Numerical control lathe fixture

Abstract

The utility model relates to the technical field of lathe fixtures, in particular to a numerical control lathe fixture which comprises a fixture body, a clamping mechanism and a connecting mechanism. The clamp body is of a cylindrical structure, the middle of the clamp body penetrates through the opening along the central axis of the clamp body, and the clamping mechanism and the connecting mechanism are connected to the two ends of the clamp body respectively. The clamping mechanism comprises an upper clamping block, a lower clamping block, a pressing block and an adjusting bolt, the upper clamping block and the lower clamping block are arranged on the upper side and the lower side of the clamp body respectively, the adjusting bolt is arranged in the upper clamping block, the clamping stability of the clamp is further enhanced, the pressing block is adjusted by twisting the adjusting bolt, and the clamping stability of the clamp is improved. Therefore, on the premise that the pressing block stably clamps the workpiece to be machined, the clamp is convenient to adjust and operate.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe clamps, in particular to a CNC lathe clamp. Background Art

[0002] At present, when using CNC lathes for product processing, clamps are generally installed on the lathe pull rods to clamp the workpiece to be processed. However, in the existing technology, clamps and chucks are generally used to clamp the workpiece directly. This clamping method is not stable. During the product processing, the force exerted on the product itself will be transmitted to the clamp, resulting in unbalanced force on the product and unstable positioning, which may cause the product to move, deviation in processing, or even the product to break away from the clamp, causing damage to the CNC lathe. If a large counterweight clamp is used to improve the clamping performance, it will be inconvenient to install the workpiece or to disassemble and adjust the clamp.

[0003] Chinese patent publication CN212526872U discloses a positioning assembly for an automotive fixture. Pulling a pull block causes a limit rod to move outward from the positioning rod, thereby removing the vertical position restriction on the fixture base and facilitating disassembly. However, the document does not disclose how to address the issue of forces acting on the product itself being transmitted to the fixture, resulting in unbalanced force on the product and unstable positioning.

[0004] To sum up, how to design a CNC lathe fixture that can firmly clamp the product and prevent the product from moving or even falling out of the fixture, while facilitating the installation, disassembly and adjustment of the workpiece, has become a problem that needs to be solved at present. Utility Model Content

[0005] The purpose of this utility model is to provide a CNC lathe fixture to solve the above problems.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] A CNC lathe fixture is used in conjunction with a lathe drawbar and a workpiece to be machined, comprising: a fixture body, a clamping mechanism, and a connecting mechanism;

[0008] The clamp body is a cylindrical structure, the middle part of the clamp body is provided with an opening along its central axis, and the clamping mechanism and the connecting mechanism are respectively connected to both ends of the clamp body;

[0009] The clamping mechanism includes an upper clamping block, a lower clamping block, a pressure block and an adjusting bolt, wherein the upper clamping block and the lower clamping block are respectively arranged on the upper and lower sides of the clamp body, the screw head of the adjusting bolt is arranged on the upper clamping block, and the screw portion thereof passes through the upper clamping block, and the pressure block is correspondingly located below the screw portion of the adjusting bolt, and is penetrated by a stepped hole from top to bottom, the aperture of the upper end portion of the stepped hole is larger than the aperture of the lower end portion thereof, and the upper end portion thereof is provided with an internal thread and is threadedly connected to the screw portion of the adjusting bolt;

[0010] The connecting mechanism is used to connect the lathe pull rod.

[0011] Preferably, the upper end surface of the upper clamping block is provided with a bolt groove, the adjusting bolt is a hexagonal cylindrical head bolt, the adjusting bolt is limitedly set in the bolt groove, and has the freedom to rotate around its central axis.

[0012] Preferably, the clamping mechanism also includes a lower adjustment plate and a positioning block, the lower adjustment plate is arranged on the inner wall of the clamp body, the bottom surface of the lower clamping block is in contact with the top surface of the lower adjustment plate, and both are bolted to the clamp body, a first protrusion is provided on the top surface of the lower clamping block, and the positioning block is arranged on the first protrusion for positioning the workpiece to be processed.

[0013] Preferably, the connecting mechanism includes a pull rod joint, a connecting sleeve, a flange, an inner support sleeve, an outer support sleeve, a pull plate, a support rod and a retaining ring. The pull rod joint is a hollow cylindrical structure, and the inner side wall of the pull rod joint is evenly provided with internal threads. One end of the pull rod joint is threadedly connected to the connecting sleeve, and the other end can be threadedly connected to the lathe pull rod. One end face of the flange is fixedly connected to the end face of the fixture body, and the other end face is fixedly connected to the outer support sleeve. The pull plate limiter is arranged in the inner cavity of the fixture body, one end of which extends outward and is provided with a groove radially outward. The middle part of the connecting sleeve is configured to protrude radially outward and is correspondingly arranged in the groove. The retaining ring is arranged between the connecting sleeve and the pulling plate and is bolted to the pulling plate. The inner support sleeve is arranged between the flange and the pulling plate and is bolted to the flange.

[0014] Preferably, the pull plate is further provided with a spring slot, in which a spring is arranged. One end of the spring is fixedly connected to the pull plate, and the other end is connected to a steel ball for providing buffering.

[0015] Preferably, a connecting block is further provided on the pulling plate, one end of the supporting rod is bolted to the connecting block, and the other end is fixed to the upper clamping block.

[0016] Preferably, a partition is further provided in the middle of the clamp body, which is bolted to the clamp body. The clamp body also includes a first counterweight block, which is bolted to the bottom of the clamp body.

[0017] Preferably, a second counterweight is further bolted to the bottom of the flange.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model sets the adjusting bolt in the upper clamping block to further enhance the clamping stability of the clamp. The clamping block can be adjusted by twisting the adjusting bolt, so that it can move up and down. This facilitates the adjustment operation of the clamp while the clamping block firmly clamps the workpiece to be processed.

[0020] 2. The utility model disperses the turning force transmitted by the workpiece through the connecting sleeve, flange, outer support sleeve, pulling plate and other structures on the connecting mechanism, fills the internal gap through the inner support sleeve and retaining ring, and adopts counterweight blocks to cooperate with the counterweight to enhance stability, prevent the product from displacement or even detachment from the fixture, and facilitate disassembly and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the cooperation between the utility model and the workpiece to be processed;

[0022] Figure 2 It is a structural diagram of the utility model;

[0023] Figure 3 for Figure 2 A magnified schematic diagram of the structure at A in the middle;

[0024] Figure 4 Schematic diagram of the coordination between the adjusting bolt and the pressing block;

[0025] In the picture:

[0026] 1- fixture body, 101- partition, 102- first counterweight;

[0027] 2-clamping mechanism, 201-upper clamping block, 202-lower clamping block, 203-pressing block, 204-adjusting bolt, 205-stepped hole; 206-lower adjustment plate, 207-positioning block,

[0028] 3-connecting mechanism, 301-pull rod joint, 302-connecting sleeve, 303-flange, 304-inner support sleeve, 305-outer support sleeve, 306-pull plate, 307-support rod, 308-retaining ring, 309-spring, 310-steel ball, 311-connecting block, 312-second counterweight;

[0029] 4-Workpiece to be processed. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions of the schematic diagrams 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 shall fall within the scope of protection of the present invention.

[0031] like Figure 1-4 As shown, a CNC lathe fixture is used in conjunction with a lathe pull rod and a workpiece 4 to be processed, comprising: a fixture body 1, a clamping mechanism 2, and a connecting mechanism 3;

[0032] The clamp body 1 is a cylindrical structure, with an opening extending through the middle of the clamp body 1 along its central axis. The clamping mechanism 2 and the connecting mechanism 3 are connected to both ends of the clamp body 1 respectively.

[0033] The clamping mechanism 2 includes an upper clamping block 201, a lower clamping block 202, a pressure block 203 and an adjusting bolt 204. The upper clamping block 201 and the lower clamping block 202 are respectively arranged on the upper and lower sides of the clamp body 1. The screw head of the adjusting bolt 204 is arranged on the upper clamping block 201, and its screw portion passes through the upper clamping block 201. The pressure block 203 is correspondingly located below the screw portion of the adjusting bolt 204 and is penetrated from top to bottom by a stepped hole 205. The aperture of the upper end portion of the stepped hole 205 is larger than the aperture of the lower end portion thereof, and the upper end portion thereof is provided with an internal thread and is threadedly connected to the screw portion of the adjusting bolt 204.

[0034] The connecting mechanism 3 is used to connect the lathe pull rod;

[0035] In some embodiments, the upper end surface of the upper clamping block 201 is provided with a bolt groove, and the adjusting bolt 204 is a hexagon socket head bolt. The adjusting bolt 204 is limitedly set in the bolt groove and has the freedom to rotate around its axis.

[0036] In some embodiments, the clamping mechanism 2 further includes a lower adjustment plate 206 and a positioning block 207. The lower adjustment plate 206 is arranged on the inner wall of the clamp body 1. The bottom surface of the lower clamping block 202 is in contact with the top surface of the lower adjustment plate 206. Both are bolted to the clamp body 1. A first protrusion is provided on the top surface of the lower clamping block 202. The positioning block 207 is arranged on the first protrusion for positioning the workpiece 4 to be processed. The adjusting bolt 204 is arranged in the upper clamping block 201 to further enhance the clamping stability of the clamp, and the pressure block 203 is adjusted by twisting the adjusting bolt 204 so that it can move up and down, thereby facilitating the adjustment operation of the clamp under the premise that the pressure block 203 firmly clamps the workpiece 4 to be processed.

[0037] In some embodiments, the connecting mechanism 3 includes a tie rod joint 301, a connecting sleeve 302, a flange 303, an inner support sleeve 304, an outer support sleeve 305, a pull plate 306, a support rod 307 and a retaining ring 308. The tie rod joint 301 is a hollow cylindrical structure. Internal threads are uniformly distributed on the inner side wall of the tie rod joint 301. One end of the tie rod joint 301 is threadedly connected to the connecting sleeve 302, and the other end can be threadedly connected to the lathe tie rod. One end face of the flange 303 is fixedly connected to the fixture body 1 On the end surface, the other end surface is fixedly connected to the outer support sleeve 305, the pull plate 306 is limitedly set in the inner cavity of the clamp body 1, one end of which extends outward and is provided with a groove radially outward. The middle part of the connecting sleeve 302 is configured to protrude radially outward and is correspondingly set in the groove. The retaining ring 308 is set between the connecting sleeve 302 and the pull plate 306 and is bolted to the pull plate 306. The inner support sleeve 304 is set between the flange 303 and the pull plate 306 and is bolted to the flange 303;

[0038] In some embodiments, a spring 309 groove is further provided on the pull plate 306, in which a spring 309 is provided. One end of the spring 309 is fixedly connected to the pull plate 306, and the other end is connected to a steel ball 310 for providing a buffer.

[0039] In some embodiments, a connecting block 311 is further provided on the pull plate 306 , one end of the support rod 307 is bolted to the connecting block 311 , and the other end is fixed to the upper clamping block 201 ;

[0040] In some embodiments, a partition plate 101 is further provided in the middle of the clamp body 1, which is bolted to the clamp body 1. The clamp body 1 also includes a first counterweight block 102, which is bolted to the bottom of the clamp body 1.

[0041] In some embodiments, a second counterweight 312 is also bolted to the bottom of the flange 303; the turning force transmitted by the workpiece is dispersed through the connecting sleeve 302, flange 303, outer support sleeve 305, pulling plate 306 and other structures on the connecting mechanism 3, and the internal gap is filled through the inner support sleeve 304 and the retaining ring 308, and the counterweight is used to cooperate with the counterweight to enhance stability, prevent the product from displacement or even detachment from the fixture, and facilitate disassembly and adjustment.

Claims

1. A CNC lathe fixture, used in conjunction with a lathe pull rod and a workpiece to be machined, characterized in that: include: A clamp body, a clamping mechanism, and a connecting mechanism; The clamp body is a cylindrical structure, the middle part of the clamp body is provided with an opening along its central axis, and the clamping mechanism and the connecting mechanism are respectively connected to both ends of the clamp body; The clamping mechanism includes an upper clamping block, a lower clamping block, a pressure block and an adjusting bolt, wherein the upper clamping block and the lower clamping block are respectively arranged on the upper and lower sides of the clamp body, the screw head of the adjusting bolt is arranged on the upper clamping block, and the screw portion thereof passes through the upper clamping block, and the pressure block is correspondingly located below the screw portion of the adjusting bolt, and is penetrated by a stepped hole from top to bottom, the aperture of the upper end portion of the stepped hole is larger than the aperture of the lower end portion thereof, and the upper end portion thereof is provided with an internal thread and is threadedly connected to the screw portion of the adjusting bolt; The connecting mechanism is used to connect the lathe pull rod.

2. The CNC lathe fixture according to claim 1, characterized in that: The upper end surface of the upper clamping block is provided with a bolt groove, and the adjusting bolt is a hexagonal cylindrical head bolt. The adjusting bolt is limitedly set in the bolt groove and has the freedom to rotate around its axis.

3. The CNC lathe fixture according to claim 2, characterized in that: The clamping mechanism also includes a lower adjustment plate and a positioning block. The lower adjustment plate is arranged on the inner wall of the clamp body. The bottom surface of the lower clamping block is in contact with the top surface of the lower adjustment plate. Both are bolted to the clamp body. A first protrusion is provided on the top surface of the lower clamping block. The positioning block is arranged on the first protrusion for positioning the workpiece to be processed.

4. The CNC lathe fixture according to claim 3, characterized in that: The connecting mechanism includes a pull rod joint, a connecting sleeve, a flange, an inner support sleeve, an outer support sleeve, a pull plate, a support rod and a retaining ring. The pull rod joint is a hollow cylindrical structure, and the inner side wall of the pull rod joint is evenly provided with internal threads. One end of the pull rod joint is threadedly connected to the connecting sleeve, and the other end can be threadedly connected to the lathe pull rod. One end face of the flange is fixedly connected to the end face of the fixture body, and the other end face is fixedly connected to the outer support sleeve. The pull plate limiter is arranged in the inner cavity of the fixture body, one end of which extends outward and is provided with a groove radially outward. The middle part of the connecting sleeve is protruding radially outward and is correspondingly arranged in the groove. The retaining ring is arranged between the connecting sleeve and the pulling plate and is connected with the pulling plate bolts. The inner support sleeve is arranged between the flange and the pulling plate and is connected with the flange bolts.

5. The CNC lathe fixture according to claim 4, characterized in that: The pull plate is further provided with a spring slot in which a spring is arranged. One end of the spring is fixedly connected to the pull plate, and the other end is connected to a steel ball for providing buffering.

6. The CNC lathe fixture according to claim 5, characterized in that: The pull plate is further provided with a connecting block, one end of the support rod is bolted to the connecting block, and the other end is fixed to the upper clamping block.

7. The CNC lathe fixture according to claim 6, characterized in that: A partition is also provided in the middle of the clamp body, which is bolted to the clamp body. The clamp body also includes a first counterweight block, which is bolted to the bottom of the clamp body.

8. The CNC lathe fixture according to claim 7, characterized in that: The bottom of the flange is also bolted with a second counterweight.

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