CN216421689U - Back-pull type collet chuck and assembly formed by same - Google Patents
Back-pull type collet chuck and assembly formed by same Download PDFInfo
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- CN216421689U CN216421689U CN202122187951.2U CN202122187951U CN216421689U CN 216421689 U CN216421689 U CN 216421689U CN 202122187951 U CN202122187951 U CN 202122187951U CN 216421689 U CN216421689 U CN 216421689U
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Abstract
The utility model relates to a back-pull collet chuck and a component formed by the same, wherein the back-pull collet chuck is used for clamping a workpiece during machining of a machine tool, and is characterized in that the back-pull collet chuck is of a hollow structure and comprises a connecting end and a clamping end, the clamping end is used for clamping the workpiece, the side wall of the clamping end is provided with at least one gap along the axial direction of the back-pull collet chuck, the gap penetrates through the side wall of the back-pull collet chuck and extends into the hollow structure of the back-pull collet chuck, the gap is also continuous to the end surface of the clamping end, and the back-pull collet chuck further comprises a dustproof part which is arranged in the gap. The rear pull type collet chuck is usually used in cooperation with the collet chuck base, and chips and dust generated during machining can be prevented from falling between the outer wall of the rear pull type collet chuck and the inner wall of the collet chuck base by the dust-proof part arranged in the gap.
Description
Technical Field
The utility model relates to the field of metal cutting machine tools, in particular to a back-pull type collet chuck for clamping a metal workpiece and an assembly formed by the same.
Background
Metal cutting, which is the process of workpiece and tool interaction, is used for material removal in metal forming processes, the tool removes excess metal from the workpiece to be machined and gives the workpiece geometric accuracy, dimensional accuracy and surface quality that meet design and process requirements while controlling productivity and cost. The metal cutting may also be cutting access for the precious metal blank when producing the precious metal catalyst. Regardless of the cutting process being performed, there is relative movement between the workpiece (or blank) and the tool, i.e., the cutting motion, which is provided by the metal cutting machine.
A pull-back collet is a common fixture in the field of metal cutting machines, and is typically used in conjunction with a collet housing. The rear-pull type collet chuck comprises a connecting end and a clamping end, a gap is formed in the side wall of the clamping end along the axial direction of the rear-pull type collet chuck, when a machine tool clamps a workpiece by the rear-pull type collet chuck in the machining process, chips and dust enter between the outer wall of the rear-pull type collet chuck and the inner wall of a collet chuck seat from the gap of the rear-pull type collet chuck, and the conditions of unreliable clamping and unreleasable workpiece are caused. Chips and dust can enter the gap from both the end face and the side face of the clamping end of the pull-back collet. In particular, during machining, the workpiece (or blank) is clamped by the clamping end directly facing the tool, and thus the entry of chips and dust from the end face of the clamping end is more serious.
Disclosure of Invention
Problems to be solved by the utility model
The utility model aims to solve the problems that in the prior art, when a machine tool clamps a workpiece by using a back-pull type collet chuck in the machining process, chips and dust enter between the outer wall of the back-pull type collet chuck and the inner wall of a collet chuck seat through gaps to cause unreliable clamping and workpiece loosening, and the utility model aims to provide the back-pull type collet chuck with the functions of chip prevention and dust prevention and an assembly formed by the same.
Means for solving the problems
The utility model provides a back-pull collet chuck, which is used for clamping a workpiece during machining of a machine tool and is characterized in that,
the rear pull type collet chuck is of a hollow structure and comprises a connecting end and a clamping end, the clamping end is used for clamping a workpiece,
the side wall of the clamping end is provided with at least one gap along the axial direction of the rear pull type collet chuck, the gap penetrates through the side wall of the rear pull type collet chuck and extends into the hollow structure of the rear pull type collet chuck, and the gap is also continuous to the end surface of the clamping end,
the back-pull collet further comprises a dust prevention portion, and the dust prevention portion is arranged in the gap.
The dust-proof part arranged in the gap can ensure that the back-pull type collet chuck has the function of preventing chips and dust from entering between the outer wall of the back-pull type collet chuck and the inner wall of the collet chuck seat through the gap.
Preferably, the dust-proof portion is formed of an elastic sealant, and continuously seals the gap.
The elastic sealant has the characteristics of quick drying, no shrinkage after curing, good elasticity, good adhesion, certain temperature resistance and long service life, does not influence the clamping capability of the pull-back collet chuck when arranged at a gap, and can prevent chips and dust from falling into the gap between the outer wall of the pull-back collet chuck and the inner wall of the collet chuck seat.
Preferably, the dust-proof part comprises a first dust-proof part arranged on one side of the end surface of the gap close to the clamping end,
and the first dust-proof part takes the end surface of the clamping end as a starting point and occupies 10-100% of the length of the clamping end along the axial direction of the back-pull type collet chuck.
During machining, a workpiece (or a blank) is held by the holder end to face the tool, and thus more chips and dust are generated on the end surface side of the holder end, so that the first dust-proof portion is provided thereto.
Preferably, the dustproof part comprises a second dustproof part which is arranged at one side of the gap on the side wall of the back-pull type collet chuck,
and the second dust prevention part takes the outermost side of the side wall of the back-pull type collet chuck as a starting point and accounts for 10% -100% of the thickness of the side wall of the back-pull type collet chuck along the radial direction of the back-pull type collet chuck.
By arranging the second dust-proof part at one side of the side wall of the back-pull type collet chuck, chips and dust can be better prevented from falling into a gap between the outer wall of the back-pull type collet chuck and the inner wall of the collet chuck seat.
Preferably, the width of the gap along the circumferential direction of the rear pull type collet chuck is 1mm-3 mm.
The width of the gap cannot be too narrow or too wide, the deformation capability of the pull-type collet chuck after too narrow is small, the clamping of a workpiece is not facilitated, and a dust prevention part is not easy to arrange if the width is too wide.
Preferably, the gaps are arranged in a plurality of numbers, and the gaps are uniformly distributed around the axial direction of the pull-back collet chuck.
Through setting up many gaps, and set up many gaps and around the axis direction evenly distributed of pull-back formula collet chuck, can make pull-back formula collet chuck have better deformability, centre gripping work piece that can be better.
Preferably, the side wall of the middle part of the back-pull type collet chuck is provided with at least one through hole distributed along the circumferential direction of the back-pull type collet chuck, and one end of the gap close to the connecting end of the back-pull type collet chuck is communicated with the corresponding through hole.
Through setting up the through-hole, can further guarantee that the exposed core has better deformability, not only can reliably use, the size range of centre gripping work piece is also great.
Preferably, a third dust prevention part is arranged at the through hole.
The third dust-proof part at the through hole can prevent the chips and dust from entering between the outer wall of the pull-back collet chuck and the inner wall of the collet chuck seat through the through hole.
Preferably, the material of the back-pull type collet chuck is 45# steel or spring steel.
The 45# steel or the spring steel has excellent comprehensive performance, and the deformability of the pull-back collet can be better ensured by using the steel or the spring steel as the material of the pull-back collet.
Preferably, the utility model also provides an assembly comprising a collet holder and a pull-back collet as defined in any one of the preceding claims,
the cylinder clamp seat is of a hollow structure, the rear pull type cylinder clamp is sleeved in the cylinder clamp seat,
the collet chuck seat comprises a fixed end and a matching end, the fixed end is connected with the connecting end of the pull-back collet chuck, and the matching end is matched with the clamping end of the pull-back collet chuck.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a pull-back collet along its entire length according to an embodiment of the utility model.
FIG. 2 is a schematic end view of the gripping end of a pull-back collet according to an embodiment of the utility model.
Fig. 3 is a diagram illustrating dust prevention portions of a pull-back collet according to an embodiment of the present invention.
Description of the reference numerals
A rear pull collet 1; a connecting end 2; a clamping end 3; a gap 4; a dust-proof part 5; a first dust-proof portion 51; the second dust-proof portion 52; a third dust prevention portion 53; a through hole 6; an internal thread 7.
It should be understood that the dimensions of the various elements shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: unless otherwise indicated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and values, etc., set forth in these embodiments should be construed as merely illustrative, and not a limitation.
The use of the word "comprising" or "comprises" and the like in this disclosure is intended to mean that the elements listed before the word encompass the elements listed after the word and does not exclude the possibility that other elements may also be encompassed. "upper", "lower", "left", "right", "lateral", "longitudinal", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
The embodiment of the utility model discloses a back-pull type collet 1 which is used for clamping a workpiece during machining of a machine tool and matched with a collet seat for working. As shown in fig. 1, the pull-back collet 1 provided by the utility model is of a hollow structure, and comprises a connecting end 2 and a clamping end 3, wherein the connecting end 2 is internally provided with a thread structure (internal thread 7), and the clamping end 3 is used for clamping a workpiece to be processed. The side wall of the clamping end 3 is provided with at least one gap 4 along the axial direction of the back-pull type collet chuck 1, the gap 4 penetrates through the side wall of the back-pull type collet chuck 1 and extends into the hollow structure of the back-pull type collet chuck 1, and the gap 4 is also continuous to the end surface of the clamping end 3. In other words, the slit 4 corresponds to a slit that is split from the end surface of the gripping end 3 of the pull-back collet 1 toward the connection end 2 of the pull-back collet 1, and the slit 4 does not reach the connection end 2 of the pull-back collet 1. The pull-back collet 1 further comprises a dust prevention portion 5, and the dust prevention portion 5 is arranged in the gap 4.
As shown in fig. 1, the pull-back collet 1 involves several key dimensional parameters, the overall length L of the pull-back collet 1, the diameter D of the connecting end 2, the profile M of the internal threads 7 of the connecting end 2, the length H of the internal threads 7 of the connecting end 2, the diameter D1 of the clamping end 3, and the side wall of the clamping end 3 being tapered at an angle of 30 ° (as an example). By means of these critical dimension parameters, the pull-back collet 1 of different specifications can be determined, which is suitable for different processing machines.
The dustproof part 5 is composed of elastic sealant, the elastic sealant has the characteristics of quick drying, no shrinkage after curing, good elasticity, good adhesion, certain temperature resistance and long service life, is arranged at the gap 4, does not influence the clamping capability of the rear pull type collet chuck 1, and can prevent chips and dust from falling into the gap 4 to enter between the outer wall of the rear pull type collet chuck 1 and the inner wall of the collet chuck seat. The elastic sealant in the embodiment of the utility model is preferably silicone gasket-free sealant, and other types of elastic sealants can be used in the utility model.
In embodiment 1, the dust-proof portion 5 includes a first dust-proof portion 51 (see fig. 2 and 3) provided on the side of the slit 4 close to the end surface of the holding end 3, and the first dust-proof portion 51 occupies 10% to 100%, preferably 20% to 80%, more preferably 25% to 70%, and most preferably 30% to 50% of the length of the holding end 3 in the axial direction of the drawn-back collet 1, starting from the end surface of the holding end 3. During machining, a workpiece (or a blank) is clamped by the clamping end and faces the tool, so that more chips and dust are generated on the end face side of the clamping end, and the first dust-proof part 51 arranged on the end face of the clamping end 3 can better prevent the chips and dust from the machining process from falling into the gap 4 and entering between the outer wall of the rear pull type collet 1 and the inner wall of the collet holder.
In embodiment 2, the dust-proof part 5 includes, in addition to the first dust-proof part 51 as in embodiment 1, a second dust-proof part 52 (see fig. 1 and 3) provided on the side wall of the slit 4 located on the side of the side wall of the pull-back collet 1, and the second dust-proof part 52 occupies 10% to 100%, preferably 20% to 80%, more preferably 25% to 70%, and most preferably 30% to 50% of the thickness of the side wall of the pull-back collet 1 in the radial direction of the pull-back collet 1, starting from the outermost side wall of the pull-back collet 1. By further providing the second dust-proof portion 52 provided on the side of the side wall of the pull-back collet 1 of the slit 4, it is possible to prevent chips and dust from the machining process from falling into the space between the outer wall of the pull-back collet 1 and the inner wall of the collet holder from the side face of the pull-back collet 1.
The width of the gap 4 along the circumferential direction of the pull-back type collet chuck 1 is 1mm-3mm, the width of the gap 4 cannot be too narrow or too wide, the deformation capacity of the pull-back type collet chuck is small after too narrow, the clamping of a workpiece is not facilitated, and the dustproof part 5 is not easy to arrange when the width is too wide.
The gaps 4 may also be provided in plural, and the plural gaps 4 may be provided to be uniformly distributed around the axial direction of the pull-back collet 1, so that the pull-back collet 1 has better deformability and can better clamp a workpiece.
As a specific embodiment 3, a plurality of through holes 6 uniformly distributed along the circumferential direction may be provided on the side wall of the middle portion of the pull-back collet 1 of the specific embodiments 1 and 2, and one end of the slit 4 close to the connecting end 2 of the pull-back collet 1 is communicated with the corresponding through hole 6, so that the clamping end 3 can be further ensured to have better deformability, and not only can be reliably used, but also the size range of the clamped workpiece is larger. The through hole 6 is provided with a third dust prevention part 53 for preventing chips and dust from the machining process from falling into the through hole 6 and entering between the outer wall of the pull-back collet 1 and the inner wall of the collet holder.
The 1 st dust-proof portion 51, the 2 nd dust-proof portion 52, and the 3 rd dust-proof portion 53 are formed of the same elastic sealant, the 1 st dust-proof portion 51 is formed by pouring the elastic sealant into the slit 4 from the end surface of the holding end 3 of the rear pull collet 1, the 2 nd dust-proof portion 52 is formed by pouring the slit 4 from the side surface of the rear pull collet 1, and the 3 rd dust-proof portion 53 is formed by pouring the through hole 6 from the side surface of the rear pull collet 1. As is apparent from the sectional view of the dust-proof portion 5 in fig. 3, the 1 st dust-proof portion 51 and the 2 nd dust-proof portion 52 are formed in a substantially L-shape. The 1 st dust-proof portion 51, the 2 nd dust-proof portion 52, and the 3 rd dust-proof portion 53 may be formed continuously or discontinuously, but from the viewpoint of improving the dust-proof effect, it is preferable that the 1 st dust-proof portion 51, the 2 nd dust-proof portion 52, and the 3 rd dust-proof portion 53 are continuous.
The material of the pull-back collet 1 can be preferably 45# steel or spring steel, and the two have good elasticity and wear resistance, and the properties can better ensure the deformability of the pull-back collet 1.
The utility model also provides an assembly, which comprises a collet holder and the rear-pull type collet chuck 1, wherein the collet holder is also of a hollow structure, the rear-pull type collet chuck 1 is sleeved in the collet holder, the collet holder comprises a fixed end and a matching end, the fixed end is connected with the connecting end 2 of the rear-pull type collet chuck 1, and the matching end is matched with the clamping end 3 of the rear-pull type collet chuck 1.
According to the utility model, the dust-proof part 5 is simply arranged at the gap 4 of the pull-back type collet chuck 1, so that cutting scraps and dust generated during workpiece processing can be prevented from falling between the outer wall of the pull-back type collet chuck and the inner wall of the collet chuck seat, and the conditions of unreliable clamping and workpiece loosening are avoided.
It should be understood that the above-mentioned embodiments are only for illustrating the present invention, and the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention, and shall be covered by the protection scope of the present invention.
Claims (10)
1. A back-pull collet chuck is used for clamping a workpiece during machining of a machine tool and is characterized in that,
the rear pull type collet chuck is of a hollow structure and comprises a connecting end and a clamping end, the clamping end is used for clamping a workpiece,
the side wall of the clamping end is provided with at least one gap along the axial direction of the rear pull type collet chuck, the gap penetrates through the side wall of the rear pull type collet chuck and extends into the hollow structure of the rear pull type collet chuck, and the gap is also continuous to the end surface of the clamping end,
the back-pull collet further comprises a dust prevention portion, and the dust prevention portion is arranged in the gap.
2. The pull-back collet of claim 1,
the dustproof part is composed of elastic sealant and continuously seals the gap.
3. The pull-back collet of claim 2,
the dustproof part comprises a first dustproof part which is arranged on one side of the end surface of the gap close to the clamping end,
and the first dust-proof part takes the end surface of the clamping end as a starting point and occupies 10-100% of the length of the clamping end along the axial direction of the back-pull type collet chuck.
4. The pull-back collet of claim 3,
the dustproof part also comprises a second dustproof part which is arranged at one side of the gap on the side wall of the back-pull type collet chuck,
and the second dust prevention part takes the outermost side of the side wall of the back-pull type collet chuck as a starting point and occupies 10-100% of the thickness of the side wall of the back-pull type collet chuck along the radial direction of the back-pull type collet chuck.
5. The pull-back collet of any one of claims 1 to 4,
the width of the gap along the circumferential direction of the rear pull type collet chuck is 1mm-3 mm.
6. The pull-back collet of any one of claims 1 to 4,
the gaps are arranged to be multiple, and the gaps are uniformly distributed around the axis direction of the back-pull type collet chuck.
7. The pull-back collet of any one of claims 1-4,
the side wall of the middle part of the rear pull type collet chuck is provided with at least one through hole distributed along the circumferential direction of the rear pull type collet chuck, and one end of the gap close to the connecting end of the rear pull type collet chuck is communicated with the corresponding through hole.
8. The pull-back collet of claim 7,
and a third dust prevention part is arranged at the through hole.
9. The pull-back collet of any one of claims 1 to 4,
the rear pull type collet chuck is made of 45# steel or spring steel.
10. An assembly comprising a collet seat and a pull-back collet according to any one of claims 1 to 9,
the cylinder clamp seat is of a hollow structure, the rear pull type cylinder clamp is sleeved in the cylinder clamp seat,
the collet chuck seat comprises a fixed end and a matching end, the fixed end is connected with the connecting end of the pull-back collet chuck, and the matching end is matched with the clamping end of the pull-back collet chuck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122187951.2U CN216421689U (en) | 2021-09-10 | 2021-09-10 | Back-pull type collet chuck and assembly formed by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122187951.2U CN216421689U (en) | 2021-09-10 | 2021-09-10 | Back-pull type collet chuck and assembly formed by same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216421689U true CN216421689U (en) | 2022-05-03 |
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ID=81323179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122187951.2U Active CN216421689U (en) | 2021-09-10 | 2021-09-10 | Back-pull type collet chuck and assembly formed by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216421689U (en) |
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2021
- 2021-09-10 CN CN202122187951.2U patent/CN216421689U/en active Active
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