Valve rod grinding machine

Abstract

The utility model belongs to the technical field of machining, and particularly relates to a valve rod grinding machine which comprises a base, the base is provided with two parallel grinding rollers through a sliding mechanism, the two grinding rollers are parallel to each other, and a receiving table is arranged under a gap formed between the two grinding rollers on the base; a pushing device is arranged on one side of a connecting line section between the two grinding rollers on the base, the pushing direction of the pushing device is parallel to the grinding rollers, the pushing device can push a workpiece located on the receiving table out of a gap formed between the two grinding rollers, a sensor is arranged on the upper surface of the receiving table, and the sensor is in signal connection with the pushing device; according to the valve rod grinding machine, the mode that the two grinding rollers with the axes parallel to each other are arranged on the base is adopted, the valve rod can be ground under the condition that a jig is not needed for fixing the valve rod, the time for fixing the valve rod and the time for disassembling the valve rod are saved, and therefore the problem that at present, the production efficiency of valve rod grinding is low is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of machining, and particularly relates to a valve rod grinding machine. BACKGROUND

[0002] After rough machining, the valve rod is generally larger than the process requirement (if the valve rod diameter is smaller than the process requirement after rough machining, it is a defective product because it cannot be repaired), and then grinding is performed to make the valve rod diameter meet the process requirement. At present, the valve rod is mainly ground by a lathe, but in some relatively precise fields, the valve rod diameter is very small, so it is troublesome and unrealistic to fix the valve rod when using the lathe because this will seriously reduce the production efficiency. Therefore, generally, the valve rod is placed on a jig, and then CNC is used for machining, which improves the efficiency compared with lathe machining, but the number of valve rods fixed on each jig is certain, and even the space in the machining chamber of the CNC is certain, so the machine needs to be stopped in time to take out the machined valve rod and put in the unprocessed valve rod, and therefore, the machining efficiency is still not high enough. CONTENT OF THE UTILITY MODEL

[0003] The application aims at the defects of the prior art, adopts the mode of arranging two grinding rollers with parallel axes on the base, designs a valve rod grinding machine, and can grind the valve rod without fixing the valve rod by a jig, thereby saving the time for fixing and disassembling the valve rod, and solving the problem of low production efficiency of grinding the valve rod.

[0004] To achieve the above object, the application provides the following technical scheme:

[0005] A valve rod grinding machine comprises a base, the base is provided with two parallel grinding rollers through a sliding mechanism, the two grinding rollers are parallel to each other, the two grinding rollers are parallel to the upper surface of the base, the central axes of the two grinding rollers are located at the same height, a receiving table is arranged below the gap formed between the two grinding rollers on the base, a pusher is arranged on one side of the connecting line segment between the two grinding rollers on the base, the pushing direction of the pusher is parallel to the grinding rollers, the lower surface of the execution end of the pusher is equal to or higher than the upper surface of the receiving table, the pusher can push the workpiece on the receiving table to the gap formed between the two grinding rollers, the upper surface of the receiving table is provided with a sensor, and the sensor is signal connected with the pusher.

[0006] Preferably, the sliding mechanism comprises a sliding rail, a movement controller and a roller frame, the sliding rail is fixedly arranged on the upper surface of the base, the sliding rail is parallel to the connecting line segment between the two polishing rollers, two roller frames are arranged between the two ends of the sliding rail, one polishing roller is arranged on one roller frame, and two movement controllers are fixedly arranged on the base.

[0007] Preferably, the movement controller comprises a screw rod, a fixed column and a rotating disc, the upper surface of the base is fixedly provided with the fixed column on the side away from the gap between the two polishing rollers, a threaded hole is arranged on each fixed column, the axis of the threaded hole is parallel to the sliding rail, one end of each screw rod is threadedly connected to the threaded hole of the corresponding fixed column, one end of each screw rod is rotatably connected to the corresponding roller frame, and a rotating disc is coaxially arranged on the end of each screw rod away from the corresponding roller frame.

[0008] Preferably, the receiving table extends to the outside of the end surface of the polishing roller at the end away from the pusher, and the upper surface of the pusher is lower than the middle axis of the two polishing rollers.

[0009] Preferably, the upper surface of the receiving table is provided with a groove, the two ends of the groove extend to the outside of the receiving table, and the length line of the groove is parallel to the polishing roller.

[0010] Preferably, the pusher comprises a pneumatic cylinder and a push plate, the pneumatic cylinder is fixedly arranged on the base, the pneumatic cylinder is parallel to the polishing roller, the free end of the piston rod of the pneumatic cylinder is fixedly provided with the push plate, the push plate is parallel to the polishing roller, the push plate is located in the gap between the two polishing rollers, the lower surface of the push plate is equal to or higher than the upper surface of the receiving table, and the sensor signal is connected to the pneumatic cylinder.

[0011] Preferably, the upper surface of the push plate is higher than the middle axis of the polishing roller, and the lower surface of the push plate is lower than the middle axis of the polishing roller.

[0012] Preferably, a guide plate is arranged outside the end of the gap between the two polishing rollers on the base, the height of the guide plate towards one end of the gap between the two polishing rollers is equal to the height of the side of the receiving table away from the pusher, and the guide plate towards one end of the gap between the two polishing rollers abuts against the side of the receiving table away from the pusher.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] The valve rod grinding machine is characterized in that two grinding rollers are arranged on the base and are parallel to each other, so that the valve rod can be ground without the need of a jig to fix the valve rod, thereby saving the time for fixing and dismounting the valve rod, and solving the problem of low production efficiency in grinding the valve rod. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the application;

[0016] Figure 2 It is Figure 1 It is a structural schematic diagram of the back;

[0017] Figure 3 It is a relationship diagram among the grinding roller, the receiving table, the pushing plate and the water spraying head in the application;

[0018] Figure 4 It is a principle diagram of the two grinding rollers in grinding the valve rod in the application.

[0019] 1, base; 2, grinding roller; 3, receiving table; 4, sliding rail; 5, roller frame; 6, screw rod; 7, fixing column; 8, rotating disc; 9, handle; 10, groove; 11, air cylinder; 12, pushing plate; 13, guide plate; 14, mechanical hand; 15, containing box; 16, valve rod; 17, motor; 18, sensor; 19, water spraying head; 20, mounting frame; 21, locking bolt. DETAILED DESCRIPTION

[0020] Participation Figures 1-4 A valve rod grinding machine comprises a base 1, the base 1 is provided with two parallel grinding rollers 2 through a sliding mechanism, the two grinding rollers 2 are parallel to each other, the two grinding rollers 2 are parallel to the upper surface of the base 1, the central axes of the two grinding rollers 2 are at the same height, a receiving table 3 is arranged below the gap formed between the two grinding rollers 2 on the base 1, a pusher is arranged on one side of the connecting line segment between the two grinding rollers 2 on the base 1, the pushing direction of the pusher is parallel to the grinding rollers 2, the lower surface of the execution end of the pusher is equal to or higher than the upper surface of the receiving table 3, the pusher can push the workpiece on the receiving table 3 out of the gap between the two grinding rollers 2, the upper surface of the receiving table 3 is provided with a sensor 18, and the sensor 18 is signal connected with the pusher.

[0021] In this embodiment, during use, the base 1 is installed, and then the relative positional relationship between the two grinding rollers 2 is adjusted according to the process standard via a sliding mechanism (theoretically, the diameter of the valve stem 16 is equal to the distance between the two grinding rollers 2, that is, the width of the gap between the two grinding rollers 2). After adjustment, the relative position of the two grinding rollers 2 is fixed, and then the grinding rollers 2 are started. Then, a robotic arm 14 located outside the base 1 (with the base 1 within the stroke range of the robotic arm 14) picks up the valve stem 16 and places it between the two grinding rollers 2. The two grinding rollers 2 then grind the valve stem 16. Figure 4 As shown, during use, one of the two grinding rollers 2 rotates along direction a and the other along direction b, causing the valve stem 16 being ground to rotate as well. This grinds the circumference of the valve stem 16. The valve stem 16 rotates under the action of the two grinding rollers 12. When the diameter of the valve stem 16 is ground to a preset value, it falls from the gap between the two grinding rollers 2 onto the receiving platform 3. The sensor 18 is a gravity sensor. When the sensor 18 detects the gravity, it transmits a signal to the pusher, which then pushes the valve stem 16 (now ground) off the receiving platform 3. This method is excellent. After installing the robotic arm 14, no manual labor is required, and no fixture for fixing the valve stem 16 is needed, saving time on fixing and disassembling the valve stem 16, thus improving production efficiency.

[0022] In a preferred embodiment, the sliding mechanism includes a slide rail 4, a movement controller, and a roller frame 5. The slide rail 4 is fixedly mounted on the upper surface of the base 1 and is parallel to the connecting line segment between the two grinding rollers 2. Two roller frames 5 are arranged between the two ends of the slide rail 4, and one grinding roller 2 is mounted on one roller frame 5. Both movement controllers are fixedly mounted on the base 1, and the execution end of one movement controller is fixedly connected to one roller frame 5.

[0023] With this setup, the relative positions of the two roller frames 5 after sliding on the slide rail 4 are controlled by the motion controller. After the sliding ends, the relative positions between the two roller frames 5 remain unchanged, thereby keeping the relative positions between the two grinding rollers 2 unchanged. Of course, each roller frame 5 is equipped with a motor 17, which is connected to the grinding roller 2.

[0024] As a preferred mode, the mobile controller comprises a screw rod 6, a fixed column 7, a rotating disc 8, the upper surface of the base 1 is fixedly provided with the fixed column 7 on the side of each of the roller frames 5 away from the gap between the two polishing rollers 2, each of the fixed columns 7 is provided with a threaded hole, the axis of the threaded hole is parallel to the slide rail 4, each of the fixed columns 7 is threadedly connected between the two ends of a screw rod 6 through the threaded hole, one end of each of the screw rods 6 is correspondingly rotationally connected with one of the roller frames 5, each of the screw rods 6 is coaxially provided with a rotating disc 8 at the end away from the corresponding roller frame 5, preferably, the rotating disc 8 is provided with a handle 9 at the end away from the fixed column 7 and away from the center, so that the worker can rotate the rotating disc 8 by holding the handle 9, and then rotate the screw rod 6, the rotation of the screw rod 6 makes the roller frame 5 slide on the slide rail 4, when the screw rod 6 stops rotating, the roller frame 5 also stops, preferably, the fixed column 7 is provided with a screw hole, one end of the screw hole is in communication with the threaded hole, the axis of the screw hole is perpendicular to the axis of the threaded hole, and a locking bolt 21 can be extended into the screw hole from outside the screw hole to contact the screw rod 6, so that after the relative distance between the two roller frames 5 is adjusted, the screw rod 6 is locked by the locking bolt 21 to prevent the rotation of the screw rod 6.

[0025] As a preferred mode, the receiving table 3 extends to the outside of the end surface of the polishing roller 2 at the end away from the pusher, and the upper surface of the pusher is lower than the central axis of the two polishing rollers 2. After being arranged in this way, when the polished valve rod 16 is pushed by the pusher, the valve rod 16 can be completely pushed out of the gap between the two polishing rollers 2.

[0026] As a preferred mode, the upper surface of the receiving table 3 is provided with a groove 10, both ends of the groove 10 extend to the outside of the receiving table 3, and the length line of the groove 10 is parallel to the polishing roller 2. The groove 10 is arranged to avoid the valve rod 16 falling from the upper surface of the receiving table 3.

[0027] As a preferred mode, the pusher comprises a pneumatic cylinder 11 and a push plate 12, the pneumatic cylinder 11 is fixedly arranged on the base 1, the pneumatic cylinder 11 is parallel to the polishing roller 2, the free end of the piston rod of the pneumatic cylinder 11 is fixedly arranged with the push plate 12, the push plate 12 is parallel to the polishing roller 2, the push plate 12 is located in the gap between the two polishing rollers 2, the lower surface of the push plate 12 is equal to or higher than the upper surface of the receiving table 3, and the sensor 18 is signal connected with the pneumatic cylinder 11. After being arranged in this way, the pneumatic cylinder 11 is elongated, so that the push plate 12 pushes the valve rod 16 on the receiving table 3 out of the receiving table 3.

[0028] As a preferred mode, the upper surface of the pushing plate 12 is higher than the central axis of the grinding roller 2, and the lower surface of the pushing plate 12 is lower than the central axis of the grinding roller 2. After such arrangement, when the robot 14 places the valve stem 16 between the two grinding rollers 2, the side of the pushing plate 12 facing away from the cylinder 11 can play a limiting role, preventing the robot 14 from placing the valve stem 16 into the gap between the two grinding rollers 3 and between the receiving platform 3 and the cylinder, because if the valve stem 16 is placed here, the polished valve stem 16 will fall out and fall off the receiving platform 3.

[0029] As a preferred mode, the base 1 is provided with a guide plate 13 at one end of the gap between the two grinding rollers 2, the guide plate 13 is higher towards one end of the gap between the two grinding rollers 2 than the height of the other end of the gap between the two grinding rollers 2, and the guide plate 13 abuts against the side of the receiving platform 3 facing away from the pusher towards one end of the gap between the two grinding rollers 2. After arranging the guide plate 13, the valve stem 16 pushed out of the receiving platform 2 by the pushing plate 12 will fall onto the guide plate 13. In use, a storage box 15 can be placed directly below the end of the guide plate 13 facing away from the grinding roller 2 on the base 1, so as to store the polished valve stem 16.

[0030] Preferably, the base 1 is further provided with a mounting rack 10, and the mounting rack 10 is provided with a water spraying head 19 above the receiving platform 3 and at the gap between the two grinding rollers 2, so as to prevent dust from flying during grinding by means of water spraying.

Claims

1. A valve stem sander characterized by, The utility model provides a polishing device, including base (1), base (1) is equipped with two parallel polishing rollers (2) through sliding mechanism, two polishing rollers (2) are parallel to each other, two polishing rollers (2) are parallel to the upper surface of base (1), the central axis of two polishing rollers (2) is at the same height, the gap formed between two polishing rollers (2) is provided with the interface platform (3) below base (1), one side of the connecting line segment between two polishing rollers (2) is provided with the pusher on base (1), the push direction of pusher is parallel to polishing roller (2), the lower surface of the execution end of pusher is equal to or higher than the upper surface of interface platform (3), pusher can push the workpiece on interface platform (3) to the gap formed between two polishing rollers (2) outside, the upper surface of interface platform (3) is provided with sensor (18), sensor (18) is signal connected with pusher.

2. A valve stem sander as defined in claim 1, wherein, The sliding mechanism includes slide rail (4), movement controller, roller frame (5), the slide rail (4) is fixedly arranged on the upper surface of base (1), the slide rail (4) is parallel to the connecting line segment between two polishing rollers (2), two roller frames (5) are arranged between the two ends of slide rail (4), one polishing roller (2) is arranged on one roller frame (5), two movement controllers are fixedly arranged on base (1), and the execution end of one movement controller is fixedly connected with one roller frame (5).

3. A valve stem sander as defined in claim 2 wherein, The movement controller includes screw rod (6), fixed column (7), rotating disc (8), the upper surface of base (1) is fixedly provided with fixed column (7) on the side of each roller frame (5) away from the gap between two polishing rollers (2), each fixed column (7) is provided with a threaded hole, the axis of threaded hole is parallel to slide rail (4), each fixed column (7) is threadedly connected with the two ends of one screw rod (6) through the threaded hole, one end of each screw rod (6) is rotatably connected with one roller frame (5), and one rotating disc (8) is coaxially arranged on the end of each screw rod (6) away from the corresponding roller frame (5).

4. A valve stem sander as defined in claim 1 wherein, The end of interface platform (3) away from pusher extends to the end face outside polishing roller (2), and the upper surface of pusher is lower than the central axis of two polishing rollers (2).

5. A valve stem sander as defined in claim 2 wherein, The upper surface of interface platform (3) is provided with recess (10), both ends of recess (10) extend to the outside of interface platform (3), and the length line of recess (10) is parallel to polishing roller (2).

6. A valve stem sander as defined in claim 1 wherein, The pusher comprises a cylinder (11) and a push plate (12), the cylinder (11) is fixed on the base (1), the cylinder (11) is parallel to the polishing roller (2), the free end of the piston rod of the cylinder (11) is fixed with the push plate (12), the push plate (12) is parallel to the polishing roller (2), the push plate (12) is located in the gap between the two polishing rollers (2), the lower surface of the push plate (12) is equal to or higher than the upper surface of the receiving table (3), and the sensor (18) is signal connected with the cylinder (11).

7. A valve stem sander as defined in claim 6 wherein, The upper surface of the push plate (12) is higher than the central axis of the polishing roller (2), and the lower surface of the push plate (12) is lower than the central axis of the polishing roller (2).

8. A valve stem sander as defined in claim 1 wherein, The base (1) is provided with a guide plate (13) at one end of the gap between the two polishing rollers (2), the height of the guide plate (13) towards one end of the gap between the two polishing rollers (2) is higher than the height of the guide plate (13) away from one end of the gap between the two polishing rollers (2), and the guide plate (13) towards one end of the gap between the two polishing rollers (2) abuts against one side of the receiving table (3) away from the pusher.

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