A water jet cutting method for machining small hole oil ring wire oil return hole

Abstract

The present invention discloses a water cutting method for processing the oil return holes of small-hole oil ring steel wires, and relates to the technical field of water cutting small holes in thin steel strips. The water cutting method is realized by the following steps: A. Assembling the positioning cavity, B. Arranging the feeding mechanism, C. Assembling the water cutting assembly, D. Positioning and clamping the steel wire, E. First cutting on the left side, F. Switching to cutting on the right side and depressurizing on the left side, G. Switching to cutting on the left side and depressurizing on the right side, H. Alternating and cyclical uninterrupted cutting. The water cutting method of the present invention can be used to perform alternating and uninterrupted water cutting on the spaced oil return holes of two small-hole oil ring steel wires, and can automatically cut high-precision oil return holes quickly and accurately, and can effectively avoid burrs, thermal deformation and structural changes in the oil return holes, thereby improving processing stability.

Description

Technical Field

[0001] The invention relates to the field of water cutting small holes in thin steel strips, in particular to a water cutting method for machining small hole oil ring steel wire oil return holes. Background Art

[0002] The small-hole oil ring is a one-piece piston ring with relatively advanced technology. It is evenly covered with small-sized oil return holes. The traditional processing methods for the oil return holes of small-hole oil ring steel wires are die stamping and laser cutting. The die stamping and material removal method is prone to burrs and leakage in the oil return holes due to die wear or damage during mass production, which will seriously affect the quality of the material. The laser cutting method is prone to material deformation and structural changes due to the high temperature generated, which in turn affects the mechanical properties of the material. In view of the shortcomings of the existing processing methods, it is necessary to design a new method for processing the oil return holes of small-hole oil rings. It is necessary to effectively avoid burrs or leakage in the oil return holes, and meet the requirements of no thermal deformation and structural changes, and also meet the requirements of processing stability. Summary of the Invention

[0003] The present invention addresses the shortcomings of existing technologies by providing a waterjet cutting method for machining oil return holes in small-bore oil ring wires. This method enables alternating and uninterrupted waterjet cutting of the spaced oil return holes of two small-bore oil ring wires. This method rapidly and accurately cuts high-precision oil return holes automatically, effectively preventing burrs, thermal deformation, and structural changes in the oil return holes, and improving processing stability.

[0004] The purpose of the present invention can be achieved by the following technical measures:

[0005] A water jet cutting method for machining a small-hole oil ring wire oil return hole of the present invention is achieved by the following steps:

[0006] A. Assembling the Positioning Cavity: Two identical left and right support and clamping devices are arranged side by side on the workbench of the water jet cutting machine. Each of the support and clamping devices consists of a support pad placed on the workbench of the water jet cutting machine and a pair of hydraulic translation-type clamping blocks clamped on the left and right sides of the support pad. The top surface of the support pad and the inner surface of the upper middle portion of the hydraulic translation-type clamping block together form a positioning cavity for clamping the small-hole oil ring wire. The top surface of the boss of the support pad matches the bottom surface of the groove of the small-hole oil ring wire, the inner surface of the upper middle portion of the hydraulic translation-type clamping block matches the outer surface of the small-hole oil ring wire, and the inner surface of the lower middle portion of the removable clamping block matches the outer surface of the support pad. The support pad is provided with a chip removal hole that runs through from the top to the bottom surface.

[0007] B. Arrangement of feeding mechanism: A feeding mechanism is arranged at the front end of each of the two supporting and clamping devices; the feeding mechanism is composed of a set of upper and lower feeding guide wheels and a servo motor connected to the upper and lower feeding guide wheels;

[0008] C. Assemble the water jet cutting components: Connect the water jet cutting head I on the left and the water jet cutting head II on the right to the outlet of the electromagnetic reversing valve in parallel through pipes, and connect the inlet of the electromagnetic reversing valve to the cutting fluid pump station through pipes;

[0009] D. Positioning and clamping wires: Move the two small-hole oil ring wires passing between the upper and lower feed guide wheels of the left and right feeding mechanisms forward, allowing the front ends of the small-hole oil ring wires to pass through the positioning cavities on the corresponding sides and be clamped and fixed. That is, the top surface of the boss of the support pad is supported on the bottom surface of the groove of the small-hole oil ring wire. The control device activates the hydraulic translation type clamping block to translate inward relative to each other, and then clamps and fixes the outer side surfaces of the small-hole oil ring wire and the outer side surfaces of the support pad at the same time.

[0010] E. First cutting on the left side: The control device activates the electromagnetic reversing valve to open the pipeline connected to the water cutting head I on the left side. The high-pressure aqueous solution provided by the cutting fluid pump station is transmitted to the water cutting head I, and the small hole oil ring steel wire on the left side directly below is cut for the first time. The water cutting head I moves backward along the length of the steel wire while cutting. The backward movement distance of the water cutting head I matches the length of the oil return hole of the small hole oil ring steel wire on the left side. After the cutting is completed, the water cutting head I returns to the starting cutting position;

[0011] F. Switch to right-side cutting and left-side pressure relief: When the left-side cutting is completed, the control device starts the electromagnetic reversing valve to switch and open the pipeline connected to the water cutting head II on the right side. The high-pressure aqueous solution provided by the cutting fluid pump station is transmitted to the water cutting head II to cut the small hole oil ring steel wire on the right side directly below. The water cutting head II moves backward along the length of the steel wire while cutting. The distance that the water cutting head II moves backward matches the length of the oil return hole of the small hole oil ring steel wire on the right side. After the cutting is completed, the water cutting head II returns to the starting cutting position; at the same time, the left side starts to relieve pressure, feed, and clamp. Fixing - that is, first the control device starts the hydraulic translation type clamping block on the left and moves it outwards relatively at the same time, loosening the small hole oil ring wire and the support pad; then the servo motor in the left feeding mechanism drives the upper and lower feeding guide wheels on the left to rotate, driving the small hole oil ring wire on the left to move forward by a hole spacing, that is, the starting cutting position of the next oil return hole to be cut is just below the water cutting head I at this time; then the control device starts the hydraulic translation type clamping block again and moves it inwards relatively at the same time, clamping and fixing the outer side surface of the small hole oil ring wire and the outer side surface of the support pad on the left;

[0012] G. Switch to left-side cutting and right-side pressure relief: When the right-side cutting is completed, the control device starts the electromagnetic reversing valve to switch and open the pipeline connected to the water cutting head I on the left. The high-pressure aqueous solution provided by the cutting fluid pump station is transmitted to the water cutting head I to cut the small hole oil ring steel wire on the left side directly below. The water cutting head I moves backward along the length of the steel wire while cutting. The distance the water cutting head I moves backward matches the length of the oil return hole of the small hole oil ring steel wire on the left. After the cutting is completed, the water cutting head I returns to the starting cutting position; at the same time, the right side starts to relieve pressure, feed, and clamp. Fixing - that is, first the control device starts the hydraulic translation type clamping block on the right and moves it outward relatively at the same time, loosening the small hole oil ring wire and the support pad; then the servo motor in the right feeding mechanism drives the upper and lower feeding guide wheels on the right to rotate, driving the small hole oil ring wire on the right to move forward by a hole spacing, that is, the starting cutting position of the next oil return hole to be cut is just below the water cutting head II at this time; then the control device starts the hydraulic translation type clamping block again and moves it inward relatively at the same time, clamping and fixing the outer side surface of the small hole oil ring wire and the outer side surface of the support pad on the right;

[0013] H. Alternating cycle uninterrupted cutting: Repeat steps F to G above in sequence to quickly and accurately perform alternating cycle uninterrupted automatic cutting on the interval oil return holes of the two small-hole oil ring wires on the left and right, and efficiently process oil return holes with high precision, no burrs, and stable performance.

[0014] The chip removal hole in the present invention is a stepped inner cavity formed by connecting two rectangular inner cavities with a smaller upper cavity and a larger lower cavity. The width and length of the upper cavity of the chip removal hole are not less than the width and length of the oil return hole of the small-hole oil ring steel wire.

[0015] The design principles of the present invention are as follows:

[0016] Since the present invention is provided with two sets of identical left and right feeding mechanisms, support and clamping devices, and corresponding matching left water cutting head I and right water cutting head II, and water cutting head I and water cutting head II are connected in parallel at the outlet end of the electromagnetic reversing valve, and the inlet end of the electromagnetic reversing valve is connected to the cutting liquid pump station through a pipeline, the high-pressure aqueous solution provided by the cutting liquid pump station can be alternately transmitted to the water cutting head I and water cutting head II with the help of the switching of the electromagnetic reversing valve. In this way, the spaced oil return holes of the two small-hole oil ring steel wires on the left and right, which are moved forward one hole spacing each time by the feeding mechanism and positioned and clamped by the support and clamping device, can be alternately and uninterruptedly water-cut. High-precision oil return holes can be automatically cut quickly and accurately, and burrs, thermal deformation and structural changes in the oil return holes can be effectively avoided, thereby improving processing stability.

[0017] The beneficial technical effects of the present invention are as follows:

[0018] The water cutting method of the present invention can be used to perform alternating and uninterrupted water cutting processing on the interval-type oil return holes of two small-hole oil ring steel wires, and can automatically cut high-precision oil return holes quickly and accurately, and can effectively avoid burrs, thermal deformation and structural changes in the oil return holes, thereby improving processing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the processing of the present invention.

[0020] Figure 2 yes Figure 1 MM section view in.

[0021] Figure 3 It is a structural diagram of the small hole oil ring wire.

[0022] Explanation of the part numbers in the figure: 1. Servo motor, 2. Small-hole oil ring wire, 2-1. Oil return hole, 3. Upper and lower feed guide wheels, 4. Hydraulic translation clamping block, 5. Support pad, 5-1. Chip removal hole; 6. Water cutting head I, 6', Water cutting head II, 7. Solenoid reversing valve, 8. Cutting fluid pump station. Implementation Method

[0023] The present invention is further described below with reference to the accompanying drawings:

[0024] like Figures 1 to 3 As shown, a water jet cutting method for machining a small-hole oil ring wire oil return hole of the present invention is achieved by the following steps:

[0025] A. Assembling the positioning cavity: Two sets of identical left and right support clamping devices are arranged side by side on the workbench of the water jet cutting machine; the support clamping devices are composed of a support pad 5 placed on the workbench of the water jet cutting machine and a pair of hydraulic translation type clamping blocks 4 clamped on the left and right sides of the support pad. The top surface of the support pad 5 and the inner surface of the upper middle portion of the hydraulic translation type clamping block 4 together form a positioning cavity for clamping the small-hole oil ring wire 2; the top surface of the boss of the support pad 5 matches the bottom surface of the groove of the small-hole oil ring wire 2, the inner surface of the upper middle portion of the hydraulic translation type clamping block 4 matches the outer surface of the small-hole oil ring wire 2, and the inner surface of the lower middle portion of the removable clamping block 4 matches the outer surface of the support pad 5; a chip removal hole 5-1 is opened on the support pad 5 from the top surface to the bottom surface;

[0026] B. Arrangement of feeding mechanism: A feeding mechanism is arranged at the front end of each of the two supporting and clamping devices; each feeding mechanism is composed of a set of upper and lower feeding guide wheels 3 and a servo motor 1 connected to the upper and lower feeding guide wheels;

[0027] C. Assemble the water cutting assembly: Connect the water cutting head I 6 on the left and the water cutting head II 6' on the right in parallel to the outlet of the electromagnetic reversing valve 7 through pipes, and connect the inlet of the electromagnetic reversing valve 7 to the cutting fluid pump station 8 through pipes;

[0028] D. Positioning and clamping the wires: The two small-bore oil ring wires 2 passing between the upper and lower feed guide wheels 3 of the left and right feeding mechanisms are moved forward, so that the front ends of the small-bore oil ring wires 2 pass through the positioning cavities on the corresponding sides and are clamped and fixed. That is, the top surface of the boss of the support pad 5 is supported on the bottom surface of the groove of the small-bore oil ring wire 2. The control device activates the hydraulic translation type clamping block 4 to translate inwardly and simultaneously clamp and fix the outer side surfaces of the small-bore oil ring wire 2 and the outer side surfaces of the support pad 5.

[0029] E. First cutting on the left side: The control device activates the electromagnetic reversing valve 7 to open the pipeline connected to the water cutting head I6 on the left side. The high-pressure aqueous solution provided by the cutting liquid pump station 8 is transmitted to the water cutting head I6, and the first cutting is performed on the left small hole oil ring steel wire 2 directly below. The water cutting head I6 moves backward along the length of the steel wire while cutting. The distance the water cutting head I6 moves backward matches the length of the oil return hole 2-1 of the small hole oil ring steel wire 2 on the left side. After the cutting is completed, the water cutting head I6 returns to the starting cutting position;

[0030] F. Switch to right-side cutting and left-side pressure relief: When the left-side cutting is completed, the control device starts the electromagnetic reversing valve 7 to switch and open the pipeline connected to the water cutting head II 6' on the right side. The high-pressure aqueous solution provided by the cutting liquid pump station 8 is transmitted to the water cutting head II 6' to cut the small hole oil ring steel wire 2 on the right side directly below. The water cutting head II 6' moves backward along the length of the steel wire while cutting. The distance the water cutting head II 6' moves backward matches the length of the oil return hole 2-1 of the small hole oil ring steel wire 2 on the right side. After the cutting is completed, the water cutting head II 6' returns to the starting cutting position; at the same time, the left side starts to relieve pressure, feed, Clamping and fixing - that is, first the control device starts the hydraulic translation type clamping block 4 on the left and moves it relatively outward at the same time, loosening the small hole oil ring wire 2 and the support pad 5; then the servo motor 1 in the left feeding mechanism drives the upper and lower feeding guide wheels 3 on the left to rotate, driving the small hole oil ring wire 2 on the left to step forward by a distance of the hole spacing, that is, the starting cutting position of the next oil return hole 2-1 to be cut is just below the water cutting head I 6 at this time; then the control device starts the hydraulic translation type clamping block 4 again and moves it relatively inward, while clamping and fixing the outer side surface of the small hole oil ring wire 2 on the left and the outer side surface of the support pad 5;

[0031] G. Switch to left-side cutting and right-side pressure relief: When the right-side cutting is completed, the control device starts the electromagnetic reversing valve 7 to switch and open the pipeline connected to the water cutting head Ⅰ6 on the left side. The high-pressure aqueous solution provided by the cutting liquid pump station 8 is transmitted to the water cutting head Ⅰ6 to cut the left small hole oil ring steel wire 2 just below. The water cutting head Ⅰ6 moves backward along the length of the steel wire while cutting. The distance the water cutting head Ⅰ6 moves backward matches the length of the oil return hole 2-1 of the small hole oil ring steel wire 2 on the left side. After the cutting is completed, the water cutting head Ⅰ6 returns to the starting cutting position; at the same time, the right side starts to relieve pressure, feed, and clamp. Fixed - that is, first the control device starts the hydraulic translation type clamping block 4 on the right and moves it relatively outward at the same time, loosening the small hole oil ring steel wire 2 and the support pad 5; then the servo motor 1 in the right feeding mechanism drives the upper and lower feeding guide wheels 3 on the right to rotate, driving the small hole oil ring steel wire 2 on the right to step forward by a distance of a hole spacing, that is, the starting cutting position of the next return oil hole 2-1 to be cut is just below the water cutting head II 6' at this time; then the control device starts the hydraulic translation type clamping block 4 again and moves it relatively inward, while clamping and fixing the outer side surface of the small hole oil ring steel wire 2 on the right and the outer side surface of the support pad 5;

[0032] H. Alternating cycle uninterrupted cutting: Repeat steps F to G above in sequence to quickly and accurately perform alternating cycle uninterrupted automatic cutting on the interval oil return holes of the two small-hole oil ring wires on the left and right, and efficiently process oil return holes with high precision, no burrs, and stable performance.

[0033] The chip removal hole 5-1 in the present invention is a stepped inner cavity formed by connecting two rectangular inner cavities with a smaller upper cavity and a larger lower cavity. The width and length of the upper cavity of the chip removal hole 5-1 are not less than the width and length of the oil return hole 2-1 of the small-hole oil ring wire 2.

Claims

1. A water jet cutting method for machining a small-hole oil ring wire oil return hole, characterized in that: The water cutting method is achieved by the following steps: A. Assembling the positioning cavity: two sets of identical support clamping devices are arranged side by side on the workbench of the water jet cutting machine; the support clamping devices are composed of a support pad (5) placed on the workbench of the water jet cutting machine, and a pair of hydraulic translation type clamping blocks (4) clamped on the left and right sides of the support pad. The top surface of the support pad (5) and the inner surface of the middle and upper part of the hydraulic translation type clamping block (4) are combined to form a positioning cavity for clamping the small hole oil ring wire (2); the top surface of the boss of the support pad (5) matches the bottom surface of the groove of the small hole oil ring wire (2), the inner surface of the middle and upper part of the hydraulic translation type clamping block (4) matches the outer surface of the small hole oil ring wire (2), and the inner surface of the middle and lower part of the removable clamping block (4) matches the outer surface of the support pad (5); a chip removal hole (5-1) is opened on the support pad (5) and passes through from the top surface to the bottom surface; B. Arrangement of feeding mechanism: A feeding mechanism is arranged at the front end of each of the two supporting and clamping devices; the feeding mechanism is composed of a set of upper and lower feeding guide wheels (3) and a servo motor (1) connected to the upper and lower feeding guide wheels; C. Assemble the water cutting assembly: connect the water cutting head I (6) on the left and the water cutting head II (6') on the right in parallel to the outlet of the electromagnetic reversing valve (7) through a pipeline, and connect the inlet of the electromagnetic reversing valve (7) to the cutting fluid pump station (8) through a pipeline; D. Positioning and clamping steel wires: two small-hole oil ring steel wires (2) passing through the upper and lower feeding guide wheels (3) of the left and right feeding mechanisms are moved forward, so that the front ends of the small-hole oil ring steel wires (2) pass through the positioning cavities on the corresponding sides and are clamped and fixed - that is, the top surface of the boss of the support pad (5) is supported on the bottom surface of the groove of the small-hole oil ring steel wire (2), and the control device starts the hydraulic translation type clamping block (4) to move relatively inward and simultaneously clamp and fix the outer side surface of the small-hole oil ring steel wire (2) and the outer side surface of the support pad (5); E. First cutting on the left side: The control device starts the electromagnetic reversing valve (7) to open the pipeline connected to the water cutting head I (6) on the left side. The high-pressure aqueous solution provided by the cutting liquid pump station (8) is transmitted to the water cutting head I (6), and the small hole oil ring steel wire (2) on the left side directly below is cut for the first time. The water cutting head I (6) moves backward along the length of the steel wire while cutting. The distance that the water cutting head I (6) moves backward matches the length of the oil return hole (2-1) of the small hole oil ring steel wire (2) on the left side. After the cutting is completed, the water cutting head I (6) returns to the starting cutting position; F. Switch to right-side cutting and left-side pressure relief: When the left-side cutting is completed, the control device starts the electromagnetic reversing valve (7) to switch and open the pipeline connected to the water cutting head II (6') on the right side, and the high-pressure aqueous solution provided by the cutting liquid pump station (8) is transmitted to the water cutting head II (6') to cut the small hole oil ring steel wire (2) on the right side directly below. The water cutting head II (6') moves backward along the length of the steel wire while cutting. The distance that the water cutting head II (6') moves backward matches the length of the oil return hole (2-1) of the small hole oil ring steel wire (2) on the right side, and after the cutting is completed, the water cutting head II (6') returns to the starting cutting position; at the same time, the left side starts to relieve pressure, feed, Clamping and fixing - that is, first the control device starts the hydraulic translation type clamping block (4) on the left side and moves it relatively outward at the same time, loosening the small hole oil ring wire (2) and the support pad (5); then the servo motor (1) in the left feeding mechanism drives the upper and lower feeding guide wheels (3) on the left side to rotate, driving the small hole oil ring wire (2) on the left side to move forward by a distance of the hole spacing, that is, the starting cutting position of the next oil return hole (2-1) to be cut is just below the water cutting head I (6) at this time; then the control device starts the hydraulic translation type clamping block (4) again and moves it relatively inward, while clamping and fixing the outer side surface of the small hole oil ring wire (2) on the left side and the outer side surface of the support pad (5); G. Switching to cutting on the left and depressurizing on the right: When the cutting on the right is completed, the control device starts the electromagnetic reversing valve (7) to switch and open the pipeline connected to the water cutting head I (6) on the left, and the high-pressure aqueous solution provided by the cutting liquid pump station (8) is transmitted to the water cutting head I (6) to cut the left small hole oil ring steel wire (2) directly below. The water cutting head I (6) moves backward along the length of the steel wire while cutting. The distance that the water cutting head I (6) moves backward matches the length of the oil return hole (2-1) of the small hole oil ring steel wire (2) on the left, and after the cutting is completed, the water cutting head I (6) returns to the starting cutting position; at the same time, the right side starts to depressurize, feed, and clamp. Fixed - that is, first the control device starts the hydraulic translation type clamping block (4) on the right side and moves it relatively outward at the same time, loosening the small hole oil ring wire (2) and the support pad (5); then the servo motor (1) in the right feeding mechanism drives the upper and lower feeding guide wheels (3) on the right side to rotate, driving the small hole oil ring wire (2) on the right side to move forward by a distance of a hole spacing, that is, the starting cutting position of the next oil return hole (2-1) to be cut is just below the water cutting head II (6') at this time; then the control device starts the hydraulic translation type clamping block (4) again and moves it relatively inward, while clamping and fixing the outer side surface of the small hole oil ring wire (2) on the right side and the outer side surface of the support pad (5); H. Alternating cycle uninterrupted cutting: Repeat steps F to G above in sequence to quickly and accurately perform alternating cycle uninterrupted automatic cutting on the interval oil return holes of the two small-hole oil ring wires on the left and right, and efficiently process oil return holes with high precision, no burrs, and stable performance.

2. The water jet cutting method for machining the oil return hole of a small-hole oil ring steel wire according to claim 1, characterized in that: The chip removal hole (5-1) is a stepped inner cavity formed by connecting two rectangular inner cavities, one smaller at the top and the other larger at the bottom. The width and length of the upper cavity of the chip removal hole (5-1) are not less than the width and length of the oil return hole (2-1) of the small-hole oil ring steel wire (2).

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