Superfinishing machine for machining fuel injection pump roller

Abstract

The invention belongs to the technical field of part machining, and particularly relates to a super-finishing machine for machining fuel injection pump rollers, which comprises a workbench and two super-finishing guide rollers mounted on the workbench, a supporting plate is fixed on the workbench, a sliding rail is fixedly mounted on the supporting plate, an oilstone frame is slidably connected to the sliding rail, and the oilstone frame is fixedly connected with the workbench. A plurality of oilstone clamping mechanisms arranged at equal intervals are fixed to the oilstone frame, and a reciprocating mechanism used for driving the oilstone frame to swing is installed on the supporting plate. The oilstone clamping mechanism comprises a cylinder barrel fixed to the oilstone frame, an annular groove is formed in the cylinder barrel, a piston plate is arranged in the annular groove in a sealed sliding mode, and an oilstone clamp is fixed to the bottom of the piston plate. The pressing degree of each oilstone and the workpiece can be the same, so that the accurate grinding effect of each part of the workpiece is uniform and consistent, the oilstones are positioned through liquid-solid conversion of the electrorheological fluid, the stability is better, the accurate grinding effect is ensured, and the service life of the oilstones is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of parts processing, and in particular relates to a superfinishing machine for processing a fuel injection pump roller. Background Art

[0002] The superfinishing machine presses the oilstone against the rotating workpiece at a relatively low pressure to form a surface contact state. At the same time, the oilstone makes a relatively high-frequency axial vibration, which can greatly improve the roughness in a short time.

[0003] There are still deficiencies in the prior art, and the deficiencies are as follows: Multiple oilstones are pressed and positioned by different hydraulic or pneumatic cylinders. However, in actual work, due to the wear degree of each oilstone, when the oilstone is fed and compensated by the hydraulic or pneumatic cylinder, errors are likely to occur, resulting in inconsistent pressures of each hydraulic or pneumatic cylinder, which causes different contact pressures between each oilstone and the workpiece, and it is impossible to ensure uniform fine grinding effects on all parts of the workpiece. The oilstone is pressed against the workpiece by hydraulic or pneumatic pressure. However, since liquid and gas will expand and contract to a certain extent when under pressure, the oilstone is prone to jumping when in contact with the workpiece due to the expansion and contraction, which affects the grinding accuracy and shortens the service life of the oilstone. During superfinishing, if the oilstone pressure is too large, the groove curvature will be too small and the groove sides will not be superfinished well. At this time, if the pressure remains unchanged, the swing amplitude of the oilstone rack must be increased. If the swing amplitude of the oilstone rack is too large, the groove curvature will be too large and the groove bottom will not be superfinished well, resulting in defects. However, the existing superfinishing machine cannot adjust the swing amplitude of the oilstone rack, or it needs to be adjusted during machine adjustment, and the adjustment operation is inconvenient. Summary of the invention

[0004] The purpose of the present invention is to provide a superfinishing machine for processing the roller of an injection pump in order to solve the problems of poor uniformity of fine grinding, vibration of the oil stone and inconvenience in adjusting the swing amplitude of the oil stone rack mentioned in the above background technology.

[0005] To achieve the above object, the present invention adopts the following technical scheme: a superfinishing machine for processing a fuel injection pump roller, comprising a workbench and two superfinishing guide rollers mounted on the workbench, a support plate fixed to the workbench, a slide rail fixed to the support plate, an oilstone rack slidably connected to the slide rail, a plurality of oilstone clamping mechanisms arranged equidistantly are fixed to the oilstone rack, and a reciprocating mechanism for driving the oilstone rack to swing is mounted on the support plate; The oilstone clamping mechanism comprises a cylinder fixed on an oilstone rack, an annular groove is arranged in the cylinder, a piston plate is sealingly slidably arranged in the annular groove, an oilstone clamp is fixed on the bottom of the piston plate, an oilstone is fixed on the oilstone clamp, a pressure cylinder is fixed on the oilstone rack, a hydraulic cylinder is fixedly mounted on the pressure cylinder, a sealing plate is connected to the output end of the hydraulic cylinder, the sealing plate is sealingly slidably fitted in the pressure cylinder, a multi-way tube is connected to the output end of the pressure cylinder, the output end of the multi-way tube is communicated with each cylinder, and the pressure cylinder and the cylinder are filled with electrorheological fluid; The support plate is provided with an energizing mechanism, and the electrorheological fluid is connected to a power supply through the energizing mechanism. After the electrorheological fluid is energized, the electrorheological fluid is converted from a liquid fluid to a solid state, thereby achieving the positioning of the oilstone.

[0006] Furthermore, a limiting groove is provided at the bottom of the cylinder, and the oilstone penetrates and fits in the limiting groove.

[0007] Furthermore, the reciprocating mechanism includes a motor mounted on a support plate, a rotating shaft is connected to the output shaft of the motor, a rotating wheel is fixed to the rotating shaft, a transmission rod I is fixed to the rotating wheel, the end of the transmission rod I is rotatably connected to the transmission rod II, the end of the transmission rod II is rotatably connected to a push rod, the push rod is rotatably connected to the oilstone rack, an adjustment mechanism is provided between the transmission rod I and the transmission rod II, and the adjustment mechanism is used to change the size of the angle between the transmission rod I and the transmission rod II.

[0008] Furthermore, the adjustment mechanism is a telescopic rod rotatably mounted on the transmission rod I, and the output end of the telescopic rod is rotatably connected to the transmission rod II.

[0009] Furthermore, the power-on mechanism includes a box body fixed on the side wall of the support plate, the rotating shaft passes through the box body, a conductive ring is installed on the inner wall of the box body, the conductive ring is electrically connected to the electrorheological fluid, and a power-on ball matching the conductive ring is arranged in the box body, the power-on ball is electrically connected to the power supply, and when the conductive ring contacts the power-on ball, the electrorheological fluid is energized.

[0010] Furthermore, a fixing rod and a sliding sleeve are also provided in the box body, the fixing rod is fixedly connected to the rotating shaft, the sliding sleeve is slidably sleeved on the fixing rod, and the power receiving ball is arranged on the sliding sleeve.

[0011] Furthermore, a slot is provided at the end of the sliding sleeve, a universal bearing is fixedly installed in the slot, and the power receiving ball is installed in the universal bearing.

[0012] Furthermore, a feeding plate is fixed on the workbench, the feeding plate is located at the input end of the super-precision guide roller, and the angle between the feeding plate and the horizontal plane is 30°.

[0013] Furthermore, a pressure sensor is installed in the cylinder.

[0014] The present invention has the following advantages: 1. The present invention sets a pressure cylinder and a hydraulic cylinder, and the sealing plate is pushed to move in the pressure cylinder by the hydraulic cylinder. Since each cylinder is connected to the pressure cylinder, each oil stone can be pushed downward by hydraulic means for compensation. Compared with the prior art, the hydraulic pressure in each cylinder is consistent, so that the degree of compression between each oil stone and the workpiece is the same, thereby ensuring uniform and consistent fine grinding effect on various parts of the workpiece.

[0015] 2. The present invention sets an electrorheological fluid. When the power-on mechanism is in the disconnected state, the electrorheological fluid is in a liquid state without the action of an electric field. The oilstone can be moved downward by hydraulic control for compensation. After the compensation is completed, the electrorheological fluid is connected to the circuit. At this time, the electrorheological fluid undergoes a liquid-solid transformation, thereby realizing the positioning of the piston plate and the oilstone. Compared with the prior art, the oilstone is pressed and positioned by air pressure or hydraulic pressure. The present invention has the advantage of better stability. After positioning, the oilstone is not easy to jump due to the problem of expansion and contraction of gas and liquid. While ensuring the fine grinding effect, it also extends the service life of the oilstone and improves the processing stability. In addition, by setting an energizing mechanism to control the on and off state of the magnetic fluid, the rotation of the shaft is used as the driving force, so that the electrorheological fluid automatically undergoes a liquid-solid transformation without manual operation, which is beneficial to improving work efficiency. The positioning and reciprocating swing of the oilstone are carried out synchronously and closely.

[0016] 3. The present invention is provided with a reciprocating mechanism. When the motor is working, it can drive the transmission rod I and the transmission rod II to rotate, and then the oilstone rack is pushed to swing back and forth along the slide rail through the push rod to achieve fine processing of the workpiece; Moreover, the angle between the transmission rod I and the transmission rod II can be changed through the adjustment mechanism, thereby realizing the adjustment and change of the reciprocating swing amplitude of the oilstone rack. The adjustment work is convenient and can be adjusted synchronously during the fine processing to ensure the continuity of the processing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a superfinishing machine for processing a fuel injection pump roller provided by the present invention; Figure 2 It is a side structural schematic diagram of a superfinishing machine for processing a fuel injection pump roller provided by the present invention; Figure 3 It is a schematic diagram of the internal structure of a cylinder barrel in a superfinishing machine for processing a fuel injection pump roller provided by the present invention; Figure 4 It is a schematic diagram of the internal structure of a pressure cylinder in a superfinishing machine for processing a fuel injection pump roller provided by the present invention; Figure 5 yes Figure 1 Enlarged view of point A in the middle; Figure 6 The present invention is a schematic diagram of the internal structure of a box body in a superfinishing machine for processing a fuel injection pump roller.

[0018] In the figure, 1 workbench, 2 super precision guide roller, 3 support plate, 4 slide rail, 5 oilstone rack, 6 cylinder barrel, 7 annular groove, 8 piston plate, 9 oilstone clamp, 10 oilstone, 11 pressurizing cylinder, 12 hydraulic cylinder, 13 sealing plate, 14 multi-way pipe, 15 electrorheological fluid, 16 limit groove, 17 motor, 18 rotating shaft, 19 rotating wheel, 20 transmission rod I, 21 transmission rod II, 22 push rod, 23 telescopic rod, 24 box body, 25 conductive ring, 26 connecting ball, 27 fixed rod, 28 sliding sleeve, 29 universal bearing, 30 feeding plate, 31 pressure sensor. DETAILED DESCRIPTION

[0019] See attached Figure 1-2 A superfinishing machine for processing a fuel injection pump roller comprises a workbench 1 and two superfinishing guide rollers 2 mounted on the workbench 1, a feeding plate 30 is fixed on the workbench 1, the feeding plate 30 is located at the input end of the superfinishing guide roller 2, and the angle between the feeding plate 30 and the horizontal plane is 30°, the inclined feeding plate 30 is convenient for feeding the fuel injection pump roller to be processed to the two superfinishing guide rollers 2, a supporting plate 3 is fixed on the workbench 1, a slide rail 4 is fixedly mounted on the supporting plate 3, an oilstone rack 5 is slidably connected to the slide rail 4, a plurality of equidistantly arranged oilstone clamping mechanisms are fixed on the oilstone rack 5, and a reciprocating mechanism for driving the oilstone rack 5 to swing is mounted on the supporting plate 3.

[0020] See attached Figure 3-4The oilstone clamping mechanism includes a cylinder 6 fixed on the oilstone frame 5, an annular groove 7 is provided in the cylinder 6, a piston plate 8 is sealed and slid in the annular groove 7, an oilstone clamp 9 is fixed to the bottom of the piston plate 8, an oilstone 10 is fixed on the oilstone clamp 9, a pressurizing cylinder 11 is fixed on the oilstone frame 5, a hydraulic cylinder 12 is fixedly installed on the pressurizing cylinder 11, the output end of the hydraulic cylinder 12 is connected to a sealing plate 13, the sealing plate 13 is sealingly slidably fitted in the pressurizing cylinder 11, the output end of the pressurizing cylinder 11 is connected to a multi-way tube 14, the output end of the multi-way tube 14 is connected to each cylinder 6, the pressurizing cylinder 11 and the cylinder 6 are filled with an electrorheological fluid 15, and the electrorheological fluid 15 is composed of The fluid formed by the mixture of dielectric particles and insulating liquid appears liquid in the absence of an electric field. Under the action of an external electric field, the solid particles in the electrorheological fluid obtain the induction effect of the electric field, thereby changing from a liquid state to a solid state. When it is necessary to adjust the feed compensation of the oilstone 10, the sealing plate 13 is pushed to move in the pressurizing cylinder 11 by the hydraulic cylinder 12. Since each cylinder 6 is connected to the pressurizing cylinder 11, each oilstone 10 can be pushed downward by hydraulic means for compensation. Compared with the prior art, the hydraulic pressure in each cylinder 6 is consistent, so that the degree of compression between each oilstone 10 and the workpiece is the same, thereby ensuring that the fine grinding effect on various parts of the workpiece is uniform.

[0021] A pressure sensor 31 is installed in the cylinder 6. Since the hydraulic pressure of the electrorheological fluid 15 at various locations in the cylinder 6 is uniform, the pressure between the oilstone 10 and the workpiece surface can be quickly read through the pressure sensor 31, which is convenient for the feed compensation adjustment of the oilstone.

[0022] The support plate 3 is provided with an energizing mechanism, and the electrorheological fluid 15 is connected to the power supply through the energizing mechanism. The electrorheological fluid 15 is in liquid state in the absence of an electric field, and can be compensated by hydraulically controlling the downward movement of the oilstone. After the compensation is completed, the electrorheological fluid 15 is connected to the circuit, and the electrorheological fluid 15 undergoes a liquid-solid transformation, thereby realizing the positioning of the piston plate 8 and the oilstone 10. Compared with the prior art, the method of pressing and positioning the oilstone by air pressure or hydraulic pressure has the advantage of better stability. After positioning, the oilstone 10 is not prone to jumping due to the expansion and contraction problem of gas and liquid. While ensuring the fine grinding effect, it also extends the service life of the oilstone 10 and improves the processing stability.

[0023] A limiting groove 16 is provided at the bottom of the cylinder 6, and the oilstone 10 is inserted into the limiting groove 16. The limiting groove 16 can laterally position the oilstone 10 when the oilstone 10 is inserted into the cylinder 6 to prevent the clamping position of the oilstone 10 from being offset.

[0024] See attached Figure 5The reciprocating mechanism includes a motor 17 mounted on the support plate 3, a rotating shaft 18 is connected to the output shaft of the motor 17, a rotating wheel 19 is fixed to the rotating shaft 18, a transmission rod Ⅰ20 is fixed to the rotating wheel 19, the end of the transmission rod Ⅰ20 is rotatably connected to the transmission rod Ⅱ21, the end of the transmission rod Ⅱ21 is rotatably connected to the push rod 22, the push rod 22 is rotatably connected to the oilstone rack 5, an adjustment mechanism is arranged between the transmission rod Ⅰ20 and the transmission rod Ⅱ21, the adjustment mechanism is used to change the size of the angle between the transmission rod Ⅰ20 and the transmission rod Ⅱ21, when the motor 17 is working, it can drive the transmission rod Ⅰ20 and the transmission rod Ⅱ21 to rotate, and then the oilstone rack 5 is pushed to swing back and forth along the slide rail 4 through the push rod 22, so as to realize the fine processing of the workpiece.

[0025] The adjusting mechanism is a telescopic rod 23 rotatably mounted on the transmission rod Ⅰ20, and the output end of the telescopic rod 23 is rotatably connected to the transmission rod Ⅱ21. By adjusting the length of the telescopic rod 23, the size of the angle between the transmission rod Ⅰ20 and the transmission rod Ⅱ21 can be changed, thereby realizing the adjustment and change of the reciprocating swing amplitude of the oilstone rack 5. The adjustment work is convenient, and synchronous adjustment can be performed during the fine processing process to ensure the continuity of the processing work.

[0026] See attached Figure 6 The power supply mechanism includes a box body 24 fixed on the side wall of the support plate 3, the rotating shaft 18 passes through the box body 24, a conductive ring 25 is installed on the inner wall of the box body 24, the conductive ring 25 is electrically connected to the electrorheological fluid 15, a power ball 26 matching the conductive ring 25 is arranged in the box body 24, the power ball 26 is electrically connected to the power supply, and a fixed rod 27 and a sliding sleeve 28 are also arranged in the box body 24, the fixed rod 27 is fixedly connected to the rotating shaft 18, the sliding sleeve 28 is slidably sleeved on the fixed rod 27, and the power ball 26 is arranged on the sliding sleeve 28 It should be noted that the fixing rod 27 and the sliding sleeve 28 are also provided with a spring. When the spring is in a natural state, the charging ball 26 does not contact the conductive ring 25. When the rotating shaft 18 rotates, under the action of centrifugal force, the conductive ring 25 contacts the charging ball 26, so that the electrorheological fluid 15 is energized. With the rotation of the rotating shaft 18 as the driving force, the electrorheological fluid 15 automatically undergoes a liquid-solid transformation, without the need for manual operation, which is conducive to improving work efficiency. The positioning and reciprocating swinging of the oilstone 10 are carried out synchronously and closely matched.

[0027] A slot is provided at the end of the sleeve 28, and a universal bearing 29 is fixedly installed in the slot. The power receiving ball 26 is installed in the universal bearing 29. The setting of the universal bearing 29 allows the power receiving ball 26 to roll freely on the surface of the conductive ring 25 when it contacts the conductive ring 25. The rolling method can greatly reduce the friction loss between the power receiving ball 26 and the conductive ring 25, thereby extending its service life.

[0028] The working principle of the present invention is as follows: First, fix the oilstone 10 on each oilstone clamp 9, and then start the hydraulic cylinder 12 to push the sealing plate 13 to move in the pressurizing cylinder 11. At this time, the electrorheological fluid 15 is in liquid state. Since each cylinder 6 is connected to the pressurizing cylinder 11, each oilstone 10 can be pushed downward by hydraulic means for compensation. Compared with the prior art, the hydraulic pressure in each cylinder 6 is consistent, so that the degree of compression between each oilstone 10 and the workpiece is the same, thereby ensuring that the fine grinding effect on various parts of the workpiece is uniform.

[0029] Then start the motor 17 to drive the rotating shaft 18 to rotate, and the rotating shaft 18 drives the fixing rod 27 and the sliding sleeve 28 to rotate. Under the action of centrifugal force, the sliding sleeve 28 slides in the direction away from the rotating shaft 18, so that the charging ball 26 contacts the conductive ring 25, and the electrorheological fluid is connected to the electric field, so that the electrorheological fluid 15 automatically undergoes a liquid-solid transformation, without the need for manual operation, which is conducive to improving work efficiency. After the electrorheological fluid 15 is energized, the electrorheological fluid 15 is transformed from a liquid fluid to a solid state, thereby realizing the positioning of the oilstone 10. Compared with the prior art, the method of pressing and positioning the oilstone by air pressure or hydraulic pressure has the advantage of better stability. After positioning, the oilstone 10 is not easy to jump due to the problem of expansion and contraction between gas and liquid. While ensuring the fine grinding effect, it also extends the service life of the oilstone 10 and improves the processing stability.

[0030] The rotating shaft 18 can synchronously drive the transmission rod I 20 and the transmission rod II 21 to rotate, and then push the oilstone rack 5 to swing back and forth along the slide rail 4 through the push rod 22 to achieve fine processing of the workpiece. By adjusting the length of the telescopic rod 23, the size of the angle between the transmission rod I 20 and the transmission rod II 21 can be changed, and then the reciprocating swing amplitude of the oilstone rack 5 can be adjusted and changed. The adjustment work is convenient, and synchronous adjustment can be performed during the fine processing process to ensure the continuity of the processing work. The positioning and reciprocating swing work of the oilstone 10 are carried out synchronously and closely matched.

Claims

1. A superfinishing machine for processing a fuel injection pump roller, comprising a workbench (1) and two superfinishing guide rollers (2) mounted on the workbench (1), characterized in that: A support plate (3) is fixed on the workbench (1), a slide rail (4) is fixedly mounted on the support plate (3), an oilstone rack (5) is slidably connected to the slide rail (4), a plurality of oilstone clamping mechanisms arranged at equal distances are fixed on the oilstone rack (5), and a reciprocating mechanism for driving the oilstone rack (5) to swing is mounted on the support plate (3); The oilstone clamping mechanism comprises a cylinder (6) fixed on an oilstone frame (5), an annular groove (7) is provided in the cylinder (6), a piston plate (8) is sealingly slidably provided in the annular groove (7), an oilstone clamp (9) is fixed to the bottom of the piston plate (8), an oilstone (10) is fixed to the oilstone clamp (9), a pressure cylinder (11) is fixed to the pressure cylinder (11), a hydraulic cylinder (12) is fixedly mounted on the pressure cylinder (11), an output end of the hydraulic cylinder (12) is connected to a sealing plate (13), the sealing plate (13) is sealingly slidably fitted in the pressure cylinder (11), an output end of the pressure cylinder (11) is connected to a multi-way tube (14), the output end of the multi-way tube (14) is connected to each cylinder (6), and the pressure cylinder (11) and the cylinder (6) are filled with electrorheological fluid (15); The support plate (3) is provided with an energizing mechanism, and the electrorheological fluid (15) is connected to a power supply via the energizing mechanism. After the electrorheological fluid (15) is energized, the electrorheological fluid (15) is converted from a liquid fluid to a solid state, thereby achieving positioning of the oilstone (10).

2. The superfinishing machine for processing the fuel injection pump roller according to claim 1, characterized in that: A limiting groove (16) is provided at the bottom of the cylinder barrel (6), and the oilstone (10) penetrates and fits in the limiting groove (16).

3. The superfinishing machine for processing the fuel injection pump roller according to claim 1, characterized in that: The reciprocating mechanism comprises a motor (17) mounted on a support plate (3); a rotating shaft (18) is connected to an output shaft of the motor (17); a rotating wheel (19) is fixed to the rotating shaft (18); a transmission rod I (20) is fixed to the rotating wheel (19); an end of the transmission rod I (20) is rotatably connected to a transmission rod II (21); an end of the transmission rod II (21) is rotatably connected to a push rod (22); the push rod (22) is rotatably connected to an oilstone rack (5); an adjusting mechanism is provided between the transmission rod I (20) and the transmission rod II (21); the adjusting mechanism is used to change the size of an angle between the transmission rod I (20) and the transmission rod II (21).

4. The superfinishing machine for processing the fuel injection pump roller according to claim 3, characterized in that: The adjustment mechanism is a telescopic rod (23) rotatably mounted on the transmission rod I (20), and the output end of the telescopic rod (23) is rotatably connected to the transmission rod II (21).

5. The superfinishing machine for processing the fuel injection pump roller according to claim 3, characterized in that: The energizing mechanism comprises a box body (24) fixed on the side wall of the support plate (3), the rotating shaft (18) passing through the box body (24), a conductive ring (25) being mounted on the inner wall of the box body (24), the conductive ring (25) being electrically connected to the electrorheological fluid (15), a power receiving ball (26) matching the conductive ring (25) being arranged in the box body (24), the power receiving ball (26) being electrically connected to a power source, and when the conductive ring (25) and the power receiving ball (26) are in contact, the electrorheological fluid (15) is energized.

6. The superfinishing machine for processing the fuel injection pump roller according to claim 5, characterized in that: A fixing rod (27) and a sliding sleeve (28) are also provided in the box body (24); the fixing rod (27) is fixedly connected to the rotating shaft (18); the sliding sleeve (28) is slidably sleeved on the fixing rod (27); and the electrical connection ball (26) is provided on the sliding sleeve (28).

7. The superfinishing machine for processing the fuel injection pump roller according to claim 5, characterized in that: The end of the sliding sleeve (28) is provided with a slot, a universal bearing (29) is fixedly installed in the slot, and the power receiving ball (26) is installed in the universal bearing (29).

8. The superfinishing machine for processing the fuel injection pump roller according to claim 1, characterized in that: A feeding plate (30) is fixed on the workbench (1), the feeding plate (30) is located at the input end of the super-precision guide roller (2), and the angle between the feeding plate (30) and the horizontal plane is 30°.

9. The superfinishing machine for processing the fuel injection pump roller according to claim 1, characterized in that: A pressure sensor (31) is installed in the cylinder (6).

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