CN214351059U - High-precision clamp mechanism for numerical control machine tool - Google Patents
High-precision clamp mechanism for numerical control machine tool Download PDFInfo
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- CN214351059U CN214351059U CN202120178811.6U CN202120178811U CN214351059U CN 214351059 U CN214351059 U CN 214351059U CN 202120178811 U CN202120178811 U CN 202120178811U CN 214351059 U CN214351059 U CN 214351059U
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- clamping block
- end cover
- locating pin
- clamping
- work piece
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- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The utility model discloses a high-accuracy anchor clamps mechanism for digit control machine tool, including end cover, locating pin, conical head, connecting portion, taper hole, bar breach, bulb, its axial towards the end cover direction removal along the locating pin of drive unit drive is made bulb and taper hole inner wall relative slip to the bulb, and then makes the locating pin produce elasticity and expand deformation, makes the conical head chucking on the interior taper hole of work piece. Slide in the taper hole through drive unit drive bulb, make the locating pin expand, and then the hole of chucking work piece, make the clamping that can stabilize of work piece, when unloading, drive unit drive bulb resets, make locating pin deformation reset, and then make the work piece can take out from the locating pin, the unloading of the work piece of being convenient for, through setting up first fixture block, second fixture block and fourth fixture block, slide in the locking groove of second fixture block by the fourth fixture block, make driving element's mounted position precision can reduce, and then reduced the manufacturing and processing degree of difficulty.
Description
Technical Field
The utility model relates to an anchor clamps technical field specifically is a high-accuracy anchor clamps mechanism for digit control machine tool.
Background
When the outer surface of some workpieces with taper holes is processed, clamping coaxiality is often guaranteed in order to guarantee processing quality. If the traditional three-jaw or four-jaw chuck is adopted for clamping, the clamping is inconvenient, and the measurement of the coaxiality after the clamping is very time-consuming and labor-consuming. Therefore, when the workpiece is machined, the inner hole can be positioned and clamped, and the coaxiality can be well ensured. The clamping effect can be guaranteed by positioning and clamping the inner hole, but the clamping and the unloading are inconvenient.
In view of this, chinese patent publication No. CN105983869A discloses a machining fixture for a workpiece with a taper hole on a numerical control machine tool, which has a fixture body, a clamping shaft and a piece unloading device; one end of the clamp body is provided with a connecting part connected with a main shaft of the numerical control machine tool, and the other end of the clamp body is provided with a connecting hole coaxial with the main shaft; one end of the clamping shaft is fixedly arranged in the connecting hole, and the other end of the clamping shaft is provided with a self-locking conical surface matched with the conical hole of the workpiece; the part unloading device comprises a cylinder, a part unloading plate, a push rod, a stress block and a return spring; a sliding groove is arranged in the clamp body, the stress block is arranged in the sliding groove in a sliding manner, a sliding hole for the push rod to pass through and communicated with the sliding groove is arranged on the end face of the clamp body on which the clamping shaft is arranged, the unloading plate is sleeved on the clamping shaft in a sliding manner, and the unloading plate is connected with the stress block through the push rod; a push shaft of the cylinder acts on the stress block; the push rod is sleeved with a return spring, and the return spring is positioned between the stress block and the bottom of the sliding chute.
The present application also aims to provide a clamp structure for facilitating the unloading of a workpiece with a tapered hole.
In order to solve the above problems, we propose a clamping mechanism for a high-precision numerically controlled machine tool.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide a high accuracy anchor clamps mechanism for digit control machine tool, in order to solve above-mentioned technical problem, the utility model provides a following technical scheme:
the utility model provides a high-precision clamp mechanism for a numerical control machine tool, which comprises an end cover which is detachably arranged on a main shaft of the machine tool and a positioning pin which is coaxially arranged on the end cover, wherein the outer diameter of the positioning pin is slightly smaller than the inner hole at the upper end of a workpiece, one end of the positioning pin, which is far away from the end cover, is provided with a conical head which is matched with the inner conical hole on the workpiece, the end cover is coaxially provided with a connecting part, the positioning pin is coaxially and fixedly connected on the connecting part and is internally and coaxially provided with a conical hole, the inner diameter of the conical hole is sequentially increased towards the direction far away from the end cover, the circumferential surface of the positioning pin is provided with a plurality of strip-shaped notches which extend onto the conical head and run through the conical hole along the axial array of the positioning pin, a ball head is clamped in the conical hole, the ball diameter of the ball head is larger than the minimum inner diameter of the conical hole and smaller than the maximum inner diameter of the conical hole, the ball head is driven by a driving unit to move towards the direction of the end cover along the axial direction of the positioning pin, and the ball head and the inner wall of the taper hole slide relatively, so that the positioning pin generates elastic expansion deformation, and the taper head is tightly clamped on the inner taper hole of the workpiece.
As the above technical solution is further optimized, the driving unit includes a thin pull rod coaxially and fixedly connected to the ball head, the thin pull rod is slidably inserted into the connecting portion and coaxially and fixedly connected to a third clamping block, a sliding groove for clamping the third clamping block and capable of freely sliding along the axial direction of the end cap is formed in the connecting portion, a connecting seat is arranged on the third clamping block, a connecting shaft is coaxially and rotatably connected to the connecting seat, and the connecting shaft is drivingly connected to a driving element mounted on the machine tool.
As a further optimization of the solution described above, the drive element is a hydraulic cylinder.
As a further optimization of the above technical scheme, a first clamping block is coaxially arranged at one end, away from the connecting seat, of the connecting shaft, a clearance groove is formed in the end cover, through which the first clamping block can freely pass when moving, a second clamping block is arranged in the clearance groove, the driving element is in driving connection with the second clamping block, a fourth clamping block with a T-shaped longitudinal section is arranged on the first clamping block, and a locking groove, through which the fourth clamping block can be clamped and can freely slide along the radial direction of the end cover, is formed in the second clamping block.
As a further optimization of the above technical solution, the positioning pin and the conical head are of an integrally formed structure and are made of spring steel.
Compared with the prior art, the utility model discloses the beneficial effect who reaches is: during normal clamping, insert through the locating pin and close with the interior taper hole on the work piece, because the external diameter of locating pin slightly is less than work piece hole internal diameter, the work piece can be loaded fast this moment, rethread drive unit drive bulb slides in the taper hole, make the locating pin can expand, and then the hole of chucking work piece, make the work piece can stabilize the clamping, when unloading, drive unit drive bulb resets, make locating pin deformation reset, and then make the work piece can take out from the locating pin, be convenient for unloading of work piece, through setting up first fixture block, second fixture block and fourth fixture block, slide in the locking inslot of second fixture block by the fourth fixture block, make the mounted position precision of drive element can reduce, and then reduced the manufacturing and processing degree of difficulty.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a clamping mechanism for a high-precision numerically-controlled machine tool according to the present invention;
FIG. 2 is a schematic perspective view of a positioning pin of the present invention;
in the figure: 1-hydraulic cylinder, 2-fourth clamping block, 3-end cover, 4-second clamping block, 5-clearance groove, 6-sliding groove, 7-connecting seat, 8-third clamping block, 9-connecting part, 10-ball head, 11-taper hole, 12-thin pull rod, 13-positioning pin, 14-first clamping block, 15-locking groove, 16-taper head and 17-strip-shaped notch.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Examples
As shown in fig. 1-2, a clamping mechanism for a high-precision numerical control machine tool comprises an end cover 3 detachably mounted on a main shaft of the machine tool and a positioning pin 13 coaxially mounted on the end cover 3, wherein an outer diameter of the positioning pin is slightly smaller than an inner hole at an upper end of a workpiece, for example, the outer diameter of the positioning pin is configured to be slidably inserted into the inner hole of the workpiece, one end of the positioning pin 13, which is far away from the end cover 3, is provided with a conical head 16 matched with the inner conical hole on the workpiece, the end cover 3 is coaxially provided with a connecting portion 9, the positioning pin 13 is coaxially and fixedly connected to the connecting portion 9, and is internally and coaxially provided with a conical hole 11, an inner diameter of the conical hole 11 is sequentially increased in a direction far away from the end cover 3, a plurality of strip notches 17 extending onto the conical head 16 and penetrating through the conical hole 11 are axially arranged on a peripheral surface of the positioning pin 13, a ball head 10 is clamped in the conical hole 11, a ball diameter of the ball head 10 is larger than a smallest inner diameter of the conical hole 11 and smaller than a largest inner diameter of the conical hole 11, the ball head 10 is driven by the driving unit to move towards the end cover 3 along the axial direction of the positioning pin 13, so that the ball head 10 and the inner wall of the taper hole 11 slide relatively, the positioning pin 13 is elastically expanded and deformed, and the taper head 16 is clamped on the inner taper hole of the workpiece.
In this embodiment, the driving unit includes a thin tie rod 12 coaxially fixed to the ball head 10, the thin pull rod 12 penetrates into the connecting part 9 in a sliding fit manner and is coaxially and fixedly connected with a third clamping block 8, a sliding groove 6 which is used for clamping the third clamping block 8 and can freely slide along the axial direction of the end cover 3 is arranged in the connecting part 9, the third clamping block 8 is provided with a connecting seat 7, the connecting seat 7 is coaxially and rotatably connected with a connecting shaft, the connecting shaft is connected with a hydraulic cylinder 1 arranged on a machine tool in a driving way, the hydraulic cylinder 1 drives a thin pull rod 12 to move, so that the ball head 10 slides in the taper hole 11, and in the sliding process, the ball head 10 generates an abutting force on the inner wall of the taper hole 11 of the positioning pin 13, and then the positioning pin 13 is elastically expanded and deformed, so that the outer wall of the positioning pin 13 is abutted against the wall of the inner hole of the workpiece, and the workpiece can be stably clamped on a main shaft of a machine tool.
In this embodiment, a first latch 14 is coaxially disposed at an end of the connecting shaft away from the connecting base 7, a clearance groove 5 for the first clamping block 14 to freely pass through is arranged in the end cover 3, a second clamping block 4 is arranged in the clearance groove 5, the hydraulic cylinder 1 is in driving connection with the second fixture block 4, the first fixture block 14 is provided with a fourth fixture block 2 with a T-shaped longitudinal section, the second fixture block 4 is provided with a locking groove 15 for the fourth fixture block 2 to be clamped and capable of freely sliding along the radial direction of the end cover 3, the hydraulic cylinder 1 is generally installed on a machine tool in a screw mode, but the screw connection mode can affect the coaxiality of the thin pull rod 12 and the ball head 10, so that a first clamping block and a second clamping block are arranged, and slide in locking groove 15 through fourth fixture block 2, reduce 1 mounted position precision of pneumatic cylinder, and then can reduce the utility model discloses a whole manufacturing degree of difficulty.
In this embodiment, the positioning pin 13 and the conical head 16 are integrally formed and made of spring steel, so that the rigidity and the coaxiality of the positioning pin 13 and the conical head 16 can be ensured, and the spring steel has large elastic deformation capacity, so that the positioning pin 13 and the conical head 16 are not easily subjected to plastic deformation when being elastically expanded or contracted.
The utility model discloses a theory of operation: in the initial state, the positioning pin 13 can be inserted into the inner hole of the workpiece in a sliding fit manner, at the moment, the workpiece is sleeved into the positioning pin 13, the conical head 16 is clamped into the inner conical hole of the workpiece, then the hydraulic cylinder 1 is started, the hydraulic cylinder 1 drives the second clamping block 4 to move, the thin pull rod 12 drives the ball head 10 to move in the conical hole 11 towards the direction close to the end cover 3, in the moving process, the ball head 10 is abutted against the inner wall of the conical hole 11, meanwhile, due to the strip-shaped notch 17 arranged on the positioning pin 13, the positioning pin 13 can be elastically expanded, and further, the positioning pin 13 expands the inner hole of the workpiece, so that the workpiece can be stably clamped, after the processing is finished, the hydraulic cylinder 1 is reset, the ball head 10 is enabled to move reversely, further, the elastic expansion deformation of the positioning pin 13 can be recovered, further, the positioning pin 13 is enabled to recover the sliding fit with the inner hole of the workpiece, so that the workpiece can be rapidly disassembled from the positioning pin 13, the workpiece is convenient to unload.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a high-accuracy anchor clamps mechanism for digit control machine tool, includes demountable installation end cover (3) on the lathe main shaft and coaxial arrangement locating pin (13) on end cover (3), the external diameter of locating pin (13) slightly is less than work piece upper end hole, the one end that end cover (3) were kept away from in locating pin (13) is equipped with conical head (16) with interior conical bore looks adaptation on the work piece, a serial communication port, coaxial connecting portion (9) are equipped with on end cover (3), the coaxial rigid coupling of locating pin (13) is on connecting portion (9), and coaxial a conical bore (11) that is equipped with in it, the internal diameter of conical bore (11) increases progressively in proper order towards the direction of keeping away from end cover (3), locating pin (13) are equipped with a plurality of bar gaps (17) that extend to on conical head (16), run through conical bore (11) on global along its axial array, a bulb (10) are equipped with to the card in conical bore (11), the ball diameter of the ball head (10) is larger than the minimum inner diameter of the taper hole (11) and smaller than the maximum inner diameter of the taper hole (11), the ball head (10) is driven by the driving unit to move towards the end cover (3) along the axial direction of the positioning pin (13), so that the ball head (10) and the inner wall of the taper hole (11) slide relatively, the positioning pin (13) is further made to generate elastic expansion deformation, and the taper head (16) is clamped on the inner taper hole of the workpiece.
2. The clamping mechanism of the high precision numerical control machine according to claim 1, wherein the driving unit comprises a thin pull rod (12) coaxially and fixedly connected to the ball head (10), the thin pull rod (12) is slidably inserted into the connecting portion (9) and coaxially and fixedly connected to a third clamping block (8), a sliding groove (6) for clamping the third clamping block (8) and capable of freely sliding along the axial direction of the end cap (3) is formed in the connecting portion (9), a connecting seat (7) is arranged on the third clamping block (8), a connecting shaft is coaxially and rotatably connected to the connecting seat (7), and the connecting shaft is in driving connection with a driving element mounted on the machine tool.
3. A clamping mechanism for high-precision numerically-controlled machine tool according to claim 2, characterized in that said driving element is a hydraulic cylinder (1).
4. The clamping mechanism of the high-precision numerical control machine according to claim 2, wherein a first clamping block (14) is coaxially arranged at one end of the connecting shaft away from the connecting seat (7), a clearance groove (5) through which the first clamping block (14) can freely move is arranged in the end cover (3), a second clamping block (4) is arranged in the clearance groove (5), the driving element is in driving connection with the second clamping block (4), a fourth clamping block (2) with a T-shaped longitudinal section is arranged on the first clamping block (14), and a locking groove (15) which is used for clamping the fourth clamping block (2) and can freely slide along the radial direction of the end cover (3) is arranged on the second clamping block (4).
5. The clamping mechanism for the high-precision numerical control machine tool according to claim 1, wherein the positioning pin (13) and the conical head (16) are of an integral structure and are made of spring steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120178811.6U CN214351059U (en) | 2021-01-22 | 2021-01-22 | High-precision clamp mechanism for numerical control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120178811.6U CN214351059U (en) | 2021-01-22 | 2021-01-22 | High-precision clamp mechanism for numerical control machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214351059U true CN214351059U (en) | 2021-10-08 |
Family
ID=77959457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120178811.6U Expired - Fee Related CN214351059U (en) | 2021-01-22 | 2021-01-22 | High-precision clamp mechanism for numerical control machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214351059U (en) |
-
2021
- 2021-01-22 CN CN202120178811.6U patent/CN214351059U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211008 |
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| CF01 | Termination of patent right due to non-payment of annual fee |