A numerical control milling machine auxiliary device for processing a traction frame

Abstract

The application discloses a numerical control milling machine auxiliary device for processing a traction frame, which comprises at least two parallelly arranged supporting plates, supporting blocks fixed to the lower surfaces of the supporting plates, and a frame placed on the supporting plates, a first positioning pin, a second positioning pin arranged on the upper surface of the supporting plate in parallel with the first positioning pin to cooperate with the frame and position the frame, a positioning assembly arranged on the other end of the upper surface of the supporting plate to abut against the frame and limit the frame, and a supporting pipe fixed to one side wall of the supporting plate. The numerical control milling machine auxiliary device forms a stable supporting base by the supporting plates and the supporting blocks, realizes quick positioning by cooperation of the first positioning pin and the second positioning pin arranged in parallel with the frame, abuts against and limits the side surface of the frame by the positioning screw rod in the positioning assembly, cooperates with the adjustable pressing structure formed in the pressing and fixing assembly, and reliably presses and fixes the frame on the supporting plate, so that the frame is accurately positioned and stably clamped during milling, and the device has simple structure and is convenient to operate.

Description

Technical Field

[0001] This invention specifically relates to an auxiliary device for CNC milling machines used in machining traction frames. Background Technology

[0002] In the wire and cable industry, tracked traction machines are used to smoothly drag cables from the unloading end to the take-up end on the production line. The frame, as a core component of the transmission and tensioning systems, directly affects the overall operating accuracy and stability of the machine. The frame blank is a welded part. Key machining elements include the bearing cap mounting surfaces and bearing holes on the front and back, the tensioning shaft hole boss surface and tensioning shaft hole, the clamping cylinder mounting surface and bolt holes, and the frame bottom surface. Parallelism must be ensured between the upper and lower bearing holes, between the upper and lower tensioning wheel shaft holes, and between the bearing holes and tensioning wheel shaft holes. Perpendicularity must be ensured between the clamping cylinder mounting surface and each hole. Coaxiality is required between the tensioning shaft holes and bearing holes on the front and back. Strict parallelism and distance tolerances are also required between the frame bottom surface and each hole.

[0003] Due to the complex structure and large size of the machine frame, traditional milling machines usually require multiple clamping and flipping operations to complete the milling and boring of the front, back and bottom surfaces. This not only makes clamping difficult and time-consuming, but also easily introduces cumulative positioning errors due to multiple positioning operations. Especially when machining the back hole system, if a long tool is used for through machining, it is easy to cause tool vibration, which in turn affects the surface quality and dimensional accuracy of the hole wall. Therefore, we propose a CNC milling machine auxiliary device for machining traction frames. Summary of the Invention

[0004] The purpose of this invention is to provide an auxiliary device for CNC milling machines that processes traction frames, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary device for CNC milling machines that processes traction frames, comprising:

[0006] At least two support plates arranged side by side, with support blocks fixed to the lower surface of the support plates, and a frame placed on the support plates;

[0007] First positioning pin;

[0008] The second positioning pin is arranged side by side with the first positioning pin on the upper surface of the support plate to cooperate with the frame and position the frame.

[0009] A positioning component is disposed on the other end of the upper surface of the support plate to abut against the frame and limit its position.

[0010] A branch pipe is fixed to one side wall of the support plate, and the branch pipe has a clamping assembly for clamping the frame onto the support plate.

[0011] Preferably, the positioning component includes a fixing block and a positioning screw. The fixing block is fixed to one end of the upper surface of the support plate, and the positioning screw is connected to the inner side of the fixing block through a threaded portion, with one end of the positioning screw abutting against the frame.

[0012] Preferably, the fixing block is perpendicular to the support plate, and the fixing block is fixed to the support plate by bolts.

[0013] Preferably, the clamping assembly includes a threaded rod, a top rod, a pressure plate, and a limiting nut. The threaded rod and the top rod are arranged side by side on the branch pipe. The pressure plate is fitted onto the upper end of the outer surface of the threaded rod to clamp the frame. The threaded rod is connected to a limiting nut that abuts against the pressure plate via a threaded portion.

[0014] Preferably, an adjustment groove is provided on the inner side of the pressure plate along its long side, and the pressure plate and the threaded rod cooperate through the adjustment groove.

[0015] Preferably, the top rod is welded and fixed to the branch pipe, and the length of the top rod is less than the length of the threaded rod.

[0016] Preferably, the positioning components are provided in four locations, and the four positioning components are evenly distributed on adjacent sides of the frame.

[0017] Preferably, the first locating pin has a cylindrical cross-section, and the second locating pin has a rhomboid cross-section.

[0018] Preferably, the support plate is rectangular, and the ends of the support plate have chamfers.

[0019] Preferably, the clamping assembly is provided in four locations, with each pair of clamping assemblies symmetrically distributed along the center of the long side of the frame.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention utilizes support plates and blocks to form a stable support foundation. A first and second positioning pin, arranged side-by-side, work in conjunction with the machine frame to achieve rapid positioning. Simultaneously, positioning screws in the positioning assembly provide contact and limitation to the side of the machine frame. Combined with an adjustable clamping structure in the clamping assembly, the machine frame is reliably clamped onto the support plate. This ensures accurate positioning and stable clamping of the machine frame during milling, and the device is simple in structure and easy to operate. In terms of processing technology, the machining of the front and back of the machine frame is rationally divided into two processes, which reduces the accumulation of positioning tolerances caused by clamping changes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the compression assembly structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the first positioning pin structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the adjusting groove structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the first positioning pin installation structure of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the second locating pin of the present invention.

[0028] In the diagram: 1. Frame; 2. Support block; 3. Support plate; 4. Positioning assembly; 41. Fixing block; 42. Positioning screw; 5. Support pipe; 6. Pressing assembly; 61. Threaded rod; 62. Top rod; 63. Pressure plate; 631. Adjustment groove; 64. Limit nut; 8. First positioning pin; 81. Connecting bolt; 9. Second positioning pin. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-6 The present invention provides a technical solution: an auxiliary device for CNC milling machines that processes traction frames, comprising:

[0031] At least two side-by-side support plates 3, with support blocks 2 fixed to the lower surface of the support plates 3, and a frame 1 placed on the support plates 3;

[0032] First positioning pin 8;

[0033] The second positioning pin 9 is arranged side by side with the first positioning pin 8 on the upper surface of the support plate 3 to cooperate with the frame 1 and position the frame 1.

[0034] Positioning component 4 is disposed on the other end of the upper surface of support plate 3 to abut against frame 1 and limit frame 1;

[0035] Branch pipe 5 is fixed to one side wall of support plate 3, and branch pipe 5 has a clamping assembly 6 that clamps frame 1 onto support plate 3;

[0036] By setting at least two parallel support plates 3 and support blocks 2 to form a stable support foundation, and by setting a first positioning pin 8 and a second positioning pin 9 side by side on the upper surface of the support plate 3 to cooperate with the reference holes on the frame 1, the frame 1 can be quickly and accurately positioned initially. At the same time, the positioning component 4 set at the other end of the support plate 3 is used to abut and limit the side of the frame 1 to prevent it from moving horizontally. Furthermore, the support pipe 5 and the clamping component 6 set on it are used to press the frame 1 from top to bottom onto the support plate 3, so that the frame 1 can be reliably fixed during the milling process, effectively suppressing the processing vibration and workpiece displacement, thereby ensuring the dimensional accuracy and form and position tolerance of each processing surface and hole system of the frame 1. Moreover, the overall structure of the device is simple and the clamping operation is convenient, which is conducive to improving the milling efficiency and quality stability of the tracked traction machine frame.

[0037] Preferably, the positioning component 4 includes a fixing block 41 and a positioning screw 42. The fixing block 41 is fixed to one end of the upper surface of the support plate 3, and the positioning screw 42 is connected to the inner side of the fixing block 41 through a threaded part, and one end of the positioning screw 42 abuts against the frame 1.

[0038] The axial extension and retraction adjustment of the positioning screw 42 is achieved by using threaded transmission, which allows the operator to manually rotate the positioning screw 42 according to the actual placement position of the frame 1, so that its end precisely abuts against the side of the frame 1, thereby forming an adjustable limit on the frame 1 in the horizontal direction. This improves the adaptability of the positioning component 4 to different batches or frames 1 with slight dimensional deviations, and ensures the accuracy and consistency of positioning during each clamping.

[0039] Preferably, the fixing block 41 is perpendicular to the support plate 3, and the fixing block 41 is fixed to the support plate 3 by bolts.

[0040] This ensures that the axial thrust direction of the positioning screw 42 is perpendicular to the side contact surface of the frame 1, avoiding uneven force distribution on the frame 1 or bending deformation of the positioning screw 42 due to angular deviation. At the same time, the bolt connection method facilitates the disassembly and fine-tuning of the fixing block 41, enhancing the structural rigidity of the positioning component 4 and its long-term reliability.

[0041] Preferably, the clamping assembly 6 includes a threaded rod 61, a top rod 62, a pressure plate 63, and a limiting nut 64. The threaded rod 61 and the top rod 62 are arranged side by side on the branch pipe 5. The pressure plate 63 is fitted onto the upper end of the outer surface of the threaded rod 61 to clamp the frame 1. The threaded rod 61 is connected to the limiting nut 64, which abuts against the pressure plate 63, through a threaded part.

[0042] By rotating the limiting nut 64 that is threaded to the threaded rod 61, the pressure plate 63 can be driven to move down to press the frame 1 or move up to release the frame 1. The push rod 62 provides a support point for the pressure plate 63 during the pressing process, so that the pressure plate 63 can still maintain balance when subjected to force on one side, thereby fixing the frame 1 firmly to the support plate 3 with a stable and uniform pressing force, preventing the frame 1 from lifting or tilting under the action of milling force.

[0043] Preferably, an adjustment groove 631 is provided on the inner side of the pressure plate 63 along its long side, and the pressure plate 63 and the threaded rod 61 cooperate through the adjustment groove 631;

[0044] This allows the pressure plate 63 to slide and adjust its position relative to the threaded rod 61 along its own length, thereby adapting to the needs of different width dimensions or different clamping point positions of the frame 1, expanding the applicability of the clamping assembly 6. At the same time, the setting of the adjustment groove 631 allows for quick changes in the clamping position without replacing the pressure plate 63, further improving the versatility and ease of operation of the device.

[0045] Preferably, the push rod 62 is welded and fixed to the branch pipe 5, and the length of the push rod 62 is less than the length of the threaded rod 61;

[0046] This reduces the risk of the top rod 62 loosening or tilting during the clamping process; at the same time, it limits the length of the top rod 62 to be less than the length of the threaded rod 61, so that the pressure plate 63 has a certain amount of tilting space in the un-clamped state or the initial assembly state, which makes it easy to quickly install the pressure plate 63 onto or remove it from the threaded rod 61, thereby improving the assembly efficiency and maintenance convenience of the clamping assembly 6.

[0047] Preferably, the positioning components 4 are provided in four locations, and the four positioning components 4 are evenly distributed on adjacent sides of the frame 1;

[0048] It facilitates the effective restriction of the movement and rotation freedom of the frame 1 in the horizontal plane, enhances the positioning stability of the frame 1 in milling, and is especially suitable for preventing workpiece micro-movement when the frame 1 is long and the cutting force is large. It ensures that the positioning reference surface is always in close contact with the positioning component 4 during the machining process, thereby further ensuring the consistency of machining accuracy.

[0049] Preferably, the first locating pin 8 has a cylindrical cross-section, and the second locating pin 9 has a rhomboid cross-section;

[0050] The cylindrical pin constrains two translational degrees of freedom, while the rhomboid pin only constrains one rotational degree of freedom. A compensation gap is left in the direction of its long axis, which can effectively compensate for the manufacturing error of the center distance between the two positioning holes on the frame 1, avoid workpiece clamping difficulties or positioning interference caused by over-positioning, and at the same time ensure the consistency of the positioning reference and the repeatability of positioning accuracy of the frame 1 each time it is clamped.

[0051] Preferably, the support plate 3 is rectangular, and the ends of the support plate 3 have chamfers;

[0052] The rectangular structure facilitates parallel arrangement and position adjustment on the CNC gantry milling machine worktable, ensuring the flatness and parallelism of multiple support plates 3 when they jointly form a plane support for the frame 1; the end chamfer design eliminates sharp edge burrs, preventing operators from being scratched by touching the edge of the support plate 3 during handling or clamping, thus improving the safety and humanization level of the device during use.

[0053] Preferably, the clamping components 6 are provided in four places, and every two clamping components 6 are symmetrically distributed along the center of the long side of the frame 1;

[0054] This facilitates the formation of symmetrical and balanced constraints on the upper surface of the frame 1, effectively preventing the frame 1 from tilting, bending, deforming, or experiencing localized stress concentration due to excessive or unevenly distributed clamping force on one side. It ensures that the frame 1 remains flat and tightly clamped on the support plate 3, thereby providing stable and consistent clamping rigidity for milling and boring operations on the front, back, and bottom surfaces of the frame 1, further improving machining accuracy and surface quality.

[0055] The working principle and usage process of this invention: In order to meet the machining dimensions and geometric tolerance accuracy requirements of the tracked traction machine frame 1 and above, this process achieves the machining of the frame 1 by arranging two operations on a CNC gantry milling machine:

[0056] Process 1: such as Figure 1 As shown, according to the milling machine machining position, manually adjust the position of the positioning screw 42, then place the machine frame 1 face down on the support plate 3. Position the support plate 3 using multiple positioning screws 42 to correct the top surface 212 of the machine frame. Use the first positioning pin 8 and the second positioning pin 9 to align the midpoint of the bearing hole 204. At this time, the midpoint of the tensioning shaft hole 206 is also aligned. Twist the limit nut 64 downwards, causing the limit nut 64 to move the pressure plate 63 downwards. The pressure plate 63 then presses the machine frame 1 onto the support plate 3, thus fixing the machine frame 1, allowing the milling machining of the machine frame 1 to proceed. Process 2: As shown Figure 2 As shown, the frame is placed face down. Similarly, the frame 1 can be pressed and secured on the support plate 3 by the pressure plate 63, so that the frame 1 can be milled again.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for CNC milling machines used for machining traction frames, characterized in that, include: At least two side-by-side support plates (3), with a support block (2) fixed on the lower surface of the support plate (3), and a frame (1) placed on the support plate (3); First positioning pin (8); The second positioning pin (9) is arranged side by side with the first positioning pin (8) on the upper surface of the support plate (3) to cooperate with the frame (1) and position the frame (1); A positioning component (4) is disposed at the other end of the upper surface of the support plate (3) to abut against the frame (1) and limit the frame (1); The branch pipe (5) is fixed to one side wall of the support plate (3), and the branch pipe (5) has a clamping assembly (6) for clamping the frame (1) onto the support plate (3).

2. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 1, characterized in that: The positioning component (4) includes a fixing block (41) and a positioning screw (42). The fixing block (41) is fixed to one end of the upper surface of the support plate (3). The positioning screw (42) is connected to the inside of the fixing block (41) through a threaded part, and one end of the positioning screw (42) abuts against the frame (1).

3. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 2, characterized in that: The fixing block (41) is perpendicular to the support plate (3), and the fixing block (41) and the support plate (3) are fixed by bolts.

4. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 1, characterized in that: The clamping assembly (6) includes a threaded rod (61), a top rod (62), a pressure plate (63), and a limiting nut (64). The threaded rod (61) and the top rod (62) are arranged side by side on the branch pipe (5). The pressure plate (63) is fitted onto the upper end of the outer surface of the threaded rod (61) to clamp the frame (1). The threaded rod (61) is connected to the limiting nut (64) which abuts against the pressure plate (63) through the threaded part.

5. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 4, characterized in that: The pressure plate (63) has an adjustment groove (631) along its long side on the inner side, and the pressure plate (63) and the threaded rod (61) cooperate through the adjustment groove (631).

6. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 4, characterized in that: The top rod (62) is welded and fixed to the branch pipe (5), and the length of the top rod (62) is less than the length of the threaded rod (61).

7. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 1, characterized in that: The positioning component (4) is provided in four places, and the four positioning components (4) are evenly distributed on adjacent sides of the frame (1).

8. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 1, characterized in that: The first positioning pin (8) has a cylindrical cross-section, and the second positioning pin (9) has a rhomboid cross-section.

9. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 1, characterized in that: The support plate (3) is rectangular, and the ends of the support plate (3) have chamfers.

10. The auxiliary device for machining a traction frame of a CNC milling machine according to claim 1, characterized in that: The clamping components (6) are provided in four locations, and the clamping components (6) are symmetrically distributed along the long side center of the frame (1) in every two locations.

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