Steering engine rotor machining tool

Abstract

The steering engine rotor machining tool comprises a tool base column, the tool base column is provided with a base part connected with a machine tool workbench, the tool base column has a certain height, and the upper end of the tool base column forms an installation end of a workpiece; a plurality of step notches are distributed in the circumferential direction of the mounting end, and each step notch is provided with a placement opening facing the outer side and a jacking opening leading to the upper end face of the tool foundation pillar; a jacking device is placed in the step notch, and the free end of the upper portion of the jacking device extends out of the jacking opening. The steering engine rotor machining tool can keep concentric positioning with a workpiece through the annular positioning boss at the upper end of the tool base column after one-time concentricity calibration, due to the fact that the workpiece has a certain length, only the perpendicularity of the workpiece needs to be corrected when the workpiece is replaced for machining, and the clamping and correcting time is greatly shortened; in addition, in order to increase the applicability, the tool is further provided with a stacking ring used in cooperation with the tool base column, and therefore the lifting height or the diameter of the mounting end can be changed.

Description

Technical Field

[0001] The utility model relates to the technical field of ship processing, and particularly relates to a processing tooling for a rotor of a steering gear. Background Art

[0002] A rotary vane steering gear is usually used in a steering control system of a ship. On a ship, it mainly controls the direction of a rudder, thereby affecting the course of the ship. The working principle of a rotary vane steering gear is to change the position of a rudder vane through an electric or hydraulic driving device. When the direction needs to be adjusted, the steering gear receives a signal, and then transmits power to the rudder vane through gears, connecting rods or other mechanical structures to rotate it to a specified angle.

[0003] The external circle grinding of the rotor of a rotary vane steering gear generally refers to the process of finely processing the edge of the blades on the rotor or the entire external circle of the rotor to achieve the required geometric accuracy and surface finish. This type of steering gear is commonly found in the steering systems of ships and industrial automation equipment. The rotor part may include multiple blades, and these blades form a seal with the steering gear housing and participate in the driving process.

[0004] The processing requirements for the rotor of a rotary vane steering gear are very high. There are very high requirements for the surface roughness and perpendicularity of the upper and lower external circles, inner holes and the arc surface between moving blades of the rotor. A vertical grinding machine is used to process the rotor of the steering gear; the machine tool is equipped with two grinding heads. One grinding head is equipped with a grinding wheel with a diameter of 300, which is used to process the external circle and inner hole of the rotor. The other grinding head is equipped with a grinding wheel with a diameter of 600, which is used to process the arc surface between the moving blades of the rotor. Due to the size limitation of the steering gear rotor parts, it is necessary to add a high iron of equal height to raise the height of the rotor for processing each time the arc surface is processed. This process wastes a large amount of clamping and calibration time, reduces the utilization rate of the machine tool, and cannot meet the production cycle requirements of our company.

[0005] In view of the above, it is necessary to propose a processing tooling and method for a rotor of a steering gear to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the defects existing in the prior art and provide a processing tooling and method for a rotor of a steering gear.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows: A processing tooling for a rotor of a steering gear includes a tooling base column, which has a base part connected to the workbench of the machine tool. The tooling base column has a certain height, and the upper end of the tooling base column forms an installation end for the workpiece; a plurality of stepped notches are circumferentially distributed at the installation end. The stepped notches have an insertion port facing outward and a jacking port leading to the upper end surface of the tooling base column; a jacking device is placed in the stepped notches, and the free end of the upper part of the jacking device extends out from the jacking port.

[0008] Further, the base portion is an annular stepped edge with an enlarged diameter that is connected to the bottom of the tooling base column and extends outward. A plurality of slotted oblong holes are circumferentially distributed on the stepped edge. The length direction of the slotted oblong holes is arranged radially. Fixed bolts connected to the machine tool worktable are provided in the slotted oblong holes.

[0009] Further, it further includes a pressing and positioning device. A screw hole is provided at the center of the upper end face of the tooling base column. The pressing and positioning device includes a pressing plate, a screw rod, and a pressing nut. The screw rod passes through the through hole at the center of the pressing plate and the lower end is screwed into the screw hole. The pressing nut is screwed onto the screw rod and is located above the pressing plate.

[0010] Further, a ring-shaped positioning boss is provided on the upper end face of the tooling base column, and the ring-shaped positioning boss is matched with the groove on the lower end face of the workpiece.

[0011] Further, it further includes stacking rings with different heights and diameters. An annular groove matched with the positioning boss is provided on the lower end face of the stacking ring, and a positioning boss is provided on the upper end face of the stacking ring.

[0012] Further, the jacking device is a jack.

[0013] Further, the processing tooling is made of S355J2G3 steel.

[0014] A method for machining a servo rotor using the above-mentioned servo rotor processing tooling includes the following steps:

[0015] S1, install the tooling on the machine tool worktable through the base portion, and use a dial indicator to correct the concentricity. After the error of the tooling working surface is ≤ 0.015 mm, pass the fixed bolt to fix the tooling base column on the machine tool worktable;

[0016] S2, pre-install the workpiece on the tooling base column, make the groove on the lower end face of the workpiece snap into the ring-shaped positioning boss, and correct the end face runout of the workpiece to be ≤ 0.02 mm;

[0017] S3, in S2, use the jacking device to adjust the workpiece. Place the jacking device into the stepped notch on the side of the workpiece that needs to be jacked up, finely adjust and jack up the workpiece and insert copper sheets into the gap formed by the jacking;

[0018] S4, use the pressing and positioning device to fix the workpiece on the tooling base column. Install the pressing nut and the pressing plate on the screw rod in sequence, pass the screw rod through the shaft hole of the workpiece, and the lower end of the screw rod is screwed into the screw hole. Rotate the upper pressing nut to make the pressing plate press on the workpiece;

[0019] S5, rough and finish grind the inner taper hole, the corresponding plane, and the upper and lower outer circles with a left grinding head to ensure a roughness of 0.8;

[0020] S6. Roughly and precisely grind the arc surface between the moving blades with the right grinding head to ensure a roughness of 0.8.

[0021] The advantages and beneficial effects of the present utility model are as follows: A processing tooling for a steering gear rotor of the present utility model can perform batch processing production after one concentricity calibration. The annular positioning boss at the upper end of the tooling base column can keep concentric positioning with the workpiece. Since the workpiece has a certain length, only the perpendicularity of the workpiece needs to be corrected when changing the workpiece for processing, greatly reducing the clamping and calibration time. And in order to increase the applicability, the present tooling is also provided with a stacking ring used in conjunction with the tooling base column, so as to change the lifting height or the diameter of the installation end. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of a processing tooling for a steering gear rotor of the present utility model;

[0023] Figure 2 is a schematic structural diagram of the tooling base column in the present utility model;

[0024] Figure 3 is an exploded view of a processing tooling for a steering gear rotor of the present utility model and the workpiece;

[0025] Figure 4 is a schematic longitudinal sectional view of a processing tooling for a steering gear rotor of the present utility model;

[0026] Figure 5 is an assembly schematic diagram of the tooling base column and the stacking ring in the present utility model;

[0027] Figure 6 is an exploded view of the tooling base column and the stacking ring in the present utility model;

[0028] In the figure: 1. Tooling base column; 2. Base part; 3. Installation end; 4. Step notch; 5. Placement opening; 6. Jacking opening; 7. Jacking device; 8. Step edge; 9. Open waist hole; 10. Screw hole; 11. Pressing plate; 12. Screw; 13. Pressing nut; 14. Through hole; 15. Annular positioning boss; 16. Stacking ring; 17. Annular groove. Detailed Embodiments

[0029] The following combines the drawings and embodiments to further describe the detailed embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0030] A processing tooling for a steering gear rotor, as Figure 1-6As shown in the figure, it includes a tooling base column 1, which has a base part 2 connected to the machine tool workbench. There is a rotatable machine tool workbench on the vertical grinding machine. The machine tool is equipped with two grinding heads. One grinding head is equipped with a grinding wheel with a diameter of 300, which is used for machining the outer circle and inner hole of the rotor. The other grinding head is equipped with a grinding wheel with a diameter of 600, which is used for machining the arc surface between the moving blades of the rotor. During installation, the tooling base column 1 is fixed on the workbench. Specifically, as Figure 1 , 2 shown, the base part 2 is an annular stepped edge 8 with an enlarged diameter that is connected to the bottom of the tooling base column 1 and extends outward. A plurality of slotted oblong holes 9 are circumferentially distributed on the stepped edge 8. The laterally protruding step provides sufficient installation positions for the fixing bolts. In this embodiment, the tooling base column 1 is connected to the machine tool workbench by arranging a plurality of slotted oblong holes 9 around the stepped edge 8. It can be understood that the length direction of the slotted oblong holes 9 is arranged radially. Designing the fixing holes in the form of slotted oblong holes can facilitate the adjustment of the concentricity between the tooling base column 1 and the workbench, so that the tooling base column 1 has an adjustment margin; and there are multiple T-shaped grooves for fixing on the machine tool workbench. Fixing bolts connected to the machine tool workbench are arranged in the slotted oblong holes 9; the lower end of the fixing bolt is stuck into the T-shaped groove to realize the fixation with the machine tool workbench, and the upper end is tightened to complete the positioning of the fixing bolt. And the fixing bolts around the stepped edge 8 are tightened in accordance with the rule of tightening diagonally.

[0031] As Figure 1 shown, the tooling base column 1 has a certain height, which is determined according to the actual machining parts required by the workpiece. When the rotor workpiece is fixed on the tooling base column 1, the workpiece can be raised by a certain height to ensure that all the machining parts on the surface of the raised workpiece can be machined, which is convenient for the grinding wheel to machine the workpiece; during actual use, a ring-shaped positioning boss 15 is provided on the upper end surface of the tooling base column 1, and the ring-shaped positioning boss 15 cooperates with the groove on the lower end surface of the workpiece. Therefore, when installing the rotor workpiece, it can be quickly pre-positioned by fitting the groove at the lower end of the workpiece into the ring-shaped positioning boss 15. This tooling is designed and customized according to the required workpiece, so the dimensions of the positioning boss and the groove on the workpiece correspond. During installation, quick centering and positioning can be carried out. The tooling is manufactured by our company, which reduces the production cost. The whole tooling is a welded part, which is spliced by two S355J2G3 steel plates with a thickness of 150 mm, saving costs; machining the upper and lower end surfaces, outer circle of the tooling, milling each waist-shaped groove, machining the upper end screw holes 10, and grinding the upper and lower planes flat, etc.

[0032] Furthermore, as Figure 2 , 3As shown in the figure, the upper end of the tooling base column 1 forms the installation end 3 of the workpiece. As described above, the protruding annular positioning boss 15 can be used to conveniently center and install the lower end of the workpiece. Since the servo rotor workpiece has a certain height, its bottom is easy to be installed and positioned. However, after installation, the top of the workpiece is prone to slight deflection. To solve this problem, in this embodiment, a plurality of stepped notches 4 are circumferentially distributed on the installation end 3. The stepped notch 4 has an inlet 5 facing outward and a jacking port 6 leading to the upper end face of the tooling base column 1. A jacking device 7 is placed in the stepped notch 4, and the upper free end of the jacking device 7 extends out from the jacking port 6. During actual use, when the workpiece is installed in place, the lower end face of the workpiece will cover the jacking port 6. The jacking device 7 is placed into the stepped notch through the inlet 5, and the side of the workpiece that needs to be adjusted is slightly jacked up by the jacking device 7, thereby adjusting the deflection of the workpiece, so that the workpiece and the machine tool worktable maintain a high coaxiality; As Figure 2 shown, in this embodiment, four stepped notches 4 are provided on the installation end 3. The number of them is not limited and can be increased or decreased. The jacking device 7 can be used alternately in each stepped notch 4 to achieve precise adjustment of all around the workpiece. During actual use, the jacking device 7 can adopt a small jack, that is, it can be placed into the stepped notch 4.

[0033] Further, after the error correction of the upper end of the workpiece, the workpiece can be fixed, which is beneficial to the next step of processing the workpiece. Specifically, the upper end of the workpiece is clamped and positioned by a pressing and positioning device. A screw hole 10 is provided at the center of the upper end face of the tooling base column 1. Specifically, the pressing and positioning device includes a pressing plate 11, a screw 12, and a pressing nut 13. The screw 12 passes through the through hole 14 at the center of the pressing plate 11 and the lower end is screwed into the screw hole 10, and the pressing nut 13 is screwed on the screw 12 and is located above the pressing plate 11. As Figure 4 shown, when fixing the workpiece, the screw 12 is inserted through the shaft hole of the workpiece, and the lower end of the screw 12 is screwed into the screw hole 10. Then, the pressing plate 11 is sleeved on the upper end of the screw 12, and the pressing nut 13 is screwed in. The pressing nut 13 is gradually tightened, and the pressing plate 11 uniformly presses on the upper end of the workpiece, so as to jointly form clamping of the workpiece with the tooling base column 1 below. Since the tooling base column 1 is fixed on the machine tool worktable, the fixing of the workpiece is completed.

[0034] Considering the usage frequency of the tooling, in this embodiment, better materials are used to make this tooling. Specifically, the tooling is made of S355J2G3 steel. The rest of the standard parts are preferably national standard parts, which have low cost and are easy to replace.

[0035] As another embodiment, since the model sizes of the servo rotors are different, in this embodiment, in order to increase the applicable range of the tooling, superimposed rings 16 with different heights and diameters are also provided. As Figure 5, 6 As shown, an annular groove 17 matching with the positioning boss is provided on the lower end surface of the superimposed ring 16, and a positioning boss is provided on the upper end surface of the superimposed ring 16. The superimposed ring 16 is designed according to the size of the workpiece to be processed. The lower end surface of the superimposed ring 16 is designed to be a structure matching with the installation end 3 of the tooling base column 1, that is, the cooperation between the annular groove 17 and the annular positioning boss 15, while the upper end surface of the superimposed ring 16 forms a new installation end 3 adapting to the positioning of the new workpiece, so that workpieces of other model sizes can be installed.

[0036] Specifically, it further includes a method for machining a steering gear rotor using the above-mentioned steering gear rotor machining tooling, which includes the following steps:

[0037] S1, install the tooling on the machine tool workbench through the base part 2, and use a dial indicator to correct the concentricity. The tooling needs to be installed on the machine tool workbench and fixed on the workbench by bolts; considering the diameter and universality of the grinding wheel 600, the height of the tooling is designed to be 250 mm; after the working surface error of the tooling ≤ 0.015 mm, pass the fixing bolts to fix the tooling base column 1 on the machine tool workbench; specifically, a dial indicator can be used to perform concentric calibration on the position of the tooling base column 1 and the machine tool workbench. After reaching the required error range, tighten the fixing bolts around the step edge 8.

[0038] S2, pre-install the workpiece on the tooling base column 1, make the groove on the lower end surface of the workpiece snap into the annular positioning boss 15, and correct the end face runout of the workpiece ≤ 0.02 mm; the lower end surface of the workpiece can be snapped into the installation end 3 to achieve better concentric positioning, while the upper end needs to be corrected.

[0039] S3, in S2, use the jacking device 7 to adjust the workpiece. Place the jacking device 7 into the step notch 4 on one side where the workpiece needs to be jacked up, slightly jack up the workpiece and stuff copper sheets into the gap formed by the jacking. The material of the workpiece to be processed is ductile iron; machine the upper and lower outer circles, inner holes and the arc surface between the moving blades on a vertical grinding machine; after the workpiece is installed on the tooling base column 1, correct the runout of the upper end face of the workpiece ≤ 0.02 mm; specifically, the runout detection method is the same as that in step 1. Use a dial indicator to check the runout of the upper end of the workpiece. When it exceeds the range, place the jack into the step notch 4 closest to it, and use the jack to perform a slight jacking adjustment on the workpiece to make the runout amplitude meet the error range. The gap formed between the workpiece and the tooling base column 1 due to the jacking can be filled by padding copper sheets; after correcting the concentricity of the upper end of the workpiece in this way, then fix the workpiece as a whole.

[0040] S4. Use the pressing and positioning device to fix the workpiece on the tooling base column 1. Install the pressing nut 13 and the pressing plate 11 on the screw rod 12 in sequence, and pass the screw rod 12 through the shaft hole of the workpiece. The lower end of the screw rod 12 is screwed into the screw hole 10. Rotate the upper pressing nut 13 to make the pressing plate 11 press on the workpiece; Pass the screw rod 12 through the shaft hole of the workpiece, and screw the lower end of the screw rod 12 into the screw hole 10. Then, put the pressing plate 11 on the upper end of the screw rod 12, and screw in the pressing nut 13. Gradually tighten the pressing nut 13, and evenly press on the upper end of the workpiece through the pressing plate 11, so as to jointly form a clamp on the workpiece with the lower tooling base column 1. Since the tooling base column 1 is fixed on the machine tool workbench, the fixation of the workpiece is completed; After the fixation is completed, the workpiece can be accurately processed.

[0041] S5. Use the left grinding head to rough grind and finish grind the inner conical hole, the corresponding plane, and the upper and lower outer circles to ensure a roughness of 0.8;

[0042] S6. Use the right grinding head to rough grind and finish grind the arc surface between the moving blades to ensure a roughness of 0.8.

[0043] This tooling simplifies the cumbersome clamping and calibration processes of the existing servo rotor workpiece, improves the use efficiency of the machine tool, meets the production cycle requirements of our company, and effectively improves the production efficiency.

[0044] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A steering gear rotor processing tool, characterized in that: The tooling column (1) comprises a base portion (2) connected to a machine tool worktable, the tooling column (1) having a certain height, the upper end of the tooling column (1) forming a workpiece mounting end (3); a plurality of step notches (4) are distributed circumferentially of the mounting end (3), the step notches (4) having an insertion opening (5) facing outward and a lifting opening (6) leading to the upper end surface of the tooling column (1); a lifting device (7) is placed in the step notch (4), and the upper free end of the lifting device (7) extends out from the lifting opening (6).

2. A steering gear rotor processing tool according to claim 1, characterized in that: The base portion (2) is connected to the bottom of the tooling base column (1) and extends outward to form an annular step edge (8) with an enlarged diameter. The step edge (8) is provided with a plurality of open waist holes (9) distributed in the circumferential direction. The length direction of the open waist holes (9) is arranged radially. The open waist holes (9) are provided with fixing bolts connected to the machine tool workbench.

3. The steering gear rotor processing tool according to claim 2, characterized in that: It also includes a clamping and positioning device, wherein a screw hole (10) is provided at the center of the upper end surface of the tooling base column (1), and the clamping and positioning device includes a clamping plate (11), a screw rod (12), and a clamping nut (13). The screw rod (12) passes through a through hole (14) at the center of the clamping plate (11) and the lower end is screwed into the screw hole (10). The clamping nut (13) is screwed onto the screw rod (12) and is located on the upper side of the clamping plate (11).

4. The steering gear rotor processing tool according to claim 1, characterized in that: The upper end surface of the tooling base column (1) is provided with an annular positioning boss (15), and the annular positioning boss (15) cooperates with a groove on the lower end surface of the workpiece.

5. The steering gear rotor processing tool according to claim 4, characterized in that: It also includes stacking rings (16) of various heights and diameters, wherein the lower end surface of the stacking ring (16) is provided with an annular groove (17) that matches the positioning boss, and the upper end surface of the stacking ring (16) is provided with a positioning boss.

6. The steering gear rotor processing tool according to claim 1, characterized in that: The lifting device (7) is a jack.

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