A positioning device and positioning method for a forward-moving outer gantry

Abstract

The present invention discloses a positioning device and a positioning method for a forward-moving outer gantry, specifically relating to the technical field of gantry processing. The positioning device body includes a base platform, a clamping and positioning assembly, and a long guide rail. The long guide rail is fixedly installed on the upper surface of the base platform, and the clamping and positioning assembly is fixedly installed on the long guide rail. The clamping and positioning assembly includes a clamping bottom plate, a channel steel positioning rotating body assembly, a channel steel positioning assembly, a channel steel positioning cylinder assembly, a channel steel clamping cylinder assembly, and a height initial support assembly. The lower surface of the clamping bottom plate is installed on the long guide rail through a guide rail slider. By setting the channel steel positioning cylinder assembly and the channel steel clamping cylinder assembly, the inner processing surface of the channel steel flange is used as the height positioning reference, the inner processing surface of the web is used as the width positioning reference, and the lower end of the channel steel is used as the length direction positioning reference, with high positioning accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of gantry processing, and more specifically, the present invention relates to a positioning device and a positioning method for a forward-moving outer gantry. Background Art

[0002] It is known that a forward-moving outer gantry mainly consists of a left channel steel assembly, a right channel steel assembly, a lower cross beam, a support shaft, and an upper cross beam. Among them, the length of the channel steel ranges from 1200 mm to 4900 mm, and high gantries are mainly used. The higher the gantry, the higher the product precision requirements to avoid gantry shaking.

[0003] However, in the existing technology, the forward-moving outer gantry mold uses the blank surface on the outer surface of the channel steel flange as the height positioning reference, which is applicable to the case of a large quantity, but the actual positioning accuracy is low; the corresponding clamping cylinder and the opening positioning component are both fixed types, and interference often occurs for channel steels of different lengths, and the compatibility is not strong; the opening positioning component of the gantry and the positioning structure related to the support shaft both require manual operation, the operation is cumbersome and laborious, and improvement is needed; therefore, a positioning device and a positioning method for a forward-moving outer gantry are proposed as a further improvement. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a positioning device and a positioning method for a forward-moving outer gantry to solve the problems mentioned in the above background art, and a positioning device with high positioning accuracy, strong compatibility, and high automation degree is designed.

[0005] To achieve the above object, the present invention provides the following technical solution: A positioning device for a forward-moving outer gantry, including a positioning device main body, and the positioning device main body includes: a base platform, a clamping and positioning component, and a long guide rail;

[0006] The long guide rail is fixedly installed on the upper surface of the base platform, and the clamping and positioning component is fixedly installed on the long guide rail;

[0007] The clamping and positioning component includes: a clamping bottom plate, a channel steel positioning rotating body component, a channel steel positioning component, a channel steel positioning cylinder component, a channel steel clamping cylinder component, and a height initial support component. The lower surface of the clamping bottom plate is installed on the long guide rail through a guide rail slider;

[0008] The channel steel positioning rotating body component includes: a positioning seat, a positioning rotating body, and a limit block. The positioning seat is fixedly installed in the middle of the clamping bottom plate. The bottoms of the two positioning rotating bodies are rotatably connected to the upper surface of the positioning seat. The two limit blocks are fixedly installed on both sides of the upper surface of the positioning seat. A fixed body is fixedly installed on the side surface of the positioning rotating body;

[0009] The channel steel positioning assembly includes: a positioning block, a height support block, a height positioning screw, and a spacing positioning screw. The positioning block is fixedly installed on the surface of the fixed body through a pin. The height support block is fixedly installed on the side of the positioning block away from the limit block. The limit block contacts the adjacent positioning block. The height positioning screw is installed on the height support block. The spacing positioning screw is fixedly installed on the side of the positioning block away from the positioning rotating body;

[0010] The channel steel positioning cylinder assembly, the channel steel clamping cylinder assembly, and the height initial support assembly are all fixedly installed on the upper surface of the clamping bottom plate. A connecting mechanism is provided between the channel steel positioning cylinder assembly and the positioning rotating body.

[0011] Further, the connecting mechanism includes a rotating body slider fixedly installed on the side surface of the positioning rotating body. The output end of the channel steel positioning cylinder assembly is fixedly connected with a connecting pin. The connecting pin slides in the keyways opened in the two rotating body sliders.

[0012] Further, the channel steel positioning cylinder assembly includes: a positioning cylinder bracket and a first cylinder. The positioning cylinder bracket is fixedly installed on the side of the middle part of the clamping bottom plate. The first cylinder is fixedly installed on the side of the positioning cylinder bracket away from the positioning rotating body. The output shaft of the first cylinder is fixedly connected with the connecting pin.

[0013] Further, the channel steel clamping cylinder assembly includes: clamping cylinder brackets, a second cylinder, clamping sliders, and limit guide rails. The two clamping cylinder brackets are fixedly installed at both ends of the upper surface of the clamping bottom plate. The second cylinder is fixedly installed on the side of the clamping cylinder bracket away from the positioning rotating body. The clamping slider is fixedly installed at one end of the output shaft of the second cylinder passing through the clamping cylinder bracket. The limit guide rail is fixedly installed on the upper surface of the clamping bottom plate and is located below the clamping slider. The bottom of the clamping slider slides on the limit guide rail. A pressing head is fixedly installed on the side of the clamping slider close to the positioning rotating body.

[0014] Further, the height initial support assembly includes: U-shaped support bases and rollers. The two U-shaped support bases are respectively fixedly installed on the upper surface of the clamping bottom plate and are located on both sides of the channel steel positioning cylinder assembly. Both ends of the roller are rotatably connected to the tops of the U-shaped support bases.

[0015] Further, the positioning device main body further includes: a channel steel end positioning assembly;

[0016] The channel steel end positioning assembly includes: a fixed base and a positioning plate. The fixed base is fixed on the upper surface of one end of the base platform. The positioning plate is fixedly installed on the top of the fixed base through at least two fixing pins.

[0017] Further, the positioning device main body further includes: a support shaft positioning assembly;

[0018] The support shaft positioning assembly includes: a support frame, a positioning frame, a third cylinder, and a positioning sleeve. The two support frames are fixedly installed on both sides of the base platform. The positioning frame is fixedly installed on the top of the support frame. The third cylinder is fixedly installed on the side of the positioning frame away from the channel steel support shaft. The positioning sleeve is fixedly installed at one end where the output shaft of the third cylinder passes through the positioning frame, and the positioning sleeve contacts the channel steel support shaft.

[0019] A positioning method for a forward-moving outer gantry positioning device is as follows:

[0020] Step 1: First, adjust the channel steel end positioning assembly in the positioning device main body, and select a suitable positioning plate to achieve the required channel steel end positioning dimension;

[0021] Step 2: Select a suitable channel steel positioning assembly and install it. Control the positioning rotor in the channel steel positioning cylinder assembly to rotate through the first cylinder until it fits with the limit block, and complete the adjustment of the positioning device main body;

[0022] Step 3: Lift and transport the channel steel assembly on one side of the forward-moving outer gantry to the roller of the height initial support assembly of the positioning device main body. The roller rolls to push the channel steel assembly to fit with the positioning plate of the channel steel end positioning assembly;

[0023] Step 4: After controlling the clamping slider to extend through the second cylinder of the channel steel clamping cylinder assembly, the top of the clamping slider presses against the channel steel assembly and causes it to move. The inner surface of the channel steel wing plate is lifted by the pressing force on the side of the channel steel and fits with the height positioning screw. At the same time, when it is pushed to the web surface and fits with the spacing positioning screw, the positioning and clamping of the channel steel are completed;

[0024] Step 5: Place the support shaft into the positioning sleeve of the support shaft positioning assembly, and control the positioning sleeve to extend through the third cylinder to push the support shaft to fit with the channel steel, and complete the positioning of the support shaft;

[0025] Step 6: Repeat Step 3 and Step 4 in sequence to complete the positioning of the channel steel assembly on the other side;

[0026] Step 7: Repeat Step 5 to complete the positioning of the other side of the support shaft;

[0027] Step 8: Carry the upper beam and the lower beam onto the channel steel to complete the positioning of the forward-moving outer gantry.

[0028] Further, in the eighth step: after positioning, perform demolding operation: the third cylinder retracts to complete the demolding of the support shaft positioning assembly; the second cylinder retracts to complete the demolding of the channel steel clamping cylinder assembly, and the first cylinder extends to drive the positioning rotating body to rotate by a certain angle, so that the channel steel positioning assembly is completely separated from the channel steel. At this time, the channel steel falls onto the height initial support assembly to complete the demolding.

[0029] Technical effects and advantages of the present invention:

[0030] 1. Compared with the prior art, by setting the channel steel positioning cylinder assembly and the channel steel clamping cylinder assembly, since the channel steel positioning cylinder assembly drives the rotation of the channel steel positioning rotating body assembly through the expansion and contraction of the first cylinder to replace manual rotation, the labor intensity is reduced and the efficiency is improved; while the channel steel clamping cylinder assembly drives the clamping slider to move on the limit guide rail through the expansion and contraction of the second cylinder, and then presses the channel steel tightly; the height positioning screw and the opening positioning screw of the channel steel positioning assembly are used to realize height and opening positioning; therefore, the inner processing surface of the channel steel flange is used as the height positioning reference, the inner processing surface of the web is used as the width positioning reference, and the lower end of the channel steel is used as the length direction positioning reference, with high positioning accuracy; and the air circuit controls the relevant positioning components, without manual operation, reducing the labor intensity and improving the efficiency, and different products can be positioned by changing different channel steel positioning components.

[0031] 2. Compared with the prior art, by setting the height initial support assembly, since the inner surface of the channel steel flange and the inner side of the web are selected as the positioning references, if the channel steel is directly placed on the height positioning screw when positioning and clamping the channel steel, not only the operation efficiency is low, but also only a few points of the screw support the channel steel and the center of gravity is unstable. Therefore, during work, the channel steel is first placed on the roller of the height initial support assembly, which is convenient for operation and the workpiece is stable. At this time, the height of the inner surface of the channel steel flange is 5 mm lower than the height positioning screw. The second cylinder of the channel steel clamping cylinder assembly presses the channel steel tightly to move the channel steel, so that the inner surface of the flange and the inner side of the web are attached to the channel steel positioning assembly to complete its positioning.

[0032] 3. Compared with the prior art, by setting the clamping and positioning assembly and the long guide rail, the long guide rail is used to ensure that at least four groups of clamping and positioning assemblies can move freely to avoid interference and meet the assembly requirements of different length series gantries; with strong compatibility, the four groups of clamping and positioning assemblies can all move on the track to achieve compatibility with products of different length systems.

[0033] 4. Compared with the prior art, by setting the clamping slider, since the height positions of different channel steels are different and the center deviation of the channel steel is large, when the clamping cylinder clamps the channel steel to ensure stability and no eccentricity, holes with different heights are processed on the clamping slider, and the pressing heads are placed in the holes with different heights to clamp channel steels with different heights. Description of the drawings

[0034] Figure 1Schematic diagram of the overall structure of the present invention.

[0035] Figure 2 Schematic diagram of the clamping and positioning assembly structure of the present invention.

[0036] Figure 3 Schematic diagram of the three-dimensional structure of the clamping and positioning assembly of the present invention.

[0037] Figure 4 Schematic diagram of the top view structure of the clamping and positioning assembly of the present invention.

[0038] Figure 5 Schematic diagram of the channel steel end positioning assembly structure of the present invention.

[0039] Figure 6 Schematic diagram of the support shaft positioning assembly structure of the present invention.

[0040] Figure 7 Schematic diagram of the structure of the present invention.

[0041] Figure 8 Schematic diagram of the structure of the front-moving external gantry of the main body of the positioning device of the present invention.

[0042] Reference numerals are:

[0043] 1. Main body of the positioning device;

[0044] 11. Base platform;

[0045] 12. Clamping and positioning assembly;

[0046] 121. Clamping bottom plate;

[0047] 122. Channel steel positioning rotating assembly;

[0048] 1221. Positioning seat; 1222. Positioning rotating body; 1223. Limit block; 1224. Fixed body; 1225. Rotating body slider; 1226. Connecting pin;

[0049] 123. Channel steel positioning assembly;

[0050] 1231. Positioning block; 1232. Height support block; 1233. Height positioning screw; 1234. Spacing positioning screw;

[0051] 124. Channel steel positioning cylinder assembly; 1241. Positioning cylinder bracket; 1242. First cylinder;

[0052] 125. Channel steel clamping cylinder assembly;

[0053] 1251. Clamping cylinder bracket; 1252. Second cylinder; 1253. Clamping slider; 1254. Limit guide rail; 1255. Tightening head;

[0054] 126. Height initial support assembly; 1261. U-shaped support base; 1262. Roller

[0055] 13. Long guide rail

[0056] 14. Channel steel end positioning assembly; 141. Fixed base; 142. Positioning plate

[0057] 15. Support shaft positioning assembly

[0058] 151. Support frame; 152. Positioning frame; 153. Third cylinder; 154. Positioning sleeve Specific embodiments

[0059] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0060] As shown in the attached Figure 1-8 A positioning device for a forward-moving outer gantry, comprising a positioning device main body 1, and the positioning device main body 1 includes: a base platform 11, a clamping and positioning assembly 12, and a long guide rail 13;

[0061] The long guide rail 13 is fixedly installed on the upper surface of the base platform 11, and the clamping and positioning assembly 12 is fixedly installed on the long guide rail 13;

[0062] Among them, the base platform 11 is welded by channel steel and a large flat plate into a frame structure for supporting a certain height. At the same time, the upper surface of the large flat plate is processed with relevant positioning pin holes, threaded holes, and key grooves for installing the long guide rail 13 and multiple components;

[0063] Among them, the long guide rail 13 runs through the entire length of the base platform 11. Preferably, four groups of clamping and positioning assemblies 12 are provided, so that the long guide rail 13 ensures that the four groups of clamping and positioning assemblies 12 can move freely to avoid interference and meet the assembly requirements of different length series gantries; according to the requirements of different length gantries, the position of the clamping and positioning assembly 12 is pushed by a person;

[0064] The clamping and positioning assembly 12 includes: a clamping bottom plate 121, a channel steel positioning rotating body assembly 122, a channel steel positioning assembly 123, a channel steel positioning cylinder assembly 124, a channel steel clamping cylinder assembly 125, and a height initial support assembly 126. The lower surface of the clamping bottom plate 121 is installed on the long guide rail 13 through a guide rail slider;

[0065] The channel steel positioning and rotating assembly 122 includes: a positioning seat 1221, a positioning rotating body 1222, and a limiting block 1223. The positioning seat 1221 is fixedly installed in the middle of the clamping bottom plate 121. The bottoms of the two positioning rotating bodies 1222 are rotatably connected to the upper surface of the positioning seat 1221. The two limiting blocks 1223 are fixedly installed on both sides of the upper surface of the positioning seat 1221. A fixing body 1224 is fixedly installed on the side surface of the positioning rotating body 1222;

[0066] The channel steel positioning assembly 123 includes: a positioning block 1231, a height support block 1232, a height positioning screw 1233, and a spacing positioning screw 1234. The positioning block 1231 is fixedly installed on the surface of the fixing body 1224 through a pin. The height support block 1232 is fixedly installed on the side of the positioning block 1231 away from the limiting block 1223. The limiting block 1223 is in contact with the adjacent positioning block 1231. The height positioning screw 1233 is installed on the height support block 1232. The spacing positioning screw 1234 is fixedly installed on the side of the positioning block 1231 away from the positioning rotating body 1222;

[0067] The channel steel positioning cylinder assembly 124 includes: a positioning cylinder bracket 1241 and a first cylinder 1242. The positioning cylinder bracket 1241 is fixedly installed on the side of the middle part of the clamping bottom plate 121. The first cylinder 1242 is fixedly installed on the side of the positioning cylinder bracket 1241 away from the positioning rotating body 1222. The output shaft of the first cylinder 1242 is fixedly connected to the connecting pin 1226;

[0068] A connecting mechanism is provided between the channel steel positioning cylinder assembly 124 and the positioning rotating body 1222;

[0069] The connecting mechanism includes a rotating body slider 1225 fixedly installed on the side surface of the positioning rotating body 1222. A connecting pin 1226 is fixedly connected to the output end of the channel steel positioning cylinder assembly 124. The connecting pin 1226 slides in the key grooves opened inside the two rotating body sliders 1225;

[0070] The channel steel clamping cylinder assembly 125 includes: a clamping cylinder bracket 1251, a second cylinder 1252, a clamping slider 1253, and a limiting guide rail 1254. The two clamping cylinder brackets 1251 are fixedly installed at both ends of the upper surface of the clamping bottom plate 121. The second cylinder 1252 is fixedly installed on the side of the clamping cylinder bracket 1251 away from the positioning rotating body 1222. The clamping slider 1253 is fixedly installed at one end where the output shaft of the second cylinder 1252 passes through the clamping cylinder bracket 1251. The limiting guide rail 1254 is fixedly installed on the upper surface of the clamping bottom plate 121 and is located below the clamping slider 1253. The bottom of the clamping slider 1253 slides on the limiting guide rail 1254. A pressing head 1255 is fixedly installed on the side of the clamping slider 1253 close to the positioning rotating body 1222;

[0071] The height initial support assembly 126 includes: a U-shaped support base 1261 and a roller 1262. The two U-shaped support bases 1261 are respectively fixedly installed on the upper surface of the clamping base plate 121 and on both sides of the channel steel positioning cylinder assembly 124. The two ends of the roller 1262 are rotatably connected to the top of the U-shaped support base 1261;

[0072] Among them, the upper surface of the clamping base plate 121 is machined with relevant positioning pin holes and threaded holes for installing and positioning relevant components. The lower surface of the clamping base plate 121 is machined with relevant pin holes and threaded holes for installing guide rail sliders, and then connected to the base platform 11 through the guide rail sliders;

[0073] Among them, the positioning seat 1221 is used to position relevant components. The positioning rotor 1222 of the channel steel positioning rotor assembly 122 realizes positioning and demolding avoidance through rotation angle. The limiting block 1223 realizes the limiting effect on the positioning rotor 1222 during positioning. The connecting pin 1226 drives the rotation of the positioning rotor 1222 by moving in the keyway of the rotor slider 1225;

[0074] Among them, the channel steel positioning assembly 123 is used to position the height and the opening size of the channel steel; in the case of initial positioning of the channel steel, it clamps the channel steel so that it can move upward, and then fits with the height positioning screw 1233 and the opening positioning screw 1234 of the channel steel positioning assembly 123, thereby realizing height and opening positioning;

[0075] Among them, the channel steel positioning cylinder assembly 124 drives the rotation of the channel steel positioning rotor assembly 122 through the expansion and contraction of the first cylinder 1242, replacing manual rotation, reducing labor intensity and improving efficiency;

[0076] Among them, the channel steel clamping cylinder assembly 125 drives the clamping slider 1253 to move on the limiting guide rail 1254 through the expansion and contraction of the second cylinder 1252, and then tightly clamps the channel steel;

[0077] Among them, the clamping slider 1253 has positioning holes with different heights, and the pressing head 1255 is placed in different holes to clamp channel steels with different heights;

[0078] Among them, the height initial support assembly 126 is used to support the channel steel to a height 5 mm lower than the actual required height, so as to ensure that the channel steel clamping cylinder assembly 125 can smoothly lift the channel steel;

[0079] Among them, the rotation of the roller 1262 can facilitate the rolling of the channel steel on it.

[0080] In a preferred embodiment, as shown in the appendix Figure 1-8 shown, the positioning device main body 1 further includes: a channel steel end positioning assembly 14;

[0081] The channel steel end positioning assembly 14 includes a fixed base 141 and a positioning plate 142. The fixed base 141 is fixed on the upper surface of one end of the base platform 11, and the positioning plate 142 is fixedly installed on the top of the fixed base 141 through at least two fixing pins.

[0082] Among them, the channel steel end positioning assembly 14 realizes the positioning of different dimensions in the length direction of the channel steel by replacing different positioning plates 142.

[0083] In a preferred embodiment, as shown in the appendix Figure 1-8 The positioning device main body 1 further includes a support shaft positioning assembly 15.

[0084] The support shaft positioning assembly 15 includes a support frame 151, a positioning frame 152, a third cylinder 153 and a positioning sleeve 154. Two support frames 151 are fixedly installed on both sides of the base platform 11, the positioning frame 152 is fixedly installed on the top of the support frame 151, the third cylinder 153 is fixedly installed on the side of the positioning frame 152 away from the channel steel support shaft, and the positioning sleeve 154 is fixedly installed at one end of the output shaft of the third cylinder 153 passing through the positioning frame 152, and the positioning sleeve 154 contacts the channel steel support shaft.

[0085] Among them, the support shaft positioning assembly 15 is used for the pneumatic positioning of the support shaft. Positioning and demolding do not require manual operation, which improves efficiency and reduces labor intensity. The movement of the positioning sleeve 154 is driven by the telescopic movement of the third cylinder 153 to realize the positioning and demolding of the support shaft.

[0086] A positioning method for a forward-moving outer gantry positioning device is as follows:

[0087] Step 1: First, adjust the channel steel end positioning assembly 14 in the positioning device main body 1, and select a suitable positioning plate 142 to achieve the required channel steel end positioning dimension.

[0088] Step 2: Select a suitable channel steel positioning assembly 123 and install it. Control the positioning rotor 1222 in the channel steel positioning rotor assembly 122 to rotate to fit with the limit block 1223 through the first cylinder 1242 in the channel steel positioning cylinder assembly 124 to complete the adjustment of the positioning device main body 1.

[0089] Step 3: Lift and transport the channel steel assembly on one side of the forward-moving outer gantry to the roller 1262 of the height initial support assembly 126 of the positioning device main body 1. The roller 1262 rolls to push the channel steel assembly to fit with the positioning plate 142 of the channel steel end positioning assembly 14.

[0090] Step 4: After the second cylinder 1252 of the channel steel clamping cylinder assembly 125 controls the clamping slider 1253 to extend, the pressing head 1255 on the clamping slider 1253 presses against the channel steel assembly and causes it to move. The inner surface of the channel steel flange is lifted by the pressing force on the side of the channel steel and fits with the height positioning screw 1233. At the same time, when it is pushed until the web surface fits with the spacing positioning screw 1234, the positioning and clamping of the channel steel are completed;

[0091] Step 5: Place the support shaft into the positioning sleeve 154 of the support shaft positioning assembly 15. Control the positioning sleeve 154 to extend through the third cylinder 153, and push the support shaft until it fits with the channel steel to complete the positioning of the support shaft;

[0092] Step 6: Sequentially repeat Step 3 and Step 4 to complete the positioning of the channel steel assembly on the other side;

[0093] Step 7: Repeat Step 5 to complete the positioning of the other side of the support shaft;

[0094] Step 8: Carry the upper crossbeam and the lower crossbeam onto the channel steel to complete the positioning of the forward-moving outer gantry; after the positioning is completed, perform the demolding operation: retract the third cylinder 153 to complete the demolding of the support shaft positioning assembly 15; retract the second cylinder 1252 to complete the demolding of the channel steel clamping cylinder assembly 125. The extension of the first cylinder 1242 drives the positioning rotator 1222 to rotate to a certain angle, so that the channel steel positioning assembly 123 is completely separated from the channel steel. At this time, the channel steel falls onto the height initial support assembly 126 to complete the demolding.

[0095] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device.

[0096] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning device for a forward-moving outer gantry, comprising a positioning device main body (1), characterized in that: The main body (1) of the positioning device includes: a base platform (11), a clamping and positioning assembly (12), and a long guide rail (13); The long guide rail (13) is fixedly installed on the upper surface of the base platform (11), and the clamping and positioning assembly (12) is fixedly installed on the long guide rail (13); The clamping and positioning assembly (12) includes: a clamping bottom plate (121), a channel steel positioning rotating body assembly (122), a channel steel positioning assembly (123), a channel steel positioning cylinder assembly (124), a channel steel clamping cylinder assembly (125), and a height initial support assembly (126). The lower surface of the clamping bottom plate (121) is installed on the long guide rail (13) through a guide rail slider; The channel steel positioning rotating body assembly (122) includes: a positioning seat (1221), a positioning rotating body (1222), and a limit block (1223). The positioning seat (1221) is fixedly installed in the middle of the clamping bottom plate (121). The bottoms of the two positioning rotating bodies (1222) are rotatably connected to the upper surface of the positioning seat (1221). The two limit blocks (1223) are fixedly installed on both sides of the upper surface of the positioning seat (1221). A fixing body (1224) is fixedly installed on the side surface of the positioning rotating body (1222); The channel steel positioning assembly (123) includes: a positioning block (1231), a height support block (1232), a height positioning screw (1233), and a spacing positioning screw (1234). The positioning block (1231) is fixedly installed on the surface of the fixing body (1224) through a pin. The height support block (1232) is fixedly installed on the side of the positioning block (1231) away from the limit block (1223). The limit block (1223) is in contact with the adjacent positioning block (1231). The height positioning screw (1233) is installed on the height support block (1232). The spacing positioning screw (1234) is fixedly installed on the side of the positioning block (1231) away from the positioning rotating body (1222); The channel steel positioning cylinder assembly (124), the channel steel clamping cylinder assembly (125), and the height initial support assembly (126) are all fixedly installed on the upper surface of the clamping bottom plate (121). A connection mechanism is provided between the channel steel positioning cylinder assembly (124) and the positioning rotating body (1222); The height initial support assembly (126) includes: a U-shaped support base (1261) and a roller (1262). The two U-shaped support bases (1261) are respectively fixedly installed on the upper surface of the clamping bottom plate (121) and on both sides of the channel steel positioning cylinder assembly (124). The two ends of the roller (1262) are rotatably connected to the top of the U-shaped support base (1261); During operation, first place the channel steel on the roller (1262) of the height initial support assembly (126). At this time, the height of the inner surface of the channel steel flange is lower than that of the height positioning screw (1233). The channel steel is tightened by the channel steel clamping cylinder assembly (125) and the channel steel moves, so that the inner surface of the flange and the inner side of the web are in contact with the channel steel positioning assembly (123), completing its positioning.

2. The positioning device for a forward-moving outer gantry according to claim 1, characterized in that: The connecting mechanism includes a rotating body slider (1225) fixedly installed on the side of the positioning rotating body (1222). The output end of the channel steel positioning cylinder assembly (124) is fixedly connected with a connecting pin (1226), and the connecting pin (1226) slides in a keyway formed inside two rotating body sliders (1225).

3. The positioning device of a forward-moving outer gantry according to claim 2, characterized in that: The channel steel positioning cylinder assembly (124) includes a positioning cylinder bracket (1241) and a first cylinder (1242). The positioning cylinder bracket (1241) is fixedly installed on the side of the middle part of the clamping bottom plate (121), and the first cylinder (1242) is fixedly installed on the side of the positioning cylinder bracket (1241) away from the positioning rotating body (1222). The output shaft of the first cylinder (1242) is fixedly connected with the connecting pin (1226).

4. The positioning device of a forward-shifting outer gantry according to claim 3, characterized in that: The channel steel clamping cylinder assembly (125) includes a clamping cylinder bracket (1251), a second cylinder (1252), a clamping slider (1253) and a limiting guide rail (1254). Two clamping cylinder brackets (1251) are fixedly installed at both ends of the upper surface of the clamping bottom plate (121). The second cylinder (1252) is fixedly installed on the side of the clamping cylinder bracket (1251) away from the positioning rotating body (1222). The clamping slider (1253) is fixedly installed at one end where the output shaft of the second cylinder (1252) passes through the clamping cylinder bracket (1251). The limiting guide rail (1254) is fixedly installed on the upper surface of the clamping bottom plate (121) and is located below the clamping slider (1253). The bottom of the clamping slider (1253) slides on the limiting guide rail (1254), and a tightening head (1255) is fixedly installed on the side of the clamping slider (1253) close to the positioning rotating body (1222).

5. The positioning device of a forward-shifting outer gantry according to claim 4, characterized in that: The positioning device main body (1) further includes a channel steel end positioning assembly (14); The channel steel end positioning assembly (14) includes a fixed base (141) and a positioning plate (142). The fixed base (141) is fixed on the upper surface of one end of the base platform (11), and the positioning plate (142) is fixedly installed on the top of the fixed base (141) through at least two fixing pins.

6. The positioning device of a forward-moving outer gantry according to claim 5, characterized in that: The positioning device main body (1) further includes a support shaft positioning assembly (15); The support shaft positioning assembly (15) includes a support frame (151), a positioning frame (152), a third cylinder (153) and a positioning sleeve (154). Two support frames (151) are fixedly installed on both sides of the base platform (11). The positioning frame (152) is fixedly installed on the top of the support frame (151). The third cylinder (153) is fixedly installed on the side of the positioning frame (152) away from the channel steel support shaft. The positioning sleeve (154) is fixedly installed at one end where the output shaft of the third cylinder (153) passes through the positioning frame (152), and the positioning sleeve (154) contacts the channel steel support shaft.

7. A positioning method for a positioning device of a forward-moving outer gantry, including the positioning device of a forward-moving outer gantry described in claim 6, characterized in that: The steps are as follows: Step 1: First, adjust the channel steel end positioning component (14) in the positioning device main body (1), and select a suitable positioning plate (142) to achieve the required channel steel end positioning dimension; Step 2: Select a suitable channel steel positioning component (123) and install it. Control the positioning rotor (1222) in the channel steel positioning rotor assembly (122) to rotate to fit with the limit block (1223) through the first cylinder (1242) in the channel steel positioning cylinder assembly (124), and complete the adjustment of the positioning device main body (1); Step 3: Hoist the channel steel assembly on one side of the forward-moving external gantry to the roller (1262) of the height initial support component (126) of the positioning device main body (1). The roller (1262) rolls to push the channel steel assembly to fit with the positioning plate (142) of the channel steel end positioning component (14); Step 4: After the second cylinder (1252) of the channel steel clamping cylinder assembly (125) controls the clamping slider (1253) to extend, the pressing head (1255) on the clamping slider (1253) presses against the channel steel assembly to move. The inner surface of the channel steel flange is lifted by the pressing force on the side of the channel steel to fit with the height positioning screw (1233), and at the same time, when it is pushed to the web surface to fit with the spacing positioning screw (1234), the positioning and clamping of the channel steel are completed; Step 5: Place the support shaft into the positioning sleeve (154) of the support shaft positioning component (15). Control the positioning sleeve (154) to extend through the third cylinder (153), and push the support shaft to fit with the channel steel to complete the positioning of the support shaft; Step 6: Repeat Step 3 and Step 4 in sequence to complete the positioning of the channel steel assembly on the other side; Step 7: Repeat Step 5 to complete the positioning of the other side of the support shaft; Step 8: Carry the upper crossbeam and the lower crossbeam onto the channel steel to complete the positioning of the forward-moving external gantry.

8. A positioning method for a front-shifting outer gantry positioning device according to claim 7, characterized in that: In the above Step 8: After positioning, perform the demolding operation: Retract the third cylinder (153) to complete the demolding of the support shaft positioning component (15); Retract the second cylinder (1252) to complete the demolding of the channel steel clamping cylinder assembly (125), and the extension of the first cylinder (1242) drives the positioning rotor (1222) to rotate to a certain angle, so that the channel steel positioning component (123) is completely separated from the channel steel. At this time, the channel steel falls onto the height initial support component (126) to complete the demolding.

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