A piston rod external thread machining device

Abstract

This utility model relates to a piston rod external thread machining device, including a lathe chuck, piston rod, die, screw, die sleeve, positioning sleeve, clamping screw, clamping half-hoop, and tailstock positioning rod. Its key feature is that the piston rod is clamped and positioned on the lathe chuck, the positioning sleeve is fixed to the tailstock positioning rod, the die and die sleeve are precisely slidingly engaged, and the die sleeve can move bidirectionally along the axis of the positioning sleeve during thread machining. This piston rod external thread machining device is rationally designed, compact in structure, and easy to operate.

Description

Technical Field

[0001] This utility model relates to a device for machining the external thread of a piston rod. Background Technology

[0002] There are many ways to machine the external thread of a piston rod. Common methods include direct turning with a lathe tool, and using a die fixed to a die holder and manipulating the die holder handle to create the thread. While various methods can produce the external thread on the piston rod end, when the machined thread is inspected with a standard thread gauge, issues such as dimensional and geometric tolerances often arise. Therefore, existing methods for machining piston rod end threads have limitations and need improvement. Utility Model Content

[0003] The purpose of this invention is to design a device for machining the external thread of a piston rod.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a piston rod external thread machining device, including: a lathe chuck 1, a piston rod 2, a die 3, a screw 4, a die sleeve 5, a positioning sleeve 6, clamping screws 7, a clamping half-hoop 8, and a tailstock positioning rod 9. Its characteristic is that: the piston rod 2 is clamped and positioned on the lathe chuck 1; the clamping centering circle 601 on the positioning sleeve 6 and the half-hoop positioning circle 802 of the clamping half-hoop 8 are positioned on the outer circle of the tailstock positioning rod 9; two clamping screws 7 pass through two through holes 801 and are screwed onto the clamping threaded holes 602 on the positioning sleeve 6, and tightened. On the fixed tailstock positioning rod 9, the positioning rod 9 cannot produce angular displacement, but can produce axial displacement. The centering circle 301 of the die 3 and the die centering circle 501 of the die sleeve 5 are precisely slidably engaged together. The four screws 4 are screwed into the four torque holes 302 through the four threaded holes 502 and tightened. The die 3 will not produce relative angular displacement or axial displacement in the die sleeve 5. The square shaft 503 of the die sleeve 5 is precisely slidably engaged with the square hole 603 of the positioning sleeve 6. When machining threads, it can move bidirectionally along the axis of the positioning sleeve 6.

[0005] The beneficial effects of this invention are that it improves the pass rate of piston rod thread processing quality and greatly increases production efficiency. The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0006] Appendix Figure 1 : A front view structural diagram of a piston rod external thread machining device.

[0007] Appendix Figure 2 Top view of a piston rod external thread machining device.

[0008] Appendix Figure 3: A three-dimensional view of a die for a piston rod external thread machining device.

[0009] Appendix Figure 4 A perspective view of a die sleeve for a piston rod external thread machining device.

[0010] Appendix Figure 5 A three-dimensional positioning sleeve for a piston rod external thread machining device Figure 1 .

[0011] Appendix Figure 6 A three-dimensional positioning sleeve for a piston rod external thread machining device Figure 2 .

[0012] Appendix Figure 7 A three-dimensional view of a piston rod external thread machining device clamping a half-hoop.

[0013] In the attached diagram: 1—Lathe chuck, 2—Piston rod, 3—Die, 4—Screw, 5—Die sleeve, 6—Positioning sleeve, 7—Clamping screw, 8—Clamping half-hoop, 9—Tailstock positioning rod, 301—Centering circle, 302—Torque hole, 501—Die centering circle, 502—Threaded hole, 503—Square shaft, 601—Clamping centering circle, 602—Clamping threaded hole, 603—Square hole, 801—Through hole, 802—Half-hoop positioning circle. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of this utility model, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this utility model.

[0015] The instruction manual includes Figure 1 and the instruction manual Figure 2 As shown: Piston rod 2 is clamped and positioned on lathe chuck 1.

[0016] The instruction manual includes Figure 1 The instruction manual includes Figure 6 and the instruction manual Figure 7 As shown: The clamping centering circle 601 on the positioning sleeve 6 and the half-hoop positioning circle 802 of the clamping half hoop 8 are positioned on the outer circle of the tailstock positioning rod 9. The two clamping screws 7 pass through the two holes 801 respectively and are screwed into the clamping threaded holes 602 on the positioning sleeve 6 and tightened. The positioning sleeve 6 is fixed on the tailstock positioning rod 9. The positioning rod 9 cannot produce angular displacement, but can produce axial displacement.

[0017] The instruction manual includes Figure 1 The instruction manual includes Figure 3 and the instruction manual Figure 4 As shown: The centering circle 301 of the die 3 and the centering circle 501 of the die sleeve 5 are precisely slidably fitted together. The four screws 4 are screwed into the four torque holes 302 through the four threaded holes 502 and tightened. The die 3 will not produce relative angular displacement or axial displacement in the die sleeve 5.

[0018] The instruction manual includes Figure 1 The instruction manual includes Figure 4 and the instruction manual Figure 6 As shown: The square shaft 503 of the die sleeve 5 is precisely slidably fitted with the square hole 603 of the positioning sleeve 6, and can move bidirectionally along the axis of the positioning sleeve 6 when machining threads.

[0019] The working process of a piston rod external thread machining device is as follows: The piston rod 2 is fixed inside the lathe chuck 1. The lathe spindle is started, and the die sleeve 5 is pulled, causing the die 3 fixed thereon to align with the threaded portion of the piston rod 2. The handwheel behind the lathe tailstock is turned by hand, causing the tailstock positioning rod 9 to move axially and apply a certain axial force, allowing the die 3 to begin cutting. After this, the handwheel behind the lathe tailstock is stopped. As the lathe spindle drives the piston rod 2 to rotate, the die 3 axially pulls the die sleeve forward within the square hole of the positioning sleeve, simultaneously machining the thread on the piston rod 2. After machining to the desired position, the direction of the lathe spindle is switched, and the die 3 pushes the die sleeve axially in the direction of exiting the thread on the piston rod 2. After exiting the machined thread, the piston rod 2 is removed. This piston rod external thread machining device is reasonably designed, compact in structure, and easy to operate.

Claims

1. A piston rod external thread machining device, comprising: The lathe includes a chuck (1), piston rod (2), die (3), screw (4), die sleeve (5), positioning sleeve (6), clamping screw (7), clamping half-hoop (8), and tailstock positioning rod (9). The piston rod (2) is clamped and positioned on the lathe chuck (1). The clamping centering circle (601) on the positioning sleeve (6) and the half-hoop positioning circle (802) of the clamping half-hoop (8) are positioned on the outer circle of the tailstock positioning rod (9). Two clamping screws (7) pass through two through holes (801) and are screwed onto the clamping threaded holes (602) on the positioning sleeve (6) and tightened. The positioning rod (9) is fixed on the tailstock positioning rod (9). The positioning rod (9) cannot produce angular displacement, but can produce axial displacement. The centering circle (301) of the die (3) and the centering circle (501) of the die sleeve (5) are precisely slidably engaged together. The four screws (4) are screwed into the four torque holes (302) through the four threaded holes (502) and tightened. The die (3) will not produce relative angular displacement or axial displacement in the die sleeve (5). The square shaft (503) of the die sleeve (5) and the square hole (603) of the positioning sleeve (6) are precisely slidably engaged together. When machining threads, it can move bidirectionally along the axis of the positioning sleeve (6).

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