Rectangular pipe cutting machine

Abstract

The utility model discloses a rectangular pipe cutting machine which comprises a machine base, a clamp device and a saw cutting device are arranged on the machine base, a positioning frame which is fixedly arranged relative to the machine base is arranged on one side of the clamp device, and a positioning table is arranged on the positioning frame. A plurality of supporting structures used for supporting the rectangular pipe are arranged on the positioning frame in the direction away from the clamp device, and the supporting faces of the supporting structures are higher than the positioning table. A positioning structure is fixedly arranged on the positioning table, a positioning groove facing an opening of the clamp device is formed in the positioning structure, the lower side wall of the positioning groove and the supporting face of the supporting structure are arranged in a coplanar mode, and the cross section of the positioning groove is matched with the cross section of a rectangular pipe. And the groove bottom of the positioning groove is used for positioning the end face of the rectangular pipe. The pipe bending positioning device can achieve quick positioning of the specified length, facilitates finding of bending defects of an original pipe, and facilitates reduction of influences on bending machining and reduction of scrapped pieces.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting equipment, in particular to a rectangular pipe cutting machine. Background Art

[0002] The main frame of the tricycle frame is mostly made of rectangular tubes, including the front beam, side beam, tail beam, etc. During production, the rectangular tubes of the required length are first cut according to the design size, and then the rectangular tubes that need to be bent are bent. Among them, the metal circular saw machine is one of the equipment used for rectangular tube cutting, such as Figures 6 to 8 As shown in FIG. 1 , the structure mainly includes a machine base, a clamping device on the machine base, and a sawing device. In actual production, when a circular saw is used to cut rectangular tubes to a fixed length, a stopper for end positioning is usually added to one side of the circular saw, such as Figure 7 and Figure 8 As shown, after the rectangular tube passes through the clamp device from the other side of the circular saw machine, it is pressed against the baffle, and the fixed-length positioning is completed, and then it can be cut. In the subsequent bending process, in order to improve the efficiency and accuracy of the bending process, the inventor improved the tube bending equipment. After the improvement, the end face of the cut rectangular tube is pressed against the designated structure to form a fast and accurate positioning. However, this puts higher requirements on the verticality of the end face of the cut rectangular tube relative to its length direction. At present, the above only uses the fixed-length cutting method of the baffle. During the cutting process, due to the bending of the original tube and other reasons, the verticality of the cut end face cannot meet the above requirements. Fig. 9 As shown, the bending processing positioning accuracy is affected, and even scrapped parts occur. For this reason, the circular saw machine, especially the fixed-length cutting means of the circular saw machine, needs to be improved to avoid the above problems. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a rectangular pipe cutting machine which can realize fast positioning of a specified length, is conducive to discovering bending defects of original pipes, is conducive to reducing the influence on bending processing and reducing the generation of scrapped parts.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a rectangular tube cutting machine, comprising a machine base, a clamping device and a sawing device are provided on the machine base, a positioning frame fixedly arranged relative to the machine base is provided on one side of the clamping device, a positioning platform is provided on the positioning frame, and a plurality of supporting structures for supporting rectangular tubes are arranged on the positioning frame in a direction away from the clamping device, and the supporting surface of the supporting structure is higher than the positioning platform; a positioning structure is fixedly provided on the positioning platform, and a positioning groove opening toward the clamping device is provided on the positioning structure, the lower side wall of the positioning groove is coplanar with the supporting surface of the supporting structure, the cross section of the positioning groove is adapted to the cross section of the rectangular tube, and the bottom of the positioning groove is used to position the end face of the rectangular tube.

[0005] As a preferred technical solution, the positioning structure includes a positioning lower cross bar and a positioning upper cross bar, the positioning lower cross bar is provided with a positioning lower groove which is opened toward the clamping device and the positioning upper cross bar at the same time, the positioning upper cross bar is provided with a positioning upper groove which is opened toward the clamping device and the positioning lower cross bar at the same time, and a laterally arranged upper limit positioning block is fixed in the upper positioning groove, at least the positioning lower groove and the left and right opposite side walls on the positioning upper groove and the upper limit positioning block together form the positioning groove.

[0006] As a preferred technical solution, the side wall of the upper positioning groove away from the clamping device is penetrated by a limit adjustment long hole arranged in the up and down direction, the upper limit block is provided with a limit fastening screw hole corresponding to the limit adjustment long hole one by one, and the limit adjustment long hole is penetrated by a limit fastening bolt fastened to the limit fastening screw hole.

[0007] As a preferred technical solution, at least two C-shaped clips are provided between the positioning structure and the positioning frame.

[0008] As a preferred technical solution, a guiding smooth surface is provided at the notch of the positioning groove to facilitate the insertion of the rectangular tube.

[0009] As a preferred technical solution, the support structure includes support rollers.

[0010] Due to the adoption of the above technical solution, a rectangular tube cutting machine includes a machine base, a clamp device and a sawing device are provided on the machine base, a positioning frame fixedly arranged relative to the machine base is provided on one side of the clamp device, a positioning platform is provided on the positioning frame, and a plurality of supporting structures for supporting rectangular tubes are arranged in a direction away from the clamp device on the positioning frame, and the supporting surface of the supporting structure is higher than the positioning platform; a positioning structure is fixedly provided on the positioning platform, and a positioning groove opening toward the clamp device is provided on the positioning structure, and the lower side wall of the positioning groove is coplanarly arranged with the supporting surface of the supporting structure, and the cross section of the positioning groove is adapted to the cross section of the rectangular tube, and the bottom of the positioning groove is used to position the end face of the rectangular tube. The rectangular tube of the utility model is inserted into the positioning groove after passing through the clamp device from the other side, and is positioned against the bottom of the positioning groove, and the positioning is fast. The restriction of the cross section of the positioning groove makes it difficult for the rectangular tube with a bend to be smoothly inserted into it, so that the staff can find that the original tube has a bend, which is conducive to reducing the impact on the bending process and reducing the generation of scrapped parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0012] Figure 1It is a structural schematic diagram of an embodiment of the utility model;

[0013] Figure 2 yes Figure 1 An enlarged schematic diagram of the positioning structure;

[0014] Figure 3 yes Figure 2 A-direction structural schematic diagram;

[0015] Figure 4 yes Figure 3 The state diagram when the left and right width and height of the positioning slot are adjusted to the maximum;

[0016] Figure 5 yes Figure 3 Schematic diagram of the state after the left and right widths and heights of the positioning slot are reduced;

[0017] Figure 6 It is a structural schematic diagram of an existing circular saw machine;

[0018] Figure 7 yes Figure 6 A schematic diagram of a top view structure;

[0019] Figure 8 yes Figure 6 A right view structural diagram of ;

[0020] Fig. 9 This is a diagram of the original pipe with obvious bends during cutting.

[0021] In the figure: 1-machine base; 2-clamping device; 21-clamping support; 22-fixed clamp; 23-movable clamp; 24-clamping drive cylinder; 3-sawing device; 31-sawing frame; 32-cutting saw; 33-sawing drive motor; 34-sawing feed cylinder; 4-positioning frame; 41-positioning table; 42-support structure; 5-positioning structure; 51-positioning groove; 511-guiding smooth surface; 52-positioning lower cross bar; 521-positioning lower groove; 53-positioning upper cross bar; 531-positioning upper groove; 54-upper limit block; 541-limit adjustment long hole; 542-limit fastening screw hole; 543-limit fastening bolt; 55-C-shaped clamp; 8-stop table; 9-rectangular tube. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0023] like Figure 6 As shown, the rectangular tube cutting machine includes a machine base 1, on which a clamp device 2 and a sawing device 3 are provided. When working, the clamp device 2 clamps the cutting part of the fixed rectangular tube 9, and the sawing device 3 is fed and the cutting is gradually completed. The clamp device 2 includes a clamping support 21, and the left and right sides of the clamping support 21 are respectively installed with a fixed clamp 22 and a movable clamp 23, and the movable clamp 23 is connected to a clamping drive cylinder 24; the rectangular tube 9 passes through the clamp device 2 and the rear seat leans against the clamping support 21, and the clamping drive cylinder 24 drives the movable clamp 23 to move toward the fixed clamp 22 to clamp the rectangular tube 9. The sawing device 3 includes a sawing frame 31 swingably installed on the machine base 1, and a cutting saw 32 is rotatably installed on the sawing frame 31, and the cutting saw 32 is connected to a sawing drive motor 33, and a sawing feed cylinder 34 is provided between the sawing frame 31 and the machine base 1. After the clamp device 2 clamps the rectangular tube 9, the sawing drive motor 33 drives the cutting saw 32 to rotate at a high speed, and the sawing feed cylinder 34 drives the sawing frame 31 to swing, so that the cutting saw 32 feeds toward the rectangular tube 9 to gradually achieve cutting. The above structural principle is a well-known technology in the art and will not be repeated here.

[0024] Among them, the "left" and "right" directions involved in this embodiment are defined by the two sides in the length direction of the rectangular tube 9, the purpose of which is to more clearly illustrate the structure of this embodiment, and is not to limit the scope of protection.

[0025] like Figure 1 As shown, a positioning frame 4 fixedly arranged relative to the machine base 1 is provided on one side of the clamp device 2. The positioning frame 4 can be directly fixedly connected to the machine base 1, or can be separately arranged and fixed relative to the machine base 1. The former is illustrated in this embodiment. A positioning platform 41 is provided on the positioning frame 4. A plurality of supporting structures 42 for supporting the rectangular tube 9 are arranged on the positioning frame 4 in a direction away from the clamp device 2. The supporting surface of the supporting structure 42 is higher than the positioning platform 41. Of course, the supporting surface of the supporting structure 42 is coplanar with the supporting surface of the clamping support 21 in the clamp device 2 to form a continuous support for the rectangular tube 9. Preferably, the supporting structure 42 includes a supporting roller, so that the rotatable supporting structure 42 reduces the resistance of the rectangular tube 9 to the lateral movement.

[0026] The positioning platform 41 is fixed with a positioning structure 5, and the positioning structure 5 is provided with a positioning groove 51 opening toward the clamp device 2. The lower side wall of the positioning groove 51 is coplanar with the support surface of the support structure 42. The cross section of the positioning groove 51 is adapted to the cross section of the rectangular tube 9, and the bottom of the positioning groove 51 is used to position the end face of the rectangular tube 9. The rectangular tube 9 is inserted into the positioning groove 51 after passing through the clamp device 2 from the other side, and is positioned against the bottom of the positioning groove 51, and the positioning is fast. The positioning groove 51 forms a restriction on the circumference of the rectangular tube 9. During the insertion of the rectangular tube 9 into the positioning groove 51, the rectangular tube 9 is guided by the bottom surface of the support structure 42 and the clamping support platform 21, and is guided by the side surface against the fixed clamp 22. Therefore, when the end reaches the positioning groove 51, the rectangular tube 9 with a bend is not easy to be inserted smoothly therein, which is conducive to the staff to find that the original tube is bent, which is conducive to reducing the impact on the bending process and reducing the generation of scrapped parts.

[0027] Of course, in actual operation, the positioning groove 51 and the rectangular tube 9 should be set to a clearance fit according to the curvature allowed by the original tube, such as a clearance of 1 mm, so that the rectangular tube 9 can smoothly rest against the bottom of the groove after insertion to ensure the positioning effect. Accordingly, the positioning groove 51 of this embodiment is mainly used to provide visual feedback for the original tube with a large curvature that can affect the subsequent bending process. Preferably, a guiding smooth surface 511 is provided at the notch of the positioning groove 51 to facilitate the insertion of the rectangular tube 9.

[0028] Furthermore, if Figures 1 to 5 As shown together, the positioning structure 5 of this embodiment includes a positioning lower cross bar 52 and a positioning upper cross bar 53, the positioning lower cross bar 52 is provided with a positioning lower groove 521 opened toward the clamp device 2 and the positioning upper cross bar 53 at the same time, the positioning upper cross bar 53 is provided with a positioning upper groove 531 opened toward the clamp device 2 and the positioning lower cross bar 52 at the same time, and a transverse upper limit block 54 is fixedly arranged in the positioning upper groove 531, at least the left and right opposite side walls of the positioning lower groove 521 and the positioning upper groove 531 and the upper limit block 54 jointly enclose the positioning groove 51. Through this arrangement, the left and right widths and heights of the positioning groove 51 are both adjustable, so that the positioning structure 5 of this embodiment can be adapted to rectangular tubes 9 of multiple specifications for positioning.

[0029] More specifically, if Figure 4As shown, when the left side wall of the upper positioning groove 531 and the left side wall of the lower positioning groove 521 are coplanar, and the right side wall of the upper positioning groove 531 and the right side wall of the lower positioning groove 521 are coplanar, the left-right width of the positioning groove 51 reaches the maximum, and when the upper limit block 54 is adjusted to the highest position, the distance between it and the lower side wall of the lower positioning groove 521 is the maximum, that is, the height of the positioning groove 51 is the maximum. Figure 5 As shown, when the upper positioning cross bar 53 and the lower positioning cross bar 52 move relative to each other laterally, the distance between the left and right opposite side walls of the lower positioning groove 521 and the upper positioning groove 531 decreases, the width of the positioning groove 51 decreases, the upper limit block 54 lowers its height, and the height of the positioning groove 51 decreases. In this way, the left and right width and height of the positioning groove 51 can be adjusted.

[0030] Of course, no matter how the adjustment is made, the side wall of the positioning groove 51 on the same side as the fixing clamp 22 should be coplanar with the clamping surface of the fixing clamp 22. For example, the right side wall of the positioning groove 51 is coplanar with the clamping surface of the fixing clamp 22, and since the rectangular tube 9 is inserted into the positioning groove 51 with the fixing clamp 22 as the side guide, when adjusting the left and right widths of the positioning groove 51, the positioning lower cross bar 52 can remain stationary, and only the positioning upper cross bar 53 needs to be moved leftward or rightward.

[0031] Preferably, if Figures 3 to 5 As shown, at least two C-shaped clips 55 are provided between the positioning structure 5 and the positioning frame 4, and the positioning structure 5 is fixed by fastening with the C-shaped clips 55, and the positioning upper crossbar 53 and the positioning lower crossbar 52 can be fixed on the positioning frame 4 together by relying on the C-shaped clips 55. When the C-shaped clips 55 are released, the positioning structure 5 can adjust the overall positioning position and / or the size of the positioning groove 51. In actual use, since the positioning upper crossbar 53 and the positioning lower crossbar 52 are integral, and only the relative position adjustment in the left and right directions can be performed between the two, bolts can be set between the positioning upper crossbar 53 and the positioning lower crossbar 52 to enhance their integrity; this can refer to the adjustment structure of the upper limit block 54 below, by setting bolts on one of the crossbars and setting long holes in the left and right directions on the other crossbar, the fastening between the two crossbars is achieved while adapting to the left and right relative position adjustment.

[0032] like Figures 2 to 5As shown, in this embodiment, the side wall of the upper positioning groove 531 away from the clamp device 2 is penetrated with a limit adjustment long hole 541 arranged in the up-down direction, and the upper limit block 54 is provided with a limit fastening screw hole 542 corresponding to the limit adjustment long hole 541, and the limit adjustment long hole 541 is penetrated with a limit fastening bolt 543 fastened to the limit fastening screw hole 542. The limit adjustment long hole 541 allows the upper limit block 54 to achieve height adjustment, and after adjustment, it can be re-tightened by the limit fastening bolt 543.

[0033] In this embodiment, the positioning structure 5 is provided with a positioning groove 51 for inserting the end of the rectangular tube 9, so as to position the rectangular tube 9, and the positioning is convenient. The required cutting length is the groove depth of the positioning groove 51 plus the distance from the positioning structure 5 to the sawing device 3. The groove depth of the positioning groove 51 is a fixed value that can be measured. When adjusting the positioning structure 5, it is only necessary to measure the distance from the positioning structure 5 to the sawing device 3, and the positioning position is convenient to adjust. Whether the end of the rectangular tube 9 can be smoothly inserted into the positioning groove 51 can facilitate the staff to intuitively judge whether the curvature of the original tube does not meet the requirements, so as to avoid the rectangular tube 9 with a large curvature and poor verticality of the end face to the length direction from entering the subsequent bending process, and to reduce the generation of scrapped parts; and the original tube with a large curvature can be reused after returning to straighten. In this embodiment, the size of the positioning groove 51 can be adjusted to achieve the adaptive use of the positioning of rectangular tubes 9 of different specifications, so as to broaden the scope of application of this embodiment.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A rectangular tube cutting machine comprising a base on which a clamping device and a sawing device are provided, characterized in that: A positioning frame fixedly arranged relative to the machine base is provided on one side of the clamping device, and a positioning platform is provided on the positioning frame. A plurality of support structures for supporting rectangular tubes are arranged on the positioning frame in a direction away from the clamping device, and the support surface of the support structure is higher than the positioning platform; a positioning structure is fixedly provided on the positioning platform, and a positioning groove opening toward the clamping device is provided on the positioning structure, and the lower side wall of the positioning groove is coplanar with the support surface of the support structure, the cross section of the positioning groove is adapted to the cross section of the rectangular tube, and the bottom of the positioning groove is used to position the end face of the rectangular tube.

2. The rectangular tube cutting machine according to claim 1, characterized in that: The positioning structure includes a positioning lower cross bar and a positioning upper cross bar. The positioning lower cross bar is provided with a positioning lower groove which is opened toward the clamping device and the positioning upper cross bar at the same time. The positioning upper cross bar is provided with a positioning upper groove which is opened toward the clamping device and the positioning lower cross bar at the same time. A transversely arranged upper limit block is fixed in the positioning upper groove. At least the positioning lower groove and the left and right opposite side walls of the positioning upper groove and the upper limit block together form the positioning groove.

3. The rectangular tube cutting machine according to claim 2, characterized in that: The side wall of the upper positioning groove away from the clamping device is penetrated by a limit adjustment long hole arranged in the up and down directions, and the upper limit block is provided with a limit fastening screw hole corresponding to the limit adjustment long hole one by one, and the limit adjustment long hole is penetrated by a limit fastening bolt fastened to the limit fastening screw hole.

4. The rectangular tube cutting machine according to claim 1, wherein: At least two C-shaped clips are provided between the positioning structure and the positioning frame.

5. The rectangular tube cutting machine according to claim 1, characterized in that: The notch of the positioning groove is provided with a guiding smooth surface for facilitating the insertion of the rectangular tube.

6. The rectangular tube cutting machine according to claim 1, characterized in that: The support structure includes support rollers.

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