A processing tooling for bowl-shaped parts

Abstract

The present invention relates to a processing tooling for bowl-shaped parts, which includes a pressing ring U-shaped structural member, a guiding cross pin, an adjusting stud and a fixed shaft seat. The fixed shaft seat includes a base and a positioning seat. A longitudinal stud hole and a transverse pin hole which are communicated with each other are formed in the positioning seat. The adjusting stud consists of an upper large-thread section and a lower small-cylindrical section. The lower small-cylindrical section of the adjusting stud passes through the guiding cross pin. A retaining ring is sleeved on the lower small-cylindrical section of the adjusting stud, and a retaining ring locating pin is further arranged below the retaining ring. The adjusting stud is installed in the longitudinal stud hole of the positioning seat and is threadedly connected with the longitudinal stud hole. The guiding cross pin is located in the transverse pin hole of the positioning seat, and both ends of the guiding cross pin extend out of the outer side of the positioning seat. The pressing ring U-shaped structural member is composed of a top ring and two clamping plates, and clamping openings for clamping the guiding cross pin are formed in the clamping plates. This tooling has a simple structure, is easy to clamp, has high positioning accuracy, small clamping deformation and a large number of machining contents, and can meet most of the requirements for machining bowl-shaped thin-walled parts.

Description

Technical Field

[0001] The present invention relates to a clamping and positioning tooling for part processing, and particularly to a processing tooling for bowl-shaped parts. Background Art

[0002] In the current processing of bowl-shaped thin-walled parts, most processes select the bowl-shaped surface for final finishing and clamp it in a one-top-one-clamp manner. Existing clamping toolings applicable to the processing of bowl-shaped thin-walled parts have unreasonable structural designs, with large limitations. They are prone to causing the bowl-shaped thin-walled parts to be deformed under force during the processing and clamping process, resulting in many quality problems such as out-of-tolerance of machining dimensions and geometric tolerances. In addition, the content that can be processed in one clamping is small, and multiple clamps are required for processing, which has the disadvantages of low production efficiency, poor positioning coincidence accuracy, and artificial introduction of machining errors. Therefore, it is necessary to develop a more reasonable clamping tooling applicable to the processing of bowl-shaped thin-walled parts to meet the requirements in the processing of bowl-shaped thin-walled parts. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a processing tooling for bowl-shaped parts, which has a simple structure, is easy to clamp, has high positioning accuracy, small clamping deformation, and a large amount of processing content, and can meet most of the requirements for processing bowl-shaped thin-walled parts.

[0004] The technical solution for solving the above technical problem is: a processing tooling for bowl-shaped parts, including a pressing ring gantry structure member, a guiding cross pin, an adjusting stud, and a fixed shaft seat. The fixed shaft seat includes a base and a positioning seat connected to the upper end of the base. The top end of the positioning seat is the supporting end for the bowl-shaped part. A longitudinally threaded hole and a laterally pin hole that communicate with each other are opened in the positioning seat. The longitudinally threaded hole penetrates the top surface of the positioning seat. The adjusting stud is composed of an upper large-thread section and a lower small-cylindrical section. The lower small-cylindrical section of the adjusting stud passes through the guiding cross pin. A retaining ring is sleeved on the adjusting stud below the guiding cross pin, and a retaining ring positioning pin is also provided on the adjusting stud below the retaining ring. The adjusting stud is installed in the longitudinally threaded hole of the positioning seat, and the upper large-thread section of the adjusting stud is threadedly connected to the longitudinally threaded hole. The guiding cross pin is located in the laterally pin hole of the positioning seat, and both ends of the guiding cross pin extend out of the outside of the positioning seat. The pressing ring gantry structure member is composed of a top ring for pressing the bowl-shaped part and two clamping plates connected below the top ring. A bayonet for clamping the guiding cross pin is opened on the clamping plate.

[0005] A rotation connection groove is opened at the top end of the adjusting stud.

[0006] The cross-sectional shape of the laterally pin hole is a long strip with arc-shaped upper and lower ends.

[0007] The supporting end of the bowl-shaped part of the positioning seat is, from top to bottom, a hollow cylindrical section, a conical section, and an annular supporting platform for supporting the edge of the bowl-shaped part.

[0008] The guide cross pin is also provided with a flat groove which contacts the bottom end of the upper large thread section of the adjusting stud.

[0009] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0010] 1. The bowl-shaped part is pressed against the fixed shaft seat by a pressure ring gate-shaped structural part. The pressure ring gate-shaped structural part adopts a rotationally symmetrical structural design, which consists of a top circular ring and two clamping plates with bayonet holes. The size of the top circular ring is determined comprehensively according to the large end size and the small end avoidance size of the bowl-shaped part to be processed, and the pressing contact surface is designed in combination with the shape of the bowl-shaped part. The pressure ring gate-shaped structural part has a small contact surface when pressing the bowl-shaped part, and has less obstruction to the bowl-shaped part. Most of the processing parts of the bowl-shaped part can be completed by clamping it once, while ensuring high positioning accuracy and production efficiency. Compared with other existing clamping methods, the clamping deformation is greatly reduced.

[0011] 2. The clamping assembly used to drive the pressure ring gate-shaped structure to clamp the bowl-shaped part includes an adjusting stud and a guide cross pin. The adjusting stud cooperates with the inner threaded hole of the fixed shaft seat and can move up and down to drive the guide cross pin so that the pressure ring gate-shaped structure clamps the bowl-shaped part; the structure is simple and easy to clamp.

[0012] 3. The pressure ring gate-shaped structural parts are evenly stressed when pressing the bowl-shaped parts, reducing the vibration caused by the changes in internal stress during the cutting process; the clamping force direction is the same as the design direction of the tooling positioning, which greatly improves the coaxiality, roundness and other accuracy of the processing content and the positioning part, thereby greatly improving the production quality qualification rate.

[0013] Below, the technical features of a bowl-shaped parts processing tool of the present invention are further explained in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : A front view of a bowl-shaped parts processing tooling in use according to the present invention.

[0015] Figure 2 : A sectional view of a bowl-shaped parts processing tooling in use according to the present invention.

[0016] Figure 3 : A three-dimensional diagram of the use status of a bowl-shaped parts processing tooling of the present invention.

[0017] Figure 4 : A three-dimensional diagram of the fixed axle seat of the present invention.

[0018] Figure 5 : A three-dimensional diagram of the pressure ring door-shaped structural member of the present invention.

[0019] Figure 6 : Schematic diagram of the connection between the adjusting stud and the guide cross pin of the present invention.

[0020] Figure 7 : Top view of the fixed shaft seat of the present invention.

[0021] Figure 8 : Figure 7 A - A cross - sectional view of

[0022] Figure 9 : Figure 7 B - B cross - sectional view of

[0023] Figure 10 : Perspective view of the guiding cross pin of the present invention. Detailed implementation manner

[0024] Embodiment: A processing tooling for bowl - shaped parts, as Figures 1 - 10 shown, includes a pressing ring U - shaped structural member 1, a guiding cross pin 2, an adjusting stud 4 and a fixed shaft seat 3. The fixed shaft seat includes a base 32 and a positioning seat 31 connected to the upper end of the base. The top of the positioning seat 31 is the supporting end for the bowl - shaped part. The supporting end for the bowl - shaped part from top to bottom is a hollow cylindrical section 311, a conical section 312 and an annular supporting platform 313 for supporting the edge of the bowl - shaped part. A longitudinally threaded stud hole 314 and a laterally - positioned pin hole 315 that communicate with each other are formed in the positioning seat. The longitudinally threaded stud hole 314 penetrates through the top surface of the positioning seat. The adjusting stud 4 is composed of an upper large - threaded section 42 and a lower small cylindrical section 43. A rotation connection groove 41 is formed at the top of the upper large - threaded section 42 of the adjusting stud. The lower small cylindrical section 43 of the adjusting stud passes through the guiding cross pin. A retaining ring 5 is sleeved on the lower small cylindrical section of the adjusting stud below the guiding cross pin 2. A retaining ring positioning pin 6 is further provided on the lower small cylindrical section of the adjusting stud below the retaining ring. The retaining ring positioning pin 6 passes through the lower small cylindrical section 43 of the adjusting stud to support the retaining ring 5. The adjusting stud 4 is installed in the longitudinally threaded stud hole 314 of the positioning seat. The upper large - threaded section 42 of the adjusting stud is threadedly connected to the longitudinally threaded stud hole 314. The adjusting stud 4 can move up and down in the longitudinally threaded stud hole 314 of the positioning seat. The guiding cross pin 2 is located in the laterally - positioned pin hole 315 of the positioning seat. Both ends of the guiding cross pin 2 extend out of the outside of the positioning seat 31. The guiding cross pin 2 can move up and down in the laterally - positioned pin hole 315 of the positioning seat under the drive of the adjusting stud 4. The pressing ring U - shaped structural member 1 is composed of a top ring 11 for pressing the bowl - shaped part and two clamping plates 12 connected to the lower part of the top ring. A bayonet 13 for clamping the guiding cross pin is formed on the clamping plate. In the working state, the bowl - shaped part P is placed on the supporting end for the bowl - shaped part of the positioning seat 31. The top ring 11 of the pressing ring U - shaped structural member 1 presses the bowl - shaped part P. Both ends of the guiding cross pin 2 are respectively located in the bayonets 13 of the two clamping plates 12. The through - hole in the top ring 11 of the pressing ring U - shaped structural member 1 avoids passing through the small end of the bowl - shaped part P, so that the top ring 11 is in spherical contact with the large - end spherical surface of the bowl - shaped part P, and the U - shaped symmetric bayonets 13 of the pressing ring U - shaped structural member 1 are buckled together with the guiding cross pin 2.

[0025] In this embodiment, the cross-sectional shape of the horizontal pin hole is a long strip with arc-shaped upper and lower ends. A flat groove 21 is further provided on the guiding cross pin and is in contact with the bottom end of the upper large-threaded section of the adjusting stud.

[0026] Working process: Install and align the present invention on machine tool equipment. If it is a turning-milling compound machine tool, clamp the lower clamping position of the fixed shaft seat onto the chuck spindle, and use a dial indicator or a micrometer to correct the rotational runout value of the positioning cylindrical surface of the fixed shaft seat to be less than 0.01 mm, or correct it according to actual requirements; if it is on a five-axis machining center machine tool, clamp the fixed shaft seat with a three-jaw chuck fixed on the machine tool, and use a dial indicator or a micrometer to align the center of the upper positioning cylindrical surface of the fixed shaft seat with the center of the machining center spindle so that the rotational runout value is less than 0.01 mm, and set the center of the workpiece coordinate system. Then install and clamp the workpiece. Rotate the adjusting stud 4 upwards to move the guiding cross pin 2 to a suitable position, insert the bowl-shaped part P into the upper end of the fixed shaft seat 3, then pass the pressing ring portal structure part 1 through the bowl-shaped part P, and appropriately rotate the pressing ring portal structure part 1 so that the two side bayonets are aligned with the guiding cross pin 2 and fitted in. Then insert an external hexagonal wrench through the bowl-shaped part P into the rotational connection groove 41, and rotate the adjusting stud 4 downwards so that the guiding cross pin 2 drives the pressing ring portal structure part 1 downwards to press the bowl-shaped part P to meet the corresponding usage requirements.

Claims

1. A processing tooling for bowl-shaped parts, characterized in that: It includes a pressing ring gantry structure member (1), a guiding cross pin (2), an adjusting stud (4) and a fixed shaft seat (3). The fixed shaft seat includes a base (32) and a positioning seat (31) connected to the upper end of the base. The top end of the positioning seat is a bowl-shaped part supporting end. A longitudinally threaded stud hole (314) and a laterally positioned pin hole (315) that communicate with each other are formed in the positioning seat. The longitudinally threaded stud hole penetrates the top surface of the positioning seat. The adjusting stud is composed of an upper large-thread section (42) and a lower small cylindrical section (43). The lower small cylindrical section of the adjusting stud passes through the guiding cross pin. A retaining ring (5) is sleeved on the adjusting stud below the guiding cross pin. A retaining ring positioning pin (6) is further provided on the adjusting stud below the retaining ring. The adjusting stud is installed in the longitudinally threaded stud hole of the positioning seat. The upper large-thread section of the adjusting stud is threadedly connected to the longitudinally threaded stud hole. The guiding cross pin is located in the laterally positioned pin hole of the positioning seat. Both ends of the guiding cross pin extend out of the outside of the positioning seat. The pressing ring gantry structure member (1) is composed of a top ring (11) for pressing the bowl-shaped part and two clamping plates (12) connected below the top ring. A bayonet (13) for clamping the guiding cross pin is formed in the clamping plate; The cross-sectional shape of the laterally positioned pin hole is a long strip with arc-shaped upper and lower ends; The bowl-shaped part supporting end of the positioning seat is successively a hollow cylindrical section (311), a conical section (312) and an annular supporting platform (313) for supporting the edge of the bowl-shaped part from top to bottom.

2. The processing tooling for a bowl-shaped part according to claim 1, wherein: A rotation connection groove (41) is formed at the top end of the adjusting stud.

3. The processing tooling for a bowl-shaped part according to claim 1 or 2, characterized in that: A flat groove (21) in contact with the bottom end of the upper large-thread section of the adjusting stud is further provided on the guiding cross pin.

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