A high-precision profile cutting and positioning device

Abstract

This utility model discloses a high-precision profile cutting positioning device, belonging to the field of cutting positioning technology. It includes a positioning device and a profile cutting machine. The base of the profile cutting machine is fitted with a mounting frame. The mounting frame has a long guide rail on the discharge end side. One end of the rotating shaft between the cutting head and the base is connected to a take-up drum, on which a cable is mounted. The support frame of the positioning device slides on the long guide rail. A positioning plate is fitted onto a guide rod on the support frame. The guide rod rotates axially to create a torsion groove for the positioning plate to rotate 90 degrees. The positioning plate slides along the groove via a linkage pin embedded in the torsion groove. An elastic reset element is provided between the positioning plate and the support frame, and the device is linked to the take-up drum via a cable. This device solves the safety hazards and accuracy problems existing in the positioning devices of existing small aluminum profile cutting machines, meeting the safety positioning and accuracy requirements of non-fully automatic small aluminum profile cutting machines.

Description

Technical Field

[0001] This utility model relates to the field of cutting and positioning technology, and in particular to a high-precision profile cutting and positioning device. Background Technology

[0002] Currently, the feed end of non-fully automatic small aluminum profile cutting machines is generally located on the left side of the equipment. The positioning device on the right side poses a safety hazard at the moment of profile cutting: the profile may bounce away due to stress release or jam the saw blade due to sudden position change. In the existing solutions, the pneumatic positioning device drives the positioning stop part away from the profile during cutting through the cylinder. Although it can avoid the risk of bounce and saw jamming, it increases the number of pneumatic components and other parts, which increases the manufacturing cost. A few devices that use a pull-wire linkage mechanism drive the stop part to slide sideways through the pull wire when cutting and pressing down. This solution has a simple structure and better cost control.

[0003] However, the following shortcomings of the pull-wire linkage mechanism have been exposed in practical applications: First, the positioning device generates significant frictional resistance with the profile surface during lateral movement, causing the profile positioning reference to shift during the cutting process and affecting the dimensional accuracy of the cut. Second, metal debris generated during cutting tends to accumulate in the gap between the positioning plate and the guide rail, causing long-term wear on the working surface of the guide rail and resulting in deterioration of the guiding accuracy. Third, the positioning device connection and the guide rod are connected by a rigid sliding pair, which will wear down the scale markings on the guide rod surface during frequent reciprocating motion, leading to blurred dimensional reference and material cutting deviation. Furthermore, the gap of the connection pair will affect the positioning error. Therefore, designers need to design a cutting positioning device for small aluminum profile cutting machines that meets the requirements of safe positioning and accuracy. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a high-precision profile cutting positioning device that solves the problem of frictional resistance caused by the lateral movement of the positioning plate in traditional wire-linked mechanisms, thereby meeting the safety positioning and accuracy requirements of non-fully automatic small aluminum profile cutting machines.

[0005] The technical solution of this utility model is as follows:

[0006] A high-precision profile cutting and positioning device includes a positioning device and a profile cutting machine. The profile cutting machine includes a cutting head and a base. The base is fitted with a mounting frame. A long guide rail is welded to the mounting frame on the discharge end side of the profile cutting machine. One end of the rotating shaft between the cutting head and the base is connected to a take-up drum. The take-up drum is provided with a mounting ring. A cable (such as a flexible transmission component like a bicycle brake cable) is installed inside the mounting ring. A cable positioning bracket is provided on the mounting frame near the rear end of the take-up drum.

[0007] The positioning device includes a support frame that slides on the long guide rail, a guide rod on the support frame, a positioning plate sleeved on the guide rod, and a torsion groove for the positioning plate to rotate 90 degrees along the axial direction of the guide rod. The positioning plate slides along the torsion groove through a linkage pin embedded in the torsion groove. An elastic reset member is provided between the positioning plate and the support frame. The positioning plate is linked to the take-up drum through the pull cable, forming a linkage control mechanism between the cutting action and the positioning device.

[0008] During cutting, the cutting head moves downward, causing the take-up drum to wind the cable, pulling the positioning plate to slide along the torsion groove of the guide rod and rotate 90 degrees. The positioning plate changes from a vertical blocking state to a horizontal avoidance state. This positioning method replaces the traditional lateral sliding with rotation, reducing the frictional resistance when the traditional blocking part moves laterally, reducing the probability of profile positioning reference offset due to friction, and ensuring cutting accuracy. After cutting, the cutting head resets, causing the take-up drum to release the cable. The elastic reset component in the tensioned state pulls the positioning plate to slide and rotate in the opposite direction, causing the positioning plate to change from a horizontal avoidance state to a vertical blocking state.

[0009] Furthermore, a scale is screwed onto the upper surface of the elongated guide rail. The initial marking on the scale is offset from the positioning plate. A scale reading auxiliary device is provided at one end of the support frame near the mounting frame. The scale reading auxiliary device does not contact the scale and moves synchronously with the support frame. The front end of the scale reading auxiliary device is aligned with the marking on the scale, which avoids wear on the marking on the guide rod surface caused by the rigid sliding connection between the positioning device connection part and the elongated guide rod, and prevents material cutting size deviation caused by blurred scale markings.

[0010] Furthermore, the top contact surface between the support frame and the long guide rail is provided with two sets of top rollers, which are symmetrically arranged on both sides of the width direction of the long guide rail. Each set of top rollers includes at least two rollers spaced apart along the length direction of the long guide rail. The side contact surface between the support frame and the long guide rail is provided with two sets of side rollers, which are symmetrically arranged on both sides of the long guide rail. Each set of side rollers includes at least two rollers spaced apart along the length direction of the long guide rail. The support frame and the long guide rail form rolling support through multiple sets of rollers.

[0011] Furthermore, the guide rod has a torsion groove at one end near the cable. The torsion groove extends axially and is helically bent at 90 degrees around the axis of the guide rod. The end of the torsion groove away from the cable is located at the top of the guide rod, and the other end is located on the side. The radial angle between the two ends is 90 degrees.

[0012] Furthermore, the lower part of the end of the positioning plate away from the cable is provided with a rotation avoidance notch, which is used to avoid the rotational movement path of the positioning plate during profile cutting and to prevent interference.

[0013] Furthermore, the positioning plate is provided with a through hole, in which the linkage pin is installed. A ball is embedded in one end of the linkage pin near the torsion groove. The ball rolls in contact with the bottom of the torsion groove, converting the sliding friction between the positioning plate and the guide rod into rolling friction, reducing the wear problem of the working surface, and maintaining good guiding accuracy even after long-term use.

[0014] Furthermore, the upper part of the linkage pin has an integrated connecting seat for the cable and the elastic reset component. An annular mounting groove is provided on one radial side for fixing the cable, and the boss end on the other side is used to sleeve the elastic reset component, thereby reducing the number of parts and lowering production costs.

[0015] Furthermore, a roller brake assembly is provided at the end of the support frame away from the mounting frame. The roller brake assembly includes a mounting seat on the upper surface of the support frame. A brake plate for pressing the roller is installed in the mounting seat. The brake plate is V-shaped, with one end connected to the upper surface inside the mounting seat and the other end pointing downward and extending towards the roller. A cam-shaped brake pedal is hinged above the brake plate in the mounting seat. The brake pedal with the cam structure drives the brake plate to press the roller, quickly locking the position of the support frame and ensuring that there is no displacement when the positioning plate is clamped. After the pedal is released, the brake plate automatically resets, which is convenient for readjustment.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The positioning plate of this utility model achieves 90-degree rotation by sliding along the torsion groove through the linkage pin. During cutting, the cable linkage winding drum drives the positioning plate to rotate and avoid the obstacle. With the help of the elastic reset component, it resets the plate, avoiding the safety hazard of the profile flying away due to stress release or sudden position change and getting stuck on the saw blade. At the same time, it solves the problem that the traditional stop part generates a large frictional resistance with the surface of the profile when it moves laterally, which causes the positioning reference of the profile to shift during the cutting process and affects the cutting accuracy.

[0018] 2. This utility model, by setting top rollers and side rollers on the contact surface between the support frame and the long guide rail, changes the sliding friction between the support frame and the guide rail to rolling friction, which greatly reduces the frictional resistance during lateral movement, avoids wear on the scale markings on the guide rod surface, and avoids the positioning error caused by the gap between the support frame and the long guide rail.

[0019] 3. This utility model has a ball embedded at one end of the linkage pin near the torsion groove. The ball rolls in contact with the bottom of the torsion groove, which converts the sliding friction between the positioning plate and the guide rod into rolling friction, reducing the wear problem of the working surface and maintaining good guiding accuracy even after long-term use.

[0020] 4. This utility model offsets the scale marking on the upper end face of the long guide rail with the positioning plate as the starting point. The end of the support frame near the mounting frame is equipped with a scale reading auxiliary device that does not contact the scale. This avoids the wear of the scale marking on the guide rod surface caused by the rigid sliding pair connection between the positioning device connection part and the guide rod, ensuring clear scale reference and preventing material cutting size deviation caused by blurred scale marking.

[0021] 5. This utility model provides a roller brake assembly at the end of the support frame away from the mounting frame. The roller can be easily pressed by the cam-shaped brake pedal, which can quickly fix the position of the support frame and make the operation convenient. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0024] Figure 3 This is a left top view of the installation structure of the positioning device of this utility model.

[0025] Figure 4 This is a top-right view of the installation structure of the positioning device of this utility model.

[0026] Figure 5 This is an exploded view of the positioning plate and guide rod of this utility model.

[0027] Figure 6 This is a schematic diagram of the linkage pin structure of this utility model.

[0028] Figure 7 This is a schematic diagram of the roller brake assembly of this utility model.

[0029] Reference numerals in the attached drawings: 1. Positioning device; 1-1. Support frame; 1-2. Guide rod; 1-2.1. Torsion groove; 1-3. Positioning plate; 1-3.1. Linkage pin; 1-3.1.1. Ball bearing; 1-3.1.2. Integrated connecting seat for cable and elastic reset component; 1-4. Elastic reset component; 1-5. Scale reading auxiliary device; 1-6. Roller; 2. Profile cutting machine; 2-1. Cutting head; 2-2. Base; 3. Mounting bracket; 3-1. Long guide rail; 4. Winding drum; 5. Cable; 6. Roller brake assembly; 6-1. Mounting seat; 6-2. Brake plate; 6-3. Brake pedal. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] like Figures 1 to 7 As shown, a high-precision profile cutting and positioning device includes a positioning device 1 and a profile cutting machine 2. The profile cutting machine 2 includes a cutting head 2-1 and a base 2-2. A mounting frame 3 is fitted on the outer side of the base 2-2. A long guide rail 3-1 is welded to the discharge end side of the mounting frame 3. One end of the rotating shaft between the cutting head 2-1 and the base 2-2 is connected to a take-up drum 4. A mounting ring is provided on the take-up drum 4. A cable 5 (such as a flexible transmission component like a bicycle brake cable) is installed inside the mounting ring. A cable positioning bracket is provided at the rear end of the mounting frame 3 near the take-up drum 4.

[0032] The positioning device 1 includes a support frame 1-1 that slides on a long guide rail 3-1. The support frame 1-1 has a guide rod 1-2. A positioning plate 1-3 is sleeved on the guide rod 1-2. The guide rod 1-2 has a torsion groove 1-2.1 that rotates 90 degrees along the axial direction for the positioning plate 1-3 to rotate. The positioning plate 1-3 slides along the torsion groove 1-2.1 through a linkage pin 1-3.1 embedded in the torsion groove 1-2.1. An elastic reset member 1-4 is provided between the positioning plate 1-3 and the support frame 1-1. The positioning plate 1-3 is linked to the take-up drum 4 through a pull cable 5, forming a linkage control mechanism between the cutting action and the positioning device 1.

[0033] During cutting, the cutting head 2-1 moves downward, causing the take-up drum 4 to wind the cable 5, pulling the positioning plate 1-3 to slide and rotate 90 degrees along the torsion groove 1-2.1 of the guide rod 1-2. The positioning plate 1-3 changes from a vertical blocking state to a horizontal avoidance state. This positioning method replaces the traditional lateral sliding with rotation, reducing the frictional resistance when the traditional blocking part moves laterally, reducing the probability of profile positioning reference offset due to friction, and ensuring cutting accuracy. After cutting, the cutting head 2-1 resets, causing the take-up drum 4 to release the cable 5. The elastic reset part 1-4 in the tensioned state pulls the positioning plate 1-3 to slide and rotate in the opposite direction, so that the positioning plate 1-3 changes from a horizontal avoidance state to a vertical blocking state.

[0034] Furthermore, a scale is screwed onto the upper surface of the long guide rail 3-1. The initial marking on the scale is offset from the positioning plate 1-3. A scale reading auxiliary device 1-5 is provided at one end of the support frame 1-1 near the mounting frame 3. The scale reading auxiliary device 1-5 does not contact the scale. The scale reading auxiliary device 1-5 moves synchronously with the support frame 1-1. The front end of the scale reading auxiliary device 1-5 is aligned with the marking on the scale, which avoids wear on the marking on the scale surface of the guide rod due to the rigid sliding connection between the connecting part of the positioning device 1 and the long guide rod, and prevents material cutting size deviation caused by blurred scale markings.

[0035] Furthermore, the top contact surface between the support frame 1-1 and the long guide rail 3-1 is provided with two sets of top surface rollers 1-6. The two sets of top surface rollers 1-6 are symmetrically arranged on both sides of the long guide rail 3-1 in the width direction. Each set of top surface rollers 1-6 includes at least two rollers 1-6 spaced apart along the length direction of the long guide rail 3-1. The side contact surface between the support frame 1-1 and the long guide rail 3-1 is provided with two sets of side rollers 1-6. The two sets of side rollers 1-6 are symmetrically arranged on both sides of the long guide rail 3-1. Each set of side rollers 1-6 includes at least two rollers 1-6 spaced apart along the length direction of the long guide rail 3-1. The support frame 1-1 and the long guide rail 3-1 form rolling support through multiple sets of rollers 1-6.

[0036] Furthermore, the guide rod 1-2 is provided with a torsion groove 1-2.1 at one end near the cable 5. The torsion groove 1-2.1 extends axially and is helically bent at 90 degrees around the axis of the guide rod 1-2. The end of the torsion groove 1-2.1 away from the cable 5 is located at the top of the guide rod 1-2, and the other end is located on the side. The radial angle between the two ends is 90 degrees.

[0037] Furthermore, the lower part of the end of the positioning plate 1-3 away from the cable 5 is provided with a rotation avoidance notch. The rotation avoidance notch is used to avoid the rotational movement path of the positioning plate 1-3 during profile cutting to prevent interference.

[0038] Furthermore, the positioning plate 1-3 is provided with a through hole, in which a linkage pin 1-3.1 is installed. A ball bearing 1-3.1.1 is embedded at the end of the linkage pin 1-3.1 near the torsion groove 1-2.1. The ball bearing 1-3.1.1 makes rolling contact with the bottom of the torsion groove 1-2.1, converting the sliding friction between the positioning plate 1-3 and the guide rod 1-2 into rolling friction, reducing the wear problem of the working surface, and maintaining good guiding accuracy even after long-term use.

[0039] Furthermore, the upper part of the linkage pin 1-3.1 has an integrated connecting seat 1-3.1.2 for the cable and the elastic reset component. One radial side of the connector has an annular mounting groove for fixing the cable 5, and the other side has a boss end for sleeved with the elastic reset component 1-4, which reduces the number of parts and lowers production costs.

[0040] Furthermore, a roller brake assembly 6 is provided at the end of the support frame 1-1 away from the mounting frame 3. The roller brake assembly 6 includes a mounting seat 6-1 located on the upper surface of the support frame 1-1. A brake plate 6-2 for pressing the roller 1-6 is installed inside the mounting seat 6-1. The brake plate 6-2 is V-shaped, with one end connected to the upper surface inside the mounting seat 6-1 and the other end extending downwards and toward the roller 1-6. A cam-shaped brake pedal 6-3 is hinged above the brake plate 6-2 inside the mounting seat 6-1. The brake plate 6-2 is driven by the cam-structured brake pedal 6-3 to press the roller 1-6, quickly locking the position of the support frame 1-1 and ensuring that the positioning plate 1-3 is not displaced when clamped. After the pedal is released, the brake plate 6-2 automatically resets, making it easy to readjust its position.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision profile cutting positioning device, comprising a positioning device and a profile cutting machine, the profile cutting machine comprising a cutting head and a base, characterized in that, The base is fitted with a mounting frame, and the mounting frame is provided with a long guide rail on the discharge end side of the profile cutting machine. One end of the rotating shaft between the cutting head and the base is connected to a take-up drum, and a pull cable is provided on the take-up drum. The positioning device includes a support frame that slides on the long guide rail. The support frame has a guide rod, and a positioning plate is sleeved on the guide rod. The guide rod has a torsion groove for rotating the positioning plate by 90 degrees. The torsion groove is a spiral bending structure that extends along the axial direction of the guide rod and is about its axis. The positioning plate slides along the torsion groove through a linkage pin embedded in the torsion groove. An elastic reset member is provided between the positioning plate and the support frame. The positioning plate is linked to the take-up drum through the cable.

2. The high-precision profile cutting and positioning device according to claim 1, characterized in that, The mounting bracket is equipped with a cable positioning bracket near the rear end of the take-up drum.

3. The high-precision profile cutting and positioning device according to claim 1, characterized in that, The upper surface of the long guide rail is provided with a scale, and the markings on the scale are offset from the positioning plate.

4. The high-precision profile cutting and positioning device according to claim 1, characterized in that, The bearing frame has two sets of top rollers on the contact surface between the top surface of the support frame and the long guide rail. The two sets of top rollers are symmetrically arranged on both sides of the width direction of the long guide rail. Each set of top rollers includes at least two rollers spaced apart along the length direction of the long guide rail. The bearing frame has two sets of side rollers on the contact surface between the side surface of the support frame and the long guide rail. The two sets of side rollers are symmetrically arranged on both sides of the long guide rail. Each set of side rollers includes at least two rollers spaced apart along the length direction of the long guide rail.

5. The high-precision profile cutting and positioning device according to claim 1, characterized in that, The guide rod has a torsion groove at one end near the cable. The torsion groove extends axially and is helically bent at 90 degrees around the axis of the guide rod. One end of the torsion groove is located at the top of the guide rod, and the other end is located on the side. The radial angle between the two ends is 90 degrees.

6. The high-precision profile cutting and positioning device according to claim 1, characterized in that, The positioning plate has a rotation avoidance notch at the end away from the cable.

7. The high-precision profile cutting and positioning device according to claim 1, characterized in that, The positioning plate is provided with a through hole, and the linkage pin is installed in the through hole. A ball is embedded in one end of the linkage pin near the torsion groove, and the ball rolls in contact with the bottom of the torsion groove.

8. A high precision profile cutting positioning device according to claim 7, characterized in that, The upper part of the linkage pin has an integrated connecting seat for the cable and the elastic reset component. One radial side is provided with an annular mounting groove for fixing the cable, and the other side has a boss end for sleeved with the elastic reset component.

9. A high precision profile cutting positioning device according to claim 3, characterized in that, The support frame is provided with a ruler reading auxiliary device at one end near the mounting frame, and the ruler reading auxiliary device does not contact the ruler.

10. The high-precision profile cutting and positioning device according to claim 1, characterized in that, The bearing frame is provided with a roller brake assembly at one end away from the mounting frame. The roller brake assembly includes a mounting seat on the upper surface of the bearing frame, a brake plate for pressing the roller is provided in the mounting seat, and a cam-shaped brake pedal is hinged above the brake plate in the mounting seat.

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