Piston rod ball head forming device

Abstract

The utility model relates to a piston rod ball head forming device which comprises a base, a lower rotating shaft, an elastic check ring, a rotating tool rest, a ball head piston rod, an upper rotating shaft, a handle, a turning tool, a fastening screw and a machine tool, and is characterized in that a tool bar of the turning tool is inserted into a square hole of a tool bar of the U-shaped rotating tool rest, and a tool nose is close to the U-shaped side of the U-shaped rotating tool rest; a fastening screw is arranged on the side, close to the turning tool avoiding groove of the base, of the tail of the turning tool to fasten the turning tool on the U-shaped rotating tool rest. During turning, the handle is pulled by hand, the U-shaped rotating tool rest drives the turning tool to rotate along the lower rotating hole and the upper rotating hole of the base in a fixed-axis mode, the ball piston rod is turned, and due to the fact that the rotating shaft of the U-shaped rotating tool rest and the main shaft of the machine tool are two shafts perpendicular to each other, the forming surface turned by the turning tool driven by the U-shaped rotating tool rest is a spherical surface by pulling the handle.

Description

Technical Field

[0001] This utility model relates to a piston rod ball head forming device. Background Technology

[0002] Currently, there are many methods for forming piston rod ball heads. Commonly used methods include two-hand feed turning followed by template inspection, contour machining, and forming tool machining. Highly automated methods utilize CNC programming. However, all these methods suffer from the following problems: two-hand feed machining cannot guarantee accuracy, parts lack interchangeability, and is highly dependent on the operator's skill level; contour machining requires disassembling many parts from the machine tool and making necessary modifications, which is cumbersome and can easily turn the machine into a dedicated machine; forming tool machining, due to its high cutting force, results in significant springback and unsatisfactory machining quality. While CNC programming machining of ball parts is indeed convenient and produces good quality, machining piston rod ball heads is challenging. Since piston rods are slender parts, a center rest is required for support, necessitating a very long machine bed. Such machines are very expensive to achieve the required precision, making dedicated purchases impractical. Summary of the Invention

[0003] The purpose of this invention is to design a piston rod ball head forming device that has low investment cost, produces standard-sized ball heads with good interchangeability, and has high production efficiency, thus overcoming the shortcomings of existing piston rod ball head processing methods.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A piston rod ball head forming device includes: a base 1, a lower rotating shaft 2, an elastic retaining ring 3, a U-shaped rotating tool holder 4, a ball head piston rod 5, an upper rotating shaft 6, a handle 7, a lathe tool 8, a fastening screw 9, and a machine tool 10. The device is characterized in that: the U-shaped rotating tool holder 4 is inserted into the U-shaped space of the base 1; the lower tool holder positioning hexagon 201 on the lower rotating shaft 2 passes through the lower rotating hole 101 of the base 1 and is positioned in the lower positioning hexagonal hole 401 of the tool holder of the U-shaped rotating tool holder 4; the elastic retaining ring 3 is engaged in the retaining ring groove of the lower rotating hole 101; the upper tool holder positioning hexagon 603 on the upper rotating shaft 6 passes through the upper rotating hole 102 of the base 1 and is positioned in the upper positioning hexagonal hole 402 of the tool holder of the U-shaped rotating tool holder 4; the lathe tool 8 is positioned in the tool holder square hole 403; the fastening screw 9 is screwed into the set screw hole 404 of the U-shaped rotating tool holder 4 to tighten the lathe tool 8; and the handle 7 is positioned... The hexagonal hole 701 is inserted into the handle positioning hexagon 601. The handle positioning hexagon 601 on the upper rotating shaft 6 and the tool holder positioning hexagon 603 are two identical geometric bodies and can be interchanged. The tool holder of the lathe tool 8 is inserted into the tool holder square hole 403 of the U-shaped rotating tool holder 4, and the tool tip is close to the U-shaped side of the U-shaped rotating tool holder 4. The U-shaped rotating tool holder 4 can rotate along the fixed axis of the lower rotating hole 101 and the upper rotating hole 102 of the base 1. The lower rotating hole 101 and the upper rotating hole 102 are two coaxial holes. A lathe tool clearance groove 103 is provided on the base 1.

[0006] During operation, four screws are used to fix the ball head piston rod 5 to the machine tool slide through the four 104 holes on the base 1. The ball head piston rod 5 is clamped on the machine tool 10. The position of the ball head to be turned is adjusted to be inside the U-shape of the U-shaped rotating tool post 4. The cutting tool 8 is adjusted to determine the radial dimension of the ball head, and the longitudinal slide is adjusted to determine the axial position dimension of the ball head. When turning, the machine tool spindle is started, and the ball head piston rod 5 is rotated in the specified direction. Then, the handle 7 is turned by hand, so that the U-shaped rotating tool post 4 drives the cutting tool 8 to rotate along the fixed axis of the lower rotating hole 101 and the upper rotating hole 102 of the base 1 to turn the ball head piston rod 5. Since the rotating axis of the U-shaped rotating tool post 4 and the machine tool spindle are two perpendicular axes, turning the handle 7 causes the U-shaped rotating tool post 4 to drive the cutting tool 8 to turn a spherical surface.

[0007] The beneficial effects of this utility model are:

[0008] 1. A piston rod ball head forming device, which has low cost when the batch production of piston rod ball heads is not large, and has a higher cost performance compared with CNC machine tools that can process slender rods.

[0009] 2. A piston rod ball head forming device that produces a spherical profile with accurate shape and better interchangeability.

[0010] 3. A piston rod ball head forming device, which has low requirements for installation environment and method, and can be fixed to a regular machine tool with bolts.

[0011] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0012] Appendix Figure 1 : A front view structural diagram of a piston rod ball head forming device.

[0013] Appendix Figure 2 Right view of a piston rod ball head forming device.

[0014] Appendix Figure 3 Top view of a piston rod ball head forming device.

[0015] Appendix Figure 4 : A perspective view of a piston rod ball head forming device.

[0016] Figure 5: A perspective view illustrating the application of a piston rod ball head forming device in a machine tool.

[0017] Figure 6: Front view of the base of a piston rod ball head forming device.

[0018] Figure 7: A three-dimensional structural diagram of the base of a piston rod ball head forming device.

[0019] Appendix Figure 8 : A three-dimensional structural diagram of the lower rotating shaft of a piston rod ball head forming device.

[0020] Appendix Figure 9 : A front view of the rotating tool holder of a piston rod ball head forming device.

[0021] Appendix Figure 10 A three-dimensional structural diagram of a rotating tool holder for a piston rod ball head forming device.

[0022] Appendix Figure 11 : A three-dimensional structural diagram of the rotating shaft on a piston rod ball head forming device.

[0023] Appendix Figure 12 A three-dimensional structural diagram of the handle of a piston rod ball head forming device.

[0024] In the attached diagram: 1—base, 2—lower rotating shaft, 3—elastic retaining ring, 4—U-shaped rotating tool post, 5—ball-head piston rod, 6—upper rotating shaft, 7—handle, 8—lathe tool, 9—fastening screw, 10—machine tool, 101—lower rotating hole, 102—upper rotating hole, 103—lathe tool clearance groove, 104—base fixing hole, 201—lower tool post positioning hexagon, 202—lower rotating shaft rotation circle, 401—lower tool post positioning hexagonal hole, 402—upper tool post positioning hexagonal hole, 403—tool bar square hole, 404—set screw hole, 601—handle positioning hexagon, 602—upper rotating shaft rotation circle, 603—upper tool post positioning hexagon, 701—handle positioning hexagonal hole. Detailed Implementation

[0025] Instruction manual attached Figure 1 Instruction manual attached Figure 2 Instruction manual attached Figure 3 Included with instruction manual Figure 4 As shown: The U-shaped rotating tool post 4 is inserted into the U-shaped space of the base 1. The lower rotating shaft 2 is inserted into the lower rotating hole 101 of the base 1. The lower tool post positioning hexagon 201 first enters the lower rotating hole 101, and then the lower rotating shaft 2 and the lower tool post positioning hexagon 201 are inserted into the tool post lower positioning hexagon hole 401 of the U-shaped rotating tool post 4 until the lower rotating shaft 2 is completely inserted into the lower rotating hole 101. After the elastic retaining ring 3 is installed, the lower rotating shaft 2 is positioned on the U-shaped rotating tool post 4 and the base 1 and will not fall off by itself. The tool bar of the turning tool 8 is inserted into the tool bar square hole 403 of the U-shaped rotating tool post 4. The tool tip is close to the U-shaped side of the U-shaped rotating tool post 4, and the tail of the turning tool is close to the turning tool relief groove 103 of the base 1. The turning tool 8 is used to machine spheres with the tool tip. After the tool tip position is adjusted, the fastening screw 9 is installed to fasten the turning tool 8 to the U-shaped rotating tool post 4.

[0026] Instruction manual attached Figure 5 As shown: A piston rod ball head forming device base 1 is fixed to the small slide of the machine tool with screws. The ball head piston rod 5 is clamped on the chuck of the machine tool 10. Since the ball head piston rod 5 is a slender workpiece, a center support is used to support it near the ball head end, which enhances the stability of the workpiece during turning and ensures the machining accuracy. The rotation direction of the workpiece is the direction of the arrow in the figure.

[0027] Instruction manual attached Figure 6 Included with instruction manual Figure 7 As shown: The base 1 is provided with a lower rotating hole 101, an upper rotating hole 102, a tool clearance groove 103, and a base fixing hole 104. The lower rotating hole 101 and the upper rotating hole 102 are used to constrain and position the U-shaped rotating tool holder, ensuring that the U-shaped rotating tool holder can only rotate around the lower rotating hole 101 and the upper rotating hole 102 as fixed axes. The lower rotating hole 101 and the upper rotating hole 102 are a pair of coaxial holes. The tool clearance groove 103 ensures that the tool 8 will not interfere with the base 1 during adjustment and machining. The base fixing hole 104 is used for the docking connection between a piston rod ball-end forming device and the machine tool.

[0028] Instruction manual attached Figure 8As shown: The lower rotating shaft 2 is provided with a lower tool holder positioning hexagon 201 and a lower rotating shaft rotation circle 202. The lower tool holder positioning hexagon 201 is used to slide and connect with the tool holder lower positioning hexagon hole 401 of the U-shaped rotating tool holder 4. When machining ball heads, it can bear the torque formed by the cutting force. The lower rotating shaft rotation circle 202 is used to slide and connect with the lower rotating hole 101 of the base 1 to form a rotating pair. This allows the U-shaped rotating tool holder 4 to rotate regularly around this rotating pair, so that regular piston rod ball heads can be machined.

[0029] Instruction manual attached Figure 9 Included with instruction manual Figure 10 As shown: The U-shaped rotating tool post 4 has a lower positioning hexagonal hole, a 402 positioning hexagonal hole on the 401 tool post, a square hole 403 for the tool shank, and a set screw hole 404. The lower positioning hexagonal hole on the upper tool post and the 402 positioning hexagonal hole on the 401 tool post are two identical holes and are coaxial. Their function is to transmit the torque generated by the cutting force during the machining process. The square hole 403 for the tool shank is slidingly fitted to the outer square hole of the tool shank of the turning tool 8. The turning tool 8 can extend and retract within the square hole 403 for the tool shank, thereby determining the small diameter of the piston rod ball head. After the diameter of the piston rod ball head is determined, the fastening screw 9 is screwed into the set screw hole 404 to fix the turning tool 8 on the U-shaped rotating tool post 4, ensuring the stability of the machining dimensions during the turning process.

[0030] Instruction manual attached Figure 11 As shown: A handle positioning hexagon 601, an upper rotating shaft rotation circle 602, and a tool holder positioning hexagon 603 are provided on the upper rotating shaft 6. The handle positioning hexagon 601 and the tool holder positioning hexagon 603 have the same structure and dimensions and are two interchangeable parts that can be used in reverse. The handle positioning hexagon 601 is used to connect with the handle positioning hexagon hole 701 of the handle 7 and, together with the tool holder positioning hexagon 603, transmits cutting torque. The upper rotating shaft rotation circle 602 and the upper rotating hole 102 of the base 1 are connected by a sliding fit to form a rotating pair, so that the U-shaped rotating tool holder 4 rotates about this rotating pair.

[0031] Instruction manual attached Figure 12 As shown: The handle 7 is provided with a handle positioning hexagonal hole 701, which is slidably connected with the handle positioning hexagonal hole 601 to transmit the torque generated during the cutting process. When cutting, the handle can be turned by hand at a uniform speed, which can save effort during cutting.

[0032] A piston rod ball head forming device process: Before operation, the ball head piston rod 5 is clamped on the chuck of the machine tool 10 and supported on the piston rod near the ball head end by an adjusted center frame. Based on the size of the ball head, the base of the piston rod ball head forming device is fixed on the small slide of the machine tool 10. A ball head size slightly larger than the drawing size is initially determined based on the ball head blank size. The handle 7 is manually operated to cut, forming a standard piston rod ball head. After measurement with measuring tools, further adjustments are made based on the difference between the measured actual size and the size specified in the drawing, until the specified size is achieved. This piston rod ball head forming device has a reasonable design, novel structure, standard spherical contour, good interchangeability, and high cost-effectiveness.

Claims

1. A piston rod ball head forming device, comprising: The machine tool comprises a base (1), a lower rotating shaft (2), an elastic retaining ring (3), a U-shaped rotating tool post (4), a ball-head piston rod (5), an upper rotating shaft (6), a handle (7), a lathe tool (8), a fastening screw (9), and a machine tool (10), characterized in that: the U-shaped rotating tool post (4) is inserted into the U-shaped space of the base (1), and the lower rotating shaft (2) The upper tool post positioning hexagon (201) passes through the lower rotating hole (101) of the base (1) and is positioned in the lower positioning hexagon hole (401) of the U-shaped rotating tool post (4). The elastic retaining ring (3) is stuck in the retaining ring groove of the lower rotating hole (101). The upper tool post positioning hexagon (603) on the upper rotating shaft (6) passes through the upper rotating hole (102) of the base (1) and is positioned in the upper positioning hexagon hole (402) of the U-shaped rotating tool post (4). The lathe tool (8) is positioned in the square hole (403) of the tool holder. The fastening screw (9) is screwed into the set screw hole (404) of the U-shaped rotating tool post (4) to tighten the lathe tool (8). The handle (7) has a hand The shank positioning hexagonal hole (701) is inserted into the handle positioning hexagonal hole (601). The handle positioning hexagonal hole (601) on the upper rotating shaft (6) and the tool holder positioning hexagonal hole (603) are two identical geometric bodies and can be interchanged. The tool bar of the lathe tool (8) is inserted into the tool bar square hole (403) of the U-shaped rotating tool holder (4). The tool tip is close to the U-shaped side of the U-shaped rotating tool holder (4). The U-shaped rotating tool holder (4) can rotate along the fixed axis of the lower rotating hole (101) and the upper rotating hole (102) of the base (1). The lower rotating hole (101) and the upper rotating hole (102) are two coaxial holes. The lathe tool clearance groove (103) is provided on the base (1).

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