Die hole wall polishing equipment

Abstract

The invention belongs to the technical field related to polishing, and particularly discloses mold hole wall polishing equipment which comprises a machine base and a machine frame installed on the upper end face of the machine base, a translation driving mechanism is installed at the upper end of the machine frame, and a vertical driving mechanism is horizontally installed outside the translation driving mechanism in a sliding mode. A mounting seat is vertically and slidably mounted outside the vertical driving mechanism, a U-shaped seat is arranged on the outer surface of the mounting seat, a mounting frame is connected to the interior of the U-shaped seat through an arranged transmission mechanism, the upper end of the mounting frame is slidably connected with the top wall of the inner side of the U-shaped seat, and a particle spraying and polishing mechanism is arranged in the mounting frame; a first machining bin is fixedly installed on the side, away from the rack, of the upper end face of the machine base, a second machining bin is installed at the rear end of the interior of the first machining bin in a communicating mode, and a mold positioning mechanism is arranged in the second machining bin.

Description

Technical Field

[0001] The invention belongs to the technical field related to polishing, and specifically discloses a mold hole wall polishing device. Background Art

[0002] Valves are control components in fluid delivery systems, with functions such as shutoff, regulation, flow diversion, non-return, pressure stabilization, flow diversion and overflow pressure relief. Valves can be used to control the flow of various types of fluids such as air, water vapor, various corrosive media, mud, oil, liquid metal and radioactive media. Valves are often in relatively harsh working conditions and are subject to high-temperature corrosion and erosion by gasoline, diesel and other gases, as well as friction between the valve itself and the valve seat; therefore, valve materials must have sufficient thermal strength, high-temperature corrosion resistance, oxidation resistance, wear resistance and impact resistance at the highest working temperature;

[0003] When producing valve molds, the inside needs to be polished. However, since the internal cavity of the valve is mostly curved, the existing polishing equipment cannot polish the internal curved area, so manual polishing has been used. The efficiency is low, and there is no fixed workpiece suitable for valve polishing. The operation is inconvenient. Therefore, we need to improve it. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the background technology, and the proposed mold hole wall polishing equipment includes a machine base and a frame installed on the upper end face of the machine base, a translational drive mechanism is installed on the upper end of the frame, a vertical drive mechanism is installed on the outside of the translational drive mechanism for horizontal sliding, a mounting seat is installed on the outside of the vertical drive mechanism for vertical sliding, a U-shaped seat is arranged on the outer surface of the mounting seat, a mounting frame is connected to the inside of the U-shaped seat through a transmission mechanism, the upper end of the mounting frame is slidably connected to the inner top wall of the U-shaped seat, a particle spraying polishing mechanism is arranged inside the mounting frame, a first processing chamber is fixedly installed on the upper end face of the machine base and on one side away from the frame, a second processing chamber is installed on the rear end of the first processing chamber, and a positioning mold mechanism is arranged inside the second processing chamber.

[0005] Preferably, the transmission mechanism includes a No. 1 motor fixedly mounted on one side of the outer wall of the U-shaped seat, the outside of the No. 1 motor output shaft is connected to a screw rod through a synchronous wheel assembly, the screw rod is rotationally engaged with the U-shaped seat, and the mounting frame is threadedly engaged with the screw rod.

[0006] Preferably, the particle spraying and polishing mechanism includes a rotating shaft rotatably installed inside the mounting frame, a gear is provided at the upper end of the rotating shaft, a vertical frame is fixedly mounted on the lower outer side of the rotating shaft, the vertical frame is rotatably installed inside the lower part of the mounting frame, a No. 2 motor is fixedly installed on one side of the outer wall of the vertical frame, the output shaft of the No. 2 motor is connected to a double-pass particle spraying pipe through a set transmission shaft, a particle feeding pipe is installed at the lower part of the double-pass particle spraying pipe, and a swing mechanism is provided above the mounting frame.

[0007] Preferably, the swing mechanism includes an L-shaped frame fixedly arranged on one side above the mounting frame, a push cylinder is installed inside the L-shaped frame, a rack is fixedly installed on the telescopic end of the push cylinder, the rack is meshed with the gear, and the bottom of the rack is slidably matched with the upper end surface of the mounting frame.

[0008] Preferably, the positioning mold mechanism includes a support seat fixedly arranged inside the second processing chamber, a positioning plate fixedly arranged on the outer wall of the support seat, the outer edge of the front end of the positioning plate is arranged in an arc surface, an arc-shaped base is rotatably installed inside the first processing chamber through an assembly rod, a valve seat mold is arranged on the inner surface of the arc-shaped base, an arc-shaped clamping block is fixedly installed in the middle of the arc-shaped base, the outer surface of the arc-shaped clamping block is abutted against the side surface of the valve seat mold, and rotating clamping mold assemblies are arranged on both sides of the upper end of the positioning plate.

[0009] Preferably, the rotating clamping mold assembly includes a guide rod fixedly arranged on one side of the upper end surface of the positioning plate, a rotating arm is rotatably installed on the outer side of the guide rod, a sliding rod is slidably installed inside the rotating arm and at one end away from the guide rod, a clamping arm is fixedly arranged on the bottom end of the sliding rod, a stop bead is rotatably arranged on the top wall of the clamping arm and corresponding to the bottom of the sliding rod, the stop bead abuts against the outer edge of the valve seat mold, a spring is mounted on the outside of the sliding rod and close to the upper part of the clamping arm, a bayonet is movably inserted into the upper end of the rotating arm and close to the guide rod, and the lower end of the bayonet extends movably to the inside of the positioning plate.

[0010] Preferably, a cylinder is rotatably installed inside the clamping arm, and a stabilizing ball is installed at the telescopic end of the cylinder, and the stabilizing ball movably contacts the inner surface of the valve seat mold.

[0011] Preferably, clamping columns are installed on both sides of the outer wall of the vertical frame, and clamping shafts are fixedly installed on both sides of the inner wall of the first processing chamber and near the rear end. The outsides of the two clamping shafts are commonly connected to pads through rotatable rotating sleeves, and connecting columns are fixedly installed on both sides of the end of the pad away from the rotating sleeve. The outer sides of the two connecting columns are movably connected to the clamping columns at corresponding positions through corresponding hanging ropes and hanging rings at the ends of the hanging ropes.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Through the translation drive mechanism and vertical drive mechanism, the U-shaped seat can be driven to rise and fall and translate at one end of the frame, so as to cooperate with the double-pass particle spraying pipe to spray and polish the inner surface of the valve seat mold.

[0014] 2. The transmission mechanism can drive the double-pass particle spraying tube to move horizontally, thereby enabling the double-pass particle spraying tube to spray abrasives evenly and improve the polishing effect of the valve seat mold. In addition, the double-pass particle spraying tube can be rotated under the drive of the second motor to adapt to the T-shaped section of the valve seat mold.

[0015] 3. The positioning mold mechanism can fully adapt to the valve seat mold. When polishing the front side, the arc-shaped block and the positioning plate can stably support the valve seat mold, so that the T-shaped section is parallel to the two-way particle spraying tube. When the two-way particle spraying tube moves horizontally, the T-shaped section is sprayed and polished to the maximum extent. Then the rotating arm at the positioning plate is rotated to rotate the cylinder and the stabilizing ball to the T-shaped section. Under the contact between the cylinder and the stabilizing ball, the arc-shaped base is caused to swing left and right adaptively inside the positioning plate. Therefore, the two-way particle spraying tube can spray the inner curved surface of the valve seat mold in all directions to ensure uniformity.

[0016] 4. By setting up the vertical frame, hanging rope, scraper ring, connecting column, clamping column, clamping shaft, rotating sleeve and pad skin, after polishing, the hanging rope and scraper ring can be hung on the outside of the clamping column on both sides of the vertical frame. When the vertical frame is lifted, the abrasive on the surface of the pad skin can be lifted up, so that the abrasive in the first processing chamber can be poured into the second processing chamber at the rear end for collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall connection structure of the present invention from another angle;

[0019] Figure 3 This is a schematic diagram of the inner connection structure of the first processing chamber of the present invention;

[0020] Figure 4 It is a schematic diagram of the connection structure between the support seat and the positioning plate of the present invention;

[0021] Figure 5 It is a schematic diagram of the partial structural connection between the mounting frame and the double-pass particle injection pipe of the present invention;

[0022] Figure 6 It is a schematic diagram of the connection structure between the rack and the gear of the present invention;

[0023] Figure 7 It is a schematic diagram of the connection structure between the cushion skin and the first processing chamber of the present invention;

[0024] Figure 8 It is a schematic diagram of the connection structure between the positioning plate and the rotating arm and the clamping arm of the present invention;

[0025] Fig. 9 For the present invention Figure 7 A schematic diagram of the enlarged structure in the middle.

[0026] In the figure: 1, machine base; 2, frame; 3, translation drive mechanism; 4, vertical drive mechanism; 5, mounting seat; 6, No. 1 motor; 7, U-shaped seat; 8, synchronous wheel assembly; 9, screw rod; 10, mounting frame; 11, first processing chamber; 12, second processing chamber; 13, support seat; 14, positioning plate; 15, valve seat mold; 16, rotating arm; 17, clamping arm; 18, connecting column; 19, arc clamping block; 20, hanging rope; 21, Arc-shaped base; 22, assembly rod; 23, rotating shaft; 24, pad; 25, hanging ring; 26, vertical frame; 27, grain feeding pipe; 28, clamping column; 29, double-pass grain spraying pipe; 30, gear; 31, push cylinder; 32, No. 2 motor; 33, rack; 34, L-shaped frame; 35, sliding rod; 36, latch; 37, clamping shaft; 38, stabilizing ball; 39, cylinder; 40, rotating sleeve; 41, spring; 42, stop bead; 43, guide rod. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] like Figure 1-Figure 9 The mold hole wall polishing device shown includes a machine base 1 and a frame 2 installed on the upper end surface of the machine base 1, a translation driving mechanism 3 is installed on the upper end of the frame 2, a vertical driving mechanism 4 is installed horizontally and slidably outside the translation driving mechanism 3, a mounting seat 5 is installed vertically and slidably outside the vertical driving mechanism 4, a U-shaped seat 7 is arranged on the outer surface of the mounting seat 5, a mounting frame 10 is connected to the inside of the U-shaped seat 7 through a transmission mechanism, the upper end of the mounting frame 10 is slidably connected to the inner top wall of the U-shaped seat 7, a particle spraying polishing mechanism is arranged inside the mounting frame 10, a first processing chamber 11 is fixedly installed on the upper end surface of the machine base 1 and on one side away from the frame 2, a second processing chamber 12 is installed inside the first processing chamber 11 at the rear end thereof, and a positioning mold mechanism is arranged inside the second processing chamber 12;

[0030] The translation drive mechanism 3 and the vertical drive mechanism 4 are both composed of a drive motor group, a slide rail group, a guide block group, and a screw group. They are common machine tool moving mechanisms and will not be described in detail.

[0031] The transmission mechanism includes a No. 1 motor 6 fixedly mounted on one side of the outer wall of the U-shaped seat 7, the output shaft of the No. 1 motor 6 is connected to a screw rod 9 via a synchronous wheel assembly 8, the screw rod 9 is rotationally matched with the U-shaped seat 7, and the mounting frame 10 is threadedly matched with the screw rod 9;

[0032] Driven by the No. 1 motor 6 and the synchronous wheel assembly 8, the screw rod 9 can drive the external mounting frame 10 to move to meet subsequent use.

[0033] The particle spraying and polishing mechanism includes a rotating shaft 23 rotatably installed inside the mounting frame 10, a gear 30 is arranged on the upper end of the rotating shaft 23, a vertical frame 26 is fixedly mounted on the lower outer side of the rotating shaft 23, the vertical frame 26 is rotatably installed inside the lower part of the mounting frame 10, a No. 2 motor 32 is fixedly installed on one side of the outer wall of the vertical frame 26, the output shaft of the No. 2 motor 32 is connected to a double-pass particle spraying pipe 29 through a set transmission shaft, a particle feeding pipe 27 is installed at the lower part of the double-pass particle spraying pipe 29, and a swing mechanism is arranged above the mounting frame 10.

[0034] The swing mechanism includes an L-shaped frame 34 fixedly arranged on one side above the mounting frame 10, a push cylinder 31 is installed inside the L-shaped frame 34, a rack 33 is fixedly installed at the telescopic end of the push cylinder 31, the rack 33 is meshed with the gear 30, and the bottom of the rack 33 is slidably matched with the upper end surface of the mounting frame 10;

[0035] Under the extension and retraction drive of the push cylinder 31, the rack 33 meshes with the gear 30, so that the rotating shaft 23 can rotate, and the corresponding vertical frame 26 can drive the double-pass particle spraying pipe 29 at the front end to rotate along the vertical axis, and the spraying method can be swinging;

[0036] An electric control valve is arranged inside the double-pass particle injection pipe 29 to control the discharge of materials from the two passages.

[0037] The positioning mold mechanism includes a support seat 13 fixedly arranged inside the second processing chamber 12, a positioning plate 14 is fixedly arranged on the outer wall of the support seat 13, and the outer edge of the front end of the positioning plate 14 is arranged in an arc surface. An arc-shaped base 21 is rotatably installed inside the first processing chamber 11 through an assembly rod 22, and a valve seat mold 15 is arranged on the inner surface of the arc-shaped base 21. An arc-shaped clamping block 19 is fixedly installed in the middle of the arc-shaped base 21, and the outer surface of the arc-shaped clamping block 19 is against the side surface of the valve seat mold 15. Rotating clamping mold components are arranged on both sides of the upper end of the positioning plate 14;

[0038] The rotating clamping mold assembly includes a guide rod 43 fixedly arranged on one side of the upper end surface of the positioning plate 14, a rotating arm 16 is rotatably installed on the outer side of the guide rod 43, a sliding rod 35 is slidably installed on the inner side of the rotating arm 16 and away from the guide rod 43, a clamping arm 17 is fixedly arranged on the bottom end of the sliding rod 35, a stopper 42 is rotatably arranged on the top wall of the clamping arm 17 and corresponding to the lower side of the sliding rod 35, the stopper 42 is abutted against the outer edge of the valve seat mold 15, a spring 41 is sleeved on the outer side of the sliding rod 35 and close to the upper side of the clamping arm 17, a clamping pin 36 is movably inserted on the upper end of the rotating arm 16 and close to the guide rod 43, and the lower end of the clamping pin 36 is movably extended to the inside of the positioning plate 14;

[0039] The arc surface of the front edge of the positioning plate 14 is used to support the rear end surface of the valve seat mold 15, and the front end surface of the valve seat mold 15 is fixed to the valve seat mold 15 by a method in which the arc-shaped clamping block 19 is abutted against the valve seat mold 15. This method is more convenient for clamping the valve seat and will not affect the polishing area during processing;

[0040] The inner surface of the positioning plate 14 is provided with a wear-resistant material. When the inner surface of the valve seat mold 15 is sprayed in parallel, the two ends of the valve seat mold 15 will not rotate easily due to the positioning of the beads 42. Only when the cylinder 39 is pressed by mechanical force, the valve seat mold 15 can swing inside the positioning plate 14.

[0041] The setting of the rotating arm 16 and the clamping arm 17 can assist in positioning the valve seat mold 15. When the two-way particle injection tube 29 is sprayed parallel to the valve seat mold 15, the rotating arm 16 can be rotated to the oblique front of one end of the valve seat mold 15. When the clamping arm 17 passes over the valve seat mold 15, the stop bead 42 abuts against the outer edge of the valve seat mold 15. At this time, the slide rod 35, under the pressure of the spring 41, prompts the stop bead 42 to press and support at both ends of the valve seat mold 15, so as to ensure that the valve seat mold 15 will not shift during spraying.

[0042] A cylinder 39 is rotatably mounted inside the clamp arm 17, and a stabilizing ball 38 is mounted at the telescopic end of the cylinder 39, and the stabilizing ball 38 movably abuts against the inner surface of the valve seat mold 15;

[0043] The cylinder 39 can drive the stabilizing ball 38 to abut against the inner surface of the valve seat mold 15, thereby driving the valve seat mold 15 to rotate by means of telescopic pressure.

[0044] Clamping columns 28 are installed on both sides of the outer wall of the vertical frame 26, and clamping shafts 37 are fixedly installed on both sides of the inner wall of the first processing chamber 11 and near the rear end. The outsides of the two clamping shafts 37 are connected to the pad 24 through a rotatable rotating sleeve 40. The pad 24 is fixedly installed on both sides of the end away from the rotating sleeve 40. The outer sides of the two connecting columns 18 are movably connected to the clamping columns 28 at the corresponding positions through the corresponding hanging ropes 20 and the hanging rings 25 at the ends of the hanging ropes 20.

[0045] The hanging rope 20 on the outside of the connecting column 18 is hung on the outside of the clamping column 28 through the hanging ring 25 at the end, and the vertical driving mechanism 4 drives the mounting frame 10 to move upward, and the pad skin 24 is tilted and stretched to one end at this time, which helps to guide the abrasive particles on the inner plane of the first processing chamber 11 to fall into the second processing chamber 12 for collection. The end of the pad skin 24 away from the connecting column 18 is connected by the rotation of the rotating sleeve 40, and the pad skin 24 can be spread flat inside the first processing chamber 11 after shaking off the abrasive particles;

[0046] The pad skin 24 is made of a folding plate, and the hanging rope 20 is made of an elastic material.

[0047] Working principle: When the device is in use, the rear end of the valve seat mold 15 is first clamped against the outer edge of the curved surface of the positioning plate 14, and the front end section of the valve seat mold 15 is abutted against the arc-shaped clamping block 19. After the clamping is completed, the valve seat mold 15 has been relatively stably set above the arc-shaped base 21, and then the rotating arm 16 is rotated until the bead 42 at the clamping arm 17 is abutted against the outer edge of the valve seat mold 15. The spring 41 at the slide rod 35 can increase the pressing strength of the bead 42. At this time, the translation drive mechanism 3 can be started to move the vertical drive mechanism 4 and the mounting seat 5 to one end of the valve seat mold 15. Then the vertical drive mechanism 4 drives the mounting seat 5 and the U-shaped seat 7 to move downward, so that the two-way particle spraying tube 29 remains parallel to the T-shaped section of the valve seat mold 15. The two-way particle spraying tube 29 is connected to the external abrasive supply device through the particle inlet tube 27, and the two-way particle spraying tube 29 can spray abrasive on the inner surface of the valve seat mold 15 for polishing.

[0048] Driven by the No. 1 motor 6, the synchronous wheel assembly 8 drives the screw rod 9 to rotate, and the mounting frame 10 threadedly matched with the screw rod 9 moves laterally outside the screw rod 9, thereby the two-way particle spraying tube 29 can move laterally in front of the valve seat mold 15 for all-round polishing. In addition, in order to improve the polishing effect of the valve seat mold 15, after the forward injection of the T-shaped section is completed, the cylinder 39 at the rotating arm 16 is driven by its own telescopic drive to press the stabilizing ball 38 against the inner surface of the valve seat mold 15. When the cylinder 39 at one end presses the valve seat mold 15 toward the front end, the cylinder 39 at the other end contracts. At this time, under the pressure of the cylinder 39, the valve seat mold 15 can rotate at the front end of the positioning plate 14, and the corresponding two-way particle spraying tube 29 can be rotated to the side opposite to the valve seat mold 15, thereby enabling the abrasive particles to be sprayed on the side curved surface. Thus, by continuously adjusting the positions of the two-way particle spraying tube 29 and the valve seat mold 15, the inner wall of the valve seat mold 15 is automatically polished evenly;

[0049] After polishing, the valve seat mold 15 is removed, and the hanging rope 20 on the outside of the connecting column 18 is hung on the outside of the clamping column 28 through the hanging ring 25 at the end. The vertical drive mechanism 4 then drives the mounting frame 10 to move upward, and the pad 24 is tilted and stretched to one end at this time, which helps to guide the abrasive particles on the internal plane of the first processing chamber 11 to fall into the second processing chamber 12 for collection.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A die hole wall polishing device, comprising a machine base (1) and a frame (2) mounted on the upper end surface of the machine base (1), characterized in that: A translation driving mechanism (3) is installed at the upper end of the frame (2); a vertical driving mechanism (4) is installed horizontally and slidably outside the translation driving mechanism (3); a mounting seat (5) is installed vertically and slidably outside the vertical driving mechanism (4); a U-shaped seat (7) is provided on the outer surface of the mounting seat (5); a mounting frame (10) is connected to the inside of the U-shaped seat (7) through a transmission mechanism; the upper end of the mounting frame (10) is slidably connected to the inner top wall of the U-shaped seat (7); a particle spraying and polishing mechanism is provided inside the mounting frame (10); a first processing chamber (11) is fixedly installed on the upper end surface of the machine base (1) and on a side away from the frame (2); a second processing chamber (12) is installed inside the first processing chamber (11) at the rear end thereof in communication with the inside; a positioning mold mechanism is provided inside the second processing chamber (12).

2. The mold hole wall polishing device according to claim 1, characterized in that: The transmission mechanism comprises a No. 1 motor (6) fixedly mounted on one side of the outer wall of the U-shaped seat (7); the output shaft of the No. 1 motor (6) is externally connected to a screw rod (9) via a synchronous wheel assembly (8); the screw rod (9) is rotationally engaged with the U-shaped seat (7); and the mounting frame (10) is threadedly engaged with the screw rod (9).

3. The mold hole wall polishing device according to claim 1, characterized in that: The particle spraying and polishing mechanism comprises a rotating shaft (23) rotatably mounted inside a mounting frame (10), a gear (30) being arranged at the upper end of the rotating shaft (23), a vertical frame (26) being fixedly mounted on the lower outer side of the rotating shaft (23), the vertical frame (26) being rotatably mounted inside the lower inner side of the mounting frame (10), a second motor (32) being fixedly mounted on one side of the outer wall of the vertical frame (26), an output shaft of the second motor (32) being connected to a double-pass particle spraying pipe (29) via a transmission shaft, a particle feeding pipe (27) being connected and mounted inside the double-pass particle spraying pipe (29), and a swing mechanism being arranged above the mounting frame (10).

4. The mold hole wall polishing device according to claim 3, characterized in that: The swing mechanism comprises an L-shaped frame (34) fixedly arranged on one side above the mounting frame (10), a push cylinder (31) being installed inside the L-shaped frame (34), a rack (33) being fixedly installed at the telescopic end of the push cylinder (31), the rack (33) being meshed with the gear (30), and the bottom of the rack (33) being slidably matched with the upper end surface of the mounting frame (10).

5. The mold hole wall polishing device according to claim 1, characterized in that: The positioning mold mechanism comprises a support seat (13) fixedly arranged inside the second processing chamber (12), a positioning plate (14) fixedly arranged on the outer wall of the support seat (13), the outer edge of the front end of the positioning plate (14) being arranged in an arc surface, an arc-shaped base (21) rotatably installed inside the first processing chamber (11) through an assembly rod (22), a valve seat mold (15) being arranged on the inner surface of the arc-shaped base (21), an arc-shaped clamping block (19) fixedly installed in the middle of the arc-shaped base (21), the outer surface of the arc-shaped clamping block (19) being abutted against the side surface of the valve seat mold (15), and a rotating clamping mold assembly is arranged on both sides of the upper end of the positioning plate (14).

6. The mold hole wall polishing device according to claim 5, characterized in that: The rotating clamping mold assembly includes a guide rod (43) fixedly arranged on one side of the upper end surface of the positioning plate (14), a rotating arm (16) is rotatably installed on the outer side of the guide rod (43), a sliding rod (35) is slidably installed inside the rotating arm (16) and at one end away from the guide rod (43), a clamping arm (17) is fixedly arranged at the bottom end of the sliding rod (35), a stop bead (42) is rotatably arranged on the top wall of the clamping arm (17) and corresponding to the bottom of the sliding rod (35), the stop bead (42) is abutted against the outer edge of the valve seat mold (15), a spring (41) is mounted on the outside of the sliding rod (35) and close to the upper part of the clamping arm (17), a clamping pin (36) is movably inserted into the upper end of the rotating arm (16) and close to the guide rod (43), and the lower end of the clamping pin (36) is movably extended to the inside of the positioning plate (14).

7. The mold hole wall polishing device according to claim 6, characterized in that: A cylinder (39) is rotatably mounted inside the clamp arm (17), a stabilizing ball (38) is mounted at the telescopic end of the cylinder (39), and the stabilizing ball (38) is movably opposed to the inner surface of the valve seat mold (15).

8. The mold hole wall polishing device according to claim 3, characterized in that: Clamping columns (28) are installed on both sides of the outer wall of the vertical frame (26); clamping shafts (37) are fixedly installed on both sides of the inner wall of the first processing chamber (11) and near the rear end; the outsides of the two clamping shafts (37) are connected to the pad (24) through a rotatable rotating sleeve (40); connecting columns (18) are fixedly installed on both sides of the end of the pad (24) away from the rotating sleeve (40); the outer sides of the two connecting columns (18) are movably connected to the clamping columns (28) at the corresponding positions through corresponding hanging ropes (20) and hanging rings (25) at the ends of the hanging ropes (20).

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