A turning clamping tool for a special-shaped shell and a turning method thereof

Abstract

The present application relates to a kind of turning clamping tool for special-shaped shell and its turning method, belong to turning processing technical field;Including turning clamping tool including fixed block, pressing plate, two locking bolts, gasket;A upper fixed groove and a lower fixed groove are provided in the front end surface of fixed block, upper fixed groove is located in the upper end middle part of lower fixed groove, the upper end opening of upper fixed groove is kept in communication with the upper end surface of fixed block, and the lower end opening of upper fixed groove is communicated with lower fixed groove;A pressing plate is provided on the upper end surface of fixed block, and the pressing plate is fixedly connected with fixed block by two bolts;Gasket is arranged at the bottom surface inside lower fixed groove;Using a turning clamping tool can be turned to the inner cavity thread hole and nozzle of special-shaped shell, simultaneously without causing damage to the outer surface of special-shaped shell;Solve the problem of easy damage to outer surface when using traditional clamping method to process special-shaped shell, positioning accuracy is not high.

Description

Technical Field

[0001] This invention belongs to the field of turning technology, specifically relating to a turning fixture for irregularly shaped shells and its turning method. Background Technology

[0002] The irregularly shaped shell includes a large cylindrical segment 1, a small cylindrical segment 3, and a square column segment 2. The large cylindrical segment 1 and the small cylindrical segment 3 are coaxially arranged, and the outer diameter of the small cylindrical segment 3 is smaller than the outer diameter of the large cylindrical segment 1. The square column segment 2 is located between the small cylindrical segment 3 and the large cylindrical segment 1. The front side of the square column segment 2 is an arc surface, and the arc surface of the front side of the square column segment 2 coincides with the outer side of the large cylindrical segment 1. The left, right, and rear sides of the square column segment 2 are all planes, and are all located inside the outer edge of the end face of the large cylindrical segment 1. The left and right sides are located in the vertical plane in the front-back direction, and the rear side is located in the vertical plane in the left-right direction. The small cylindrical segment 3 is located inside the outer edge of the end face of the square column segment 2. An internal threaded hole 5 is provided on the front arc surface of the square column section 2. The axis of the internal threaded hole 5 is horizontally arranged along the front and back and is parallel to the radial direction of the large cylindrical section 1. A cylindrical nozzle 4 is provided on the rear plane of the square column section 2. The axis of the nozzle 4 is horizontally arranged along the front and back and is parallel to the radial direction of the large cylindrical section 1. There is a gap between the height of the internal threaded hole 5 and the height of the nozzle 4.

[0003] When machining the aforementioned irregularly shaped shell using conventional clamping methods for the nozzle 4 and the internal threaded hole 5, the first consideration is how to clamp the part for machining. Since the part is cylindrical, alignment is required on the cylindrical surface to confirm the center distance between the holes. Using a three-jaw clamp is difficult to align the positioning reference and is also inconvenient for clamping, and the outer surface of the part cannot be damaged. The geometric accuracy and form and position tolerances of the part cannot be guaranteed, making machining accuracy difficult to ensure. Using a four-jaw clamp would leave clamping marks on the outer surface of the part, affecting the appearance quality; furthermore, the lower threaded combination hole requires rotary milling and boring, requiring repeated positioning, making accuracy difficult to guarantee, severely impacting production efficiency, and increasing machining costs. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and proposes a turning fixture and turning method for irregularly shaped shells; it solves the problems of easy damage to the outer surface and low positioning accuracy when using traditional clamping methods to process irregularly shaped shells.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0006] A turning clamping fixture for irregularly shaped shells includes a fixing block, a pressure plate, two locking bolts, and a washer. The fixing block is a square block structure with an upper fixing groove and a lower fixing groove on its front end face. The upper fixing groove is located at the upper middle of the lower fixing groove, and its upper opening is connected to the upper end face of the fixing block. The lower opening of the upper fixing groove is connected to the lower fixing groove. A pressure plate is provided on the upper end face of the fixing block and is fixedly connected to the fixing block by two bolts. The washer is located at the bottom of the lower fixing groove.

[0007] Furthermore, the lower fixing groove is a square groove, and the inner bottom surface of the lower fixing groove remains horizontal.

[0008] Furthermore, the upper fixing groove is a square groove, and the left and right inner walls of the upper fixing groove remain vertical.

[0009] Furthermore, a nozzle clearance hole is provided on the rear inner wall of the upper fixing groove, and the nozzle clearance hole is in communication with the rear end face of the fixing block.

[0010] Furthermore, two threaded holes are provided on the upper end face of the fixing block, and the two threaded holes are symmetrical about the upper fixing groove.

[0011] Furthermore, the pressure plate is a horizontally arranged square plate structure, with two vertically downward locking bolts screwed onto the pressure plate. The two locking bolts are respectively screwed into the two threaded holes at the upper end of the fixing block, thereby fixing the pressure plate onto the fixing block.

[0012] Furthermore, the gasket is a horizontally arranged square plate structure, with the upper end face of the gasket parallel to the inner bottom surface of the lower fixing groove.

[0013] A turning method for a turning fixture used for irregularly shaped housings, wherein when machining the nozzle of the irregularly shaped housing, the irregularly shaped housing is placed inside a fixing block, wherein the large cylindrical section of the irregularly shaped housing is located inside the lower fixing groove, and the square column section and the small cylindrical section of the irregularly shaped housing are located inside the upper fixing groove. The nozzle on the irregularly shaped housing faces the outer opening of the upper fixing groove, and the threaded hole in the inner cavity of the irregularly shaped housing faces the rear inner wall of the upper fixing groove. The end face of the large cylindrical section is in close contact with the inner bottom surface of the lower fixing groove, and the end face of the small cylindrical section extends to the upper end of the upper fixing groove. On the outside of the opening, the lower end face of the pressure plate contacts the end face of the small cylindrical section. The pressure plate is fixedly connected to the fixing block by two locking bolts. The lower bottom surface of the fixing groove on the lower side of the fixing block and the lower end face of the pressure plate limit and fix the irregular shell in the vertical direction. The left and right sides of the square column section contact the left and right inner walls of the upper fixing groove, respectively. The left and right inner walls of the upper fixing groove limit and fix the irregular shell in the horizontal direction. The entire machining fixture is fixed on the CNC lathe by a four-jaw chuck, so that the nozzle can be machined.

[0014] When machining the threaded hole inside the irregularly shaped shell, the irregularly shaped shell is placed inside the fixing block. The large cylindrical section of the irregularly shaped shell is located inside the lower fixing groove, while the square column section and the small cylindrical section are located inside the upper fixing groove. The nozzle on the irregularly shaped shell extends into the nozzle clearance hole on the rear inner wall of the upper fixing groove. The threaded hole inside the irregularly shaped shell faces the outer opening of the upper fixing groove. A gasket is placed on the inner bottom surface of the lower fixing groove. The end face of the large cylindrical section is in close contact with the upper end face of the gasket, and the end face of the small cylindrical section extends out to the upper fixing groove. On the outer side of the upper opening of the fixed groove, the lower end face of the pressure plate contacts the end face of the small cylindrical section. The pressure plate is fixedly connected to the fixing block by two locking bolts. The upper end face of the gasket and the lower end face of the pressure plate limit and fix the irregular shell in the vertical direction. The left and right sides of the square column section contact the left and right inner walls of the upper fixed groove, respectively. The left and right inner walls of the upper fixed groove limit and fix the irregular shell in the horizontal direction. The entire machining fixture is fixed on the CNC lathe by a four-jaw chuck, so as to machine the internal threaded hole.

[0015] Furthermore, the four claws are respectively engaged with the left side, right side, bottom side, and upper surface of the pressure plate of the fixing block.

[0016] Furthermore, since there is a height difference between the nozzle and the internal threaded hole, a shim is used to compensate for the height difference of the internal threaded hole. The compensated internal threaded hole is located at the axis of the four-jaw chuck.

[0017] The beneficial effects of this invention compared to the prior art are as follows:

[0018] The present invention provides a turning fixture and turning method for irregularly shaped shells. By designing a turning fixture specifically for irregularly shaped shells, the irregularly shaped shell is first fixed inside the turning fixture, and then the turning fixture is fixed on a CNC lathe. The turning fixture uses surface contact when fixing the irregularly shaped shell, so as not to damage the outer surface of the irregularly shaped shell during clamping. By designing shims, the height difference between the internal threaded hole and the nozzle can be compensated, thus achieving the effect of a dual-purpose fixture, realizing the purpose of turning instead of milling, ensuring machining accuracy, and improving efficiency. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings:

[0020] Figure 1 It is a three-dimensional diagram of an irregularly shaped shell. Figure 1 ;

[0021] Figure 2 It is a three-dimensional diagram of an irregularly shaped shell. Figure 2 ;

[0022] Figure 3 It is a cross-sectional view of an irregularly shaped shell;

[0023] Figure 4 This is a schematic diagram of the turning clamping fixture;

[0024] Among them, 1 is the large cylindrical section, 2 is the square cylindrical section, 3 is the small cylindrical section, 4 is the nozzle, 5 is the internal threaded hole, 6 is the fixing block, 7 is the upper fixing groove, 8 is the lower fixing groove, 9 is the pressure plate, 10 is the locking bolt, 11 is the gasket, and 12 is the nozzle clearance hole. Detailed Implementation

[0025] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0026] like Figure 1 As shown in Figure 4, the present invention provides a turning clamping fixture and a turning method for irregularly shaped shells, which clamps the irregularly shaped shells and then processes the nozzle 4 and the internal threaded hole 5 of the irregularly shaped shells.

[0027] The turning clamping fixture includes a fixing block 6, a pressure plate 9, two locking bolts 10, and a washer 11.

[0028] The fixing block 6 is a square block structure. An upper fixing groove 7 and a lower fixing groove 8 are provided on the front end face of the fixing block 6. The upper fixing groove 7 is located at the upper center of the lower fixing groove 8. The lower fixing groove 8 is a square groove, and its inner bottom surface remains horizontal. The upper fixing groove 7 is a square groove, and its left and right inner walls remain vertical. The upper opening of the upper fixing groove 7 communicates with the upper end face of the fixing block 6, and its lower opening communicates with the lower fixing groove 8. A nozzle clearance hole 12 is provided on the rear inner wall of the upper fixing groove 7, and the nozzle clearance hole 12 communicates with the rear end face of the fixing block 6. Two threaded holes are provided on the upper end face of the fixing block 6, and the two threaded holes are symmetrical about the upper fixing groove 7.

[0029] The pressure plate 9 is a horizontally arranged square plate structure. Two vertically downward locking bolts 10 are screwed onto the pressure plate 9. The two locking bolts 10 are respectively screwed into the two threaded holes at the upper end of the fixing block 6, thereby fixing the pressure plate 9 onto the fixing block 6.

[0030] The gasket 11 is a horizontally arranged square plate structure. The gasket 11 is located on the inner bottom surface of the lower fixing groove 8, and the upper end surface of the gasket 11 is parallel to the inner bottom surface of the lower fixing groove 8.

[0031] When processing the nozzle 4 of the irregular shell, the irregular shell is placed inside the fixing block 6, wherein the large cylindrical section 1 of the irregular shell is located inside the lower fixing groove 8, the square column section 2 and the small cylindrical section 3 of the irregular shell are located inside the upper fixing groove 7, the nozzle 4 on the irregular shell faces the outer opening of the upper fixing groove 7, and the internal threaded hole 5 on the irregular shell faces the rear inner wall of the upper fixing groove 7.

[0032] The end face of the large cylindrical segment 1 is in close contact with the inner bottom surface of the lower fixing groove 8. The end face of the small cylindrical segment 3 extends to the outer side of the upper opening of the upper fixing groove 7. The lower end face of the pressure plate 9 is in contact with the end face of the small cylindrical segment 3. The pressure plate 9 is fixedly connected to the fixing block 6 by two locking bolts 10. The lower bottom surface of the fixing groove 8 of the fixing block 6 and the lower end face of the pressure plate 9 limit and fix the irregular shell in the vertical direction. The left and right sides of the square column segment 2 are in contact with the left and right inner walls of the upper fixing groove 7, respectively. The left and right inner walls of the upper fixing groove 7 limit and fix the irregular shell in the horizontal direction.

[0033] The entire turning fixture is fixed on the CNC lathe by a four-jaw chuck. The four jaws are respectively engaged with the left side, right side, bottom side and upper end of the pressure plate 9 of the fixing block 6. The turning fixture is rotated by the four-jaw chuck to turn the nozzle 4.

[0034] When machining the internal threaded hole 5 of the irregular shell, the irregular shell is placed inside the fixing block 6, wherein the large cylindrical section 1 of the irregular shell is located inside the lower fixing groove 8, the square column section 2 and the small cylindrical section 3 of the irregular shell are located inside the upper fixing groove 7, the nozzle 4 on the irregular shell extends into the nozzle clearance hole 12 on the rear inner wall of the upper fixing groove 7, and the internal threaded hole 5 on the irregular shell faces the outer opening of the upper fixing groove 7.

[0035] A gasket 11 is placed on the bottom surface of the lower fixing groove 8. The end face of the large cylindrical section 1 is in close contact with the upper end face of the gasket 11. The end face of the small cylindrical section 3 extends to the outside of the upper opening of the upper fixing groove 7. The lower end face of the pressure plate 9 is in contact with the end face of the small cylindrical section 3. The pressure plate 9 is fixedly connected to the fixing block 6 by two locking bolts 10. The upper end face of the gasket 11 and the lower end face of the pressure plate 9 limit and fix the irregular shell in the vertical direction. The left and right sides of the square column section 2 are in contact with the left and right inner walls of the upper fixing groove 7, respectively. The left and right inner walls of the upper fixing groove 7 limit and fix the irregular shell in the horizontal direction.

[0036] Since there is a height difference between the nozzle 4 and the internal threaded hole 5, the height difference of the internal threaded hole 5 is compensated by the shim 11. The compensated internal threaded hole 5 is located at the axis of the four-jaw chuck.

[0037] The entire turning fixture is fixed on the CNC lathe by a four-jaw chuck. The four jaws are respectively engaged with the left side, right side, bottom side and upper end of the pressure plate 9 of the fixing block 6. The turning fixture is rotated by the four-jaw chuck to turn the internal threaded hole 5.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A turning fixture for irregularly shaped housings, characterized in that: The irregular shell includes a large cylindrical segment (1), a small cylindrical segment (3), and a square column segment (2). The large cylindrical segment (1) and the small cylindrical segment (3) are coaxially arranged. The outer diameter of the small cylindrical segment (3) is smaller than the outer diameter of the large cylindrical segment (1). The square column segment (2) is located between the small cylindrical segment (3) and the large cylindrical segment (1). The front side of the square column segment (2) is an arc surface, and the arc surface of the front side of the square column segment (2) coincides with the outer side of the large cylindrical segment (1). The left side, right side, and rear side of the square column segment (2) are all flat and are all located inside the outer edge of the end face of the large cylindrical segment (1). Located within the vertical plane in the front-back direction, and the rear side is located within the vertical plane in the left-right direction; the small cylindrical segment (3) is located inside the outer edge of the end face of the square column segment (2), and an inner threaded hole (5) is provided on the front arc surface of the square column segment (2). The axis of the inner threaded hole (5) is set horizontally along the front and back and is parallel to the radial direction of the large cylindrical segment (1); a cylindrical nozzle (4) is provided on the rear side plane of the square column segment (2). The axis of the nozzle (4) is set horizontally along the front and back and is parallel to the radial direction of the large cylindrical segment (1); there is a gap between the height of the inner threaded hole (5) and the height of the nozzle (4); The turning clamping fixture includes a fixing block (6), a pressure plate (9), two locking bolts (10), and a washer (11). The fixing block (6) is a square block structure. An upper fixing groove (7) and a lower fixing groove (8) are provided on the front end face of the fixing block (6). The upper fixing groove (7) is located in the middle of the upper end of the lower fixing groove (8). The upper opening of the upper fixing groove (7) is connected to the upper end face of the fixing block (6), and the lower opening of the upper fixing groove (7) is connected to the lower fixing groove (8). A pressure plate (9) is provided on the upper end face of the fixing block (6). The pressure plate (9) is fixedly connected to the fixing block (6) by two bolts. The washer (11) is provided on the bottom surface inside the lower fixing groove (8). A nozzle clearance hole (12) is provided on the rear inner wall of the upper fixing groove (7). The nozzle clearance hole (12) is connected to the rear end face of the fixing block (6).

2. The turning clamping fixture for irregularly shaped shells according to claim 1, characterized in that: The lower fixing groove (8) is a square groove, and the bottom surface of the lower fixing groove (8) remains horizontal.

3. The turning clamping fixture for irregularly shaped shells according to claim 1, characterized in that: The upper fixing groove (7) is a square groove, and the left and right inner walls of the upper fixing groove (7) remain vertical.

4. A turning fixture for irregularly shaped housings according to claim 1, characterized in that: Two threaded holes are provided on the upper end face of the fixing block (6), and the two threaded holes are symmetrical about the upper fixing groove (7).

5. A turning fixture for irregularly shaped housings according to claim 4, characterized in that: The pressure plate (9) is a horizontally arranged square plate structure. Two vertically downward locking bolts (10) are screwed onto the pressure plate (9). The two locking bolts (10) are respectively screwed into the two threaded holes at the upper end of the fixing block (6), thereby fixing the pressure plate (9) onto the fixing block (6).

6. A turning clamping fixture for irregularly shaped shells according to claim 1, characterized in that: The gasket (11) is a horizontally arranged square plate structure, and the upper end surface of the gasket (11) is parallel to the inner bottom surface of the lower fixing groove (8).

7. A turning method for a turning fixture for irregularly shaped shells according to any one of claims 1-6, characterized in that: When processing the nozzle (4) of the irregular shell, the irregular shell is placed inside the fixing block (6), wherein the large cylindrical section (1) of the irregular shell is located inside the lower fixing groove (8), and the square column section (2) and the small cylindrical section (3) of the irregular shell are located inside the upper fixing groove (7). The nozzle (4) on the irregular shell faces the outer opening of the upper fixing groove (7), and the internal threaded hole (5) on the irregular shell faces the rear inner wall of the upper fixing groove (7). The end face of the large cylindrical section (1) is in close contact with the inner bottom surface of the lower fixing groove (8), and the end face of the small cylindrical section (3) extends to the outer side of the upper opening of the upper fixing groove (7). The lower end face of the plate (9) is in contact with the end face of the small cylindrical section (3). The pressure plate (9) is fixedly connected to the fixing block (6) by two locking bolts (10). The lower bottom surface of the fixing groove (8) of the fixing block (6) and the lower end face of the pressure plate (9) limit the vertical direction of the irregular shell. The left and right sides of the square column section (2) are in contact with the inner walls of the left and right sides of the upper fixing groove (7). The horizontal direction of the irregular shell is limited by the inner walls of the left and right sides of the upper fixing groove (7). The entire machining fixture is fixed on the CNC lathe by the four-jaw chuck, so that the nozzle (4) can be machined. When machining the internal threaded hole (5) of the irregular shell, the irregular shell is placed inside the fixing block (6), wherein the large cylindrical section (1) of the irregular shell is located inside the lower fixing groove (8), the square column section (2) and the small cylindrical section (3) of the irregular shell are located inside the upper fixing groove (7), the nozzle (4) on the irregular shell extends into the nozzle clearance hole (12) on the rear inner wall of the upper fixing groove (7), and the internal threaded hole (5) on the irregular shell faces the outer opening of the upper fixing groove (7); a gasket (11) is set at the bottom of the lower fixing groove (8), and the end face of the large cylindrical section (1) is flush with the gasket. (11) The upper end face is kept in close contact. The end face of the small cylindrical section (3) extends to the outside of the upper opening of the upper fixing groove (7). The lower end face of the pressure plate (9) is in contact with the end face of the small cylindrical section (3). The pressure plate (9) is fixedly connected to the fixing block (6) by two locking bolts (10). The upper end face of the gasket (11) and the lower end face of the pressure plate (9) limit the vertical direction of the irregular shell. The left and right sides of the square column section (2) are in contact with the left and right inner walls of the upper fixing groove (7) respectively. The left and right inner walls of the upper fixing groove (7) limit the horizontal direction of the irregular shell. The entire machining fixture is fixed on the CNC lathe by a four-jaw chuck, so that the internal thread hole (5) can be machined.

8. A turning method for a turning fixture for irregularly shaped shells according to claim 7, characterized in that: The four claws are respectively engaged with the left side of the fixing block (6), the right side of the fixing block (6), the bottom side of the fixing block (6), and the top side of the pressure plate (9).

9. A turning method for a turning fixture for irregularly shaped shells according to claim 7, characterized in that: Since there is a height difference between the nozzle (4) and the internal threaded hole (5), the height difference of the internal threaded hole (5) is compensated by a gasket (11), and the compensated internal threaded hole (5) is located at the axis of the four-jaw chuck.

Images