CN109623458B - Clamping device suitable for material cutting - Google Patents
Clamping device suitable for material cutting Download PDFInfo
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- CN109623458B CN109623458B CN201811647420.3A CN201811647420A CN109623458B CN 109623458 B CN109623458 B CN 109623458B CN 201811647420 A CN201811647420 A CN 201811647420A CN 109623458 B CN109623458 B CN 109623458B
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- circular
- inner cavity
- clamping block
- circular inner
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- 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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
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Abstract
The invention provides a clamping device suitable for material cutting, which comprises: the device comprises a circular outer disc, a circular swinging disc, a bolt and a clamping block; a circular inner cavity is arranged in the circular outer disc, and a plurality of threaded holes are formed in the side wall of the circular inner cavity along the circumferential direction; the circular swinging plate is arranged in the circular inner cavity, and a plurality of bolts penetrate through a plurality of threaded holes in the side wall of the circular inner cavity to be in contact with the side wall of the circular inner cavity; the circular swinging plate is provided with a groove, the clamping block is connected with the swinging plate through the groove, a plurality of threaded holes are formed in the end face of the swinging plate along the circumferential direction, and a plurality of bolts penetrate through the threaded holes to be in contact with the bottom of the circular inner cavity of the outer plate; the clamping block can clamp a part to be machined. The invention solves the difficult point of adjusting concentricity and coaxiality of parts which are clamped and turned for many times, particularly slender axles, and the key problems of easy vibration and the like during processing.
Description
Technical Field
The invention relates to the technical field of metal cutting machining, in particular to a clamping device suitable for material cutting machining.
Background
In the terahertz imaging system, a light machine scanning mechanism is an important component of the whole machine imaging system, and the most important key in the whole scanning mechanism is a connecting rod shaft for swinging a scanning mirror, and the connecting rod shaft is supported by a bearing to move between the scanning mirror and a fixed lifting lug, so that the assembly of the connecting rod shaft and the processing precision of the connecting rod shaft directly influence each parameter of the whole scanning mechanism in working and the working performance of the whole machine. These factors are finally directly reflected in the quality of the whole machine for scanning and imaging the target. These include, among others: the shift of the scan mirror thus causes noise in operation, image jitter, distortion, etc. of dynamic real-time imaging.
The connecting rod shaft belongs to a stepped slender shaft part and is mainly manufactured by turning or grinding in a traditional manufacturing method. The steps usually taken for turning are: the rough machining is carried out after allowance is removed, aging treatment such as dimensional stability and stress removal and the like is carried out to refine crystal grains, final finish machining is carried out, the coaxiality of a workpiece and a lathe spindle is usually adjusted by using a four-jaw chuck during finish machining, the common four-jaw chuck can only translate the workpiece by pressing and loosening four clamping jaws if the coaxiality and the concentricity are adjusted, swinging at any position cannot be realized, at the moment, the four-jaw chuck can only be obtained by combining a mode of knocking the part, and the workpiece can be subjected to larger plastic deformation in the assembling and adjusting process due to the fact that the clamping of the four jaws is point stress. Knocking on the part at the same time causes the surface roughness of the part to decrease. Resulting in final machining errors that do not meet the use requirements.
Another method is grinding: usually one end is clamped on a three-grab chuck, and the other end is used with a caudal vertebra thimble (one clamp is used for one thimble). Or two ends of the workpiece are provided with thimble holes (two thimbles), and the two machining modes can cause the part to generate resonance and deflection. No matter one thimble or two thimbles are clamped at two ends in the machining process, and in addition, the internal stress of the material per se can recover the bending deformation of the part per se when the part is taken down in a free state after being machined. In practical application, some materials have various phenomena such as very complicated boundary conditions, clamping contact nonlinearity and the like due to the relationship of material characteristics. When the stress of the grinding wheel disc and the workpiece and the stress of the two ejector pins are released after being stressed in a grinding high-speed rotating state, the bending state of the workpiece is not represented by an elastic-plastic response curve like a common static state, even if the stress-strain relationship is released, a strain energy density function is required to be used for describing, and meanwhile, the selection of a strain energy density function constitutive model of the contact point of the grinding wheel disc and the workpiece needs to be comprehensively considered according to the deformation conditions of materials and the model.
From the above, it is seen that it is important to realize a method of forming a thin and long shaft with high machining precision and high reliability.
Disclosure of Invention
In view of the drawbacks of the prior art, it is an object of the present invention to provide a clamping device suitable for material cutting.
According to the invention, the clamping device suitable for material cutting comprises: the device comprises a circular outer disc, a circular swinging disc, a bolt and a clamping block;
a circular inner cavity is arranged in the circular outer disc, and a plurality of threaded holes are formed in the side wall of the circular inner cavity along the circumferential direction;
the circular swinging plate is arranged in the circular inner cavity, and a plurality of bolts penetrate through a plurality of threaded holes in the side wall of the circular inner cavity to be in contact with the side wall of the circular inner cavity;
the circular swinging plate is provided with a groove, the clamping block is connected with the swinging plate through the groove, a plurality of threaded holes are formed in the end face of the swinging plate along the circumferential direction, and a plurality of bolts penetrate through the threaded holes to be in contact with the bottom of the circular inner cavity of the outer plate;
the clamping block can clamp a part to be machined.
Preferably, a centering bolt is further included;
the bottom of the groove of the circular balance is also provided with a threaded hole;
the centering bolt penetrates through a threaded hole in the bottom of the groove to be connected with the clamping block, and the clamping block and the circular balance are fixed.
Preferably, the circular wobble plate realizes the radial movement of the circular wobble plate by rotating one or more bolts in contact with the side wall of the circular inner cavity.
Preferably, the circular wobble plate realizes axial movement or wobble rotation of the circular wobble plate by rotating one or more bolts in contact with the bottom of the circular inner cavity of the outer plate.
Compared with the prior art, the invention has the following beneficial effects:
1. after the right clamp is adopted to clamp the workpiece, the bolts corresponding to the right clamp are screwed, so that the clamped workpiece can be horizontally moved and can universally swing. The coaxial and concentric adjustment of the parts in any direction can be realized, and the parts are not directly touched.
2. The invention overcomes the problems of stress deformation, difficult control of tolerance caused by resonance, poor surface roughness and the like in the traditional processing process.
3. The invention solves the difficult point of adjusting concentricity and coaxiality of parts which are clamped and turned for many times, particularly slender axles, and the key problems of easy vibration and the like during processing.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural view of a circular outer disc provided by the present invention.
Fig. 2 is a schematic structural view of a circular wobble plate provided by the present invention.
FIG. 3 is a schematic view of a clamping block structure provided in the present invention
Fig. 4 is a schematic view of the working state of the apparatus according to preferred embodiment 2 of the present invention.
FIG. 5 is a schematic view of the working state of the apparatus according to preferred embodiment 2 of the present invention
Fig. 6 is a schematic structural diagram of a clamping device suitable for material cutting according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 6, the clamping device suitable for material cutting according to the present invention comprises: the device comprises a circular outer disc, a circular swinging disc, a bolt and a clamping block;
a circular inner cavity is arranged in the circular outer disc, and a plurality of threaded holes are formed in the side wall of the circular inner cavity along the circumferential direction;
the circular swinging plate is arranged in the circular inner cavity, and a plurality of bolts penetrate through a plurality of threaded holes in the side wall of the circular inner cavity to be in contact with the side wall of the circular inner cavity;
the circular swinging plate is provided with a groove, the clamping block is connected with the swinging plate through the groove, a plurality of threaded holes are formed in the end face of the swinging plate along the circumferential direction, and a plurality of bolts penetrate through the threaded holes to be in contact with the bottom of the circular inner cavity of the outer plate;
the clamping block can clamp a part to be machined.
Specifically, the centering bolt is further included;
the bottom of the groove of the circular balance is also provided with a threaded hole;
the centering bolt penetrates through a threaded hole in the bottom of the groove to be connected with the clamping block, and the clamping block and the circular balance are fixed.
Specifically, the circular wobble plate realizes radial movement of the circular wobble plate by rotating one or more bolts in contact with the side wall of the circular inner cavity.
Specifically, the circular wobble plate realizes axial movement or wobble rotation of the circular wobble plate by rotating one or more bolts in contact with the bottom of the circular inner cavity of the outer plate.
The present invention will be described more specifically below based on preferred examples.
Preferred example 1:
a processing method for cutting materials. The method is characterized in that: the method is characterized in that a clamping device consisting of an outer disc, a swinging disc, a bolt, a clamping block and the like clamps a part to be machined, and the clamping device is matched for assembly and adjustment when a revolving body part is machined. The axis of the bolt is adjusted to be coincident with the axis of the main shaft of the machine tool by screwing the bolt corresponding to the clamping device without directly touching the machined workpiece.
The outer plate is provided with an inner cavity larger than the swinging plate, and the side wall of the inner cavity is provided with a threaded hole for adjusting the coaxiality.
The wobble plate is provided with a groove fixed with the clamping block, and the end surface is provided with a threaded hole used for adjusting the angle.
The clamping block can be used for clamping a part to be machined and is used for connecting the part to be machined and the swinging plate.
As shown in fig. 1, is an outer disc: the material is as follows: 1GE18NI9 TI. The outer circumferential surface of the sleeve is provided with four M6 threaded through holes which are evenly distributed. Through screwing the bolt, screwing and loosening can realize the translation of the wobble plate in the outer plate.
As shown in fig. 2, the balance: the material was TC 4. The structure is that a horn mouth with a deep wedge is arranged at the center, the taper ratio of the horn mouth is 7:15, two symmetrical surface grooves are arranged on the end surface, and the depth and the groove width ratio are 1: 1. The purpose is to eliminate resonance during cutting. And 4 uniformly distributed M6 threaded through holes are formed in the outer ring of the wobble plate surface groove. By screwing the bolts, the bolts in corresponding relation are screwed and loosened, so that the whole swinging plate can rotate in any direction.
As shown in fig. 3, for the clamping block: the material was LY 12. The cone length is smaller than the cone of the wobble plate. The taper ratio is 7: 15. The end surface is provided with two crisscross deep grooves, so that the elastic rubber has certain elasticity. The centering bolt is screwed in a wedge opening of the swing disc, the clamping block can move towards the deep part of the conical shape of the swing disc at the moment, and the clamping block can move towards the center when the tightening end face moves towards the center, and a certain self-centering effect is achieved in the clamping and locking process.
Preferred example 2:
a device assembly method:
1. and placing the clamping block into the swinging plate, and screwing the centering bolt, wherein the bolt is not screwed at the moment.
2. And putting the workpiece to be processed into the clamping block, and screwing down the centering bolt. The workpiece is now firmly clamped.
3. The swinging plate and the clamping block assembly are integrally installed in the outer plate, and 4 bolts on the circumferential surface of the outer plate are locked.
4. Together with the entire assembly, is clamped on a three-jaw chuck of a lathe.
The assembly of the device is thus completed,
the round runout of the processed workpiece can be adjusted by only rotating the corresponding bolt. The parts can be machined.
In a certain terahertz imaging system, the slender shaft of the structure is used for the swinging link of the scanning mirror. The outer diameter of the steel pipe has the design requirement that
Length: 280 mm.
The specific implementation steps are as follows:
(1) after the shaft is roughly machined, a margin of 0.125mm is reserved on one side, namely
(2) And (5) carrying out dimensional stability treatment. The method comprises the following steps: the shaft is put into liquid nitrogen to be soaked for 1 hour, then the shaft is put into a vacuum oven to be heated to 300 ℃, and the vacuum oven is vacuumized to 1.0 multiplied by 10 < -5 > torr.l/s to be kept for 2 hours, and the shaft is cooled to the normal temperature along with the oven after being circulated for three times at high and low temperatures. Grain refinement and stress relief.
(3) The shaft is placed into the clamping block, then the shaft and the clamping block are placed into the swinging disc together, the centering bolt is screwed, and the opening of the clamping block is tightened simultaneously in the process of rotating the centering bolt because the taper depth of the swinging disc is greater than the outer taper of the clamping block. And clamping the workpiece.
(4) The above-mentioned assembly is placed into the outer disk, and the bolts on the periphery of the outer disk are tightly screwed so as to make the above-mentioned device and the workpiece be formed into an integral assembly.
(5) And clamping the whole assembly on a three-jaw chuck, and screwing and locking the jaws.
(6) Aligning the pointer of the dial indicator to the root of the shaft clamp, rotating the bolt on the outer disc at the position 1 as shown in the figure 5, so that the center of the surface runout degree of the circumferential surface which is specifically adjusted at the position 1 is concentric with the lathe spindle.
(7) The lever dial gauge is moved to the far right end of the shaft, as shown in fig. 5, position 2, and concentricity is adjusted by turning the bolt on the wobble plate.
(8) And (6) repeating the steps 6 and 7, and finally enabling the axis of the whole machined shaft to be coincident with the axis of the lathe spindle.
(9) The lathe tail cone which is already aligned by the standard core rod is pushed up. The right end of the workpiece is clamped. As shown in fig. 4.
(10) And (5) installing a turning tool to align circles and cutting outwards from the three-jaw chuck.
(11) Turning: the spindle speed was 100 rpm and the tool displacement was 0.02 MM/sec. The first cutting depth is 0.20MM, the second cutting depth is 0.05MM, and the back cutting depth refers to the cutting depth stated above, and the cutting depth is processed to the designed size.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (4)
1. A clamping device adapted for use in material cutting operations, comprising: the device comprises a circular outer disc, a circular swinging disc, a bolt and a clamping block;
a circular inner cavity is arranged in the circular outer disc, and a plurality of threaded holes are formed in the side wall of the circular inner cavity along the circumferential direction;
the circular swinging plate is arranged in the circular inner cavity, and a plurality of bolts penetrate through a plurality of threaded holes in the side wall of the circular inner cavity to be in contact with the side wall of the circular inner cavity;
the circular swinging plate is provided with a groove, the clamping block is connected with the swinging plate through the groove, a plurality of threaded holes are formed in the end face of the swinging plate along the circumferential direction, and a plurality of bolts penetrate through the threaded holes to be in contact with the bottom of the circular inner cavity of the outer plate;
the clamping block can clamp a part to be machined.
2. The clamping device suitable for material cutting machining according to claim 1, further comprising a centering bolt;
the bottom of the groove of the circular balance is also provided with a threaded hole;
the centering bolt penetrates through a threaded hole in the bottom of the groove to be connected with the clamping block, and the clamping block and the circular balance are fixed.
3. The clamping device for material cutting machining according to claim 2, wherein the circular wobble plate is radially moved by rotating one or more bolts in contact with a side wall of the circular cavity.
4. The clamping device suitable for material cutting machining according to claim 3, wherein the circular wobble plate is axially moved or swung by rotating one or more bolts in contact with the bottom of the circular inner cavity of the outer plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811647420.3A CN109623458B (en) | 2018-12-30 | 2018-12-30 | Clamping device suitable for material cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811647420.3A CN109623458B (en) | 2018-12-30 | 2018-12-30 | Clamping device suitable for material cutting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109623458A CN109623458A (en) | 2019-04-16 |
| CN109623458B true CN109623458B (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811647420.3A Active CN109623458B (en) | 2018-12-30 | 2018-12-30 | Clamping device suitable for material cutting |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003103429A (en) * | 2001-09-28 | 2003-04-08 | Mitsubishi Materials Corp | Cutting tool |
| CN201192783Y (en) * | 2008-05-09 | 2009-02-11 | 如皋市非标轴承有限公司 | Clamp tyre fixture |
| CN202123389U (en) * | 2011-06-18 | 2012-01-25 | 大连洁能重工机械有限公司 | Aligning mould for machining of wind power main shaft |
| CN102974859B (en) * | 2012-12-11 | 2015-01-14 | 广州中船黄埔造船有限公司 | Adjustable middle support device for machining overlength shaft |
| CN204075834U (en) * | 2014-09-22 | 2015-01-07 | 聊城鑫泰机床有限公司 | A kind of boring jig |
| CN205415067U (en) * | 2016-03-22 | 2016-08-03 | 云南丽江建福机床集团有限公司 | Lathe high -speed machining clamping device |
| CN207308992U (en) * | 2017-09-05 | 2018-05-04 | 宁波圣菲机械制造有限公司 | Rise fixture outside a kind of fast disassembly type |
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2018
- 2018-12-30 CN CN201811647420.3A patent/CN109623458B/en active Active
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| CN109623458A (en) | 2019-04-16 |
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