Eccentric volute hydraulic clamp
The multi-support structure of the eccentric volute hydraulic clamp solves the problem of difficult positioning of the volute inlet flange, achieving stable and reliable processing and reducing the scrap rate.
Patent Information
- Application Number
- CN202520147341.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Positioning is difficult when machining the volute inlet flange, resulting in a high product defect rate.
An eccentric volute hydraulic clamp is used to fix the workpiece through multiple support components, including a base plate, a cutting section, and the first to fifth support sections. The combination of support rods and support blocks provides stable fixation and prevents vibration during processing.
This improved the success rate of processing, reduced the scrap rate of products, and ensured the stability and reliability of processing.
Smart Images
Figure CN223790008U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of volute machining fixtures, and in particular to an eccentric volute hydraulic fixture. Background Technology
[0002] Currently, the country has very strict emission requirements. Due to its unique supercharging and emission reduction effect, the turbocharger is widely used in the automotive market. Many cars use turbocharger engines. A turbocharger is actually a kind of air compression. It uses the inertial force of the exhaust gas from the engine to drive the turbine. The turbine then drives the coaxial impeller. The impeller compresses the air sent from the air filter pipe and pressurizes it to enter the cylinder.
[0003] The volute is one of the important components of a turbocharger, such as... Figure 7 The diagram shows the structure of the volute. The volute has a flange structure for its channel and a snap-fit surface on the back. For this type of volute, the intake flange at the intake end is usually machined first to serve as a positioning reference for other processes. However, positioning the intake flange is difficult when machining it. Using ordinary positioning fixtures results in a high defect rate. Therefore, a solution is urgently needed.
[0004] Therefore, the above problems are solved by using an eccentric volute hydraulic clamp. Summary of the Invention
[0005] The purpose of this invention is to provide an eccentric volute hydraulic clamp to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a base plate is provided, and the top of the base plate is provided with a cutting part, a first support part, a second support part, a third support part, a fourth support part and a fifth support part, respectively. A workpiece is disposed between the first support part, the second support part, the third support part, the fourth support part and the fifth support part, and supports it.
[0007] Preferably, the first support portion is located on the upper left side of the chip portion, the second support portion is located on the right side of the first support portion, the third support portion is located on the lower right side of the chip portion, the fourth support portion is located on the right side of the third support portion, and the fifth support portion is located at one end of the chip portion.
[0008] Preferably, the workpiece includes a main body, one end of which is provided with a third snap-fit surface, the outer circular surface of which is provided with a channel, the end of which is away from the main body is provided with a snap-fit surface, the side of which is provided with a first snap-fit interface and a second snap-fit interface, and the bottom of which is provided with a support end.
[0009] Preferably, the fifth support part includes a mounting post disposed at the front end of the chip section, and a support rod is provided at one end of the mounting post, the support rod passing through the third snap-fit surface tube and supporting the inside of the workpiece.
[0010] Preferably, the first support portion is located below the card contact surface, the first support portion supports the support end, and the positioning slot at the top of the first support portion is located at the first card interface.
[0011] Preferably, the second support portion is connected to the second card interface.
[0012] Preferably, the third support portion supports the main body.
[0013] Preferably, the fourth support part includes a support column disposed on the base plate, a rotating shaft is disposed through the end face of the support column, a first support block is disposed at one end of the rotating shaft, an mounting block is disposed above the support column, an mounting shaft is disposed at the end face of the mounting block, and a second support block is disposed on the outer circular surface of the mounting shaft.
[0014] Preferably, the first support block and the second support block are engaged with the third engagement surface.
[0015] The technical effects and advantages of this utility model are as follows:
[0016] 1. The utility model features a V-shaped support column at the top, with a mounting block installed on one cross section of the V-shape. The mounting block is used to fix the mounting shaft, which drives the second support block to rotate, causing the clamping end of the second support block to contact the third snap-fit surface, providing a downward holding force to the workpiece. The upward supporting force provided by the first support block and the downward holding force provided by the second support block together fix the workpiece. By adding a fourth support part, the fourth support part can press and fix the workpiece, making the operation convenient, simple, and the positioning reliable and stable.
[0017] 2. One end of the main body of this utility model is a snap-fit surface, and the other end is close to the cutting part. The snap-fit surface of the channel is used to support the first support part and the second support part. The third snap-fit surface is located at the fourth support part. The main body is supported by the third support part, so that the workpiece is fixed between the support parts, preventing the workpiece from vibrating during processing and improving the success rate of processing. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0019] Figure 2 This is a top view of the overall structure of this utility model.
[0020] Figure 3 This is a schematic diagram of the fifth support part of this utility model.
[0021] Figure 4 This is a front view structural diagram of the fifth support part of this utility model.
[0022] Figure 5 This is a schematic diagram of the fourth support part of this utility model.
[0023] Figure 6 This is a schematic diagram of the cooperation structure between the first support block and the second support block of this utility model.
[0024] Figure 7 This is a schematic diagram of the workpiece structure of this utility model.
[0025] In the diagram: 1. Base plate; 2. Chip cutting section; 3. First support section; 4. Second support section; 5. Third support section; 6. Fourth support section; 601. Support column; 602. Rotating shaft; 603. First support block; 604. Mounting block; 605. Mounting shaft; 606. Second support block; 7. Workpiece; 701. First locking interface; 702. Support end; 703. Second locking interface; 704. Third locking surface; 8. Fifth support section; 801. Mounting column; 802. Support rod. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0027] Currently, many cars use turbocharged engines. A turbocharger is actually a type of air compressor. It uses the inertial force of the exhaust gas from the engine to drive a turbine, which in turn drives a coaxial impeller. The impeller compresses the air supplied by the air filter and forces it into the cylinder.
[0028] The volute is one of the important components of a turbocharger, such as... Figure 7 The diagram shows the structure of the volute. The volute has a flange structure for its channel and a snap-fit surface on the back. For this type of volute, the intake flange at the intake end is usually machined first to serve as a positioning reference for other processes. However, positioning the intake flange is difficult when machining it. Using ordinary positioning fixtures results in a high defect rate. Therefore, a solution is urgently needed.
[0029] This utility model provides, for example Figures 1 to 7An eccentric volute hydraulic clamp is shown, comprising a base plate 1. The top of the base plate 1 is provided with a cutting part 2, a first support part 3, a second support part 4, a third support part 5, a fourth support part 6 and a fifth support part 8 respectively. A workpiece 7 is disposed between the first support part 3, the second support part 4, the third support part 5, the fourth support part 6 and the fifth support part 8, and supports it.
[0030] In use, the base plate 1 supports the first support part 3, the second support part 4, the third support part 5, the fourth support part 6 and the fifth support part 8, and supports the workpiece 7, fixing the workpiece 7 between the support parts. Then, the chipping part 2 cuts the volute.
[0031] The first support part 3 is located on the upper left side of the chip part 2, the second support part 4 is located on the right side of the first support part 3, the third support part 5 is located on the lower right side of the chip part 2, the fourth support part 6 is located on the right side of the third support part 5, and the fifth support part 8 is located at one end of the chip part 2.
[0032] In use, the first support part 3, the second support part 4, the third support part 5, and the fourth support part 6 are arranged in a quadrilateral shape, and the fifth support part 8 is located between the quadrilaterals to provide overall support for the workpiece 7, so that the chip cutting part 2 is protected from damage to the volute during the chip cutting process.
[0033] The workpiece 7 includes a main body, a third snap-fit surface 704 is provided at one end of the main body, a channel is provided on the outer circular surface of the main body, a snap-fit surface is provided at the end of the channel away from the main body, a first snap-fit interface 701 and a second snap-fit interface 703 are provided on the side of the snap-fit surface, and a support end 702 is provided below the snap-fit surface.
[0034] When in use, one end of the main body is a snap-fit surface, and the other end is close to the chip section 2. The snap-fit surface of the channel is used to support the first support section 3 and the second support section 4. The third snap-fit surface 704 is located at the fourth support section 6. The main body is supported by the third support section 5, so that the workpiece 7 is fixed between the support sections, preventing the workpiece from vibrating during processing and improving the success rate of processing.
[0035] The fifth support part 8 includes a mounting post 801 disposed at the front end of the chip part 2. One end of the mounting post 801 is provided with a support rod 802, which passes through the third snap-fit surface 704 and supports the inside of the workpiece 7.
[0036] In use, the support rod 802 passes through the third snap-fit surface 704, so that the support rod 802 is located inside the main body. The support rod 802 supports the workpiece 7 as a whole. Then, the workpiece 7 is further fixed by the first support part 3, the second support part 4, the third support part 5, and the fourth support part 6, so that the support part presses and fixes the workpiece 7. The operation is convenient and simple, and the positioning is reliable and stable.
[0037] The first support part 3 is located below the card contact surface, the first support part 3 supports the support end 702, and the positioning slot at the top of the first support part 3 is located at the first card interface 701.
[0038] The second support part 4 is connected to the second card interface 703.
[0039] In use, the first support part 3 supports the support end 702 of the snap-fit surface. The top of the first support part 3 is provided with a positioning groove, which snaps into the first snap-fit interface 701.
[0040] After the positioning slot engages with the first card interface 701, the engagement end of the second support part 4 engages with the second card interface 703, thus completing the engagement of the channel.
[0041] The third support part 5 supports the main body.
[0042] When in use, when the main body is close to the chip section 2, the outer circular surface is symmetrically provided with snap-fit ears. The third support part 5 applies downward pressure to the snap-fit ears. At this time, the support rod 802 is located inside the main body and provides support force to the main body. The third support part 5 applies downward pressure to the main body, which further increases the stability of the workpiece 7.
[0043] The fourth support part 6 includes a support column 601 disposed on the base plate 1. A rotating shaft 602 is disposed through the end face of the support column 601. A first support block 603 is disposed at one end of the rotating shaft 602. An installation block 604 is disposed above the support column 601. An installation shaft 605 is disposed at the end face of the installation block 604. A second support block 606 is disposed on the outer circular surface of the installation shaft 605.
[0044] The first support block 603 and the second support block 606 are engaged with the third snap-fit surface 704.
[0045] During use, it was discovered during the processing that black film appeared in the subsequent processing of the vent flange. The location of the black film is shown below. Figure 7 On the first day, 100 pieces were produced, and 8 pieces had black skin, resulting in a very high scrap rate. Moreover, the black skin appeared in very close locations. On the second day, 100 pieces were produced, and 7 pieces had black skin, again resulting in a very high scrap rate. Moreover, the black skin appeared in relatively concentrated locations. After two days of trial production, it was determined that the current process was not suitable for mass production.
[0046] By adding a fourth support part 6, the top of the support column 601 of the fourth support part 6 is V-shaped, and the rotating shaft 602 passes through the end face of the support column 601 to adjust the support angle of the first support block 603. By rotating the rotating shaft 602, the first support block 603 is driven to rotate, and then the support surface of the first support block 603 contacts the third snap-fit surface 704, providing an upward support force to the workpiece 7.
[0047] The top of the support column 601 has a V-shape, and a mounting block 604 is installed on one section of the V-shape. The mounting block 604 is used to fix the mounting shaft 605. The mounting shaft 605 drives the second support block 606 to rotate, so that the clamping end of the second support block 606 contacts the third snap-fit surface 704, providing a downward holding force to the workpiece 7. The upward supporting force provided by the first support block 603 and the downward holding force provided by the second support block 606 form a fixation of the workpiece 7. By adding a fourth support part 6, the fourth support part 6 presses and fixes the workpiece 7 tightly. The operation is convenient and simple, and the positioning is reliable and stable.
[0048] The second support block 606 consists of a first fixing block, a first rod, and a second fixing block. The first fixing block is mounted on the mounting shaft 605 and rotated by the mounting shaft 605. The end face of the first fixing block is connected to the first rod. The angle between the first fixing block and the first rod is 130 degrees, and the angle between the first rod and the second fixing block is 130 degrees, forming a Z-shaped second support block 606.
[0049] Working principle
[0050] During the processing, it was discovered that black scale appeared in the subsequent processing of the vent flange. The location of the black scale is shown below. Figure 4 On the first day, 100 units were produced, and 8 units developed black residue, resulting in a very high scrap rate, with the residue appearing in very close proximity. On the second day, 100 units were produced, and 7 units developed black residue, again with a very high scrap rate and the residue appearing in relatively concentrated areas. After two days of trial production, it was determined that the current process is not suitable for mass production and requires immediate improvement. Following a review by relevant professionals, the following measures were implemented:
[0051] Analysis of possible causes and countermeasures:
[0052] 1. The dimensions of the positioning part of the casting blank have a large error; 3D scanning is used for confirmation.
[0053] 2. Inappropriate fixture positioning leads to error accumulation, repeated positioning of a single product, and the use of a laser probe to measure the height of the fixed point.
[0054] Investigation results:
[0055] 1. After 3D scanning, it was found that the dimensions of the blank positioning part were all within the tolerance range, thus ruling out this cause.
[0056] 2. For repeated positioning of a single product, the height of the fixed point was measured using a laser probe. The statistical data is as follows:
[0057] Serial Number Altitude data Theoretical value error 1 8.84 8.64 0.2 2 8.94 8.64 0.3 3 9.1 8.64 0.46 4 8.64 8.64 0 5 8.5 8.64 -0.14 6 9.12 8.64 0.48 7 8.55 8.64 -0.09 8 8.3 8.64 -0.34 9 8.32 8.64 -0.32 10 9.2 8.64 0.56
[0058] Statistical analysis revealed that the height of the fixing point fluctuated greatly after each product clamping, reaching a maximum of nearly 0.6mm. Some positions were higher than the theoretical position, while others were lower.
[0059] The investigation concluded that the fixture system has problems and needs to be optimized to ensure that the positional changes of the fixing points can be controlled after repeated clamping of the product.
[0060] Therefore, after investigation, a problem was found in the positioning and clamping of the fixture. Following a review by the team, it was determined that the volute cylinder was too short, and the product's exhaust flange was too far from the positioning position. Even a slight deviation at the positioning end would cause a large deviation at the exhaust flange, resulting in a black film appearance during machining. Considering cost, it was decided to add a fourth support part 6 at the exhaust flange location to improve the fixture. The design is as follows: Figure 5 We will consider whether to redesign the entire fixture structure based on the verification results.
[0061] Serial Number Altitude data Theoretical value error 1 8.74 8.64 0.1 2 8.86 8.64 0.22 3 8.88 8.64 0.24 4 8.61 8.64 -0.03 5 8.5 8.64 -0.14 6 8.56 8.64 -0.08 7 8.55 8.64 -0.09 8 8.69 8.64 0.05 9 8.48 8.64 -0.16 10 8.86 8.64 0.22
[0062] Statistical analysis revealed that although the height of the fixed point fluctuated after each product clamping, the maximum value after fixture optimization was less than 0.3mm, which is within the allowable tolerance range.
[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An eccentric volute hydraulic clamp, characterized in that: The base plate (1) is provided with a cutting part (2), a first support part (3), a second support part (4), a third support part (5), a fourth support part (6) and a fifth support part (8) respectively at its top end. A workpiece (7) is provided between the first support part (3), the second support part (4), the third support part (5), the fourth support part (6) and the fifth support part (8) and supports it.
2. The eccentric volute hydraulic clamp according to claim 1, characterized in that: The first support part (3) is located on the upper left side of the chip part (2), the second support part (4) is located on the right side of the first support part (3), the third support part (5) is located on the lower right side of the chip part (2), the fourth support part (6) is located on the right side of the third support part (5), and the fifth support part (8) is located at one end of the chip part (2).
3. The eccentric volute hydraulic clamp according to claim 2, characterized in that: The workpiece (7) includes a main body, a third snap-fit surface (704) is provided at one end of the main body, a channel is provided on the outer circular surface of the main body, a snap-fit surface is provided at the end of the channel away from the main body, a first snap-fit interface (701) and a second snap-fit interface (703) are provided on the side of the snap-fit surface, and a support end (702) is provided below the snap-fit surface.
4. The eccentric volute hydraulic clamp according to claim 3, characterized in that: The fifth support part (8) includes a mounting post (801) disposed at the front end of the chip part (2), and a support rod (802) is provided at one end of the mounting post (801). The support rod (802) passes through the third snap-fit surface (704) and supports the inside of the workpiece (7).
5. An eccentric volute hydraulic clamp according to claim 4, characterized in that: The first support part (3) is located below the card contact surface. The first support part (3) supports the support end (702). The positioning slot at the top of the first support part (3) is located at the first card interface (701).
6. The eccentric volute hydraulic clamp according to claim 5, characterized in that: The second support part (4) is connected to the second card interface (703).
7. An eccentric volute hydraulic clamp according to claim 6, characterized in that: The third support part (5) supports the main body.
8. The eccentric volute hydraulic clamp according to claim 3, characterized in that: The fourth support part (6) includes a support column (601) disposed on the base plate (1). A rotating shaft (602) is disposed through the end face of the support column (601). A first support block (603) is disposed at one end of the rotating shaft (602). An mounting block (604) is disposed above the support column (601). An mounting shaft (605) is disposed on the end face of the mounting block (604). A second support block (606) is disposed on the outer circular surface of the mounting shaft (605).
9. An eccentric volute hydraulic clamp according to claim 8, characterized in that: The first support block (603) and the second support block (606) are engaged with the third snap-fit surface (704).