A cart handrail pipe bending machine

Abstract

The utility model belongs to pipe material processing technical field, concretely relates to a kind of cart handrail pipe material pipe bending machine, including the pipe bending die of being installed on pipe bending machine, the arc side wall of pipe bending die is attached and is provided with the flexible pad of detachable, the side array of flexible pad towards pipe material is equipped with the protruding piece of pyramid, the cutting surface of being convenient for clamping is equipped with in the axial both ends of flexible pad, pipe bending die is evenly provided with T slot along its arc surface circumferential direction, the number of T slot is at most three;The utility model through detachable fixed in the flexible pad of the arc wall of pipe bending die, can prevent the contact of pipe material and metal wall, provide buffering effect, prevent pipe material to be extruded and appear recess or blotchy mark, and flexible pad can be taken out by pipe material when being avoided, realize continuous antiskid in processing process, improve production efficiency, save time and effort.

Description

Technical Field

[0001] This utility model belongs to the field of pipe processing technology, specifically relating to a pipe bending machine for trolley handrails. Background Technology

[0002] A trolley handle is a U-shaped or curved support structure on a trolley, shopping cart, or other transport tool for people to hold onto. Its core function is to provide an ergonomic grip point and a point of force for pushing. A pipe bending machine is an industrial device specifically designed to precisely bend metal pipes (such as stainless steel or carbon steel pipes) into the required angles. By presetting multiple angle parameters through a PLC system, it can form complex curves in one go, which must meet the requirements of the handle for curvature accuracy and structural strength.

[0003] In existing technologies, the pipe bending mold of a pipe bending machine is used to fix the front end of the pipe and prevent the pipe body from sliding and shifting during bending. In order to enhance the anti-slip effect, the industry usually uses anti-slip grooves arranged at equal intervals on the inner wall of the mold or directly pads a layer of sandpaper. However, the sharp edges of the anti-slip grooves are prone to line contact. For soft pipes such as copper and aluminum, the groove edge embeds material under high pressure, which can easily form visible dents or marks, affecting the quality of the pipe. When the sandpaper is unclamped, it often sticks to the outer wall of the pipe and needs to be peeled off manually and re-attached to the inner wall of the mold, which is time-consuming, labor-intensive and delays processing efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a trolley handle pipe bending machine. By using a flexible pad that can be detachably fixed to the arc-shaped wall of the bending die, the contact between the pipe and the metal wall can be eliminated, providing a buffering effect and preventing the pipe from being squeezed and developing dents or marks. It can also prevent the flexible pad from being pulled out by the pipe when the clamp is removed, achieving continuous anti-slip during the processing, improving production efficiency, and saving time and effort.

[0005] The specific technical solution adopted by this utility model is as follows: A trolley handle pipe bending machine includes a pipe bending clamping die installed on the bending machine. The arc-shaped sidewall of the pipe bending clamping die is fitted with a detachable flexible pad. The side of the flexible pad facing the pipe is provided with an array of pyramidal protrusions. The two axial ends of the flexible pad are provided with cutting surfaces for easy clamping.

[0006] The bending die has T-slots evenly distributed along its circumferential arc surface, and the number of T-slots is at most three.

[0007] The flexible pad has an integrally formed T-shaped block on the back side that matches the number of T-shaped grooves, and the T-shaped block is movably fitted with the corresponding T-shaped groove.

[0008] Each of the T-blocks is fixedly connected to a guide plate on its outer side, and one end of the guide plate extends outward to form an operating handle.

[0009] The axial length of the flexible pad is adapted to the effective working section of the bending die.

[0010] The surface of the flexible pad is coated with a protective coating.

[0011] The hardness of the flexible pad is 60-70 Shore A.

[0012] The radial width of the operating handle is greater than that of the T-block.

[0013] The technical effects achieved by this utility model are as follows: by using a flexible pad that can be detachably fixed to the arc-shaped wall of the pipe bending mold, the contact between the pipe and the metal wall can be eliminated, providing a buffering effect, preventing the pipe from being squeezed and developing dents or marks, and preventing the flexible pad from being pulled out by the pipe when unclamping, thus achieving continuous anti-slip during the processing, improving production efficiency, and saving time and effort. Attached Figure Description

[0014] Figure 1 This is an overall view of the pipe bending machine provided in the embodiment of this utility model; Figure 2 This is a separate illustration of the pipe bending clamping mold provided in an embodiment of this utility model; Figure 3 This is an exploded view of the pipe bending clamp provided in an embodiment of this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Pipe bending machine; 2. Pipe bending clamp; 3. T-slot; 4. Flexible pad; 5. T-block; 6. Guide plate; 7. Protrusion; 8. Cutting surface; 9. Operating handle. Detailed Implementation

[0016] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0017] like Figures 1-3As shown, a trolley handle pipe bending machine includes a bending die 2 installed on a bending machine 1. A removable flexible pad 4 is fitted to the arc-shaped side wall of the bending die 2. The hardness of the flexible pad 4 is 60-70 Shore A. T-slots 3 are evenly opened along the circumferential direction of the arc surface of the bending die 2. The number of T-slots 3 is at most three. The axial length of the flexible pad 4 is adapted to the effective working section of the bending die 2. Pyramidal protrusions 7 are arranged on the side of the flexible pad 4 facing the pipe. T-blocks 5 are integrally formed on the back side of the flexible pad 4, matching the number of T-slots 3. The T-blocks 5 are movably fitted with the corresponding T-slots 3. A guide plate 6 is fixedly connected to the outside of each T-block 5. An operating handle 9 is extended outward from one end of the guide plate 6. The radial width of the operating handle 9 is greater than that of the T-block 5. The surface of the flexible pad 4 is coated with a protective coating. Cutting surfaces 8 are provided at both ends of the flexible pad 4 for easy clamping.

[0018] According to the above structure, when the pipe bending machine 1 is started, the pipe bending die 2 is driven by the electric cylinder and works with the wheel die to clamp the pipe. The flexible pad 4 is used to wrap the outer wall of the pipe by elastic deformation. The flexible pad 4 can be made of materials such as microporous polyurethane (MPU), nitrile rubber (NBR), and natural rubber (NR), but is preferably made of microporous polyurethane (MPU), which is wear-resistant, waterproof, breathable, and has a hardness of 60-70 Shore. A. This design balances elastic deformation capacity and support strength. The arrayed protrusions 7 contact the pipe surface, increasing friction to prevent slippage. The flexible pad 4 absorbs impact loads through its elastic buffering effect. Simultaneously, the damping effect of the protrusions 7 controls the pipe deformation rate. When the pipe bending machine 1 drives the pipe bending mold 2 to unclamp and release the pipe, the elastically recovering flexible pad 4 automatically relaxes and returns to its original position. Because it is fixed by the interlocking of the T-block 5 and the T-slot 3, it avoids adhering to the pipe surface and being pulled out of the curved wall of the pipe bending mold 2 by the pipe. Furthermore, the guide plate 6 can be pulled out from the T-slot 3 by pinching the operating handle 9, thereby removing the T-block 5 and the flexible pad 4 together. The number of T-slots 3 is at most three, evenly distributed along the circumference, which can maintain the interlocking stability with the T-block 5 and minimize the impact of the slotting on the structure of the pipe bending mold 2. Similarly, during assembly, the flexible pad 4 is squeezed and pinched on both sides to reduce the contact between its sidewalls and the arc-shaped wall of the bending mold 2. Then, the guide plate 6, together with the T-block 5, is inserted into the T-slot 3 and pushed in axially. The guide plate 6 can enhance the torsional stiffness and guide the T-block 5 to enter the slot more accurately and conveniently. The guide plate 6 can be made of materials such as stainless steel and alloy metals, with stainless steel being preferred. It is formed by composite injection molding and fixed to the T-block 5. The radial width of the operating handle 9 is greater than that of the T-block 5, which can restrict the operating handle 9 from being inserted into the T-slot 3, making it easier to pull the T-block 5 and the guide plate 6. The inclined surface formed by the cutting surface 8 reduces the sharp angle and facilitates the smooth fitting of the pipe with the bending mold 2. The protective coating on the surface of the flexible pad 4 can be a UV coating to enhance the wear resistance and anti-aging ability of the flexible pad 4.

[0019] The working principle of this utility model is as follows: When the pipe bending machine 1 is started, the pipe bending clamping mold 2 is driven by the electric cylinder and cooperates with the wheel mold to clamp the pipe. The flexible pad 4 is used to wrap the outer wall of the pipe by elastic deformation, and progressive pressure is applied to the pipe. The flexible pad 4 can be made of materials such as microporous polyurethane (MPU), nitrile rubber (NBR), and natural rubber (NR). Microporous polyurethane (MPU) is preferred. It is wear-resistant, waterproof and breathable, and has a hardness of 60-70 Shore A. It can take into account both elastic deformation capacity and support strength, and avoid the pipe from sinking. The array of protrusions 7 contact the surface of the pipe, increase friction to prevent slippage, and form multi-point support to prevent local crushing. Furthermore, the elastic buffering effect of the flexible pad 4 absorbs the impact load, while the damping effect of the protrusion 7 controls the deformation rate of the pipe. When the pipe bending machine 1 drives the pipe bending die 2 to unclamp and release the pipe, the elastically restored flexible pad 4 automatically relaxes and recovers. Moreover, because it is fixed by the interlocking of the T-block 5 and the T-slot 3, it can avoid adhering to the surface of the pipe and being carried out of the arc wall of the pipe bending die 2 by the pipe. It can also be pulled out of the T-slot 3 by squeezing the operating handle 9, thereby removing the T-block 5 and the flexible pad. 4. Take them out together and remove them. There are at most three T-slots 3, which are evenly distributed along the circumference. This can maintain the stability of the fit with the T-block 5 and minimize the impact of the slotting on the structure of the bending mold 2. Similarly, during assembly, squeeze and pinch the two sides of the flexible pad 4 to reduce the contact between its side wall and the arc wall of the bending mold 2. Then insert the guide plate 6 together with the T-block 5 into the T-slot 3 and push it in axially. The guide plate 6 can enhance the torsional stiffness and guide the T-block 5 to enter the slot more accurately and conveniently. Furthermore, the guide plate 6 can be made of materials such as stainless steel and alloy metals, with stainless steel being preferred. It is formed by composite injection molding and fixed to the T-block 5. The radial width of the operating handle 9 is greater than that of the T-block 5, which means that the radial width of the operating handle 9 is also greater than that of the T-slot 3. This can restrict the operating handle 9 from being inserted into the T-slot 3 and keep it at one end of the bending die 2, which facilitates the pulling operation of the T-block 5 and the guide plate 6. The inclined surface formed by the cutting surface 8 reduces the sharp angle and facilitates the smooth fitting of the pipe with the bending die 2, avoiding obstruction. The protective coating on the surface of the flexible pad 4 can be a UV coating to enhance the wear resistance and anti-aging ability of the flexible pad 4.

[0020] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A trolley handle pipe bending machine, comprising a bending die (2) mounted on the bending machine (1), characterized in that: The curved sidewall of the pipe bending clamp (2) is fitted with a removable flexible pad (4). The flexible pad (4) has a pyramidal protrusion (7) arrayed on the side facing the pipe. The flexible pad (4) has cutting surfaces (8) at both ends of the axial direction for easy clamping.

2. The trolley handle pipe bending machine according to claim 1, characterized in that: The bending die (2) is provided with T-slots (3) evenly distributed along its circumferential arc surface, and the number of T-slots (3) is at most three.

3. The trolley handle pipe bending machine according to claim 2, characterized in that: The flexible pad (4) has a T-shaped block (5) integrally formed on the back side, matching the number of T-shaped grooves (3), and the T-shaped block (5) is movably fitted with the corresponding T-shaped groove (3).

4. The trolley handle pipe bending machine according to claim 3, characterized in that: Each of the T-blocks (5) is fixedly connected to a guide plate (6), and one end of the guide plate (6) extends outward to form an operating handle (9).

5. The trolley handle pipe bending machine according to claim 1, characterized in that: The axial length of the flexible pad (4) is adapted to the effective working section of the bending die (2).

6. The trolley handle pipe bending machine according to claim 1, characterized in that: The surface of the flexible pad (4) is coated with a protective coating.

7. The trolley handle pipe bending machine according to claim 1, characterized in that: The hardness of the flexible pad (4) is 60-70 Shore A.

8. The trolley handle pipe bending machine according to claim 4, characterized in that: The radial width of the operating handle (9) is greater than that of the T-block (5).

Images