Flexible turning device for compressor shell
By using a flexible clamping device consisting of spring clips and a pneumatic tailstock, the problems of poor coaxiality of the compressor housing and thin-wall deformation were solved, enabling high-precision machining and reducing cutting vibration and dimensional deviations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YUNFEI IND & TRADING DEV CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-17
AI Technical Summary
The existing compressor housing has a two-section differential structure, which results in a large difference in coaxiality. Traditional clamping methods are inefficient and have large cumulative errors. Thin walls are prone to deformation, chatter and thermal deformation are likely to occur during the cutting process, affecting machining accuracy and surface roughness.
A flexible clamping device combining spring clips and a pneumatic tailstock is used. Through the elastic expansion of the spring clips and the dynamic tightening of the pneumatic tailstock, uniform clamping and stable positioning are achieved, avoiding tool skipping and adapting to workpieces of different sizes.
High-precision machining of the compressor housing was achieved, reducing repeated clamping errors and thermal deformation, and improving machining accuracy and the versatility of the device.
Smart Images
Figure CN224129137U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor machining technology, specifically a flexible machining device for compressor housings. Background Technology
[0002] The existing compressor housing has a two-section differential structure with inner diameters of Φ237mm and Φ235mm respectively. When clamped by a traditional three-jaw chuck, the uneven distribution of radial clamping force due to the dimensional difference between the two reference surfaces easily leads to large differences in coaxiality. Existing technologies mostly rely on repeated manual correction, which is not only inefficient but also causes cumulative errors due to multiple clamping, seriously affecting the machining accuracy of critical mating surfaces such as bearings. Moreover, the housing wall thickness is only 4.5mm, which is a typical thin-walled and easily deformable part. Traditional rigid clamping schemes have drawbacks, resulting in obvious chatter during cutting, causing tool jump and excessive surface roughness. At the same time, it can also cause thermal deformation due to the accumulation of cutting heat, resulting in dimensional differences. Although existing flexible tooling such as liquid plastic mandrels can improve clamping uniformity, they have problems such as response lag and poor pressure retention. In addition, because the roundness of the compressor housing is not a perfect circle, conventional clamping methods cannot be used. Summary of the Invention
[0003] To overcome the shortcomings of the prior art, this utility model provides a flexible machining device for compressor housing, which avoids the problem of different coaxiality at both ends of the compressor housing. It can also help clamp the thin-walled part that avoids gaps, provide front-end support, and reduce the problem of tool skipping during machining.
[0004] To achieve the above objectives, a flexible machining device for compressor housing is designed, including a machine head. The right side of the machine head is connected to an internal tapered connecting rod, and a support tube is sleeved on the outside of the internal tapered connecting rod. A top rod is inserted into the right side of the support tube, and the right side of the top rod abuts against a pneumatic tailstock. A pull rod passes through the machine head, with one end of the machine head penetrating the pull rod and abutting against the top rod. The other end of the pull rod is fixed to the connecting rod. A spring clip one and a spring clip two are sleeved on the support tube.
[0005] The pneumatic tailstock includes a ejector pin, a track, a slider, a slide groove, a seat, and a cylinder. The track is laid horizontally on the right side of the ejector rod, and a slider is slidably connected to the track. A seat is provided on the slider, and a cylinder is connected above the seat. One end of the ejector pin is connected to the left side of the cylinder, and the other end of the ejector pin abuts against the ejector rod.
[0006] The outer sides of the spring clip one and spring clip two are connected to the product to be processed.
[0007] The internal tapered connecting rod connects to the product positioning block.
[0008] A positioning rod is connected to the lower part of the product positioning block, and the lower end of the positioning rod is inserted into the positioning seat.
[0009] The first spring clip has an inner diameter of 235mm and is fixed to the rear end of the product to be processed. The second spring clip has an inner diameter of 237mm and is fixed to the middle and front ends of the product to be processed, respectively. A total of 6 spring clips are provided.
[0010] Compared with the prior art, this utility model has an internal spring clamp. By pulling the internal tapered connecting rod to the left, the spring clamp expands outward, which can solve the machining clamping problem caused by the roundness of the compressor housing. At the same time, a pneumatic tailstock is provided to make way for loading and unloading the housing, while reducing the jig runout and avoiding the impact of tool jump. Finally, the machining of both end faces and the inner hole can be achieved in one clamping. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model.
[0012] Figure 2 This is a cross-sectional view of the present invention.
[0013] Figure 3 This is a side view of the present invention.
[0014] Figure 4 This is a schematic diagram of the installation of the spring clip of this utility model.
[0015] See Figures 1 to 4 1 is the pneumatic tailstock, 1.1 is the ejector pin, 1.2 is the track, 1.3 is the slider, 1.4 is the slide groove, 1.5 is the seat, 1.6 is the cylinder, 2 is the first spring clip, 3 is the second spring clip, 4 is the connecting rod, 5 is the pull rod, 6 is the machine head, 7 is the product positioning block, 8 is the internal tapered connecting rod, 9 is the positioning rod, 10 is the positioning seat, 11 is the ejector pin, 12 is the support tube, and 13 is the product to be processed. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] like Figure 1 , 2 As shown, the machine head 6 is connected to the machine tool. The right side of the machine head 6 is connected to the internal tapered connecting rod 8. The support tube 12 is sleeved on the outside of the internal tapered connecting rod 8. The support tube 12 is sleeved on the outside of the tapered connecting rod 8 to provide structural support and limit the deformation range of the spring clip 1 2 and the spring clip 2 3. The right side of the support tube 12 is inserted into the push rod 11. The right side of the push rod 11 is connected to the pneumatic tailstock 1. The machine head 6 is provided with a pull rod 5. One end of the machine head 6 penetrates the pull rod 5 and abuts against the push rod 13. The other end of the pull rod 5 is fixed to the connecting rod 4. The connecting rod 4 is connected to the lathe. The support tube 12 is sleeved with the spring clip 1 2 and the spring clip 2 3. The pull rod 5 passes through the machine head 6. By pulling the tapered connecting rod 8, the spring clip 1 2 and the spring clip 2 3 are deformed to achieve the tightening or loosening of the workpiece.
[0018] like Figure 3 As shown, the pneumatic tailstock 1 includes a ejector pin 1.1, a track 1.2, a slider 1.3, a groove 1.4, a seat 1.5, and a cylinder 1.6. The track 1.2 is horizontally laid on the right side of the push rod 11. The slider 1.3 is slidably connected to the track 1.2. The seat 1.5 is mounted on the slider 1.3. The cylinder 1.6 is connected above the seat 1.6. One end of the ejector pin 1.1 is connected to the left side of the cylinder 1.6. The other end of the ejector pin 1.1 abuts against the push rod 11. The pneumatic tailstock 1 provides dynamic clamping and positioning functions. The cylinder drives the ejector pin 1.1 to achieve axial clamping or loosening of the workpiece, directly contacting the end face of the workpiece. The ejector pin 1.1 transmits the thrust of the cylinder 1.6 to achieve the clamping of the workpiece. The slider 1.3 slides along the track 1.2, driving the seat 1.5 and the cylinder 1.6 to adjust their positions.
[0019] The product to be processed 13 is sleeved on the outer side of spring clip 1 2 and spring clip 2 3.
[0020] The internal tapered connecting rod 8 connects to the product positioning block 7.
[0021] The positioning rod 9 is connected to the lower part of the product positioning block 7, and the lower end of the positioning rod 9 is inserted into the positioning seat 10.
[0022] like Figure 4 As shown, spring clamp 1 (2) has an inner diameter of 235mm and is fixed to the rear end of the product to be processed. Spring clamp 2 (3) has an inner diameter of 237mm and is fixed to the middle and front ends of the product 13 to be processed, respectively. A total of six spring clamps (12 and 3) are provided. Spring clamp 2 (3) is fitted onto the rear end of the product 13 at a diameter of 237mm. Spring clamp 2 (3) serves as an auxiliary clamping area, avoiding clamping problems caused by different coaxiality at both ends of the product 13. Spring clamp 1 (2) is fixed to the middle and front ends of the product 13 at 235mm. The middle section is the main clamping area, while the front end provides auxiliary clamping to avoid gaps in the thin-walled section, thus providing front-end support and reducing the incidence of tool skipping during machining.
[0023] The specific implementation of this utility model is as follows: The product to be processed 13 is placed on the outside of spring clamp 1 2 and spring clamp 2 3. The slider 1.3 of the pneumatic tailstock 1 slides along the track 1.2. The position of the ejector pin 1.1 is adjusted to adapt to the length of the workpiece. The cylinder 1.6 of the pneumatic tailstock 1 drives the ejector pin 1.1 to extend and press against the right end face of the workpiece. The positioning rod 9 is inserted into the product positioning block 7. The positioning rod 9 determines the radial positioning accuracy through the positioning seat 10. The connecting rod 4 is pulled, which drives the pull rod 5 to move, forcing the internal tapered connecting rod 8 to move axially. The tapered surface of the tapered connecting rod 8 pushes the spring clamp 1 2 and spring clamp 2 3 to expand elastically outward, uniformly clamping the inner part of the workpiece, especially the thin-walled part. This can solve the problem of poor roundness and concentricity of the machined product caused by poor roundness control inside the shell. During the machining process, it can be simultaneously added The flexible clamping of the inner hole and two end faces of the workpiece by spring clamps 2 and 3 reduces cutting vibration and avoids tool skipping. The clamping force of the pneumatic tailstock 1 remains stable to prevent dimensional deviations caused by thermal deformation of the workpiece. After processing, the connecting rod 4 is pulled in the opposite direction, the tapered connecting rod 8 retracts, spring clamps 2 and 3 retract, and the ejector pin 1.1 of the pneumatic tailstock 1 retracts, allowing the processed workpiece to be easily removed. The main product processed by this device is the inner shell of a compressor. Through flexible clamping and the cooperation of the pneumatic tailstock 1, the processing of both end faces and the inner hole can be achieved, reducing errors caused by repeated clamping. Spring clamps 2 and 3 apply pressure evenly to avoid deformation caused by rigid clamping, thus improving processing accuracy. The pneumatic tailstock 1 can slide along the track to adapt to workpieces of different sizes, improving the versatility of the device.
Claims
1. A flexible machining device for compressor housings, comprising a head (6), characterized in that: The machine head (6) is connected to an internal tapered connecting rod (8) on the right side. A support tube (12) is sleeved on the outside of the internal tapered connecting rod (8). A top rod (11) is inserted into the right side of the support tube (12). The right side of the top rod (11) is abutted against the pneumatic tailstock (1). A pull rod (5) is inserted through the machine head (6). One end of the machine head (6) penetrates the pull rod (5) and abuts against the top rod (11). The other end of the pull rod (5) is fixed to the connecting rod (4). A spring clip 1 (2) and a spring clip 2 (3) are sleeved on the support tube (12).
2. A flexible machine tool for machining compressor housings according to claim 1, characterized in that: The pneumatic tailstock (1) includes a push pin (1.1), a track (1.2), a slider (1.3), a groove (1.4), a seat (1.5), and a cylinder (1.6). The track (1.2) is laid horizontally on the right side of the push rod (11). The slider (1.3) is slidably connected to the track (1.2). The seat (1.5) is provided on the slider (1.3). The cylinder (1.6) is connected above the seat (1.5). One end of the push pin (1.1) is connected to the left side of the cylinder (1.6). The other end of the push pin (1.1) abuts against the push rod (11).
3. A flexible machine tool for machining compressor housings as defined in claim 1, characterized in that: The product to be processed (13) is sleeved on the outer side of the spring clip one (2) and spring clip two (3).
4. A flexible machine tool for machining compressor housings as defined in claim 1, characterized in that: The internal tapered connecting rod (8) connects to the product positioning block (7).
5. A flexible machine tool for machining compressor housings according to claim 4, characterized in that: The product positioning block (7) is connected to a positioning rod (9) below, and the lower end of the positioning rod (9) is inserted into the positioning seat (10).
6. A flexible machine tool for machining compressor housings as defined in claim 1, characterized in that: The inner diameter of the first spring clip (2) is 235mm, and it is fixed at the rear end of the product to be processed (13). The inner diameter of the second spring clip (3) is 237mm, and it is fixed at the middle and front ends of the product to be processed (13) respectively. There are a total of 6 spring clips (1, 2 and 3).