A galvanized pipe bending machine

Abstract

The utility model relates to the technical field of bending machine, concretely relates to a galvanized pipe fitting bending machine, including the bottom plate, still including the bending mechanism, and the bending mechanism includes the clamping structure, the bending structure, two along the symmetrical setting of sliding seat of front and back direction are slidably installed in the vertical sliding slot, and the two fixed rollers along the front and back direction are symmetrically arranged and are fixed to the front side of rotating seat, and the clamping roller is slidably installed in the inside of horizontal sliding slot, and the limiting structure for limiting the one -way movement of two sliding seats is equipped with in the vertical sliding slot rear side. Advantageous effects: through moving the clamping roller in the clamping structure, the clamping roller and fixed roller mutually cooperate and carry out the clamping fixed of the pipe fitting of different pipe diameter size, then utilize the bending structure and carry out the bending of pipe fitting, in the process of bending, utilize the limiting structure and limit two sliding seat one -way movement, to avoid the rebound phenomenon of pipe fitting both ends after bending, improved the accuracy of pipe fitting bending radian, improved the quality of bending.

Description

Technical Field

[0001] This utility model relates to the field of bending machine technology, and in particular to a bending machine for galvanized pipe fittings. Background Technology

[0002] Galvanized pipe, also known as galvanized steel pipe, is divided into hot-dip galvanized and electro-galvanized types. Hot-dip galvanized pipe has a thicker coating, with advantages such as uniform coating, strong adhesion, and long service life. Electro-galvanized pipe has a lower cost, but the surface is not very smooth, and its corrosion resistance is much worse than that of hot-dip galvanized pipe. Cutting machines or bending machines are usually used in the processing of galvanized steel pipe, while pipe bending machines are required for processing galvanized steel pipe.

[0003] By comparing the pipe bending machine with patent publication number CN218855304U, in this solution, the upper support is pushed down by a hydraulic cylinder, which drives the bending wheel to press the pipe below down to perform the bending operation. However, when pressing the pipe, since the pipe is placed above the lower support and is not clamped, the pipe may shift when pressed down, which may affect the bending point, resulting in inaccurate bending arc, reduced bending quality, and may even cause the pipe to be scrapped. Utility Model Content

[0004] The purpose of this utility model is to provide a galvanized pipe bending machine to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A galvanized pipe bending machine includes a base plate and a bending mechanism for bending the pipe, the bending mechanism being located above the base plate;

[0007] The bending mechanism includes a clamping structure for clamping and fixing the pipe fittings and a bending structure for bending the pipe fittings.

[0008] The clamping structure includes a vertical slide groove on the rear side of the base plate. Two sliding seats symmetrically arranged in the front-back direction are slidably installed in the vertical slide groove. A rotating seat is rotatably installed on the upper end of the sliding seat. A torsion spring is connected between the rotating end of the rotating seat and the sliding seat. Two fixed rollers symmetrically arranged in the front-back direction are fixedly installed on the front side of the rotating seat. A transverse slide groove is opened at the front end of the rotating seat. A clamping roller is slidably installed in the transverse slide groove. A locking bolt is provided between the clamping roller and the transverse slide groove. A limiting structure for restricting the unidirectional movement of the two sliding seats is provided on the rear side of the vertical slide groove.

[0009] Preferably, the limiting structure includes a limiting frame disposed on the rear side of the vertical slide groove, a limiting plate slidably installed inside the limiting frame, a pull plate fixed to the rear end of the limiting plate, multiple inner one-way teeth fixed to the rear end of the sliding seat, multiple outer one-way teeth fixed to the front end of the limiting plate near the sliding seat, the outer one-way teeth slidingly engaging with the inner one-way teeth, and a limiting spring connecting the limiting plate and the limiting frame.

[0010] Preferred: The bending structure includes two slide rails symmetrically arranged in the front and rear directions on the front side of the base plate. A lead screw is rotatably installed inside the slide rail. A moving motor is installed at the rotating end of the lead screw. The output end of the moving motor is fixed to the rotating end of the lead screw through a coupling. A sliding frame is slidably installed between the two slide rails. The sliding frame is threadedly connected to the lead screw. A mounting seat is installed on the sliding frame. A fixing frame is installed on the upper end of the mounting seat. A bending plate is slidably installed inside the fixing frame. A sliding plate is provided on the front side of the bending plate. A compression spring is connected between the sliding plate and the bending plate. A fixing seat is provided on the upper end of the limiting frame. A pad is fixed on the upper end of the fixing seat.

[0011] Preferably, a hydraulic cylinder is provided between the sliding plate and the fixed frame.

[0012] Preferably, both the clamping roller and the fixing roller are made of rubber.

[0013] Preferably, the mounting base and the sliding frame are connected by bolts.

[0014] Preferably, the fixed base and the limiting frame are connected by bolts.

[0015] Compared with existing technologies, the beneficial effects are as follows:

[0016] By moving the clamping rollers within the clamping structure, the clamping rollers and fixed rollers work together to clamp and fix pipe fittings of different diameters. Then, the bending structure is used to bend the pipe fittings. During the bending process, the limiting structure restricts the unidirectional movement of the two sliding seats, thereby preventing springback at both ends of the bent pipe fittings, improving the accuracy of the bending arc and the quality of the bending. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a spatial perspective view of a galvanized pipe bending machine according to the present invention;

[0019] Figure 2This is a cross-sectional view of the internal structure of the fixing frame of the galvanized pipe bending machine described in this utility model;

[0020] Figure 3 This is a schematic diagram of the clamping structure of the galvanized pipe bending machine described in this utility model;

[0021] Figure 4 This is a cross-sectional view of the internal structure of the limiting frame of the galvanized pipe bending machine described in this utility model;

[0022] Figure 5 This is a cross-sectional view of the structure between the outer one-way teeth and the inner one-way teeth of the galvanized pipe bending machine described in this utility model;

[0023] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0024] The annotations in the attached figures are explained as follows:

[0025] 100. Base plate; 201. Slide rail; 202. Lead screw; 203. Sliding frame; 204. Mounting base; 205. Fixing frame; 206. Bending plate; 207. Sliding plate; 208. Hydraulic cylinder; 209. Vertical slide groove; 210. Sliding seat; 211. Rotating seat; 212. Torsion spring; 213. Fixing roller; 214. Horizontal slide groove; 215. Clamping roller; 216. Limiting frame; 217. Limiting plate; 218. Outer one-way tooth; 219. Inner one-way tooth; 220. Fixing base; 221. Pad plate; 222. Pull plate; 223. Moving motor. Detailed Implementation

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components. All electrical components mentioned in this document are electrically connected to an external main controller and 220V AC mains power, and the main controller can be a conventionally known control device such as a computer. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] like Figures 1-6 As shown, a galvanized pipe bending machine includes a base plate 100 and a bending mechanism for bending the pipe, the bending mechanism being located above the base plate 100.

[0029] In this embodiment, the bending mechanism includes a clamping structure for clamping and fixing the pipe fitting and a bending structure for bending the pipe fitting.

[0030] The clamping structure includes a vertical slide groove 209 on the rear side of the base plate 100. Two sliding seats 210 symmetrically arranged in the front-back direction are slidably installed in the vertical slide groove 209. A rotating seat 211 is rotatably installed on the upper end of the sliding seat 210. A torsion spring 212 is connected between the rotating end of the rotating seat 211 and the sliding seat 210. Two fixed rollers 213 symmetrically arranged in the front-back direction are fixedly installed on the front side of the rotating seat 211. A transverse slide groove 214 is opened at the front end of the rotating seat 211. A clamping roller 215 is slidably installed in the transverse slide groove 214. A locking bolt is provided between the clamping roller 215 and the transverse slide groove 214. Both the clamping roller 215 and the fixed roller 213 are made of rubber. A limiting structure is provided on the rear side of the vertical slide groove 209 to restrict the unidirectional movement of the two sliding seats 210.

[0031] The limiting structure includes a limiting frame 216 disposed on the rear side of the vertical slide groove 209. A limiting plate 217 is slidably installed inside the limiting frame 216. A pull plate 222 is fixed to the rear end of the limiting plate 217. Multiple inner one-way teeth 219 are fixed to the rear end of the sliding seat 210. Multiple outer one-way teeth 218 are fixed to the front end of the limiting plate 217 near the sliding seat 210. The outer one-way teeth 218 slide with the inner one-way teeth 219. A limiting spring is connected between the limiting plate 217 and the limiting frame 216.

[0032] The bending structure includes two slide rails 201 symmetrically arranged in the front-rear direction on the front side of the base plate 100. A lead screw 202 is rotatably mounted inside each slide rail 201. A moving motor 223 is mounted on the rotating end of the lead screw 202. The output end of the moving motor 223 is fixed to the rotating end of the lead screw 202 via a coupling. A sliding frame 203 is slidably mounted between the two slide rails 201. The sliding frame 203 is threadedly connected to the lead screw 202. A mounting base 204 is mounted on the sliding frame 203, and the mounting base 204 is bolted to the sliding frame 203. A fixing frame 205 is mounted on the upper end of the mounting base 204. A bending plate 206 is slidably mounted inside the fixing frame 205. A sliding plate 207 is provided on the front side of the bending plate 206. A compression spring is connected between the sliding plate 207 and the bending plate 206. A hydraulic cylinder 208 is provided between the sliding plate 207 and the fixed frame 205. A fixed seat 220 is provided at the upper end of the limiting frame 216. The fixed seat 220 and the limiting frame 216 are connected by bolts. A pad 221 is fixed at the upper end of the fixed seat 220. By moving the clamping roller 215 in the clamping structure, the clamping roller 215 and the fixed roller 213 cooperate to clamp and fix pipes of different diameters. Then, the bending structure is used to bend the pipe. During the bending process, the limiting structure restricts the unidirectional movement of the two sliding seats 210, thereby avoiding the springback phenomenon at both ends of the bent pipe, improving the accuracy of the bending arc of the pipe and improving the bending quality.

[0033] Working principle: First, the pipe is inserted between the two clamping rollers 215 and the fixed roller 213. Then, the clamping rollers 215 are pushed back and forth to adjust the distance between the clamping rollers 215 and the fixed roller 213, so as to accommodate pipes of different diameters. After the pipe is clamped and fixed, the moving motor 223 is started to drive the lead screw 202 to rotate, which in turn drives the sliding frame 203 to move backward, and drives the bending plate 206 inside the fixed frame 205 to move backward. When the bending plate 206 moves to the pipe, it pushes the center of the pipe to move backward to bend the pipe.

[0034] During bending, the bending plate 206 pushes the center of the pipe fitting closer to the pad 221, pressing the pipe fitting against the front end of the pad 221, thus completing the bending operation. Simultaneously, the concave center of the pipe fitting causes both ends to contract towards the center, which not only drives the two rotating seats 211 to rotate but also causes the two sliding seats 210 to move closer together. When the sliding seats 210 move, the inner one-way teeth 219 on the sidewall of the sliding seat 210 press against the outer one-way teeth 218 on the sidewall of the limiting plate 217, ensuring that the sliding seats 210 can only move towards the center of the pipe fitting and not towards the ends. This effectively prevents the ends of the pipe fitting from springing back outwards when the center is pressed, and prevents the pipe fitting from shifting due to uneven pressure, thus avoiding the possibility of deviation in the bending arc.

[0035] Simultaneously, after the bending plate 206 presses the pipe fitting onto the pad 221, the bending plate 206 will be subjected to the reaction force from the pad 221. Under the continuous pressure applied to the pipe fitting by the bending plate 206, the bending plate 206 will gradually retract inside the fixed frame 205, gradually compressing the compression spring. As a result, the release force of the compression spring gradually increases, which in turn leads to a gradual increase in the pressing force of the bending plate 206 on the pipe fitting. This avoids the phenomenon of springback at the center of the pipe fitting, ensures the accuracy of the pipe fitting after bending, improves the bending quality, and reduces the possibility of the pipe fitting being scrapped.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A galvanized pipe bending machine, comprising a base plate (100), characterized in that: It also includes a bending mechanism for bending the pipe fittings, the bending mechanism being located above the base plate (100); The bending mechanism includes a clamping structure for clamping and fixing the pipe fitting, and a bending structure for bending the pipe fitting. The clamping structure includes a vertical slide groove (209) on the rear side of the base plate (100). Two sliding seats (210) symmetrically arranged in the front-back direction are slidably installed in the vertical slide groove (209). A rotating seat (211) is rotatably installed on the upper end of the sliding seat (210). A torsion spring (212) is connected between the rotating end of the rotating seat (211) and the sliding seat (210). Two fixed rollers (213) symmetrically arranged in the front-back direction are fixedly provided on the front side of the rotating seat (211). A transverse slide groove (214) is provided at the front end of the rotating seat (211). A clamping roller (215) is slidably installed in the transverse slide groove (214). A locking bolt is provided between the clamping roller (215) and the transverse slide groove (214). A limiting structure for restricting the unidirectional movement of the two sliding seats (210) is provided on the rear side of the vertical slide groove (209).

2. The galvanized pipe bending machine according to claim 1, characterized in that: The limiting structure includes a limiting frame (216) disposed on the rear side of the vertical slide groove (209). A limiting plate (217) is slidably installed inside the limiting frame (216). A pull plate (222) is fixed to the rear end of the limiting plate (217). A plurality of inner one-way teeth (219) are fixed to the rear end of the sliding seat (210). A plurality of outer one-way teeth (218) are fixed to the front end of the limiting plate (217) near the sliding seat (210). The outer one-way teeth (218) slide with the inner one-way teeth (219). A limiting spring is connected between the limiting plate (217) and the limiting frame (216).

3. A galvanized pipe bending machine according to claim 2, characterized in that: The bending structure includes two slide rails (201) symmetrically arranged in the front and rear directions on the front side of the base plate (100). A lead screw (202) is rotatably mounted inside each slide rail (201). A moving motor (223) is mounted on the rotating end of the lead screw (202). The output end of the moving motor (223) is fixed to the rotating end of the lead screw (202) through a coupling. A sliding frame (203) is slidably mounted between the two slide rails (201). The sliding frame (203) is screwed to the lead screw (202). The sliding frame (203) is connected by a mounting base (204), and a fixed frame (205) is installed on the upper end of the mounting base (204). A bending plate (206) is slidably installed inside the fixed frame (205). A sliding plate (207) is provided on the front side of the bending plate (206). A compression spring is connected between the sliding plate (207) and the bending plate (206). A fixed seat (220) is provided on the upper end of the limiting frame (216), and a pad (221) is fixed on the upper end of the fixed seat (220).

4. A galvanized pipe bending machine according to claim 3, characterized in that: A hydraulic cylinder (208) is provided between the sliding plate (207) and the fixed frame (205).

5. A galvanized pipe bending machine according to claim 4, characterized in that: Both the clamping roller (215) and the fixing roller (213) are made of rubber.

6. A galvanized pipe bending machine according to claim 5, characterized in that: The mounting base (204) and the sliding frame (203) are connected by bolts.

7. A galvanized pipe bending machine according to claim 6, characterized in that: The fixed base (220) and the limiting frame (216) are connected by bolts.

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