CN215394584U - Chuck applied to slender workpiece - Google Patents
Chuck applied to slender workpiece Download PDFInfo
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- CN215394584U CN215394584U CN202120330581.0U CN202120330581U CN215394584U CN 215394584 U CN215394584 U CN 215394584U CN 202120330581 U CN202120330581 U CN 202120330581U CN 215394584 U CN215394584 U CN 215394584U
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- clamping jaw
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Abstract
The utility model discloses a chuck applied to a slender workpiece, which comprises a chuck, an elastic membrane and a clamping jaw, wherein the chuck is fixedly connected with a grinding machine, the chuck is driven to rotate by a main shaft of the grinding machine, the elastic membrane is fixed on one side of the chuck, an ejector rod is arranged on the other side of the chuck, and the ejector rod can pass through the chuck and be contacted with the elastic membrane; at least four arc-shaped clamping jaws are uniformly distributed and fixed in the direction of the same circumference of the elastic diaphragm, at least two clamping jaw bolts are fixed in the axial direction of each clamping jaw, a limiting rod is arranged on the outer ring of the chuck, and the limiting rod limits the elastic deformation amount of each clamping jaw. The multi-row clamping jaw bolts are utilized, namely the first clamping jaw bolt is set as a first row of clamping jaw bolts, the second clamping jaw bolt is set as a second row of clamping jaw bolts, the first row of clamping jaw bolts and the second row of clamping jaw bolts respectively determine the axis of a workpiece, the position of the workpiece is determined by two axes, and the rotation of the workpiece cannot be influenced by the verticality between the end surface of the workpiece and the outer wall of the workpiece, namely the rotation jump cannot occur.
Description
Technical Field
The utility model relates to the field of grinding, in particular to a chuck applied to a slender workpiece.
Background
The inner hole of a circular workpiece is ground on an electromagnetic chuck. The electromagnetic chuck is used for adsorbing a workpiece on a sucker by utilizing electromagnetic force, and the sucker drives the workpiece to rotate. Because the center of the workpiece is eccentric to the center of the sucker, a radial thrust is generated to push the work to two supporting points, so that the workpiece is reliably positioned in the radial direction, as shown in figures 1 and 2 attached to the specification. The clamp has higher processing precision and is widely adopted. However, for a slender workpiece, due to the influence of the perpendicularity between the end face of the workpiece and the outer wall of the workpiece, the workpiece can swing radially while rotating, the machining precision is influenced, and the requirement on the precision is extremely high when a linear bearing is machined.
In view of the above problems, the present invention proposes a chuck applied to an elongated workpiece to solve the above problems.
Disclosure of Invention
Accordingly, embodiments of the present invention provide a chuck for use with an elongated workpiece that effectively solves the problems of the prior art.
The chuck applied to the slender workpiece comprises a chuck, an elastic membrane and a clamping jaw, wherein the chuck is fixedly connected with a grinding machine, the chuck is driven to rotate by a main shaft of the grinding machine, the elastic membrane is fixed on one side of the chuck, a push rod is arranged in the middle of the other side of the chuck, and the push rod can pass through the chuck to be in contact with the elastic membrane; at least four arc-shaped clamping jaws are uniformly distributed and fixed in the direction of the same circumference of the elastic diaphragm, at least two clamping jaw bolts are fixed in the axial direction of each clamping jaw, a limiting rod is arranged on the outer ring of the chuck, and the limiting rod limits the elastic deformation amount of each clamping jaw.
On the other hand, one side of the ejector rod close to the chuck is provided with a spherical ejector rod bead, and one side of the elastic membrane close to the chuck is provided with a hemispherical elastic groove.
In another aspect, the jaw bolt passes through the jaw and the jaw bolt and jaw bolt are threadedly engaged.
On the other hand, a ground bolt arc surface is arranged on one side of the clamping jaw bolt matched with the workpiece.
On the other hand, the bolt cambered surface is obtained by grinding the clamping jaw bolt by the chuck under the rotation state of the main shaft of the grinding machine.
On the other hand, the concentricity of each bolt cambered surface is less than or equal to 0.008 mm.
On the other hand, four clamping jaws are fixed on the elastic membrane, and a first clamping jaw bolt and a second clamping jaw bolt are fixed on each clamping jaw.
On the other hand, when the first jaw bolt on each jaw is on the same horizontal plane in the circumferential direction, the plane of the first jaw bolt is called a first jaw bolt plane.
On the other hand, when the second jaw bolt on each jaw is located on the same horizontal plane in the circumferential direction, the plane of the second jaw bolt is referred to as a second jaw bolt plane.
On the other hand, every the clamping jaw is equipped with two gag lever posts outward, the gag lever post is located clamping jaw both sides for spacing clamping jaw and not interfering with the clamping jaw bolt.
On the other hand, the limiting rod is located on the outer side of the clamping jaw bolt and is matched with one end, far away from the workpiece, of the clamping jaw screw.
In summary, the present application may have the following beneficial effects: the utility model utilizes a plurality of rows of clamping jaw bolts, namely a first clamping jaw bolt is set as a first row of clamping jaw bolts, a second clamping jaw bolt is set as a second row of clamping jaw bolts, the first row of clamping jaw bolts and the second row of clamping jaw bolts respectively determine the axle center of a workpiece, and the position of the workpiece is determined by two axle centers, so that the rotation of the workpiece cannot be influenced by the perpendicularity between the end surface of the workpiece and the outer wall of the workpiece, namely the rotation jump cannot occur; when the work piece length of processing increases, the clamping jaw also can prolong, after clamping jaw length extension, because the clamping jaw is towards outside expansion, the clamping jaw opening angle of keeping away from chuck side is too big, and the clamping jaw opening angle undersize that is close to chuck side is unfavorable for the work piece to put into, so increase the gag lever post, can make the clamping jaw opening angle of keeping away from chuck one side stable, make the clamping jaw opening angle that is close to chuck side suitable simultaneously, the work piece of being convenient for is put and is got.
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 description of the embodiments are briefly introduced 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 to obtain other drawings based on these drawings without creative efforts. The proportion of the drawing is zoomed in different degrees for convenient viewing, and the proportion of the utility model has no limit effect on the utility model.
Fig. 1 is a side cross-sectional view of a prior art electromagnetic chuck.
Fig. 2 is a view of a prior art electromagnetic chuck in direction a.
Figure 3 is a perspective view of a chuck for use with an elongated workpiece.
Figure 4 is a side cross-sectional view of a chuck for use with an elongated workpiece.
Description of the main element symbols: an electromagnetic chuck 1; a lower fulcrum 11; a horizontal fulcrum 12; a chuck 2; an elastic diaphragm 21; an elastic groove 22; a clamping jaw 23; a first jaw bolt 24; a second jaw bolt 25; a carrier rod 26; a spherical ejector pin bead 261; a bolt arc 27; a workpiece 3; a workpiece end face 31; a workpiece outer wall 32; a grinding wheel 4; and a limiting rod 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The chuck applied to the slender workpiece comprises a chuck 2, an elastic membrane 21 and a clamping jaw 23, wherein the chuck 2 is fixedly connected with a grinding machine, the chuck 2 is driven to rotate by a main shaft of the grinding machine, one side of the chuck 2 is fixedly provided with the elastic membrane 21, the other side of the chuck 2 is provided with a mandril 26, and the mandril 26 can pass through the chuck 2 and contact with the elastic membrane 21; at least four arc-shaped clamping jaws 23 are uniformly distributed and fixed on the elastic membrane 21 in the same circumferential direction, and at least two clamping jaw bolts are fixed on each clamping jaw 23 in the axial direction. The chuck outer lane is equipped with gag lever post 5, the gag lever post restriction the elasticity deformation volume of clamping jaw.
Compared with the prior art, the electromagnetic chuck 1 adsorbs the workpiece 3 on the electromagnetic chuck by utilizing electromagnetic force, the workpiece 3 is driven by the electromagnetic chuck to rotate, and the grinding wheel 4 grinds at the center of the workpiece. Since the center of the workpiece 3 is eccentric to the center of the electromagnetic chuck, a radial thrust is generated to push the work toward the lower fulcrum 11 and the horizontal fulcrum 12, so that the workpiece 3 is reliably positioned in the radial direction, as shown in fig. 1 and 2 attached to the specification. However, for the slender workpiece 3, due to the influence of the perpendicularity between the workpiece end face 31 and the workpiece outer wall 32, the workpiece 3 can swing radially while rotating, and the machining precision is influenced. In the utility model, a plurality of rows of clamping jaw bolts are utilized, namely a first clamping jaw bolt is set as a first row of clamping jaw bolts, a second clamping jaw bolt is set as a second row of clamping jaw bolts, the first row of clamping jaw bolts and the second row of clamping jaw bolts respectively determine the axis of a workpiece, and the position of the workpiece 3 is determined by two axes, so that the rotation of the workpiece cannot be influenced by the perpendicularity between the end surface 31 of the workpiece and the outer wall 32 of the workpiece, namely the rotation jump cannot occur.
In addition, because the workpiece 3 is put in when the ejector rod 26 moves rightwards through the elastic membrane 21, namely the clamping jaw 23 on the elastic membrane 21 expands outwards, the expansion angle of the clamping jaw 23 is larger along with the distance from the elastic membrane 21, the expansion angle of the clamping jaw 23 is smaller at the position closer to the elastic membrane 21, namely the workpiece end face of the workpiece 3 is not contacted with the elastic membrane, namely the workpiece end face 31 at the side close to the elastic membrane is not contacted with other planes, and the possibility that the perpendicularity between the workpiece end face 31 and the workpiece outer wall 32 influences the rotation of the workpiece is eliminated.
Specifically, one side of the ejector rod close to the chuck 2 is provided with a spherical ejector rod bead 261, and one side of the elastic membrane 21 close to the chuck 2 is provided with a hemispherical elastic groove 22. The spherical mandril 261 and the elastic groove 22 can effectively and stably cooperate, so that the deformation quantity of the elastic diaphragm at each time is kept in a stable relation with the stroke of the mandril 26.
Specifically, the jaw bolt passes through the jaw 23 and the jaw bolt are in threaded fit. The position of the clamping jaw bolt is convenient to adjust through threaded fit, when machining accuracy of a workpiece is not high, the workpiece with different diameters can be dealt with by the same chuck, but when the workpiece accuracy needs to reach 0.01mm and above, a single workpiece with one diameter corresponds to one chuck.
Specifically, a ground bolt arc surface 27 is arranged on one side, matched with the workpiece, of the clamping jaw bolt, and the bolt arc surface 27 can keep extremely high matching degree with the outer ring of the round workpiece 3.
Specifically, the bolt arc surface 27 is obtained by grinding the jaw bolt by the chuck 2 in a spindle rotation state of the grinding machine. The clamping jaw is fixed on the elastic membrane 21 through bolts to be ground, so that the concentricity of the cambered surfaces 27 of the bolts is small, and the matching precision is improved.
Specifically, the concentricity of each bolt arc surface 27 is less than or equal to 0.008 mm.
Specifically, four clamping jaws 23 are fixed on the elastic membrane, and a first clamping jaw bolt 24 and a second clamping jaw bolt 25 are fixed on each clamping jaw.
Specifically, the first jaw bolt 24 on each jaw 23 is located on the same horizontal plane in the circumferential direction. When each first jaw bolt 24 is in the same plane, the workpiece 3 is conveniently placed.
Specifically, the second jaw bolt 25 on each jaw 23 is located on the same horizontal plane in the circumferential direction. When each first jaw bolt 24 is in the same plane, the workpiece 3 is conveniently placed.
The jaw bolt arrangement is preferably disposed in a first jaw bolt plane and a second jaw bolt plane. The operation is convenient.
Specifically, every the clamping jaw is equipped with two gag lever posts outward, the gag lever post is located clamping jaw both sides for spacing clamping jaw just does not interfere with the clamping jaw bolt.
Example two: the difference from the first embodiment is only that the placement position of the limiting rod 5 is changed, and the limiting rod 5 is positioned on the outer side of the clamping jaw bolt and matched with the clamping jaw screw rod at one end far away from the workpiece. The deformation volume of clamping jaw is not very big, so elastic diaphragm 21 can not be kept away from to the position of gag lever post 5, if set up the gag lever post like embodiment one then probably lead to, the gag lever post is too close to elastic diaphragm 21 for the gag lever post influences elastic diaphragm's deformation, this embodiment, rotatory gag lever post and clamping jaw screw rod cooperation, make elastic diaphragm can be kept away from to the position of gag lever post.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A chuck applied to a slender workpiece is characterized by comprising a chuck, an elastic membrane and a clamping jaw, wherein the chuck is fixedly connected with a grinding machine, the chuck is driven to rotate by a main shaft of the grinding machine, the elastic membrane is fixed on one side of the chuck, a push rod is arranged in the middle of the other side of the chuck, and the push rod can pass through the chuck to be in contact with the elastic membrane; at least four arc-shaped clamping jaws are uniformly distributed and fixed in the direction of the same circumference of the elastic diaphragm, at least two clamping jaw bolts are fixed in the axial direction of each clamping jaw, a limiting rod is arranged on the outer ring of the chuck, and the limiting rod limits the elastic deformation amount of each clamping jaw.
2. The chuck for elongated workpieces as set forth in claim 1, wherein said pins have spherical pin balls on a side thereof adjacent to said chuck, and said resilient diaphragm has hemispherical resilient recesses on a side thereof adjacent to said chuck.
3. The chuck for use with an elongated workpiece according to claim 1 wherein said jaw bolts extend through the jaws and are threadably engaged therewith.
4. A chuck for use with an elongated workpiece according to claim 1, wherein the side of the jaw bolts engaging the workpiece is provided with a ground bolt curve.
5. The chuck for use with an elongated workpiece according to claim 4, wherein said bolt arcuate surface is obtained by said chuck grinding said jaw bolt while a spindle of a grinding machine is rotating.
6. The chuck for use with an elongated workpiece according to claim 5, wherein the concentricity of each of said bolt arcuate surfaces is less than or equal to 0.008 mm.
7. The chuck for use with an elongated workpiece according to claim 1 wherein four jaws are secured to said elastomeric membrane, a first jaw bolt and a second jaw bolt being secured to each of said jaws.
8. The chuck for use with elongated workpieces according to claim 7 wherein the first jaw bolt on each jaw is circumferentially coplanar and the second jaw bolt on each jaw is circumferentially coplanar.
9. The chuck for elongated workpieces as set forth in claim 1, wherein two stop rods are provided outside each of said jaws, said stop rods being located on both sides of the jaws for stopping the jaws without interfering with the jaw bolts.
10. The chuck for use with an elongated workpiece according to claim 1 wherein the stop bar is located on the outside of the jaw bolt and engages the jaw screw at the end remote from the workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120330581.0U CN215394584U (en) | 2021-02-05 | 2021-02-05 | Chuck applied to slender workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120330581.0U CN215394584U (en) | 2021-02-05 | 2021-02-05 | Chuck applied to slender workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215394584U true CN215394584U (en) | 2022-01-04 |
Family
ID=79666220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120330581.0U Active CN215394584U (en) | 2021-02-05 | 2021-02-05 | Chuck applied to slender workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215394584U (en) |
-
2021
- 2021-02-05 CN CN202120330581.0U patent/CN215394584U/en active Active
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