CN214418260U - Clamping device for part machining - Google Patents
Clamping device for part machining Download PDFInfo
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- CN214418260U CN214418260U CN202120337861.4U CN202120337861U CN214418260U CN 214418260 U CN214418260 U CN 214418260U CN 202120337861 U CN202120337861 U CN 202120337861U CN 214418260 U CN214418260 U CN 214418260U
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Abstract
The utility model discloses a clamping device for processing parts, which comprises a positioning piece and an auxiliary supporting component, wherein the positioning piece comprises a clamping part and a positioning shaft; the positioning shaft is matched with the stepped through hole; the end part of the positioning shaft is provided with a screw rod part, the screw rod part extends out of the stepped through hole, the screw rod part is sleeved with a pressing block, and the pressing block is pressed and fixed on the end surface of the small-diameter section of the shaft body through a nut; the end surface of the screw rod part is provided with a conical positioning groove; the auxiliary supporting component comprises a tightly-pushing part matched with the positioning groove, and the tightly-pushing part is driven by the cylinder to be pushed into or out of the positioning groove; the utility model can ensure the coaxiality of the outer circular surface of the shaft part with the stepped through hole and the stepped through hole, ensure the processing precision of the shaft part and improve the processing quality of the shaft part; the reworking and reworking of the workpiece can be reduced, and the production efficiency is improved; the rejection rate can be reduced, and the waste of raw materials is reduced; the auxiliary support of the shaft parts with the stepped through holes can be realized, the shaft parts with the stepped through holes are prevented from jumping during machining, and machining defects are reduced.
Description
Technical Field
The utility model relates to a clamping device for parts machining belongs to work piece processing technology field.
Background
Please refer to fig. 3. Fig. 3 is a shaft in the prior art, which includes a shaft body 200, the shaft body 200 has a large diameter section and a small diameter section, a stepped through hole 300 coaxial with the outer circumferential surface of the shaft body is provided inside the shaft body 200, the stepped through hole 300 includes a first hole 301, a second hole 302 and a third hole 303, and the shaft with the stepped through hole has a higher requirement on the coaxiality of the stepped through hole and the outer circumferential surface in order to ensure the requirement on assembly precision and the requirement on the fit between the parts.
When the shaft with the stepped through hole is machined, a workpiece is directly clamped by a chuck on a lathe to machine the outer circle of the shaft in the prior art, the coaxiality error between the outer circle surface of the shaft and the stepped through hole is large after the shaft is machined by the machining mode, the machining of the subsequent shaft characteristic is influenced, the machining quality of the whole shaft is influenced, and the assembly precision of the shaft part at the later stage is low and the product quality is poor; some of the products need to be reworked and repaired, so that the time and the labor are wasted, and the production efficiency is low; the error is large, the product can only be treated as a waste product, the rejection rate is high, the waste of raw materials is serious, and the production cost is high.
On the other hand, the shaft with the stepped through hole is generally only fixed at one end during machining, the other end of the shaft is suspended without auxiliary support, when the shaft is machined, the shaft is easy to jump, the influence on machining quality is further reduced, and the rejection rate is high.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a clamping device for parts machining, which can ensure the coaxiality of the outer circular surface of the shaft part with the stepped through holes, ensure the machining precision of the subsequent shaft part with the stepped through holes and improve the machining quality of the shaft part with the stepped through holes; the reworking and reworking of the workpiece can be reduced, and the production efficiency is improved; the rejection rate can be reduced, the raw material waste is reduced, and the production cost is reduced; the auxiliary support of the shaft parts with the stepped through holes can be realized, the shaft parts with the stepped through holes are prevented from jumping during machining, machining defects are reduced, the rejection rate is reduced, and the product quality is improved.
For solving the technical problem, the utility model discloses a following technical scheme: a clamping device for part processing comprises a positioning piece and an auxiliary supporting assembly, wherein the positioning piece comprises a clamping part, a limiting disc and a positioning shaft which are coaxial and sequentially arranged; the positioning shaft is matched with the stepped through hole of the shaft; the end part of the positioning shaft is provided with a screw rod part, the screw rod part extends out of the stepped through hole, a pressing block is sleeved on the screw rod part, and the pressing block is pressed and fixed on the end surface of the small-diameter section of the shaft body through a nut;
a positioning groove is arranged on the axis of the end surface of the screw rod part, and the positioning groove is conical;
the auxiliary supporting assembly comprises a jacking portion, the jacking portion is conical and is matched with the positioning groove in the screw rod portion, and the jacking portion drives the jacking portion to enter or leave the positioning groove through the air cylinder.
Furthermore, the limiting disc is circular, and the side surface of the limiting disc, which is far away from the clamping part, is a limiting plane;
the positioning shaft comprises a first shaft section, a second shaft section, a third shaft section and a screw part which are sequentially arranged, and shaft shoulders are formed between the first shaft section and the second shaft section and between the second shaft section and the third shaft section; the first shaft section is close to one end of the limiting disc.
Furthermore, the positioning piece further comprises an adjusting gasket, the adjusting gasket is sleeved on the first shaft section, and a shaft shoulder between the first shaft section and the second shaft section is abutted to the end face of the first hole through adjustment of the adjusting gasket.
Further, the cylinder comprises a cylinder rod, the tightening part is rotatably connected to the extending end of the cylinder rod, and the cylinder rod is arranged in the cylinder body in a sliding mode.
Further, the first shaft section, the second shaft section and the third shaft section are respectively matched with the first hole, the second hole and the third hole.
Furthermore, a first air port and a second air port are arranged on the cylinder body, the first air port is arranged at the front end of the cylinder body, and the second air port is arranged at the rear end of the cylinder body; the first air port and the second air port are both communicated with an external air path system.
Further, the pressing block is any one of a circle, a square and an ellipse.
Further, a gap of 0.8-1.0mm is arranged between the first shaft section and the first hole; a gap of 0.8-1.0mm is arranged between the third shaft section and the third hole; the second shaft section is in clearance fit with the second hole.
Further, the cylinder body is fixed on an upright post, and the upright post is fixed on a machine tool.
Further, the positioning piece is fixed on the chuck of the machine tool through the clamping part.
The utility model adopts the above technical scheme after, compare with prior art, have following advantage:
the utility model can ensure the coaxiality of the outer circular surface of the shaft part with the stepped through holes and the stepped through holes, ensure the processing precision of the subsequent shaft part with the stepped through holes, and improve the processing quality of the shaft part with the stepped through holes; the reworking and reworking of the workpiece can be reduced, and the production efficiency is improved; the rejection rate can be reduced, the raw material waste is reduced, and the production cost is reduced; the auxiliary support of the shaft parts with the stepped through holes can be realized, the shaft parts with the stepped through holes are prevented from jumping during machining, machining defects are reduced, the rejection rate is reduced, and the product quality is improved.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the auxiliary support assembly;
FIG. 3 is a schematic view of the shaft construction;
in the figure, the position of the upper end of the main shaft,
1-a machine tool chuck, 2-a positioning piece, 21-a clamping part, 22-a limiting disc, 23-an adjusting pad, 24-a positioning shaft, 241-a first shaft section, 242-a second shaft section, 243-a third shaft section, 244-a screw rod part, 245-a positioning groove, 3-a pressing block, 4-a nut, 5-an auxiliary supporting component, 51-an upright post, 52-a jacking part, 53-a cylinder body, 54-a cylinder rod, 55-a first air port, 56-a second air port, 200-a shaft body, 300-a stepped through hole, 301-a first hole, 302-a second hole and 303-a third hole.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and fig. 2 jointly, the utility model provides a clamping device for parts machining, including machine tool chuck 1, setting element 2 and auxiliary stay subassembly 5, machine tool chuck 1 is the clamping part on the machine tool, machine tool chuck 1 is rotatory through motor drive.
The positioning piece 2 comprises a clamping part 21, a limiting disc 22 and a positioning shaft 24, wherein the clamping part 21 is of a cylindrical structure; the one end of clamping part 21 is provided with spacing dish 22, spacing dish 22 is circular, the side that the clamping part was kept away from to spacing dish 22 is spacing plane, spacing plane is used for treating that the processing axle spare carries out the tip spacing.
A positioning shaft 24 is arranged on one side of the limiting disc 22 far away from the clamping part 21, and the positioning shaft 24 and the limiting disc 22 are coaxially arranged; the positioning shaft 24 is used for positioning the stepped through hole 300 of the shaft, and the positioning shaft 24 is matched with the stepped through hole 300 of the shaft so as to ensure the coaxiality of the stepped through hole 300 and the outer circular surface of the shaft body during machining. The positioning shaft 24 comprises a first shaft section 241, a second shaft section 242, a third shaft section 243 and a screw part 244 which are arranged in sequence, and shaft shoulders are formed between the first shaft section 241 and the second shaft section 242 and between the second shaft section 242 and the third shaft section 243; the first shaft section 241 is arranged close to one end of the limiting disc 22; the first shaft segment 241, the second shaft segment 242 and the third shaft segment 243 are respectively arranged in cooperation with the first hole 301, the second hole 302 and the third hole 303 on the shaft.
Wherein a gap of 0.8-1.0mm is arranged between the first shaft segment 241 and the first hole 301; a gap of 0.8-1.0mm is arranged between the third shaft section 243 and the third hole 303; the second shaft section 242 is in clearance fit with the second hole 302, and the fitting precision is 7 grades; the second shaft segment 242 and the first hole 401 have a circular surface roughness of R0.8.
The screw rod part 244 extends out of the stepped through hole 300, a pressing block 3 is sleeved on the screw rod part 244, the pressing block 3 is any one of circular, square and oval, and the maximum circumferential direction of the pressing block 3 is smaller than the diameter of the small-diameter section of the shaft body 200 and larger than the inner diameter of the third hole 303; the pressing block 3 is pressed and fixed on the end face of the small-diameter section of the shaft body 200 through a nut 4.
A positioning groove 245 is arranged on the axis of the end surface of the screw part 244, and the positioning groove 245 is conical.
Further, the positioning element 2 further includes an adjusting shim 23, the adjusting shim 23 is sleeved on the first shaft section 241, and the shaft shoulder between the first shaft section 241 and the second shaft section 242 is abutted to the end surface of the first hole through adjustment of the adjusting shim 23, so that the positioning accuracy is further improved.
The positioning piece 2 can be made into different specifications according to the sizes of the shaft body and the stepped through hole, and when valve bodies of different specifications are required to be machined, the positioning piece 2 of the required specification is clamped and fixed on the machine tool chuck 1 through the clamping part 21.
The auxiliary supporting component 5 comprises a tightening part 52, the tightening part 52 is in a conical shape matched with a positioning groove 245 on a screw rod part 244, the tightening part 52 is arranged on a cylinder rod 52 of the air cylinder, and particularly, the tightening part 52 is rotatably connected to the extending end of a cylinder rod 54 through a bearing; the cylinder rod 54 is arranged in a cylinder 53 in a sliding manner, the cylinder 53 is fixed on a vertical column 51, and the vertical column 51 is fixed on a machine tool; the cylinder 53 is provided with a first air port 55 and a second air port 56, and both the first air port 55 and the second air port 56 are communicated with an external air channel system; the first air port 55 is arranged at the front end of the cylinder 53, and the second air port 56 is arranged at the rear end of the cylinder 53; when the tightening part 52 is required to assist in positioning the workpiece, the second air port 56 is ventilated, the first air port 55 is vented, the cylinder rod 54 extends out, and the tightening part 52 is driven to be pushed into the positioning groove 245 on the screw rod part so as to assist in clamping the workpiece; when the positioning of the tightening part 52 needs to be released, the first air port 55 is ventilated, the second air port 56 is ventilated, and the cylinder rod 54 drives the tightening part 52 to retract, so that the workpiece is released.
The utility model discloses a theory of operation:
when the positioning device is used, the positioning shaft 24 of the positioning piece 2 penetrates through a stepped through hole of the shaft, a shaft shoulder between the first shaft section 241 and the second shaft section 242 is adjusted through the adjusting gasket 23 to be abutted against the end surface of the first hole, the pressing block 3 is pressed and fixed on the end surface of the small-diameter section of the shaft body through the locking nut 4, and then the shaft body is clamped and fixed on the machine tool chuck 1 through the clamping part 21; then the tightly pressing part 52 is pressed into the positioning groove at the end part of the screw part 244 to complete the clamping and positioning of the shaft.
The utility model can ensure the coaxiality of the outer circular surface of the shaft part with the stepped through holes and the stepped through holes, ensure the processing precision of the subsequent shaft part with the stepped through holes, and improve the processing quality of the shaft part with the stepped through holes; the reworking and reworking of the workpiece can be reduced, and the production efficiency is improved; the rejection rate can be reduced, the raw material waste is reduced, and the production cost is reduced; the auxiliary support of the shaft parts with the stepped through holes can be realized, the shaft parts with the stepped through holes are prevented from jumping during machining, machining defects are reduced, the rejection rate is reduced, and the product quality is improved.
The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.
Claims (10)
1. The utility model provides a clamping device for parts machining which characterized in that: the positioning device comprises a positioning piece (2) and an auxiliary supporting component (5), wherein the positioning piece (2) comprises a clamping part (21), a limiting disc (22) and a positioning shaft (24) which are coaxial and arranged in sequence; the positioning shaft (24) is matched with the stepped through hole (300); a screw rod part (244) is arranged at the end part of the positioning shaft (24), the screw rod part (244) extends out of the stepped through hole (300), a pressing block (3) is sleeved on the screw rod part (244), and the pressing block (3) is pressed and fixed on the end surface of the small-diameter section of the shaft body (200) through a nut (4);
a positioning groove (245) is formed in the axis of the end face of the screw rod part (244), and the positioning groove (245) is conical;
the auxiliary supporting component (5) comprises a tightly-pushing part (52), the tightly-pushing part (52) is in a conical shape matched with a positioning groove (245) in a screw rod part (244), and the tightly-pushing part (52) is driven by an air cylinder to be pushed into or leave the positioning groove (245).
2. A holding device for machining a part according to claim 1, wherein: the limiting disc (22) is circular, and the side surface of the limiting disc (22) far away from the clamping part is a limiting plane;
the positioning shaft (24) comprises a first shaft section (241), a second shaft section (242), a third shaft section (243) and a screw part (244), which are sequentially arranged, and shaft shoulders are formed between the first shaft section (241) and the second shaft section (242) and between the second shaft section (242) and the third shaft section (243); the first shaft section (241) is arranged close to one end of the limiting disc (22).
3. A holding device for parts processing according to claim 2, wherein: the positioning piece (2) further comprises an adjusting gasket (23), the adjusting gasket (23) is sleeved on the first shaft section (241), and a shaft shoulder between the first shaft section (241) and the second shaft section (242) is abutted to the end face of the first hole (301) through adjustment of the adjusting gasket (23).
4. A holding device for machining a part according to claim 1, wherein: the air cylinder comprises a cylinder rod (54), the tightening part (52) is rotatably connected to the extending end of the cylinder rod (54), and the cylinder rod (54) is arranged in the cylinder body (53) in a sliding mode.
5. A holding device for parts processing according to claim 2, wherein: the first shaft section (241), the second shaft section (242) and the third shaft section (243) are respectively matched with the first hole (301), the second hole (302) and the third hole (303).
6. A holding device for machining a part according to claim 4, wherein: the cylinder body (53) is provided with a first air port (55) and a second air port (56), the first air port (55) is arranged at the front end of the cylinder body (53), and the second air port (56) is arranged at the rear end of the cylinder body (53); the first air port (55) and the second air port (56) are communicated with an external air channel system.
7. A holding device for machining a part according to claim 1, wherein: the pressing block (3) is any one of round, square and oval.
8. A holding device for parts processing according to claim 5, wherein: a gap of 0.8-1.0mm is arranged between the first shaft section (241) and the first hole (301); a gap of 0.8-1.0mm is arranged between the third shaft section (243) and the third hole (303); the second shaft section (242) is in clearance fit with the second hole (302).
9. A holding device for machining a part according to claim 4, wherein: the cylinder body (53) is fixed on a vertical column (51), and the vertical column (51) is fixed on the machine tool.
10. A holding device for machining a part according to claim 1, wherein: the positioning piece (2) is fixed on the machine tool chuck (1) through a clamping part (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120337861.4U CN214418260U (en) | 2021-02-06 | 2021-02-06 | Clamping device for part machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120337861.4U CN214418260U (en) | 2021-02-06 | 2021-02-06 | Clamping device for part machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214418260U true CN214418260U (en) | 2021-10-19 |
Family
ID=78071026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120337861.4U Active CN214418260U (en) | 2021-02-06 | 2021-02-06 | Clamping device for part machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214418260U (en) |
-
2021
- 2021-02-06 CN CN202120337861.4U patent/CN214418260U/en active Active
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