Spring chuck clamping mechanism of numerical control lathe

Abstract

The utility model discloses a collet chuck clamping mechanism of a numerically controlled lathe, which relates to the technical field of machine tool fixtures, and comprises a numerically controlled lathe, a spindle box is arranged at the end part of the inner side of the numerically controlled lathe, and a machine tool tip is correspondingly arranged at the other end of the inner side of the numerically controlled lathe; the end part of the spindle box is fixedly connected with a connecting seat; the end, away from the spindle box, of the connecting base is fixedly connected with a fixing buckle, the side face of the fixing buckle is movably connected with an annular jacking device in a rectangular array mode, the end of the fixing buckle is provided with a spring chuck, and the inner side of the spring chuck is movably connected with an adjustable jacking rod. The adjustable ejector rod limits the end of a workpiece, adjusts the distance of the workpiece on the inner side of the spring chuck, prevents the workpiece from axially moving during machining, is matched with a machine tool tip to clamp the two ends of the workpiece at the same time, and is matched with axial positioning of the spring chuck, so that the clamping effect on the workpiece is further improved.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of machine tool clamps, in particular to a spring collet clamping mechanism for a numerically controlled lathe. Background Art

[0002] The spring chuck of a CNC lathe is a commonly used clamping tool on a CNC lathe. A CNC lathe is a high-precision, high-efficiency automated machine tool, generally used for cutting sleeve-type parts. Before use, the sleeve-type parts need to be fixed to the spring chuck at the end of the machine output shaft. By tightening the nut, the elastic sleeve contracts and clamps the workpiece. When the nut is loosened, the elastic sleeve returns to its original shape under its own elastic action, loosening the workpiece.

[0003] However, in practice, people have noticed that the lathe spindle drives the spring chuck to rotate rapidly, which will generate a high centrifugal force. If the workpiece is long, it is easy for the unfixed end to deflect, and when the machine tool top is tightened, it will exert axial thrust on the workpiece. The spring chuck at the other end can only play an axial positioning role, and cannot play a good axial positioning role, which can easily cause the workpiece to deviate axially. In addition, if the clamping force of the spring chuck is too strong, it is easy to leave scratches on the workpiece surface, affecting the accuracy of the workpiece. Utility Model Content

[0004] The purpose of this utility model is to provide a chuck clamping mechanism for a CNC lathe. The mechanism squeezes the ends of a workpiece through the cooperation between an adjustable push rod 12 and a machine tool center 10, thereby positioning the workpiece. Simultaneously, the mechanism pushes a bending plate 112 to move. The bending plate 112 cooperates with a movable push rod 113 to push a conical locking sleeve 8 to move. The mechanism circumferentially positions the workpiece through the inclined surface of the conical locking sleeve 8 and the chuck 9, thereby improving the grip on the workpiece and preventing scratches on the workpiece surface caused by excessive clamping force. The mechanism solves the technical problems raised in the above-mentioned background art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A spring chuck clamping mechanism for a CNC lathe comprises a CNC lathe, a spindle box being mounted on an inner end of the CNC lathe, a machine tool center being mounted on the other inner end of the CNC lathe, and a connecting seat being fixedly connected to the end of the spindle box;

[0007] The connecting seat is fixedly connected to a fixing buckle at one end away from the spindle box, and the side of the fixing buckle is movably connected to an annular tightener in a rectangular array. A spring chuck is installed at the end of the fixing buckle, and an adjustable push rod is movably connected to the inner side of the spring chuck.

[0008] As a further technical solution of the present invention, the fixing buckle includes two symmetrically arranged split-type sockets, and a receiving groove is symmetrically opened on the side of any one of the split-type sockets, and the inner side of the receiving groove is prevented from having a long bolt; the end of the long bolt passes through the receiving groove and is threadedly connected to the split-type socket.

[0009] As a further technical solution of the present invention, each of the split card holders is provided with through holes in a circular array, and the side surfaces of the split card holder are fixedly connected to the connecting seat;

[0010] The side surface of the connecting seat is integrally provided with four connecting columns arranged in a rectangular array, and the ends of the connecting columns are fixedly connected to the split-type card seat by bolts.

[0011] As a further technical solution of the present invention, the end of the spring chuck is integrally provided with a locking boss, and the split-type clamping seat is clamped on the outer side of the locking boss;

[0012] An arc-shaped slot is provided on the inner side of one end of the split-type clamping seat close to the spring clamp, and a locking boss on the end of the spring clamp is located on the inner side of the arc-shaped slot.

[0013] As a further technical solution of the present invention, each group of the annular tighteners includes a bending turn plate, both sides of which are movably connected with fixed ear plates, and the ends of the fixed ear plates are fixedly connected to the sides of the split-type socket in an annular array.

[0014] As a further technical solution of the present invention, the end of the bending plate is symmetrically provided with a pin plate, the end of the bending plate is provided with a matching slide groove corresponding to the pin plate, and the pin plate is slidably connected to the matching slide groove.

[0015] As a further technical solution of the present invention, a movable push rod is integrally provided at the end of the pin plate, a through hole corresponding to the movable push rod is opened on the split-type socket, and the end of the movable push rod passes through the through hole and fits against the side of the conical locking sleeve.

[0016] As a further technical solution of the present invention, the conical locking sleeve is sleeved on the outer side of the spring collet, and the inner side of the conical locking sleeve and the outer side of the spring collet are respectively inclined.

[0017] As a further technical solution of the present invention, the adjustable push rod includes a sliding sleeve arranged in a stepped shape, and a limiting slider is arranged in a ring array at one end of the sliding sleeve. The sliding sleeve passes through the two split-type sockets, and the limiting slider is slidably connected to the matching slide groove.

[0018] As a further technical solution of the present invention, the end of the sliding sleeve is integrally provided with a conical platform, the bending turning plates are arranged in a ring array on the side of the conical platform, and the ends of the bending turning plates are in contact with the conical platform.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The utility model, when the adjustable push rod moves, pushes the end of the bending turn plate to rotate, and the other end of the bending turn plate pushes the conical locking sleeve to move, thereby clamping the spring collet, and the annular tightening devices are arranged in an annular array. As long as any one of the annular tightening devices is tightened, the spring collet can be clamped, thereby improving the clamping effect of the workpiece and preventing the spring collet from leaving scratches on the workpiece surface due to excessive clamping force.

[0021] The utility model can limit the end of the workpiece with an adjustable ejector rod, adjust the distance between the workpiece and the inner side of the spring collet, and prevent the workpiece from axial movement during processing. It cooperates with the machine tool center to clamp both ends of the workpiece at the same time, and cooperates with the axial positioning of the spring collet to further improve the clamping effect of the workpiece.

[0022] The utility model has a split-type split clamping seat which is convenient for workers to disassemble and fix the spring collet. When the spring collet is damaged, the spring collet can be easily disassembled from the end of the spindle box for replacement, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model in use state.

[0024] Figure 2 This utility model Figure 1 A partial enlarged schematic diagram.

[0025] Figure 3 This utility model Figure 1 A partial enlarged schematic diagram.

[0026] Figure 4 This utility model Figure 1 Schematic diagram of part of the structure.

[0027] Figure 5 This utility model Figure 4 Another perspective of the picture.

[0028] Figure 6 This utility model Figure 4 Schematic diagram of the internal structure.

[0029] Figure 7 It is a schematic diagram of the position structure of the annular tightener and the adjustable ejector rod in the utility model.

[0030] Figure 8 This utility model Figure 7 Another perspective of the picture.

[0031] Figure 9 It is a schematic diagram of the three-dimensional structure of the spring chuck in the utility model.

[0032] Figure 10 It is a schematic diagram of the three-dimensional structure of the fixing buckle in the utility model.

[0033] Figure 11 This utility model Figure 10 A partial enlarged schematic diagram.

[0034] Figure 12 It is a schematic diagram of the cooperation between the annular tightener and the adjustable ejector rod in the utility model.

[0035] Figure 13 This utility model Figure 12 Left view of .

[0036] In the picture:

[0037] CNC lathe 1, slide 2, slide box 3, tool holder 4, spindle box 5, connecting seat 6, fixing buckle 7, split card holder 71, through hole 72, receiving groove 73, arc-shaped card slot 74, limit slot 75, conical locking sleeve 8, spring chuck 9, locking boss 91, machine tool center 10, annular tightener 11, fixed ear plate 111, bending turn plate 112, movable ejector 113, matching slide 114, pin plate 115, adjustable ejector 12, sliding sleeve 121, limit slider 122, conical table 123, threaded ejector 124, baffle 125. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figure 1-13 The embodiment of the utility model provides a spring collet clamping mechanism for a CNC lathe, comprising a CNC lathe 1, a spindle box 5 is installed at the end of the inner side of the CNC lathe 1, and a machine tool center 10 is correspondingly installed at the other end of the inner side of the CNC lathe 1, and a connecting seat 6 is fixedly connected to the end of the spindle box 5;

[0040] The connecting seat 6 is fixedly connected to a fixing buckle 7 at one end away from the spindle box 5. The side of the fixing buckle 7 is movably connected to an annular tightener 11 in a rectangular array. A spring chuck 9 is installed at the end of the fixing buckle 7, and an adjustable push rod 12 is movably connected to the inner side of the spring chuck 9.

[0041] In this embodiment, the fixing buckle 7 includes two symmetrically arranged split-type sockets 71, and a receiving groove 73 is symmetrically opened on the side of any one of the split-type sockets 71, and the inner side of the receiving groove 73 is prevented from having a long bolt; the end of the long bolt passes through the receiving groove 73 and is threadedly connected to the split-type socket 71.

[0042] In this embodiment, each of the split card holders 71 is provided with through holes 72 in a circular array, and the side surfaces of the split card holders 71 are fixedly connected to the connecting seat 6;

[0043] The side surface of the connecting seat 6 is integrally provided with four connecting columns arranged in a rectangular array, and the ends of the connecting columns are fixedly connected to the split-type clamping seat 71 by bolts.

[0044] In this embodiment, the end of the spring chuck 9 is integrally provided with a locking boss 91, and the split clamping seat 71 is clamped on the outer side of the locking boss 91;

[0045] An arc-shaped slot 74 is formed on the inner side of one end of the split clamp 71 close to the spring clamp 9 , and a locking boss 91 on the end of the spring clamp 9 is located on the inner side of the arc-shaped slot 74 .

[0046] In this embodiment, each group of the annular tighteners 11 includes a bending plate 112, and both sides of the bending plate 112 are movably connected to fixed ear plates 111, and the ends of the fixed ear plates 111 are fixedly connected to the side surfaces of the split-type socket 71 in an annular array.

[0047] In this embodiment, a pin plate 115 is symmetrically provided at the end of the bending plate 112, and a matching groove 114 corresponding to the pin plate 115 is opened at the end of the bending plate 112, and the pin plate 115 is slidably connected to the matching groove 114.

[0048] In this embodiment, the end of the pin plate 115 is integrally provided with a movable push rod 113, and a through hole 72 corresponding to the movable push rod 113 is opened on the split-type holder 71, and the end of the movable push rod 113 passes through the through hole 72 and fits with the side of the conical locking sleeve 8.

[0049] In this embodiment, the conical locking sleeve 8 is sleeved on the outer side of the spring collet 9, and the inner side of the conical locking sleeve 8 and the outer side of the spring collet 9 are respectively inclined.

[0050] In this embodiment, the adjustable push rod 12 includes a sliding sleeve 121 arranged in a stepped shape, and a limiting slider 122 is arranged in a ring array at one end of the sliding sleeve 121. The sliding sleeve 121 passes through the two split-type sockets 71, and the limiting slider 122 is slidably connected to the mating slide groove 114.

[0051] In this embodiment, a conical platform 123 is integrally provided at the end of the sliding sleeve 121 , and the bending plates 112 are arranged in a circular array on the side of the conical platform 123 , and the ends of the bending plates 112 are in contact with the conical platform 123 .

[0052] By adopting the above technical solution, the workpiece is placed from the end of the spring chuck 9, and the end of the workpiece pushes the adjustable push rod 12 to move. When the adjustable push rod 12 moves to the left, it pushes the end of the bending turn plate 112 to move. Since the bending turn plate 112 is movably connected to the split-type clamping seat 71 through the fixed ear plate 111, when the end of the bending turn plate 112 moves, the other end of the bending turn plate 112 pushes the movable push rod 113 to move in the opposite direction through the pin plate 115, and the movable push rod 113 moves on the inner side of the through hole 72, pushing the conical locking sleeve 8 to move toward the end of the spring chuck 9, and the spring chuck 9 is retracted, so that the spring chuck 9 moves inward, and the workpiece inside the spring chuck 9 is clamped. In combination with the tightening of the machine tool top 10, the vibration generated during cutting of the workpiece can be prevented from affecting the locking of the workpiece, thereby improving the effect on the workpiece.

[0053] In this embodiment, the sliding sleeve 121 is movably connected to a threaded push rod 124 at one end away from the limiting slider 122. One end of the threaded push rod 124 is threadedly connected to the sliding sleeve 121, and the other end is integrally provided with a baffle 125. By rotating the threaded push rod 124, the position of the baffle 125 can be adjusted through the threaded cooperation between the threaded push rod 124 and the sliding sleeve 121, thereby adapting to workpieces of different lengths.

[0054] In this embodiment, a cavity with two through ends is provided on the inner side of the spring chuck 9, and the end of the sliding sleeve 121 extends through the spring chuck 9 to the inner side of the cavity. The end of the workpiece is placed in the cavity of the spring chuck 9, and the end face of the workpiece is fitted with the adjustable push rod 12, pushing the adjustable push rod 12 to slide on the inner side of the spring chuck 9.

[0055] In this embodiment, a cross groove is provided on the side of the baffle 125 away from the threaded push rod 124. The tool is inserted into the cross groove from the short plate of the spring chuck 9, and then the threaded push rod 124 is driven to rotate by the baffle 125, thereby facilitating the disassembly of the adjustable push rod 12.

[0056] In this embodiment, the CNC lathe 1 is further provided with a metal screw, which is transmission-connected to a slide box 3 , which is located on the side of the slide rail 2 , and a tool holder 4 is fixedly connected to the top of the slide box 3 .

[0057] In this embodiment, the inner threaded adjustment rod of the slide rail 2 is threadedly matched with the bottom of the machine tool center 10, and the bottom of the machine tool center 10 is slidably connected to the slide rail 2.

[0058] The working principle of the present utility model is as follows: when in use, first put the workpiece into the inner side of the spring chuck 9, then rotate the threaded adjusting rod, and the threaded adjusting rod cooperates with the thread at the bottom of the machine tool top 10 to make the machine tool top 10 move along the outer side of the slide rail 2, and the end of the machine tool top 10 fits in the center position of the end of the workpiece, and pushes the workpiece to move toward the inner side of the spring chuck 9, and the workpiece pushes the adjustable push rod 12 to move to the left, and the tapered platform 123 in the adjustable push rod 12 pushes the end of the bending turn plate 112 to move, and due to the bending turn plate 112 and the fixed ear plate 111 The two ends of the cam 113 are connected by a pin, so the end of the bending rotating plate 112 rotates to the left, and the other end of the bending rotating plate 112 pushes the movable push rod 113 to move to the right through the pin plate 115. The movable push rod 113 slides on the inner side of the through hole 72, and the end of the movable push rod 113 pushes the conical locking sleeve 8 to move. Since the inner side of the conical locking sleeve 8 and the outer side of the spring chuck 9 are respectively inclined, the conical locking sleeve 8 can push the spring chuck 9 to retract inward when it moves, thereby clamping the workpiece. The structure is simple, the operation is very convenient, and the labor intensity is effectively reduced.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A spring chuck clamping mechanism for a CNC lathe, characterized by: A CNC lathe (1) is provided, wherein a spindle box (5) is installed at an inner end of the CNC lathe (1), and a machine tool top (10) is correspondingly installed at the other inner end of the CNC lathe (1), and a connecting seat (6) is fixedly connected to the end of the spindle box (5); The end of the connecting seat (6) away from the spindle box (5) is fixedly connected to a fixing buckle (7), the side of the fixing buckle (7) is movably connected to an annular tightening device (11) in a rectangular array, the end of the fixing buckle (7) is installed with a spring clamp (9), and the inner side of the spring clamp (9) is movably connected to an adjustable push rod (12).

2. The spring chuck clamping mechanism for a CNC lathe according to claim 1, characterized in that: The fixing buckle (7) includes two symmetrically arranged split-type clamping seats (71), and a receiving groove (73) is symmetrically opened on the side of any one of the split-type clamping seats (71), and the inner side of the receiving groove (73) is prevented from having a long bolt; the end of the long bolt passes through the receiving groove (73) and is threadedly connected to the split-type clamping seat (71).

3. The spring chuck clamping mechanism for a CNC lathe according to claim 2, characterized in that: Each of the split-type card holders (71) is provided with through holes (72) in a circular array, and the side surfaces of the split-type card holder (71) are fixedly connected to the connecting seat (6); The side surface of the connecting seat (6) is integrally provided with four connecting columns arranged in a rectangular array, and the ends of the connecting columns are fixedly connected to the split-type card seat (71) by bolts.

4. The spring chuck clamping mechanism for a CNC lathe according to claim 3, characterized in that: The end of the spring chuck (9) is integrally provided with a locking boss (91), and the split-type clamping seat (71) is clamped on the outer side of the locking boss (91); An arc-shaped slot (74) is provided on the inner side of one end of the split-type holder (71) close to the spring clamp (9), and a locking boss (91) at the end of the spring clamp (9) is located on the inner side of the arc-shaped slot (74).

5. The spring chuck clamping mechanism for a CNC lathe according to claim 1, characterized in that: Each group of the annular tighteners (11) includes a bending plate (112), both sides of which are movably connected to fixed ear plates (111), and the ends of the fixed ear plates (111) are fixedly connected to the side surfaces of the split-type card seat (71) in an annular array.

6. The spring chuck clamping mechanism for a CNC lathe according to claim 5, characterized in that: The end of the bending plate (112) is symmetrically provided with a pin plate (115), and the end of the bending plate (112) is provided with a matching slide groove (114) corresponding to the pin plate (115), and the pin plate (115) is slidably connected to the matching slide groove (114).

7. The spring collet clamping mechanism for a CNC lathe according to claim 6, characterized in that: The end of the pin plate (115) is integrally provided with a movable push rod (113), a through hole (72) corresponding to the movable push rod (113) is opened on the split card seat (71), and the end of the movable push rod (113) passes through the through hole (72) and fits with the side surface of the conical locking sleeve (8).

8. The spring chuck clamping mechanism for a CNC lathe according to claim 7, characterized in that: The conical locking sleeve (8) is sleeved on the outer side of the spring chuck (9), and the inner side of the conical locking sleeve (8) and the outer side of the spring chuck (9) are respectively inclined.

9. The spring collet clamping mechanism for a CNC lathe according to claim 2, characterized in that: The adjustable push rod (12) includes a sliding sleeve (121) arranged in a stepped manner, and a limiting slider (122) is arranged in a ring array at one end of the sliding sleeve (121). The sliding sleeve (121) passes through the two split-type holders (71), and the limiting slider (122) is slidably connected to the matching slide groove (114).

10. The spring collet clamping mechanism for a CNC lathe according to claim 9, characterized in that: The end of the sliding sleeve (121) is integrally provided with a conical platform (123), the bending plate (112) is arranged in a ring array on the side of the conical platform (123), and the end of the bending plate (112) is fitted with the conical platform (123).

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