A centerless grinding loading device for carbide valve seat

Abstract

The utility model relates to hard alloy valve seat processing technical field especially relates to a kind of hard alloy valve seat centerless grinding feeding device, including feeding mechanism, guide rod etc., and feeding mechanism and feeding mechanism are sequentially arranged from front to back by front side of centerless grinding, and feeding mechanism includes vibrating disk, blanking tube and mounting bracket, mounting bracket is set in front side of centerless grinding, vibrating disk is installed on mounting bracket top, vibrating disk export end faces rear side, and is connected and communicates with blanking tube, guide rod is formed L type structure by round steel bending, its short side is inserted into blanking tube export end, long side extends horizontally and passes through centerless grinding machine platform area, and penetrates V type groove. The utility model is through guide rod penetration feeding, feeding and centerless grinding processing area, and cooperate vibrating disk and linear vibration feeder to realize the automatic threading of valve seat and continuous push, reaches the valve seat from vibrating disk automatically into guide rod through blanking tube, to replace the operation of artificial threading and feeding.

Description

Technical Field

[0001] This utility model relates to the field of cemented carbide valve seat processing technology, and in particular to a cemented carbide valve seat centerless grinding feeding device. Background Technology

[0002] Carbide valve seats are key components commonly used in valves in the petrochemical industry. Due to their excellent wear resistance, corrosion resistance, and high-temperature stability, they are widely used in high-pressure, high-temperature, or highly corrosive media environments. During the manufacturing process of valve seats, their outer ring requires precision grinding using a centerless grinder to achieve the required dimensional accuracy and surface finish.

[0003] The outer ring of the valve seat needs to be machined using a centerless grinder during production. The current feeding method is as follows: The valve seat is annular, typically only 2-4 mm thick, which is thin and 6-15 mm less than its diameter. It cannot be machined upright directly. Currently, operators thread a suitable screw through the ring, lock it with a nut, and then manually place the threaded screw into the centerless grinder for machining. After machining, the locking nut is removed, and the machined valve seat is collected in a tray. However, this method relies on manual feeding, requiring two workers to coordinate and the operator to maintain focus to prevent misoperation in order to keep pace with the grinder. This method is labor-intensive and consumes a significant amount of manpower.

[0004] Furthermore, most existing automated feeding devices are unsuitable for small, lightweight ring-shaped products. For example, some automated feeding devices for bearing outer rings focus on sorting by large and small end faces, while automated feeders for bar stock tend to transport the entire product as a whole. Neither can solve the problem of how to vertically, continuously, and stably place and transport small ring valve seats into a centerless grinder for processing. At the same time, because individual valve seats are very lightweight, they easily accumulate in the slideway if ordinary slideways are used, failing to achieve the desired continuous feeding effect.

[0005] Therefore, it is necessary to design a carbide valve seat centerless grinding feeding device to solve the above-mentioned technical problems. Utility Model Content

[0006] In order to overcome the shortcomings of the existing cemented carbide valve seat centerless mill feeding method, which relies on manual operation, resulting in high labor intensity, high labor consumption, low production efficiency and risk of misoperation, and difficulty in achieving stable and continuous conveying of small and lightweight circular products, this utility model provides a cemented carbide valve seat centerless mill feeding device.

[0007] The technical solution is as follows: A cemented carbide valve seat centerless mill feeding device includes a feeding mechanism, a guide rod, a feeding mechanism, a centerless mill, a valve seat, and a controller. The feeding mechanism and the feeding mechanism are arranged sequentially from front to back on the front side of the centerless mill. The feeding mechanism includes a vibratory plate, a discharge pipe, and a mounting bracket. The mounting bracket is located on the front side of the centerless mill, and the vibratory plate is installed on the top of the mounting bracket. The outlet end of the vibratory plate faces the rear and is connected to and communicates with the discharge pipe. The feeding mechanism includes a V-groove, a fixed block, a tray, a linear vibrating feeder, and a feeding bracket. The feeding bracket is located on the front side of the centerless mill and behind the mounting bracket. The linear vibrating feeder is installed on the top of the feeding bracket. The linear vibrating feeder is of adjustable frequency type.

[0008] As a further preferred embodiment, it also includes a tray, a fixing block, and a V-groove. The tray is fixedly connected to the top of the linear vibrating feeder, and the V-groove is fixedly connected to the top of the tray by the fixing block. The tip of the V-groove is fixedly connected to the fixing block with the bottom side facing downward.

[0009] As a further preferred option, a guide rod is also included. The guide rod is formed by bending round steel into an L-shaped structure. Its short side enters the outlet end of the feed pipe, and its long side extends horizontally and passes through the centerless mill platform area and through the V-groove. The centerless mill, vibratory plate and linear vibratory feeder are all electrically connected to the controller.

[0010] As a further preferred option, the feed pipe is a bent pipe structure with an inner diameter slightly larger than the outer diameter of the valve seat.

[0011] As a further preferred option, the short side of the guide rod is provided with a tapered chamfer at the feed end, and the outer diameter of the guide rod is smaller than the inner diameter of the valve seat.

[0012] As a further preferred option, the height of the V-groove is adapted to the outer contour of the valve seat on the guide rod.

[0013] As a further preferred embodiment, a clamping mechanism is also included. The clamping mechanism is located inside the centerless mill and includes a pressure bar, a baffle, fastening bolts, and a suspension structure. Guide grooves are symmetrically opened on the left and right sides of the upper rear side of the centerless mill. The two ends of the baffle slide into the guide grooves on the corresponding sides. The baffle is locked and positioned by fastening bolts. A suspension structure is provided on the lower front side of the baffle. Two pressure bars are installed on the baffle by the suspension structure and can float up and down. The axis of the pressure bars is set horizontally and is used to press against the valve seat string on the guide rod.

[0014] As a further preferred embodiment, the suspension structure includes limit rods and limit blocks. Two limit rods are fixedly connected to the rear side of the baffle. Each limit rod is slidably engaged with a corresponding pressure bar. The pressure bar is a hollow circular tube structure with its axis set horizontally and located above the guide rod. A limit block is provided at the top of the limit rod to prevent the pressure bar from falling out.

[0015] As a further preferred option, it also includes a mounting bracket and a material box, with the mounting bracket fixedly connected to the rear side of the centerless mill, and the material box slidingly mounted on the mounting bracket.

[0016] As a further preferred option, a filter frame is also included, which is slidably embedded inside the material box.

[0017] The present invention has the following advantages: 1. The present invention sets an L-shaped guide rod through the feeding, conveying and centerless grinding areas, and works with a vibratory plate and a linear vibratory feeder to realize the automatic feeding and continuous pushing of the valve seat. This achieves the effect of automatically feeding the valve seat from the vibratory plate through the feed pipe into the guide rod, and continuously pushing it to the centerless grinding for processing through the V-groove, thereby replacing the manual feeding and conveying operation.

[0018] 2. This utility model, by setting a pressing mechanism consisting of a pressure bar and an adjustable baffle inside the centerless mill, with the pressure bar pressing above the valve seat string and limited by the baffle, effectively restricts the axial movement and radial runout of the lightweight valve seat during high-speed grinding, thus ensuring processing stability and product accuracy.

[0019] 3. This utility model uses a water tank-type material box with a built-in filter frame at the end of the guide rod to allow the processed valve seat to fall into the water. This achieves the effect of using the buffering effect of water to prevent the product from being damaged by collision due to free fall. At the same time, the water flow washes away the metal debris and dust generated during processing, and the filter frame achieves the effect of separating the product from the debris and sewage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a structural diagram of the vibratory feeder, feeding pipe, and mounting bracket of this utility model.

[0022] Figure 3 This is a structural schematic diagram of the feeding mechanism, guide rod, and material feeding mechanism of this utility model.

[0023] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0024] Figure 5 This is a structural schematic diagram of the V-groove, fixing block, and tray components of this utility model.

[0025] Figure 6 This is a structural diagram of the components of this utility model, including the vibratory feeder, the feeding tube, and the linear vibratory feeder.

[0026] Figure 7 This is a structural schematic diagram of the pressure bar, baffle, and guide groove components of this utility model.

[0027] Figure 8 This is a structural diagram of the pressure bar, limiting rod, and limiting block of this utility model.

[0028] Figure 9 This is a schematic diagram of the material box and filter frame of this utility model.

[0029] Wherein: 1-Feeding mechanism, 101-Vibrating plate, 102-Discharge pipe, 103-Mounting bracket, 2-Guide rod, 3-Feeding mechanism, 301-V-groove, 302-Fixing block, 303-Pattern, 304-Linear vibrating feeder, 305-Feeding bracket, 4-Pressure mechanism, 401-Pressure bar, 402-Baffle, 403-Guide groove, 404-Fasting bolt, 405-Limit rod, 406-Limit block, 5-Centerless mill, 501-Mounting bracket, 6-Material box, 601-Filter frame, 7-Valve seat, 8-Controller. Detailed Implementation

[0030] Example: A cemented carbide valve seat centerless grinding feeding device, such as... Figures 1-7 As shown, the device includes a feeding mechanism 1, a guide rod 2, a feeding mechanism 3, a centerless mill 5, a valve seat 7, and a controller 8. The feeding mechanism 1 and the feeding mechanism 3 are arranged sequentially from front to back on the front side of the centerless mill 5. The feeding mechanism 1 includes a vibratory feeder 101, a discharge pipe 102, and a mounting bracket 103. The mounting bracket 103 is located on the front side of the centerless mill 5. The vibratory feeder 101 is mounted on the top of the mounting bracket 103. The outlet end of the vibratory feeder 101 faces the rear side and is connected to and communicates with the discharge pipe 102. The discharge pipe 102 is a 90° bent pipe structure, and its inner diameter is slightly larger than the outer diameter of the valve seat 7. The feeding mechanism 3 includes a V-groove 301, a fixing block 302, a tray 303, a linear vibrating feeder 304, and a feeding bracket 305. The feeding bracket 305 is located in front of the centerless mill 5 and behind the mounting bracket 103. The linear vibrating feeder 304 is mounted on top of the feeding bracket 305. The linear vibrating feeder 304 is an adjustable frequency type to facilitate adjustment of the output force and ensure smooth transmission of different models of valve seat 7 products. The top of the linear vibrating feeder 304 is connected to the tray 303 by bolts, and the top of the tray 303 is connected to the fixing block 302. A V-groove 301 is fixedly connected, with the tip of the V-groove 301 facing downwards and connected to the fixed block 302 by welding. The guide rod 2 is formed by bending round steel into an L-shaped structure. The short side of the guide rod 2 has a tapered chamfer at the feed end. The outer diameter of the guide rod 2 is smaller than the inner diameter of the valve seat 7. Its short side passes through the outlet end of the feed pipe 102, and its long side extends horizontally and passes through the machine area of ​​the centerless mill 5 and through the V-groove 301. The height of the V-groove 301 is adapted to the outer contour of the valve seat 7 on the guide rod 2. The centerless mill 5, the vibratory plate 101 and the linear vibrating feeder 304 are all electrically connected to the controller 8.

[0031] like Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, it also includes a clamping mechanism 4, which is located inside the centerless mill 5. The clamping mechanism 4 includes a pressure bar 401, a baffle 402, a fastening bolt 404, and a suspension structure. Guide grooves 403 are symmetrically opened on the left and right sides of the upper rear side of the centerless mill 5. The two ends of the baffle 402 are respectively slidably engaged with the guide grooves 403 on the corresponding sides. The baffle 402 is locked and positioned by the fastening bolt 404. A suspension structure is provided on the lower front side of the baffle 402. The two pressure bars 401 are respectively installed on the baffle 402 by the suspension structure and can float up and down. The axis of the pressure bar 401 is set horizontally and is used to press the valve seat 7 string on the guide rod 2.

[0032] like Figure 8 As shown, the suspension structure includes a limiting rod 405 and a limiting block 406. Two limiting rods 405 are fixedly connected to the rear side of the baffle 402. Each limiting rod 405 is slidably engaged with the corresponding pressure rod 401. The pressure rod 401 is a hollow circular tube structure with its axis set horizontally and located above the guide rod 2. It is used to press against the outer periphery of the valve seat 7 by its own weight. The top of the limiting rod 405 is provided with a limiting block 406 to restrict the pressure rod 401 from coming out, so that the pressure rod 401 can float up and down within a certain range but cannot come out forward, backward or left and right.

[0033] like Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 9 As shown, it also includes a mounting frame 501, a material box 6, and a filter frame 601. The mounting frame 501 is connected to the rear side of the centerless mill 5 by bolts. The material box 6 is slidably mounted on the mounting frame 501, and the filter frame 601 is slidably embedded inside the material box 6.

[0034] During operation, the operator feeds the carbide valve seats 7 to be processed into the vibratory feeder 101 in batches. Then, the short side bend of the L-shaped guide rod 2 is first inserted through a ring of valve seat 7, and then the whole thing is inserted into the feed tube 102 for end limiting. After the vibratory feeder 101 is powered on, it generates directional vibration, which causes the flat valve seats 7 to move orderly towards the outlet end and enter the 90° bend-type feed tube 102 connected to it. Under the action of gravity, the valve seats 7 slide down along the feed tube 102, and its inner hole aligns with and fits into the conical feed end of the L-shaped guide rod 2. Since the outer diameter of the guide rod 2 is slightly smaller than the inner diameter of the valve seat 7, the valve seat 7 can be smoothly inserted and kept in a vertical state, and then slide into the V-groove 301 of the feeding mechanism 3.

[0035] Multiple valve seats 7 are sequentially threaded onto the guide rod 2 to form a string. After the linear vibrating feeder 304 is started, it generates high-frequency micro-amplitude vibration. This vibration is transmitted to the V-groove 301 through the tray 303 and the fixing block 302. The V-groove 301 touches the string of valve seats 7 with its tip, pushing it forward smoothly and continuously. The string of valve seats 7 moves along the long side of the guide rod 2, passes through the entire centerless grinder 5, and enters the grinding area. The tray 303 is located below the V-groove 301 to catch valve seats 7 that are accidentally dropped, preventing them from scattering.

[0036] Inside the centerless grinder 5, two pressure bars 401 are respectively fitted onto the limiting rods 405 fixed to the rear side of the baffle 402. The pressure bars 401 are hollow circular tubes that can slide freely up and down along the limiting rods 405, and their tops are equipped with limiting blocks 406 to prevent them from coming off. The pressure bars 401 hang down under their own weight and lightly press on the outer circumference of the top of the valve seat 7 string on the guide rod 2. The outer diameter of the pressure bars 401 is similar to the outer diameter of the valve seat 7, and its length covers the grinding area of ​​the grinding wheel. Since the pressure bars 401 are floating, they can effectively suppress the radial runout and axial displacement of the valve seat 7 during the high-speed grinding process, and will not hinder the continuous forward movement of the valve seat 7 string under the push of the V-groove 301.

[0037] During processing, the baffle 402 slides into the guide groove 403 on the upper rear side of the centerless mill 5 at both ends and is locked in place by the fastening bolts 404, thereby adjusting the overall front-to-back position of the pressure bar 401 to ensure that it is directly above the grinding area. This clamping mechanism, through its floating design, ensures processing stability while accommodating the needs of automated continuous feeding, avoiding interference of rigid clamping with material conveying.

[0038] After processing, the valve seat 7 is pushed to the end of the guide rod 2 and falls freely after detaching from the core rod. A material box 6 is set directly below the falling position. The material box 6 is filled with clean tap water. When the valve seat 7 falls into the water, the water's cushioning effect can effectively prevent the product from being damaged by collision. At the same time, the water flow can wash away the metal shavings and dust generated during processing, achieving preliminary cleaning. The filter frame 601 inside the material box 6 can separate the valve seat 7 from the shavings and sewage for easy collection later. The entire material box 6 is mounted on the mounting frame 501 by sliding. The mounting frame 501 is fixedly connected to the rear side of the centerless mill 5, making it convenient to remove and replace the material box 6.

[0039] The entire automated process is coordinated and controlled by controller 8. According to the preset program, controller 8 synchronously starts or adjusts the operating status of vibratory feeder 101, linear vibratory feeder 304 and centerless mill 5 to realize fully automatic continuous operation of loading, feeding, processing and unloading.

Claims

1. A cemented carbide valve seat centerless grinding feeding device, characterized in that: The system includes a feeding mechanism (1), a guide rod (2), a feeding mechanism (3), a centerless mill (5), a valve seat (7), and a controller (8). The feeding mechanism (1) and the feeding mechanism (3) are arranged sequentially from front to back on the front side of the centerless mill (5). The feeding mechanism (1) includes a vibratory feeder (101), a discharge pipe (102), and a mounting bracket (103). The mounting bracket (103) is located on the front side of the centerless mill (5), and the vibratory feeder (101) is mounted on the top of the mounting bracket (103). 1) The outlet end faces the rear side and is connected and communicated with the feed pipe (102). The feeding mechanism (3) includes a V-groove (301), a fixed block (302), a tray (303), a linear vibrating feeder (304), and a feeding bracket (305). The feeding bracket (305) is located in front of the centerless mill (5) and behind the mounting bracket (103). The linear vibrating feeder (304) is installed on the top of the feeding bracket (305). The linear vibrating feeder (304) is an adjustable frequency type.

2. The carbide valve seat centerless grinding feeding device as described in claim 1, characterized in that: It also includes a tray (303), a fixing block (302) and a V-groove (301). The top of the linear vibrating feeder (304) is fixedly connected to the tray (303). The top of the tray (303) is fixedly connected to the V-groove (301) by the fixing block (302). The tip of the V-groove (301) is fixedly connected to the fixing block (302) with its tip facing downward.

3. The carbide valve seat centerless grinding feeding device as described in claim 2, characterized in that: It also includes a guide rod (2), which is formed by bending round steel into an L-shaped structure. Its short side enters the outlet end of the feed pipe (102), and its long side extends horizontally and passes through the machine area of ​​the centerless mill (5) and through the V-groove (301). The centerless mill (5), the vibratory plate (101) and the linear vibratory feeder (304) are all electrically connected to the controller (8).

4. The carbide valve seat centerless grinding feeding device as described in claim 3, characterized in that: The feed pipe (102) is a bent pipe structure, and its inner diameter is slightly larger than the outer diameter of the valve seat (7).

5. The carbide valve seat centerless grinding feeding device as described in claim 4, characterized in that: The short side of the guide rod (2) is provided with a tapered chamfer, and the outer diameter of the guide rod (2) is smaller than the inner diameter of the valve seat (7).

6. The carbide valve seat centerless grinding feeding device as described in claim 5, characterized in that: The height of the V-groove (301) is adapted to the outer contour of the valve seat (7) on the guide rod (2).

7. The carbide valve seat centerless grinding feeding device as described in claim 6, characterized in that: It also includes a pressing mechanism (4), which is located inside the centerless mill (5). The pressing mechanism (4) includes a pressure bar (401), a baffle (402), a fastening bolt (404), and a suspension structure. The left and right sides of the upper rear side of the centerless mill (5) are symmetrically provided with guide grooves (403). The two ends of the baffle (402) are respectively slidably engaged with the guide grooves (403) on the corresponding sides. The baffle (402) is locked and positioned by the fastening bolts (404). The lower front side of the baffle (402) is provided with a suspension structure. The two pressure bars (401) are respectively installed on the baffle (402) by the suspension structure, and the axis of the pressure bar (401) is set horizontally to press the valve seat (7) string on the guide rod (2).

8. The carbide valve seat centerless grinding feeding device as described in claim 7, characterized in that: The suspension structure includes a limiting rod (405) and a limiting block (406). Two limiting rods (405) are fixedly connected to the rear side of the baffle (402). Each limiting rod (405) is slidably engaged with the corresponding pressure rod (401). The pressure rod (401) is a hollow round tube structure with its axis set horizontally and located above the guide rod (2). It is used to press against the outer periphery of the valve seat (7) by its own weight. The top of the limiting rod (405) is provided with a limiting block (406) to restrict the pressure rod (401) from falling out, so that the pressure rod (401) can float up and down within a certain range but cannot fall out forward, backward or left and right.

9. The carbide valve seat centerless grinding feeding device as described in claim 8, characterized in that: It also includes a mounting bracket (501) and a material box (6). The mounting bracket (501) is fixedly connected to the rear side of the centerless mill (5), and the material box (6) is slidably mounted on the mounting bracket (501).

10. The carbide valve seat centerless grinding feeding device as described in claim 9, characterized in that: It also includes a filter frame (601), which is slidably embedded inside the material box (6).

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