A CNC machining center machine tool axial positioning device

Abstract

The utility model provides a kind of CNC numerical control machining center machine tool axial positioning device, comprising: base, the upper side of the base is provided with the adjusting mechanism for adjusting clamping positioning position, the adjusting mechanism is provided with the positioning mechanism for axial clamping positioning, the positioning mechanism includes mounting block, the inside of the mounting block is fixedly installed with support ring by screw, the right side surface of the support ring is fixedly connected with three groups of support plate, the inside of three groups The support plate is all penetrated with threaded rod by bearing, compared with prior art, the utility model has the beneficial effects as follows: by setting positioning mechanism, utilize threaded rod and the threaded motion of connecting block occurs, and then make connecting block drive clamping wheel produce displacement, to reach the purpose of workpiece clamping positioning, avoid workpiece cantilever in high-speed rotation or intermittent cutting form forced vibration, and then lead to the deterioration of processing workpiece surface quality and the error of size.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment, and specifically relates to an axial positioning device for a CNC machining center. Background Technology

[0002] CNC machine tools are modern machine tools that achieve high-precision and high-efficiency machining through computer numerical control technology. They control the relative movement of the tool and the workpiece through pre-programmed instructions to complete machining tasks such as cutting, milling, and drilling of complex parts. Their core lies in converting digital instructions into mechanical actions, relying on the coordinated work of servo systems, spindles, and feed mechanisms. They are characterized by high repeatability, strong adaptability, and high degree of automation. However, in machining scenarios where the workpiece has a long overhang or requires auxiliary support, the lack of an effective axial auxiliary positioning device can cause significant problems during machining. Due to the lack of axial positioning, when the tool applies cutting force to the workpiece, the overhang will undergo elastic deformation due to the lack of axial constraint, resulting in forced vibration during high-speed rotation or intermittent cutting. Simultaneously, changes in cutting force (such as uneven chip thickness or material hardness differences) can excite self-excited vibration (chatter), causing the workpiece to oscillate periodically in the radial and axial directions. This vibration leads to deterioration of the machined surface quality, resulting in chatter marks, increased roughness, and even dimensional deviations. Therefore, we aim to design an axial positioning device for CNC machining centers to solve this problem. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an axial positioning device for CNC machining centers, and to solve the problems mentioned in the background technology.

[0004] This utility model is achieved through the following technical solution: an axial positioning device for a CNC machining center, comprising: a base, wherein an adjustment mechanism for adjusting the clamping and positioning position is provided on the upper side of the base, and a positioning mechanism for axial clamping and positioning is provided on the adjustment mechanism;

[0005] The positioning mechanism includes a mounting block, and a support ring is fixedly mounted inside the mounting block by screws. Three sets of support plates are fixedly connected to the right side surface of the support ring, and threaded rods are passed through the interior of each of the three sets of support plates by bearings.

[0006] The outer sides of all three sets of threaded rods are connected by threaded connecting blocks. The lower end of each connecting block is fixedly connected to a fixed shaft. The outer side of the fixed shaft is fitted with a clamping wheel through a bearing. By setting a positioning mechanism, the position of the workpiece is clamped and positioned to prevent the workpiece from moving axially under the action of cutting force.

[0007] In a preferred embodiment, the clamping wheel is a rubber wheel with a high coefficient of friction on its clamping surface.

[0008] In a preferred embodiment, a limiting rod is fixedly connected to the left side surface of the support ring, and a guide groove is provided on the connecting block. The limiting rod is movably sleeved inside the guide groove of the connecting block to prevent the connecting block from rotating with the threaded rod.

[0009] In a preferred embodiment, a fixing block is fixedly connected to the lower end of the threaded rod, and an abutment block is slidably sleeved on the outer side of the lower end of the threaded rod. The lower surface of the abutment block is elastically connected to the fixing block by a spring. The elasticity of the spring generates an axial force between the fixing block and the support plate, reducing the risk of the threaded rod loosening due to vibration during the rotation of the workpiece.

[0010] In a preferred embodiment, the upper surface of the abutment block is provided with a rubber anti-slip pad to improve the friction of its surface.

[0011] In a preferred embodiment, the adjustment mechanism includes a support block, which is fixedly connected to the left and right ends of the base. An adjustment screw is sleeved inside the right end of the support block through a bearing. The left end of the adjustment screw passes through the inside of the support block through a bearing, and a handle is fixedly connected to the left end of the adjustment screw. By setting the adjustment mechanism, the position of the positioning mechanism can be adjusted, thereby improving the flexibility of the equipment.

[0012] In a preferred embodiment, the adjustment mechanism further includes a mounting plate, with sliders fixedly connected to the front and rear sides of the lower side of the mounting plate, and a fixing block fixedly connected to the center of the lower surface of the mounting plate, the fixing block being threaded onto the outside of the adjustment screw.

[0013] In a preferred embodiment, the upper front and rear ends of the base are fixedly connected to slide rails, and the slider is slidably fitted into the outer side of the slide rails.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are:

[0015] By setting up a positioning mechanism, the threaded rod and the connecting block move in a threaded motion, which in turn causes the connecting block to drive the clamping wheel to move, thereby achieving the purpose of clamping and positioning the workpiece. This avoids forced vibration of the workpiece overhang during high-speed rotation or intermittent cutting, which would lead to the deterioration of the surface quality of the machined workpiece and dimensional errors.

[0016] By setting an adjustment mechanism, the workpiece can be clamped and positioned at different locations, improving the flexibility of equipment use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0018] Figure 1 This is a left-side oblique view of the overall structure of an axial positioning device for a CNC machining center according to this utility model.

[0019] Figure 2 This is a perspective view of the adjustment mechanism of an axial positioning device for a CNC machining center according to the present invention.

[0020] Figure 3 This is a perspective view of the positioning mechanism of an axial positioning device for a CNC machining center according to the present invention.

[0021] Figure 4 This is a perspective view of the right side of the positioning mechanism of the axial positioning device for a CNC machining center according to the present invention.

[0022] Figure 5 This utility model relates to an axial positioning device for a CNC machining center. Figure 4 Enlarged view of part A of the structure.

[0023] In the diagram, 1-base, 2-adjustment mechanism, 3-positioning mechanism;

[0024] Support block, 22-adjusting screw, 23-handle, 24-mounting plate, 25-slider, 26-fixed block, 27-slide rail;

[0025] 31-Mounting block, 32-Support ring, 33-Support plate, 34-Threaded rod, 35-Connecting block, 36-Clamping wheel, 37-Limiting rod, 38-Fixing block, 39-Abutting block, 391-Spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1 to 5This utility model provides a technical solution: an axial positioning device for a CNC machining center, comprising: a base 1, an adjustment mechanism 2 for adjusting the clamping and positioning position is provided on the upper side of the base 1, and a positioning mechanism 3 for axial clamping and positioning is provided on the adjustment mechanism 2.

[0028] The positioning mechanism 3 includes a mounting block 31. A support ring 32 is fixedly mounted inside the mounting block 31 by screws. Three sets of support plates 33 are fixedly connected to the right side surface of the support ring 32. Threaded rods 34 pass through the interior of each of the three sets of support plates 33 via bearings.

[0029] The outer sides of the three sets of threaded rods 34 are all connected to connecting blocks 35 by threads. The lower end of the connecting block 35 is fixedly connected to a fixed shaft. The outer side of the fixed shaft is fitted with a clamping wheel 36 through a bearing. By setting the positioning mechanism 3, the position of the workpiece is clamped and positioned to prevent the workpiece from moving axially under the action of cutting force.

[0030] The clamping wheel 36 is a rubber wheel with a high coefficient of friction on its clamping surface.

[0031] A limiting rod 37 is fixedly connected to the left side surface of the support ring 32. A guide groove is provided on the connecting block 35. The limiting rod 37 is movably sleeved inside the guide groove of the connecting block 35 to prevent the connecting block 35 from rotating with the threaded rod 34.

[0032] The lower end of the threaded rod 34 is fixedly connected to a fixing block 26, and the outer side of the lower end of the threaded rod 34 is slidably sleeved with an abutment block 39. The lower surface of the abutment block 39 is elastically connected to the fixing block 26 through a spring 391. The elasticity of the spring 391 generates an axial force between the fixing block 26 and the support plate 33, reducing the risk of the threaded rod 34 loosening due to vibration during the rotation of the workpiece.

[0033] The upper surface of the abutment block 39 is provided with a rubber anti-slip pad to improve the friction of its surface.

[0034] The adjustment mechanism 2 includes a support block 21, which is fixedly connected to the left and right ends of the base 1. An adjustment screw 22 is sleeved inside the right support block 21 through a bearing. The left end of the adjustment screw 22 passes through the inside of the support block 21 through a bearing. A handle 23 is fixedly connected to the left end of the adjustment screw 22. By setting the adjustment mechanism 2, the position of the positioning mechanism 3 can be adjusted, thereby improving the flexibility of equipment use.

[0035] The adjustment mechanism 2 also includes a mounting plate 24. Slider 25 is fixedly connected to the front and rear sides of the lower side of the mounting plate 24. A fixing block 26 is fixedly connected to the middle of the lower surface of the mounting plate 24. The fixing block 26 is screwed onto the outside of the adjustment screw 22 by threads.

[0036] The upper front and rear ends of the base 1 are fixedly connected to slide rails 27, and the slider 25 is slidably fitted into the outside of the slide rails 27.

[0037] Please see Figure 1 , Figure 3 , Figure 4 as well as Figure 5 As the first embodiment of this utility model: In use, when it is necessary to clamp the overhanging part of the workpiece, first push the abutment block 39 downward to deform the compression spring 391 and separate it from the support plate 33. Then adjust the position of the support ring 32 through the adjustment mechanism 2. Then rotate the threaded rod 34. During the rotation, the threaded rod 34 and the connecting block 35 have a threaded movement, which causes the connecting block 35 to drive the clamping wheel 36 to move towards the center line of the support ring 32, thereby achieving the purpose of clamping the workpiece. This avoids the forced vibration of the overhanging part of the workpiece during high-speed rotation or intermittent cutting, which would lead to the deterioration of the surface quality of the processed workpiece and dimensional error problems.

[0038] Please see Figure 1 as well as Figure 5 As a second embodiment of this utility model: based on the description in the above embodiments, further, when adjusting the position of the support ring 32, firstly rotate the adjusting screw 22. During the rotation of the adjusting screw 22, it generates threaded movement with the fixing block 26, thereby causing the fixing block 26 to drive the mounting plate 24 and the slider 25 to move. Further, the mounting plate 24 drives the mounting block 31 and the support ring 32 to move, so as to adjust the position of the support ring 32 and achieve the effect of clamping and positioning the workpiece at different positions.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An axial positioning device for a CNC machining center, comprising: The base (1) is characterized in that an adjustment mechanism (2) for adjusting the clamping and positioning position is provided on the upper side of the base (1), and a positioning mechanism (3) for axial clamping and positioning is provided on the adjustment mechanism (2). The positioning mechanism (3) includes a mounting block (31), and a support ring (32) is fixedly mounted inside the mounting block (31) by screws. Three sets of support plates (33) are fixedly connected to the right side surface of the support ring (32). Threaded rods (34) pass through the interior of each of the three sets of support plates (33) through bearings. The outer sides of the three sets of threaded rods (34) are all connected by threaded connecting blocks (35), and the lower end of the connecting blocks (35) is fixedly connected to a fixed shaft. The outer side of the fixed shaft is sleeved with a clamping wheel (36) through a bearing. The lower end of the threaded rod (34) is fixedly connected to a fixing block (26), and the outer side of the lower end of the threaded rod (34) is slidably sleeved with an abutment block (39). The lower surface of the abutment block (39) is elastically connected to the fixing block (26) by a spring (391). The upper surface of the abutment block (39) is provided with a rubber anti-slip pad to improve the friction of its surface.

2. The axial positioning device for a CNC machining center as described in claim 1, characterized in that: The clamping wheel (36) is a rubber wheel with a high coefficient of friction on the clamping surface.

3. The axial positioning device for a CNC machining center as described in claim 1, characterized in that: A limiting rod (37) is fixedly connected to the left side surface of the support ring (32), and a guide groove is provided on the connecting block (35). The limiting rod (37) is movably sleeved inside the guide groove of the connecting block (35).

4. The axial positioning device for a CNC machining center as described in claim 1, characterized in that: The adjustment mechanism (2) includes a support block (21), which is fixedly connected to the left and right ends of the base (1). An adjustment screw (22) is sleeved inside the right end of the support block (21) through a bearing. The left end of the adjustment screw (22) passes through the inside of the support block (21) through a bearing. A handle (23) is fixedly connected to the left end of the adjustment screw (22).

5. The axial positioning device for a CNC machining center as described in claim 4, characterized in that: The adjustment mechanism (2) also includes a mounting plate (24), on which sliders (25) are fixedly connected to the front and rear sides of the lower side of the mounting plate (24), and a fixing block (26) is fixedly connected to the middle of the lower surface of the mounting plate (24). The fixing block (26) is screwed onto the outside of the adjustment screw (22) by threads.

6. The axial positioning device for a CNC machining center as described in claim 5, characterized in that: The upper front and rear ends of the base (1) are fixedly connected to slide rails (27), and the slider (25) is slidably fitted into the outside of the slide rails (27).

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