Precision machining device for outer surface of piston rod

Abstract

The invention relates to the field of part machining, in particular to a piston rod outer surface precision machining device which comprises a machine body, a clamping piece arranged in the machine body and used for clamping the end of a to-be-machined part, a cutting ring seat arranged on the machine body in a sliding mode and a driving assembly used for driving the cutting ring seat to move in the axis direction of the to-be-machined part. A cutting tool used for turning a workpiece to be machined is arranged on the cutting ring seat, fixed seats allowing the workpiece to be machined to penetrate in a sliding mode are arranged on the two sides, opposite to the axial direction of the cutting ring seat, in the machine body, a movable seat is arranged between the fixed seats and the cutting ring seat in a sliding mode, and the movable seat is tightly attached to and detachably connected to the cutting ring seat. Elastic bag pipes are arranged between the movable seats and the corresponding fixed seats, and a water supply assembly used for introducing cooling liquid into the elastic bag pipes is further arranged in the machine body. The method has the advantage of improving the machining precision of the outer surface of the piston rod.

Description

Technical Field

[0001] The present application relates to the field of parts processing, and in particular to a precision processing device for the outer surface of a piston rod. Background Art

[0002] The piston rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and pneumatic cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements.

[0003] The piston rod is usually turned on a lathe. During the turning process, the spray device on the lathe usually sprays and cools the turning area synchronously with the tool, so as to improve the problem that the high temperature generated by turning causes the piston rod to expand and affect its processing accuracy.

[0004] Since the spraying position of the spray device changes with the tool, and the part of the piston rod sprayed by the spray device still has a certain amount of heat, this part will still expand to a certain extent, which leads to poor overall turning accuracy of the outer surface of the piston rod and obvious deficiencies. Summary of the invention

[0005] In order to improve the problem of low machining accuracy of the outer surface of a piston rod, the present application provides a device for machining the outer surface of a piston rod with high accuracy.

[0006] The present application provides a piston rod outer surface precision processing device adopts the following technical solution: A device for precision machining the outer surface of a piston rod comprises a body, a clamping member arranged in the body and used to clamp the end of a workpiece to be machined, a ring cutter seat and a driving assembly for driving the ring cutter seat to move along the axial direction of the workpiece to be machined are slidably arranged on the body, and a tool for turning the workpiece to be machined is arranged on the ring cutter seat, and fixed seats for the workpiece to be machined to slide through are arranged on both sides of the axial direction of the ring cutter seat in the body relative to the ring cutter seat, a movable seat is slidably arranged between the fixed seat and the ring cutter seat, the movable seat is tightly and detachably connected to the ring cutter seat, an elastic bag tube is arranged between the movable seat and the corresponding fixed seat, and a water supply assembly for introducing cooling liquid into the elastic bag tube is also provided in the body.

[0007] By adopting the above technical solution, the workpiece to be processed passes through the two fixed seats and the ends are clamped by the clamping member, the movable seat is close to the ring knife seat and connected to it, and the elastic bag tube is stretched. The device is started, the clamping member drives the workpiece to be processed to rotate, the driving component drives the ring knife seat to move, and the tool on the ring knife seat processes the outer surface of the workpiece to be processed. During the processing, the water supply component fills the cavity enclosed by the two elastic bag tubes and the ring knife seat, so that the processing part of the workpiece to be processed is immersed in the coolant during the entire processing process, reducing the possibility of thermal expansion of the workpiece to be processed, thereby improving the processing accuracy of the outer surface of the workpiece to be processed.

[0008] Optionally, the ring knife seat is C-shaped and the notch of the ring knife seat faces upward, and a sealing cover is arranged in the notch of the ring knife seat. One side of the sealing cover is hinged to one arcuate end of the ring knife seat, and the other side is fastened to the other arcuate end of the ring knife seat through a quick buckle.

[0009] By adopting the above technical solution, the hinged connection between the sealing cover and the ring cutter seat facilitates the loading and unloading of the workpiece between the movable seat, the fixed seat and the ring cutter seat, and can reduce the possibility of coolant overflowing from the notch of the ring cutter seat.

[0010] Optionally, the drive assembly includes a motor bolted in the machine body and electrically connected to the control system, a transmission screw is coaxially arranged on the output shaft of the motor, and the ring knife seat is threadedly connected to the transmission screw.

[0011] By adopting the above technical solution, the control system starts the motor, the output shaft of the motor drives the rotation of the transmission screw, and the transmission screw moves the tool holder through the threaded drive ring, thereby realizing the feeding and retracting of the tool.

[0012] Optionally, proximity switches electrically connected to the control system are arranged near both ends of the transmission screw rod in the body, and sensing blocks for being sensed by the proximity switches are embedded on both axial sides of the ring knife seat.

[0013] By adopting the above technical solution, when the ring knife seat drives the sensing block to move close to the proximity switch, the proximity switch can sense the sensing block, thereby restricting the movement range of the ring knife seat.

[0014] Optionally, a plurality of clearance openings are opened circumferentially on the circumferential outer wall of the ring knife seat, a screw rod is hinged on the movable seat for rotating into the clearance opening, and a horn nut is threadedly connected on the screw rod for tightening the side of the ring knife seat facing away from the movable seat where the ring knife seat is located.

[0015] By adopting the above technical solution, when the movable seat and the ring knife seat are in close contact, the worker manually turns the screw into the corresponding clearance opening, and then tightens the ram nut, thereby realizing the rapid disassembly and assembly between the movable seat and the ring knife seat.

[0016] Optionally, the water supply assembly includes a water pump arranged in the body and electrically connected to the control system, and a circulating refrigerator located at the bottom of the body and used to refrigerate the coolant. The interior of the sealing cover is hollow and connected to multiple nozzles facing the workpiece to be processed. The water inlet end of the water pump is connected to the circulating refrigerator, and the other end is connected to the inner cavity of the sealing cover through a hose.

[0017] By adopting the above technical solution, the coolant that absorbs heat from the workpiece to be processed flows back to the bottom of the machine body, and the circulating refrigerator re-cools the coolant. The water pump returns the coolant taken by the circulating refrigerator to the sealing cover, and then it is sprayed onto the workpiece to be processed by the nozzle. The coolant circulates and cools, thereby further improving the processing accuracy of the outer surface of the piston rod.

[0018] Optionally, there is a clearance fit between the workpiece to be processed and the fixing seat.

[0019] By adopting the above technical solution, the coolant in the elastic bag tube flows out from the gap between the workpiece to be processed and the fixed seat, thereby achieving continuous cooling of the workpiece to be processed during the processing.

[0020] Optionally, a pull wire is tied between the two movable seats, a reversing ring is arranged on the fixed seat, the pull wire passes through the reversing ring, and a hook for hanging the pull wire is arranged in the body.

[0021] By adopting the above technical solution, workers manually pull the pull wire to hang it on the hook, so that the movable seat is close to the ring knife seat, which is convenient and labor-saving to operate.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The workpiece to be processed passes through two fixed seats and its end is clamped by the clamping member. The movable seat is close to the knife ring seat and connected to it, and the elastic bag tube is stretched. The device is started, the clamping member drives the workpiece to be processed to rotate, the driving component drives the knife ring seat to move, and the tool on the knife ring seat processes the outer surface of the workpiece to be processed. During the processing, the water supply component fills the cavity enclosed by the two elastic bag tubes and the knife ring seat with coolant, so that the processing part of the workpiece to be processed is immersed in the coolant during the entire processing process, which reduces the possibility of thermal expansion of the workpiece to be processed, thereby improving the processing accuracy of the outer surface of the workpiece to be processed; 2. The coolant that absorbs heat from the workpiece flows back to the bottom of the machine body, and the circulating refrigerator re-cools the coolant. The water pump returns the coolant taken by the circulating refrigerator to the sealing cover, and then it is sprayed onto the workpiece by the nozzle. The coolant circulates and refrigerates, further improving the processing accuracy of the outer surface of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0024] Figure 2 It is an exploded view between the ring knife seat, the movable seat and the fixed seat in the embodiment of the present application.

[0025] Explanation of the reference numerals: 1. machine body; 2. clamping part; 3. ring knife seat; 301. clearance port; 4. knife; 5. fixed seat; 6. movable seat; 7. elastic bag tube; 81. water pump; 82. circulating refrigerator; 83. nozzle; 84. hose; 9. sealing cover; 10. quick buckle; 11. proximity switch; 12. induction block; 13. screw rod; 14. ram nut; 15. pull wire; 16. reversing ring; 17. hook. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-2 This application is described in further detail.

[0027] The embodiment of the present application discloses a device for precision machining of the outer surface of a piston rod.

[0028] Reference Figure 1 The piston rod outer surface precision processing device includes a body 1, and a clamping member 2 arranged in the body 1 and used for absorbing and clamping the end of the workpiece to be processed. The clamping member 2 directly adopts a three-jaw chuck in the prior art.

[0029] Reference Figure 1 and Figure 2 A ring cutter holder 3 and a driving assembly for driving the ring cutter holder 3 to move along the axis of the workpiece to be processed are slidably arranged in the machine body 1. The driving assembly includes a motor (not shown in the figure) bolted in the machine body 1 and electrically connected to the control system, a transmission screw (not shown in the figure) is coaxially arranged on the output shaft of the motor, and the ring cutter holder 3 is threadedly connected to the transmission screw.

[0030] The motor adopts the forward and reverse motor in the prior art. The control system starts the motor, and the output shaft of the motor drives the transmission screw to rotate, and the transmission screw drives the ring tool holder 3 to move through the thread. The ring tool holder 3 is bolted with a tool 4 for turning the outer surface of the workpiece, so that the drive assembly realizes the feeding and retracting of the tool 4 through the ring tool holder 3.

[0031] Reference Figure 1 and Figure 2 A proximity switch 11 electrically connected to the control system is bolted to the positions near both ends of the transmission screw in the body 1, and a sensing block 12 for being sensed by the proximity switch 11 is embedded on both axial sides of the ring knife seat 3.

[0032] When the ring knife seat 3 drives the induction block 12 to move close to the proximity switch 11, the proximity switch 11 can sense the induction block 12. The two groups of proximity switches 11 and the induction block 12 cooperate to limit the maximum movement range of the ring knife seat 3.

[0033] Reference Figure 1 and Figure 2The ring knife seat 3 is C-shaped and the notch of the knife changing seat is facing upward. A sealing cover 9 is arranged in the notch of the ring knife seat 3. One side of the sealing cover 9 is hinged to one arc end of the ring knife seat 3, and the other end is buckled to the other arc end of the ring knife seat 3 through a quick buckle 10.

[0034] The worker manually unlocks the quick buckle 10 and turns the sealing cover 9 away from the notch of the ring knife seat 3. After that, the workpiece can be easily disassembled and assembled, which is conducive to improving the processing efficiency of the workpiece.

[0035] Reference Figure 1 and Figure 2 A fixed seat 5 is bolted on both sides of the machine body 1 relative to the axial direction of the ring knife seat 3 for the workpiece to be processed to slide through, and there is a clearance fit between the workpiece to be processed and the fixed seat 5. A movable seat 6 is slidably arranged between the fixed seat 5 and the ring knife seat 3, and the movable seat 6 is detachably connected to the ring knife seat 3.

[0036] Reference Figure 1 and Figure 2 A plurality of clearance openings 301 are opened circumferentially on the circumferential outer wall of the ring knife seat 3, and a screw 13 for rotating into the clearance opening 301 is hinged on the movable seat 6, and a horn nut 14 is threadedly connected on the screw 13 for tightening the ring knife seat 3 on the side of the movable seat 6 where it is located.

[0037] Reference Figure 1 and Figure 2 An elastic bag tube 7 is bonded between the movable seat 6 and the corresponding fixed seat 5. When the workpiece to be processed is clamped, the worker manually moves the movable seat 6 close to the ring knife seat 3, and then assembles the movable seat 6 and the ring knife seat 3 through the screw 13 and the ram nut 14. During this process, the elastic bag tube 7 is stretched.

[0038] A pull wire 15 is tied between the two movable seats 6, a reversing ring 16 is welded on the fixed seat 5, the pull wire 15 passes through the reversing ring 16, and a hook 17 for hanging the pull wire 15 is welded in the body 1. The worker manually pulls the pull wire 15 to hang it on the hook 17, so that the movable seat 6 quickly approaches the ring knife seat 3, which is easy to operate and labor-saving.

[0039] Reference Figure 1 and Figure 2 A water supply assembly for introducing cooling liquid into the elastic bag tube 7 is also arranged in the body 1. The water supply assembly includes a water pump 81 bolted to the bottom of the body 1 and electrically connected to the control system, and a circulating refrigerator 82 located at the bottom of the body 1 and used to refrigerate the cooling liquid.

[0040] The sealing cover 9 is hollow inside and connected with a plurality of nozzles 83 facing the workpiece to be processed. The water inlet of the water pump 81 is connected to the circulating refrigerator 82 , and the water outlet of the water pump 81 is connected to the inner cavity of the sealing cover 9 through a hose 84 .

[0041] Reference Figure 1 and Figure 2 The control system starts the circulating refrigerator 82 and the water pump 81. The circulating refrigerator 82 cools the coolant at the bottom of the body 1, and the water pump 81 sends the cooled coolant into the sealing cover 9, and then the coolant is sprayed from the nozzle 83 onto the workpiece to be processed.

[0042] During the whole processing of the workpiece, the cavity enclosed by the two elastic bag tubes 7 and the ring knife seat 3 is filled with coolant, the workpiece is immersed in the coolant, and the coolant after absorbing heat flows back to the bottom of the machine body 1 from the gap between the workpiece and the fixing seat 5.

[0043] The implementation principle of a precision machining device for the outer surface of a piston rod in the embodiment of the present application is as follows: The worker manually unlocks the quick buckle 10 and turns the sealing cover 9 away from the notch of the ring knife seat 3. Then, the end of the workpiece to be processed passes through the fixing seat 5 and is clamped by the clamping member 2. The sealing cover 9 is then fastened to the ring knife seat 3 through the quick buckle 10.

[0044] Next, the pull wire 15 is manually hung on the hook 17 , the movable seat 6 is close to the ring knife seat 3 , the screw rod 13 is rotated into the corresponding clearance opening 301 and the clevis nut 14 is tightened.

[0045] The control system starts the motor, the output shaft of the motor drives the transmission screw to rotate, and the transmission screw drives the ring cutter seat 3 to move through the thread, thereby realizing the feeding and retracting of the tool 4.

[0046] At the same time, the circulating refrigerator 82 cools the coolant at the bottom of the body 1, and the water pump 81 delivers the cooled coolant into the sealing cover 9, and then the coolant is sprayed onto the workpiece through the nozzle 83. The coolant after absorbing heat flows back to the bottom of the body 1 from the gap between the workpiece and the fixing seat 5.

[0047] During the whole processing, the cavity enclosed by the two elastic bag tubes 7 and the ring cutter seat 3 is filled with coolant, and the workpiece to be processed is immersed in the coolant.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A precision machining device for the outer surface of a piston rod, comprising a body (1), and a clamping member (2) arranged in the body (1) and used for clamping the end of a workpiece to be machined, characterized in that: A ring cutter seat (3) and a driving component for driving the ring cutter seat (3) to move along the axial direction of the workpiece to be processed are slidably arranged on the machine body (1); a tool (4) for turning the workpiece to be processed is arranged on the ring cutter seat (3); fixed seats (5) for the workpiece to be processed to slide through are arranged on both sides of the axial direction of the ring cutter seat (3) in the machine body (1); a movable seat (6) is slidably arranged between the fixed seat (5) and the ring cutter seat (3); the movable seat (6) is tightly and detachably connected to the ring cutter seat (3); an elastic bag tube (7) is arranged between the movable seat (6) and the corresponding fixed seat (5); and a water supply component for introducing cooling liquid into the elastic bag tube (7) is also provided in the machine body (1).

2. The piston rod outer surface precision processing device according to claim 1, characterized in that: The ring knife seat (3) is C-shaped and the notch of the ring knife seat (3) faces upward. A sealing cover (9) is arranged in the notch of the ring knife seat (3). One side of the sealing cover (9) is hinged to one arcuate end of the ring knife seat (3), and the other side is buckled to the other arcuate end of the ring knife seat (3) through a quick buckle (10).

3. The piston rod outer surface precision processing device according to claim 1, characterized in that: The drive assembly comprises a motor bolted into the machine body (1) and electrically connected to a control system, a transmission screw being coaxially arranged on the output shaft of the motor, and the ring knife seat (3) being threadedly connected to the transmission screw.

4. The piston rod outer surface precision machining device according to claim 3, characterized in that: Proximity switches (11) electrically connected to a control system are arranged at positions near both ends of the transmission screw in the machine body (1), and sensing blocks (12) for being sensed by the proximity switches (11) are embedded on both axial sides of the ring knife seat (3).

5. The piston rod outer surface precision processing device according to claim 1, characterized in that: A plurality of clearance openings (301) are circumferentially formed on the circumferential outer wall of the ring knife seat (3); a screw rod (13) is hinged on the movable seat (6) for rotating into the clearance opening (301); and a horn nut (14) is threadedly connected on the screw rod (13) for tightening the ring knife seat (3) on the side of the movable seat (6) where the ring knife seat (3) is located.

6. The piston rod outer surface precision processing device according to claim 2, characterized in that: The water supply assembly comprises a water pump (81) arranged in the machine body (1) and electrically connected to the control system, and a circulating refrigerator (82) located at the bottom of the machine body (1) and used to cool the coolant. The sealing cover (9) is hollow inside and is connected to a plurality of nozzles (83) facing the workpiece to be processed. The water inlet end of the water pump (81) is connected to the circulating refrigerator (82), and the other end is connected to the inner cavity of the sealing cover (9) through a hose (84).

7. The piston rod outer surface precision processing device according to claim 1, characterized in that: There is a clearance fit between the workpiece to be processed and the fixing seat (5).

8. The piston rod outer surface precision machining device according to claim 1, characterized in that: A pull line (15) is arranged between the two movable seats (6), a reversing ring (16) is arranged on the fixed seat (5), the pull line (15) passes through the reversing ring (16), and a hook (17) for hanging the pull line (15) is arranged in the body (1).

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