A multi-station machine tool for flange processing

Abstract

The invention discloses a multi-station machine tool for flange processing, which relates to the technical field of flange processing, including a processing machine tool and a positioning device, wherein a placement frame is fixedly installed on the top of the processing machine tool, a servo motor is fixedly installed on the left side of the placement frame, a lead screw is fixedly installed on the output end of the servo motor, a placement block is threadedly installed on the circumferential surface of the lead screw, a processing device is arranged on the rear side of the placement block, a positioning groove is opened on the top of the processing machine tool, and the bottom of the placement block is slidably connected to the processing machine tool, wherein the positioning device comprises an electric push rod, a fastening plate, a positioning hole, a positioning rod, a positioning plate, a linkage groove and a support rod, the positioning plate is subjected to the reaction force of squeezing the flange and moves in a direction away from the linkage plate, and the centering positioning helps to ensure that the flange is subjected to uniform force during the processing, thereby improving the versatility and processing efficiency of the flange positioning.

Description

Technical Field

[0001] The invention relates to the technical field of flange processing, in particular to a multi-station machine tool for flange processing. Background Art

[0002] The multi-station machine tools used for flange processing usually consist of machine tools, control equipment, clamping equipment and protective equipment.

[0003] The patent with the patent announcement number CN221389937U relates to a vertical flange processing machine tool, including a base, a mounting seat, a limit shaft, a rectangular plate, a slider, a slide, a clamping block, a transmission mechanism, a slide plate, a connecting shaft, a crank, a transmission shaft, a support plate, a moving mechanism, a cylinder 1, a push plate, a limit rod, a supporting side plate, a top plate, a cylinder 2, a lifting seat, a fixed seat, a motor, a supporting shaft, a gear plate, a rotating shaft, a rotating mechanism, a gear, a limit sleeve, a plug seat, a drill bit and a slide rod, wherein the top middle of the base is fixedly connected with a mounting seat, the top middle of the mounting seat is fixedly connected with a limit shaft, the lower end of the limit shaft is rotatably connected with a rectangular plate, and the rectangular plate is located at the upper end of the mounting seat. Compared with the prior art, the advantages of this patent are: the flange is more stable and convenient to clamp, and multiple holes can be drilled on the flange at the same time, and the drilling efficiency is higher.

[0004] In the above patent, the drilling efficiency is higher by quickly clamping the flange and drilling multiple holes on the flange at the same time. However, it is difficult to center flanges of different diameters. If it is difficult to accurately center flanges of different diameters, the difference between each workpiece will increase, thereby increasing the proportion of defective products and causing higher rework or scrap costs. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a multi-station machine tool for flange processing, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A multi-station machine tool for flange processing, comprising a processing machine tool and a positioning device, wherein a placement frame is fixedly installed on the top of the processing machine tool, a servo motor is fixedly installed on the left side of the placement frame, a lead screw is fixedly installed on the output end of the servo motor, a placement block is threadedly installed on the circumferential surface of the lead screw, a processing device is arranged on the rear side of the placement block, a positioning groove is opened on the top of the processing machine tool, and the bottom of the placement block is slidably connected to the processing machine tool, wherein the positioning device comprises an electric push rod, a fastening plate, a positioning hole, a positioning rod, a positioning plate, a linkage groove and a support rod, the positioning plate is subjected to the reaction force of squeezing the flange plate and moves in a direction away from the linkage plate, the electric push rod is fixedly passed through the rear side of the processing machine tool, the fastening plate is fixedly installed at the output end of the electric push rod, the positioning hole is opened on the front side of the fastening plate, the positioning rod is fixedly installed on the inner wall of the positioning hole, the positioning plate is slidably installed on the circumferential surface of the positioning rod, the linkage groove is opened on the front side of the fastening plate, the support rod slides through the rear side of the processing machine tool, and a No. 1 spring is arranged between the positioning plate and the positioning hole.

[0007] According to the above technical solution, a linkage plate is fixedly installed on the inner wall of the linkage groove, the front side of the support rod is fixedly connected to the fastening plate, and the side of the linkage plate close to the placement frame is set as an arc surface.

[0008] According to the above technical solution, a load-bearing plate is fixedly installed on the front side of the placement frame, a U-shaped frame is fixedly installed on the top of the processing machine tool, the positioning plate contacts the inner wall of the positioning hole, and the positioning plate moves away from the linkage plate under the reaction force of the extrusion flange.

[0009] According to the above technical solution, an auxiliary device is provided on the top of the processing machine tool to prevent the flange from being displaced, and a protective device is provided on the top of the processing machine tool. The auxiliary device includes a load-bearing rod, an L-shaped plate, a load-bearing hole, a stabilizing plate, a pressing plate and a U-shaped plate. The L-shaped plate moves downward to drive the pressing plate to move downward, and the pressing plate moves downward to contact the top of the flange and squeezes and supports the top of the flange. The load-bearing rod is fixedly installed on the top of the load-bearing plate, and the L-shaped plate is slidably installed on the circumferential surface of the load-bearing rod. The load-bearing hole is opened on the front side of the L-shaped plate, the stabilizing plate is fixedly installed on the inner wall of the load-bearing hole, the pressing plate is fixedly installed on the bottom of the L-shaped plate, and the U-shaped plate is fixedly installed on the circumferential surface of the load-bearing rod.

[0010] According to the above technical solution, a No. 2 spring is arranged between the L-shaped plate and the load-bearing plate, and the No. 2 spring can drive the L-shaped plate to reset, the U-shaped plate contacts the L-shaped plate, and the L-shaped plate passes through the top of the load-bearing plate.

[0011] According to the above technical scheme, the protection device includes a protection frame, a protection plate, a T-shaped rod, a limit frame, a limit plate, an elastic telescopic block and a limit groove. The elastic telescopic block moves downward to contact the limit groove and limit the output end of the electric push rod. The protection frame is fixedly installed on the top of the pressing plate, the protection plate is slidably installed on the inner wall of the protection frame, the T-shaped rod is fixedly installed on the bottom of the protection plate, the limit frame is fixedly passed through the inner and outer walls of the U-shaped frame, the limit plate is slidably installed on the inner wall of the limit frame, the elastic telescopic block is fixedly installed on the bottom of the limit plate, the limit groove is opened at the output end of the electric push rod, and a hose is arranged between the protection frame and the limit frame. After the processing is completed, the free end of the elastic telescopic block is manually pushed upward to release the contact between the free end of the elastic telescopic block and the limit groove, and the free end of the elastic telescopic block contacts the limit groove and releases the limit on the output end of the electric push rod.

[0012] According to the above technical solution, a No. 3 spring is arranged between the T-shaped rod and the pressing plate, and the No. 3 spring can drive the T-shaped rod to reset. The T-shaped rod passes through the bottom of the protective frame and the upper and lower walls of the pressing plate.

[0013] According to the above technical solution, liquid is set inside the protection frame, liquid is set inside the limit frame, the bottom of the free end of the elastic telescopic block is set as an inclined surface, and the limit plate moves downward due to the squeezing of the liquid entering the limit frame.

[0014] The present invention provides a multi-station machine tool for flange processing, which has the following beneficial effects: (1) The multi-station machine tool for flange processing uses a positioning plate and a No. 1 spring to squeeze the flange for centering. Centering helps to ensure that the flange is evenly stressed during processing and avoids deformation or tilting due to position offset, thereby improving the versatility of flange positioning and processing efficiency. The movement of the fastening plate drives the support rod to move, and the movement of the support rod continuously provides auxiliary support for the fastening plate. The support rod can provide additional support force for the fastening plate, reducing slight deformation of the fastening plate during positioning, thereby improving the positioning accuracy of the flange.

[0015] (2) The multi-station machine tool for flange processing drives the pressing plate to move downward by moving the L-shaped plate downward. The pressing plate moves downward to contact the top of the flange and squeezes and supports the top of the flange. By squeezing the top of the flange, the position deviation caused by cutting force or vibration during the processing can be reduced, further ensuring that each flange maintains a consistent position, thereby improving the accuracy and consistency of the entire processing process. The L-shaped plate moves upward to hit the U-shaped plate to generate vibration. The vibration of the L-shaped plate drives the pressing plate to resonate together. The vibration of the pressing plate can remove the processing waste at the bottom of the pressing plate, thereby improving the fit between the pressing surfaces, making the pressing more effective, and further avoiding uneven pressing caused by the uneven bottom of the pressing plate.

[0016] (3) The multi-station machine tool for flange processing moves downward through the limit plate squeezed by the liquid entering the limit frame. The limit plate moves downward, driving the elastic telescopic block to move downward. The elastic telescopic block moves downward and contacts the limit groove to limit the output end of the electric push rod. Through the limiting effect of the elastic telescopic block, the clamping force of the fastening plate can be effectively controlled to prevent the flange from being deformed or damaged due to excessive clamping force, thereby improving the processing accuracy of the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the position structure of the processing machine tool and the placement frame of the present invention; Figure 3 This is a schematic diagram of the position structure of the electric push rod and the fastening plate of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement of part A; Figure 5 This is a schematic diagram of the positioning hole and the positioning rod position structure of the present invention; Figure 6 It is a schematic diagram of the position structure of the load-bearing rod and the U-shaped plate of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of part B.

[0018] In the figure: 1. processing machine tool; 2. placement frame; 3. servo motor; 4. lead screw; 5. placement block; 6. processing equipment; 7. positioning groove; 8. electric push rod; 9. fastening plate; 10. positioning hole; 11. positioning rod; 12. positioning plate; 13. linkage groove; 14. support rod; 141. linkage plate; 151. load-bearing plate; 152. load-bearing rod; 153. L-shaped plate; 154. load-bearing hole; 155. stabilizing plate; 156. pressing plate; 157. U-shaped plate; 161. protective frame; 162. protective plate; 163. T-shaped rod; 164. limit frame; 165. limit plate; 166. elastic telescopic block; 167. limit groove; 168. U-shaped frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 6 , one embodiment of the present invention is: a multi-station machine tool for flange processing, comprising a processing machine tool 1, and also comprising a positioning device, wherein a placement frame 2 is fixedly installed on the top of the processing machine tool 1, a servo motor 3 is fixedly installed on the left side of the placement frame 2, a screw rod 4 is fixedly installed on the output end of the servo motor 3, a placement block 5 is threadedly installed on the circumferential surface of the screw rod 4, a processing device 6 is arranged on the rear side of the placement block 5, a positioning groove 7 is opened on the top of the processing machine tool 1, and the bottom of the placement block 5 is slidably connected to the processing machine tool 1, wherein the positioning device comprises an electric push rod 8, a fastening plate 9, a positioning hole 10, a positioning rod 11, a positioning plate 12, a linkage groove 13 and a support rod 1 4. The electric push rod 8 is fixedly passed through the rear side of the processing machine tool 1, the fastening plate 9 is fixedly installed at the output end of the electric push rod 8, the positioning hole 10 is opened on the front side of the fastening plate 9, the positioning rod 11 is fixedly installed on the inner wall of the positioning hole 10, the positioning plate 12 is slidably installed on the circumferential surface of the positioning rod 11, the linkage groove 13 is opened on the front side of the fastening plate 9, the support rod 14 slides through the rear side of the processing machine tool 1, and a No. 1 spring is arranged between the positioning plate 12 and the positioning hole 10. The centering positioning helps to ensure that the flange is evenly stressed during the processing process and avoids deformation or tilting caused by position offset, thereby improving the versatility and processing efficiency of the flange positioning.

[0021] A linkage plate 141 is fixedly installed on the inner wall of the linkage groove 13, and the front side of the support rod 14 is fixedly connected to the fastening plate 9. The side of the linkage plate 141 close to the placement frame 2 is set as an arc surface. The support rod 14 can provide additional supporting force for the fastening plate 9, reduce the slight deformation of the fastening plate 9 during the positioning process, and thus the fastening plate 9 improves the positioning accuracy of the flange.

[0022] A load-bearing plate 151 is fixedly installed on the front side of the placement frame 2, a U-shaped frame 168 is fixedly installed on the top of the processing machine tool 1, and the positioning plate 12 contacts the inner wall of the positioning hole 10. The positioning plate 12 moves away from the linkage plate 141 under the reaction force of the extrusion flange.

[0023] When this embodiment is working: after the flange to be processed is placed into the positioning groove 7, the electric push rod 8 is started to drive the fastening plate 9 to move in the direction close to the placement frame 2, the fastening plate 9 moves in the direction close to the placement frame 2 to contact the flange to be processed and squeeze the flange to fix it, and at the same time, the fastening plate 9 moves in the direction close to the placement frame 2 to drive the positioning rod 11 to move, the positioning rod 11 moves in the direction close to the placement frame 2 to drive the positioning plate 12 to move, the positioning plate 12 moves in the direction close to the placement frame 2 to contact the flange to be processed and squeeze the flange to be processed, the positioning plate 12 is subjected to the reaction force of squeezing the flange and moves in the direction away from the linkage plate 141, the positioning plate 12 moves in the direction away from the linkage plate 141 to squeeze the No. 1 spring, the No. 1 spring is squeezed by the positioning plate 12 to produce deformation and accumulate force, and at the same time The positioning plate 12 cooperates with the No. 1 spring to squeeze the flange to center it, and at the same time, the fastening plate 9 moves to drive the support rod 14 to move, and the support rod 14 moves to continuously provide auxiliary support to the fastening plate 9. After the flange is centered, the servo motor 3 operates to drive the screw rod 4 to rotate, and the rotation of the screw rod 4 drives the placement block 5 to move, and the placement block 5 moves to drive the processing equipment 6 to move to process the flange. After the flange processing is completed, the electric push rod 8 operates to drive the fastening plate 9 to move and reset in the direction away from the placement frame 2, and the fastening plate 9 moves and resets to drive the positioning rod 11 to move, and the positioning rod 11 moves to drive the positioning plate 12 to move, and the positioning plate 12 moves out of contact with the flange. After the positioning plate 12 is out of contact with the flange, the positioning plate 12 moves and resets in the direction close to the linkage plate 141 under the elastic force of the No. 1 spring.

[0024] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, an auxiliary device is provided on the top of the processing machine tool 1 to prevent the flange from being displaced, and a protective device is provided on the top of the processing machine tool 1. The auxiliary device includes a load-bearing rod 152, an L-shaped plate 153, a load-bearing hole 154, a stabilizing plate 155, a pressing plate 156 and a U-shaped plate 157. The load-bearing rod 152 is fixedly mounted on the top of the load-bearing plate 151, the L-shaped plate 153 is slidably mounted on the circumferential surface of the load-bearing rod 152, the load-bearing hole 154 is provided on the front side of the L-shaped plate 153, the stabilizing plate 155 is fixedly mounted on the inner wall of the load-bearing hole 154, the pressing plate 156 is fixedly mounted on the bottom of the L-shaped plate 153, and the U-shaped plate 157 is fixedly mounted on the circumferential surface of the load-bearing rod 152. By squeezing the top of the flange, the position deviation caused by cutting force or vibration during the processing can be reduced, further ensuring that each flange maintains a consistent position.

[0025] A No. 2 spring is arranged between the L-shaped plate 153 and the load-bearing plate 151, and the No. 2 spring can drive the L-shaped plate 153 to reset, and the U-shaped plate 157 contacts the L-shaped plate 153. The L-shaped plate 153 passes through the top of the load-bearing plate 151. The processing waste at the bottom of the pressing plate 156 can be cleared by the vibration of the pressing plate 156, thereby improving the fit between the pressing surfaces and making the pressing more effective.

[0026] The protection device includes a protection frame 161, a protection plate 162, a T-shaped rod 163, a limit frame 164, a limit plate 165, an elastic telescopic block 166 and a limit groove 167. The protection frame 161 is fixedly mounted on the top of the pressing plate 156, the protection plate 162 is slidably mounted on the inner wall of the protection frame 161, the T-shaped rod 163 is fixedly mounted on the bottom of the protection plate 162, the limit frame 164 is fixedly penetrated through the inner and outer walls of the U-shaped frame 168, the limit plate 165 is slidably mounted on the inner wall of the limit frame 164, the elastic telescopic block 166 is fixedly mounted on the bottom of the limit plate 165, and the limit groove 167 is fixedly mounted on the bottom of the limit plate 165. 7 is opened at the output end of the electric push rod 8, and a hose is arranged between the protection frame 161 and the limit frame 164. Through the limiting effect of the elastic telescopic block 166, the clamping force of the fastening plate 9 can be effectively controlled to prevent the flange from being deformed or damaged due to excessive clamping force, thereby improving the processing accuracy of the flange. After the processing is completed, the free end of the elastic telescopic block 166 can be manually pushed upward to release the contact between the free end of the elastic telescopic block 166 and the limit groove 167. The contact between the free end of the elastic telescopic block 166 and the limit groove 167 releases the limit on the output end of the electric push rod 8.

[0027] A No. 3 spring is arranged between the T-shaped rod 163 and the pressing plate 156 , and the No. 3 spring can drive the T-shaped rod 163 to reset. The T-shaped rod 163 passes through the bottom of the protective frame 161 , and the T-shaped rod 163 passes through the upper and lower walls of the pressing plate 156 .

[0028] Liquid is disposed inside the protection frame 161 , liquid is disposed inside the limiting frame 164 , the bottom of the free end of the elastic telescopic block 166 is disposed as an inclined surface, and the limiting plate 165 is squeezed by the liquid entering the limiting frame 164 and moves downward.

[0029] When the present embodiment is working, the fastening plate 9 moves toward the direction close to the placement frame 2, driving the linkage plate 141 to move, the linkage plate 141 moves to contact with the stabilizing plate 155 and squeezes the stabilizing plate 155, the stabilizing plate 155 is squeezed downward by the linkage plate 141, the stabilizing plate 155 moves downward, driving the L-shaped plate 153 to move downward, the L-shaped plate 153 moves downward to squeeze the No. 2 spring, the No. 2 spring is squeezed by the L-shaped plate 153 to produce deformation and accumulate force, and at the same time the L-shaped plate 153 moves downward to drive the pressing plate 156 to move downward, the pressing plate 156 moves downward to contact with the top of the flange and squeeze the top of the flange to support After the flange processing is completed, the electric push rod 8 drives the fastening plate 9 to move and reset in the direction away from the placement frame 2. The fastening plate 9 moves in the direction away from the placement frame 2 and drives the linkage plate 141 to move. The linkage plate 141 moves and disengages from the contact with the stabilizing plate 155. After the stabilizing plate 155 is disengaged from the linkage plate 141, the L-shaped plate 153 moves upward and resets under the elastic force of the second spring. The L-shaped plate 153 moves upward and resets, driving the pressing plate 156 to move upward and reset. At the same time, the L-shaped plate 153 moves upward and hits the U-shaped plate 157 to generate vibration. The L-shaped plate 153 generates vibration and drives the pressing plate 156 to resonate together.

[0030] The L-shaped plate 153 moves downward, driving the pressing plate 156 to move downward. The pressing plate 156 moves downward, driving the protective plate 162 to move downward. The pressing plate 156 moves downward, driving the T-shaped rod 163 to move downward. The T-shaped rod 163 moves downward, contacts the top of the flange and squeezes the flange. The T-shaped rod 163 moves upward under the reaction force of squeezing the flange. The T-shaped rod 163 moves upward to squeeze the No. 3 spring. The No. 3 spring is squeezed by the T-shaped rod 163 to produce deformation and accumulate force. At the same time, the T-shaped rod 163 moves upward, driving the protective plate 162 Move upward, the protective plate 162 moves upward to squeeze the liquid inside the protective frame 161, the liquid inside the protective frame 161 is squeezed by the protective plate 162 and enters the limit frame 164 through the hose, the liquid entering the limit frame 164 squeezes the limit plate 165, the limit plate 165 is squeezed by the liquid entering the limit frame 164 and moves downward, the limit plate 165 moves downward and drives the elastic telescopic block 166 to move downward, the elastic telescopic block 166 moves downward and contacts with the limit groove 167 and limits the output end of the electric push rod 8.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-station machine tool for flange processing, comprising a processing machine tool (1), characterized in that: Also includes a positioning device; The processing machine tool (1) has a placement frame (2) fixedly mounted on the top, a servo motor (3) fixedly mounted on the left side of the placement frame (2), a lead screw (4) fixedly mounted on the output end of the servo motor (3), a placement block (5) threadedly mounted on the circumferential surface of the lead screw (4), a processing device (6) arranged at the rear side of the placement block (5), a positioning groove (7) arranged on the top of the processing machine tool (1), and a bottom of the placement block (5) slidably connected to the processing machine tool (1); The positioning device comprises an electric push rod (8), a fastening plate (9), a positioning hole (10), a positioning rod (11), a positioning plate (12), a linkage groove (13) and a support rod (14); the electric push rod (8) is fixedly inserted through the rear side of the processing machine tool (1); the fastening plate (9) is fixedly mounted on the output end of the electric push rod (8); the positioning hole (10) is provided on the front side of the fastening plate (9); the positioning rod (11) is fixedly mounted on the inner wall of the positioning hole (10); the positioning plate (12) is slidably mounted on the circumferential surface of the positioning rod (11); the linkage groove (13) is provided on the front side of the fastening plate (9); the support rod (14) is slidably inserted through the rear side of the processing machine tool (1); and a No. 1 spring is provided between the positioning plate (12) and the positioning hole (10); Wherein, an auxiliary device for preventing the flange from being displaced is arranged on the top of the processing machine tool (1), and a protective device is arranged on the top of the processing machine tool (1).

2. The multi-station machine tool for flange processing according to claim 1, characterized in that: A linkage plate (141) is fixedly mounted on the inner wall of the linkage groove (13); the front side of the support rod (14) is fixedly connected to the fastening plate (9); and a side of the linkage plate (141) close to the placement frame (2) is arranged as an arc surface.

3. The multi-station machine tool for flange processing according to claim 2, characterized in that: A load-bearing plate (151) is fixedly mounted on the front side of the placement frame (2), a U-shaped frame (168) is fixedly mounted on the top of the processing machine tool (1), and the positioning plate (12) is in contact with the inner wall of the positioning hole (10).

4. The multi-station machine tool for flange processing according to claim 3, characterized in that: The auxiliary device comprises a load-bearing rod (152), an L-shaped plate (153), a load-bearing hole (154), a stabilizing plate (155), a pressing plate (156) and a U-shaped plate (157); the load-bearing rod (152) is fixedly mounted on the top of the load-bearing plate (151); the L-shaped plate (153) is slidably mounted on the circumferential surface of the load-bearing rod (152); the load-bearing hole (154) is opened on the front side of the L-shaped plate (153); the stabilizing plate (155) is fixedly mounted on the inner wall of the load-bearing hole (154); the pressing plate (156) is fixedly mounted on the bottom of the L-shaped plate (153); and the U-shaped plate (157) is fixedly mounted on the circumferential surface of the load-bearing rod (152).

5. The multi-station machine tool for flange processing according to claim 4, characterized in that: A No. 2 spring is provided between the L-shaped plate (153) and the load-bearing plate (151), the U-shaped plate (157) is in contact with the L-shaped plate (153), and the L-shaped plate (153) passes through the top of the load-bearing plate (151).

6. The multi-station machine tool for flange processing according to claim 5, characterized in that: The protection device comprises a protection frame (161), a protection plate (162), a T-shaped rod (163), a limit frame (164), a limit plate (165), an elastic telescopic block (166) and a limit groove (167); the protection frame (161) is fixedly mounted on the top of the pressing plate (156); the protection plate (162) is slidably mounted on the inner wall of the protection frame (161); the T-shaped rod (163) is fixedly mounted on the bottom of the protection plate (162); the limit frame (164) is fixedly penetrated through the inner and outer walls of the U-shaped frame (168); the limit plate (165) is slidably mounted on the inner wall of the limit frame (164); the elastic telescopic block (166) is fixedly mounted on the bottom of the limit plate (165); the limit groove (167) is provided at the output end of the electric push rod (8); and a hose is provided between the protection frame (161) and the limit frame (164).

7. The multi-station machine tool for flange processing according to claim 6, characterized in that: A No. 3 spring is provided between the T-shaped rod (163) and the pressing plate (156); the T-shaped rod (163) passes through the bottom of the protection frame (161); and the T-shaped rod (163) passes through the upper and lower walls of the pressing plate (156).

8. The multi-station machine tool for flange processing according to claim 7, characterized in that: Liquid is provided inside the protection frame (161), liquid is provided inside the limit frame (164), and the bottom of the free end of the elastic telescopic block (166) is arranged as an inclined surface.

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