Adjustable fixture for numerically controlled machine tools

Abstract

The utility model discloses an adjustable clamp for numerical control machine tool, include: clamp main part unit, it includes base plate, fixedly set on the fixed jaw of base plate and the movable jaw of sliding setting on base plate, be provided with the hydraulic stem for driving movable jaw linear movement along the surface of base plate on base plate, the output of hydraulic stem is rigidly connected with movable jaw, the inclination angle of clamp main part unit is changed for the inclination angle adjusting unit, and it includes base, the pivot is rotatably installed on the base, and the bottom fixed mounting of base plate is on pivot. The utility model through worm -gear gear drive mechanism can realize the accurate control of base plate inclination angle, satisfies the oblique cutting processing demand of work piece, can adjust the inclination angle of work piece, when carrying out cutting oblique processing procedure, need not secondary clamping, can complete processing one time, has improved the processing efficiency greatly.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to an adjustable fixture for CNC machine tools. Background Technology

[0002] In the field of CNC machine tool machining, fixtures, as key components for fixing workpieces, directly affect machining accuracy and efficiency due to their adjustability, clamping stability, and structural reliability. Existing CNC machine tool fixtures generally suffer from the following technical bottlenecks.

[0003] Most existing CNC machine tool fixtures are integrated with the machine tool and cannot move. After fixing the workpiece to be processed, the workpiece is processed by controlling the movement of the cutting tool. There is a lack of fixtures that can adjust the tilt angle of the workpiece. When encountering a process that requires beveling the workpiece, it cannot be completed in one go and a second clamping is required. This not only results in low efficiency but also makes it impossible to guarantee the precision of the machining of the parts. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the current adjustable fixture for CNC machine tools, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an adjustable fixture for CNC machine tools, which is suitable for solving the problem that existing fixtures cannot complete the oblique cutting process in one go and require secondary clamping.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an adjustable fixture for CNC machine tools, comprising:

[0008] The clamping main unit includes a base plate, a fixed jaw fixedly mounted on the base plate, and a movable jaw slidably mounted on the base plate. A hydraulic rod is provided on the base plate for driving the movable jaw to move linearly along the surface of the base plate, and the output end of the hydraulic rod is rigidly connected to the movable jaw. A tilt adjustment unit is used to change the tilt angle of the clamping main unit. It includes a base, on which a rotating shaft is rotatably mounted. The bottom of the base plate is fixedly mounted on the rotating shaft. A rotating assembly is provided on the base for driving the rotating shaft to rotate, and a transmission assembly is provided between the output end of the rotating assembly and the rotating shaft.

[0009] As a preferred embodiment of the adjustable fixture for CNC machine tools described in this utility model, the fixed jaw and the movable jaw are each provided with a buffer pad group on one side close to each other. The buffer pad group is composed of several layers of elastic pads. The other side of the pads and the working surfaces of the fixed jaw and the movable jaw are provided with dovetail grooves that fit with the dovetail blocks. Adjacent pads are detachably connected to each other and to the jaws through the insertion of the dovetail blocks and the dovetail grooves.

[0010] As a preferred embodiment of the adjustable fixture for CNC machine tools described in this utility model, the bottom of the base plate is fixedly connected to a sector plate coaxially arranged with the rotating shaft, the sector plate is fixedly connected to the rotating shaft, the base is provided with an arc-shaped limiting groove matching the contour of the sector plate, and the side edge of the sector plate slides in contact with the inner wall of the limiting groove.

[0011] As a preferred embodiment of the adjustable fixture for CNC machine tools described in this utility model, the transmission assembly includes a driven gear fixedly sleeved on a rotating shaft, the driven gear being fixedly installed at the bottom end of a base plate, a transmission shaft being connected to a rotating shaft on the base, and a driving gear being fixedly connected to one end of the transmission shaft, the driving gear meshing with the driven gear.

[0012] In a preferred embodiment of the adjustable fixture for CNC machine tools described in this utility model, the rotating assembly includes a worm gear and a worm. A cavity is provided inside the base. One end of the drive shaft passes through the side wall of the base and extends into the cavity, rotatably connecting with the inner wall of the cavity. The worm gear is fixedly sleeved on the drive shaft, and the worm is rotatably mounted on the inner wall of the cavity. The worm gear and worm are meshed together. In another preferred embodiment of the adjustable fixture for CNC machine tools described in this utility model, the rotating assembly further includes a drive shaft fixedly mounted on one end of the worm. A motor cavity is provided on the base. One end of the drive shaft passes through the side wall of the base and extends into the motor cavity. A drive motor is fixedly mounted inside the motor cavity, and the output end of the drive motor is connected to the drive shaft.

[0013] As a preferred embodiment of the adjustable fixture for CNC machine tools described in this utility model, the base is provided with a dustproof groove, and the meshing parts of the driven gear and the driving gear are completely located inside the dustproof groove.

[0014] As a preferred embodiment of the adjustable fixture for CNC machine tools described in this utility model, dustproof plates are symmetrically arranged at the bottom end of the base plate, and the side of the two dustproof plates that are close to each other is attached to the outer surface of the base.

[0015] The beneficial effects of this utility model are as follows: Through the worm gear-gear transmission mechanism, the tilt angle of the substrate can be precisely controlled to meet the requirements of workpiece beveling. The tilt angle of the workpiece can be adjusted. When performing beveling, there is no need for secondary clamping, and the processing can be completed in one go, which greatly improves the processing efficiency.

[0016] The elastic cushioning effect of the buffer pad assembly can adapt to workpieces with different surface hardness, and the detachable structure enhances the compatibility of the fixture with a variety of workpieces.

[0017] The sector-shaped plate and arc-shaped limiting groove ensure the stability and safety of the base plate rotation. The self-locking function of the worm gear drive ensures that the adjusted tilt angle can be maintained stably. The dustproof structure ensures the normal operation of the transmission components and extends the service life of the fixture. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of 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. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of an adjustable fixture for CNC machine tools proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the main unit structure of an adjustable fixture for CNC machine tools proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the transmission component structure of an adjustable fixture for CNC machine tools proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the rotating component structure of an adjustable fixture for CNC machine tools proposed in this utility model.

[0023] Figure descriptions: 100, main clamping unit; 101, base plate; 102, fixed jaws; 103, movable jaws; 104, hydraulic rod; 105, buffer pad assembly; 105a, elastic pad; 105b, dovetail groove; 105c, dovetail block;

[0024] 200. Tilt adjustment unit; 201. Base; 202. Rotating shaft; 203. Rotating assembly; 203a. Worm gear; 203b. Worm; 203c. Drive shaft; 203d. Drive motor; 203e. Motor compartment; 203f. Empty compartment; 204. Transmission assembly; 204a. Driven gear; 204b. Transmission shaft; 204c. Drive gear; 205. Sector plate; 206. Arc-shaped limiting groove; 207. Dustproof groove; 208. Dustproof plate. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0029] Example 1

[0030] Reference Figures 1 to 4 As one embodiment of this utility model, an adjustable fixture for a CNC machine tool is provided, comprising:

[0031] The clamp main unit 100 includes a base plate 101, a fixed jaw 102 fixedly disposed on the base plate 101, and a movable jaw 103 slidably disposed on the base plate 101. A hydraulic rod 104 is provided on the base plate 101 for driving the movable jaw 103 to move linearly along the surface of the base plate 101. The output end of the hydraulic rod 104 is rigidly connected to the movable jaw 103.

[0032] During operation, when workpiece clamping is required, the hydraulic rod 104 is controlled to operate. The function of the hydraulic rod 104 is to provide linear movement power for the movable jaw 103. The output end of the hydraulic rod 104 is rigidly connected to the movable jaw 103, ensuring effective force transmission. When the hydraulic rod 104 extends, the movable jaw 103 moves along the surface of the base plate 101 towards the fixed jaw 102, thereby clamping the workpiece between the fixed jaw 102 and the movable jaw 103. When it is necessary to remove the workpiece, the hydraulic rod 104 retracts, the movable jaw 103 moves away from the fixed jaw 102, and the workpiece can be removed. This structural design makes the clamping process simple and efficient, and provides a stable clamping force, ensuring that the workpiece will not shift during processing, thus improving the accuracy and stability of the processing.

[0033] Both the fixed jaw 102 and the movable jaw 103 are provided with a buffer pad assembly 105 on one side close to each other. The buffer pad assembly 105 is composed of several stacked elastic pads 105a. The other side of the pads and the working surfaces of the fixed jaw 102 and the movable jaw 103 are provided with dovetail grooves 105b that are clearance-fitted with dovetail blocks 105c. Adjacent pads are detachably connected to each other and to the jaws through the insertion of dovetail blocks 105c and dovetail grooves 105b.

[0034] The buffer pad assembly 105 serves two main purposes. Firstly, the elastic pads 105a provide cushioning, preventing damage to the workpiece surface from rigid contact when the movable jaws 103 clamp the workpiece, thus protecting its appearance and quality. Secondly, its detachable design offers excellent versatility. When dealing with workpieces of different materials, shapes, or sizes, elastic pads 105a of varying thicknesses, hardness, or materials can be replaced according to actual needs. For example, for softer workpieces, softer pads can be used to prevent pinching; for larger workpieces, the number of pad layers can be increased appropriately. This detachable structure allows the fixture to adapt to diverse processing requirements, improving its applicability and flexibility.

[0035] The tilt adjustment unit 200 is used to change the tilt angle of the fixture main body unit 100. It includes a base 201, a rotating shaft 202 is rotatably mounted on the base 201, the bottom of the base plate 101 is fixedly mounted on the rotating shaft 202, a rotating component 203 for driving the rotating shaft 202 to rotate is provided on the base 201, and a transmission component 204 is provided between the output end of the rotating component 203 and the rotating shaft 202.

[0036] When a process requiring a change in machining angle, such as beveling, is needed, the rotating assembly 203 begins to operate. The rotating assembly 203 provides rotational power, which is transmitted to the rotating shaft 202 via the transmission assembly 204. Since the bottom of the base plate 101 is fixedly mounted on the rotating shaft 202, the rotation of the shaft 202 causes the base plate 101 and the fixture main body unit 100 mounted on the base plate 101 to rotate together, thereby changing the workpiece's tilt angle. This eliminates the need for secondary clamping of the workpiece, enabling the beveling and other machining processes to be completed in one operation, improving machining efficiency, and avoiding positioning errors caused by secondary clamping, thus ensuring machining accuracy.

[0037] Example 2

[0038] Reference Figures 1 to 4 This is the second embodiment of the present invention. Unlike the previous embodiment, the bottom of the substrate 101 is fixedly connected to a fan-shaped plate 205 coaxially arranged with the rotating shaft 202. The fan-shaped plate 205 is fixedly connected to the rotating shaft 202. The base 201 is provided with an arc-shaped limiting groove 206 that matches the contour of the fan-shaped plate 205. The side edge of the fan-shaped plate 205 slides in contact with the inner wall of the limiting groove.

[0039] During the rotation of the fixture main unit 100, the sector plate 205 and the arc-shaped limiting groove 206 play important roles. The sector plate 205 is coaxially arranged and fixedly connected to the rotating shaft 202. When the rotating shaft 202 drives the substrate 101 to rotate, the sector plate 205 rotates along with it. The contour of the arc-shaped limiting groove 206 matches that of the sector plate 205, and the side edge of the sector plate 205 slides on the inner wall of the limiting groove. Its function is to limit the rotation angle of the substrate 101, prevent the rotating shaft 202 from rotating excessively, and ensure that the fixture is adjusted within a safe angle range. At the same time, this sliding contact method can also provide a certain guiding effect for the rotation of the substrate 101, making the rotation process smoother and more precise, and further improving the accuracy of processing.

[0040] The transmission assembly 204 includes a driven gear 204a fixedly sleeved on the rotating shaft 202. The driven gear 204a is fixedly installed on the bottom end of the base plate 101. The rotating shaft 202 on the base 201 is connected to a transmission shaft 204b. One end of the transmission shaft 204b is fixedly connected to a driving gear 204c. The driving gear 204c meshes with the driven gear 204a.

[0041] When the rotating assembly 203 operates, its power is first transmitted to the drive shaft 204b, which in turn drives the driving gear 204c to rotate. Since the driving gear 204c meshes with the driven gear 204a, the rotation of the driving gear 204c causes the driven gear 204a to rotate. The driven gear 204a, fixedly mounted on the rotating shaft 202, further drives the rotating shaft 202 to rotate, ultimately achieving the tilt angle adjustment of the base plate 101 and the fixture main unit 100. This gear transmission method has the advantages of high transmission efficiency and stable transmission ratio, accurately transmitting the power of the rotating assembly 203 to the rotating shaft 202, ensuring the accuracy and reliability of the tilt angle adjustment.

[0042] The rotating assembly 203 includes a worm gear 203a and a worm 203b. The base 201 has a cavity 203f inside. One end of the drive shaft 204b passes through the side wall of the base 201 and extends into the cavity 203f, and is rotatably connected to the inner wall of the cavity 203f. The worm gear 203a is fixedly sleeved on the drive shaft 204b, and the worm 203b is rotatably mounted on the inner wall of the cavity 203f. The worm gear 203a and the worm 203b are meshed together.

[0043] The worm gear 203a and worm 203b in the rotating assembly 203 form a reduction transmission mechanism. When the drive device (such as a motor) drives the worm 203b to rotate, the worm 203b meshes with the worm gear 203a, transmitting power to the worm gear 203a. Since the worm gear 203a is fixedly mounted on the transmission shaft 204b, the rotation of the worm gear 203a will drive the transmission shaft 204b to rotate. The worm gear 203a-worm 203b transmission has a large transmission ratio, achieving the effect of speed reduction and torque increase. This allows the drive device to provide sufficient torque to drive the transmission shaft 204b and subsequent components with relatively low power. It also achieves a self-locking function, meaning that when the drive device stops working, the worm 203b cannot reverse the rotation of the worm gear 203a, ensuring that the clamp can stably remain in the appropriate tilt angle after adjustment, without angle changes due to external forces or other factors.

[0044] The rotating assembly 203 also includes a drive shaft 203c fixedly installed at one end of the worm gear 203b. A motor compartment 203e is provided on the base 201. One end of the drive shaft 203c passes through the side wall of the base 201 and extends into the motor compartment 203e. A drive motor 203d is fixedly installed inside the motor compartment 203e. The output end of the drive motor 203d is connected to the drive shaft 203c.

[0045] The drive motor 203d is the power source for the entire rotating assembly 203. The drive motor 203d is fixedly installed inside the motor housing 203e, which provides a relatively stable and safe working environment for it. The output end of the drive motor 203d is connected to the drive shaft 203c. When the drive motor 203d starts, it drives the worm gear 203b to rotate via the drive shaft 203c. This rotation, through a series of transmission mechanisms such as the worm wheel 203a, worm gear 203b transmission, and gear transmission, ultimately achieves the adjustment of the tilt angle of the fixture main unit 100. This structural design enables automated control of the entire rotation process. By controlling the forward and reverse rotation and speed of the drive motor 203d, the tilt angle of the fixture can be precisely adjusted to meet the needs of different machining processes.

[0046] Example 3

[0047] Reference Figures 1 to 4 This is the third embodiment of the present invention. Unlike the previous embodiment, the base 201 has a dustproof groove 207, and the meshing parts of the driven gear 204a and the driving gear 204c are completely located inside the dustproof groove 207.

[0048] During CNC machine tool processing, a large amount of cutting fluid, metal shavings, and other impurities are generated. The function of the dustproof groove 207 is to prevent these impurities from entering the meshing area of ​​the driven gear 204a and the driving gear 204c. If impurities enter the meshing area, they will accelerate gear wear, reduce gear life, and may also affect the accuracy and stability of gear transmission. By placing the meshing area inside the dustproof groove 207, the gears can be effectively protected, the corrosion of impurities reduced, the gear life extended, and the reliability and stability of gear transmission ensured, thereby ensuring that the tilt angle adjustment function of the fixture can be realized normally and accurately.

[0049] Dustproof plates 208 are symmetrically arranged at the bottom of the substrate 101, and the side of the two dustproof plates 208 that are close to each other is attached to the outer surface of the base 201.

[0050] The dustproof plate 208 further enhances the dustproof effect of the fixture. Symmetrically positioned at the bottom of the base plate 101 and fitting snugly against the outer surface of the base 201, it prevents cutting fluid, metal shavings, and other contaminants from entering the fixture from the sides, particularly preventing impurities from entering critical components such as the rotating assembly 203 and the transmission assembly 204. This not only protects the internal components of the fixture, reducing malfunctions and wear caused by impurities, but also improves the overall reliability and stability of the fixture, enabling it to operate normally even in harsh machining environments, extending its service life, and reducing maintenance costs.

[0051] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An adjustable fixture for a CNC machine tool, characterized in that, include: The clamp main body unit (100) includes a base plate (101), a fixed jaw (102) fixedly disposed on the base plate (101), and a movable jaw (103) slidably disposed on the base plate (101). The base plate (101) is provided with a hydraulic rod (104) for driving the movable jaw (103) to move linearly along the surface of the base plate (101). The output end of the hydraulic rod (104) is rigidly connected to the movable jaw (103). The tilt adjustment unit (200) is used to change the tilt angle of the fixture body unit (100). It includes a base (201), on which a rotating shaft (202) is rotatably mounted. The bottom of the base plate (101) is fixedly mounted on the rotating shaft (202). A rotating component (203) for driving the rotating shaft (202) to rotate is provided on the base (201). A transmission component (204) is provided between the output end of the rotating component (203) and the rotating shaft (202).

2. The adjustable fixture for CNC machine tools according to claim 1, characterized in that: The fixed jaw (102) and the movable jaw (103) are each provided with a buffer pad assembly (105) on one side close to each other. The buffer pad assembly (105) is composed of several stacked elastic pads (105a). The other side of the pads and the working surfaces of the fixed jaw (102) and the movable jaw (103) are provided with dovetail grooves (105b) that fit with the dovetail block (105c). Adjacent pads and pads and jaws are detachably connected by inserting the dovetail block (105c) and the dovetail groove (105b).

3. The adjustable fixture for CNC machine tools according to claim 1, characterized in that: The bottom of the substrate (101) is fixedly connected to a fan-shaped plate (205) coaxially arranged with the rotating shaft (202). The fan-shaped plate (205) is fixedly connected to the rotating shaft (202). The base (201) is provided with an arc-shaped limiting groove (206) that matches the outline of the fan-shaped plate (205). The side edge of the fan-shaped plate (205) slides in contact with the inner wall of the limiting groove.

4. The adjustable fixture for CNC machine tools according to claim 1, characterized in that: The transmission assembly (204) includes a driven gear (204a) fixedly sleeved on a rotating shaft (202). The driven gear (204a) is fixedly installed on the bottom end of the base plate (101). A transmission shaft (204b) is connected to the rotating shaft (202) on the base (201). One end of the transmission shaft (204b) is fixedly connected to a driving gear (204c). The driving gear (204c) meshes with the driven gear (204a).

5. An adjustable fixture for a CNC machine tool according to claim 4, characterized in that: The rotating assembly (203) includes a worm gear (203a) and a worm (203b). The base (201) has an empty chamber (203f) inside. One end of the drive shaft (204b) passes through the side wall of the base (201) and extends into the empty chamber (203f), and is rotatably connected to the inner wall of the empty chamber (203f). The worm gear (203a) is fixedly sleeved on the drive shaft (204b), and the worm (203b) is rotatably installed on the inner wall of the empty chamber (203f). The worm gear (203a) and the worm (203b) are meshed together.

6. An adjustable fixture for a CNC machine tool according to claim 5, characterized in that: The rotating assembly (203) also includes a drive shaft (203c) fixedly installed at one end of the worm (203b). A motor compartment (203e) is provided on the base (201). One end of the drive shaft (203c) passes through the side wall of the base (201) and extends into the motor compartment (203e). A drive motor (203d) is fixedly installed inside the motor compartment (203e). The output end of the drive motor (203d) is connected to the drive shaft (203c).

7. An adjustable fixture for a CNC machine tool according to claim 4, characterized in that: The base (201) has a dustproof groove (207) and the meshing parts of the driven gear (204a) and the driving gear (204c) are completely located inside the dustproof groove (207).

8. An adjustable fixture for a CNC machine tool according to claim 1, characterized in that: Dustproof plates (208) are symmetrically arranged at the bottom end of the substrate (101), and the side of the two dustproof plates (208) that are close to each other is attached to the outer surface of the base (201).

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