An automated welding platform for mechanical parts to prevent slag inclusion

Abstract

The present invention relates to an automatic welding platform for preventing slag inclusion of mechanical parts, comprising a platform cylinder and also comprising: an annular electric slide rail installed on the top of the platform cylinder; a multi-angle cleaning mechanism slidably connected to the top of the annular electric slide rail, the multi-angle cleaning mechanism comprising an electric slider, the bottom of the electric slider is slidably connected to the annular electric slide rail, the top of the electric slider is provided with a circular groove, and a first motor is installed inside the circular groove. The present invention can not only drive the connecting disk and the wire brush to rotate, and the wire brush can be used to play a grinding role, but also can clean the welding slag in the welding groove, and the grinding component and the cleaning component are integrated into an integrated arrangement, and the annular electric slide rail can be used to drive the connecting disk and the wire brush to move in a circular manner, so as to grind and clean different positions of the mechanical parts, and by driving the moving block to move up and down, the connecting disk and the wire brush can also be driven to move up and down, so that different positions and different heights of the mechanical parts can be ground and cleaned.

Description

Technical Field

[0001] The present invention relates to the field of welding of mechanical parts, and in particular to an automatic welding platform for mechanical parts with slag inclusion prevention. Background Art

[0002] The main reasons for slag inclusion are as follows: 1. The slag at the edge of the weld, between the weld layer and the weld bead is not cleaned up; 2. The welding current is too low, and the heat received by the molten metal and slag is insufficient, which reduces its fluidity. In addition, the molten metal solidifies quickly, and the slag does not have time to float out; 3. During welding, the welding rod angle and welding rod movement method are improper, making it difficult to distinguish between the slag and the molten iron, mixing the slag and the molten metal, and hindering the slag from floating up. Existing automated welding machines, under automated control, can basically avoid slag inclusion by adjusting the welding current, welding rod angle, and welding rod movement method. However, the slag at the edge of the weld, between the weld layer and the weld bead still needs to be cleaned manually or with equipment. Rust in the weld tank is also a significant factor affecting slag inclusion.

[0003] According to the published patent 202211209299.2, an automatic welding platform for mechanical parts to prevent slag inclusion includes a platform body, and drive slides are symmetrically opened on both sides of the platform body. A support frame is movably connected in the drive slide, and a movable frame is movably connected to the support frame. One end of the movable frame is connected to a welding assembly, and a grinding assembly and a cleaning assembly are installed on the movable frame. The present invention proposes an automatic welding platform for preventing slag inclusion in mechanical parts. A grinding component and a cleaning component are provided in the welding forward direction of the welding component. Before welding, rust and slag are ground off by the grinding component, and then the impurities ground off in the welding groove are discharged by the cleaning component, which can effectively reduce the impurities in the welding groove, thereby preventing slag inclusion during welding. In the process of realizing the present invention, the inventor found that at least the following problems in the prior art have not been solved. Although a grinding component and a cleaning component are provided in the welding forward direction of the welding component, rust and slag are ground off by the grinding component before welding, and then the impurities ground off in the welding groove are discharged by the cleaning component, which can effectively reduce the impurities in the welding groove, thereby preventing slag inclusion during welding, the cleaning work is solved. It is carried out separately from the welding work, and welding cannot be performed immediately after cleaning, which may cause the mechanical parts to rust again after cleaning. During use, the traditional mechanical parts anti-slag automatic welding platform combines welding components, grinding components and cleaning components together, but the multiple components are arranged horizontally, resulting in a larger overall volume of the components. In the process of cleaning and welding the mechanical parts, it is necessary to repeatedly move the parts horizontally to achieve the functions of welding and cleaning, which is very inconvenient. Moreover, the mechanical parts need to be preheated before welding, otherwise it is easy to cause low-temperature cracks. The existing device also needs to use an additional preheating device for preheating, which requires the transportation of the mechanical parts, which is not very convenient. For this reason, it is necessary to design a new technical solution to solve the problem. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, adapt to actual needs, and provide an automatic welding platform for mechanical parts to prevent slag inclusion, so as to solve the current traditional automatic welding platform for mechanical parts to prevent slag inclusion. Although the welding components, grinding components and cleaning components are combined together, the multiple components are arranged horizontally, resulting in a larger overall volume of the components. In the process of cleaning and welding the mechanical parts, repeated lateral movement and adjustment are required to achieve the welding and cleaning functions, which is very inconvenient. Moreover, the mechanical parts need to be preheated before welding, otherwise low-temperature cracks are easily caused. The existing device also needs to use an additional preheating device for preheating, which requires the transportation of the mechanical parts, which is not a very convenient technical problem.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is to design an automatic welding platform for preventing slag inclusion of mechanical parts, including a platform cylinder, and also including:

[0006] Annular electric slide rail, installed on the top of the platform cylinder;

[0007] A multi-angle cleaning mechanism is slidably connected to the top of the annular electric slide rail, and the multi-angle cleaning mechanism includes an electric slider, the bottom of the electric slider is slidably connected to the annular electric slide rail, a circular groove is opened on the top of the electric slider, a first motor is installed inside the circular groove, the top of the first motor is connected to the first motor shaft, a rotating disk is fixed on the top of the first motor shaft, a connecting strip is fixed on the top of the rotating disk, a fixing plate is fixed on the top of one side of the connecting strip, a second motor is installed on the top of the fixing plate, and the bottom of the second motor is connected to the second motor shaft;

[0008] The bottom of the second motor shaft passes through the fixed plate and is connected to a threaded rod, the bottom of the threaded rod passes through the moving block, and the threaded rod is threadedly connected to the screw hole in the moving block, a first electric telescopic cylinder is installed on one side of the moving block, a cleaning shell is fixed on the end of the first electric telescopic cylinder away from the moving block, a mounting hole is opened on one side of the cleaning shell, a first partition net is fixed inside the mounting hole, a third motor shaft passes through the inside of the first partition net, a connecting disk is fixed on one side of the third motor shaft, and a wire brush is fixed on the end of the connecting disk away from the third motor shaft.

[0009] Preferably, the end of the third motor shaft away from the connecting disk extends into the cleaning shell, the end of the third motor shaft located in the cleaning shell is connected to the third motor, the end of the third motor away from the third motor shaft is installed with a cleaning shell, and the end of the third motor shaft located in the cleaning shell is installed with an exhaust fan blade on the outside.

[0010] Preferably, a square hole is opened on one side of the connecting strip, and a moving block passes through the square hole, and a welding head is installed on the end of the moving block away from the first electric telescopic cylinder.

[0011] Preferably, the bottom of the threaded rod is rotatably connected to a bearing, and a rotating disk is installed at the bottom of the bearing.

[0012] Preferably, the bottom front end of the cleaning shell is rotatably connected to one end of a first hinge, and the other end of the first hinge is fixed with a baffle.

[0013] Preferably, a circular hole is opened at the top of the platform cylinder, a second partition net is inserted into the circular hole, a second electric telescopic cylinder is installed at the bottom end of the platform cylinder, and a second partition net is fixed on the top of the second electric telescopic cylinder.

[0014] Preferably, electric heating tubes are fixed to both upper and lower ends of both sides of the second electric telescopic cylinder, and a platform cylinder is fixed to one end of the electric heating tube away from the second electric telescopic cylinder.

[0015] Preferably, one side of the front end of the platform cylinder is rotatably connected to one end of a second hinge, the other end of the second hinge is fixed to a cylinder front plate, and an industrial control computer is installed at the front end of the cylinder front plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention combines an annular electric slide rail, a moving block and a wire brush, which can not only utilize a third motor to drive the connecting disc and the wire brush to rotate, but also utilize the wire brush to play a grinding role, and at the same time can also clean the welding slag in the welding groove. The grinding component and the cleaning component are integrated into one, which reduces the overall volume of the device. Moreover, by providing an annular electric slide rail, the annular electric slide rail can be used to drive the connecting disc and the wire brush to move in an annular direction, thereby grinding and cleaning different positions of mechanical parts. Since a threaded rod is also provided to drive the moving block to move up and down, it can also drive the connecting disc and the wire brush to move up and down. When used in conjunction with the annular electric slide rail, different positions and heights of mechanical parts can be ground and cleaned. It eliminates the need for repeated adjustments to the position of mechanical parts. Not only that, when mechanical parts need to be welded, only the first motor is needed to drive the connecting plate to rotate, and the welding head can be directly switched to face the mechanical parts at the same position, eliminating the need for repeated lateral adjustments to the positions of welding components, grinding components and cleaning components, and solving the problem of traditional mechanical parts anti-slag automatic welding platform. Although the welding components, grinding components and cleaning components are combined together, the horizontal arrangement of multiple components results in a larger overall volume of the components. In the process of cleaning and welding mechanical parts, repeated lateral movement and adjustment are required to realize the welding and cleaning functions, which is a very inconvenient technical problem.

[0018] 2. The present invention combines the third motor, the third motor shaft and the exhaust fan blades. During the process of the third motor driving the connecting plate and the wire brush to grind and clean, the third motor shaft will also drive the exhaust fan blades to rotate. Through the rotation of the exhaust fan blades, the dust and floating debris generated during the grinding and cleaning process can be sucked into the interior of the cleaning shell, thereby collecting the dust and debris, avoiding dust and debris floating around the working position, and no additional driving equipment is required. The adsorption mechanism and the cleaning mechanism are integrated, saving energy.

[0019] 3. The present invention combines the second partition net, the second electric telescopic cylinder and the electric heating tube, so that not only can the second partition net be used to support the mechanical parts, but also, before welding, the second electric telescopic cylinder can be used to drive the second partition net and the mechanical parts to extend into the interior of the platform cylinder. Since multiple electric heating tubes are arranged inside the platform cylinder, multiple electric heating tubes can be used to generate heat to preheat the mechanical parts on the top of the second partition net, which solves the problem that the mechanical parts need to be preheated before welding, otherwise low-temperature cracks are easily caused. The existing device also needs to use an additional preheating device for preheating, which requires the mechanical parts to be transported, which is not very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the cleaning shell structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the circular groove structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the platform cylinder of the present invention.

[0024] Figure: 1. Platform cylinder; 101. Industrial computer; 102. Second hinge; 103. Cylinder front plate; 2. Annular electric slide rail; 201. Electric slider; 202. Rotating disk; 203. Connecting strip; 204. Fixed plate; 205. Second motor; 206. Second motor shaft; 207. Moving block; 208. First electric telescopic cylinder; 209. Third motor shaft; 210. Connecting disk; 211. Wire brush ; 212, welding head; 213, threaded rod; 214, bearing; 215, first hinge; 216, baffle; 217, cleaning shell; 218, third motor; 219, first motor shaft; 220, exhaust fan blade; 221, mounting hole; 222, first partition; 223, circular groove; 224, first motor; 3, circular hole; 301, second partition; 302, second electric telescopic cylinder; 303, electric heating tube. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Example 1: An automated welding platform for preventing slag inclusion in mechanical parts, see Figures 1 to 4, including a platform cylinder 1, and also including: an annular electric slide rail 2, installed on the top of the platform cylinder 1; a multi-angle cleaning mechanism, slidably connected to the top of the annular electric slide rail 2, the multi-angle cleaning mechanism includes an electric slider 201, the bottom of the electric slider 201 is slidably connected to the annular electric slide rail 2, the top of the electric slider 201 is provided with a circular groove 223, a first motor 224 is installed inside the circular groove 223, the top of the first motor 224 is connected to a first motor shaft 219, a rotating disk 202 is fixed to the top of the first motor shaft 219, a connecting strip 203 is fixed to the top of the rotating disk 202, a fixing plate 204 is fixed to the top of one side of the connecting strip 203, a second motor 205 is installed on the top of the fixing plate 204, and the bottom of the second motor 205 is connected to the second motor shaft 206;The bottom of the second motor shaft 206 passes through the fixed plate 204 and is connected to a threaded rod 213. The bottom of the threaded rod 213 passes through the moving block 207, and the threaded rod 213 is threadedly connected to the screw hole in the moving block 207. A first electric telescopic cylinder 208 is installed on one side of the moving block 207. A cleaning shell 217 is fixed to the end of the first electric telescopic cylinder 208 away from the moving block 207. A mounting hole 221 is opened on one side of the cleaning shell 217. A first partition net 222 is fixed inside the mounting hole 221. The third motor shaft 209 is passed through the first partition net 222. A connecting disk 210 is fixed to one side of the third motor shaft 209. The end of the connecting disk 210 away from the third motor shaft 209 is fixed Wire brush 211, when it is necessary to clean and weld mechanical parts, first use the limit assembly to limit the mechanical parts at the top of the platform cylinder 1, after the limit is completed, the annular electric slide rail 2 can be opened, the annular electric slide rail 2 drives the electric slider 201, the electric slider 201 drives the connecting strip 203, the connecting disk 210 and the wire brush 211 to move, when the connecting disk 210 and the wire brush 211 are moved to the specified position, the third motor 218 is turned on, the third motor 218 drives the third motor shaft 209, the third motor shaft 209 drives the rotating disk 202, and the rotating disk 202 drives the wire brush 211 to rotate, so that grinding and butt welding are performed through the wire brush 211 The groove is cleaned. When the position of the connecting disk 210 and the wire brush 211 needs to be adjusted up and down, the second motor 205 is turned on. The second motor 205 drives the second motor shaft 206, and the second motor shaft 206 drives the threaded rod 213. The threaded rod 213 drives the moving block 207 to move up and down, and the moving block 207 drives the connecting disk 210 and the wire brush 211 to move up and down. When used in conjunction with the annular electric slide rail 2, different positions and heights of mechanical parts can be polished and cleaned, eliminating the need to repeatedly adjust the position of mechanical parts. Not only that, when mechanical parts need to be welded, the first motor 224 is turned on, and the first motor 224 drives the first The motor shaft 219, the first motor shaft 219 drives the rotating disk 202, and the rotating disk 202 drives the connecting plate to rotate, so that the welding head 212 can be directly switched to face the mechanical part at the same position, eliminating the need for repeated lateral adjustments of the positions of the welding, grinding, and cleaning components. This solves the problem of traditional slag inclusion prevention automated welding platforms for mechanical parts. Although the welding, grinding, and cleaning components are combined together, the lateral arrangement of the multiple components results in a large overall assembly volume. During the cleaning and welding process of the mechanical parts, repeated lateral movement and adjustment are required to achieve the welding and cleaning functions, which is a very inconvenient technical problem.

[0027] For details, see Figure 2, one end of the third motor shaft 209 away from the connecting disk 210 extends into the cleaning shell 217, and one end of the third motor shaft 209 located in the cleaning shell 217 is connected to the third motor 218, and the cleaning shell 217 is installed on the end of the third motor 218 away from the third motor shaft 209. An exhaust fan blade 220 is installed on the outside of one end of the third motor shaft 209 located in the cleaning shell 217. During the rotation of the third motor shaft 209, it can not only drive the connecting disk 210 and the wire brush 211 to rotate, but also drive the exhaust fan blade 220 to rotate. Through the rotation of the exhaust fan blade 220, the dust and floating debris generated in the process of grinding and cleaning can be sucked into the interior of the cleaning shell 217, thereby collecting the dust and debris, avoiding dust and debris floating around the working position, and no additional driving equipment is required. The adsorption mechanism and the cleaning mechanism are integrated to save energy.

[0028] For more details, see Figure 1 A square hole is opened on one side of the connecting strip 203, and a moving block 207 passes through the square hole. A welding head 212 is installed on the end of the moving block 207 away from the first electric telescopic cylinder 208.

[0029] For further information, see Figure 1 The bottom of the threaded rod 213 is rotatably connected to a bearing 214 , and a rotating disk 202 is installed at the bottom of the bearing 214 .

[0030] Further, see Figure 1 The bottom front end of the cleaning shell 217 is rotatably connected to one end of the first hinge 215, and the other end of the first hinge 215 is fixed with a baffle 216.

[0031] It is worth noting that, see Figure 4 A circular hole 3 is provided on the top of the platform cylinder 1, and a second partition net 301 is inserted into the circular hole 3. A second electric telescopic cylinder 302 is installed at the bottom end of the platform cylinder 1, and a second partition net 301 is fixed on the top of the second electric telescopic cylinder 302. Not only can the second partition net 301 be used to support mechanical parts, but also, before welding, the second electric telescopic cylinder 302 can be opened to drive the second partition net 301 and mechanical parts to extend into the platform cylinder 1. Since a plurality of electric heating tubes 303 are provided inside the platform cylinder 1, the plurality of electric heating tubes 303 can be used to generate heat to preheat the mechanical parts on the top of the second partition net 301, which solves the problem that the mechanical parts need to be preheated before welding, otherwise low-temperature cracks are easily caused. The existing device also needs to use an additional preheating device for preheating, which requires the mechanical parts to be transported, which is not a very convenient technical problem.

[0032] It is worth noting that see Figure 4Electric heating pipes 303 are fixed on both upper and lower ends of both sides of the second electric telescopic cylinder 302 , and the platform cylinder 1 is fixed on one end of the electric heating pipe 303 away from the second electric telescopic cylinder 302 .

[0033] It is worth mentioning that see Figure 1 One end of the second hinge 102 is rotatably connected to one side of the front end of the platform cylinder 1, and the other end of the second hinge 102 is fixed to the cylinder front plate 103, and the industrial control computer 101 is installed at the front end of the cylinder front plate 103.

[0034] When using an automatic welding platform for preventing slag inclusion of mechanical parts, the mechanical parts are first limited to the top of the platform cylinder 1 by using a limiting component. After the limiting is completed, the annular electric slide rail 2 can be opened, and the annular electric slide rail 2 drives the electric slider 201, and the electric slider 201 drives the connecting strip 203, the connecting disk 210 and the wire brush 211 to move. When the connecting disk 210 and the wire brush 211 are moved to the specified position, the third motor 218 is turned on, the third motor 218 drives the third motor shaft 209, the third motor shaft 209 drives the rotating disk 202, and the rotating disk 202 drives the wire brush 211 to rotate. Thus, the wire brush 211 is used to grind and clean the welding groove. When the position of the connecting plate 210 and the wire brush 211 needs to be adjusted up and down, the second motor 205 is turned on, and the second motor 205 drives the second motor shaft 206. The second motor shaft 206 drives the threaded rod 213. The threaded rod 213 drives the moving block 207 to move up and down, and the moving block 207 drives the connecting plate 210 and the wire brush 211 to move up and down. When used in conjunction with the annular electric slide rail 2, different positions and different heights of mechanical parts can be ground and cleaned, eliminating the need to repeatedly adjust the position of the mechanical parts. Not only In this way, when it is necessary to weld mechanical parts, the first motor 224 is turned on, the first motor 224 drives the first motor shaft 219, the first motor shaft 219 drives the rotating disk 202, and the rotating disk 202 drives the connecting plate to rotate, so that the welding head 212 can be directly switched to face the mechanical parts at the same position, eliminating the need to repeatedly adjust the positions of the welding assembly, the grinding assembly and the cleaning assembly horizontally. During the rotation of the third motor shaft 209, it can not only drive the connecting disk 210 and the wire brush 211 to rotate, but also drive the exhaust fan blades 220 to rotate. After the exhaust fan blades 220 rotate, it can be used for grinding and cleaning. During the process, the generated dust and floating debris are sucked into the cleaning shell 217, so as to collect the dust and debris, and prevent the dust and debris from floating around the working position. There is no need to set up additional driving equipment. The adsorption mechanism and the cleaning mechanism are integrated into one, which saves energy. Before welding, the second electric telescopic cylinder 302 can be opened to drive the second partition net 301 and mechanical parts to extend into the platform cylinder 1. Since a plurality of electric heating tubes 303 are arranged inside the platform cylinder 1, the plurality of electric heating tubes 303 can be used to generate heat to preheat the mechanical parts on the top of the second partition net 301.

[0035] In addition, the components designed in the present invention are all universal standard parts or components known to those skilled in the art. Their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods. They can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to internal structures and methods.

[0036] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An automatic welding platform for preventing slag inclusion in mechanical parts, comprising a platform cylinder (1), characterized in that: Also includes: An annular electric slide rail (2) is installed on the top of the platform cylinder (1); A multi-angle cleaning mechanism is slidably connected to the top of the annular electric slide rail (2), the multi-angle cleaning mechanism comprises an electric slider (201), the bottom of the electric slider (201) is slidably connected to the annular electric slide rail (2), a circular groove (223) is provided on the top of the electric slider (201), a first motor (224) is installed inside the circular groove (223), a first motor (224) is connected to the top of the first motor (224), a rotating disk (202) is fixed to the top of the first motor shaft (219), a connecting strip (203) is fixed to the top of the rotating disk (202), a fixing plate (204) is fixed to the top of one side of the connecting strip (203), a second motor (205) is installed on the top of the fixing plate (204), and a second motor (205) is connected to the bottom of the second motor (205) with a second motor shaft (206); The bottom of the second motor shaft (206) passes through the fixed plate (204) and is connected to a threaded rod (213). The bottom of the threaded rod (213) passes through the moving block (207), and the threaded rod (213) is threadedly connected to the screw hole in the moving block (207). A first electric telescopic cylinder (208) is installed on one side of the moving block (207). A cleaning shell (217) is fixed on one end of the first electric telescopic cylinder (208) away from the moving block (207). A mounting hole (221) is opened on one side of the cleaning shell (217). A first partition net (222) is fixed inside the mounting hole (221). A third motor shaft (209) is passed through the inside of the first partition net (222). A connecting disk (210) is fixed on one side of the third motor shaft (209). A wire brush (211) is fixed on one end of the connecting disk (210) away from the third motor shaft (209).

2. The slag inclusion prevention automatic welding platform for mechanical parts according to claim 1, characterized in that: One end of the third motor shaft (209) away from the connecting disk (210) extends into the cleaning shell (217); one end of the third motor shaft (209) located in the cleaning shell (217) is connected to the third motor (218); one end of the third motor (218) away from the third motor shaft (209) is installed with the cleaning shell (217); and an exhaust fan blade (220) is installed outside the end of the third motor shaft (209) located in the cleaning shell (217).

3. The slag inclusion prevention automatic welding platform for mechanical parts according to claim 1, characterized in that: A square hole is provided on one side of the connecting strip plate (203), and a moving block (207) is passed through the inside of the square hole. A welding head (212) is installed at one end of the moving block (207) away from the first electric telescopic cylinder (208).

4. The slag inclusion prevention automatic welding platform for mechanical parts according to claim 1, characterized in that: The bottom of the threaded rod (213) is rotatably connected to a bearing (214), and a rotating disk (202) is installed at the bottom of the bearing (214).

5. The slag inclusion prevention automatic welding platform for mechanical parts according to claim 1, characterized in that: The bottom of the front end of the cleaning shell (217) is rotatably connected to one end of a first hinge (215), and the other end of the first hinge (215) is fixed with a baffle (216).

6. The slag inclusion prevention automatic welding platform for mechanical parts according to claim 1, characterized in that: A circular hole (3) is provided on the top of the platform cylinder (1), a second partition net (301) is inserted into the circular hole (3), a second electric telescopic cylinder (302) is installed at the bottom end of the platform cylinder (1), and a second partition net (301) is fixed on the top of the second electric telescopic cylinder (302).

7. The slag inclusion prevention automatic welding platform for mechanical parts according to claim 6, characterized in that: Electric heating pipes (303) are fixed at both upper and lower ends of both sides of the second electric telescopic cylinder (302), and a platform cylinder (1) is fixed at one end of the electric heating pipe (303) away from the second electric telescopic cylinder (302).

8. The slag inclusion prevention automatic welding platform for mechanical parts according to claim 1, characterized in that: One end of a second hinge (102) is rotatably connected to one side of the front end of the platform cylinder (1), and the other end of the second hinge (102) is fixed with a cylinder front plate (103), and an industrial control computer (101) is installed at the front end of the cylinder front plate (103).

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