Adapter structure of numerically controlled lathe

Abstract

The utility model discloses an adapter plate structure of a numerical control lathe, and belongs to the technical field of valve manufacturing. The structure comprises a lathe spindle, an adapter disc and a mandrel, the adapter disc and the lathe spindle are coaxially arranged, and the adapter disc is connected with the lathe spindle through a plurality of connecting pieces A, a plurality of positioning pieces are evenly distributed and embedded in the adapter disc, and the mandrel and the adapter disc are coaxially arranged, and the mandrel is connected with the adapter disc through a plurality of connecting pieces B. The connection between the adapter plate and the lathe spindle and the connection between the mandrel and the adapter plate are reliable, and the risk that the adapter plate and the mandrel are thrown out due to loosening when the lathe spindle rotates is avoided. A threaded hole machined in the valve shell is in threaded connection with a threaded section on the core shaft, then one end of the pin shaft penetrates through an existing through hole in the valve shell and then is inserted into the positioning piece so as to stop rotation of the valve shell, and due to the fact that the switching disc and the lathe spindle are coaxially arranged, and the core shaft and the switching disc are coaxially arranged, the valve shell and the core shaft are coaxially arranged. A machined threaded hole and a to-be-machined threaded hole in the valve shell are both coaxial with the lathe spindle, and the machining precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to a structure of a turntable for a numerically controlled lathe, belonging to the technical field of valve manufacturing. Background Technique

[0002] After machining a threaded hole at one end of a valve housing, it is necessary to use a numerically controlled lathe to machine a threaded hole at the other end and ensure that the center lines of the threaded holes at both ends of the valve housing coincide. Generally, a three-jaw chuck on the main shaft of the numerically controlled lathe is used to clamp the faceplate, and then the valve housing is installed on the faceplate to machine the threaded hole. In order to ensure that the faceplate is suitable for installing valve housings with various diameter specifications, its diameter is usually large. However, an overly large diameter of the faceplate will result in limited clamping force of the three-jaw chuck on it, posing a risk of the faceplate loosening and flying out. In addition, due to the excessive total weight of the faceplate and the valve housing, the coaxiality between the threaded hole to be machined and the main shaft of the numerically controlled lathe after adjustment is still not high, resulting in a decline in machining accuracy.

[0003] Chinese patent document with the publication number CN111002078A discloses a tooling for machining a valve body on a lathe, including a main body. One end of the main body is connected to a turntable, the turntable is fixed on the main shaft of the lathe, and the workpiece is located inside the main body. A positioning plate for fixing the workpiece is arranged between the bottom end of the workpiece and the inner side surface of the main body. A positioning sleeve for positioning the workpiece is arranged on the upper surface of the positioning plate. One end of the positioning plate is connected to the main body through a pressing plate, and the other end of the positioning plate is pressed against the turntable under the action of the pressing plate. A counterweight is arranged between the top of the workpiece and the inner side surface of the main body, and a pressing member for pressing the counterweight against the workpiece is arranged on the side wall of the main body. It can solve the problem that the accuracy of the valve body is not easy to control during the machining process and can achieve the rapid positioning of the workpiece.

[0004] However, this tooling is mainly used for coaxially clamping the valve body onto the main shaft of the lathe. When machining the threaded hole at the end of the valve housing, the valve housing is not coaxial with the main shaft of the lathe. Therefore, this tooling is not suitable for clamping the valve housing to machine the threaded hole at its end. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a structure of a turntable for a numerically controlled lathe.

[0006] The utility model is achieved through the following technical solutions:

[0007] A structure of a turntable for a numerically controlled lathe includes a lathe main shaft, a turntable, and a mandrel. The turntable is coaxially arranged with the lathe main shaft and is connected to the lathe main shaft through a plurality of connecting members A. A plurality of positioning members are evenly embedded on the turntable. The mandrel is coaxially arranged with the turntable and is connected to the turntable through a plurality of connecting members B.

[0008] A hydraulic telescopic rod is coaxially arranged inside the lathe spindle, and a protective member is detachably connected to one end of the hydraulic telescopic rod close to the adapter plate.

[0009] One end of the protective member is coaxially provided with a blind threaded hole, and the other end is coaxially provided with a hexagonal groove.

[0010] One end of the lathe spindle close to the adapter plate is coaxially provided with a positioning hole A.

[0011] One end of the adapter plate close to the lathe spindle is coaxially provided with a positioning boss, and the adapter plate is coaxially provided with a positioning hole B. A counterbore is provided at a position corresponding to the connecting member A on the adapter plate, a threaded hole is provided at a position corresponding to the connecting member B, and a positioning hole C is provided at a position corresponding to the positioning member.

[0012] The positioning member is a positioning sleeve, and the positioning sleeve is in transitional fit or interference fit with the positioning hole C.

[0013] One end of the adapter plate close to the lathe spindle is coaxially provided with an avoidance hole.

[0014] Both the connecting member A and the connecting member B are screws.

[0015] The mandrel includes a coaxial positioning section, a flange, and a threaded section. One end of the flange is connected to one end of the positioning section, and the other end is connected to one end of the threaded section. A through hole is provided at a position corresponding to the connecting member B on the flange.

[0016] A positioning pin is further included, and one end of the positioning pin is inserted into one of the positioning members.

[0017] The beneficial effects of the present utility model are as follows: The adapter plate is connected to the lathe spindle through a plurality of connecting members A, and the mandrel is connected to the adapter plate through a plurality of connecting members B. The connection between the adapter plate and the lathe spindle and between the mandrel and the adapter plate is reliable, avoiding the risk that the adapter plate and the mandrel are thrown out due to loosening when the lathe spindle rotates. The threaded hole already processed on the valve housing is threadedly connected to the threaded section on the mandrel, and then one end of the pin shaft passes through the existing through hole on the valve housing and is inserted into the positioning member to prevent the valve housing from rotating. Since the adapter plate and the lathe spindle are coaxially arranged, and the mandrel and the adapter plate are coaxially arranged, the already processed threaded hole and the to-be-processed threaded hole on the valve housing are both coaxial with the lathe spindle, ensuring the machining accuracy. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a front view structural schematic diagram of the adapter plate of the present utility model;

[0020] Figure 3 is Figure 2Rotated section view along AA;

[0021] Figure 4 It is a structural schematic diagram of the protective member of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the mandrel of the utility model.

[0023] In the figure: 1- lathe spindle, 100- positioning hole A, 2- hydraulic telescopic rod, 3- adapter plate, 31- avoidance hole, 32- positioning hole B, 34- countersunk hole, 35- threaded hole, 36- positioning hole C, 37- positioning boss, 4- connecting part A, 5- protective part, 50- threaded blind hole, 51- hexagonal groove, 6- mandrel, 60- positioning section, 61- flange, 62- threaded section, 7- connecting part B, 8- positioning part. DETAILED DESCRIPTION

[0024] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0025] After removing the hydraulic three-jaw chuck that comes with the CNC lathe and studying its structure, it was found that there is a hydraulic telescopic rod 2 connected to the hydraulic three-jaw chuck in the CNC lathe spindle. When the control pedal is stepped on, the hydraulic telescopic rod 2 will extend and drive the hydraulic three-jaw chuck to clamp the faceplate. However, since the diameter of the ordinary faceplate is too large, when the hydraulic three-jaw chuck clamps the faceplate, the hydraulic telescopic rod 2 is still in the startup stage and the stroke is very short. The clamping force of the hydraulic three-jaw chuck on the faceplate is smaller than the clamping force of the workpiece with a small diameter. In addition, since the hydraulic three-jaw chuck has only three jaws and the contact area with the faceplate is small, the faceplate is easy to loosen and eccentric when the lathe spindle rotates, affecting the processing accuracy.

[0026] like Figures 1 to 5 As shown, a CNC lathe adapter plate structure described in the utility model includes a lathe spindle 1, an adapter plate 3 and a core shaft 6. The adapter plate 3 is coaxially arranged with the lathe spindle 1 and connected to the lathe spindle 1 through multiple connecting parts A4. A plurality of positioning parts 8 are evenly embedded on the adapter plate 3. The core shaft 6 is coaxially arranged with the adapter plate 3 and connected to the adapter plate 3 through multiple connecting parts B7.

[0027] After removing the three-jaw chuck on the CNC lathe spindle, the adapter plate 3 is connected to the lathe spindle 1 through multiple connectors A4, and the mandrel 6 is connected to the adapter plate 3 through multiple connectors B7. The adapter plate 3 and the lathe spindle 1, and the mandrel 6 and the adapter plate 3 are reliably connected, avoiding the risk of the adapter plate 3 and the mandrel 6 being thrown out due to loosening when the lathe spindle 1 rotates. When in use, the mandrel 6 blank can be connected to the adapter plate 3 through multiple connectors B7, and then the threaded section 62 on the mandrel 6 can be processed by the CNC lathe to ensure that the threaded section 62 is coaxial with the lathe spindle 1, thereby improving the processing accuracy of the valve housing. The processed threaded hole on the valve housing is threadedly connected with the threaded section 62 on the core shaft 6, and then one end of the pin shaft is inserted into the positioning member 8 after passing through the existing through hole on the valve housing to stop the valve housing from rotating. Since the adapter plate 3 is coaxially arranged with the lathe spindle 1, and the core shaft 6 is coaxially arranged with the adapter plate 3, the processed threaded hole and the threaded hole to be processed on the valve housing are coaxial with the lathe spindle 1, thereby ensuring the processing accuracy.

[0028] A hydraulic telescopic rod 2 is coaxially arranged in the lathe spindle 1, and a protective member 5 is detachably connected to one end of the hydraulic telescopic rod 2 near the adapter plate 3. The hydraulic telescopic rod 2 is originally used to operate the hydraulic three-jaw chuck on the lathe spindle 1, so after the hydraulic three-jaw chuck is removed, the protective member 5 is installed at the end of the hydraulic telescopic rod 2 to protect the hydraulic telescopic rod 2.

[0029] The protective member 5 has a threaded blind hole 50 coaxially disposed at one end and a hexagonal groove 51 coaxially disposed at the other end. The protective member 5 is threadedly connected to the hydraulic telescopic rod 2, and the hexagonal groove 51 is processed at one end of the protective member 5, so that the protective member 5 can be easily assembled and disassembled using tools such as an inner hexagonal wrench.

[0030] A positioning hole A100 is coaxially provided on one end of the lathe spindle 1 close to the adapter plate 3. When in use, the positioning boss 37 is matched with the positioning hole A100 with a small gap to ensure that the adapter plate 3 is coaxial with the lathe spindle 1.

[0031] A positioning boss 37 is coaxially provided on one end of the adapter plate 3 close to the lathe spindle 1, and a positioning hole B32 is coaxially provided on the adapter plate 3. A countersunk hole 34 is provided on the adapter plate 3 at a position corresponding to the connector A4, a threaded hole 35 is provided at a position corresponding to the connector B7, and a positioning hole C36 is provided at a position corresponding to the positioning member 8. When in use, the positioning section 60 of the mandrel 6 is matched with the positioning hole B32 with a small gap to ensure that the mandrel 6 is coaxial with the adapter plate 3. One end of the connector A4 passes through the countersunk hole 34 and is threadedly connected to the threaded hole on the lathe spindle 1 to install and fix the adapter plate 3 to the lathe spindle 1. One end of the connector B7 passes through the through hole on the flange 61 and is threadedly connected to the threaded hole 35 to install and fix the mandrel 6 to the adapter plate 3.

[0032] The positioning member 8 is a positioning sleeve, and the positioning sleeve is in transitional fit or interference fit with the positioning hole C36.

[0033] One end of the adapter plate 3 close to the lathe spindle 1 is coaxially provided with an avoidance hole 31. The protection member 5 is given way through the avoidance hole 31.

[0034] Both the connecting member A4 and the connecting member B7 are screws.

[0035] The mandrel 6 includes a positioning section 60, a flange 61 and a threaded section 62 which are coaxially arranged. One end of the flange 61 is connected to one end of the positioning section 60, and the other end is connected to one end of the threaded section 62. A through hole is provided on the flange 61 at a position corresponding to the connecting member B7. The flange 61 is installed and fixed to the adapter plate 3 through the connecting member B7, so that the mandrel 6 can be disassembled and replaced, which is convenient for machining different valve housings.

[0036] It further includes a positioning pin, and one end of the positioning pin is inserted into one of the positioning members 8. During use, after the threaded hole machined on the valve housing is threadedly connected to the threaded section 62 on the mandrel 6, one end of the pin shaft is inserted into the positioning member 8 after passing through the existing through hole on the valve housing to prevent the valve housing from rotating. If the positioning sleeve is machined with internal threads, external threads can also be machined at one end of the positioning member 8 to be threadedly connected to the positioning sleeve to realize the loosening and removal of the positioning member 8.

Claims

1. A structure of a transfer plate for a numerically controlled lathe, characterized in that: It includes a lathe spindle (1), an adapter plate (3) and a mandrel (6). The adapter plate (3) is coaxially arranged with the lathe spindle (1) and is connected to the lathe spindle (1) through a plurality of connecting parts A (4). A plurality of positioning parts (8) are evenly embedded in the adapter plate (3). The mandrel (6) is coaxially arranged with the adapter plate (3) and is connected to the adapter plate (3) through a plurality of connecting parts B (7).

2. The structure of the adapter plate of the numerically controlled lathe according to claim 1, wherein: A hydraulic telescopic rod (2) is coaxially arranged in the lathe spindle (1), and a protective part (5) is detachably connected to one end of the hydraulic telescopic rod (2) close to the adapter plate (3).

3. The structure of the adapter plate of the CNC lathe according to claim 2, characterized in that: One end of the protective part (5) is coaxially provided with a blind threaded hole (50), and the other end is coaxially provided with a hexagonal groove (51).

4. The structure of the adapter plate of the CNC lathe according to claim 1, characterized in that: A positioning hole A (100) is coaxially arranged at one end of the lathe spindle (1) close to the adapter plate (3).

5. The structure of the adapter plate of the CNC lathe according to claim 1, characterized in that: A positioning boss (37) is coaxially arranged at one end of the adapter plate (3) close to the lathe spindle (1). A positioning hole B (32) is coaxially arranged on the adapter plate (3). Counterbore holes (34) are provided at positions corresponding to the connecting parts A (4) on the adapter plate (3), threaded holes (35) are provided at positions corresponding to the connecting parts B (7), and positioning holes C (36) are provided at positions corresponding to the positioning parts (8).

6. The structure of the adapter plate of the CNC lathe according to claim 5, wherein: The positioning part (8) is a positioning sleeve, and the positioning sleeve is in transitional fit or interference fit with the positioning hole C (36).

7. The structure of the adapter plate of the CNC lathe according to claim 5, characterized in that: An avoidance hole (31) is coaxially arranged at one end of the adapter plate (3) close to the lathe spindle (1).

8. The structure of the adapter plate of the CNC lathe according to claim 1, characterized in that: Both the connecting part A (4) and the connecting part B (7) are screws.

9. The structure of the adapter plate of the CNC lathe according to claim 1, wherein: The mandrel (6) includes a positioning section (60), a flange plate (61) and a threaded section (62) which are coaxially arranged. One end of the flange plate (61) is connected to one end of the positioning section (60), and the other end is connected to one end of the threaded section (62). Through holes are provided at positions corresponding to the connecting parts B (7) on the flange plate (61).

10. The structure of the adapter plate of the CNC lathe according to claim 1, characterized in that: It further includes a positioning pin, and one end of the positioning pin is inserted into one of the positioning parts (8).

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