Improved automatic machining equipment for steel ball valve and process thereof

Abstract

The application relates to the technical field of valve production and manufacturing, and particularly discloses an improved automatic machining equipment for steel ball valves and a process thereof, which comprises a workbench; a clamping positioning device for the up-down clamping and positioning of a ball is assembled on the workbench, and a polishing chamfering device for synchronous polishing of ports at both sides of a ball passage is assembled on the workbench; the equipment provided by the application has high applicability, the processing time of a single ball is shortened, the same-size balls can be standardized processed, the uniformity of the processing quality is ensured, and the production efficiency of batch processing and manufacturing is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve production and manufacturing, and particularly discloses an improved steel ball valve automatic machining equipment and process. BACKGROUND

[0002] The ball valve is a valve with a ball as the opening and closing member and driven by a valve stem to make rotary movement around the ball valve axis, which is generally arranged in a pipeline to serve as a mechanical control element for controlling fluid, gas and other media to achieve the functions of closing, opening, converging, parallel flow and reversing. The present application provides an improved steel ball valve, which has the following improved features: the valve seat sealing pair adopts a hidden design to avoid direct damage from the medium; the wear-resistant ball valve is provided with a high-wear-resistant sheath made of special materials and processes, and the channel surface is sprayed with tungsten carbide to achieve multi-layer protection and enhance wear resistance; the high-wear-resistant sheath adopts a detachable structure, so that users can replace it according to the wear condition of the valve in the future to reduce the production and use cost; the ball is made of special materials and processes, and is sprayed with a high-hardness tungsten carbide coating to enhance wear resistance and erosion resistance.

[0003] As the opening and closing member of the improved steel ball valve, the ball needs to ensure the structural precision of the ball. After the turning machining of the channel is completed, the port positions on both sides of the channel of the ball need to be deburred and chamfered. In the prior art, automatic chamfering equipment is generally used for automatic machining, but the existing equipment generally has the following defects: 1) it can only chamfer and polish the ports on both sides of the ball channel one by one; 2) the uniformity of polishing and chamfering for the two ports of the same ball and different balls is poor, and the uniformity and standardization of machining quality are not achieved. SUMMARY

[0004] To solve the above problems, the present application provides an improved steel ball valve automatic machining equipment and process to solve the problems mentioned in the background.

[0005] To achieve the above purpose, the present application adopts the following technical solution: an improved steel ball valve automatic machining equipment, comprising a workbench; a clamping positioning device for positioning the ball up and down is assembled on the workbench, and a polishing chamfering device for synchronous polishing of the ports on both sides of the channel port of the ball is also assembled on the workbench; the clamping positioning device comprises a clamping driving mechanism mounted on the workbench and a plurality of clamping frames drivingly connected with the clamping driving mechanism; a plurality of clamping frames are movably mounted on the workbench and evenly distributed around a vertical axis; when the clamping driving mechanism is in the driving state, a plurality of clamping frames synchronously approach or synchronously move away from the distribution center; when the ball is clamped between a plurality of clamping frames, the center axis of the ball channel coincides with the distribution center axis of a plurality of clamping frames.

[0006] The grinding and chamfering device is distributed among the multiple clamping frames. The grinding and chamfering device includes a lifting component with a vertical rotation drive and a spacing adjustment frame fixedly connected to the lifting end of the lifting component. Two vertically opposite motion adjustment stroke plates are installed on the spacing adjustment frame. Chamfering execution components are horizontally arranged opposite each other on the two stroke plates. When grinding and chamfering is performed, the lifting component and the spacing adjustment component rotate around the distribution center axis of the multiple clamping frames.

[0007] Preferably, the clamping frame includes a sliding vertical plate slidably disposed on the workbench surface, and a lower support roller is horizontally rotatably mounted on the side of the sliding vertical plate facing the distribution center of the clamping frame; an upper pressure roller assembly is assembled on the sliding vertical plate, and the upper pressure roller assembly includes a horizontally rotatable upper pressure roller, which is located above the lower support roller and the vertical relative distance is adjustable.

[0008] Preferably, the sliding vertical plate has a support plate horizontally fixedly connected to the same side plate surface as the lower support roller. The support plate is located below the lower support roller and extends relative to the lower support roller in a direction close to the distribution center of the clamping frame.

[0009] Preferably, the chamfering actuator includes a feed cylinder horizontally fixedly connected to the stroke plate and an abrasive block fixed to the output end of the feed cylinder.

[0010] Preferably, the clamping drive mechanism includes a drive cylinder horizontally fixed to the bottom of the workbench surface, a rotating cylinder vertically rotatably mounted on the workbench, and multiple connecting rods corresponding to the multiple clamping frames; a rack is horizontally fixed to the output end of the drive cylinder, and a circular disc and a gear ring are fixed to the upper and lower ends of the rotating cylinder, respectively, with the gear ring meshing with the rack, and the two ends of the connecting rods are respectively hinged to the circular disc and the sliding vertical plate.

[0011] Preferably, the abrasive block has a right-angled trapezoidal structure and the abrasive layer is located on the surface of the hypotenuse; two sets of chamfering execution components distributed at the top and bottom are vertically opposite each other, and in the set of chamfering execution components located at the top, the surface of the abrasive block with the hypotenuse is vertically downward.

[0012] Preferably, the upper pressure roller assembly further includes a pressing cylinder vertically fixed to the sliding vertical plate and a sliding roller seat vertically slidably mounted on the sliding vertical plate; the sliding roller seat is fixed to the output end of the pressing cylinder, and the upper pressure roller is rotatably mounted on the sliding roller seat.

[0013] Preferably, a frustum-shaped material guiding umbrella is erected at the top of the spacing adjusting frame. When the feeding cylinder outputs in a zero-elongation state, the spacing adjusting frame and the chamfering execution assembly are both within the coverage range of the material guiding umbrella.

[0014] In addition, the present invention also provides an improved automatic processing technology for steel ball valves. The specific steps of this processing technology are as follows:

[0015] S1. Pre-adjust the equipment for steel ball valve spheres to be processed with the same size.

[0016] S2. Place the spheres to be processed and clamp and fix the positions of the spheres through the clamping positioning device.

[0017] S3. Automatically rotate and chamfer the fixed spheres through the grinding chamfering device.

[0018] The above technical solutions have the following advantages or beneficial effects: The present invention provides an improved automatic processing equipment for steel ball valves. Through the provided clamping positioning device, spheres of different sizes can be clamped, fixed, and processed for positioning. Through the grinding chamfering device配套设置 with the clamping positioning device, the two side ports of the sphere channel can be chamfered synchronously. In short, the equipment provided by the present invention can chamfer the two side port positions of the channels of steel ball valve spheres with different sizes within the applicable range during the processing and manufacturing of improved steel ball valves. It has high applicability, shortens the processing time for a single sphere, can process spheres of the same size in a standardized manner, ensures the unity of processing quality, and improves the production efficiency of batch processing and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, the present invention and its features, shapes, and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale, and the emphasis is on showing the gist of the present invention.

[0020] Figure 1 is a three-dimensional structure schematic diagram of an improved automatic processing equipment for steel ball valves provided by the present invention from one perspective.

[0021] Figure 2 is a three-dimensional structure schematic diagram of an improved automatic processing equipment for steel ball valves provided by the present invention from another perspective.

[0022] Figure 3 is Figure 2 a partial enlarged schematic diagram of part A in

[0023] Figure 4 is a top view of an improved automatic processing equipment for steel ball valves provided by the present invention.

[0024] Figure 5 yes Figure 4 A cross-sectional view of BB.

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of a sphere.

[0026] Figure 7 This is a flowchart of an improved automatic processing technology for steel ball valves provided by the present invention.

[0027] In the diagram: 1. Workbench; 11. Slide groove; 2. Clamping and positioning device; 21. Clamping drive mechanism; 211. Drive cylinder; 212. Rack; 213. Rotating cylinder; 2131. Circular disc; 2132. Gear ring; 214. Connecting rod; 22. Clamping frame; 221. Sliding vertical plate; 2211. Support plate; 2212. Lower support roller; 222. Upper pressure roller assembly; 2221. Pressing cylinder; 2222. Sliding roller seat; 2223. Upper pressure roller; 3. Grinding and chamfering device; 31. Rotary motor; 33. Spacing adjustment frame; 331. End plate; 332. Guide rod; 333. Bidirectional lead screw; 3331. Handwheel; 334. Stroke plate; 335. Material guide umbrella; 34. Chamfering execution assembly; 341. Advancement cylinder; 342. Abrasive block. Detailed Implementation

[0028] The following detailed description of the embodiments, with reference to the accompanying drawings, aims to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the concept and technical solutions of the present invention, and to facilitate its implementation, but is not intended to limit the present invention.

[0029] like Figure 4 As shown, an improved automatic processing equipment for steel ball valves includes a worktable 1; the worktable 1 is equipped with a clamping and positioning device 2 for clamping and positioning the ball from top to bottom, and a grinding and chamfering device 3 for simultaneously grinding the two ends of the ball channel. Figure 6 The image shown is a three-dimensional view of a sphere adapted to the general structural features of the present invention.

[0030] like Figure 1 As shown, the clamping and positioning device 2 includes a clamping drive mechanism 21 installed on the worktable 1 and four clamping frames 22 that are driven and connected to the clamping drive mechanism. The four clamping frames 22 are movably installed on the worktable 1 and are evenly distributed around a certain vertical axis. When the clamping drive mechanism 21 is in the driving state, the four clamping frames 22 move closer to or further away from their distribution center at the same time. When the ball is clamped between the four clamping frames, the central axis of the ball channel coincides with the distribution center axis of the four clamping frames 22.

[0031] like Figure 1 ,Figure 2 and Figure 5 As shown, the clamping drive mechanism 21 includes a drive cylinder 211 horizontally fixed to the bottom of the workbench 1 via a fixed plate, a rotating cylinder 213 vertically rotatably mounted on the workbench 1, and four connecting rods 214 corresponding to the four clamping frames 22. A rack 212 is horizontally fixed at the output end of the drive cylinder 211. A circular disc 2131 and a gear ring 2132 are welded and fixed at the upper and lower ends of the rotating cylinder 213, respectively. The gear ring 2132 meshes with the rack 212. The two ends of the connecting rods 214 are hinged to the circular disc 2131 and the sliding vertical plate 221, respectively.

[0032] like Figure 1 and Figure 5 As shown, the workbench 1 is provided with four sliding grooves 11 corresponding to four clamping frames 22. Each clamping frame 22 includes a sliding vertical plate 221 slidably installed in the corresponding sliding groove 11. A lower support roller 2212 is horizontally rotatably mounted on the side of the sliding vertical plate 221 facing the distribution center of the clamping frame 22. A support plate 2211 is horizontally welded to the same side of the sliding vertical plate 221 as the lower support roller 2212. The support plate 2211 is located below the lower support roller 2212 and extends relative to the lower support roller 2212 in the direction close to the distribution center of the clamping frame 22. The relatively extended support plate 2211 can be used to support the ball to be processed before clamping. 1. An upper pressure roller assembly 222 is mounted on the upper roller. The upper pressure roller assembly 222 includes an upper pressure roller 2223 that is horizontally rotatably arranged. The upper pressure roller 2223 is located above the lower support roller 2212 and the vertical relative distance is adjustable. In this embodiment, the upper pressure roller 2223 and the lower support roller 2212 have the same structural dimensions, and the upper pressure roller 2223 is preferably distributed directly above the lower support roller 2212. The upper pressure roller assembly 222 also includes a pressing cylinder 2221 that is vertically fixed to the sliding vertical plate 221 by bolts and a sliding roller seat 2222 that is vertically slidably mounted on the sliding vertical plate 221. The sliding roller seat 2222 is welded to the output end of the pressing cylinder 2221, and the upper pressure roller 2223 is rotatably mounted on the sliding roller seat 2222.

[0033] During the chamfering and grinding process of the two port positions of the ball valve's channel, the ball is first clamped and positioned by the clamping and positioning device 2. This ensures that the central axis of the cylindrical channel of the clamped ball coincides with the rotational central axis of the grinding and chamfering device 3, facilitating the subsequent synchronous rotational grinding and chamfering of the two port positions of the ball channel by the grinding and chamfering device 3. Specifically, during the clamping operation, the front of the ball's channel opening is facing upwards, and the grinding and chamfering device 3 passes through the ball's channel. Finally, the ball is stably placed on the four support plates 2211. Subsequently, the drive cylinder 211 is activated to move the rack 212, which in turn drives the gear ring 2132 to rotate the rotating cylinder 213. The rotating cylinder 213, through four connecting rods 214, pulls the four clamping frames 22 synchronously towards the distribution center. The ball slides, and then the four lower rollers 2212 move synchronously toward the spherical sidewall near the lower end of the channel port, eventually causing the ball to detach from the four support plates 2211. Instead, the four lower rollers 2212 vertically lift the ball. In this state, the four lower rollers 2212 complete the encircling contact with the ball. Subsequently, the four pressing cylinders 2221 are activated synchronously, causing the four sliding roller seats 2222 to slide down synchronously along the corresponding sliding vertical plates 221. The four upper pressure rollers 2223 move downward synchronously with the sliding roller seats 2222. Finally, the four upper pressure rollers 2223 will synchronously press against the spherical sidewall near the upper end of the ball channel. The ball is finally clamped between the four lower rollers 2212 and the four upper pressure rollers 2223. While completing the clamping and fixing, the alignment and coincidence of the central axis of the cylindrical channel of the ball and the rotation central axis of the grinding and chamfering device 3 are achieved.

[0034] It should be noted that, in order to prevent the ball from rotating during close-fitting rotary grinding, in this embodiment, a layer of rubber is attached to the roller surface of both the lower roller 2212 and the upper pressure roller 2223 to increase contact friction. In addition, when processing balls of the same size, it is necessary to fix the extension output of the drive cylinder 211 when the ball is lifted, so as to determine the height of the ball when it is lifted, so that the grinding and chamfering device 3 can be adjusted accordingly.

[0035] like Figure 1 , Figure 2 and Figure 5As shown, the grinding and chamfering device 3 is distributed among the four clamping frames 22. The grinding and chamfering device 3 includes a vertically rotating lifting component and a spacing adjustment frame 33 welded to the lifting end of the lifting component. A rotary motor 31 is fixedly installed at the bottom of the worktable 1 via a fixing frame. The lifting component is specifically a lifting cylinder with its bottom fixed to the output end of the rotary motor 31. Two vertically opposing motion adjustment stroke plates 334 are installed on the spacing adjustment frame 33. The spacing adjustment frame 33 includes two vertically distributed and horizontally arranged end plates 331. The two end plates 331 are vertically connected by a bearing. A bidirectional lead screw 333 is rotatably mounted. A handwheel 3331 is fixed between the two reverse threaded sections of the bidirectional lead screw 333. Two guide rods 332 are vertically welded between the two end plates 331. The two guide rods 332 are symmetrically distributed on both sides of the bidirectional lead screw 333. Two stroke plates 334 slide vertically along the two guide rods 332 and are threadedly connected to the two threaded sections of the bidirectional lead screw 333. Chamfering actuators 34 are horizontally and oppositely arranged on both stroke plates 334. When grinding and chamfering are performed, the lifting component and the spacing adjustment component rotate around the distribution center axis of the four clamping frames 22.

[0036] like Figure 1 , Figure 3 and Figure 5 As shown, the chamfering actuator 34 includes an advance cylinder 341 horizontally fixed to the stroke plate 334 by bolts and an abrasive block 342 fixed to the output end of the advance cylinder 341. The connection between the abrasive block 342 and the output rod of the advance cylinder 341 is a threaded connection, which facilitates the replacement of the abrasive block 342. The abrasive block 342 has a right-angled trapezoidal structure and the abrasive layer is located on the surface of the hypotenuse. The two sets of chamfering actuators 34 distributed above and below are vertically opposite each other, and in the set of chamfering actuators 34 located above, the surface of the hypotenuse of the abrasive block 342 is vertically downward.

[0037] like Figure 1 , Figure 3 and Figure 5 As shown, a frustum-shaped guide umbrella 335 is upright at the top of the spacing adjustment frame 33. The guide umbrella 335 is welded to the end plate 331 located at the top. When the advance cylinder 341 is in the zero extension output state, the spacing adjustment frame 33 and the chamfering execution component 34 are both located under the coverage of the guide umbrella 335. In this state, when placing the ball, it is convenient to guide the ball through the guide umbrella 335. That is, as long as the guide umbrella 335 passes through the ball channel, the ball can be placed on the support plate 2211.

[0038] When determining the height at which the fixed sphere is clamped and lifted in the clamping and positioning device 2, firstly, the spacing between the upper and lower sets of chamfering actuators 34 needs to be adjusted according to the distance between the two ports on both sides of the sphere channel. Specifically, by rotating the handwheel 3331 to drive the bidirectional lead screw 333 to rotate, thereby driving the two travel plates 334 to move in opposite directions along the two guide rods 332, and then adjusting the distribution spacing of the upper and lower sets of chamfering actuators 34 so that their spacing is adapted to the distance between the two ports on both sides of the sphere channel. Subsequently, based on the height of the sphere clamping, the height of the spacing adjustment frame 33 is adjusted as a whole by the lifting component. Finally, the upper and lower sets of chamfering actuators 34 are adjusted to be in the position that can be aligned with the corresponding grinding positions of the two ports on both sides of the sphere.

[0039] When the sphere is clamped and formally ground and chamfered, the rotary motor 31 is started to drive the lifting component, the spacing adjustment frame 33, and the two sets of chamfering execution components 34 to rotate as a whole. At the same time, the four advance cylinders 341 synchronously drive the abrasive block 342 to move closer to the edge of the port. As the advance cylinders 341 continue to advance, the abrasive surface of the abrasive block 342 will contact the edge of the port and perform rotational grinding. In the advance state, because the abrasive surface of the abrasive block 342 is located at the bevel, the edge is rotated and chamfered while removing burrs from the port edge. When a certain degree of chamfering is reached, the output rod of the advance cylinder 341 stops extending, and finally completes the synchronous grinding and chamfering of the port positions on both sides of the sphere channel. After the chamfering is completed, the output rod of the advance cylinder 341 retracts, the grinding and chamfering device 3 stops working, and the grinding and chamfering device 3 is released, so that the processed sphere can be taken out.

[0040] The present invention provides an improved automatic processing equipment for steel ball valves, which can simultaneously grind and chamfer the port positions on both sides of the channel of steel ball valves of different sizes within the applicable range during the processing and manufacturing of improved steel ball valves. It has high applicability, shortens the processing time for a single ball, can perform standardized processing of balls of the same size, ensures the uniformity of processing quality, and improves the production efficiency of batch processing and manufacturing.

[0041] In addition, such as Figure 7 As shown, the present invention also provides an improved automatic processing technology for steel ball valves, the specific steps of which are as follows:

[0042] S1. Pre-adjust the equipment for steel ball valve balls of the same size to be processed; mainly to determine the lifting height of the ball in the clamping and positioning device 2 when it is in the clamping state, and to adjust the position of the two sets of chamfering execution components 34 in the grinding device based on the lifting height as a reference, and to adjust the position of the two sets of chamfering execution components 34 in the grinding device according to the distance between the two ports on both sides of the channel in the ball of the specific size to be processed.

[0043] S2. Place the sphere to be processed so that the sphere channel opening is in a vertical position and is placed on the four support plates 2211. Use the clamping and positioning device 2 to clamp and fix the sphere, so that the sphere is clamped between the four lower support rollers 2212 and the four upper pressure rollers 2223.

[0044] S3. The fixed sphere is automatically rotated and chamfered by the grinding and chamfering device 3. The abrasive blocks 342 in the upper and lower chamfering execution components 34 grind and chamfer the corresponding positions of the upper and lower ports of the sphere.

[0045] Those skilled in the art should understand that variations can be implemented by combining existing technology and the above embodiments, and will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here.

[0046] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An improved automatic processing equipment for steel ball valve, comprising a workbench (1); characterized in that: The workbench (1) is equipped with a bag clamping positioning device (2) for clamping and positioning the sphere and a polishing chamfering device (3) for synchronous polishing of the ports on both sides of the sphere passage opening; wherein: The bag clamping positioning device (2) comprises a bag clamping driving mechanism (21) mounted on the workbench (1) and a plurality of bag clamping frames (22) drivingly connected with the bag clamping driving mechanism; the plurality of bag clamping frames (22) are movably mounted on the workbench (1) and are circumferentially and uniformly distributed around a vertical axis, and when the bag clamping driving mechanism (21) is in a driving state, the plurality of bag clamping frames (22) synchronously approach or synchronously move away from the distribution center thereof; The polishing chamfering device (3) is distributed between the plurality of bag clamping frames (22), and the polishing chamfering device (3) comprises a lifting component vertically and rotationally driven and a spacing adjustment frame (33) fixedly connected to the lifting end of the lifting component, two stroke plates (334) vertically and oppositely moving adjusted are mounted on the spacing adjustment frame (33), and chamfering execution assemblies (34) are horizontally and oppositely provided on the two stroke plates (334); when polishing and chamfering, the lifting component and the spacing adjustment frame (33) rotate around the distribution center axis of the plurality of bag clamping frames (22); The bag clamping frame (22) comprises a sliding vertical plate (221) slidingly arranged on the tabletop of the workbench (1); The bag clamping driving mechanism (21) comprises a driving cylinder (211) horizontally fixed at the bottom end of the tabletop of the workbench (1), a rotating cylinder (213) vertically penetratingly and rotationally mounted on the workbench (1), and a plurality of connecting rods (214) one-to-one corresponding to the plurality of bag clamping frames (22); the output end of the driving cylinder (211) is horizontally fixedly provided with a rack (212), the upper and lower ends of the rotating cylinder (213) are respectively fixed with a circular ring disc (2131) and a gear ring (2132), the gear ring (2132) is engaged with the rack (212), and the two ends of the connecting rod (214) are respectively hinged to the circular ring disc (2131) and the sliding vertical plate (221).

2. The improved automatic machining equipment for steel ball valve according to claim 1, characterized in that: A lower supporting roller (2212) is horizontally and rotationally mounted on the side surface of the sliding vertical plate (221) facing the distribution center of the bag clamping frame (22); an upper pressing roller assembly (222) is assembled on the sliding vertical plate (221), and the upper pressing roller assembly (222) comprises an upper pressing roller (2223) horizontally and rotationally arranged, and the upper pressing roller (2223) is located above the lower supporting roller (2212) and has a vertically adjustable opposite distance.

3. The improved automatic machining equipment for steel ball valve according to claim 2, characterized in that: The sliding vertical plate (221) is horizontally and fixedly connected with a supporting plate (2211) on the same side surface of the lower supporting roller (2212), the supporting plate (2211) is located below the lower supporting roller (2212), and the supporting plate (2211) protrudes relative to the lower supporting roller (2212) in the direction close to the distribution center of the bag clamping frame (22).

4. The improved automatic machining equipment for steel ball valve according to claim 1, characterized in that: The chamfer execution assembly (34) comprises a carryover air cylinder (341) fixed horizontally on the stroke plate (334) and an abrasive block (342) fixed on the output end of the carryover air cylinder (341).

5. The improved automatic machining equipment for steel ball valve according to claim 4, characterized in that: The abrasive block (342) is in a right-angled trapezoidal structure and the abrasive layer is located on the hypotenuse plane; two groups of chamfer execution assemblies (34) are vertically and oppositely arranged on the upper and lower sides, and in the group of chamfer execution assemblies (34) on the upper side, the hypotenuse plane of the abrasive block (342) is vertically arranged downward.

6. The improved automatic machining equipment for steel ball valve according to claim 2, characterized in that: The upper pressing roller assembly (222) further comprises a pressing air cylinder (2221) fixed vertically on the sliding vertical plate (221) and a sliding roller seat (2222) vertically and slidingly installed on the sliding vertical plate (221); the sliding roller seat (2222) is fixed on the output end of the pressing air cylinder (2221), and the upper pressing roller (2223) is rotatably installed on the sliding roller seat (2222).

7. The improved automatic machining equipment for steel ball valve according to claim 4, characterized in that: The top end of the spacing adjusting frame (33) is vertically provided with a circular table-shaped material guiding umbrella (335), and when the carryover air cylinder (341) is in a zero elongation output state, the spacing adjusting frame (33) and the chamfer execution assembly (34) are located within the covering range of the material guiding umbrella (335).

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