Precision Machining Device for the Outer Surface of the Piston Rod

Abstract

This application relates to the field of component processing, and particularly to a device for precision machining of the outer surface of a piston rod, which includes a machine body, a clamping member arranged inside the machine body and used for clamping the end of the workpiece to be processed, a ring cutter seat slidably arranged on the machine body, a driving component used for driving the ring cutter seat to move along the axial direction of the workpiece to be processed, a cutter arranged on the ring cutter seat for turning the workpiece to be processed, fixed seats for the workpiece to be processed to slide through are arranged on both sides of the machine body axially 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 closely attached to and detachably connected to the ring cutter seat, an elastic bladder tube is arranged between the movable seat and the corresponding fixed seat, and a water supply component for introducing coolant into the elastic bladder tube is also arranged inside the machine body. This application has the advantage of improving the machining accuracy 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 device for precision processing the outer surface of a piston rod. Background Art

[0002] The piston rod is a connecting component that supports the piston in doing 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 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 piston rod outer surface, the present application provides a piston rod outer surface precision machining device.

[0006] The present application provides a device for precision machining of the outer surface of a piston rod, which adopts the following technical solution:

[0007] A device for precision machining the outer surface of a piston rod comprises a body, a clamping part arranged in the body and used to clamp the end of a workpiece to be machined, a ring cutter seat and a driving component 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 sliding the workpiece to be machined through are arranged on both sides of the body relative to the axial direction of 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 component for introducing coolant into the elastic bag tube is also provided in the body; when the two movable seats are tightly against the ring cutter seat, the water supply component injects coolant into the cavity enclosed by the movable seat, the ring cutter seat and the elastic bag tube to immerse the workpiece.

[0008] By adopting the above technical solution, the workpiece to be processed passes through the two fixed seats and its end is clamped by the clamping member. The movable seat is close to and connected to the annular cutter seat, and the elastic bladder tube is stretched. The starting device is activated, the clamping member drives the workpiece to be processed to rotate, the driving component drives the annular cutter seat to move, and the cutter on the annular cutter 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 bladder tubes and the annular cutter seat with coolant, so that the processing part of the workpiece to be processed is immersed in the coolant throughout the processing process, reducing the possibility of the workpiece to be processed expanding due to heat, and thus improving the processing accuracy of the outer surface of the workpiece to be processed.

[0009] Optionally, the annular cutter seat is C-shaped and the notch of the annular cutter seat faces upward. A sealing cover is arranged in the notch of the annular cutter seat. One side of the sealing cover is hinged to one end of the annular cutter seat in the arc direction, and the other side is buckled to the other end of the annular cutter seat in the arc direction through a quick buckle.

[0010] By adopting the above technical solution, the hinging of the sealing cover and the annular cutter seat facilitates the loading and unloading of the workpiece to be processed between the movable seat, the fixed seat and the annular cutter seat, and can reduce the possibility of coolant overflowing from the notch of the annular cutter seat.

[0011] Optionally, the driving component includes a motor bolted in the machine body and electrically connected to the control system. A transmission screw rod is coaxially arranged on the output shaft of the motor, and the annular cutter seat is threadedly connected to the transmission screw rod.

[0012] By adopting the above technical solution, the control system starts the motor, the output shaft of the motor drives the transmission screw rod to rotate, and the transmission screw rod drives the annular cutter seat to move through the thread, thereby realizing the feeding and retracting of the cutter.

[0013] Optionally, proximity switches electrically connected to the control system are arranged at both ends of the transmission screw rod in the machine body. Induction blocks for being sensed by the proximity switches are embedded on both sides of the annular cutter seat in the axial direction.

[0014] By adopting the above technical solution, when the annular cutter seat drives the induction block to move close to the proximity switch, the proximity switch can sense the induction block, thereby restricting the moving range of the annular cutter seat.

[0015] Optionally, a plurality of relief openings are circumferentially formed on the outer circumferential side wall of the annular cutter seat. A screw rod for turning into the relief openings is hinged on the movable seat, and a sheep's horn nut for pressing against the side of the annular cutter seat opposite to the movable seat where it is located is threadedly connected to the screw rod.

[0016] By adopting the above technical solution, after the movable seat and the annular cutter seat are closely attached, the worker manually turns the screw rod into the corresponding relief opening, and then tightens the sheep's horn nut, thereby realizing the quick disassembly and assembly between the movable seat and the annular cutter seat.

[0017] Optionally, the water supply component includes a water pump disposed inside the machine body and electrically connected to the control system, and a circulating refrigerator located at the bottom of the machine body for refrigerating the coolant. The sealing cover is hollow inside and is connected to a plurality of nozzles facing the workpiece to be machined. 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.

[0018] By adopting the above technical solution, the coolant that has absorbed heat from the workpiece to be machined flows back to the bottom of the machine body, and the circulating refrigerator refrigerates the coolant again. The water pump sends the coolant produced by the circulating refrigerator back into the sealing cover, and then it is sprayed onto the workpiece to be machined by the nozzles. The coolant circulates for refrigeration, further improving the machining accuracy of the outer surface of the piston rod.

[0019] Optionally, there is a clearance fit between the workpiece to be machined and the fixed seat.

[0020] By adopting the above technical solution, the coolant in the elastic bladder tube flows out from the gap between the workpiece to be machined and the fixed seat, realizing continuous cooling of the workpiece to be machined during the machining process.

[0021] Optionally, a wire is tied between the two movable seats. A reversing ring is arranged on the ring knife seat. The wire passes through the reversing ring, and a hook for hanging the wire is arranged inside the machine body.

[0022] By adopting the above technical solution, the worker manually pulls the wire and hangs it on the hook, realizing that the movable seat approaches the ring knife seat, which is convenient and labor-saving to operate.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The workpiece to be machined passes through the two fixed seats and the end is clamped by the clamping member. The movable seat approaches the ring knife seat and is connected to it, and the elastic bladder tube is stretched. The device is started, the clamping member drives the workpiece to be machined to rotate, the driving component drives the ring knife seat to move, and the tool on the ring knife seat machines the outer surface of the workpiece to be machined. During the machining process, the water supply component fills the cavity enclosed by the two elastic bladder tubes and the ring knife seat with coolant. Thus, the machining part of the workpiece to be machined is immersed in the coolant throughout the machining process, reducing the possibility of the workpiece to be machined expanding due to heat, and further improving the machining accuracy of the outer surface of the workpiece to be machined;

[0025] 2. The coolant that has absorbed heat from the workpiece to be machined flows back to the bottom of the machine body, and the circulating refrigerator refrigerates the coolant again. The water pump sends the coolant produced by the circulating refrigerator back into the sealing cover, and then it is sprayed onto the workpiece to be machined by the nozzles. The coolant circulates for refrigeration, further improving the machining accuracy of the outer surface of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the present application.

[0027] Figure 2 It is an exploded view among the core cutter seat, the movable seat and the fixed seat in the embodiment of the present application.

[0028] Explanation of the reference numerals: 1, machine body; 2, clamping member; 3, core cutter seat; 301, relief opening; 4, cutter; 5, fixed seat; 6, movable seat; 7, elastic bladder tube; 81, water pump; 82, circulation refrigerator; 83, nozzle; 84, hose; 9, sealing cover; 10, quick buckle; 11, proximity switch; 12, induction block; 13, screw rod; 14, sheep horn nut; 15, stay wire; 16, reversing ring; 17, hook. Specific embodiments

[0029] The following will Figure 1-2 further elaborate on the present application in conjunction with the attached drawings.

[0030] The embodiment of the present application discloses a device for precision machining of the outer surface of a piston rod.

[0031] Referring to Figure 1 , the device for precision machining of the outer surface of a piston rod includes a machine body 1 and a clamping member 2 arranged inside the machine body 1 and used for sucking and clamping the end of the workpiece to be machined. The clamping member 2 directly adopts a three-jaw chuck and the like in the prior art.

[0032] Referring to Figure 1 and Figure 2 , a core cutter seat 3 and a driving component for driving the core cutter seat 3 to move along the axial direction of the workpiece to be machined are slidably arranged inside the machine body 1. The driving component includes a motor (not shown in the figure) bolted inside the machine body 1 and electrically connected to the control system. A transmission screw rod (not shown in the figure) is coaxially arranged on the output shaft of the motor. The core cutter seat 3 is threadedly connected to the transmission screw rod.

[0033] The motor adopts a 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 rod to rotate. The transmission screw rod drives the core cutter seat 3 to move through the thread. A cutter 4 for turning the outer surface of the workpiece to be machined is bolted on the core cutter seat 3. In this way, the driving component realizes the feeding and retracting of the cutter 4 through the core cutter seat 3.

[0034] Referring to Figure 1 and Figure 2 , proximity switches 11 electrically connected to the control system are bolted at positions near both ends of the transmission screw rod inside the machine body 1. Induction blocks 12 for being sensed by the proximity switches 11 are embedded on both sides of the core cutter seat 3 axially.

[0035] When the core cutter 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 induction blocks 12 cooperate to limit and constrain the maximum movement range of the core cutter seat 3.

[0036] Refer to Figure 1 and Figure 2 The core bit holder 3 is C-shaped and the notch of the tool changing seat faces upward. A sealing cover 9 is arranged in the notch of the core bit holder 3. One side of the sealing cover 9 is hinged to one end of the core bit holder 3 in the arc direction, and the other end is buckled to the other end of the core bit holder 3 in the arc direction through a quick buckle 10.

[0037] The worker manually unlocks the quick buckle 10 and turns the sealing cover 9 away from the notch of the core bit holder 3. After that, the operation of disassembling and assembling the workpiece is convenient, which is beneficial to improving the processing efficiency of the workpiece.

[0038] Refer to Figure 1 and Figure 2 On both sides of the core bit holder 3 in the axial direction in the machine body 1, there are fixed seats 5 for the workpiece to be processed to slide through. There is a clearance fit between the workpiece to be processed and the fixed seat 5. A movable seat 6 is arranged between the fixed seat 5 and the core bit holder 3 in a sliding manner, and the movable seat 6 is detachably connected to the core bit holder 3.

[0039] Refer to Figure 1 and Figure 2 On the circumferential outer side wall of the core bit holder 3, a plurality of relief openings 301 are circumferentially opened. A screw 13 for turning into the relief opening 301 is hinged on the movable seat 6, and a sheep's horn nut 14 for pressing against the side of the core bit holder 3 opposite to the movable seat 6 where it is located is threadedly connected to the screw 13.

[0040] Refer to Figure 1 and Figure 2 An elastic bladder tube 7 is adhesively bonded between the movable seat 6 and the corresponding fixed seat 5. After the workpiece to be processed is clamped, the worker manually moves the movable seat 6 close to the core bit holder 3, and then assembles the movable seat 6 and the core bit holder 3 through the screw 13 and the sheep's horn nut 14. During this process, the elastic bladder tube 7 is stretched.

[0041] A wire 15 is tied between the two movable seats 6. Two reversing rings 16 are welded on the core bit holder 3. The wire 15 passes through the reversing rings 16. A hook 17 for hanging the wire 15 is welded in the machine body 1. The worker manually pulls the wire 15 and hangs it on the hook 17, so that the movable seat 6 quickly approaches the core bit holder 3, and the operation is convenient and labor-saving.

[0042] Refer to Figure 1 and Figure 2 A water supply component for injecting coolant into the elastic bladder tube 7 is also arranged in the machine body 1. The water supply component includes a water pump 81 bolted to the bottom of 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 for refrigerating the coolant.

[0043] The inside of the sealing cover 9 is hollow 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 water outlet end of the water pump 81 is connected to the inner cavity of the sealing cover 9 through a hose 84.

[0044] Referring to 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 machine body 1, and the water pump 81 sends the cooled coolant into the sealing cover 9, and then the coolant is ejected from the nozzles 83 onto the workpiece to be processed.

[0045] During the entire processing of the workpiece to be processed, the cavity enclosed by the two elastic bladder tubes 7 and the tool holder 3 is filled with coolant, the workpiece to be processed 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 to be processed and the fixed seat 5.

[0046] The implementation principle of the outer surface precision machining device for the piston rod in the embodiment of the present application is as follows:

[0047] The worker manually unlocks the quick buckle 10, turns the sealing cover 9 away from the notch of the tool holder 3, then passes the end of the workpiece to be processed through the fixed seat 5 and is clamped by the clamping member 2, and then buckles the sealing cover 9 and the tool holder 3 tightly through the quick buckle 10.

[0048] Then, manually hang the pull wire 15 on the hook 17, move the movable seat 6 close to the tool holder 3, and screw the screw rod 13 into the corresponding relief opening 301 and tighten the toggle nut 14.

[0049] The control system starts the motor, the output shaft of the motor drives the transmission screw rod to rotate, and the transmission screw rod drives the tool holder 3 to move through the thread, so as to realize the feeding and retracting of the tool 4.

[0050] At the same time, the circulating refrigerator 82 cools the coolant at the bottom of the machine body 1, and the water pump 81 sends the cooled coolant into the sealing cover 9, and then the coolant is ejected from the nozzles 83 onto the workpiece to be processed. The coolant after absorbing heat flows back to the bottom of the machine body 1 from the gap between the workpiece to be processed and the fixed seat 5.

[0051] During the entire processing process, the cavity enclosed by the two elastic bladder tubes 7 and the tool holder 3 is filled with coolant, and the workpiece to be processed is immersed in the coolant.

[0052] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A device for precision machining the outer surface of a piston rod, comprising a body (1), and a clamping member (2) arranged in the body (1) and used to clamp the end of a workpiece to be machined, characterized in that: A ring cutter seat (3) and a driving assembly 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 assembly for introducing cooling liquid into the elastic bag tube (7) is further provided in the machine body (1); when the two movable seats (6) are tightly attached to the ring cutter seat (3), the water supply assembly injects cooling liquid into the cavity enclosed by the movable seat (6), the ring cutter seat (3) and the elastic bag tube (7) to immerse the workpiece.

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 the control system, the output shaft of the motor is coaxially arranged with a transmission screw, and the ring knife seat (3) is 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 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 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 facing away from the movable seat (6) where the ring knife seat (3) is located.

6. The piston rod outer surface precision machining 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 refrigeration machine (82) located at the bottom of the machine body (1) and used to refrigerate the coolant. The interior of the sealing cover (9) is hollow and connected to a plurality of nozzles (83) directed toward the workpiece to be processed. The water inlet end of the water pump (81) is connected to the circulating refrigeration machine (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 machining 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 connected between the two movable seats (6), a reversing ring (16) is arranged on the ring knife seat (3), the pull line (15) passes through the reversing ring (16), and a hook (17) for hanging the pull line (15) is arranged in the machine body (1).

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