Square tube machining clamping assembly

Abstract

The utility model relates to a square tube machining clamping assembly which comprises a limiting mechanism, a clamping mechanism and a clamping mechanism, the limiting mechanism comprises a base, a positioning supporting ring base and a plurality of positioning rod sets, the positioning supporting ring base is formed on the base and can be opened and closed, and the positioning rod sets are installed on the positioning supporting ring base and arranged at equal intervals; the positioning supporting ring seat comprises a lower semicircular supporting seat formed on the base and an upper semicircular supporting seat which is in pivot connection with the lower semicircular supporting seat and is matched with the lower semicircular supporting seat; each positioning rod group at least comprises a positioning rod seat formed on the outer peripheral surface of the positioning support ring seat, a positioning rod adjustably mounted in the positioning rod seat and a positioning roller mounted at the inner end part of the positioning rod; and an auxiliary sleeve. The specific limiting mechanism is matched with the auxiliary sleeve, so that a square pipe can be stably and accurately clamped, and precise machining is facilitated; the device is simple in structure, low in cost and suitable for popularization and use.

Description

Technical Field

[0001] This utility model belongs to the field of machining auxiliary parts technology, and relates to a clamping component, especially a clamping component for machining square tubes. Background Technology

[0002] Square and rectangular tubes are a type of steel pipe, referring to steel pipes with equal or unequal side lengths; they are typically made from strip steel through a processing procedure. Generally, the strip steel is unpacked, flattened, rolled, and welded to form a round tube, which is then rolled into a square tube and cut to the required length. If conventional clamping components are used to hold square and rectangular tubes, uneven clamping force distribution can occur, leading to decreased machining stability and reliability.

[0003] Chinese utility model patent CN220029203U discloses a clamping fixture for welding square tubes inside outriggers, comprising: a first mounting frame with a first rotating seat, on which a square tube limiting seat, a telescopic drive device, and two support arms for setting a reinforcing plate are mounted; a second mounting frame with a second rotating seat coaxial with the first rotating seat, on which a shaft tube clamp is mounted; a linear motion module, driven by the first or second mounting frame and driven in a direction parallel to the axis of the first rotating seat; a rotary drive device, driven by the first or second rotating seat; and a square tube placement frame, mounted on the lifting drive device and positioned between the first and second mounting frames. This clamping fixture is used to assemble reinforcing plates, square tubes, and shaft tubes by machine, reducing manual labor and improving production efficiency, laying the foundation for further automation of welding square tubes inside outriggers. However, this clamping fixture for welding square tubes inside outriggers has a complex structure and high cost, making it difficult to apply on a large scale in the field of machining. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a clamping component for square tube machining.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a square tube machining clamping assembly, comprising:

[0006] A limiting mechanism includes a base, an openable and closable positioning support ring formed on the base, and multiple sets of positioning rods installed on the positioning support ring and evenly spaced apart; the positioning support ring includes a lower semi-circular support formed on the base and an upper semi-circular support pivotally connected to and cooperating with the lower semi-circular support; each set of positioning rods includes at least a positioning rod seat formed on the outer circumferential surface of the positioning support ring, a positioning rod adjustablely installed in the positioning rod seat, and a positioning roller installed at the inner end of the positioning rod;

[0007] An auxiliary sleeve, which is held at the center by multiple sets of positioning rods, is used to fit onto the square tube.

[0008] Ideally, a protrusion is formed on the outer surface of the opening of the upper semicircular support, and a limit clearance groove is provided on the protrusion; a clearance groove is provided at the opening of the lower semicircular support, and a limit bolt that cooperates with the limit clearance groove is pivotally connected in the clearance groove, and a fastening nut that cooperates with the protrusion is installed at the outer end of the limit bolt.

[0009] Optimally, each group of positioning rods further includes a connector installed on the outer end of the positioning rod and cooperating with the positioning rod seat, and a locking bolt adjustablely inserted into the side of the positioning support ring seat and cooperating with the positioning rod.

[0010] Ideally, the auxiliary sleeve includes a cylindrical sleeve body, a square hole opened at the center of the sleeve body and concentric therewith, and a plurality of locking screws adjustablely mounted on the circumferential surface of the sleeve body, wherein the size of the square hole matches that of the square tube.

[0011] Furthermore, the auxiliary sleeve also includes a reinforcing convex ring surrounding the circumferential surface of the sleeve body, and a plurality of locking screws are located on both sides of the reinforcing convex ring.

[0012] Optimally, the limiting mechanism further includes a track clamping plate located below the base and a locking bolt connecting the track clamping plate and the base.

[0013] Due to the application of the above technical solutions, this utility model has the following advantages compared with the prior art: The square tube machining clamping component of this utility model, through the use of a specific limiting mechanism and auxiliary sleeve, can achieve stable and precise clamping of the square tube, which is convenient for precision machining; moreover, it has a simple structure and low cost, and is suitable for widespread use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the square tube machining clamping assembly of this utility model;

[0015] Figure 2 This is a schematic diagram of the auxiliary sleeve in the square tube machining clamping assembly of this utility model. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0017] like Figure 1 The square tube machining clamping assembly shown mainly includes a matching limiting mechanism 1 and an auxiliary sleeve 2.

[0018] The limiting mechanism 1 mainly includes a base 11, a lower semicircular support 12, an upper semicircular support 14, and a positioning rod assembly 15. A large-sized hollow structure is formed on the base 11, which serves to reduce weight and avoid interference with other structures. A positioning support ring is formed on the base 11 (usually integrally molded, the same below), adjacent to the aforementioned hollow structure, and can be opened or closed. Specifically, the positioning support ring includes a lower semicircular support 12 formed on the base 11 and an upper semicircular support 14 pivotally connected to and cooperating with the lower semicircular support 12. The lower semicircular support 12 and the upper semicircular support 14 have two mating portions, one of which is their pivotal connection point, and the other is the opening / closing portion of the positioning support ring. There are multiple sets of positioning rod assemblies 15, which are installed on the positioning support ring seat and are equally spaced, typically extending from the outside of the positioning support ring seat towards its center. Each set of positioning rod assemblies 15 includes at least a positioning rod seat 151 formed on the outer circumferential surface of the positioning support ring seat (its extension direction is consistent with the radial direction of the positioning support ring seat), a positioning rod 152 adjustablely installed in the positioning rod seat 151 (the adjustable method can adopt existing conventional methods, such as the positioning rod seat 151 having an internal thread and the positioning rod 152 having a matching external thread, thereby realizing the threaded connection between the positioning rod 152 and the positioning rod seat 151), and a positioning roller 153 installed at the inner end of the positioning rod 152 (i.e., the end of the positioning rod 152 pointing towards the center of the positioning support ring seat). It should be noted that the positioning roller 153 is rotatably installed at the inner end of the positioning rod 152, and the rotatability can adopt existing conventional methods, such as installation in a pivot manner. In this embodiment, there are three sets of positioning rods 15, so that the included angle between two adjacent positioning rod sets 15 is approximately 120°.

[0019] The auxiliary sleeve 2 is held at the center by multiple sets of positioning rods 15 and is used to fit onto the square tube. In this embodiment, as... Figure 2As shown, the auxiliary sleeve 2 includes a cylindrical sleeve body 21, a square hole 22 opened at the center of the sleeve body 21 and concentric with it (the size of the square hole 22 matches the square tube; multiple auxiliary sleeves 2 of different sizes can be matched to accommodate the clamping or fitting of square tubes of different sizes), and multiple locking screws 24 adjustablely installed on the circumference of the sleeve body 21. That is, multiple through holes are opened on the circumference of the sleeve body 21, and locking screws 24 are installed in these through holes. When a square tube of the corresponding size is inserted into the square hole 22, the multiple locking screws 24 can be adjusted to lock for auxiliary limiting, so as to avoid relative displacement between the square tube and the square hole 22 during the machining process. The auxiliary sleeve 2 also includes a reinforcing convex ring 23 encircling the circumference of the sleeve body 21, with multiple locking screws 24 located on both sides of the reinforcing convex ring 23, so that the outer surface of the reinforcing convex ring 23 contacts multiple positioning rollers 153; the position of the axis of the square tube can be controlled by precisely controlling the roundness and surface smoothness of the reinforcing convex ring 23, thereby improving the precision of machining.

[0020] In this embodiment, a protrusion 141 is formed on the outer surface of the opening of the upper semicircular support 14 (i.e., the non-pivotal connection between the upper semicircular support 14 and the lower semicircular support 12). A limiting clearance groove is formed on the outer surface of the protrusion 141. A clearance groove 121 is provided at the opening of the lower semicircular support 12. A limiting bolt 123 that mates with the aforementioned limiting clearance groove is pivotally connected in the clearance groove 121. A fastening nut 122 that mates with the protrusion 141 is installed at the outer end of the limiting bolt 123. In use, the limiting bolt 123 is manually rotated until it enters the limiting clearance groove, and the fastening nut 122 is rotated until it is firmly locked on the protrusion 141. At this time, the limiting bolt 123 will not fall out of the limiting clearance groove.

[0021] In this embodiment, each positioning rod assembly 15 further includes a connector 155 installed on the outer end of the positioning rod 152 and cooperating with the positioning rod seat 151, and a locking bolt 154 that is adjustable (rotatable, usually a conventional threaded connection) inserted into the side of the positioning support ring seat and cooperating with the positioning rod 152. During machining, the positioning rod assembly 15 may loosen due to vibration, resulting in a decrease in clamping force and clamping accuracy. Therefore, the connector 155 can be installed on the outer end of the positioning rod 152 in a detachable manner (such as a threaded connection), and the connector 155 can be snapped into the positioning rod seat 151 and locked in place by the thread of the locking bolt 154 to limit the vibration of the positioning rod 152. The limiting mechanism 1 also includes a track clamping plate (not shown in the figure) located below the base 11 and a locking bolt 13 connecting the track clamping plate and the base 11.

[0022] Specifically, the machining equipment (i.e., the processing device) is usually a conventional one (such as a lathe, machining center, etc.), and it is equipped with a feeding track assembly 1' located on one side and placed on the ground. The feeding track assembly 1' includes a feeding slide rail frame and multiple support frames installed on the bottom surface of the feeding slide rail. The feeding slide rail frame includes a first track 11' and a second track 13' that are parallel to each other and spaced apart. The inner side of the first track 11' (usually the inner side of the upper surface, the same below) forms a first groove 12', and the inner side of the second track 13' forms a slide rail 14' with an angular cross section (the upper surface of the second track 13' also forms a groove 15' on the outer side of the slide rail 14' to cooperate with the bottom of the base 11). The aforementioned track clamping plate is located below the first track 11' and the second track 13'. The connection force between the track clamping plate and the base 11 can be adjusted by tightening the locking bolt 13, thereby adjusting the sliding friction force of the base 11 on the feeding track assembly 1'.

[0023] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A clamping assembly for machining square tubes, characterized in that, It includes: The limiting mechanism (1) includes a base (11), a positioning support ring seat formed on the base (11) and openable and closable, and multiple sets of positioning rods (15) installed on the positioning support ring seat and equally spaced apart; the positioning support ring seat includes a lower semi-circular support seat (12) formed on the base (11) and an upper semi-circular support seat (14) pivotally connected to and cooperating with the lower semi-circular support seat (12); each set of positioning rods (15) includes at least a positioning rod seat (151) formed on the outer circumferential surface of the positioning support ring seat, a positioning rod (152) adjustablely installed in the positioning rod seat (151), and a positioning roller (153) installed at the inner end of the positioning rod (152); An auxiliary sleeve (2) is held at the center by multiple sets of positioning rods (15) and is used to fit onto the square tube.

2. The square tube machining clamping assembly according to claim 1, characterized in that: A protrusion (141) is formed on the outer surface of the opening of the upper semicircular support (14), and a limit clearance groove is provided on the protrusion (141); a clearance groove (121) is provided at the opening of the lower semicircular support (12), and a limit bolt (123) that cooperates with the limit clearance groove is pivotally connected in the clearance groove (121), and a fastening nut (122) that cooperates with the protrusion (141) is installed on the outer end of the limit bolt (123).

3. The square tube machining clamping assembly according to claim 1, characterized in that: Each of the positioning rod groups (15) further includes a connector (155) installed on the outer end of the positioning rod (152) and cooperating with the positioning rod seat (151) and a locking bolt (154) adjustablely inserted on the side of the positioning support ring seat and cooperating with the positioning rod (152).

4. The square tube machining clamping assembly according to claim 1, characterized in that: The auxiliary sleeve (2) includes a cylindrical sleeve body (21), a square hole (22) opened at the center of the sleeve body (21) and concentric therewith, and a plurality of locking screws (24) adjustablely mounted on the circumference of the sleeve body (21), the size of the square hole (22) matching that of the square tube.

5. The square tube machining clamping assembly according to claim 4, characterized in that: The auxiliary sleeve (2) also includes a reinforcing convex ring (23) arranged around the circumference of the sleeve body (21), and a plurality of locking screws (24) are located on both sides of the reinforcing convex ring (23).

6. The square tube machining clamping assembly according to claim 1, characterized in that: The limiting mechanism (1) also includes a track clamping plate located below the base (11) and a locking bolt (13) connecting the track clamping plate and the base (11).

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