CN218426915U - Clamp for milling tail groove of compressor crankshaft - Google Patents
Clamp for milling tail groove of compressor crankshaft Download PDFInfo
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- CN218426915U CN218426915U CN202222712461.4U CN202222712461U CN218426915U CN 218426915 U CN218426915 U CN 218426915U CN 202222712461 U CN202222712461 U CN 202222712461U CN 218426915 U CN218426915 U CN 218426915U
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- crankshaft
- milling
- clamp
- eccentric positioning
- tail groove
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- 238000003801 milling Methods 0.000 title claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model relates to a clamp for milling a tail groove of a compressor crankshaft, which comprises a base, wherein one end of the base is provided with a long bearing support part, the other end of the base is provided with a short shaft bearing part, and an eccentric positioning part is arranged between the long shaft bearing part and the short shaft bearing part; a liftable pressing block is arranged above the long shaft bearing part; the eccentric positioning part is provided with a symmetrical inverted V-shaped profile and is also connected with a lifting mechanism for controlling the lifting of the eccentric positioning part. The scheme realizes high-precision automatic alignment and ensures the size quality of the tail milling groove process. The eccentric positioning part with the inverted V-shaped profile is positioned by adopting a unique new scheme, and the problems of inaccurate positioning, tolerance, influence of artificial operation factors and the like in the prior art are solved.
Description
Technical Field
The utility model relates to a bent axle processing equipment technical field specifically relates to a compressor bent axle mills anchor clamps for tail groove.
Background
The crankshaft is an important part in a compressor such as an air compressor, and has a structure as shown in fig. 4 and 5, which has a short axis A1, an eccentric axis A2, and a long axis A3, and after the structure is machined, a tail groove A4 needs to be milled at the end of the long axis A3. According to the technical requirements of different products, the dimension requirement to be ensured in the tail groove milling process is, for example, that the symmetry of the tail groove A4 relative to the excircle of the eccentric shaft A2 by taking the center of the long shaft A3 as a detection reference is required to be less than or equal to 0.15, namely that the crankshaft A is required to be bilaterally symmetrical in view of the angle of FIG. 5 under an ideal condition; or there may be other product parts that require the end groove A4 to be at a particular angle to the axis of symmetry, etc. Therefore, when milling the tail groove, the crankshaft a needs to be adjusted to a reference state such as the eccentric shaft A2 facing upward as shown in fig. 4 and 5 or the eccentric shaft A2 facing downward as shown in fig. 1 by a clamp on a special milling machine, and clamped and fixed, so that the milling cutter can process at a required position conveniently.
The existing clamp structure is similar to a Chinese utility model patent with an authorization publication number of CN201320689Y, the principle of the clamp is that a crankshaft is manually rotated and placed into a row of V-shaped blocks and U-shaped blocks which are arranged in an aligned mode, a long shaft and a short shaft of the crankshaft are erected by the V-shaped blocks respectively, so that the position of the central axis of the crankshaft is located, and an eccentric shaft is located in the middle U-shaped block, so that the symmetry degree is guaranteed; the crankshaft is then pressed and fixed by a pressing plate.
However, in actual use, the positioning of the clamp is not accurate, and the following problems exist:
1. dimensional tolerance problems: for example, the tolerance of the outer circle of the long shaft and the tolerance of the outer circle of the eccentric shaft are 0.05 and 0.08 respectively, when the two V-shaped blocks/U-shaped blocks are used for limiting, the workpiece can be put in due to the fact that the workpiece meets the tolerance, and therefore the crankshaft can be put in the clamp under the condition that the symmetry degree is not ideal due to the superposition of the tolerances. If the tolerance value allowed by the V-shaped block/U-shaped block in the clamp is too small, the situation that the qualified crankshaft cannot be placed in the clamp occurs.
2. Human factor problem: because this kind of anchor clamps need the operating personnel to pack into the bent axle and compress tightly by hand, also can have work piece removal, perk scheduling problem that cause because manual operation.
3. The clamp structure problem is as follows: in the clamp, each V-shaped block/U-shaped block is fixedly arranged, so that the requirement on the machining precision is extremely high, and the adjustment cannot be carried out. This structure is applicable only to a specific crankshaft, and is not applicable to crankshafts having different shaft diameters.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that: the utility model provides a compressor crankshaft mills anchor clamps for tail groove realizes more accurate location alignment to adopt the machine to replace artifical automatic operation, avoid processing the tail groove the symmetry to appear and be unsatisfactory the condition.
According to the technical scheme of the utility model, the utility model provides a compressor crankshaft mills anchor clamps for tail groove, including the base, the base is provided with long bearing support portion at one end, is provided with minor axis bearing support portion at the other end, is provided with eccentric location portion between long axis bearing support portion and minor axis bearing support portion; a liftable compression block is arranged above the long shaft bearing part; the eccentric positioning part is provided with a symmetrical inverted V-shaped profile and is also connected with a lifting mechanism for controlling the lifting of the eccentric positioning part.
Preferably, the eccentric positioning part is a U-shaped block, and the two ends above the U-shaped block are inclined inwards to form an inverted V-shaped profile.
Preferably, the two sides of the bottom of the eccentric positioning part are connected with guide plates, and the two sides of each guide plate are respectively connected with a lifting mechanism.
Preferably, a mounting block extends downward from the bottom of the eccentric positioning portion, and the guide plate has a space for receiving the mounting block.
Preferably, the lifting mechanism comprises a first slide rail and a second slide rail which are respectively arranged at two sides of the eccentric positioning part, the first slide rail and the second slide rail are respectively connected with a first slide block and a second slide block in a sliding manner, and the first slide block and the second slide block are respectively connected with a first air cylinder and a second air cylinder; the first sliding block and the second sliding block are respectively connected with the guide plate.
Preferably, a jack screw for adjusting the position is provided on the guide plate and/or the eccentric positioning portion.
Preferably, the upper surface of the long axis bearing part has a V-shaped groove.
Preferably, the top surface of the short shaft bearing part is a plane, and when the long shaft of the crankshaft is placed in the V-shaped groove of the long shaft bearing part in a fitting manner, the top surface of the short shaft bearing part is in contact with the lower side of the short shaft of the crankshaft in a fitting manner.
Preferably, the stub bearing comprises a bearing bolt and a bolt seat; the lower part of the bolt seat is connected with the base, and the upper part of the bolt seat is in threaded connection with a bearing bolt.
Furthermore, the pressing block is connected with a hydraulic oil cylinder for controlling the lifting of the pressing block.
Compared with the prior art, the utility model discloses a beneficial technological effect as follows:
1. the utility model discloses a compressor crankshaft mills anchor clamps for tail groove has realized the automatic alignment of high accuracy, guarantees the size and quality who mills the tail groove process. The eccentric positioning part with the inverted V-shaped profile is adopted for positioning, and the problems that the positioning is inaccurate, the tolerance exists, the influence of human operation factors is caused and the like in the prior art are solved.
2. The utility model discloses a compressor bent axle mills anchor clamps for tail groove adopts minor axis bearing portion as the auxiliary stay point, avoids the bent axle perk when the location.
3. The utility model discloses a compressor crankshaft mills anchor clamps for tail groove adopts first, second slide rail as supplementary mechanism that goes up and down, has guaranteed eccentric positioning portion gliding stability of going up and down.
4. The utility model discloses a compressor bent axle mills anchor clamps for tail groove is applicable in the different bent axles of shaft diameter to can adjust eccentric location portion's position through the jackscrew as required.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is a schematic perspective view of the embodiment shown in fig. 1.
Fig. 3 is a schematic sectional view at the eccentric positioning portion in the embodiment shown in fig. 1.
Fig. 4 is a schematic structural view of a crankshaft according to the present invention.
FIG. 5 is a schematic illustration of another angle of the crankshaft of FIG. 4.
Description of reference numerals in the drawings:
1. a base;
2. a long shaft bearing part;
3. a short shaft bearing part;
4. an eccentric positioning portion;
5. a compression block;
6. a guide plate;
7. mounting blocks;
8. a first slide rail;
9. a second slide rail;
10. a first slider;
11. a second slider;
12. a first cylinder;
13. a second cylinder;
14. supporting the bolt;
15. a bolt seat;
16. a hydraulic cylinder;
A. a crankshaft;
a1, a short shaft;
a2, an eccentric shaft;
a3, a long shaft;
a4, a tail groove.
Detailed Description
The utility model provides a compressor bent axle mills anchor clamps for tail groove is for example when milling tail groove process for the air compressor bent axle that fig. 4, fig. 5 show, especially in the mass production in-process, can reach automatic centering alignment, reaches the purpose of quality mistake proofing. The basic principle is that a long shaft A3 and a short shaft A1 of a crankshaft A are used as positioning references, the eccentric distance of the outer circle of an eccentric shaft A2 is used for alignment, and then clamping and tail groove milling are carried out. The main improvement of this scheme lies in providing a new mode of carrying out the alignment to eccentric shaft A2 and having utilized some auxiliary positioning and some other standard accessories to realize more accurate location alignment, and adopt the machine to replace artifical automatic operation, avoid processing the tail groove and appear the symmetry and be not conform to the condition of requirement.
Referring to fig. 1 to 3, the clamp for milling the tail groove of the compressor crankshaft of the present invention includes a base 1, wherein the base 1 is, for example, plate-shaped and can be installed and fixed on a machine tool for milling the tail groove. The base 1 is provided with a long bearing support part 2 at one end (rear end), a short shaft support part 3 at the other end (front end), and an eccentric positioning part 4 between the long bearing support part 2 and the short shaft support part 3. A liftable pressing block 5 is arranged above the long shaft bearing part 2. The eccentric positioning part 4 has a symmetrical inverted V-shaped profile, and the eccentric positioning part 4 is further connected with a lifting mechanism for controlling the lifting of the eccentric positioning part.
In a particularly preferred embodiment, the long bearing support part 2 is a long V-shaped block with a V-shaped groove on the upper surface, and the top surface of the short bearing support part 3 is a plane and is adapted to the height of the long bearing support part 2 (so that the crankshaft a can be horizontally placed). The stub bearing 3 is mainly composed of a bearing bolt 14 and a bolt seat 15, for example, the lower side of the bolt seat 15 is connected with the base 1, the upper side of the bolt seat 15 is connected with the bearing bolt 14 in a threaded mode, and the height of the top face of the stub bearing 3 can be adjusted by screwing the bearing bolt 14. The eccentric positioning part 4 is a U-shaped thick plate-shaped block, and both ends of the upper part of the block are inclined inward to form an inverted V-shaped contour.
When the crankshaft support device is used, the crankshaft A is horizontally placed on the long shaft support part 2 and the short shaft support part 3, the eccentric positioning part 4 is located at an initial state (high position), and the inverted V-shaped outline is located right above the eccentric shaft A2. Two sides of a long shaft A3 of the crankshaft A are arranged in the V-shaped groove of the long shaft bearing part 2 in a fitting mode, and the top surface of the short shaft bearing part 3 is in contact with the lower side of a short shaft A1 of the crankshaft A in a fitting mode. The positioning of the central axis of the crankshaft A is realized by the long bearing support part 2 and the long shaft A3, and the short shaft bearing support part 3 is not subjected to excessive constraint and is only used as an auxiliary support to avoid the crankshaft A from tilting during the positioning. When the positioning is performed, the eccentric positioning portion 4 moves downward, the two sides of the inverted V-shaped profile contact the two sides of the eccentric shaft A2 of the crankshaft a, and the inverted V-shaped profile is symmetrical left and right, so that the eccentric shaft A2 can be ensured to be rotated to be symmetrical left and right when the inverted V-shaped profile is completely attached to the eccentric shaft A2.
The eccentric positioning part 4 of the scheme does not adopt a structure with the same size as the eccentric shaft A2 in the prior art, but performs positioning through two symmetrical inclined planes in an inverted V shape, fundamentally solves the problem of size tolerance in the background technology, and can be suitable for crankshafts A with different shaft diameters.
Still preferably, as shown in fig. 3, two sides of the bottom of the eccentric positioning portion 4 are connected with the guide plate 6 through screws/jackscrews, for example, two sides of the bottom of the eccentric positioning portion 4 are provided with flanges and screw holes, and the guide plate 6 is also provided with screw holes at corresponding positions, so as to fix the two by screw connection; two sides of the guide plate 6 are respectively connected with a lifting mechanism, and the lifting mechanism ensures that the output end moves longitudinally. This enables fine adjustment of the position of the eccentric positioning portion 4 to be achieved by the screw/jackscrew thread arrangement when required.
Further preferably, the bottom of the eccentric positioning portion 4 extends downwards to form a mounting block 7 in a plate shape, for example, the guide plate 6 is a left independent part and a right independent part, and the guide plate 6 is accommodated in the middle gap, or the guide plate 6 is an integral structure and is provided with an accommodating groove for accommodating the guide plate 6 in the middle, and the like; in summary, the guide plate 6 has a space for accommodating the mounting block 7, so that the eccentric positioning portion 4 can be inserted into the guide plate 6 and slid, and is convenient to assemble and adjust, and the eccentric positioning portion 4 is fixed by a screw/jackscrew after being positioned. In order to clearly show the structure of the mounting block 7, the eccentric positioning portion 4 is not mounted and connected to the guide plate 6 in fig. 1 and 2, and the eccentric positioning portion 4 can be mounted by moving downward in the illustrated position.
The lifting mechanism is preferably realized by adopting a cylinder and a slide rail mode with lower cost, and comprises a first slide rail 8 and a second slide rail 9 which are respectively arranged at the left side and the right side of the eccentric positioning part 4, a first slide block 10 and a second slide block 11 are respectively connected on the first slide rail 8 and the second slide rail 9 in a sliding way, and the first slide block 10 and the second slide block 11 are respectively connected with a first cylinder 12 and a second cylinder 13; the first slider 10 and the second slider 11 are connected to the guide plate 6, respectively. In an embodiment with high space utilization, as shown in fig. 1 and 2, a first cylinder 12 and a second cylinder 13 are respectively located on two sides of a bolt seat 15 on a bottom plate 1, a piston rod of the cylinder faces upward, and the upper end of the cylinder is vertically connected with a horizontal connecting plate, so as to be connected with a corresponding slide block. The guide plate 6 is connected to the bottom, front side, or inner upper end of the first slider 10 and the second slider 11 by screws/screws. The first slide rail 8 and the second slide rail 9 can be standard linear rails and are mounted on two vertical plates located at the left and right sides of the eccentric positioning portion 4. Specifically, for example, as shown in the right second slide rail 9 of fig. 1, the front face of the vertical plate is provided with a protrusion at the left side, and provided with a jack screw at the right side, and the protrusion and the jack screw are abutted against the second slide rail 9. The jackscrew and the protuberance can be provided with an upper group and a lower group.
By adopting the lifting mechanism, the eccentric positioning part 4 is kept in a lifting state under the action of the first cylinder and the second cylinder in an initial state, after the crankshaft A is placed, the starting button on the clamp (or externally connected) is pressed, the piston rods of the first cylinder and the second cylinder on two sides synchronously descend under the self-weight of the eccentric positioning part 4, the guide plate 6 and other components or the driving of the cylinders, and the pressure is applied to the excircle of the eccentric shaft A2 to achieve the aim of alignment. The first slide rail 8 and the second slide rail 9 are used for ensuring the stability of the lifting and sliding of the eccentric positioning part 4, and the accuracy of centering and positioning is improved; the short shaft bearing part is used as an auxiliary supporting point, so that the crankshaft A is effectively prevented from tilting during positioning.
For the clamping after the centering and positioning is completed, optionally, the pressing block 5 is connected with a hydraulic oil cylinder 16 for controlling the lifting of the pressing block, the hydraulic oil cylinder 16 is arranged on one side of the long shaft bearing part 2, a piston rod of the hydraulic oil cylinder 16 faces upward, and the upper end of the hydraulic oil cylinder is vertically connected with a horizontal connecting plate, so as to be connected with the pressing block 5. And after clamping, the tail groove milling process can be carried out. The whole process is controlled by a machine, so that errors caused by manual operation are avoided, and the working efficiency and the processing quality are improved.
It should be noted that the main feature of this solution lies in this unique positioning mode, that is, the long axis is used for positioning, and the short axis is used for auxiliary positioning, and then the crankshaft is rotated by the inverted V-shaped profile moving downward to reach the symmetrical position. Therefore, the technical solution covered by the present invention is not limited to the illustrated embodiment, for example, the present invention may also be a gantry structure, and the hydraulic cylinder 16 of the pressing block 5 and the lifting mechanism of the eccentric positioning portion 4 are arranged on the gantry beam; if the eccentric positioning part 4 directly adopts an inverted V-shaped block; if the lifting mechanism can be replaced by a linear motor with higher cost; and so on. Similar structures are conceivable.
Claims (10)
1. The clamp for milling the tail groove of the crankshaft of the compressor is characterized by comprising a base (1), wherein one end of the base (1) is provided with a long bearing support part (2), the other end of the base is provided with a short bearing support part (3), and an eccentric positioning part (4) is arranged between the long bearing support part (2) and the short bearing support part (3); a liftable compression block (5) is arranged above the long bearing support part (2); the eccentric positioning part (4) is provided with a symmetrical inverted V-shaped profile, and the eccentric positioning part (4) is also connected with a lifting mechanism for controlling the lifting of the eccentric positioning part.
2. The clamp for milling the tail groove of the compressor crankshaft as claimed in claim 1, wherein the eccentric positioning part (4) is a U-shaped block, and the upper two ends of the U-shaped block are inclined inwards to form the inverted V-shaped profile.
3. The clamp for milling the tail groove of the compressor crankshaft as claimed in claim 1, wherein two sides of the bottom of the eccentric positioning part (4) are connected with guide plates (6), and two sides of the guide plates (6) are respectively connected with the lifting mechanism.
4. The clamp for milling the tail groove of the compressor crankshaft according to claim 3, characterized in that a mounting block (7) extends downwards from the bottom of the eccentric positioning portion (4), and the guide plate (6) has a space for accommodating the mounting block (7).
5. The clamp for milling the tail groove of the crankshaft of the compressor according to claim 3, wherein the lifting mechanism comprises a first slide rail (8) and a second slide rail (9) which are respectively arranged at two sides of the eccentric positioning portion (4), the first slide rail (8) and the second slide rail (9) are respectively connected with a first slide block (10) and a second slide block (11) in a sliding manner, and the first slide block (10) and the second slide block (11) are respectively connected with a first air cylinder (12) and a second air cylinder (13); the first sliding block (10) and the second sliding block (11) are respectively connected with the guide plate (6).
6. The clamp for milling the tail groove of the compressor crankshaft as claimed in claim 5, characterized in that a jackscrew for adjusting the position is arranged on the guide plate (6) and/or the eccentric positioning part (4).
7. The clamp for milling the tail groove of the compressor crankshaft as claimed in any one of claims 1 to 6, wherein the upper surface of the long shaft bearing part (2) is provided with a V-shaped groove.
8. The fixture for milling the tail groove of the compressor crankshaft as claimed in claim 7, wherein the top surface of the short shaft bearing part (3) is a plane, and when the long shaft of the crankshaft is fittingly placed in the V-shaped groove of the long shaft bearing part (2), the top surface of the short shaft bearing part (3) is fittingly contacted with the lower side of the short shaft of the crankshaft.
9. The clamp for milling the tail groove of the compressor crankshaft as claimed in claim 8, characterized in that the short shaft bearing part (3) comprises a bearing bolt (14) and a bolt seat (15); the lower part of the bolt seat (15) is connected with the base (1), and the upper part of the bolt seat (15) is in threaded connection with the supporting bolt (14).
10. The clamp for milling the tail groove of the compressor crankshaft as claimed in claim 1, wherein the pressing block (5) is connected with a hydraulic oil cylinder (16) for controlling the lifting thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222712461.4U CN218426915U (en) | 2022-10-14 | 2022-10-14 | Clamp for milling tail groove of compressor crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222712461.4U CN218426915U (en) | 2022-10-14 | 2022-10-14 | Clamp for milling tail groove of compressor crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218426915U true CN218426915U (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222712461.4U Active CN218426915U (en) | 2022-10-14 | 2022-10-14 | Clamp for milling tail groove of compressor crankshaft |
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| Country | Link |
|---|---|
| CN (1) | CN218426915U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117103118A (en) * | 2023-08-30 | 2023-11-24 | 重庆美心翼申机械股份有限公司 | An eccentric shaft grinding fixture |
-
2022
- 2022-10-14 CN CN202222712461.4U patent/CN218426915U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117103118A (en) * | 2023-08-30 | 2023-11-24 | 重庆美心翼申机械股份有限公司 | An eccentric shaft grinding fixture |
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