Grinding device and method for the arc surface of the fork head of a shift fork

Abstract

The present application belongs to the technical field of part processing, and relates to a fork head arc surface grinding device and method for a shift fork type part. The device comprises a mounting bracket, a pressing center, an adjusting center and an arc-shaped bracket. The pressing center and the adjusting center are coaxially arranged on the mounting bracket from top to bottom. The arc-shaped bracket is arranged between the pressing center and the adjusting center. The upper end surface of the arc-shaped bracket is in contact with the pressing center, and the lower end surface of the arc-shaped bracket is in contact with the adjusting center. The arc-shaped bracket rotates around the axial direction of the pressing center. The present application provides a fork head arc surface grinding device and method for a shift fork type part, which has stable processing quality, high efficiency, low cost, convenient processing operation and strong adaptability.

Description

Technical Field

[0001] This invention belongs to the field of parts processing technology, and relates to a grinding device and processing method for the arc surface of the fork head of a shift fork type parts. Background Technology

[0002] Fork-type parts in aircraft engine fuel control systems, a curved surface with specific precision and surface roughness requirements needs to be machined at one end of the fork (see...). Figure 1 and Figure 2 The processing technology generally involves first performing wire cutting for rough machining, followed by several grinding operations. This grinding process can also be completed on a CNC grinding machine, but the equipment capacity is limited, the processing cost is high, and the production efficiency is low. Summary of the Invention

[0003] To address the technical problems of high processing costs and low production efficiency in existing arc surface machining, this invention provides a grinding device and method for the arc surface of fork heads of shift fork parts. The grinding results in stable processing quality, high efficiency, low cost, convenient operation, and strong adaptability.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A grinding device for the arc surface of the fork head of a shift fork type part includes a mounting bracket, a clamping center, an adjusting center, and an arc-shaped frame. The clamping center and the adjusting center are respectively placed on the mounting bracket from top to bottom, and are coaxially arranged. The arc-shaped frame is placed between the clamping center and the adjusting center. The upper end face of the arc-shaped frame is pressed against the clamping center, and the lower end face of the arc-shaped frame is pressed against the adjusting center. The arc-shaped frame rotates around the axial direction of the clamping center.

[0006] Furthermore, the mounting bracket includes a base plate, a support column, a guide plate, and a pressure plate placed sequentially from bottom to top; the guide plate is connected to the base plate through the support column, and the plane of the base plate is perpendicular to the axis of the support column; the adjusting tip is placed on the base plate, and the axis of the adjusting tip is parallel to the axis of the support column; one end of the pressing tip is connected to the lower end face of the pressure plate, and the other end of the pressing tip passes through the guide plate and is pressed against the upper end face of the bow-shaped frame; the pressure plate moves downward along the axis of the support column to press the pressing tip.

[0007] Furthermore, the grinding device for the arc surface of the fork-type parts also includes a stud and an adjusting support arranged in parallel; a spring is wound around the outer wall of the stud along the stud axis; the stud passes through the pressure plate and the guide plate from top to bottom, and the stud is fastened to the upper end face of the pressure plate and the lower end face of the guide plate respectively; the spring is located between the pressure plate and the guide plate; one end of the adjusting support is connected to the lower end face of the pressure plate; the other end of the adjusting support passes downward through the guide plate and is fastened to the lower end face of the guide plate; the adjusting support and the clamping center are arranged on both sides of the stud.

[0008] Further, the fork head arc surface grinding device of the fork type part further comprises a stopper arranged on the bottom plate and located directly below the stud; the stopper has an included angle between the axial direction and the horizontal direction of the bottom plate.

[0009] Further, the positioning shaft and the positioning bushing are arranged on the arcuate frame; the positioning bushing is embedded on the sidewall of the arcuate frame, the positioning shaft is fastened with the outer wall of the arcuate frame through the positioning bushing, and the axial direction of the positioning shaft is perpendicular to the axial direction of the arcuate frame; the axial direction of the positioning shaft is the same as the axial direction of the positioning bushing.

[0010] Further, a rocker handle is further arranged on the arcuate frame; the rocker handle is located below the positioning shaft.

[0011] Further, two guide sleeves are further arranged on the arcuate frame; the two guide sleeves are symmetrically arranged about the axial direction of the positioning shaft; the rocker handle is located above the guide sleeves.

[0012] Further, the fork head arc surface grinding device of the fork type part further comprises a V-shaped block, a flat plate and a guide column; the flat plate and the V-shaped block located below the flat plate form a cuboid, one end of the guide column is connected with the V-shaped block, the other end of the guide column passes through the guide sleeve, and the cuboid is located inside the arcuate frame.

[0013] A processing method based on the fork head arc surface grinding device of the fork type part, characterized in that the processing method comprises the following steps:

[0014] 1) fixing the bottom plate on the grinding machine, clamping the fork type part between the arches of the arcuate frame, and making the rotation center axis of the arc surface to be processed the same as the axial direction of the arcuate frame;

[0015] 2) placing the bottom end of the arcuate frame on the adjusting center, contacting the top end of the arcuate frame with the pressing center, and positioning and clamping the arc surface to be processed on the arcuate frame, so that the rotation center of the arc surface to be processed coincides with the line between the pressing center and the adjusting center, and the arc surface to be processed is adapted to the grinding position of the grinding wheel on the grinding machine;

[0016] 3) adjusting the height of the fork type part, starting the grinding machine, rotating the rocker handle to drive the arcuate frame to rotate along the horizontal direction of the positioning shaft, and completing the grinding of the fork head arc surface of the fork type part.

[0017] Further, in the step 2), the angular position of the arc surface to be processed is determined by the V-shaped block and the guide column, and the arc surface to be processed on the arcuate frame is clamped by adjusting the axial height of the stud; in the step 3), the arcuate frame is limited in the angle size during the horizontal rotation by the stopper.

[0018] The beneficial effects of the present application are:

[0019] 1. The processing device and processing method have stable processing quality, high efficiency, convenient implementation, strong adaptability and low cost.

[0020] 2. The grinding processing device and processing method for the fork head arc surface of the fork type part are suitable for on-site production, can give corresponding processing positions according to different sizes and positioning requirements of the workpiece, and can complete related processing by installing the device on a common cylindrical grinding machine, so that the applicability is strong.

[0021] 3. The grinding processing device and processing method for the fork head arc surface of the fork type part are applied to actual production, improve the grinding processing technology of the fork head arc surface of the fork type part, have good processing effect, are simple and convenient to use, stable and reliable, and are suitable for grinding processing production of the fork head arc surface of the fork type part. DETAILED DESCRIPTION

[0022] Figure 1 is a structure diagram of a first fork type part;

[0023] Figure 2 is a structure diagram of a second fork type part;

[0024] Figure 3 is a schematic diagram of an installation support provided by the present application;

[0025] Figure 4 is a schematic diagram of the present application Figure 3 ;

[0026] Figure 5 is a schematic diagram of an arc-shaped frame provided by the present application;

[0027] Figure 6 is a schematic diagram of a V-shaped block structure provided by the present application;

[0028] Figure 7 is Figure 6 a schematic diagram of a F-F surface section in the present application;

[0029] Among them:

[0030] 1 - base plate; 2 - pressing center; 3 - adjusting center; 4 - pressing center bushing; 5 - pressing plate; 6 - supporting column; 7 - guide plate; 8 - stop block; 9 - guide plate fastening screw; 10 - adjusting center positioning washer; 11 - fastening nut; 12 - stud positioning washer; 13 - stud; 14 - wing nut; 15 - adjusting support; 16 - spring; 17 - stop block fastening bolt; 18 - stop block washer; 19 - fastening screw; 20 - guide plate positioning pin; 21 - arch bracket; 22 - center bushing; 23 - rocker handle; 24 - V-shaped block; 25 - positioning bushing; 26 - flat plate; 27 - positioning shaft; 28 - guide sleeve; 29 - V-shaped block positioning screw; 30 - V-shaped block positioning pin; 31 - guide column; 32 - positioning washer; 33 - positioning nut. DETAILED DESCRIPTION

[0031] The present application will be described in detail with reference to the accompanying drawings and examples.

[0032] EXAMPLE

[0033] REFERENCE Figure 3 , Figure 4 and Figure 5 The fork head arc surface grinding device for the fork type part comprises a mounting bracket, a pressing center 2, an adjusting center 3 and an arch bracket 21. The pressing center 2 and the adjusting center 3 are coaxially arranged on the mounting bracket from top to bottom. The arch bracket 21 is arranged between the pressing center 2 and the adjusting center 3. The upper end surface of the arch bracket 21 is in abutment with the pressing center 2, and the lower end surface of the arch bracket 21 is in abutment with the adjusting center 3. The arch bracket 21 rotates around the axial direction of the pressing center 2.

[0034] The mounting bracket comprises a base plate 1, a supporting column 6, a guide plate 7 and a pressing plate 5 arranged in sequence from bottom to top. The guide plate 7 is connected with the base plate 1 through the supporting column 6. The plane where the base plate 1 is located is perpendicular to the axial direction of the supporting column 6.

[0035] The base plate 1 is a rectangular plate, and the supporting column 6 is a reversed T-shaped column. The supporting column 6 is fixed on the end surface of the left side of the base plate 1 through the fastening screw 19. The adjusting center 3 is arranged on the end surface of the left side of the base plate 1. The adjusting center positioning washer 10 is arranged between the adjusting center 3 and the base plate 1 to position the adjusting center 3. The short center of the adjusting center 3 faces upward. The stop block 8 is arranged on the base plate 1 and located between the supporting column 6 and the adjusting center 3. The stop block 8 is located directly below the stud 13. There is an angle between the axial direction of the stop block 8 and the horizontal direction of the base plate 1. The stop block 8 is fastened with the base plate 1 through the stop block washer 18 and the stop block fastening bolt 17.

[0036] The guide plate 7 is a rectangular plate, the guide plate 7 is placed above the supporting column 6, and the left end of the guide plate 7 is connected with the supporting column 6 through the guide plate fastening screw 9 and the guide plate positioning pin 20 respectively; the pressing plate 5 is placed above the guide plate 7, the pressing plate 5 is connected with the guide plate 7 through the stud 13 and the adjusting support 15, and moves up and down along the height direction, and is pressed downward, the stud 13 and the adjusting support 15 are arranged in parallel, and the adjusting support 15 and the pressing center 2 are arranged on the two sides of the stud 13.

[0037] The spring 16 is wound on the outer wall of the stud 13 along the axial direction of the stud 13, the stud 13 passes through the pressing plate 5 and the guide plate 7 from top to bottom in sequence, the stud 13 is fastened with the upper end surface of the pressing plate 5 and the lower end surface of the guide plate 7 respectively, and the spring 16 is located between the pressing plate 5 and the guide plate 7. In implementation, the stud positioning washer 12 is further arranged between the stud 13 and the pressing plate 5 for positioning, and then the stud 13 is fastened through the wing nut 14; the stud 13 and the lower end surface of the guide plate 7 are fastened through the nut.

[0038] One end of the adjusting support 15 is connected with the lower end surface of the pressing plate 5, the other end of the adjusting support 15 passes through the guide plate 7 downward and is fastened with the lower end surface of the guide plate 7, the supporting end of the adjusting support 15 is connected with the lower end surface of the pressing plate 5, the other end of the adjusting support 15 passes through the guide plate 7 and is located below the guide plate 7, and the adjusting support 15 is fastened with the upper end surface of the guide plate 7 through the fastening nut 11.

[0039] One end of the pressing center 2 is connected with the lower end surface of the pressing plate 5, the other end of the pressing center 2 passes through the guide plate 7 and is located directly above the adjusting center 3, the upper end surface of the guide plate 7 of the pressing center 2 is further provided with the pressing center bushing 4, and the pressing center 2 passes through the pressing center bushing 4. In implementation, the center end of the pressing center 2 faces downward, the center end of the pressing center 2 is in close contact with the upper end surface of the arc-shaped frame 21, the center end of the adjusting center 3 is in close contact with the lower end surface of the arc-shaped frame 21, and the arc-shaped frame 21 is in close contact and positioning between the pressing center 2 and the adjusting center 3.

[0040] In implementation, the arc-shaped frame 21 is placed between the pressing center 2 and the adjusting center 3, the lower end surface of the arc-shaped frame 21 is placed on the center end of the adjusting center 3, then the height between the pressing plate 5 and the guide plate 7 is adjusted by adjusting the adjusting support 15 and the stud 13, the upper end surface of the arc-shaped frame 21 is in contact with the center end of the pressing center 2, the wing nut 14 is fastened to press the pressing center 2 downward, and the positioning and pressing of the arc-shaped frame 21 are completed.

[0041] Referring to Figure 5, the positioning shaft 27 is arranged on the arch frame 21, and the positioning bushing 25 is arranged on the side wall of the arch frame 21; the positioning bushing 25 is embedded in the side wall of the arch frame 21, the positioning shaft 27 is fastened with the outer wall of the arch frame 21 through the positioning bushing 25, and the positioning shaft 27 is perpendicular to the arch frame 21 in the axial direction; the positioning shaft 27 is the same as the arch frame 21 in the axial direction. The rocker handle 23 is further arranged on the arch frame 21; the rocker handle 23 is located below the positioning shaft 27. Two guide sleeves 28 are further arranged on the arch frame 21; the two guide sleeves 28 are arranged in axial symmetry about the positioning shaft 27; the rocker handle 23 is located above the guide sleeves 28.

[0042] The top end and the lower end of the arch frame 21 are provided with the center bushing 22 near the opening on the right side, so that the center pin 2 is pressed and the center pin 3 is adjusted and positioned in connection with the arch frame 21; the guide sleeve 28, the positioning shaft 27, the rocker handle 23 and the guide sleeve 28 are sequentially and parallelly arranged on the left side wall of the arch frame 21 from top to bottom, the two guide sleeves 28 are symmetrical about the positioning shaft 27, the positioning shaft 27 is located at the center of the arch frame 21 in the axial direction, the positioning shaft 27 penetrates the side wall of the arch frame 21, the left end of the positioning shaft 27 is fastened with the outer side wall of the arch frame 21 through the positioning washer 32 and the positioning nut 33, the right end of the positioning shaft 27 is positioned through the positioning bushing 25 embedded in the side wall of the arch frame 21, and the rocker handle 23 is located on the left side of the arch frame 21 and connected with the side wall of the arch frame 21.

[0043] Referring to Figure 6 and Figure 7 , the fork-shaped part fork head arc surface grinding device further comprises a V-shaped block 24, a flat plate 26 and a guide column 31; the flat plate 26 and the V-shaped block 24 located below the flat plate 26 form a cuboid, one end of the guide column 31 is connected with the V-shaped block 24, the other end of the guide column 31 penetrates the guide sleeve 28, and the cuboid is located inside the arch frame 21. The V-shaped block 24 is fastened with the flat plate 26 through the V-shaped block positioning screw 29 and the V-shaped block positioning pin 30.

[0044] The fork-shaped part fork head arc surface grinding method comprises the following steps:

[0045] 1) Fix the bottom plate 1 on the grinding machine, then clamp the fork-shaped part between the arch openings of the arch frame 21, and the rotation center axis of the arc surface to be machined is the same as the axial direction of the arch frame 21.

[0046] In implementation, the fork-shaped part is clamped and placed between the arch openings of the arch frame 21, the arc surface to be machined of the fork-shaped part is in contact with the inner wall of the arch frame 21 respectively, the arc surface to be machined is located between the center bushings 22, and the center point of the arc surface to be machined coincides with the axis of the center bushing 22.

[0047] 2) Put the bottom end of the arch-shaped frame 21 on the adjusting center 3, and the top end of the arch-shaped frame 21 contacts the pressing center 2, and the machining arc surface on the arch-shaped frame 21 is positioned and clamped, and the rotation center of the machining arc surface coincides with the line between the pressing center 2 and the adjusting center 3, and the machining arc surface is adapted to the grinding wheel machining position on the grinding machine.

[0048] The center bush 22 on the lower end surface of the arch-shaped frame 21 is clamped with the center end of the adjusting center 3, the height between the pressing plate 5 and the guide plate 7 is adjusted through the adjusting support 15 and the stud 13, the center end of the pressing center 2 is clamped with the center bush 22 on the lower end surface of the arch-shaped frame 21, and the wing nut 14 is tightened to press the pressing center 2 downward, the positioning and pressing of the arch-shaped frame 21 are completed, and the machining arc surface of the yoke type part on the arch-shaped frame 21 is clamped.

[0049] In step 2), the V-shaped block 24 and the flat plate 26 are placed in the yoke type part, the guide column 31 is axially sequentially inserted into the shaft hole on the yoke type part, the guide sleeve 28 and the side wall of the arch-shaped frame 21, the V-shaped block 24 contacts the inner wall of the left end of the yoke type part. Since the guide sleeve 28 is two, the V-shaped block 24 and the flat plate 26, the yoke type part and the arch-shaped frame 21 are fixed by the same method, the angular position of the machining arc surface is determined by the V-shaped block 24, the axial direction of the yoke type part is close to the axial position of the positioning shaft 27, and after the axial position is determined, the wing nut 14 is tightened to press the pressing center 2 downward, and then the machining arc surface is pressed.

[0050] After the arch-shaped frame 21 and the machining arc surface of the yoke type part are positioned and pressed, the V-shaped block 24, the flat plate 26 and the guide column 31 are removed.

[0051] 3) Adjust the height of the yoke type part, start the grinding machine, rotate the rocker handle 23 to drive the arch-shaped frame 21 to rotate along the horizontal direction of the positioning shaft 27, and complete the grinding of the arc surface of the yoke head.

[0052] In the implementation, the rocker handle 23 is rotated in the horizontal direction, the arch-shaped frame 21 is blocked by the stop block 8 in the horizontal rotation process due to the included angle between the stop block 8 and the horizontal direction, and then the angle of the rocker handle 23 is controlled, so as to repeat the machining of the machining arc surface.

[0053] The device and method are provided, the bottom plate is installed on the workbench of the grinding machine and has two centers, the arch-shaped frame with a rocker handle 23 is installed on the bottom plate, the machining arc surface can rotate around the vertical rotation center perpendicular to the workbench surface, and the corresponding arc surface machining is realized and completed on the ordinary grinding machine.

Claims

1. A grinding apparatus for the arc surface of the fork head of a shift fork type part, characterized in that, The installation support, the pressing center (2), the adjusting center (3) and the arcuate frame (21); the pressing center (2) and the adjusting center (3) are placed on the installation support from top to bottom respectively, the pressing center (2) and the adjusting center (3) are coaxially arranged, the arcuate frame (21) is placed between the pressing center (2) and the adjusting center (3), the upper end surface of the arcuate frame (21) is tightly contacted with the pressing center (2), the lower end surface of the arcuate frame (21) is tightly contacted with the adjusting center (3), the arcuate frame (21) rotates around the axial direction of the pressing center (2); The positioning shaft (27) is arranged on the arcuate frame (21), the axial direction of the positioning shaft (27) is perpendicular to the axial direction of the arcuate frame (21); two guide sleeves (28) are further arranged on the arcuate frame (21), the two guide sleeves (28) are symmetrically arranged about the axial direction of the positioning shaft (27); The fork head arc surface grinding device for the shift fork type part further comprises a V-shaped block (24), a flat plate (26) and a guide column (31); the flat plate (26) and the V-shaped block (24) below the flat plate (26) form a cuboid, one end of the guide column (31) is connected with the V-shaped block (24), the other end of the guide column (31) passes through the guide sleeve (28), and the cuboid is located inside the arcuate frame (21); the angular position of the arc surface to be processed is determined by the V-shaped block (24) and the guide column (31).

2. The yoke tip arc surface grinding device for yoke parts according to claim 1, characterized by The installation support comprises a bottom plate (1), a supporting column (6), a guide plate (7) and a pressing plate (5) placed in sequence from bottom to top; the guide plate (7) is connected with the bottom plate (1) through the supporting column (6), the plane where the bottom plate (1) is located is perpendicular to the axial direction of the supporting column (6); the adjusting center (3) is placed on the bottom plate (1), the axial direction of the adjusting center (3) is parallel to the axial direction of the supporting column (6); one end of the pressing center (2) is connected with the lower end surface of the pressing plate (5), the other end of the pressing center (2) passes through the guide plate (7) and is tightly contacted with the upper end surface of the arcuate frame (21); the pressing plate (5) moves downward along the axial direction of the supporting column (6) to press the pressing center (2).

3. The yoke tip arc surface grinding device for yoke type parts according to claim 2, characterized by The fork head arc surface grinding device for the shift fork type part further comprises a threaded stud (13) and an adjusting support (15) arranged in parallel; a spring (16) is wound around the threaded stud (13) in the axial direction of the threaded stud (13) on the outer wall of the threaded stud (13); the threaded stud (13) passes through the pressing plate (5) and the guide plate (7) in sequence from top to bottom, the threaded stud (13) is fastened with the upper end surface of the pressing plate (5) and the lower end surface of the guide plate (7) respectively, the spring (16) is located between the pressing plate (5) and the guide plate (7), one end of the adjusting support (15) is connected with the lower end surface of the pressing plate (5), the other end of the adjusting support (15) passes through the guide plate (7) downward and is fastened with the lower end surface of the guide plate (7), and the adjusting support (15) and the pressing center (2) are arranged on the two sides of the threaded stud (13).

4. The yoke tip arc surface grinding device for yoke parts according to claim 3, characterized by The fork head arc surface grinding device for the shift fork type part further comprises a stop block (8) arranged on the bottom plate (1) and located directly below the threaded stud (13); there is an included angle between the axial direction of the stop block (8) and the horizontal direction of the bottom plate (1).

5. The yoke tip arc surface grinding device according to any one of claims 1 to 4, characterized by, The positioning bushing (25) is embedded on the side wall of the arch-shaped frame (21), the positioning shaft (27) is fastened with the outer wall of the arch-shaped frame (21) through the positioning bushing (25), and the positioning shaft (27) is axially same with the positioning bushing (25).

6. The yoke tip arc surface grinding device for yoke parts according to claim 5, wherein The rocker handle (23) is further arranged on the arch-shaped frame (21); the rocker handle (23) is located below the positioning shaft (27).

7. The yoke tip arc surface grinding device for yoke parts according to claim 6, characterized by The rocker handle (23) is located above the guide sleeve (28).

8. A processing method of the yoke arc surface grinding device for the yoke of the shift fork type part based on the device according to claim 7, characterized by, The processing method comprises the following steps: 1) fixing the bottom plate (1) on the grinding machine, clamping the fork-shaped part between the arch-shaped frame (21), and making the rotation center axis of the processed arc surface same with the arch-shaped frame (21); 2) placing the bottom end of the arch-shaped frame (21) on the adjusting center (3), contacting the top end of the arch-shaped frame (21) with the pressing center (2), and positioning and clamping the processed arc surface on the arch-shaped frame (21), making the rotation center of the processed arc surface coincide with the line between the pressing center (2) and the adjusting center (3), and ensuring that the processed arc surface is adapted to the grinding position of the grinding wheel on the grinding machine; 3) adjusting the height of the fork-shaped part, starting the grinding machine, rotating the rocker handle (23) to drive the arch-shaped frame (21) to rotate along the horizontal direction of the positioning shaft (27), and completing the grinding of the fork head arc surface of the fork-shaped part.

9. The method of claim 8, wherein, In the step 2), the angular position of the processed arc surface is determined by the V-shaped block (24) and the guide column (31), and the processed arc surface on the arch-shaped frame (21) is clamped by adjusting the axial height of the adjusting screw (13); In the step 3), the arch-shaped frame (21) is limited in the rotating angle by the stop block (8) during the horizontal rotation.

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