A valve core grinding machine

Abstract

The present invention discloses a valve core grinding machine, comprising: a grinding device for grinding the outer surface of the valve core; a feeding mechanism for conveying the valve cores one by one into the grinding device; a discharging mechanism for detecting the diameter of the ground valve cores and storing them in categories according to the detection results; the feeding mechanism comprises a feeding assembly and a conveying assembly, the feeding assembly is used to feed the valve cores one by one into the conveying assembly, and the conveying assembly is used to feed the valve cores into the grinding machine equipment; the feeding mechanism of the present invention realizes one-by-one feeding, and the discharging mechanism is combined with online diameter detection, which greatly improves the product processing efficiency and reduces the number of shutdowns. Two feeding plates are used to run alternately, and a lifting part and a guide groove are set on the feeding plate to cooperate with each other to realize one-by-one feeding of the valve core, effectively avoiding the increase of the defective rate of the valve core caused by multiple feedings. A diameter measuring assembly and a material dividing assembly are set at the discharge port of the guide pipe to realize diameter detection and classified storage during the discharging process, which greatly improves the production efficiency.

Description

Technical Field

[0001] The invention relates to the field of valve core production equipment, and in particular to a valve core grinding machine. Background Art

[0002] During the production process of the valve core, the surface of the valve core needs to be fine-machined through the grinding process to make its surface meet the precision requirements of the process. The valve cores need to be fed into the grinding equipment one by one. If multiple valve cores are fed at the same time during grinding, the valve cores will interfere with each other, causing surface damage and unqualified products; there is even the possibility of damage to the grinding disc; and the existing feeding mechanism cannot guarantee feeding one by one. In addition, after the valve core is processed by the grinding equipment, the size of the valve core needs to be measured; usually the processed valve core needs to be collected and sent to a specific testing equipment for testing, which will greatly reduce the detection efficiency and increase the processing time of the parts. Summary of the invention

[0003] In view of the defects of the above prior art, the main purpose of the present invention is to overcome the shortcomings of the prior art and disclose a valve core grinding machine, comprising:

[0004] Grinding equipment to grind the outer surface of the valve core;

[0005] A feeding mechanism for conveying the valve cores one by one into the grinding device;

[0006] The unloading mechanism detects the diameter of the valve core after grinding and stores it according to the test results;

[0007] The feeding mechanism comprises a feeding assembly and a conveying assembly, the feeding assembly is used to feed the valve cores into the conveying assembly one by one, and the conveying assembly is used to feed the valve cores into the grinding machine equipment;

[0008] The material discharge mechanism comprises a second bracket, a material guide pipe, a material discharge assembly, a diameter measuring assembly and a material separation assembly. The material guide pipe is tiltedly arranged on the second bracket. The material feed end of the material guide pipe is connected to the grinding device, and the material discharge end is sequentially connected to the diameter measuring assembly and the material separation assembly. The material discharge assembly is arranged on the material guide pipe, and the material discharge assembly is used to discharge the material one by one; the diameter measuring assembly is used to measure the diameter of the valve core; and the material separation assembly is used to classify and guide the valve core into qualified and unqualified valve cores;

[0009] The material distribution assembly includes two material distribution pipes, a temporary storage pipe, a third stopper, a fifth cylinder and a sixth cylinder, the fifth cylinder is fixed on the second bracket, the temporary storage pipe is installed on the fifth cylinder, and the initial position of the temporary storage pipe is located at the extension of the discharge port of the diameter measuring assembly; the temporary storage pipe is controlled by the fifth cylinder to move horizontally to switch between the two material distribution pipes, and the two material distribution pipes are respectively connected to a qualified storage box and an unqualified storage box; an opening is set on the temporary storage pipe, and the third stopper is controlled by the sixth cylinder to control the opening and closing of the temporary storage pipe.

[0010] Furthermore, the feeding assembly includes a first bracket, a hopper, a first feeding plate, a second feeding plate, a first driving member and a second driving member. The hopper is used to hold the valve core, the first feeding plate is stacked on the second feeding plate, the second feeding plate is stacked on the inner wall of a side plate of the hopper, and the inner wall of the side plate is an inclined surface. The first driving member and the second driving member are respectively used to control the first feeding plate and the second feeding plate to reciprocate up and down along the side plate. A lifting portion is provided at the upper end of the first feeding plate, and the valve core is lifted and moved upward by the lifting portion; a first material guide groove allowing a single valve core to pass through is provided on the second feeding plate, the valve core is fed into the first material guide groove by the first feeding plate, and the second feeding plate is driven by the second driving member to move upward, so as to drive the valve core to move to the side plate higher than the hopper, so that the valve cores fall into the conveying assembly one by one.

[0011] Furthermore, a guide hole is provided at the bottom of the hopper, a stirring rod is slidably provided in the guide hole, the stirring rod is connected to the first driving member, and the first driving member is used to drive the stirring rod and the first feeding plate to move up and down synchronously; at least one stirring rod is provided.

[0012] Furthermore, the lifting portion is an inclined surface inclined toward the second feeding plate.

[0013] Furthermore, the thickness of the first material guiding groove is only sufficient to stack one valve core.

[0014] Furthermore, the conveying assembly includes a belt conveyor and a material guide plate, the material guide plate is installed on the belt conveyor, and a second material guide groove converging to the middle is provided on the material guide plate; the second material guide groove is used to guide the valve core to fall onto the belt conveyor and move along the length direction of the second material guide groove.

[0015] Furthermore, the discharge assembly includes a first cylinder, a second cylinder, a first stopper and a pressure block. An opening is set on the guide tube, and the pressure block is set above the opening. The first cylinder is used to drive the pressure block to move along the circumference of the guide tube, and the pressure block is used to press the valve core into the guide tube; the first stopper is set at the discharge end of the guide tube, and the first stopper is connected to the second cylinder. The second cylinder is used to control the first stopper to control the opening and closing of the discharge end of the guide tube.

[0016] Furthermore, the discharge assembly also includes two groups of proximity switches, which are respectively installed on one side of the pressing block close to the feed end of the material guide tube and between the pressing block and the first stop block; and openings are set at corresponding positions of the material guide tube, and the proximity switches are used to detect whether there is a valve core in the material guide tube.

[0017] Furthermore, it also includes an anti-jamming component, which includes a hammer head and a third cylinder. The third cylinder is used to control the reciprocating movement of the hammer head to knock the outer wall of the guide tube.

[0018] Furthermore, the diameter measuring assembly includes a measuring tube, a sensor, a second stopper and a fourth cylinder. The measuring tube is arranged at the extension of the material guide tube. An opening is arranged on the side of the measuring tube. The sensor is used to measure the diameter of the valve core through the opening. The second stopper is arranged at the outlet end of the measuring tube. The fourth cylinder is connected to the second stopper. The fourth cylinder is used to drive the second stopper to control the opening and closing of the measuring tube.

[0019] Beneficial effects achieved by the present invention:

[0020] The feeding mechanism of the present invention can realize one-by-one feeding, and the unloading mechanism is combined with online diameter detection, which greatly improves the product processing efficiency and reduces the number of shutdowns. Two feeding plates are used to run alternately, and a lifting part and a material guide groove are arranged on the feeding plate to cooperate with each other to realize one-by-one feeding of the valve core, effectively avoiding the increase of the defective rate of the valve core caused by multiple feedings. A diameter measuring component and a material dividing component are arranged at the discharge port of the guide pipe to realize diameter detection and classified storage during the unloading process, which greatly improves production efficiency and reduces production costs. An anti-stuck component is arranged at the guide pipe to promote the valve core to pass through the guide pipe smoothly by hammering to avoid the phenomenon of stuck material. The stopper and the pressure block are cooperated to realize the one-by-one discharge of the guide pipe to avoid blockage at the diameter detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the distribution of a valve core grinding machine of the present invention;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the feeding mechanism;

[0023] Figure 3 for Figure 2 A top view of

[0024] Figure 4 for Figure 3 Middle AA section view;

[0025] Figure 5 for Figure 4 A magnified view of middle;

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the feeding component;

[0027] Figure 7 for Figure 6 A magnified view of middle;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the conveying component;

[0029] Fig. 9 It is a three-dimensional structural schematic diagram of the material discharging mechanism;

[0030] Fig.10 for Fig. 9 A schematic diagram of a three-dimensional structure from another perspective;

[0031] Fig.11 It is a schematic diagram of the coordination between the material discharge component and the material guide pipe;

[0032] Fig.12 for Fig.11 A magnified view of middle;

[0033] Fig.13 It is a schematic diagram of the three-dimensional structure of the diameter measurement component;

[0034] Fig.14 It is a three-dimensional structural schematic diagram of the material distribution component;

[0035] The reference numerals are as follows:

[0036] 1. Grinding equipment, 2. Loading mechanism, 3. Unloading mechanism, 21. Feeding assembly, 22. Conveying assembly, 211. First bracket, 212. Hopper, 213. First feeding plate, 214. Second feeding plate, 215. First driving member, 216. Second driving member, 217. Agitating rod, 2121. Side plate, 2131. Lifting part, 2132. Discharging part, 2141. First guide trough, 221. Belt conveyor, 222. Guide plate, 2221. Second guide trough, 22211. First guide part, 22212. Second guide Toward part, 31, second bracket, 32, material guide pipe, 33, discharge assembly, 34, diameter measuring assembly, 35, material distribution assembly, 36, anti-stuck assembly, 331, first cylinder, 332, second cylinder, 333, first stopper, 334, pressure block, 335, proximity switch, 341, measuring tube, 342, sensor, 343, second stopper, 344, fourth cylinder, 351, material distribution pipe, 352, temporary storage tube, 353, third stopper, 354, fifth cylinder, 355, sixth cylinder, 361, hammer head, 362, third cylinder. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] A valve core grinding machine, such as Figure 1 As shown, including:

[0039] Grinding equipment 1, grinding the outer surface of the valve core;

[0040] A feeding mechanism 2 is used to transport the valve cores one by one into the grinding device;

[0041] The unloading mechanism 3 detects the diameter of the valve core after grinding and stores it according to the classification results.

[0042] Among them, the general equipment of grinding equipment will not be elaborated in detail here.

[0043] Specifically, Figure 2 As shown, the feeding mechanism 2 includes a feeding assembly 21 and a conveying assembly 22. The feeding assembly 21 is used to feed the valve cores into the conveying assembly 22 one by one, and the conveying assembly 22 is used to feed the valve cores into the grinding machine equipment.

[0044] like Figure 9-14As shown, the unloading mechanism 3 includes a second bracket 31, a guide pipe 32, a discharge assembly 33, a diameter measuring assembly 34 and a dividing assembly 35. The guide pipe 32 is tiltedly arranged on the second bracket 31. The feed end of the guide pipe 32 is connected to the grinding equipment, and the discharge end is sequentially connected to the diameter measuring assembly 34 and the dividing assembly 35. The discharge assembly 33 is arranged on the guide pipe 32, and the valve cores are discharged one by one by the discharge assembly 33; wherein the guide pipe 32 plays the role of temporarily storing the valve core, and at the same time guides the movement of the valve core to guide it into the diameter measuring assembly 34. The valve cores are measured one by one through the diameter measuring assembly 34; and selectively stored through the dividing assembly 35 according to the detection structure, that is, qualified valve cores are guided into qualified storage boxes, and unqualified valve cores are guided into unqualified storage boxes.

[0045] In one embodiment, if Figure 2-Figure 8 As shown, the feeding assembly 21 includes a first bracket 211, a hopper 212, a first feeding plate 213, a second feeding plate 214, a first driving member 215 and a second driving member 216. The hopper is used to hold the valve core. The first feeding plate 213 is stacked on the second feeding plate 214. The second feeding plate 214 is stacked on the inner wall of a side plate 2121 of the hopper 212, and the inner wall of the side plate 2121 is an inclined surface. The first driving member 215 and the second driving member 216 are used to control the first feeding plate 213 and the second feeding plate 214 to reciprocate up and down along the side plate 2121. A lifting portion 2131 is provided at the upper end of the first feeding plate 213, and the valve core is lifted and moved upward by the lifting portion 2131. A first material guide groove 2141 is provided on the second feeding plate 214 to allow a single valve core to pass through. The valve core is fed into the first material guide groove 2141 by the first feeding plate 213, and the second driving member 216 is used to drive the second feeding plate 214 to move upward, so as to drive the valve core to move to a side plate 2121 higher than the hopper 212, so that the valve cores fall into the conveying assembly 22 one by one.

[0046] In one embodiment, if Figure 2-Figure 8As shown, the lifting portion 2131 is an inclined surface inclined toward the second feeding plate 214. A V-shaped groove is formed between the lifting portion 2131 and the second feeding plate 214 to lift the valve core. In order to realize the conveying of valve cores one by one, only one valve core can be axially stored on the lifting portion 2131, but in the feeding process, stacking is inevitable, that is, two or more valve cores are stacked on the lifting portion 2131; therefore, the size of the first guide groove 2141 is set to allow only a single valve core to pass through. When the first feeding plate 213 pushes the valve core to move upward along the second feeding plate 214, it reaches the first guide groove 2141, and one valve core falls into the first guide groove 2141, while other valve cores cannot fall into the first guide groove 2141 and will move downward with the first feeding plate 213. The second driving member 216 drives the second feeding plate 214 to move. When the second feeding plate 214 is at the initial position, one end of the first guide groove 2141 is blocked by the side plate 2121 of the hopper 212. Therefore, the valve core is temporarily stored in the first guide groove 2141. When the second feeding plate 214 moves upward until the first guide groove 2141 is opened, the valve core slides out along the first guide groove 2141 into the conveying assembly 22. In addition, a guide plate can be installed on the side plate 2121 of the hopper 212 to guide the valve core that slides out of the first guide groove 2141 into the conveying assembly 22.

[0047] In the above embodiment, if Figure 2-Figure 8 As shown, the first driving member 215 and the second driving member 216 are cylinders.

[0048] In one embodiment, if Figure 2-Figure 8 As shown, a guide hole is provided at the bottom of the hopper 212, and a stirring rod 217 is slidably provided in the guide hole. The stirring rod 217 is connected to the first driving member 215, and the first driving member 215 is used to drive the stirring rod 217 and the first feeding plate 213 to move up and down synchronously. The stirring rod 217 cooperates with the guide hole to assist in guiding the first feeding plate 213 to move up and down; at the same time, the stirring rod 217 extends into the hopper 212, and can stir the valve core in the hopper 212 to avoid the valve cores getting stuck, which causes the first feeding plate 213 to be unable to reliably transmit the valve core.

[0049] In the above embodiment, if Figure 2-Figure 8 As shown, the number of stirring rods 217 is not limited to one, and two or more stirring rods 217 may be provided. Preferably, the number of stirring rods 217 is two. The two stirring rods 217 are arranged at intervals.

[0050] In one embodiment, if Figure 2-Figure 8As shown, a discharge portion 2132 is provided on the side of the lifting portion 2131, and the discharge portion 2132 is an inclined surface inclined toward the inner cavity of the hopper; the discharge portion 2132 is used to prevent the valve core located at the discharge portion 2132 from moving upward with the first feeding plate 213. Through the cooperation of the discharge portion 2132 and the lifting portion 2131, the first feeding plate 213 can only axially carry one valve core at a time.

[0051] In one embodiment, if Figure 2-Figure 8 As shown, the thickness of the first material guide groove 2141 can only stack one valve core. The thickness of the first material guide groove 2141 is determined by the thickness of the second feeding plate 214; when the second feeding plate 214 is in the initial position, the lower end of the first material guide groove 2141 is blocked by the side plate of the hopper 212, and the first material guide groove 2141 forms a storage groove open in one direction, which can only stack and accommodate one valve core, thereby realizing the feeding of valve cores one by one.

[0052] In one embodiment, if Figure 2-Figure 8 As shown, the conveying assembly 22 includes a belt conveyor 221 and a guide plate 222. The guide plate 222 is installed on the belt conveyor 221. The guide plate 222 is provided with a second guide groove 2221 that converges toward the middle. The second guide groove 221 is used to guide the valve core to fall onto the belt conveyor 221 and move along the length direction of the second guide groove 2221. Specifically, the second guide groove 2221 consists of two parts, including a first guide portion 22211 and a second guide portion 22212. The first guide portion 22211 includes two inclined surfaces that converge from top to bottom and from outside to inside. The valve core is guided to move toward the second guide portion 22212 through the first guide portion 22211. The second guide portion 22212 includes two vertical planes arranged in parallel to form a guide groove that guides the axial movement of the valve core. When the valve core is conveyed, the valve core that falls from the feeding assembly 21 into the conveying assembly 22 is first guided into the second guide portion 22212 by the first guide portion 22211, and then falls on the belt conveyor 221. The operation of the belt drives the valve core to move toward the discharge end. According to the time it takes for the feeding assembly 21 to convey a valve core, the conveying speed of the belt conveyor 221 is adjusted to ensure that the valve cores are conveyed into the grinding machine one by one.

[0053] In one embodiment, if Figure 9-14As shown, the discharge assembly 33 includes a first cylinder 331, a second cylinder 332, a first stopper 333 and a pressure block 334. An opening is set on the guide tube 32, and the pressure block 334 is set above the opening. The first cylinder 331 is installed above the guide tube 32 through a fixing frame, and the pressure block 334 is connected to the first cylinder 331. The pressure block 334 is controlled by the first cylinder 331 to pass through the opening on the guide tube 32 to temporarily fix the valve core in a pressing manner; the first stopper 333 is set at the discharge end of the guide tube 32, and the first stopper 333 is connected to the second cylinder 332. The first stopper 333 is controlled by the second cylinder 332 to move up and down, thereby controlling the opening and closing of the discharge end of the guide tube 32. Specifically, the distance between the pressing block 334 and the first stopper 333 is greater than the length of one valve core and less than the length of two valve cores; when in use, the outlet end of the material guide pipe is closed by the first stopper 333, the valve cores are arranged in sequence, the valve core arranged in the second position is pressed and fixed by the pressing block 334, and then the first stopper 333 is controlled to open by the second cylinder 332, and a valve core slides out along the material guide pipe 32 into the diameter measuring assembly 34. Then the material outlet end of the material guide pipe 32 is closed again by the first stopper 333, and the above actions are repeated to realize the discharge of the valve cores one by one.

[0054] In the above embodiment, if Figure 9-14 As shown, the material discharge assembly 33 also includes two groups of proximity switches 335, which are respectively installed on one side of the pressing block 334 close to the feeding end of the material guide tube 32 and between the pressing block 334 and the first stopper 333; and an opening is set at the corresponding position of the material guide tube 32, and the proximity switch 335 is used to detect whether there is a valve core in the material guide tube 32. Specifically, the proximity switch 335 located between the pressing block 334 and the first stopper 333 is used to detect the valve core arranged in the first position to determine whether the valve core is discharged; if the proximity switch does not detect the valve core, the material discharge procedure of the next valve core is entered; if the proximity switch can detect the valve core, the valve core is waited for to be discharged. The proximity switch 335 located on the pressing block 334 close to the material guide tube 32 is used to detect whether there is a valve core in the material guide tube 32. If the proximity switch detects the valve core, it indicates that the pressing block 334 can perform a pressing action to press and fix the valve core arranged in the second position.

[0055] In one embodiment, if Figure 9-14 As shown, an anti-jamming component 36 is also included, and the anti-jamming component 36 is used to knock the guide tube 32. Because grinding fluid is used during grinding, it is inevitable that some grinding fluid will remain after the processing is completed, and the presence of this fluid may cause the valve core to be unable to smoothly pass through the guide tube 32. Through the setting of the anti-jamming component 36, the guide tube 32 is continuously knocked, which can promote the passage of the valve core.

[0056] In the above embodiment, if Figure 9-14As shown, the anti-jamming assembly 36 includes a hammer head 361 and a third cylinder 362 . The third cylinder 362 is used to control the hammer head 361 to move back and forth so as to strike the outer wall of the material guiding tube 32 .

[0057] In one embodiment, if Figure 9-14 As shown, the diameter measuring assembly 34 includes a measuring tube 341, a sensor 342, a second stopper 343 and a fourth cylinder 344. The measuring tube 341 is arranged at the extension of the guide tube 32. An opening is arranged on the side of the measuring tube 341. The diameter of the valve core is measured through the opening by the sensor 342. The second stopper 343 is arranged at the outlet end of the measuring tube 341. The fourth cylinder 344 is connected to the second stopper 343. The fourth cylinder 344 drives the second stopper 343 to control the opening and closing of the measuring tube. When in use, the valve core is supported by the second stopper 343, and the sensor 342 detects the size of the valve core. After the detection is completed, the fourth cylinder 344 is controlled to control the second stopper to open, and the valve core enters the material distribution assembly 35 to control the movement of the material distribution assembly 35 according to the detection result.

[0058] In one embodiment, if Figure 9-14 As shown, the material distribution assembly 35 includes two material distribution pipes 351, a temporary storage pipe 352, a third stopper 353, a fifth cylinder 354 and a sixth cylinder 355. The fifth cylinder 354 is fixed on the second bracket, and the temporary storage pipe 352 is installed on the fifth cylinder 354. The initial position of the temporary storage pipe 352 is located at the extension of the discharge port of the diameter measurement assembly 34. The temporary storage pipe 352 is controlled by the fifth cylinder 354 to move horizontally to switch between the two material distribution pipes 351, and the two material distribution pipes 351 are respectively connected to the qualified material storage box and the unqualified material storage box; an opening is set on the temporary storage pipe 352, and the third stopper 353 is controlled by the sixth cylinder 355 to control the temporary storage pipe 352 to open and close. Preferably, when the temporary storage tube 352 is in the initial position, the discharge end of the temporary storage tube 352 is connected to the distribution tube 351 that guides the material into the qualified material storage box; when the measured size is within the qualified range, the sixth cylinder 355 controls the third stopper 353 to open the temporary storage tube 352. If the test result is unqualified, the temporary storage tube 352 is driven by the fifth cylinder 354 to move horizontally to another distribution tube 351, so that it is connected to the unqualified material storage box, and the third stopper 353 is opened after it is in place, and the unqualified valve core falls into the unqualified material storage box through the distribution tube 351.

[0059] When the present invention is used, Figure 1-Figure 14As shown, the valve core is put into the hopper 212, and the first feeding plate 213 is controlled to move upward by the first driving member 215. At this time, the valve core is temporarily stored on the lifting portion 2131. When it reaches the first guide groove 2141, a valve core falls into the first guide groove 2141. The second driving member 216 controls the second feeding plate 214 to move upward, so that the first guide groove 2141 is separated from the side plate 2121. The valve core will slide out with the first guide groove 2141 and fall into the conveying assembly 22. The valve core is sent to the grinding mill through the belt conveyor 221. The grinding device 1 is used for grinding. After the grinding is completed, the valve core is sent to the guide pipe 32. The valve cores are released one by one through the material discharge assembly 33. The valve cores that fall into the diameter measurement assembly 34 are measured by the sensor 42. After the measurement is completed, the valve core falls into the temporary storage pipe 352 of the material distribution assembly 35. According to the measurement result, the temporary storage pipe 352 is controlled by the fifth cylinder 354 to connect to the qualified or unqualified material distribution pipe 351. After it is in place, the third stopper 353 is controlled to be opened by the sixth cylinder 355, thereby realizing the classified storage of the valve core. In this process, the third cylinder 363 continuously hammers the outer wall of the guide pipe 32 through the hammer head 361 to promote the movement of the valve core in the guide pipe 32.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should all be included in the protection scope of the claims of the present invention.

Claims

1. A valve core grinding machine, characterized in that: include: Grinding equipment to grind the outer surface of the valve core; A feeding mechanism for conveying the valve cores one by one into the grinding device; The unloading mechanism detects the diameter of the valve core after grinding and stores it according to the test results; The feeding mechanism comprises a feeding assembly and a conveying assembly, the feeding assembly is used to feed the valve cores into the conveying assembly one by one, and the conveying assembly is used to feed the valve cores into the grinding machine equipment; The material discharge mechanism comprises a second bracket, a material guide pipe, a material discharge assembly, a diameter measuring assembly and a material separation assembly. The material guide pipe is tiltedly arranged on the second bracket. The material feed end of the material guide pipe is connected to the grinding device, and the material discharge end is sequentially connected to the diameter measuring assembly and the material separation assembly. The material discharge assembly is arranged on the material guide pipe, and the material discharge assembly is used to discharge the material one by one; the diameter measuring assembly is used to measure the diameter of the valve core; and the material separation assembly is used to classify and guide the valve core into qualified and unqualified valve cores; The material distribution assembly includes two material distribution pipes, a temporary storage pipe, a third stopper, a fifth cylinder and a sixth cylinder. The fifth cylinder is fixed on the second bracket, the temporary storage pipe is installed on the fifth cylinder, and the initial position of the temporary storage pipe is located at the extension of the discharge port of the diameter measuring assembly; the temporary storage pipe is controlled by the fifth cylinder to move horizontally to switch between the two material distribution pipes, and the two material distribution pipes are respectively connected to a qualified material storage box and an unqualified material storage box; an opening is set on the temporary storage pipe, and the third stopper is controlled by the sixth cylinder to control the temporary storage pipe to open and close; The feeding assembly includes a first bracket, a hopper, a first feeding plate, a second feeding plate, a first driving member and a second driving member. A lifting portion is provided at the upper end of the first feeding plate, and the valve core is lifted and moved upward by the lifting portion. A first material guide groove allowing a single valve core to pass through is provided on the second feeding plate. The valve core is fed into the first material guide groove by the first feeding plate, and the second driving member is used to drive the second feeding plate to move upward, so as to drive the valve core to move to a side plate higher than the hopper, so that the valve cores fall into the conveying assembly one by one.

2. A valve core grinding machine according to claim 1, characterized in that: The hopper is used to hold the valve core, the first feed plate is stacked on the second feed plate, the second feed plate is stacked on the inner wall of one of the side plates of the hopper, and the inner wall of the side plate is an inclined surface, and the first driving member and the second driving member are respectively used to control the first feed plate and the second feed plate to move back and forth up and down along the side plate.

3. A valve core grinding machine according to claim 2, characterized in that: A guide hole is provided at the bottom of the hopper, and a stirring rod is slidably provided in the guide hole. The stirring rod is connected to the first driving member, and the first driving member is used to drive the stirring rod and the first feeding plate to move up and down synchronously; at least one stirring rod is provided.

4. A valve core grinding machine according to claim 2, characterized in that: The lifting portion is an inclined surface inclined toward the second feeding plate.

5. A valve core grinding machine according to claim 2, characterized in that: The thickness of the first material guiding groove is only sufficient to stack one valve core.

6. A valve core grinding machine according to claim 2, characterized in that: The conveying assembly includes a belt conveyor and a material guide plate, wherein the material guide plate is installed on the belt conveyor and a second material guide groove converging toward the middle is provided on the material guide plate; the second material guide groove is used to guide the valve core to fall onto the belt conveyor and move along the length direction of the second material guide groove.

7. A valve core grinding machine according to claim 1, characterized in that: The discharge assembly includes a first cylinder, a second cylinder, a first stopper and a pressure block. An opening is arranged on the material guide tube, and the pressure block is arranged above the opening. The first cylinder is used to drive the pressure block to move along the circumference of the material guide tube, and the pressure block is used to press the valve core into the material guide tube; the first stopper is arranged at the discharge end of the material guide tube, and the first stopper is connected to the second cylinder. The second cylinder is used to control the first stopper to control the opening and closing of the discharge end of the material guide tube.

8. A valve core grinding machine according to claim 7, characterized in that: The discharge assembly also includes two groups of proximity switches, which are respectively installed on one side of the pressing block close to the feed end of the material guide pipe and between the pressing block and the first stopper; and openings are set at corresponding positions of the material guide pipe, and the proximity switches are used to detect whether there is a valve core in the material guide pipe.

9. The valve core grinding machine according to claim 1, characterized in that: It also includes an anti-jamming component, which includes a hammer head and a third cylinder. The third cylinder is used to control the hammer head to move back and forth to knock the outer wall of the guide tube.

10. The valve core grinding machine according to claim 1, characterized in that: The diameter measuring assembly includes a measuring tube, a sensor, a second stopper and a fourth cylinder. The measuring tube is arranged at the extension of the material guide tube. An opening is arranged on the side of the measuring tube. The sensor is used to measure the diameter of the valve core through the opening. The second stopper is arranged at the outlet end of the measuring tube. The fourth cylinder is connected to the second stopper. The fourth cylinder is used to drive the second stopper to control the opening and closing of the measuring tube.

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