Positioning structure of numerical control milling machine

Abstract

This utility model provides a positioning structure for a CNC milling machine, belonging to the field of CNC milling machine technology. It includes a machine bed, and further includes a feed mechanism mounted on the machine bed. The machine bed has at least two mounting slots, and a support plate is fixed within each mounting slot. A positioning component is mounted on the support plate, and the positioning component is used to clamp and position the workpiece. The positioning component is particularly suitable for precisely clamping and positioning small workpieces, effectively preventing insufficient machining accuracy. It performs excellently, and its flexibility and reliability make it widely applicable in various machining applications.

Description

Technical Field

[0001] This utility model relates to the field of CNC milling machine technology, and in particular to a positioning structure for a CNC milling machine. Background Technology

[0002] CNC milling machines are mainly composed of a bed, spindle, feed system, CNC system, and cooling system. Based on digital control technology, CNC milling machines use a pre-programmed machining program to control the movement of each axis of the machine tool through the CNC system, thereby driving relative movement between the cutting tool and the workpiece to achieve cutting machining of the workpiece and accurately producing parts with various complex shapes.

[0003] In the current field of CNC milling machines, the design and application of positioning mechanisms is a key technical aspect. Typically, these positioning mechanisms rely on various fixtures to accurately position the workpiece. Once the workpiece is accurately positioned, the next step is to perform cutting processing. However, existing positioning mechanism designs are often quite complex, which not only increases the difficulty of operation but also exposes some problems in practical applications. Especially when processing small-sized workpieces, existing positioning mechanisms are unable to meet the high-precision positioning requirements. This leads to the workpiece being prone to loosening after positioning, resulting in displacement. This displacement directly affects the accuracy of cutting processing, thereby affecting the quality of the final product.

[0004] Chinese patent publication number CN219901266U discloses a positioning device for a CNC milling machine, including a base plate, a fixed frame fixedly installed on the top of the base plate, a cylinder set on the top of the fixed frame, a piston rod connected to the output end of the cylinder, a trapezoidal block fixedly connected to the top of the piston rod, T-shaped sliders fixedly installed on both sides of the trapezoidal block, a round rod fixedly installed on the top of the base plate, a rectangular plate fixedly installed on the top of the round rod, a rectangular groove opened on one side of the rectangular plate, and a rectangular slider slidably connected to one side of the rectangular groove. This invention, through the fixed frame, cylinder, piston rod, trapezoidal block, T-shaped slider, round rod, rectangular plate, rectangular groove, rectangular slider, inclined plate, T-shaped groove, and clamping plate, can quickly position the items to be processed, making positioning more convenient, effectively reducing the time wasted due to inconvenient positioning, improving work efficiency, and facilitating widespread use. While this patent can solve the problem of wasted time during positioning, it is difficult to meet the requirements for high-precision positioning. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a positioning structure for CNC milling machines. The positioning components are particularly suitable for precisely clamping and positioning small workpieces, effectively preventing insufficient machining accuracy. It performs excellently, and its flexibility and reliability make it widely applicable in various machining applications.

[0006] To solve the above-mentioned technical problems, this utility model solves the problem that the current positioning mechanism is complex in design and difficult to operate, especially when processing small-sized workpieces, it is difficult to achieve high-precision positioning, which leads to the workpiece being easy to loosen and shift after positioning, affecting the cutting accuracy and product quality.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A positioning structure for a CNC milling machine includes: a machine bed, and further includes: a feed mechanism provided on the machine bed, at least two mounting slots provided on the machine bed, a bearing plate fixed in the mounting slots, and a positioning component provided on the bearing plate, the positioning component being used to clamp and position the workpiece.

[0009] Preferably, the positioning component includes: a mounting plate fixed to the bottom of the support plate, and the mounting plate being fixed within the mounting groove; at least two hinge seats fixed to the support plate; a positioning rod rotatably connected to each hinge seat; a through hole opened on the mounting plate; a mounting ring fixed to the through hole; a connecting rod slidably passing through the mounting ring; the connecting rod and the positioning rod being hinged together by a mating plate; a movable block fixed to one end of the connecting rod inside the through hole; a return spring a sleeved on the connecting rod; one end of the return spring a fixed to the movable block; the other end of the return spring a fixed to the mounting ring; a channel communicating with the through hole opened on the mounting plate; a transmission plate slidably connected within the channel; a cylinder fixed to the mounting plate by a support plate; the output end of the cylinder fixed to the transmission plate; an inclined groove opened on the transmission plate; and a roller disposed between the through hole and the channel, with the roller slidably connected within the inclined groove.

[0010] Preferably, a rubber post is fixed on one of the adjacent side walls of the two positioning rods, and the central axis of the connecting rod is collinear with the central axis of the through hole.

[0011] Preferably, the two movable blocks are both planar on adjacent sides, the central axis of the movable block is collinear with the central axis of the through hole, and the side wall of the movable block near the roller is a smooth arc surface.

[0012] Preferably, the included angle between the two through holes is a right angle, and the thickness of the transmission plate is the same as the length of the roller.

[0013] Preferably, an mounting plate is fixed between the channel and the two through holes, the mounting plate has a sliding groove, and the roller is slidably connected inside the sliding groove.

[0014] Preferably, the positioning rod is provided with an adjusting component adapted to the docking plate. The adjusting component includes: a cavity on the positioning rod, a limiting rod slidingly passing through the cavity on the positioning rod, a plurality of limiting holes on the docking plate, the limiting holes being adapted to the limiting rod, a connecting ring fixed on the limiting rod and slidably connected to the cavity, and a return spring b sleeved on the limiting rod, one end of the return spring b being fixed to the connecting ring, and the other end of the return spring b abutting against the cavity.

[0015] Preferably, the side wall of the positioning rod near the docking plate is provided with a smooth arc surface, and a pull ring is fixed to the end of the limiting rod away from the limiting hole.

[0016] Preferably, the support plate is circular in shape, and the top surface of the support plate and the top surface of the bed are located on the same horizontal plane.

[0017] Preferably, the bottom surface of the bed is fixed with several anti-slip pads.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model provides a positioning structure for CNC milling machines. Through the setting of positioning components, it is particularly suitable for the precise clamping and positioning of small workpieces. It can effectively avoid the problem of poor processing effect caused by insufficient positioning accuracy when cutting workpieces. Therefore, it performs very well in terms of workpiece positioning effect. Moreover, due to its flexibility and reliability, it has a wide range of applicability in a variety of different processing occasions.

[0020] This utility model provides a positioning structure for a CNC milling machine. By setting the adjustment component, the user can easily adjust the included angle between the positioning rod and the docking plate according to the actual usage needs. This design enables the device to flexibly adapt to workpieces of various sizes and shapes, and to perform effective clamping and positioning work. Its adjustment process is not only highly flexible, but also has a simple structural design, which greatly facilitates the user's operation and improves work efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a side sectional view of the bed body of this utility model;

[0024] Figure 3 This is a partial side sectional view of the present invention;

[0025] Figure 4 for Figure 3 Enlarged schematic diagram of the structure of region A in the middle;

[0026] Figure 5 for Figure 3 Enlarged schematic diagram of the structure of region B in the middle;

[0027] Figure 6 This is a side sectional view of the mounting plate of this utility model;

[0028] Figure 7 for Figure 6 Enlarged structural diagram of region C in the middle.

[0029] Drawing number explanation: 1. Bed; 2. Feed mechanism; 3. Mounting slot; 4. Bearing plate; 5. Positioning assembly; 51. Mounting plate; 52. Hinge seat; 53. Positioning rod; 54. Through hole; 55. Mounting ring; 56. Connecting rod; 57. Butt plate; 58. Movable block; 59. Return spring a; 510. Channel; 511. Transmission plate; 512. Cylinder; 513. Inclined groove; 514. Roller; 6. Rubber column; 7. Addition plate; 8. Slide groove; 9. Adjusting component; 91. Cavity; 92. Limiting rod; 93. Limiting hole; 94. Connecting ring; 95. Return spring b; 10. Pull ring; 11. Anti-slip pad. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0033] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0034] Please see Figure 1 - Figure 7 A positioning structure for a CNC milling machine includes: a bed 1, and further includes: a feed mechanism 2 provided on the bed 1, at least two mounting slots 3 provided on the bed 1, a bearing plate 4 fixed in the mounting slots 3, and a positioning component 5 provided on the bearing plate 4, the positioning component 5 being used to clamp and position the workpiece, and several anti-slip pads 11 fixed on the bottom surface of the bed 1.

[0035] It should be noted that the feed structure in this solution includes: a ball screw and nut pair, a guide rail, and a servo motor. The ball screw and nut pair converts the rotary motion of the servo motor into the linear motion of the worktable or tool. The guide rail guides the direction of motion of the moving parts, ensuring the straightness and accuracy of the motion, so as to achieve precise control of the workpiece cutting process. This is a conventional setting in this field, so it will not be described in detail here.

[0036] Furthermore, the positioning component 5 includes: a mounting plate 51 fixed to the bottom of the support plate 4, and the mounting plate 51 fixed within the mounting groove 3; at least two hinge seats 52 fixed on the support plate 4, with a positioning rod 53 rotatably connected to each hinge seat 52; a through hole 54 opened on the mounting plate 51, with a mounting ring 55 fixed on the through hole 54, and a connecting rod 56 slidingly passing through the mounting ring 55; the connecting rod 56 and the positioning rod 53 are hinged together by a mating plate 57; a movable block 58 is fixed to one end of the connecting rod 56 inside the through hole 54; a return spring a59 is sleeved on the connecting rod 56, with one end of the return spring a59 fixed to the movable block 58; the adjacent sides of the two movable blocks 58 are both planar; the central axis of the movable block 58 is collinear with the central axis of the through hole 54; and the movable block 58 is close to the roller 514. One side wall is set with a smooth arc surface. The arc surface of the movable block 58 ensures that the roller 514 and the movable block 58 have sufficient smoothness when they are pressed and transmitted, and prevents jamming during the pressing and transmission. The other end of the return spring a59 is fixed to the mounting ring 55. The mounting plate 51 has a channel 510 that is connected to the through hole 54. The transmission plate 511 is slidably connected in the channel 510. The cylinder 512 is fixed on the mounting plate 51 by a support plate. The output end of the cylinder 512 is fixed to the transmission plate 511. The transmission plate 511 has a slanted groove 513. The roller 514 is set between the through hole 54 and the channel 510. The roller 514 is slidably connected in the slanted groove 513. The included angle between the two through holes 54 is set at a right angle. The thickness of the transmission plate 511 is the same as the length of the roller 514.

[0037] Among them, rubber columns 6 are fixed on the side walls of the two adjacent positioning rods 53. The central axis of the connecting rod 56 is collinear with the central axis of the through hole 54. By adding the rubber columns 6, a certain pre-tightening is provided for the workpiece during positioning, thereby improving the positioning effect of the workpiece.

[0038] In addition, a mounting plate 7 is fixed between the channel 510 and the two through holes 54. The mounting plate 7 has a sliding groove 8, and the roller 514 is slidably connected inside the sliding groove 8. By sliding the roller 514 inside the sliding groove 8, the roller 514 can be guided and limited, further improving the stability and smoothness of the roller 514 when it moves, and preventing the roller 514 from getting stuck when it moves under force.

[0039] It should be noted that the five pairs of positioning components make it particularly suitable for precise clamping and positioning of small workpieces. It can effectively avoid the problem of poor machining results caused by insufficient positioning accuracy when cutting workpieces. Therefore, it performs very well in terms of workpiece positioning. Moreover, due to its flexibility and reliability, it has a wide range of applicability in a variety of different machining situations.

[0040] In this scheme, the workpiece positioning principle is as follows: The workpiece is placed on the bearing plate 4. Driven by the cylinder 512, the transmission plate 511 moves along the channel 510 after being subjected to force. The inclined groove 513 and the roller 514 exert a squeezing transmission effect, causing the roller 514 to move upward along the sliding groove 8 after being subjected to force. The squeezing effect between the roller 514 and the two movable blocks 58 causes the movable blocks 58 to move along the through hole 54 after being subjected to force, thereby driving the connecting rod 56 to move. At this time, the return spring a59 is in a compressed state. Utilizing the transmission effect of the docking plate 57, the positioning rod 53 is driven to rotate along the axis of the hinge seat 52, thereby achieving the purpose of positioning the workpiece. Example

[0041] Based on Example 1, according to Figure 5 - Figure 7 As shown, it is worth noting that the positioning rod 53 is provided with an adjusting component 9 that is adapted to the docking plate 57. The adjusting component 9 includes: a cavity 91 is opened on the positioning rod 53, a limiting rod 92 slides through the cavity 91 on the positioning rod 53, a plurality of limiting holes 93 are opened on the docking plate 57, the limiting holes 93 are adapted to the limiting rod 92, a connecting ring 94 that is slidably connected to the cavity 91 is fixed on the limiting rod 92, a return spring b95 is sleeved on the limiting rod 92, one end of the return spring b95 is fixed to the connecting ring 94, and the other end of the return spring b95 abuts against the cavity 91. The bearing plate 4 is circular in shape, and the top surface of the bearing plate 4 is located on the same horizontal plane as the top surface of the bed 1.

[0042] The positioning rod 53 has a smooth arc surface on one side wall near the docking plate 57. The end of the limiting rod 92 away from the limiting hole 93 is fixed with a pull ring 10. The smooth arc surface of the positioning rod 53 provides sufficient smoothness when adjusting the angle of the positioning rod 53, which can prevent jamming when adjusting the angle of the positioning rod 53. The addition of the pull ring 10 makes it convenient for the user to operate the limiting rod 92.

[0043] It should be noted that, through the setting of the adjusting component 9, the user can easily adjust the included angle between the positioning rod 53 and the docking plate 57 according to the actual usage needs. This design enables the device to flexibly adapt to workpieces of various sizes and shapes, and to perform effective clamping and positioning work. Its adjustment process is not only highly flexible, but also has a simple structural design, which greatly facilitates the user's operation and improves work efficiency.

[0044] The principle of adjusting the angle of the positioning rod 53 using the adjusting component 9 is as follows: By pulling the pull ring 10, the limiting rod 92 moves synchronously, thereby driving the connecting ring 94 to move synchronously. At this time, the return spring b95 is in a compressed state until the limiting rod 92 separates from the limiting hole 93, thereby releasing the limiting state of the positioning rod 53. The angle of the positioning rod 53 can then be rotated. After the angle of the positioning rod 53 is adjusted, the elasticity of the return spring b95 is used to drive the limiting rod 92 to spring back and reset, causing the limiting rod 92 to engage with the limiting hole 93, thus realizing the angle adjustment of the positioning rod 53.

[0045] The cylinder 512 can be purchased from the market. The cylinder 512 is equipped with a power supply. This is a mature technology in the field and has been fully disclosed. Therefore, it will not be described again in the specification.

[0046] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A positioning structure for a CNC milling machine, comprising: The bed (1) is characterized in that it further includes: a feeding mechanism (2) is provided on the bed (1), at least two mounting slots (3) are provided on the bed (1), a bearing plate (4) is fixed in the mounting slot (3), and a positioning component (5) is provided on the bearing plate (4), the positioning component (5) is used to clamp and position the workpiece; The positioning component (5) includes: a mounting plate (51) fixed to the bottom of the bearing plate (4), and the mounting plate (51) fixed to the mounting groove (3); at least two hinge seats (52) fixed on the bearing plate (4); a positioning rod (53) rotatably connected to the hinge seat (52); a through hole (54) opened on the mounting plate (51); a mounting ring (55) fixed on the through hole (54); a connecting rod (56) slidably passing through the mounting ring (55); the connecting rod (56) and the positioning rod (53) are hinged together by a mating plate (57); a movable block (58) is fixed to one end of the connecting rod (56) located inside the through hole (54); and a sleeve is fitted on the connecting rod (56). A reset spring a (59) is fixed at one end to the movable block (58) and at the other end to the mounting ring (55). A channel (510) communicating with the through hole (54) is provided on the mounting plate (51). A transmission plate (511) is slidably connected in the channel (510). A cylinder (512) is fixed on the mounting plate (51) by a support plate. The output end of the cylinder (512) is fixed to the transmission plate (511). A slanted groove (513) is provided on the transmission plate (511). A roller (514) is provided between the through hole (54) and the channel (510). The roller (514) is slidably connected in the slanted groove (513).

2. The positioning structure for a CNC milling machine according to claim 1, characterized in that, Rubber posts (6) are fixed on the side walls of the two positioning rods (53) adjacent to each other, and the central axis of the connecting rod (56) is collinear with the central axis of the through hole (54).

3. The positioning structure for a CNC milling machine according to claim 2, characterized in that, The two movable blocks (58) are both arranged in a planar shape on their adjacent sides. The central axis of the movable block (58) is collinear with the central axis of the through hole (54). The side wall of the movable block (58) near the roller (514) is arranged in a smooth arc surface.

4. The positioning structure for a CNC milling machine according to claim 1, characterized in that, The two through holes (54) are set at a right angle, and the thickness of the transmission plate (511) is the same as the length of the roller (514).

5. The positioning structure for a CNC milling machine according to claim 1, characterized in that, An mounting plate (7) is fixed between the channel (510) and the two through holes (54). A groove (8) is provided on the mounting plate (7), and the roller (514) is slidably connected inside the groove (8).

6. The positioning structure for a CNC milling machine according to claim 1, characterized in that, The positioning rod (53) is provided with an adjusting component (9) adapted to the docking plate (57). The adjusting component (9) includes: a cavity (91) is provided on the positioning rod (53), a limiting rod (92) slides through the cavity (91) on the positioning rod (53), a plurality of limiting holes (93) are provided on the docking plate (57), the limiting holes (93) are adapted to the limiting rod (92), a connecting ring (94) is fixed on the limiting rod (92) and slidably connected to the cavity (91), a return spring b (95) is sleeved on the limiting rod (92), one end of the return spring b (95) is fixed to the connecting ring (94), and the other end of the return spring b (95) abuts against the cavity (91).

7. A positioning structure for a CNC milling machine according to claim 6, characterized in that, The positioning rod (53) has a smooth arc surface on one side wall near the docking plate (57), and a pull ring (10) is fixed to one end of the limiting rod (92) away from the limiting hole (93).

8. The positioning structure for a CNC milling machine according to claim 1, characterized in that, The support plate (4) is circular in shape, and the top surface of the support plate (4) is on the same horizontal plane as the top surface of the bed (1).

9. A positioning structure for a CNC milling machine according to claim 1, characterized in that, The bottom surface of the bed (1) is fixed with several anti-slip pads (11).

Images