A plunger core and a machining apparatus

Abstract

A plunger core and processing equipment. The application discloses a fuel injection pump plunger core, relates to the technical field of fuel injection pump plunger core, and comprises a long section, wherein the plunger core top is provided with an oil storage structure; the fuel injection pump plunger core reciprocates in a fuel injection pump plunger sleeve; fuel in the oil storage structure is compensated automatically and timely by virtue of extrusion inertia of reciprocation, the supply of fuel is increased, the change of diesel engine operation is reduced, and fast stable operation conditions are achieved. The application discloses a processing equipment for the plunger core, which comprises an equipment shell, a feeding mechanism for feeding the plunger core and a polishing mechanism for polishing the plunger core are arranged in the equipment shell. Under the driving of the lifting electric cylinder, each polishing roller can be precisely attached to the long section, the concave section, the convex section and the end section of the plunger core. All the external circles of the rotary bodies of the plunger core can be polished at one time, the plunger core is rotated through friction during polishing, and continuous and synchronous polishing of the multi-section special-shaped external circles is realized in one clamping.

Description

Technical Field

[0001] This invention relates to the field of plunger core technology, and particularly to a plunger core and processing equipment. Background Technology

[0002] The plunger core is a core component in hydraulic pumps, fuel injection pumps, and various precision plunger assemblies, widely used in automotive engines, hydraulic systems of construction machinery, and high-pressure fluid control equipment. During operation, the plunger core must withstand high-frequency reciprocating motion and high-pressure fluid impact; its dimensional accuracy, surface roughness, and geometric tolerances directly affect the overall sealing performance, wear resistance, and service life of the machine. A typical plunger core includes multiple structural sections such as a long section, a concave section, a middle section (with both flat and curved surfaces), a convex section, and an end section. Each section has different cross-sectional shapes and radial dimensions, forming a stepped shaft shape with non-rotating characteristics, making it a typical complex shaft component.

[0003] Currently, the machining of plunger cores typically employs a combination of general-purpose CNC lathes, cylindrical grinding machines, and manual polishing. Due to the multi-segmented variable-diameter structure and non-circular planar features of the plunger core, the machining process requires multiple clamping and segmented grinding operations. Frequent changes in clamping and positioning references make it difficult to guarantee coaxiality and dimensional consistency between segments. Particularly problematic is the coexistence of planar and curved surfaces in the middle segment. Existing grinding wheel or belt polishing processes often rely on manual hand-held workpiece adjustment of angles for step-by-step grinding. Operators must rely on experience to judge the transition position between the planar and curved surfaces and apply different grinding pressures and feed directions accordingly. This not only results in low machining efficiency but also significant surface roughness fluctuations and obvious joint marks between the planar and curved surfaces, failing to meet the increasingly stringent precision and consistency requirements of high-end equipment for plunger cores.

[0004] Regarding automated machining equipment, existing plunger core grinding equipment is mostly a single-station or multi-station discrete structure, with each process—feeding, positioning, grinding, and unloading—operating independently, requiring manual intervention for loading / unloading and station switching. While some equipment is equipped with vibratory feeders or conveyor belts for automatic feeding, it is difficult to achieve automatic orientation and uniform placement during the feeding process for asymmetric plunger cores with planar and curved surface features. This often results in the plunger core deflecting or jamming during transport, leading to inconsistent positioning references in subsequent grinding processes and affecting processing quality. Furthermore, existing grinding mechanisms typically only perform continuous grinding on the outer diameter of the rotating part of the plunger core. For planar features in the middle section, the machine must be stopped and the workpiece angle readjusted or the grinding tools changed. It is impossible to complete continuous processing of rotating and non-rotating surfaces in a single setup, resulting in long auxiliary times and low automation. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention discloses a processing device capable of automatically feeding and uniformly orienting plunger cores, and continuously grinding the outer circumference and the plane and arc surfaces of each segment of the plunger core. The technical solution adopted by this invention is as follows: a plunger core includes a long segment, a concave segment fixedly installed on the long segment, a middle segment fixedly installed on the concave segment, a plane and an arc surface provided on the middle segment, a convex segment fixedly installed on the middle segment, and an end segment fixedly installed on the convex segment.

[0006] The plunger core has an oil storage structure at the top. The fuel injection pump plunger core reciprocates within the fuel injection pump plunger sleeve. The reciprocating inertia automatically and timely replenishes the fuel in the oil storage structure, increasing the fuel supply and reducing changes in diesel engine operation, thus achieving stable operating conditions.

[0007] A plunger core processing device includes a device housing with an insertion plate on the housing. The device housing is characterized by having a feeding mechanism for feeding the plunger core and a grinding mechanism for grinding the plunger core inside the housing. The feeding mechanism includes a feeding box.

[0008] Furthermore, the feeding mechanism also includes push-out electric cylinders fixedly installed on both sides of the feeding box. An outer push plate is fixedly installed on the output end of the push-out electric cylinder, and multiple push columns are fixedly installed on the outer push plate. An inner push sleeve is fixedly installed at the end of the push column.

[0009] Furthermore, the feeding mechanism also includes two inner drive rollers rotatably installed inside the feeding box. A rotating motor is fixedly installed on the feeding box. The motor shaft of the rotating motor is fixedly installed with one of the inner drive rollers. An outer gear is fixedly installed at the end of the inner drive roller. A material dropping belt is wound around the two inner drive rollers. Multiple dropping grooves are equidistantly arranged on the material dropping belt. The dropping grooves are consistent with the shape of the plunger core.

[0010] Furthermore, the feeding mechanism also includes a baffle plate slidably mounted on the feeding box. The baffle plate is located between the feeding box and the grinding mechanism. A blocking electric cylinder is provided below the feeding box. The output end of the blocking electric cylinder is fixedly mounted to the baffle plate. Multiple through grooves are provided at the upper end of the baffle plate.

[0011] Furthermore, the feeding mechanism also includes multiple lower positioning supports fixedly installed inside the feeding box. A lifting column is slidably installed inside the lower positioning support, a positioning plate is fixedly installed on the lifting column, a lower plate is fixedly installed below the lifting column, and a support spring is provided between the lower plate and the lower positioning support.

[0012] During use, the infeed plate is opened, and the plunger core to be ground is placed into the feed box. The plunger core then falls onto the inner drive roller, and through the drop groove on the inner drive roller, it falls onto the lower positioning support. The two ends of the plunger core are limited by the blocking plate and the feed box. Then, the motor drives the inner drive roller and the outer gear to rotate. The inner drive roller drives the dropping belt to rotate once. For plunger cores whose middle arc surface contacts the positioning plate, the dropping belt will push the middle section to rotate, so that the flat surface of the middle section of all plunger cores contacts the upper surface of the positioning plate. The support spring dampens the falling plunger cores, at which point all the plunger cores are located in the lower positioning support, and the plane of the middle section contacts the upper surface of the positioning plate. Then, the blocking electric cylinder retracts, driving the blocking plate to descend, allowing the plunger cores to reach the front of the end section through the groove. Then, the push-out electric cylinder retracts, driving the outer push plate, push column, and inner push sleeve to move inward. The inner push sleeve pushes all the plunger cores in the lower positioning support onto each core-dispensing support. Then, the blocking electric cylinder extends, driving the blocking plate to rise, allowing the blocking plate to return to its initial position, at which point the next feeding can begin.

[0013] Furthermore, the grinding mechanism includes an upper electric cylinder frame fixedly mounted on the feed box, multiple lifting electric cylinders fixedly mounted on the upper electric cylinder frame, a grinding bracket fixedly mounted on the output end of the lifting electric cylinders, the grinding bracket being slidably mounted with the feed box, a long grinding roller being rotatably mounted on the grinding bracket, a convex grinding roller being fixedly mounted on the long grinding roller, a concave grinding roller being fixedly mounted on the convex grinding roller, an end grinding roller being fixedly mounted on the concave grinding roller, an end post being fixedly mounted on the end grinding roller, the end post being rotatably mounted with the grinding bracket, a blocking block being fixedly mounted below the grinding bracket, a grinding motor being fixedly mounted on the grinding bracket, a motor wheel being fixedly mounted on the motor shaft of the grinding motor, and the motor wheel driving the long grinding roller to rotate via a vertical transmission belt.

[0014] Furthermore, the grinding mechanism also includes a lower bracket fixedly installed on the feed box, on which multiple core supports are rotatably installed. In the initial state, the concave surface of the core support faces upward, and an end gear is fixedly installed at the end of the core support. A transmission belt is wound around the outer gear and multiple end gears.

[0015] Furthermore, the polishing mechanism also includes a clamping electric cylinder fixedly installed on the polishing bracket. A clamping frame is fixedly installed on the output end of the clamping electric cylinder. A fixed column is fixedly installed below the polishing bracket. The clamping frame slides along the fixed column. A lower motor is fixedly installed on the clamping frame. A friction wheel is fixedly installed on the output end of the lower motor. An inner support frame is fixedly installed on the clamping frame. Multiple inner transmission wheels are rotatably installed on the inner support frame. A polishing belt is wound around the inner transmission wheels. The polishing belt and the friction wheel form a friction transmission.

[0016] After the plunger core is fully pushed onto the core support, the lifting cylinder extends, causing the grinding bracket to descend. This allows the blocking block to reach the rear end of the plunger core, limiting its position. At this point, the end plunger enters the notch in the lower bracket. The long grinding roller is positioned above and in contact with the long section, the convex grinding roller is positioned above and in contact with the concave section, the concave grinding roller is positioned above and in contact with the convex section, and the end grinding roller is positioned above and in contact with the end section. The grinding motor drives the motor wheel to rotate, which in turn drives the long grinding roller, convex grinding roller, concave grinding roller, and end grinding roller to rotate via the vertical transmission belt. The lower motor drives the friction wheel to rotate, which in turn drives the grinding belt to rotate around the inner transmission wheel. The long grinding roller, convex grinding roller, concave grinding roller, and end grinding roller then rotate... Do not grind the long section, concave section, convex section, or end section. Simultaneously, the long grinding roller, convex grinding roller, concave grinding roller, and end grinding roller will drive the plunger core to rotate. When the plunger core rotates, the arc surface of the middle section will contact the lower surface of the grinding belt. The arc surface of the middle section is ground by the rotation of the grinding belt. After the arc surfaces of the long section, concave section, convex section, end section, and middle section are ground, adjust the middle section to a position with the flat surface facing upwards. At this time, the clamping electric cylinder extends, driving the clamping frame to descend along the fixed column, so that the lower surface of the grinding belt contacts the flat surface of the middle section. The grinding belt rotates to grind the flat part of the middle section. Similarly, rotate the other flat surface of the plunger core to an upward-facing position, and grind the other flat part of the middle section by the rotating grinding belt.

[0017] Once all the plunger cores have been ground, the lifting electric cylinder retracts, causing the grinding bracket to rise. At this point, as the inner drive roller aligns the next batch of plunger cores to be processed, the inner drive roller drives the outer gear to rotate. The outer gear, through the drive belt, drives all the end gears and the core-dispensing support to rotate 180 degrees, and the core-dispensing support pours out the processed plunger cores.

[0018] The beneficial effects of this invention compared with the prior art are: (1) By setting up a feeding mechanism, this invention uses the drop groove on the drop belt that is consistent with the shape of the plunger core for preliminary screening, and combined with the limiting effect of the lower positioning support, positioning plate and blocking plate, and the intermittent rotation of the drop belt to drive the middle section to rotate, it can automatically adjust the plunger core to a uniform posture in which the middle section plane contacts the positioning plate, replacing the manual straightening operation, ensuring that the positioning reference of each plunger core is consistent during subsequent processing, and improving the posture uniformity and size consistency of batch processing; (2) By setting up a combined grinding bracket with long grinding roller, convex grinding roller, concave grinding roller and end grinding roller, this invention, under the drive of the lifting electric cylinder, each grinding roller can be used to grind the plunger core. The grinding roller can precisely fit with the long section, concave section, convex section and end section of the plunger core respectively. It can grind all the rotating outer circles of the plunger core at the same time in one drop. During the grinding process, the plunger core is driven to rotate by friction. The grinding belt is used to process the arc surface of the middle section, realizing the continuous synchronous grinding of multiple irregular outer circles in one clamping. (3) By setting up a clamping electric cylinder, a clamping frame and a lifting grinding belt mechanism, after the rotating surface and arc surface of the plunger core are ground, there is no need to re-clamp or manually adjust the angle. The clamping electric cylinder can directly drive the grinding belt to descend to contact the plane of the middle section and perform special grinding on the plane part, ensuring the smoothness of the transition between the plane and the arc surface and the surface roughness. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the plunger core of the present invention.

[0020] Figure 2 This is a schematic diagram of the plunger core processing equipment of the present invention.

[0021] Figure 3 This is a schematic diagram (internal) of the plunger core processing equipment of the present invention.

[0022] Figure 4 This is a schematic diagram of the feeding mechanism of the present invention. Figure 1 .

[0023] Figure 5 This is a schematic diagram of the feeding mechanism of the present invention. Figure 2 .

[0024] Figure 6 This is a schematic diagram of the feeding mechanism of the present invention. Figure 3 .

[0025] Figure 7 This is a schematic diagram of the feeding mechanism of the present invention. Figure 4 .

[0026] Figure 8 This is a schematic diagram of the grinding mechanism of the present invention. Figure 1 .

[0027] Figure 9 This is a schematic diagram of the grinding mechanism of the present invention. Figure 2 .

[0028] Figure 10 This is a schematic diagram of the grinding mechanism of the present invention. Figure 3 .

[0029] Reference numerals: 101-Feed box; 102-Ejection electric cylinder; 103-Outer push plate; 104-Push column; 105-Inner push sleeve; 106-Rotating motor; 107-Inner transmission roller; 108-Outer gear; 109-Discharge belt; 110-Drop chute; 111-Blocking electric cylinder; 112-Blocking plate; 113-Passing groove; 114-Lower positioning support; 115-Lifting column; 116-Positioning plate; 117-Lower plate; 118-Supporting spring; 201-Upper electric cylinder frame; 202-Lifting electric cylinder; 203-Grinding bracket; 204-Grinding motor; 205-Motor wheel; 206-Vertical transmission 207-Long grinding roller; 208-Convex grinding roller; 209-Concave grinding roller; 210-End grinding roller; 211-Lower support; 212-Core support; 213-Blocking block; 214-End gear; 215-Drive belt; 216-Fitting cylinder; 217-Fitting frame; 218-Fixing column; 219-Lower motor; 220-Friction wheel; 221-Inner support frame; 222-Inner drive wheel; 223-Grinding belt; 224-End column; 3-Equipment housing; 401-Long section; 402-Concave section; 403-Middle section; 404-Convex section; 405-End section; 5-Insertion plate. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example: Reference Figures 1-10 A plunger core includes a long section 401, a concave section 402 fixedly installed on the long section 401, a middle section 403 fixedly installed on the concave section 402, the middle section 403 having a flat surface and an arc surface, a convex section 404 fixedly installed on the middle section 403, and an end section 405 fixedly installed on the convex section 404.

[0032] like Figures 2-10 As shown, a plunger core processing device includes a device housing 3, on which an insertion plate 5 is provided. The device housing 3 is characterized in that a feeding mechanism for feeding the plunger core and a grinding mechanism for grinding the plunger core are provided inside the device housing 3. The feeding mechanism includes a feeding box 101.

[0033] like Figures 3-7As shown, the feeding mechanism also includes push-out electric cylinders 102 fixedly installed on both sides of the feeding box 101. An outer push plate 103 is fixedly installed on the output end of the push-out electric cylinder 102. A plurality of push columns 104 are fixedly installed on the outer push plate 103. An inner push sleeve 105 is fixedly installed at the end of the push column 104.

[0034] like Figures 3-7 As shown, the feeding mechanism also includes two inner drive rollers 107 rotatably installed inside the feeding box 101. A rotary motor 106 is fixedly installed on the feeding box 101. The motor shaft of the rotary motor 106 is fixedly installed with one of the inner drive rollers 107. An outer gear 108 is fixedly installed at the end of the inner drive roller 107. A discharge belt 109 is wound around the two inner drive rollers 107. A plurality of drop grooves 110 are equidistantly arranged on the discharge belt 109. The drop grooves 110 are consistent with the shape of the plunger core.

[0035] like Figures 3-7 As shown, the feeding mechanism also includes a baffle plate 112 that is slidably mounted on the feeding box 101. The baffle plate 112 is located between the feeding box 101 and the grinding mechanism. A blocking electric cylinder 111 is provided below the feeding box 101. The output end of the blocking electric cylinder 111 is fixedly mounted to the baffle plate 112. A plurality of through grooves 113 are provided on the upper end of the baffle plate 112.

[0036] like Figures 3-7 As shown, the feeding mechanism also includes multiple lower positioning supports 114 fixedly installed in the feeding box 101. A lifting column 115 is slidably installed in the lower positioning support 114. A positioning plate 116 is fixedly installed on the lifting column 115. A lower plate 117 is fixedly installed below the lifting column 115. A support spring 118 is provided between the lower plate 117 and the lower positioning support 114.

[0037] When in use, open the placement plate 5 and place the plunger core to be ground into the feed box 101. The plunger core then falls onto the inner drive roller 107 and drops through the drop groove 110 on the inner drive roller 107 onto the lower positioning support 114. The two ends of the plunger core are limited by the blocking plate 112 and the feed box 101. Then, the rotating motor 106 drives the inner drive roller 107 and the outer gear 108 to rotate. The inner drive roller 107 drives the dropping belt 109 to rotate once. For the plunger core whose arc surface of the middle section 403 is in contact with the positioning plate 116, the dropping belt 109 will push the middle section 403 to rotate, so that the plane of the middle section 403 of all the plunger cores is in contact with the upper surface of the positioning plate 116. The falling plunger cores are damped by the support spring 118. At this time, all the plunger cores are located in the lower positioning support 114, and the plane of the middle section 403 is in contact with the upper surface of the positioning plate 116. Then, the blocking electric cylinder 111 retracts, driving the blocking plate 112 to descend, so that it reaches the front of the end section 405 through the groove 113. Then, the push-out electric cylinder 102 retracts, driving the outer push plate 103, push column 104 and inner push sleeve 105 to move inward. The inner push sleeve 105 pushes all the plunger cores in the lower positioning support 114 onto each core release support 212. Then, the blocking electric cylinder 111 extends, driving the blocking plate 112 to rise, so that the blocking plate 112 returns to the initial position, and the next feeding can be carried out.

[0038] like Figures 8-10 As shown, the grinding mechanism includes an upper electric cylinder frame 201 fixedly mounted on the feed box 101. Multiple lifting electric cylinders 202 are fixedly mounted on the upper electric cylinder frame 201. A grinding bracket 203 is fixedly mounted on the output end of each lifting electric cylinder 202. The grinding bracket 203 is slidably mounted to the feed box 101. A long grinding roller 207 is rotatably mounted on the grinding bracket 203. A convex grinding roller 208 is fixedly mounted on the long grinding roller 207, and a concave grinding roller is fixedly mounted on the convex grinding roller 208. 209. An end grinding roller 210 is fixedly installed on the concave grinding roller 209. An end post 224 is fixedly installed on the end grinding roller 210. The end post 224 is rotatably installed with the grinding bracket 203. A blocking block 213 is fixedly installed below the grinding bracket 203. A grinding motor 204 is fixedly installed on the grinding bracket 203. A motor wheel 205 is fixedly installed on the motor shaft of the grinding motor 204. The motor wheel 205 drives the long grinding roller 207 to rotate through the vertical transmission belt 206.

[0039] like Figures 8-10 As shown, the grinding mechanism also includes a lower bracket 211 fixedly installed on the feed box 101. Multiple core supports 212 are rotatably installed on the lower bracket 211. In the initial state, the concave surface of the core support 212 faces upward. An end gear 214 is fixedly installed at the end of the core support 212. A transmission belt 215 is wound around the outer gear 108 and the multiple end gears 214.

[0040] like Figures 8-10 As shown, the grinding mechanism also includes a clamping electric cylinder 216 fixedly installed on the grinding bracket 203. A clamping frame 217 is fixedly installed on the output end of the clamping electric cylinder 216. A fixed column 218 is fixedly installed below the grinding bracket 203. The clamping frame 217 slides along the fixed column 218. A lower motor 219 is fixedly installed on the clamping frame 217. A friction wheel 220 is fixedly installed on the output end of the lower motor 219. An inner support frame 221 is fixedly installed on the clamping frame 217. Multiple inner transmission wheels 222 are rotatably installed on the inner support frame 221. A grinding belt 223 is wound around the inner transmission wheels 222. The grinding belt 223 and the friction wheel 220 form a friction transmission.

[0041] After the plunger core is fully pushed onto the core support 212, the lifting cylinder 202 extends, causing the grinding bracket 203 to descend, so that the blocking block 213 reaches the rear end of the plunger core, limiting the end of the plunger core. At this time, the end pin 224 enters the notch of the lower bracket 211. The long grinding roller 207 is located above and in contact with the long section 401, the convex grinding roller 208 is located above and in contact with the concave section 402, and the concave grinding roller 209 is located above and in contact with the convex section 404. 4. With the end grinding roller 210 positioned above and in contact with the end section 405, the grinding motor 204 drives the motor wheel 205 to rotate. The motor wheel 205 drives the long grinding roller 207, convex grinding roller 208, concave grinding roller 209, and end grinding roller 210 to rotate via the vertical transmission belt 206. The lower motor 219 drives the friction wheel 220 to rotate, which in turn drives the grinding belt 223 to rotate around the inner transmission wheel 222. The long grinding roller 207, convex grinding roller 208, and concave grinding roller... Grinding rollers 209 and 210 grind the long section 401, concave section 402, convex section 404, and end section 405 respectively. Simultaneously, grinding rollers 207, convex roller 208, concave roller 209, and end roller 210 drive the plunger core to rotate. When the plunger core rotates, the arc surface of the middle section 403 contacts the lower surface of the grinding belt 223. The rotation of the grinding belt 223 grinds the arc surface of the middle section 403. When the long section 401, concave section 402, convex section 404, and end section 405 rotate, the grinding belt 223 grinds the arc surface of the middle section 403. After the arc surface of section 5 and the middle section 403 is polished, the middle section 403 is adjusted to a position with the flat surface facing upwards. At this time, the electric cylinder 216 extends, driving the clamping frame 217 to descend along the fixed column 218, so that the lower surface of the polishing belt 223 contacts the flat surface of the middle section 403. The polishing belt 223 rotates to polish the flat part of the middle section 403. Similarly, the other flat surface of the plunger core is rotated to an upward position, and the other flat part of the middle section 403 is polished by the rotating polishing belt 223.

[0042] After all the plunger cores have been ground, the lifting electric cylinder 202 retracts, causing the grinding bracket 203 to rise. At this time, while the inner transmission roller 107 is aligning the next batch of plunger cores to be processed, the inner transmission roller 107 drives the outer gear 108 to rotate. The outer gear 108 drives all the end gears 214 and the core release support 212 to rotate 180 degrees through the transmission belt 215. The core release support 212 then pours out the processed plunger cores.

[0043] Working principle: When in use, open the infeed plate 5 and place the plunger core to be ground into the feed box 101. The plunger core then falls onto the inner drive roller 107 and through the drop groove 110 on the inner drive roller 107 onto the lower positioning support 114. The blocking plate 112 and the feed box 101 limit the movement of both ends of the plunger core. Then, the rotating motor 106 drives the inner drive roller 107 and the outer gear 108 to rotate. The inner drive roller 107 drives the discharge belt 109 to rotate once. For plunger cores whose arc surface of the middle section 403 contacts the positioning plate 116, the discharge belt 109 will push the middle section 403 to rotate, so that the plane of the middle section 403 of all plunger cores contacts the upper surface of the positioning plate 116. When the piston core is touched, the support spring 118 dampens the falling piston core. At this time, all the piston cores are located in the lower positioning support 114, and the plane of the middle section 403 is in contact with the upper surface of the positioning plate 116. Then, the blocking electric cylinder 111 retracts, driving the blocking plate 112 to descend, so that it reaches the front of the end section 405 through the groove 113. Then, the push-out electric cylinder 102 retracts, driving the outer push plate 103, push column 104 and inner push sleeve 105 to move inward. The inner push sleeve 105 pushes all the piston cores in the lower positioning support 114 onto each core release support 212. Then, the blocking electric cylinder 111 extends, driving the blocking plate 112 to rise, so that the blocking plate 112 returns to the initial position, and the next feeding can be carried out.

[0044] After the plunger core is fully pushed onto the core support 212, the lifting cylinder 202 extends, causing the grinding bracket 203 to descend, so that the blocking block 213 reaches the rear end of the plunger core, limiting the end of the plunger core. At this time, the end pin 224 enters the notch of the lower bracket 211. The long grinding roller 207 is located above and in contact with the long section 401, the convex grinding roller 208 is located above and in contact with the concave section 402, and the concave grinding roller 209 is located above and in contact with the convex section 404. 4. With the end grinding roller 210 positioned above and in contact with the end section 405, the grinding motor 204 drives the motor wheel 205 to rotate. The motor wheel 205 drives the long grinding roller 207, convex grinding roller 208, concave grinding roller 209, and end grinding roller 210 to rotate via the vertical transmission belt 206. The lower motor 219 drives the friction wheel 220 to rotate, which in turn drives the grinding belt 223 to rotate around the inner transmission wheel 222. The long grinding roller 207, convex grinding roller 208, and concave grinding roller... Grinding rollers 209 and 210 grind the long section 401, concave section 402, convex section 404, and end section 405 respectively. Simultaneously, grinding rollers 207, convex roller 208, concave roller 209, and end roller 210 drive the plunger core to rotate. When the plunger core rotates, the arc surface of the middle section 403 contacts the lower surface of the grinding belt 223. The rotation of the grinding belt 223 grinds the arc surface of the middle section 403. When the long section 401, concave section 402, convex section 404, and end section 405 rotate, the grinding belt 223 grinds the arc surface of the middle section 403. After the arc surface of section 5 and the middle section 403 is polished, the middle section 403 is adjusted to a position with the flat surface facing upwards. At this time, the clamping electric cylinder 216 extends, driving the clamping frame 217 to descend along the fixed column 218, so that the lower surface of the polishing belt 223 contacts the flat surface of the middle section 403. The polishing belt 223 rotates to polish the flat part of the middle section 403. Similarly, the other flat surface of the plunger core is rotated to an upward position, and the other flat part of the middle section 403 is polished by the rotating polishing belt 223. When all the plunger cores are polished, the lifting electric cylinder 202 retracts, driving the polishing bracket 203 to rise. At this time, when the inner drive roller 107 aligns the next batch of plunger cores to be processed, the inner drive roller 107 drives the outer gear 108 to rotate. The outer gear 108 drives all the end gears 214 and the core release support 212 to rotate 180 degrees through the drive belt 215. The core release support 212 pours out the processed plunger core.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A plunger core, comprising a long section, characterized in that: A concave section is fixedly installed on the long section, a middle section is fixedly installed on the concave section, the middle section has a flat surface and an arc surface, a convex section is fixedly installed on the middle section, and an end section is fixedly installed on the convex section.

2. The processing equipment for a plunger core according to claim 1, characterized in that: The device includes a housing with an insertion plate. The device is characterized in that the housing contains a feeding mechanism for feeding a plunger core and a grinding mechanism for grinding the plunger core. The feeding mechanism includes a feeding box.

3. The plunger core processing equipment according to claim 2, characterized in that: The feeding mechanism also includes push-out electric cylinders fixedly installed on both sides of the feeding box. An outer push plate is fixedly installed on the output end of the push-out electric cylinder, and multiple push columns are fixedly installed on the outer push plate. An inner push sleeve is fixedly installed at the end of the push column.

4. The plunger core processing equipment according to claim 3, characterized in that: The feeding mechanism also includes two inner drive rollers rotatably installed inside the feeding box. A rotating motor is fixedly installed on the feeding box. The motor shaft of the rotating motor is fixedly installed with one of the inner drive rollers. An outer gear is fixedly installed at the end of the inner drive roller. A material dropping belt is wound around the two inner drive rollers. Multiple dropping grooves are equidistantly arranged on the material dropping belt. The dropping grooves are consistent with the shape of the plunger core.

5. The plunger core processing equipment according to claim 4, characterized in that: The feeding mechanism also includes a baffle plate that is slidably installed on the feeding box. The baffle plate is located between the feeding box and the grinding mechanism. A blocking electric cylinder is provided below the feeding box. The output end of the blocking electric cylinder is fixedly installed with the baffle plate. Multiple through grooves are provided at the upper end of the baffle plate.

6. The plunger core processing equipment according to claim 5, characterized in that: The feeding mechanism also includes multiple lower positioning supports fixedly installed inside the feeding box. A lifting column is slidably installed inside the lower positioning support. A positioning plate is fixedly installed on the lifting column. A lower plate is fixedly installed below the lifting column. A support spring is provided between the lower plate and the lower positioning support.

7. The plunger core processing equipment according to claim 4, characterized in that: The grinding mechanism includes an upper electric cylinder frame fixedly mounted on the feed box, multiple lifting electric cylinders fixedly mounted on the upper electric cylinder frame, a grinding bracket fixedly mounted on the output end of the lifting electric cylinders, the grinding bracket being slidably mounted to the feed box, a long grinding roller being rotatably mounted on the grinding bracket, a convex grinding roller being fixedly mounted on the long grinding roller, a concave grinding roller being fixedly mounted on the convex grinding roller, an end grinding roller being fixedly mounted on the concave grinding roller, an end post being fixedly mounted on the end grinding roller, the end post being rotatably mounted to the grinding bracket, a blocking block being fixedly mounted below the grinding bracket, a grinding motor being fixedly mounted on the grinding bracket, a motor wheel being fixedly mounted on the motor shaft of the grinding motor, and the motor wheel driving the long grinding roller to rotate via a vertical transmission belt.

8. The processing equipment for a plunger core according to claim 7, characterized in that: The grinding mechanism also includes a lower bracket fixedly installed on the feed box. Multiple core supports are rotatably installed on the lower bracket. In the initial state, the concave surface of the core support faces upward. An end gear is fixedly installed at the end of the core support, and a transmission belt is wound around the outer gear and multiple end gears.

9. The plunger core processing equipment according to claim 8, characterized in that: The polishing mechanism also includes a clamping electric cylinder fixedly installed on the polishing bracket. A clamping frame is fixedly installed on the output end of the clamping electric cylinder. A fixed column is fixedly installed below the polishing bracket. The clamping frame slides along the fixed column. A lower motor is fixedly installed on the clamping frame. A friction wheel is fixedly installed on the output end of the lower motor. An inner support frame is fixedly installed on the clamping frame. Multiple inner transmission wheels are rotatably installed on the inner support frame. A polishing belt is wound around the inner transmission wheels. The polishing belt and the friction wheel form a friction transmission.

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