Numerical control machining equipment for improving clamping precision

Abstract

This utility model discloses a CNC machining equipment for improving clamping accuracy, comprising a main body including an automatic chuck, a motor, a tool magazine motion system, and a control center. The tool magazine motion system includes a base, tool assemblies, a left-right translation drive unit, and a front-back displacement drive unit. Each tool assembly includes a tool holder and a tool mounted on the tool holder. A loading fixture is mounted on the base near the front end, with its left end extending beyond the left end of the base. The left end of the loading fixture is designed as a positioning part that matches and positions with the right end of the product to be processed. The front-back displacement drive unit is connected to the base to drive the base to move back and forth, and the left-right translation drive unit is connected to the front-back displacement drive unit to drive the front-back displacement drive unit to move left and right. This cleverly integrates the loading function with the tool magazine motion system, resulting in high consistency in product clamping position, providing a stable reference surface for subsequent processing, and significantly improving loading accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of CNC equipment for metal processing, and in particular to a CNC machining equipment for improving clamping accuracy. Background Technology

[0002] Existing mature CNC machining equipment can be precisely controlled through programming, ensuring dimensional accuracy and surface quality of products and improving product yield. For example, CNC milling machines are highly precise in processing details such as dimensions and curvature of different metal components, offering higher accuracy compared to conventional milling. Therefore, for small metal parts, such as automotive parts, sensor housings, and cooling connector housings, they are typically fed to an automatic chuck by a robotic arm or manually. The automatic chuck holds one end of the small metal part, while the other end is machined by a cutting tool to form the end face, peripheral surface, or inner wall. However, the consistency of the force applied when loading the product into the automatic chuck is difficult to guarantee, easily leading to positional deviations (such as center axis deviation or flatness deviation) and negatively impacting the dimensional accuracy of subsequent product processing.

[0003] For example, CN215357279U discloses an integrated CNC lathe for machining metal workpieces, which integrates turning and milling, and can turn and mill complex curved surfaces with high equipment versatility. It includes a platform, a mounting base, a turning motor, a chuck, multiple calipers, a forward slide, and left and right slides. The platform is equipped with a mounting base, the mounting base is equipped with a turning motor, the turning motor is equipped with a chuck, the chuck is equipped with multiple calipers, the forward slide is equipped with the platform, the left and right slides are equipped with the forward slide, and the left and right slides are equipped with tool holders. It also includes a chuck mounting plate, a chuck rail, a rotating device, a rotary table, a spindle seat, a spindle, a tool holder, and a milling cutter. The chuck is equipped with a chuck mounting plate, which is slidably connected to the chuck via the chuck rail. The left and right slides are equipped with a rotating device, the rotating device is equipped with a rotary table, the rotary table is equipped with a spindle seat and a spindle, and the output shaft of the spindle is concentrically equipped with a tool holder that holds a milling cutter. During operation, the metal workpiece is clamped on multiple clamping blocks, then a matching cutting tool is installed on the tool holder, and then the turning motor and spindle are turned on. The forward motor and left and right motors drive the forward slide and left and right slide to move according to the program to turn and mill the metal workpiece. Finally, the finished workpiece is removed and replaced with a new workpiece.

[0004] Positional deviations during product clamping make it difficult to meet higher machining accuracy requirements during actual processing. Moreover, for many small and medium-sized processing plants, it is difficult to completely replace all CNC equipment with the new generation, as the high cost is a major constraint in reality.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a CNC machining equipment that improves clamping accuracy. It cleverly integrates the feeding function and the tool magazine motion system, resulting in high consistency of product clamping position, providing a stable reference surface for subsequent processing, significantly improving feeding accuracy and efficiency, without increasing equipment costs excessively, and is suitable for widespread application.

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

[0008] A CNC machining equipment for improving clamping accuracy includes a main body, which includes an automatic chuck, a motor, a tool magazine motion system, and a control center. The motor drives the automatic chuck to rotate around a left-right axis. The control center is connected to and controls the automatic chuck, the motor, and the tool magazine motion system.

[0009] The tool magazine motion system includes a base, tool assemblies, a left-right translation drive unit, and a front-back displacement drive unit. Several sets of tool assemblies are arranged at intervals on the base, and each tool assembly includes a tool holder and a tool mounted on the tool holder. A loading fixture is mounted on the base near its front end, extending left and right. The left end of the loading fixture extends beyond the left end of the base, and its left end is designed as a positioning part that matches and positions with the right end of the product to be processed. The front-back displacement drive unit is connected to the base to drive the base to move back and forth, and the tool assemblies and the loading fixture move back and forth with the base. The left-right translation drive unit is connected to the front-back displacement drive unit to drive the front-back displacement drive unit to translate left and right, and the base, tool assemblies, and loading fixture move left and right with the front-back displacement drive unit.

[0010] As a preferred embodiment, the base has several sets of mounting holes arranged along the front-to-back spacing. The mounting holes are oblong, with their left-right width greater than their front-to-back width. The tool holder is mounted on the corresponding mounting holes, and the loading fixture is mounted on the mounting hole at the front end, so that the loading fixture is located in front of all tool assemblies.

[0011] As a preferred embodiment, the base extends obliquely upward from front to back, so that all tool assemblies are exposed facing forward on the base.

[0012] As a preferred embodiment, the feeding fixture includes a mounting base, a guide post, a guide post connecting block, and a positioning part. The positioning part is detachably mounted on the left end of the guide post connecting block, the left end of the guide post is detachably connected to the right end of the guide post connecting block, the guide post is connected to the mounting base and its position is adjustable along the mounting base, and the mounting base is detachably mounted on the base.

[0013] As a preferred embodiment, the mounting base is provided with a through hole extending from left to right, and the guide post passes through the through hole.

[0014] As a preferred embodiment, the left end of the positioning part is provided with a quick-release hole, and the inner circumferential surface of the quick-release hole is provided with a positioning groove along the radial direction.

[0015] As a preferred embodiment, the left end of the positioning part is also connected to at least one positioning protrusion, which extends horizontally to the left.

[0016] As a preferred embodiment, the right end of the positioning protrusion is integrally connected to a lead screw that extends horizontally to the right, and the left end of the positioning part is recessed with a horizontally extending internal threaded hole. The lead screw is threaded into the internal threaded hole. Rotating the positioning protrusion causes the lead screw to move left and right within the internal threaded hole, thereby adjusting the leftward extension length of the positioning protrusion.

[0017] As a preferred embodiment, the lead screw is detachably connected to the positioning part.

[0018] As a preferred embodiment, the positioning part has an annular boss surrounding the outer periphery of the quick-release hole.

[0019] This utility model has significant advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it mainly involves installing a loading fixture at the front end of the base of the tool magazine motion system. The loading fixture extends to the left and right, with its left end extending beyond the left end of the base. The left end of the loading fixture is designed as a positioning part that matches and positions the right end of the product to be processed. In use, the right end of the product is manually mounted onto the positioning part. Then, the original left-right translation drive unit and front-back displacement drive unit of the tool magazine motion system drive the product to face the automatic chuck and load the product onto the automatic chuck to the left, thus achieving product installation. Compared with the traditional technology of using a robotic arm to pick up and feed the material to the automatic chuck or manually picking up and feeding the material to the automatic chuck, this method first loads the product onto the automatic chuck. The loading fixture serves as a pre-positioning mechanism, ensuring good positioning and calibration of the product both in the plane and along the axis. Powered by the existing left-right translation and forward-backward displacement drive units of the tool magazine motion system, the product on the loading fixture is smoothly pushed into the automatic chuck. Precise installation and consistent pushing and locking force ensure accurate placement of the product on the automatic chuck, facilitating subsequent control and improvement of product machining dimensional accuracy. This avoids product positional deviations (such as center axis deviation and flatness deviation) caused by direct loading onto the automatic chuck by a robotic arm or manually. Therefore, it cleverly integrates the loading function with the tool magazine motion system, achieving high consistency in product clamping position, providing a stable reference surface for subsequent processing, significantly improving loading accuracy and efficiency without excessively increasing equipment costs, making it suitable for widespread application.

[0020] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the main functional components of a CNC machining equipment according to an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the feeding fixture according to an embodiment of the present utility model;

[0023] Figure 3 This is an exploded view of the feeding fixture according to an embodiment of the present utility model;

[0024] Figure 4 This is another exploded view of the feeding fixture according to an embodiment of the present utility model;

[0025] Figure 5 This is a diagram illustrating the state of the feeding fixture in an embodiment of the present invention, where the left and right positions are adjusted via guide columns. Detailed Implementation

[0026] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0027] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] A CNC machining equipment for improving clamping accuracy includes a main body, which comprises a motor-spindle chuck system 500, a tool magazine motion system, and a control center. The motor-spindle chuck system 500 includes an automatic chuck 501, a spindle 502, and a motor 503. The motor 503 drives the spindle 502, and the automatic chuck 501 is mounted on the spindle 502, causing it to rotate about a left-right axis when the motor 503 is operating. The control center connects to and controls the automatic chuck 501, the motor 503, and the tool magazine motion system.

[0029] The tool magazine motion system includes a base 100, a tool assembly 200, a front-to-back displacement drive unit 300, and a left-to-right translation drive unit 400. The front-to-back displacement drive unit 300 is existing technology and is usually an existing drive unit of the tool magazine motion system on CNC machining equipment. It usually adopts a lead screw or linear motor, etc., and is generally equipped with left and right guide rails 401.

[0030] The tool assembly 200 is provided in several groups and is arranged at a front-to-back distance on the base 100. Each tool assembly 200 includes a tool holder 202 and a tool 201 mounted on the tool holder 202. A loading fixture 600 is installed on the base 100 near the front end. The loading fixture 600 extends to the left and right. The left end of the loading fixture 600 extends out of the left end of the base 100. The left end of the loading fixture 600 is designed as a positioning part 20 that matches and positions with the right end of the product to be processed. The forward and backward displacement driving unit 300 is connected to the base 100 to drive the base 100 to move forward and backward, and the tool assembly 200 and the loading fixture 600 move forward and backward along with the base 100; the left and right translation driving unit 400 is connected to the forward and backward displacement driving unit 300 to drive the forward and backward displacement driving unit 300 to translate left and right, and the base 100, the tool assembly 200, and the loading fixture 600 translate left and right along with the forward and backward displacement driving unit 300.

[0031] In use, the right end of product 10 is manually mounted onto the positioning part 20. Then, the left and right translation drive unit 400 and the front and rear displacement drive unit 300 of the tool magazine motion system drive product 10 to face the automatic chuck 501 and load product 10 onto the automatic chuck 501 to the left, thus installing product 10. Subsequently, the corresponding tool 201 processes the right end of product 10. During processing, product 10 rotates while tool 201 does not rotate. Compared to traditional methods that use a robotic arm to pick up and feed materials to the automatic chuck 501 or use manual methods, this technical solution uses a loading fixture 600 to first mount the product 10 onto the fixture. The loading fixture 600 serves as a pre-positioning mechanism, which helps ensure that the product 10 is well positioned and calibrated both in the plane and in the axis. Using the existing left-right translation drive unit 400 and front-back displacement drive unit 300 of the tool magazine motion system as power, the product 10 on the loading fixture 600 is pushed horizontally into the automatic chuck 501. The installation and alignment are precise, and the pushing and locking force is consistent, ensuring that the product 10 is accurately positioned in the automatic chuck 501. This facilitates the control and improvement of the dimensional accuracy of the product 10 in subsequent processing and avoids product position deviations (such as center axis deviation and flatness deviation) caused by direct loading of materials onto the automatic chuck 501 by a robotic arm or by manual methods.

[0032] The base 100 has several sets of mounting holes 101 arranged at front-to-back intervals. The mounting holes 101 are oblong, with their left-right width greater than their front-to-back width. The tool holder 202 is mounted on the corresponding mounting hole 101. The loading fixture 600 is mounted on the mounting hole 101 at the front end, so that the loading fixture 600 is located in front of all the tool assemblies 200, making it convenient for manual placement of the product 10 onto the loading fixture 600. Usually, the front of the main body of the equipment is provided with an opening and closing door, which is set to open and close left and right. Manual handling is convenient for picking up and placing the product 10 on the front of the main body of the equipment.

[0033] Preferably, the base 100 extends obliquely upward from front to back, so that all the tool assemblies 200 are exposed facing forward on the base 100, which facilitates the disassembly and replacement of the tool assemblies 200 as well as maintenance and cleaning operations.

[0034] The feeding fixture 600 includes a mounting base 50, a guide post 40, a guide post connecting block 30, and a positioning part 20. The left end of the positioning part 20 is recessed with a quick-release hole 21. The right end of the product 10 extends to the right with a plurality of positioning arms, which together form an outwardly expanding elastic arm group. The inner circumferential surface of the quick-release hole 21 is radially recessed with a positioning groove 211 corresponding to the plurality of positioning arms. The plurality of positioning arms are squeezed into the quick-release hole 21 and confined within the corresponding positioning groove 211. The positioning part 20 is detachably installed on the left end of the guide post connecting block 30, and the left end of the guide post 40 is detachably connected to the right end of the guide post connecting block 30. A first connecting hole 41 is provided on the left end of the guide post 40. The guide post 40 is cylindrical, and its left section is designed with a beveled surface, making the left section a non-cylindrical irregular part 42. An irregular fitting groove 33 is provided on the right end of the guide post connecting block 30 for the guide part 42 of the guide post 40 to be inserted. A second connecting hole 31 is provided on the left end of the guide post connecting block 30, which extends to the right through the irregular fitting groove 33. When installing the guide post 40, first insert the left end of the guide post into the irregular fitting groove 33, and then use screws to lock the second connecting hole 31 and the first connecting hole 41 from left to right.

[0035] The guide post 40 is connected to the mounting base 50 and its position is adjustable along the mounting base 50. The mounting base 50 is detachably mounted on the base 100. The mounting base 50 is provided with a through hole 511 extending horizontally, through which the guide post 40 passes. A locking hole can be provided on the outer periphery of the mounting base 50 corresponding to the through hole 511. A screw passes through the locking hole and extends radially into the through hole 511 to abut against the outer periphery of the guide post 40, thereby locking the guide post 40. When the position of the guide post 40 needs to be adjusted, the screw is loosened, the guide post 40 is moved to the appropriate position, and then the screw is locked back in place. In this embodiment, the mounting base 50 is L-shaped and includes a guide post receiving part 51 and a fixture fixing part 52. The fixture fixing part 52 is an elongated strip that extends laterally from left to right. The guide post receiving part 51 protrudes upward from the top left end of the fixture fixing part 52, and the through hole 511 passes through the guide post receiving part 51 from left to right.

[0036] Furthermore, at least one positioning protrusion 60 is connected to the left end of the positioning part 20. The positioning protrusion 60 extends horizontally to the left and can also be combined with the positioning part 20 to form a matching positioning of the right end of the product 10 to be processed. A lead screw 61 extending horizontally to the right is integrally connected to the right end of the positioning protrusion 60. The left end of the positioning part 20 is recessed with a horizontally extending internal threaded hole 32. The lead screw 61 is threaded into the internal threaded hole 32. Rotating the positioning protrusion 60 causes the lead screw 61 to move left and right within the internal threaded hole 32, thereby adjusting the leftward extension length of the positioning protrusion 60. The lead screw 61 is detachably connected to the positioning part 20. When the positioning protrusion 60 is not needed or its presence would affect the positioning of the product or cause interference, the lead screw can be removed, in which case the positioning protrusion 60 is not present on the positioning part 20. In cases where the positioning protrusion 60 needs to be retained, the product 10 generally has two pre-set notches around its perimeter for the positioning protrusion 60 to pass through. Therefore, by adjusting the positioning protrusion 60, the positioning of different sub-models of the same series can be satisfied.

[0037] For different products, the feeding fixture can be replaced, or only the positioning part 20 can be replaced as needed. The positioning part 20 can meet the positioning needs of a series or similar series of multiple products. If the product type varies significantly, different positioning parts can be replaced. The positioning part can be made of materials such as plastic.

[0038] The general workflow of the CNC machining equipment in this embodiment is as follows:

[0039] 1. The right end of product 10 is manually loaded into the positioning part 20 of the loading fixture 600;

[0040] 2. The front and rear displacement driving unit 300 drives the base 100 to move backward so that the product 10 on the positioning part 20 is aligned with the automatic chuck 501;

[0041] 3. The left and right translation drive unit 400 drives the base 100 to translate to the left and pushes the product 10 into the automatic chuck 501 on the left side;

[0042] 4. The automatic chuck 501 locking product;

[0043] 5. The left and right translation drive unit 400 drives the base 100 to move back a short distance to the right, so that the positioning part 20 is disengaged from the product 10;

[0044] 6. The forward and backward displacement driving unit 300 drives the base 100 to move forward, so that the tool assembly 200, which is suitable for the current processing mode, is aligned with the product 10.

[0045] 7. The left and right translation drive unit 400 drives the base 100 to translate to the left, so that the tool 201 processes the right end of the product 10;

[0046] 8. After the cutting tool 201 has finished processing, the base 100 is driven to move to the right and back by the left and right translation drive unit 400.

[0047] The key design feature of this invention lies in the installation of a loading fixture 600 on the front end of the base 100 of the tool magazine motion system. The loading fixture 600 extends laterally, with its left end extending beyond the left end of the base 100. The left end of the loading fixture 600 is designed as a positioning part 20 that matches and positions the right end of the product to be processed. In use, the right end of the product is manually mounted onto the positioning part 20. Then, using the existing left-right translation drive unit 400 and front-back displacement drive unit 300 of the tool magazine motion system, the product is aligned with the automatic chuck 501 and loaded onto it to the left, thus completing the product installation. Compared to traditional methods that use a robotic arm to pick up and feed material to the automatic chuck 501 or are manually picked up and fed to the automatic chuck 501, this method first loads the product onto the loading fixture 600. By utilizing the loading fixture 600 for pre-positioning, it is beneficial to ensure that the product is well positioned and calibrated on the loading fixture 600 in both the plane and the axis. With the help of the existing left and right translation drive unit 400 and front and back displacement drive unit 300 of the tool magazine motion system, the product on the loading fixture 600 is pushed and loaded into the automatic chuck 501. The installation and alignment are precise and the pushing and locking force is consistent, ensuring that the product is accurately positioned on the automatic chuck 501. This is beneficial for the control and improvement of the product's dimensional accuracy in subsequent processing, and avoids product position deviations (such as center axis deviation and flatness deviation) caused by the robot or manual loading directly onto the automatic chuck 501. Therefore, it cleverly integrates the loading function with the tool magazine motion system, with high consistency of product clamping position, providing a stable reference surface for subsequent processing, significantly improving loading accuracy and efficiency, without increasing equipment costs too much, and is suitable for widespread application.

[0048] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A CNC machining equipment for improving clamping accuracy, comprising a main body, the main body including an automatic chuck, a motor, a tool magazine motion system, and a control center, wherein the motor drives the automatic chuck to rotate around a left-right axis; the control center is connected to and controls the automatic chuck, the motor, and the tool magazine motion system; characterized in that: The tool magazine motion system includes a base, tool assemblies, a left-right translation drive unit, and a front-back displacement drive unit. Several sets of tool assemblies are arranged at intervals on the base, and each tool assembly includes a tool holder and a tool mounted on the tool holder. A loading fixture is mounted on the base near its front end, extending left and right. The left end of the loading fixture extends beyond the left end of the base, and its left end is designed as a positioning part that matches and positions with the right end of the product to be processed. The front-back displacement drive unit is connected to the base to drive the base to move back and forth, and the tool assemblies and the loading fixture move back and forth with the base. The left-right translation drive unit is connected to the front-back displacement drive unit to drive the front-back displacement drive unit to translate left and right, and the base, tool assemblies, and loading fixture move left and right with the front-back displacement drive unit.

2. The CNC machining equipment for improving clamping accuracy according to claim 1, characterized in that: The base has several sets of mounting holes arranged at front-to-back spacing. The mounting holes are oblong, with their left-right width greater than their front-to-back width. The tool holder is mounted on the corresponding mounting hole, and the loading fixture is mounted on the mounting hole at the front end, so that the loading fixture is located in front of all tool assemblies.

3. The CNC machining equipment for improving clamping accuracy according to claim 1, characterized in that: The base extends obliquely upward from front to back, so that all tool assemblies are exposed facing forward on the base.

4. The CNC machining equipment for improving clamping accuracy according to claim 1, characterized in that: The feeding fixture includes a mounting base, a guide post, a guide post connecting block, and a positioning part. The positioning part is detachably mounted on the left end of the guide post connecting block. The left end of the guide post is detachably connected to the right end of the guide post connecting block. The guide post is connected to the mounting base and its position can be adjusted along the mounting base. The mounting base is detachably mounted on the base.

5. The CNC machining equipment for improving clamping accuracy according to claim 4, characterized in that: The mounting base is provided with a through hole extending from left to right, and the guide post passes through the through hole.

6. The CNC machining equipment for improving clamping accuracy according to claim 4, characterized in that: The left end of the positioning part is recessed with a quick-release hole, and the inner circumferential surface of the quick-release hole is recessed with a positioning groove along the radial direction.

7. The CNC machining equipment for improving clamping accuracy according to claim 4 or 6, characterized in that: The left end of the positioning part is also connected to at least one positioning protrusion, which extends horizontally to the left.

8. The CNC machining equipment for improving clamping accuracy according to claim 7, characterized in that: The right end of the positioning protrusion is integrally connected to a lead screw that extends horizontally to the right. The left end of the positioning part is recessed with a horizontally extending internal threaded hole. The lead screw is threaded into the internal threaded hole. Rotating the positioning protrusion causes the lead screw to move left and right within the internal threaded hole, thereby adjusting the leftward extension length of the positioning protrusion.

9. The CNC machining equipment for improving clamping accuracy according to claim 8, characterized in that: The lead screw is detachably connected to the positioning part.

10. The CNC machining equipment for improving clamping accuracy according to claim 6, characterized in that: The positioning part has an annular boss surrounding the outer periphery of the quick-release hole.

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