We have designed and developed two CNC contoured elliptical grinders for the automotive industry. The machine tool is mainly used for multi-variety, medium and large-volume grinding of automotive steering pump stator parts, industrial vane pump stator parts and other non-circular inner curved parts, and can be self-grinded by anti-mold device Various contour cams.
In the numerical control internal grinding machine, the inner surface of the stator part of Fig. 1 needs to be processed. One of the most convenient and effective methods is to use the rotary motion of the contour cam to generate its curved path. Figure 2 is a diagram of the relationship between the stator parts processed by the contour cam. As can be seen from the figure, with different contour cams, the inner profile of different stator parts can be ground. Therefore, the self-grinding of the contoured cam on the machine tool has become the key to the design. When designing the machine tool, according to the principle of Fig. 2, we designed a set of anti-mold device, which is mounted on the CNC internal grinding machine. Through different mother parts, we can self-grind a series of contour cams on the machine tool. It solves the problem that it is difficult to develop new parts without the anti-mold device. In the actual work, we have self-grinded two cams with different curves for the user to use, and the effect is ideal.
The following describes the working principle of profiling cam forming (Fig. 3).
Firstly, the mother piece is positioned on the support plate by two positioning pins, and the end face is fastened by screws. The blank of the support plate and the contour cam is connected with the workpiece spindle through the key to make it integrated, and the wheel 1 is placed in the mother. In the inner profile of the sample piece, the wheel 1 is fixed, and the inner surface of the mother piece is closely attached to the wheel 1 by a spring provided in the body of the head box. The workpiece spindle is mounted in a pendulum body for both rotary motion and oscillating motion. When the workpiece spindle rotates at a low speed, it moves back and forth according to the radius difference of the ellipse length axis of the inner hole of the parent sample. At this time, the grinding wheel is made to feed in the axial direction and is repeatedly ground until the cam blank is completely ground. That becomes the required contour cam.
In the development of new stator parts, the relationship between “first batch from master – to contoured cam – to batch processing of stator parts†should be satisfied. In this relationship, the relationship between the wheel 1, the grinding wheel 1, the wheel 2, and the grinding wheel 2 is very important. No matter how the size of the non-circular inner surface of the stator part changes, the radius of curvature is as long as the following relationship is satisfied. You can meet the requirements. which is D sand 1 = D wheel 2 D wheel 1 = D sand 2
This relationship can also be clearly seen from Figures 2 and 3.
The machining accuracy of the contour cam directly affects the grinding quality of the stator parts. The accuracy of the contour cam mainly refers to: the roughness of the cam surface; the positional deviation of the cam profile curve with respect to its center of rotation; the contour error of the cam itself. In the actual work, we found that the main factor affecting the self-grinding accuracy of the cam is the accuracy of the mother sample body. The higher the precision of the supplied parent piece, the better the self-grinding cam accuracy.
If you want to obtain a high-precision contoured cam, you can compare the profiling cams obtained by the machine self-grinding through the magnifier to find the inferior points, and then carefully trimmed by the advanced model.
The anti-module device is arranged on the CNC contouring internal grinding machine. As long as the sample piece can simplify the manufacture of the profiling cam (especially the parts of the unknown curve), it does not have to be programmed according to the curve data as in the conventional method, and then The camber is machined on the CNC cylindrical grinding machine or the coordinate grinding machine, and then mounted on the CNC contouring internal grinding machine, so that more new parts can be developed quickly and well to meet the different needs of the market.
|
1 Working principle
In the numerical control internal grinding machine, the inner surface of the stator part of Fig. 1 needs to be processed. One of the most convenient and effective methods is to use the rotary motion of the contour cam to generate its curved path. Figure 2 is a diagram of the relationship between the stator parts processed by the contour cam. As can be seen from the figure, with different contour cams, the inner profile of different stator parts can be ground. Therefore, the self-grinding of the contoured cam on the machine tool has become the key to the design. When designing the machine tool, according to the principle of Fig. 2, we designed a set of anti-mold device, which is mounted on the CNC internal grinding machine. Through different mother parts, we can self-grind a series of contour cams on the machine tool. It solves the problem that it is difficult to develop new parts without the anti-mold device. In the actual work, we have self-grinded two cams with different curves for the user to use, and the effect is ideal.
The following describes the working principle of profiling cam forming (Fig. 3).
|
|
Firstly, the mother piece is positioned on the support plate by two positioning pins, and the end face is fastened by screws. The blank of the support plate and the contour cam is connected with the workpiece spindle through the key to make it integrated, and the wheel 1 is placed in the mother. In the inner profile of the sample piece, the wheel 1 is fixed, and the inner surface of the mother piece is closely attached to the wheel 1 by a spring provided in the body of the head box. The workpiece spindle is mounted in a pendulum body for both rotary motion and oscillating motion. When the workpiece spindle rotates at a low speed, it moves back and forth according to the radius difference of the ellipse length axis of the inner hole of the parent sample. At this time, the grinding wheel is made to feed in the axial direction and is repeatedly ground until the cam blank is completely ground. That becomes the required contour cam.
2 The relationship between the wheel and the grinding wheel
In the development of new stator parts, the relationship between “first batch from master – to contoured cam – to batch processing of stator parts†should be satisfied. In this relationship, the relationship between the wheel 1, the grinding wheel 1, the wheel 2, and the grinding wheel 2 is very important. No matter how the size of the non-circular inner surface of the stator part changes, the radius of curvature is as long as the following relationship is satisfied. You can meet the requirements. which is
This relationship can also be clearly seen from Figures 2 and 3.
3 Grinding accuracy of the contour cam
The machining accuracy of the contour cam directly affects the grinding quality of the stator parts. The accuracy of the contour cam mainly refers to: the roughness of the cam surface; the positional deviation of the cam profile curve with respect to its center of rotation; the contour error of the cam itself. In the actual work, we found that the main factor affecting the self-grinding accuracy of the cam is the accuracy of the mother sample body. The higher the precision of the supplied parent piece, the better the self-grinding cam accuracy.
If you want to obtain a high-precision contoured cam, you can compare the profiling cams obtained by the machine self-grinding through the magnifier to find the inferior points, and then carefully trimmed by the advanced model.
4 Conclusion
The anti-module device is arranged on the CNC contouring internal grinding machine. As long as the sample piece can simplify the manufacture of the profiling cam (especially the parts of the unknown curve), it does not have to be programmed according to the curve data as in the conventional method, and then The camber is machined on the CNC cylindrical grinding machine or the coordinate grinding machine, and then mounted on the CNC contouring internal grinding machine, so that more new parts can be developed quickly and well to meet the different needs of the market.
Hanger bolts are essential fasteners widely used in construction and mounting applications, and the SUS 304 Stainless Steel Hanger Bolts are particularly notable for their durability and corrosion resistance. This comprehensive classification provides an in-depth look into the various aspects of these versatile hanger bolts:
-
Material Composition:
- SUS 304 Stainless Steel: Renowned for its corrosion resistance, SUS 304 stainless steel ensures the longevity and reliability of hanger bolts, making them suitable for both indoor and outdoor applications.
-
Thread Type:
- Unified Coarse Thread (UNC): Featuring a coarse thread design, these hanger bolts are well-suited for wood-to-wood or wood-to-metal applications, providing a strong and secure connection.
-
Dual-Ended Design:
- Threaded End: One end of the hanger bolt features external threading, allowing for easy attachment to surfaces.
- Machine Threaded End: The opposite end has a machine thread, facilitating installation into pre-drilled holes or metal components.
-
Length and Diameter:
- Varied Lengths: Available in various lengths, SUS 304 Stainless Steel Hanger Bolts can accommodate different installation requirements,from 200mm to 350mm
- Diverse Diameters: Multiple diameter options cater to specific load-bearing needs in various projects,from M6 to M12.
-
Corrosion Resistance:
- Passivation Treatment: The hanger bolts undergo passivation to enhance their corrosion resistance, ensuring reliable performance in diverse environmental conditions.
-
Applications:
- Wood-to-Wood Connections: Ideal for securely connecting wooden components, such as in furniture assembly or construction projects.
- Hanging Fixtures: Suitable for hanging various fixtures, shelves, or objects from walls or ceilings with stability and strength.
The SUS 304 Stainless Steel Hanger Bolts offer a versatile and durable solution for a wide range of applications, combining strength, corrosion resistance, and ease of installation.
solar energy,photovoltaic solar panel roof screw,solar mounting hanger bolts,solar tile fixing screw,solar fixation,solar panel height adjustable bolts with nuts and washers
Taizhou Wanluo Hardware Products Co., Ltd. , https://www.wlhardware.com