CN211219799U - Clamping device - Google Patents
Clamping device Download PDFInfo
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- CN211219799U CN211219799U CN201921309758.8U CN201921309758U CN211219799U CN 211219799 U CN211219799 U CN 211219799U CN 201921309758 U CN201921309758 U CN 201921309758U CN 211219799 U CN211219799 U CN 211219799U
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Abstract
The utility model discloses a clamping device for improve the work piece axial dimensions symmetry degree that uses radial benchmark hole as the benchmark, this clamping device includes locating lever, locating pin and clamp clamping chuck, and the outer disc of locating pin cooperates with the inner cylinder face C of the radial benchmark hole of work piece, and the outer disc of locating pin laminates with the terminal surface K of locating lever, presss from both sides the internal surface G and the cooperation of part surface D of clamp clamping chuck and presss from both sides tight part. The utility model discloses an use radial benchmark hole as the location benchmark, improve part axial dimension symmetry and axial dimension's precision, improve machining efficiency.
Description
Technical Field
The utility model relates to a machining field especially relates to a can guarantee to use axial dimension symmetry and the clamping device of size of radial benchmark hole as the benchmark.
Background
Generally, in order to ensure the axial dimension symmetry of two ends of a workpiece relative to a radial reference hole, the two ends of the workpiece are used as references, and a center is measured and calculated so as to machine the radial reference hole.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a clamping device to radial benchmark hole is the location benchmark, can the centre gripping location work piece, be used for improving the work piece axial dimension symmetry that uses radial benchmark hole as the benchmark, is suitable for the work piece of different specifications.
The axial dimension symmetry of the workpiece is the consistency of the distances from the axial line of the radial reference hole of the workpiece to the end faces at two ends of the workpiece by taking the axial line of the radial reference hole as a reference.
The utility model provides a clamping device, which is used for improving the symmetry degree of the axial dimension of a workpiece based on a radial reference hole, wherein two ends of the workpiece 4 are in a cylindrical or square structure, the middle part of the workpiece 4 is provided with a convex structure 41, and the convex structure 41 is provided with a radial reference hole 42 vertical to the axial direction of the workpiece;
the clamping device comprises a positioning rod 1, a positioning pin 2 and a clamping chuck 3,
an opening is formed in the end face K of one end of the positioning rod 1 along the axis direction of the positioning rod 1, and one end of the workpiece 4 penetrates through the opening of the positioning rod 1;
the clamping chuck 3 is of an integrated structure, the clamping chuck 3 comprises a first through hole 30 and a second through hole 31, the first through hole 30 is communicated with the second through hole 31, and the other end of the workpiece 4 penetrates through the first through hole 30 and the second through hole 31 of the clamping chuck 3;
the locating pin 2 runs through the radial reference hole 42 of the workpiece, and the outer surface of the locating pin 2 is in contact with the end face K of the locating rod 1 with one end provided with the opening.
Further, an end face H of the other end of the positioning rod 1 is perpendicular to the axial direction of the positioning rod 1, and an end face K of the positioning rod 1 is parallel to the end face H.
Further, the inner diameter of the first through hole 30 is larger than that of the second through hole 31.
Further, the dimension of the inner surface of the second through hole 31 perpendicular to the axial direction of the second through hole 31 is the same as the dimension of the outer surfaces of both ends of the workpiece 4 perpendicular to the axial direction of the workpiece.
Further, the clearance distance between the outer surface of the pilot pin 2 and the inner surface C of the radial reference hole 42 of the workpiece is 1/5 of the axial dimension symmetry of the workpiece.
Further, the clamping chuck 3 is of a split structure and is of an integrated structure.
Further, the clamping chuck 3 can also be of a split structure, and the split structure of the clamping chuck 3 can be formed by symmetrically dividing the clamping chuck into an integrated structure along the axial direction.
The utility model discloses technological effect: by using the radial reference hole as a positioning reference, the function of ensuring the axial size symmetry of the part is realized, and the problems of various processing devices and inaccurate positioning caused by clamping and positioning of the middle appearance part are avoided. The axial dimension symmetry and the axial dimension precision of the machined part are improved, and the machining efficiency of the part is improved.
Drawings
FIG. 1 is a cross-sectional view of one of the clampable workpieces of the present invention;
FIG. 2 is a top view of one of the clampable workpieces of the present invention;
FIG. 3 is a schematic structural view of the clamping device of the present invention;
fig. 4 is a schematic structural view of the clamping chuck of the present invention;
fig. 5 is a schematic structural diagram of the positioning rod of the present invention.
Detailed Description
The present invention will be described with reference to the accompanying drawings.
Example 1
Fig. 1 is a cross-sectional view of one of the clampable workpieces, and fig. 2 is a top view of one of the clampable workpieces of the present invention. With reference to fig. 1 and 2, the two ends of the workpiece 4 are cylindrical structures 40, the middle of the workpiece 4 is a protruding structure 41, and the protruding structure 41 is provided with a radial reference hole 42 perpendicular to the axis of the cylindrical body.
Fig. 3 is a schematic structural view of the clamping device of the present invention. As shown in fig. 3, the clamping device comprises a positioning rod 1, a positioning pin 2 and a clamping chuck 3,
fig. 5 is a schematic structural diagram of the positioning rod of the present invention. As shown in fig. 1, 2, and 5, a hole is formed in the end face K of one end of the positioning rod 1 along the axis direction of the positioning rod 1, the end face H of the other end of the positioning rod 1 is perpendicular to the axis direction of the positioning rod 1, the end face H is of a closed structure, and one end of the workpiece 4 is inserted into the hole of the positioning rod 1.
Fig. 4 is a schematic structural view of the clamping chuck of the present invention. Referring to fig. 1, 2 and 4, the clamping chuck 3 provided in this embodiment is an integrated structure, the clamping chuck 3 includes a first through hole 30 and a second through hole 31, the first through hole 30 and the second through hole 31 penetrate through, and the other end of the workpiece 4 penetrates through the first through hole 30 and the second through hole 31 of the clamping chuck 3.
The positioning pin 2 penetrates through a radial reference hole 42 of the workpiece, and the outer surface of the positioning pin 2 is in contact with the end face of the positioning rod 1 with the hole.
Further, as shown in fig. 5, the positioning rod end face K is parallel to the end face H.
Further, as shown in fig. 4, the first through hole 30 of the clamping chuck 3 has an inner diameter dimension larger than that of the second through hole 31. The size of the inner surface of the second through hole 31 perpendicular to the axial direction of the second through hole is the same as the diameter of the outer circular surface of the two ends of the workpiece 4 perpendicular to the axial direction. Specifically, the size of the inner surface of the second through hole 31 is the same as the size of the outer circular surface B or D at both ends of the workpiece 4, and the second through hole 31 can be fitted to the outer circular surface B or D.
During machining, the second through hole 31 clamps and positions one end of the workpiece 4, so that the workpiece 4 is prevented from moving along the radial direction of the workpiece; the first through hole 30 gives way to the workpiece 4 to avoid interference with the parts.
Further, the clearance distance between the outer surface of the pilot pin 2 and the inner surface of the radial reference hole 42 of the workpiece is 1/5 degrees of axial symmetry. The outer circular surfaces of two ends, which extend out of the positioning pin 2, are contacted and attached tightly with the end surface K of the positioning rod 1, so that the axial positioning effect is realized.
Further, the clamp chuck 3 may be a split structure, and the integrated clamp chuck 3 may be symmetrically cut into two symmetrical parts along the axial direction. When the clamping device is used, the two parts of the clamping chuck 3 are arranged at one end of a workpiece to be clamped, and the workpiece 4 is positioned and clamped.
Specific workpiece processing is described below:
the positioning rod 1 is connected with machine tool equipment through a positioning surface H, and the machine tool equipment can be a lathe or a milling machine. When the positioning rod is connected with a lathe, the positioning rod 1 is arranged at the rear end of the main shaft, and the positioning surface H plays a role in limiting the size length in the axial direction; when the positioning rod 1 is connected with a milling machine, the positioning rod is arranged on a milling machine workbench, such as a parallel jaw vice or a three-jaw vice, and the positioning surface H plays a role in limiting the length dimension in the height direction.
The one end terminal surface of locating lever 1 has seted up the trompil along the axis direction, and the trompil of locating lever 1 can be placed to the one end of work piece 4. The other end of the workpiece 4 penetrates through the first through hole 30 and the second through hole 31 of the clamping chuck 3, and the first through hole 30 of the clamping chuck 3 is not directly contacted with the workpiece 4, so that the workpiece is kept away; the first through hole 31 plays a clamping and positioning role for the workpiece.
The outer circular surface of the positioning pin 2 and the cylindrical surface C of the radial reference hole of the workpiece 4 have certain clearance requirements, the fit clearance is usually set to 1/5 with the requirement of axial dimension symmetry, and if the requirement of axial dimension symmetry is 0.005mm, the clearance between the outer circular surface of the positioning pin 2 and the cylindrical surface C of the radial reference hole of the workpiece 4 is 0.001 mm. After the outer circular surface of the positioning pin 2 is matched with the cylindrical surface C of the radial reference hole of the workpiece 4, the positioning pin 2 penetrates through the radial reference hole of the workpiece 4, and the outer circular surfaces of two extending ends of the positioning pin 2 are contacted and attached to the end surface K of the positioning rod 1, so that the axial positioning effect is achieved.
The end face K of the positioning rod 1 is parallel to the positioning face H, so that after the positioning pin 2 penetrates through the radial reference hole of the workpiece 4 and the outer circular faces of the two ends extending out of the radial reference hole are attached to the end face K of the positioning rod 1, the axial position of the workpiece cannot change at any angular position.
The clamping chuck 3 can be a split type clamping chuck structure or an integrated type clamping chuck structure. In this embodiment, the clamping chuck 3 is a split type clamping chuck structure, and the inner surface G of the clamping chuck 3 is matched with the surface B or the surface D of the workpiece 4 for clamping. If the machine tool equipment is a lathe, the side wall F of the first through hole 30 of the clamping chuck 3 is clamped through a spring chuck, and the second through hole 31 of the clamping chuck 3 plays a role in clamping and positioning the workpiece 4; if the machine tool equipment is a milling machine, the side wall F of the first through hole 30 of the clamping chuck 3 can be clamped through a vice, and the second through hole 31 of the clamping chuck 3 plays a role in clamping and positioning the workpiece 4.
The shape and size of the middle profile portion of the workpiece 4 are not required, and the middle portion may be a revolution type or a symmetrical type, or a special type or an asymmetrical type.
The surface B and the surface D of the workpiece 4 have no definite coaxial requirement with the middle outline part of the workpiece; the surface B and the surface D have no definite shape requirement and can be cylindrical or square, and only the dimension of the inner surface of the second through hole 31 of the clamping chuck 3 perpendicular to the axial direction of the second through hole 31 is ensured to be the same as the dimension of the outer surface of the two ends of the workpiece 4 perpendicular to the axial direction of the workpiece; the surfaces B and D also have no specific dimensional requirements and may be the same or different in size, and when both are the same size, the same size of the clamping collet 3 may be used, and when both are different in size, different sizes of the clamping collet 3 may be used.
The size of the radial reference hole of the workpiece 4 does not need to have the consistency requirement, and when the size of the radial reference hole is inconsistent, the positioning pins 2 with different sizes can be selected and matched with the radial reference hole, so that the matching clearance is ensured to be within the required range. However, for convenience of processing, frequent replacement of positioning pins 2 with different sizes is reduced, and certain consistency requirements can be provided for the size of the radial reference hole.
The machining method comprises the steps that the outer circular surface of the positioning pin 2 is matched with the inner cylindrical surface C of the radial reference hole of the workpiece, the outer circular surface of the positioning pin 2 is attached to the end face K of the positioning rod 1, the clamping chuck 3 is matched with the surface D of the workpiece 4 through the inner surface G to clamp the workpiece, so that the end face of the workpiece E is machined, and after turning, the clamping chuck 3 is matched with the surface B of the workpiece 4 through the inner surface G to clamp the workpiece, so that the end face A of the workpiece is.
The utility model discloses an use radial benchmark hole as the location benchmark, realized the function of guaranteeing work piece axial dimension symmetry, avoided with middle appearance part clamping location and the processingequipment that brings various, the unsafe problem in location, improved convenience, accuracy and the range of application of processing work piece axial dimension symmetry.
Claims (7)
1. A clamping device is used for clamping a workpiece (4), two ends of the workpiece (4) are of cylindrical or square structures, a protruding structure (41) is arranged in the middle of the workpiece (4), and the protruding structure (41) is provided with a radial reference hole (42) perpendicular to the axial direction of the workpiece (4); for improving the symmetry of the axial dimension of a workpiece based on a radial reference hole,
the clamping device comprises a positioning rod (1), a positioning pin (2) and a clamping chuck (3),
an opening is formed in the end face K of one end of the positioning rod (1) along the axis direction of the positioning rod (1), and one end of the workpiece (4) penetrates through the opening of the positioning rod (1);
the clamping chuck (3) comprises a first through hole (30) and a second through hole (31), the first through hole (30) and the second through hole (31) are communicated, and the other end of the workpiece (4) penetrates through the first through hole (30) and the second through hole (31) of the clamping chuck (3);
the positioning pin (2) penetrates through a radial reference hole (42) of the workpiece, and the outer surface of the positioning pin (2) is in contact with the end face K, provided with one end with a hole, of the positioning rod (1).
2. The clamping device according to claim 1, characterized in that the end surface H of the other end of the locating rod (1) is perpendicular to the axial direction of the locating rod (1), and the end surface K of the locating rod (1) is parallel to the end surface H.
3. Clamping device according to claim 1, characterized in that the first through hole (30) has an inner diameter dimension which is larger than the inner diameter dimension of the second through hole (31).
4. A clamping device according to claim 3, characterized in that the dimension of the inner surface of the second through hole (31) perpendicular to the axial direction of the second through hole (31) is the same as the dimension of the outer surface of both ends of the workpiece (4) perpendicular to the axial direction of the workpiece.
5. Clamping device according to claim 1, characterized in that the clearance distance of the outer surface of the positioning pin (2) from the inner surface C of the radial reference hole (42) of the workpiece is 1/5 of the axial dimensional symmetry of the workpiece.
6. A clamping device according to claim 1, characterized in that the clamping jaw (3) is of a split construction.
7. A clamping device according to claim 1, characterized in that the clamping collet (3) is of one-piece construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921309758.8U CN211219799U (en) | 2019-08-13 | 2019-08-13 | Clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921309758.8U CN211219799U (en) | 2019-08-13 | 2019-08-13 | Clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211219799U true CN211219799U (en) | 2020-08-11 |
Family
ID=71935979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921309758.8U Active CN211219799U (en) | 2019-08-13 | 2019-08-13 | Clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211219799U (en) |
-
2019
- 2019-08-13 CN CN201921309758.8U patent/CN211219799U/en active Active
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