Thin-wall annular workpiece machining clamp

Abstract

The utility model provides a thin-wall annular workpiece machining clamp which comprises a machining base and a positioning disc, the bottom of the machining base has the Morse taper coaxial with a turning tool machining center, and the positioning disc is movably installed on the surface of the machining base through a horizontal floating assembly. And a limiting assembly and a fixing and pressing assembly for limiting horizontal movement and vertical movement of the to-be-machined part are mounted on the positioning disc correspondingly. According to the utility model, the horizontal floating assembly can be used for finely adjusting the positioning disc on which the to-be-processed part is mounted, so that the center of the to-be-processed part returns to the processing center of the turning tool again, the processing deviation generated by the deformed annular part is avoided, and the processing qualification rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of annular piece processing, in particular to a thin-walled annular workpiece processing fixture. Background Art

[0002] Existing sealing ring parts, with an average thickness of 3-5mm, are thin-walled workpieces. Before and after the processing of the inner and outer rings, material deformation is prone to occur, causing the center of the part to be processed to deviate from the center of the turning tool's circular processing, thereby affecting the processing quality of the part. At the same time, for the same group of sealing rings with many types, small batches and high coaxiality requirements, the current processing requires multiple replacement of fixtures to adapt to the type of sealing rings, increasing processing costs. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies of the existing technology, the utility model provides a thin-walled annular workpiece processing fixture, which ensures that the center of the part to be processed is located at the processing center of the turning tool, improves the processing quality; adapts to the processing needs of workpieces of different sizes, and saves processing costs.

[0004] The technical solution of this utility model is a thin-walled annular workpiece machining fixture comprising a machining base and a positioning plate. The base has a Morse taper at its bottom, coaxial with the lathe tool's machining center. The positioning plate is movably mounted on the surface of the machining base via a horizontal floating assembly. A limit assembly and a pressure assembly are mounted on the positioning plate, respectively, to restrict the horizontal and vertical movement of the workpiece to be machined. The limit assembly and pressure assembly ensure the secure mounting of the workpiece on the positioning plate, while the horizontal floating assembly allows for fine-tuning of the positioning plate after the workpiece is mounted, thereby realigning the workpiece's center with the lathe tool's machining center. This prevents machining deviations that may occur with deformed annular parts and improves the machining pass rate.

[0005] The processing base is provided with a plurality of adjustment holes along the circumference, and the horizontal floating assembly includes a positioning bolt and a positioning nut. One end of the positioning bolt is fixed to the bottom of the positioning plate, and the other end of the positioning bolt passes through the adjustment hole and is threadedly connected to the positioning nut. There is an annular adjustment gap between the adjustment hole and the positioning bolt.

[0006] The positioning plate is provided with several positioning hole groups along the circumferential direction, and each positioning hole group includes several positioning holes arranged at intervals along the radial direction. The limiting component is a positioning pin, one end of the positioning pin cooperates with the positioning hole, and the outer side of the other end of the positioning pin forms a limiting surface that contacts the inner ring surface / outer ring surface of the part to be processed.

[0007] The positioning plate is circumferentially provided with several threaded hole groups, each of which includes several threaded holes spaced radially apart. The fixing and pressing assembly comprises a pressure plate, one end of which presses against the end face of the part to be machined. A stud bolt, which engages with the threaded holes, penetrates the other end of the plate. A locking nut and a pressure nut are attached to the stud bolts above and below the plate, respectively. The design of the positioning and threaded hole groups allows for the machining of annular parts of various sizes, reducing processing costs.

[0008] There are two stud bolts corresponding to the same pressing plate, and a strip hole for the stud bolts to slide is opened at the penetrating position of the pressing plate.

[0009] The shortest distance between adjacent positioning holes in the same positioning hole group is equal to the thickness of the part to be processed.

[0010] The beneficial effects of the present invention are as follows: the present invention can fine-tune the positioning plate on which the part to be processed is installed through the horizontal floating component, thereby returning the center of the part to be processed to the processing center of the turning tool, avoiding the processing deviation caused by the deformed annular part and improving the processing qualification rate; the adjustable setting of the limit component and the fixed pressure component can cooperate with the processing of annular parts of various sizes, saving processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the utility model from another angle;

[0013] Figure 3 This is a cross-sectional schematic diagram of the utility model when it is used for machining the outer circle of the part to be machined;

[0014] Figure 4 It is a cross-sectional schematic diagram of the utility model when it is used for machining the inner circle of a part to be machined.

[0015] Figure numerals: 1. Processing base; 101. Morse taper; 102. Adjustment hole; 2. Positioning plate; 201. Positioning hole; 202. Threaded hole; 3. Part to be processed; 4. Positioning bolt; 5. Positioning nut; 6. Pressure plate; 7. Stud bolt; 8. Pressure nut; 9. Locking nut; 10. Positioning pin. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Other embodiments obtained by those skilled in the art without making any creative work should fall within the scope of protection of the present invention.

[0017] like Figure 1-Figure 4 As shown, the present invention provides a thin-walled annular workpiece processing fixture, comprising a processing base 1 and a positioning plate 2. The bottom of the processing base 1 has a Morse taper 101 coaxial with the lathe machining center to ensure the firmness and accuracy of the processing base 1 when assembled on the lathe machining center. The axis of the Morse taper 101 is the center of the entire processing base 1. The positioning plate 2 is movably mounted on the surface of the processing base 1 via a horizontal floating assembly. The positioning plate 2 is respectively mounted with a limit assembly and a fixed pressure assembly to limit the horizontal and vertical movement of the part 3 to be processed. The limit assembly and the fixed pressure assembly are used to fix the part 3 to be processed on the positioning plate 2. The positioning plate 2 with the part 3 to be processed installed is fine-tuned and installed via the horizontal floating assembly, thereby returning the center of the part 3 to be processed to the machining center of the lathe, avoiding processing deviations caused by deformed annular parts and improving the processing qualification rate.

[0018] Furthermore, the processing base 1 is provided with a plurality of adjustment holes 102 along the circumference. Preferably, in this embodiment, the number of the adjustment holes 102 is four, and the connecting lines between the two are arranged in a cross shape. The horizontal floating assembly includes a positioning bolt 4 and a positioning nut 5. One end of the positioning bolt 4 is fixed to the bottom of the positioning plate 2, and the other end of the positioning bolt 4 passes through the adjustment hole 102 and is threadedly connected to the positioning nut 5. There is an annular adjustment gap between the adjustment hole 102 and the positioning bolt 4, that is, the value of the annular adjustment gap is the difference between the radius of the adjustment hole 102 and the positioning bolt 4. In this embodiment, the annular adjustment gap is selected to be 1 mm.

[0019] Furthermore, the positioning disk 2 is provided with a plurality of positioning hole groups along the circumference. Preferably, in this embodiment, there are four positioning hole groups, symmetrically distributed in pairs on both sides of the center of the positioning disk 2. Each positioning hole group includes a plurality of positioning holes 201 spaced radially apart. The limiting assembly is a positioning pin 10, one end of which engages with the positioning hole 201, and the outer side of the other end of the positioning pin 10 forms a limiting surface that contacts the inner and outer annular surfaces of the part 3 to be processed. To facilitate switching between the inner and outer rings of the same part 3 to be processed, the closest distance between adjacent positioning holes 201 in the same positioning hole group is equal to the thickness of the part 3 to be processed.

[0020] Furthermore, the positioning disk 2 is provided with a plurality of threaded hole groups along the circumference, each threaded hole group including a plurality of threaded holes 202 spaced radially apart. Preferably, in this embodiment, there are two threaded hole groups, symmetrically distributed on either side of the center of the positioning disk 2. The fixing and pressing assembly is a pressure plate 6, one end of which is in pressurized contact with the end face of the part 3 to be machined. The other end of the pressure plate 6 is penetrated by a stud bolt 7 that engages with the threaded holes 202. A locking nut 9 and a pressure nut 8 are connected to the stud bolts 7 located above and below the pressure plate 6, respectively. Through the design of the positioning hole groups and threaded hole groups described above, when fitting annular parts of various sizes, it is only necessary to change the installation positions of the positioning pin 10 and stud bolt 7 on the positioning hole 201 and threaded hole 202, without having to replace the entire fixture, thus saving fixture costs.

[0021] Preferably, in order to improve the stability of the pressure plate 6 when it is fixed, there are two stud bolts 7 corresponding to the same pressure plate 6, and a strip hole for the stud bolts 7 to slide is opened at the through position of the pressure plate 6. The two stud bolts 7 on the same pressure plate 6 can be selected to cooperate with two adjacent or alternate threaded holes 202 according to the position.

[0022] When implementing this technical solution, the processing base 1 is installed in the spindle hole of the lathe through the Morse taper 101. At this time, the processing base 1 is coaxial with the lathe processing center, and the part 3 to be processed is placed on the surface of the positioning plate 2. Figure 3 As shown, the radial positioning of the part 3 to be processed is completed by cooperating the positioning pin 10 with the positioning hole 201 adapted to the size of the inner ring of the part 3 to be processed. At this time, the stud bolt 7 passes through the locking nut 9, the pressure plate 6 and the pressure nut 8 in sequence, and is threadedly connected to the threaded hole 202 on the inner side of the part 3 to be processed. The position of the pressure nut 8 is adjusted so that the pressure plate 6 is slightly lower than the end face of the part 3 to be processed. The locking nut 9 is tightened so that the end of the pressure plate 6 is pressed against the end face of the part 3 to be processed, and the axial positioning of the part 3 to be processed is completed. The positioning plate 2 places the bottom positioning bolt 4 in the adjusting hole 102 of the processing base 1, and the positioning nut 5 is pre-tightened and installed. At this time, a magnetometer is used to measure the relative offset between the axis of the part 3 to be processed on the positioning plate 2 and the axis of the processing base 1. The positioning plate 2 is fine-tuned to adjust and align the axis of the part 3 to be processed so that it is returned to the processing center of the turning tool to process the outer ring of the annular part. Figure 4 As shown, the stud bolt 7 is threadedly connected to the threaded hole 202 on the outside of the part to be processed 3, and the locating pin 10 cooperates with the locating hole 201 of the outer ring size of the part to be processed 3. In order to avoid the deformation of the part to be processed 3 due to processing, it is necessary to readjust the axis of the part to be processed 3 and then process the inner ring of the annular part. During the entire processing process, the processing deviation caused by the deformed annular part is avoided, and the processing qualification rate is improved.

Claims

1. A fixture for machining thin-walled annular workpieces, characterized in that: It includes a processing base and a positioning plate. The bottom of the processing base has a Morse taper coaxial with the turning tool processing center. The positioning plate is movably installed on the surface of the processing base through a horizontal floating component. The positioning plate is respectively installed with a limit component and a fixed pressure component for limiting the horizontal and vertical movement of the parts to be processed; The processing base is provided with a plurality of adjustment holes along the circumference, and the horizontal floating assembly includes a positioning bolt and a positioning nut, one end of the positioning bolt is fixed to the bottom of the positioning plate, and the other end of the positioning bolt passes through the adjustment hole and is threadedly connected to the positioning nut, and an annular adjustment gap is provided between the adjustment hole and the positioning bolt; The positioning plate is provided with a plurality of positioning hole groups along the circumferential direction, each positioning hole group includes a plurality of positioning holes spaced apart along the radial direction, the limiting assembly is a positioning pin, one end of the positioning pin is matched with the positioning hole, and the outer side of the other end of the positioning pin forms a limiting surface in contact with the inner ring surface / outer ring surface of the part to be processed; The positioning plate is provided with a plurality of threaded hole groups along the circumferential direction, and each threaded hole group includes a plurality of threaded holes arranged at intervals along the radial direction. The fixing and pressing component is a pressure plate, and one end of the pressure plate is in pressing contact with the end face of the part to be processed, and a stud bolt which is matched with the threaded hole passes through the other end of the pressure plate, and a locking nut and a pressure nut are respectively connected to the stud bolts located above and below the pressure plate.

2. The thin-walled annular workpiece machining fixture according to claim 1, characterized in that: There are two stud bolts corresponding to the same pressing plate, and a strip hole for the stud bolts to slide is provided at the penetration position of the pressing plate.

3. The thin-walled annular workpiece machining fixture according to claim 1, characterized in that: The shortest distance between adjacent positioning holes in the same positioning hole group is equal to the thickness of the part to be processed.

Images