abdicating notch 1a for a cutter bar 12 to move along the radial direction of the upper positioning sleeve 1 is formed in the upper positioning sleeve 1; the lower locating sleeve 2 is provided with a second abdicating notch 2a for the cutter bar 12 to move along the radial direction of the lower locating sleeve 2, and the compressing component is matched with the upper locating sleeve 1 to position the workpiece between the upper locating sleeve 1 and the lower locating sleeve 2.
Go up position sleeve 1 and include and form the first terminal surface joint part 1b, the first hole joint part 1c that support with work piece axial terminal surface, first breach of stepping down 1a sets up on first terminal surface joint part 1b, and first hole joint part 1c is connected with the one end of first terminal surface joint part 1 b. The first end face combining component 1b is provided with a first central hole 1d, the first central hole 1d is used for the cutter bar 12 to pass through, and the first abdicating notch 1a is communicated with the first central hole 1 d. The first inner hole combining part 1c is cylindrical or conical, and in this embodiment, the first inner hole combining part 1c is cylindrical.
The lower positioning sleeve 2 comprises a second end surface combining component 2b and a second inner hole combining part 2c which are abutted against the axial end surface of the workpiece, and the second abdicating notch 2a is arranged on the second end surface combining component 2 b; the second inner hole combining part 2c is connected with one end of the second end face combining part 2b, a second center hole 2d is formed in the second end face combining part 2b, the second center hole 2d is used for the cutter bar 12 to penetrate through, and the second abdicating notch 2a is communicated with the second center hole 2 d. The second inner hole combining part 2c is cylindrical or conical, and in this embodiment, the second inner hole combining part 2c is cylindrical.
The pressing assembly comprises a driving mechanism 3, a pressing plate 4 and at least three pressing assemblies, the pressing plate 4 is fixed with the driving mechanism 3, one end of each pressing assembly is connected with one end of the pressing plate 4 facing the upper positioning sleeve 1, and the other end of each pressing assembly is a free end matched with the upper positioning sleeve 1. The driving mechanism 3 consists of an air cylinder and a mounting plate, the power output end of the air cylinder is fixedly connected with the mounting plate, the air cylinder can be replaced by a hydraulic cylinder, the pressing plate 4 is connected with the mounting plate, the pressing plate 4 is provided with a mounting hole, and a screw penetrates through the mounting hole in the pressing plate 4 to be connected with the mounting plate, so that the pressing plate 4 and the mounting plate in the driving mechanism 3 are fixed into a whole. In the embodiment, three jacking components are adopted, and the central connecting lines of the three jacking components form a triangle, so that the pressure plate 4 is uniformly stressed and is stable. When the driving mechanism 3 performs feeding work, the driving mechanism 3 pushes the pressing plate 4 to feed, so that the jacking component moves towards the positioning sleeve 1, and finally the jacking component and the positioning sleeve 1 form abutting, so that the positioning sleeve 1 is pressed on the end face of the workpiece A.
The jacking assembly comprises a jacking cap 6, one or more adjusting pads 7 and a locking screw 8, wherein the jacking cap 6 is provided with an assembly hole, a limiting part 6a with a through hole is arranged in the assembly hole, and the limiting part 6a divides the assembly hole into a first assembly hole 6b and a second assembly hole 6 c; the adjusting pad 7 is used for adjusting the distance between the top cap 6 and the pressing plate 4, one end of the adjusting pad 7 abuts against the limiting portion 6a, the other end of the adjusting pad 7 abuts against the pressing plate 4, one end of the locking screw 8 penetrates through a through hole in the limiting portion 6a and then is connected with the pressing plate 4, the locking screw 8 is limited by the limiting portion 6a, and one part of the locking screw 8 is located in the second assembling hole 6 c. In this embodiment, be equipped with the blind hole on the clamp plate 4, the one end of hood 6 is located the blind hole, after adjusting pad 7 has been installed in first pilot hole 6b for form the interval between hood 6 and clamp plate 4, adjusting pad 7 preferentially adopts the dish spring, and quantity is 2 to 3, has the effect of deformation volume through adjusting pad 7, can solve the uneven phenomenon of 3 hood 6's that the perpendicular error of the hole of course of working work piece A and axial plane terminal surface leads to indirectly.
For the matching of the guide device, the workpiece A and the cutter bar guide column 11, the inner hole of the workpiece A is respectively matched with the outer circles of the upper positioning sleeve 1 and the lower positioning sleeve 2 in the guide device in a small clearance fit (or taper self-centering) for positioning, the first central hole 1d and the second central hole 2d are positioned with the outer periphery of the cutter bar assembly in a small clearance fit, positioning based on the dimensional accuracy and form and position tolerance of the inner holes is formed, and the requirements of the straightness and the symmetry degree of the key groove are met.
By adopting the guiding device with the structure, the cutter bar guiding column 11 can be prevented from being positioned by adopting a bolt, the guiding and positioning of the cutter bar guiding column 11 are facilitated, and the workpiece A is clamped between the upper positioning sleeve 1 and the lower positioning sleeve 2 due to the fact that the pressing component directly presses the upper positioning sleeve 1, so that the workpiece A is positioned conveniently.
S2, matching the cutter bar 12 provided with the cutting tool 10 with the cutter bar guide post 11, and matching the cutter bar guide post 11 with a guide device; preferably, a sliding fit groove 11a is formed on the cutter bar guide post 11, and the cutter bar 12 is in sliding fit with the sliding fit groove 11a, so that the cutter bar guide post 11 is fixed, the cutter bar 12 can move, and the cutter bar guide post 11 is matched with the upper positioning sleeve 1 and the lower positioning sleeve 2, so that the moving precision of the cutter bar 12 can be ensured in the cutting process. The cutting tool 10 is fixedly connected with the tool bar 12, and in the cutting process, the tool bar 12 firstly feeds along the first abdicating notch 1a and the second abdicating notch 2a in the radial direction, and then feeds along the axial direction of the workpiece A, so that the workpiece can be cut. The cutting tool 10 is a forming tool and is formed in one step in the width direction of the key groove so as to meet the requirement of product size precision.
S3, the cutter bar 12 is controlled by the numerical control machine tool to feed in the radial direction of the workpiece at each time, and the value of D is 0.02-0.05 mm;
s4, the cutter bar 12 feeds the cutter along the axial direction of the workpiece according to the following formula under the control of the numerical control machine tool, the cutter bar retracts to the initial position of the axial feeding once per axial feeding, the steps S3 and S4 are repeated in this way to cut the workpiece, and a blind key groove consisting of the key groove body 5 and the tool withdrawal groove 9 is machined on the workpiece.
L0＝L+L1-(n-1)×d
In the above formula, H1 is the machining depth of the key groove body, N is the total number of cutting times, L0 is the axial feed size of each time along the workpiece, L is the machining length of the key groove body along the axial direction of the workpiece, L1 is the machining length of the relief groove 9 along the axial direction of the workpiece, N is the natural number corresponding to the cutting between the 1 st time and the nth time, and d is the difference between any two adjacent axial feeds.
The groove bottom surface 9a of the relief groove 9 processed in steps S3 and S4 is a slope or an arc surface, wherein an included angle α formed by the slope and the axial direction of the workpiece is 20 to 30 °. The cutting is carried out by a numerical control broaching machine, and the cutting has a small-feeding radial feeding size, namely the size D of each radial feeding is 0.02-0.05mm, so that the requirement of forming an approximate inclined plane or an arc-shaped plane tool withdrawal groove 9 by numerical control approximate broaching is met, and the roughness of a product is ensured.
The above description is only an exemplary embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any person skilled in the art should understand that they can make equivalent changes and modifications without departing from the concept and principle of the present invention.
Claims (8)
1. The method for processing the blind key groove on the workpiece is characterized by comprising the following steps of:
s1, mounting the workpiece on a guide device;
s2, matching the cutter bar provided with the cutting tool with a cutter bar guide post matched with a guide device;
s3, the cutter bar is fed by D along the radial direction of the workpiece each time under the control of the numerical control machine;
s4, feeding the cutter along the axial direction of the workpiece by the cutter bar under the control of a numerical control machine tool according to the following formula, returning the cutter bar to the initial position of the axial feeding once per axial feeding, repeating the steps S3 and S4 to cut the workpiece, and processing a blind key groove consisting of a key groove body and a tool withdrawal groove on the workpiece;
L0＝L+L1-(n-1)×d
in the above formula, H1 is the machining depth of the key groove body, N is the total number of cutting times, L0 is the axial feed size of each time along the workpiece, L is the machining length of the key groove body along the axial direction of the workpiece, L1 is the machining length of the tool withdrawal groove along the axial direction of the workpiece, N is the natural number corresponding to the cutting between the 1 st time and the nth time, and d is the difference between any two adjacent axial feeds.
2. The method of claim 1, wherein the undercut groove formed in steps S3 and S4 has a slope or arc-shaped bottom surface.
3. The method of claim 2 wherein the bevel forms an angle α of 20-30 ° with the axial direction of the workpiece.
4. A method of blind keyway machining on a workpiece according to claim 1, characterized in that the guide means comprises:
the upper positioning sleeve (1) is in clearance fit with one end of an inner hole of a workpiece, and a first abdicating notch (1a) for the cutter bar to move along the radial direction of the upper positioning sleeve (1) is arranged on the upper positioning sleeve (1);
the lower positioning sleeve (2) is in clearance fit with the other end of the inner hole of the workpiece, and a second abdicating notch (2a) for the cutter bar to move along the radial direction of the lower positioning sleeve (2) is arranged on the lower positioning sleeve (2);
and the pressing component is matched with the upper positioning sleeve (1) to position the workpiece between the upper positioning sleeve (1) and the lower positioning sleeve (2).
5. Method for blind keyway machining on a workpiece, according to claim 4, characterized in that the upper locating sleeve (1) comprises:
the first end face combining component (1b) is abutted against the axial end face of the workpiece, and the first abdicating notch (1a) is arranged on the first end face combining component (1 b);
and a first inner hole coupling part (1c), wherein the first inner hole coupling part (1c) is connected with one end of the first end face coupling component (1 b).
6. Method for blind keyway machining on a workpiece, according to claim 4, characterized in that the lower locating bush (2) comprises:
the second end face combination part (2b) is abutted against the axial end face of the workpiece, and the second abdicating notch (2a) is arranged on the second end face combination part (2 b);
and the second inner hole combining part (2c), and the second inner hole combining part (2c) is connected with one end of the second end face combining component (2 b).
7. The method of blind keyway machining on a workpiece according to claim 4, wherein the hold-down assembly comprises:
a drive mechanism (3);
the pressing plate (4), the pressing plate (4) is fixed with the driving mechanism (3);
at least three tight subassembly in top, the one end of every tight subassembly in top is connected with clamp plate (4) upwards facing the one end of position sleeve (1), the other end of the tight subassembly in top be with last position sleeve (1) complex free end.
8. The method of blind keyway machining on a workpiece according to claim 4, wherein the jacking assembly comprises:
the top cap (6), the top cap (6) is provided with an assembly hole, a limiting part (6a) with a through hole is arranged in the assembly hole, and the limiting part (6a) divides the assembly hole into a first assembly hole (6b) and a second assembly hole (6 c);
one end of the adjusting pad (7) is abutted against the limiting part (6a), and the other end of the adjusting pad (7) is abutted against the pressing plate (4);
and one end of the locking screw (8) penetrates through the through hole in the limiting part (6a) and then is connected with the pressure plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110232667.4A CN113145910B (en) | 2021-03-03 | 2021-03-03 | Method for processing blind key groove on workpiece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110232667.4A CN113145910B (en) | 2021-03-03 | 2021-03-03 | Method for processing blind key groove on workpiece |
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| CN113145910A true CN113145910A (en) | 2021-07-23 |
| CN113145910B CN113145910B (en) | 2023-12-22 |
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| KR20150108185A (en) * | 2014-03-17 | 2015-09-25 | 김선삼 | Injection Mold of Rib Fomation Apparatus |
| CN105479179A (en) * | 2016-01-27 | 2016-04-13 | 湖北铭程精密机械有限责任公司 | Precision blind hole key groove cutting machine |
| CN206614038U (en) * | 2017-04-06 | 2017-11-07 | 南京农业大学 | The easy device of keyway is processed on a kind of lathe |
| CN206925532U (en) * | 2017-07-19 | 2018-01-26 | 黄石联瑞机械科技股份有限公司 | A kind of elastic presser feet |
| CN108044547A (en) * | 2018-01-31 | 2018-05-18 | 河南省西峡汽车水泵股份有限公司 | A kind of water pump casing for vehicle cramp for verifying and checking |
| CN108145187A (en) * | 2017-11-28 | 2018-06-12 | 中国航发西安动力控制科技有限公司 | For processing the axial cutter and processing technology for being evenly distributed with Internal Spherical Surface slot |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000024830A (en) * | 1998-07-15 | 2000-01-25 | Toshiba Corp | Key groove machining device |
| US6942438B1 (en) * | 2001-04-26 | 2005-09-13 | Scott L. Deguise | Keyway cutter tool and method |
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