CN114457220A - A composite rolling device for surface rolling strengthening - Google Patents

Abstract

A compound rolling device for surface rolling strengthening, the device is especially suitable for the surface rolling strengthening processing of rotary parts such as circular surface, arc surface, conical surface, circular curved surface, etc. The device has a simple structure and a positioning clip. The compact structure is the same as that of the turning tool, and it is suitable for installation on the turret of the CNC lathe. The rolling of various complex rotary structures can be completed by using the CNC interpolation technology; the device is driven by a single-acting hydraulic cylinder. The trapezoidal guide rails on both sides are extended, and the driving rollers are extended. By controlling the oil supply pressure, constant pressure rolling or variable pressure rolling can be realized; when the running track of the rolling device is different from the contour of the workpiece, the pressure in the hydraulic cylinder will fluctuate. , the device can ensure that the actual pressure of the system is consistent with the theoretical pressure through the adaptive forward and backward movement of the hydraulic cylinder; when the hydraulic cylinder is not working, the spring presses the hydraulic cylinder back along the trapezoidal guide rails on both sides, and drives the roller to press back. At this time, the roller and the device are Rigid contact for powerful rolling.

Description

A composite rolling device for surface rolling strengthening

technical field

The invention relates to a compound rolling device for surface rolling strengthening, which is particularly suitable for surface rolling strengthening processing of rotating parts such as circumferential surfaces, arc surfaces, conical surfaces, and circular surfaces.

Background technique

Surface rolling strengthening is a pressure finishing method that improves the mechanical properties of the surface. It uses a rolling tool to apply a certain pressure to the surface of the workpiece, and uses the cold plastic characteristics of the metal material at room temperature to generate plastic flow on the surface of the workpiece. Fill in the valley pits remaining after the previous processing to reduce the surface roughness of the workpiece. Due to the plastic deformation of the surface layer of the workpiece after rolling, the surface structure is cold hardened, the grains are refined, and a dense fibrous shape is formed, forming a residual stress layer. Improve the surface hardness and strength, thereby improving the wear resistance, corrosion resistance and compatibility of the workpiece surface. At present, the surface rolling strengthening technology has been widely used and achieved remarkable results; the rolling device can be divided into rigid rolling device, elastic rolling device and hydraulic rolling device according to the driving mode, and the following characteristics exist in the application process:

The movement trajectory of the rigid rolling device is precisely controlled, and the rolling force and rolling depth are guaranteed. In actual work, there is a certain error between the shape trajectory of the workpiece and the motion trajectory, which may easily cause the rolling to be too deep or shallow, damage the shape of the workpiece or fail to achieve the rolling effect. , suitable for constant depth rolling or workpieces with simple rolling structure;

The rolling force of the elastic rolling device is guaranteed by its own elastic mechanism, which varies with the rolling depth. It is difficult to ensure a constant rolling force. This type of device has a certain range of adaptability and is suitable for complex structures such as rolling arcs:

The hydraulic rolling device is driven by hydraulic pressure, and the rolling force is controlled by controlling the oil supply pressure. This type of device has a certain range of self-adaptability. The rolling force has nothing to do with the motion trajectory, and can precisely control the rolling force, suitable for constant pressure rolling or rolling. Complex structures such as arcs and curved surfaces;

The literature reviewed so far shows that the research on rolling device is very mature, but it is mainly developed in a single research direction, and there is no composite rolling device specially used for surface rolling strengthening.

SUMMARY OF THE INVENTION

According to the performance characteristics of the existing rigid rolling device, elastic rolling device and hydraulic rolling device, and to solve their respective deficiencies, the present invention provides a composite rolling device for surface rolling strengthening. The device is driven by a single-acting hydraulic cylinder. When the hydraulic cylinder is working, the hydraulic cylinder extends along the trapezoidal guide rails on both sides, and the driving rollers extend. By controlling the oil supply pressure, constant pressure rolling or variable pressure rolling can be realized; There is a difference between the running track of the rolling device and the contour of the workpiece, and the pressure in the hydraulic cylinder will fluctuate. The device can ensure that the actual pressure of the system is consistent with the theoretical pressure through the adaptive forward and backward movement of the hydraulic cylinder; The trapezoidal guide rails on both sides are pressed back to drive the rollers to press back. At this time, the rollers are in rigid contact with the device, which can realize strong rolling. It has the characteristics of a rigid rolling device and a hydraulic rolling device, and has wider adaptability. Suitable for rolling various complex structures.

The technical solution adopted by the present invention to solve the technical problem is a composite rolling device for surface rolling strengthening, which is characterized in that: the device comprises: a hollow piston 1, a reciprocating oil cylinder 2, a trapezoidal guide rail 3, and a sealing ring 4 , clamp 5, guide rail gland 6, spring 7, spring gland 8, flat key 9, roller seat 10, roller 11, angular contact bearing 12, angular contact bearing 13, inner bushing 14, outer bushing 15, angular contact Contact bearing 16 , angular contact bearing 17 , round nut 18 , end cover 19 , guide rail seat 20 , trapezoidal guide rail 21 , tool holder 22 .

A composite rolling device for surface rolling strengthening is characterized in that: a piston is used for fixing, an oil cylinder moves, a guide rail adopts a trapezoidal guide rail, and the angle between the surfaces of the trapezoidal guide rail ranges from 0° to 180°, including 0° and no 180° included.

The beneficial effects of the invention are: a composite rolling device for surface rolling strengthening can be used as a rigid rolling tool or a hydraulic rolling tool, and can be selected according to the rolling requirements, eliminating the need for replacement It saves processing auxiliary time, improves processing efficiency, and reduces processing cost; the device has a simple structure and low manufacturing cost; a composite rolling device for surface rolling strengthening has high rigidity, high adaptability, and high stability. It overcomes the adverse effect of the large error between the actual trajectory and the motion trajectory of the workpiece on the rolling effect, and can meet the different rolling requirements of complex surfaces such as arcs and curved surfaces.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

FIG. 1 is a front view of a composite type rolling device for surface rolling strengthening.

FIG. 2 is a right side view of FIG. 1 .

FIG. 3 is a plan view of FIG. 1 .

FIG. 4 is a bottom view of FIG. 1 .

FIG. 5 is a left side view of FIG. 1 .

FIG. 6 is a cross-sectional view taken along C-C of FIG. 2 .

FIG. 7 is a cross-sectional view taken along D-D of FIG. 3 .

Figure 1. Hollow piston 1, reciprocating oil cylinder 2, trapezoidal guide rail 3, sealing ring 4, clamp 5, guide rail gland 6, spring 7, spring gland 8, flat key 9, roller seat 10, roller 11, angular contact bearing 12, angle Contact bearing 13 , inner bushing 14 , outer bushing 15 , angular contact bearing 16 , angular contact bearing 17 , round nut 18 , end cover 19 , guide rail seat 20 , trapezoidal guide rail 21 , shank 22 .

Detailed ways

In Figure 1, a composite rolling device for surface rolling strengthening is characterized in that: the device includes: a hollow piston 1, a reciprocating oil cylinder 2, a trapezoidal guide rail 3, a sealing ring 4, a clamp 5, a guide rail pressure Cover 6, spring 7, spring press cover 8, flat key 9, roller seat 10, roller 11, angular contact bearing 12, angular contact bearing 13, inner bushing 14, outer bushing 15, angular contact bearing 16, angular contact bearing 17. Round nut 18, end cover 19, guide rail seat 20, trapezoidal guide rail 21, tool handle 22. The hollow piston 1 is fixed with the guide rail seat 20 by screws, the tool handle 22 is fixed with the guide rail seat 20 by screws, the trapezoidal guide rail 3 is fixed with the guide rail gland 6 by screws, the trapezoidal guide rail 21 and the guide rail base 20 are fixed by screws, and the guide rail gland 6 is fixed with the guide rail cover 6. The guide rail seat 20 is fixed by screws. The front end of the hollow piston 1 is installed with a sealing ring 4, which is pressed by the clamp 5 to form a hydraulic cylinder with the reciprocating oil cylinder 2. The hollow piston 1 and the clamp 5 are in interference fit, which avoids the traditional assembly For the damage to the sealing ring 4, the hollow piston 1 is a hollow structure, and the hydraulic oil enters the hydraulic cylinder through the hollow piston 1 to realize the oil supply to the hydraulic cylinder; Reciprocate along the trapezoidal guide rail 3 and the trapezoidal guide rail 21. The reciprocating oil cylinder 2 is pressed by the spring 7. When the oil is not supplied, the reciprocating oil cylinder 2 is pressed back. The top screw is used for tightening, and the roller 11 passes through the roller seat 10 and is sequentially installed with an angular contact bearing 12, an angular contact bearing 13, an inner bushing 14, an outer bushing 15, an angular contact bearing 16, an angular contact bearing 17, and a round nut 18. The angular contact bearing 12 and the angular contact bearing 13 are a pair of face-to-face diagonal contact bearings, and the angular contact bearing 16 and the angular contact bearing 17 are a pair of face-to-face angular contact bearings. The axial dimension meets the installation clearance of two pairs of diagonal contact bearings. The inner ring of angular contact bearing 12, the inner ring of angular contact bearing 13, the inner ring of angular contact bearing 13, the inner ring of angular contact bearing 16, the inner ring of angular contact bearing 16, and the inner ring of angular contact bearing 17 are connected by round nut 18. Press and fix with the roller 11, and press the outer ring of the angular contact bearing 12, the outer ring of the angular contact bearing 13, the outer sleeve 15, the outer ring of the angular contact bearing 16, and the outer ring of the angular contact bearing 17 with the roller seat 10 through the end cover 19. Fixed, the use of two pairs of angular contact bearings improves the rotation accuracy and bearing capacity of the roller when it rotates, ensures the high-speed and stable rotation of the roller under high load, and meets the needs of rolling.

Specific working process:

Step 1: Position the workpiece through the machine tool chuck and the top center of the tail to ensure that the workpiece is coaxial with the center of rotation of the machine tool spindle;

The second step: install the rolling device on the machine tool turret, adjust the height and clamp it, and connect it with the hydraulic station;

The third step: move the rolling device to the workpiece attachment through the machine tool (half the distance formed by the hydraulic cylinder of the rolling device is appropriate);

The fourth step: start the processing program, start the hydraulic station, supply oil to the rolling device, the roller extends out to contact the surface of the workpiece, and starts the rolling work;

Step 5: When the rolling is about to be completed, the hydraulic station is closed first, and the roller retracts under the action of the spring force, and then the processing program is stopped to complete the processing.

Claims (2)

1. The utility model provides a compound rolling press device for surface rolling is reinforceed which characterized in that: the device comprises: the device comprises a hollow piston 1, a reciprocating oil cylinder 2, a trapezoidal guide rail 3, a sealing ring 4, a hoop 5, a guide rail gland 6, a spring 7, a spring gland 8, a flat key 9, a roller seat 10, a roller 11, an angular contact bearing 12, an angular contact bearing 13, an inner shaft sleeve 14, an outer shaft sleeve 15, an angular contact bearing 16, an angular contact bearing 17, a round nut 18, an end cover 19, a guide rail seat 20, a trapezoidal guide rail 21 and a cutter handle 22. The hollow piston 1 is fixed with the guide rail seat 20 through a screw, the knife handle 22 is fixed with the guide rail seat 20 through a screw, the trapezoidal guide rail 3 is fixed with the guide rail gland 6 through a screw, the trapezoidal guide rail 21 is fixed with the guide rail seat 20 through a screw, the guide rail gland 6 is fixed with the guide rail seat 20 through a screw, the front end of the hollow piston 1 is provided with the sealing ring 4, the sealing ring 4 is tightly pressed through the clamp 5 and forms a hydraulic cylinder with the reciprocating oil cylinder 2, the hollow piston 1 and the clamp 5 are in interference fit, the damage to the sealing ring 4 during traditional assembly is avoided, the hollow piston 1 is of a hollow structure, hydraulic oil enters the hydraulic cylinder through the hollow piston 1, and oil supply to the hydraulic cylinder is realized; the two sides of the reciprocating oil cylinder 2 are respectively matched with the trapezoidal guide rail 3 and the trapezoidal guide rail 21 and can reciprocate along the trapezoidal guide rail 3 and the trapezoidal guide rail 21, the reciprocating oil cylinder 2 is pressed by the spring 7, when oil is not supplied, the reciprocating oil cylinder 2 is pressed back, the front end of the reciprocating oil cylinder 2 is in interference fit with the roller seat, the reciprocating oil cylinder is positioned by the flat key 9 and is tightly jacked by adopting jackscrews, the roller 11 penetrates through the roller seat 10 to be sequentially provided with an angular contact bearing 12, an angular contact bearing 13, an inner shaft sleeve 14, an outer shaft sleeve 15, an angular contact bearing 16, an angular contact bearing 17 and a round nut 18, wherein the angular contact bearing 12 and the angular contact bearing 13 are a pair of face-to-face angular contact bearings, the angular contact bearing 16 and the angular contact bearing 17 are a pair of face-to-face angular contact bearings, the axial sizes of the inner shaft sleeve 14 and the outer shaft sleeve 15 are controlled to meet the installation clearance of the two pairs of angular contact bearings, and the inner ring 12 is arranged by the round nut 18, The inner ring of the angular contact bearing 13, the inner shaft sleeve 14, the inner ring of the angular contact bearing 16 and the inner ring of the angular contact bearing 17 are pressed and fixed with the roller 11, the outer ring of the angular contact bearing 12, the outer ring of the angular contact bearing 13, the outer shaft sleeve 15, the outer ring of the angular contact bearing 16 and the outer ring of the angular contact bearing 17 are pressed and fixed with the roller seat 10 through the end cover 19, the rotation precision and the bearing capacity of the roller during rotation are improved by adopting two groups of paired angular contact bearings, high-speed stable rotation of the roller under high load is ensured, and the rolling requirement is met.

2. A composite rolling press apparatus for surface rolling reinforcement according to claim 1, characterized in that: the piston is adopted for fixing, the oil cylinder moves, the guide rail adopts a trapezoidal guide rail, and the included angle range of the trapezoidal guide rail surface is 0-180 degrees, including 0 degrees and excluding 180 degrees.

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