Numerically controlled machine tool machining clamp

Abstract

The present application relates to a kind of numerical control machine tool clamps for machining, including base and clamp body, the top of the base is provided with circular recess, wherein recess inner bottom middle part is provided with screw pipe, and the bottom of base is provided with with screw pipe inner communication's suction pipe, the recess is also provided with circular seat, wherein circular seat bottom is provided with the accommodation groove of being buckled on screw pipe and being screwed with it, and the top of circular seat is provided with the cylinder corresponding to accommodation groove, the clamp body includes the cylinder of being sheathed on base, wherein the inner side wall bottom of cylinder is provided with the circular ring of being embedded in the sliding groove on the outer wall of base, and the inner side wall of cylinder is also provided with the inner tooth ring and annular seat above base, the top of base is provided with the gear meshing with inner tooth ring, wherein gear is driven by motor, the top of cylinder is provided with clamping assembly on both sides. The present application can effectively clamp fixing effect to workpiece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, in particular to a clamp for numerical control machine tool mechanical processing. BACKGROUND

[0002] The clamp is a device used to fix the processing object in the mechanical manufacturing process, so that it occupies the correct position to accept construction or detection. In order to ensure the production quality of products, when the workpiece is processed on the machine tool, in order to make the surface of the workpiece meet the technical requirements such as the size, geometric shape and mutual position accuracy of the drawing, the workpiece must be positioned and clamped tightly before processing, so as to produce qualified products.

[0003] Among them, the existing clamp generally plays the role of clamping and fixing at the same time, and does not have the function of rotating and adjusting the orientation of the processing piece. In order to enhance the stability of the processing piece when it is placed in the clamp for clamping, a supporting mechanism is generally arranged at the bottom of the processing piece to support it. However, this method will cause the height of the processing piece to be fixed by the supporting mechanism and cannot be adjusted. Due to the different thicknesses of the processing pieces, the top end of the processing piece may be too high above the top end of the clamp, or too low below the top end of the clamp, which will affect the processing work of the processing piece. SUMMARY

[0004] The purpose of the present application is to provide a clamp for numerical control machine tool mechanical processing.

[0005] The technical problem of the present application is mainly solved by the following technical scheme:

[0006] A clamp for numerical control machine tool mechanical processing, comprising a base and a clamp body:

[0007] A circular groove is arranged at the top of the base, a screw pipe is arranged at the middle of the bottom of the groove, an air extraction pipe is arranged at the bottom of the base and communicates with the screw pipe, a circular seat is further arranged in the groove, an accommodation groove is arranged at the bottom of the circular seat and screwed with the screw pipe, a cylinder corresponding to the accommodation groove is arranged at the top of the circular seat, a dust removal cavity is arranged in the cylinder, air holes communicating with the outside of the dust removal cavity are uniformly arranged on the side wall of the dust removal cavity, a connecting channel I communicating with the accommodation groove is further arranged at the middle of the dust removal cavity, a polygonal clamping groove is arranged at the top end of the cylinder, a connecting channel II corresponding to the connecting channel I is arranged at the bottom of the clamping groove, a positioning rod is arranged in the screw pipe and extends into the clamping groove through the connecting channel I, the dust removal cavity and the connecting channel II in sequence, and a magnetic cover body with a size suitable for the clamping groove is arranged in the clamping groove and buckled on the top end of the positioning rod;

[0008] The clamp body includes a cylinder fitted onto a base. A ring is provided at the bottom of the inner wall of the cylinder, embedded in a groove on the outer wall of the base. An internal gear ring and an annular seat are also provided on the inner wall of the cylinder, located above the base. A gear meshing with the internal gear ring is provided above the base, driven by a motor. Clamping assemblies are provided on both sides of the top of the cylinder. Each clamping assembly includes a C-shaped plate driven by an electric push rod I. A vertical plate is bent upwards at the top horizontal end of the C-shaped plate. An L-shaped plate is provided on one side of the bottom horizontal end of the C-shaped plate. Multiple sets of horizontal plates are arranged side-by-side on one side of the vertical end of the L-shaped plate. The bottom horizontal end of the C-shaped plate is embedded between two adjacent sets of horizontal plates and fixed with bolts. Multiple sets of rollers, flush with the top of the cylinder, are provided at the top of the horizontal end of the L-shaped plate. A mounting seat is provided at the bottom of the horizontal end of the L-shaped plate, containing a rolling groove with a curved cross-section. A ball bearing with one end extending outwards and abutting against the top surface of the circular seat is located within the rolling groove.

[0009] Preferably, a rim is provided at the top edge of the circular seat, which is located inside the opening of the annular seat, wherein the top surface of the annular seat is inclined, and the bottom end of the top surface of the annular seat is flush with the top of the rim.

[0010] Preferably, the diameter of the positioning rod is smaller than the inner diameter of the connecting channel I, wherein the bottom end of the positioning rod is bent outward and fixedly connected to the inner wall of the spiral tube, and the top of the cover is provided with a handle located in the slot, wherein the cross-section of the inner opening of the cover is polygonal, and the size of the top of the positioning rod is adapted to the size of the inner opening of the cover.

[0011] Preferably, the bottom back of the C-shaped plate is connected to the inner wall of the corresponding cylinder by a limiting component. The limiting component includes two sets of inclined plates that are hinged to the inner wall of the corresponding cylinder and the back of the C-shaped plate. The two sets of inclined plates are of equal length and are hinged and fixed at their bottom ends. The top of the annular seat is provided with an electric push rod II corresponding to the limiting component, wherein the top end of the output shaft of the electric push rod II abuts against the bottom end face of the hinge between the two sets of inclined plates.

[0012] Preferably, an elastic band is provided at the bottom of the hinge between the two sets of inclined plates, wherein the two ends of the elastic band are respectively bonded and fixed to the bottom end face of the corresponding inclined plate.

[0013] Preferably, the internal toothed ring is suspended above the base, wherein a fixing groove for accommodating the motor is provided on the top surface of the base, and the fixing groove is located outside the groove. Multiple sets of annular grooves located inside the cylinder are arranged around the outer surface of the base.

[0014] The beneficial effects of the present invention are: the present invention can effectively adjust the height of the L-shaped plate and the cylinder according to the thickness of the workpiece, so that when the workpiece is clamped and fixed by the clamping assembly, the protruding part of the top of the workpiece exposed above the clamping assembly meets the production requirements. At the same time, the orientation of the workpiece can be changed by rotating the cylinder to drive the clamping assembly to rotate on the cylinder, so as to meet the normal processing requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0018] Figure 4 yes Figure 1 Enlarged view of point B in the middle;

[0019] Figure 5 This is a cross-sectional view of the mounting base in this invention;

[0020] Figure 6 yes Figure 1 Enlarged view of the central cylinder.

[0021] In the diagram: 1. Base, 2. Clamp body, 21. Cylinder, 22. Ring, 23. Internal gear ring, 24. Gear, 25. Motor, 26. Clamping assembly, 261. Electric push rod I, 262. C-shaped plate, 263. Vertical plate, 264. L-shaped plate, 265. Horizontal plate, 266. Bolt, 267. Roller assembly, 268. Mounting seat, 269. Ball bearing, 27. Ring seat, 3. Groove, 4. Screw tube, 5. Air extraction pipe, 6. Circular seat, 7. Receiving groove, 8. Cylinder, 9. Dust removal chamber, 10. Vent hole, 11. Connecting channel I, 12. Slot, 13. Connecting channel II, 14. Positioning rod, 15. Cover, 16. Edge, 17. Limiting assembly, 171. Inclined plate, 172. Electric push rod II. Detailed Implementation

[0022] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0023] Example 1:

[0024] A fixture for machining on a CNC machine tool includes a base 1 and a fixture body 2.

[0025] The base 1 has a circular groove 3 at its top, with a screw tube 4 at the bottom center of the groove 3. The base 1 also has an exhaust pipe 5 at its bottom that communicates with the screw tube 4. The groove 3 also has a circular seat 6, with a receiving groove 7 at its bottom that is screwed onto the screw tube 4. The circular seat 6 has a cylinder 8 at its top that corresponds to the receiving groove 7. The cylinder 8 has a dust removal chamber 9, with ventilation holes 10 evenly distributed on its sidewalls that communicate with its outer side. The dust removal chamber 9 also has a connecting channel I11 at its center that communicates with the receiving groove 7. The cylinder 8 has a polygonal slot 12 at its top, with a connecting channel II13 at its bottom that corresponds to the connecting channel I11. The screw tube 4 has a positioning rod 14 whose top end passes through the connecting channel I11, the dust removal chamber 9, and the connecting channel II13 in sequence and extends into the slot 12. The slot 12 has a magnetic cover 15 that is the same size as the positioning rod 14 and is fastened to the top of the positioning rod 14.

[0026] The clamp body 2 includes a cylinder 21 fitted onto a base 1. A ring 22 is provided at the bottom of the inner wall of the cylinder 21, embedded in a groove on the outer wall of the base 1. An internal gear ring 23 and an annular seat 27 are also provided on the inner wall of the cylinder 21 above the base 1. A gear 24 meshing with the internal gear ring 23 is provided above the base 1, and the gear 24 is driven by a motor 25. Clamping assemblies 26 are provided on both sides of the top of the cylinder 21. Each clamping assembly 26 includes a U-shaped plate 262 driven by an electric push rod I261, and a vertical plate 263 is bent upwards at the top horizontal end of the U-shaped plate 262. An L-shaped plate 264 is provided on one side of the bottom horizontal end of the plate 262. Multiple sets of horizontal plates 265 are arranged side by side on one side of the vertical end of the L-shaped plate 264. The bottom horizontal end of the L-shaped plate 262 is embedded between two adjacent sets of horizontal plates 265 and fixed by bolts 266. Multiple sets of rollers 267 are provided on the top of the horizontal end of the L-shaped plate 264, which are flush with the top of the cylinder 8. A mounting base 268 is provided on the bottom of the horizontal end of the L-shaped plate 264. A rolling groove with an arc-shaped cross section is provided in the mounting base 268. A ball 269 with one end extending to the outside and abutting against the top surface of the circular seat 6 is provided in the rolling groove.

[0027] In this embodiment, a rim 16 is provided at the top edge of the circular seat 6, which is located inside the opening of the annular seat 27. The top surface of the annular seat 27 is inclined, and the bottom of the top surface of the annular seat 27 is flush with the top of the rim 16.

[0028] The edge 16 prevents impurities from falling off the top of the circular seat 6 along its edge. Impurities that fall onto the inclined surface of the annular seat 27 during processing are more likely to fall along the inclined surface. When the edge 16 is at the bottom of the annular seat 27, the impurities on its inclined surface can be guided into the circular seat 6 inside the edge 16 and then extracted by components such as the vent hole 10 and the dust removal chamber 9.

[0029] In this embodiment, the diameter of the positioning rod 14 is smaller than the inner diameter of the connecting channel I11. The bottom end of the positioning rod 14 is bent outward and fixedly connected to the inner wall of the screw tube 4. The top of the cover 15 is provided with a handle located in the slot 12. The internal opening of the cover 15 has a polygonal cross section, and the size of the top of the positioning rod 14 is adapted to the size of the internal opening of the cover 15.

[0030] This design ensures that the magnetic cover 15 is not easily slipped out after being magnetically attached to the inner wall of the metal slot 12. Simultaneously, the top side wall of the positioning rod 14 abuts against the inner wall of the opening of the cover 15, causing the outer wall of the cover 15 to abut against the side wall of the slot 12. This effectively prevents the circular seat 6 from rotating within the screw tube 4 due to external vibrations, thus changing the height of the circular seat 6 and affecting its supporting role on the workpiece. This method suspends and fixes the circular seat 6 at a high position to prevent its position from changing and affecting subsequent workpiece processing.

[0031] In this embodiment, the internal gear ring 23 is suspended above the base 1. The top surface of the base 1 is provided with a fixing groove for accommodating the motor 25, and the fixing groove is located outside the groove 3. Multiple sets of annular grooves located inside the cylinder 21 are arranged around the outer surface of the base 1.

[0032] The method of using this invention is as follows: The height of the circular seat 6 and the cylinder 8 can be adjusted according to the thickness of the workpiece. Specifically, by pulling out the cover 15 from the slot 12, the cylinder 8 can be rotated to drive the receiving groove 7 in the circular seat 6 to rotate on the screw tube 4, thereby causing the circular seat 6 to move up and down within the groove 3, effectively changing the height of the cylinder 8. At the same time, the L-shaped plate 264 is installed on the corresponding U-shaped plate 262, wherein the L-shaped plate 264 drives the ball bearings on the corresponding mounting base 268. While 269 slides on the top surface of the circular seat 6, it will cause the opening formed between the two adjacent sets of horizontal plates 265 to snap onto the bottom horizontal end of the C-shaped plate 262. Then, the horizontal plate 265 and the C-shaped plate 262 are locked and fixed by bolts 266, so that the top of the roller group 267 is flush with the top of the cylinder 8. The circular seat 6 supports and fixes the L-shaped plate 264 and the C-shaped plate 262 through the ball bearings 269 and the mounting base 268. Finally, the cover 15 is inserted into the slot 12 and snapped onto the positioning rod 14.

[0033] During use, the workpiece is placed above the cylinder 8 inside the cylinder 21. At this time, the electric push rod I261 drives the U-shaped plate 262 to move the vertical plate 263 and the L-shaped plate 264 toward the workpiece. The roller assembly 267 slides to the bottom surface of the workpiece, and the L-shaped plate 264 drives the ball bearings 269 to slide on the rolling groove and the top surface of the circular seat 6. When the roller assembly 267 contacts the bottom surface of the workpiece, it continues to move under the influence of the pushing force, which causes the roller assembly 267 to rotate on the bottom surface of the workpiece. This allows the roller assembly 267 and the L-shaped plate 264 to move while reducing the contact area with the bottom surface of the workpiece and providing support for the bottom surface of the workpiece. Finally, the vertical plate 263 and the L-shaped plate 264 on the left and right sides can clamp and fix the workpiece located at the top of the cylinder 8 for subsequent processing.

[0034] When it is necessary to change the orientation of the workpiece for fine processing, the motor 25 drives the internal gear ring 23 to rotate through the gear 24. The internal gear ring 23 drives the workpiece to rotate on the top surface of the cylinder 8 through the cylinder 21 and the clamping assembly 26, thereby effectively changing the orientation of the workpiece to facilitate its processing. During the rotation of the L-shaped plate 264, the ball bearings 269 on the mounting base 268 will rotate on the rolling groove and the top surface of the circular seat 6, which indirectly supports the clamping assembly 26 and the workpiece while facilitating their rotation.

[0035] After the base 1 is installed on the CNC machine tool, the air pipe is connected to the air extraction pipe 5. The strong airflow can be used to extract the debris that falls into the cylinder 21 during the processing of the workpiece through the air extraction pipe 5, the spiral pipe 4, the connecting channel I11, the dust removal chamber 9 and the vent 10, thereby achieving the dust removal effect.

[0036] Example 2:

[0037] A fixture for machining on a CNC machine tool is basically the same as that in Embodiment 1, except that the bottom back of the C-shaped plate 262 is connected to the inner wall of the corresponding cylinder 21 by a limiting component 17. The limiting component 17 includes two sets of inclined plates 171 that are hinged to the inner wall of the corresponding cylinder 21 and the back of the C-shaped plate 262. The two sets of inclined plates 171 are of equal length and their bottom ends are hinged and fixed. The top of the annular seat 27 is provided with an electric push rod II 172 corresponding to the limiting component 17. The top end of the output shaft of the electric push rod II 172 abuts against the bottom end face of the hinge between the two sets of inclined plates 171.

[0038] Meanwhile, an elastic band is provided at the bottom of the hinge between the two sets of inclined plates 171, and the two ends of the elastic band are respectively bonded and fixed to the bottom end surface of the corresponding inclined plate 171.

[0039] When the electric push rod I261 drives the C-shaped plate 262 and other components to move towards the workpiece and clamp and fix them, it will pull the inclined plate 171 so that it rotates around the hinge between the two sets of inclined plates 171 as the center, thereby increasing the included angle formed between the two sets of inclined plates 171. At this time, the electric push rod II172 moves upward to support the bottom end of the hinge of the two sets of inclined plates 171 after unfolding, preventing the included angle between the two sets of inclined plates 171 from shrinking, thereby pushing the C-shaped plate 262 and L-shaped plate 264 components to further clamp the workpiece.

[0040] During the above process, due to the fixing force of the limiting component 17, the clamping component 26 can be effectively prevented from being subjected to the vibration force generated during the processing of the workpiece, which would cause the output shaft of the electric push rod I261 to retract, thereby driving the C-shaped plate 262 and L-shaped plate 264 and other components to move, thus causing the clamping component 26 to fail to effectively clamp and fix the workpiece.

[0041] The present invention can effectively adjust the height of the L-shaped plate 264 and the cylinder 8 according to the thickness of the workpiece. Thus, when the workpiece is clamped and fixed by the clamping assembly 26, the protruding part of the top of the workpiece exposed above the clamping assembly 26 meets the production requirements. At the same time, the orientation of the workpiece can be changed by rotating the cylinder 21 to drive the clamping assembly 26 to rotate on the cylinder 8, so as to meet the normal processing requirements.

[0042] The present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A fixture for machining on a CNC machine tool, comprising a base and a fixture body, characterized in that: The base has a circular groove at the top, with a spiral tube at the bottom center of the groove. A suction pipe communicating with the spiral tube is located at the bottom of the base. A circular seat is also located within the groove, with a receiving groove at the bottom that screws onto the spiral tube. A cylinder corresponding to the receiving groove is located at the top of the circular seat. A dust removal chamber is located within the cylinder, with ventilation holes evenly distributed on its sidewalls. A connecting channel I communicating with the receiving groove is located in the middle of the dust removal chamber. A polygonal slot is located at the top of the cylinder, with a connecting channel II corresponding to connecting channel I at the bottom. A positioning rod, whose top end passes sequentially through connecting channel I, the dust removal chamber, and connecting channel II, extends into the slot within the spiral tube. A magnetic cover of the same size is located within the slot and is fastened to the top of the positioning rod. The clamp body includes a cylinder fitted onto a base. A ring is provided at the bottom of the inner wall of the cylinder, embedded in a groove on the outer wall of the base. An internal gear ring and an annular seat are also provided on the inner wall of the cylinder, located above the base. A gear meshing with the internal gear ring is provided above the base, driven by a motor. Clamping assemblies are provided on both sides of the top of the cylinder. Each clamping assembly includes a C-shaped plate driven by an electric push rod I. A vertical plate is bent upwards at the top horizontal end of the C-shaped plate. An L-shaped plate is provided on one side of the bottom horizontal end of the C-shaped plate. Multiple sets of horizontal plates are arranged side-by-side on one side of the vertical end of the L-shaped plate. The bottom horizontal end of the C-shaped plate is embedded between two adjacent sets of horizontal plates and fixed with bolts. Multiple sets of rollers, flush with the top of the cylinder, are provided at the top of the horizontal end of the L-shaped plate. A mounting seat is provided at the bottom of the horizontal end of the L-shaped plate, containing a rolling groove with a curved cross-section. A ball bearing with one end extending outwards and abutting against the top surface of the circular seat is located within the rolling groove.

2. The fixture for CNC machine tool machining according to claim 1, characterized in that: The circular seat has a rim around its top edge that is located inside the opening of the annular seat. The top surface of the annular seat is inclined, and the bottom of the top surface of the annular seat is flush with the top of the rim.

3. A fixture for CNC machine tool machining according to claim 1, characterized in that: The diameter of the positioning rod is smaller than the inner diameter of the connecting channel I. The bottom end of the positioning rod is bent outward and fixedly connected to the inner wall of the spiral tube. The top of the cover is provided with a handle located in the slot. The internal opening of the cover has a polygonal cross section, and the size of the top of the positioning rod is adapted to the size of the internal opening of the cover.

4. A fixture for CNC machine tool machining according to claim 1, characterized in that: The bottom back of the C-shaped plate is connected to the inner wall of the corresponding cylinder by a limiting component. The limiting component includes two sets of inclined plates that are hinged to the inner wall of the corresponding cylinder and the back of the C-shaped plate. The two sets of inclined plates are of equal length and are hinged and fixed at their bottom ends. The top of the annular seat is provided with an electric push rod II corresponding to the limiting component. The top end of the output shaft of the electric push rod II abuts against the bottom end face of the hinge between the two sets of inclined plates.

5. A fixture for CNC machine tool machining according to claim 4, characterized in that: An elastic band is provided at the bottom of the hinge between the two sets of inclined plates, and the two ends of the elastic band are respectively bonded and fixed to the bottom end face of the corresponding inclined plate.

6. A fixture for CNC machine tool machining according to claim 1, characterized in that: The internal gear ring is suspended above the base, and a fixing groove for accommodating the motor is provided on the top surface of the base, with the fixing groove located outside the groove. Multiple sets of annular grooves located inside the cylinder are arranged around the outer surface of the base.

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