Positioning mechanism for workpiece machining of numerical control machine tool

Abstract

The utility model relates to the technical field of machining positioning, and discloses a positioning mechanism for workpiece machining of a numerical control machine tool, which comprises a numerical control machine tool body, a clamp arranged at the top of the numerical control machine tool body, and a positioning adjusting mechanism arranged at the bottom of the clamp. When the angle needs to be locked, the user can rotate the adjusting sleeve, the adjusting sleeve is in threaded connection with the threaded base, and the lantern ring rises along with rotation of the adjusting sleeve, so that the angle needs to be locked. When the clamp is used, a plurality of locking rods on the clamp are inserted into the corresponding locking holes respectively, so that the angle of the adjusting plate is stabilized, accurate positioning and stability of the clamp are ensured, the flexibility and adaptability of the clamp are improved, high-precision positioning can be kept under various machining conditions, and the machining efficiency and the workpiece quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining positioning, in particular to a positioning mechanism for machining workpieces of a numerically controlled machine tool. Background Art

[0002] The positioning mechanism used in CNC machine tool workpiece processing is a device that ensures the accurate and stable position of the workpiece during the processing. It usually includes positioning surfaces, positioning pins or holes, and guide devices. It is used to provide reference surfaces and achieve accurate positioning of the workpiece to improve processing accuracy and efficiency. The positioning mechanism can be adjusted and set according to different processing requirements to meet the processing requirements of various complex parts. In the CNC machine tool processing process, the role of the positioning mechanism is crucial, which directly affects the processing quality and efficiency of the workpiece.

[0003] According to the Chinese patent authorization announcement: CN213497784U, a workpiece auxiliary positioning and clamping mechanism for CNC machine tool processing is disclosed, including a base plate, and a first support rod and a second support rod are fixedly connected to the two sides of the top of the base plate respectively, the top of the first support rod is rotatably connected to a first support block, the middle part of the first support block is threadedly connected to a first threaded rod, and one end of the first threaded rod is rotatably connected to a first clamping block. When the utility model is in use, after the top end of the workpiece is processed by the CNC machine tool, the insertion rod is pulled out, so that the first support block and the second support block lose support, thereby turning the first support block and the second support block over, and then reinserting the insertion rod to re-support the bottom ends of the first support block and the second support block to complete the turning of the workpiece. Compared with the existing clamps, the utility model can complete the turning of the workpiece when the workpiece is processed and the workpiece is removed. It is simple and convenient to use and greatly improves the production efficiency. However, there are still some problems with the positioning mechanism. Although the positioning mechanism can turn the workpiece over through the clamp, it cannot adjust its angle. When the workpiece needs to be positioned at a specific angle to meet the processing requirements, the inability to adjust the angle will lead to a decrease in processing accuracy, which will affect the assembly quality and performance of the parts. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a positioning mechanism for workpiece processing of CNC machine tools, which solves the problem that although some positioning mechanisms can flip the workpiece through a clamp, they cannot adjust its angle. When the workpiece needs to be positioned at a specific angle to meet the processing requirements, the inability to adjust the angle will lead to a decrease in processing accuracy.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a positioning mechanism for CNC machine tool workpiece processing, including a CNC machine tool body, a clamp is provided on the top of the CNC machine tool body, a positioning adjustment mechanism is provided at the bottom of the clamp, the positioning adjustment mechanism includes a bottom plate, a connecting plate, an adjustment plate, a stable base, a positioning plate, a scale bar, a locking hole, a locking rod, a collar, an adjustment sleeve, an electric lifting rod and a threaded base, the top of the bottom plate is fixedly connected to three electric lifting rods, the free ends of the three electric lifting rods are fixedly connected to the threaded base, The outer wall of the threaded base is threadedly connected with an adjusting sleeve, the top of the adjusting sleeve is rotatably connected with a collar, the top of the collar is fixedly connected with a plurality of locking rods, the top of the threaded base is rotatably connected with an adjusting plate, the top of each of the adjusting plates is provided with a plurality of locking holes, a scale bar is provided on one side of each of the plurality of locking holes, a positioning plate is provided on the other side of one of the scale bars, one end of the positioning plate is fixedly connected with a stable base, the top of the stable base is fixedly connected with a clamp, the outer wall of the collar is fixedly connected with an indicating rod, and a workpiece is placed inside the clamp;

[0006] A protective mechanism is provided on the top of the clamp, and the protective mechanism includes a compression spring, a clamping plate, a silicone pad and a limiting slide. Two clamps are provided on the top of the clamp, and the inner sides of the two clamping plates are fixedly connected with multiple compression springs, the outer sides of the two clamping plates are fixedly connected with silicone pads, and the bottom ends of the two clamping plates are fixedly connected with limiting slides.

[0007] Preferably, the bottom end of the base plate is slidably connected to the top end of the CNC machine tool body, and both side walls of the base plate are fixedly connected with connecting plates, and one end of the two connecting plates is respectively slidably connected to the two side walls of the CNC machine tool body.

[0008] Preferably, the inner side of the collar is slidably connected to the outer side of the threaded base.

[0009] Preferably, the bottom ends of the plurality of scale bars are fixedly connected to the top end of the adjustment plate.

[0010] Preferably, the locking hole matches the size of the locking rod.

[0011] Preferably, one end of each of the compression springs is fixedly connected to the inner sides of the two clamps.

[0012] Preferably, outer sides of the two silicone pads are in contact with two side walls of the workpiece.

[0013] Preferably, the bottom ends of the two limiting slide plates are slidably connected to the top end of the clamp.

[0014] Beneficial Effects

[0015] The utility model provides a positioning mechanism for CNC machine tool workpiece processing. Compared with the prior art, it has the following beneficial effects:

[0016] 1. In the utility model, through the positioning adjustment mechanism, when the angle of the positioning fixture needs to be positioned, the angle to be adjusted can be selected by referring to the scale bar, and the user can rotate the adjustment plate, which can drive the fixture to rotate. When the angle needs to be locked, the user can rotate the adjustment sleeve, which is threadedly connected to the threaded base. As the adjustment sleeve rotates, the collar will rise accordingly, and the multiple locking rods thereon will be inserted into the corresponding locking holes respectively, thereby stabilizing the angle of the adjustment plate, ensuring the precise positioning and stability of the fixture, improving the flexibility and adaptability of the fixture, ensuring high-precision positioning under various processing conditions, and improving processing efficiency and workpiece quality.

[0017] 2. In the utility model, by setting up a protective mechanism, when the two clamps of the fixture approach each other, the two clamping plates fit the two sides of the workpiece, and as the two clamps continue to approach each other, the two clamps respectively push multiple compression springs to make the clamping plates gradually clamp the workpiece, and the silicone pads on the outside of the clamping plates can not only increase the friction force, but also prevent burrs on the workpiece from damaging the clamps, and can prevent the two clamps from directly clamping the workpiece and damaging the workpiece by hard contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a positioning mechanism for CNC machine tool workpiece processing proposed by the utility model;

[0019] Figure 2 This is a structural schematic diagram of the adjusting plate portion of a positioning mechanism for workpiece processing of a CNC machine tool proposed by the utility model;

[0020] Figure 3 The utility model provides a positioning mechanism for machining workpieces of a CNC machine tool. Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a structural exploded view of a threaded base portion of a positioning mechanism for machining workpieces of a CNC machine tool proposed by the utility model;

[0022] Figure 5 The utility model is a structural schematic diagram of a fixture part of a positioning mechanism for machining workpieces of a CNC machine tool.

[0023] Legend:

[0024] 1. CNC machine tool body; 2. Fixture; 201. Clamp; 3. Positioning and adjusting mechanism; 301. Bottom plate; 302. Connecting plate; 303. Adjusting plate; 304. Stable base; 305. Positioning plate; 306. Scale bar; 307. Locking hole; 308. Locking rod; 309. Ring; 310. Adjusting sleeve; 311. Electric lifting rod; 312. Threaded base; 313. Indicator rod; 4. Workpiece; 5. Protective mechanism; 501. Compression spring; 502. Clamping plate; 503. Silicone pad; 504. Limiting slide plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1 - Figure 5 The utility model provides two technical solutions, which specifically include the following embodiments:

[0027] Embodiment 1:

[0028] A positioning mechanism for machining workpieces of a numerically controlled machine tool, comprising a numerically controlled machine tool body 1, characterized in that: a fixture 2 is provided on the top of the numerically controlled machine tool body 1, a positioning and adjusting mechanism 3 is provided on the bottom of the fixture 2, the positioning and adjusting mechanism 3 comprises a bottom plate 301, a connecting plate 302, an adjusting plate 303, a stable base 304, a positioning plate 305, a scale bar 306, a locking hole 307, a locking rod 308, a collar 309, an adjusting sleeve 310, an electric lifting rod 311 and a threaded base 312, three electric lifting rods 311 are fixedly connected to the top of the bottom plate 301, and the three electric lifting rods 311 are fixedly connected to the top of the bottom plate 301. The free end is fixedly connected with a threaded base 312, the outer wall of the threaded base 312 is threadedly connected with an adjusting sleeve 310, the top of the adjusting sleeve 310 is rotatably connected with a collar 309, the top of the collar 309 is fixedly connected with a plurality of locking rods 308, the top of the threaded base 312 is rotatably connected with an adjusting plate 303, the top of the adjusting plate 303 is provided with a plurality of locking holes 307, one side of the plurality of locking holes 307 is provided with a scale bar 306, the other side of one of the scale bars 306 is provided with a positioning plate 305, one end of the positioning plate 305 is fixedly connected with a stable base 304, the stable base The top of the 304 is fixedly connected with the fixture 2, and the outer wall of the collar 309 is fixedly connected with the indicator rod 313. The indicator rod 313 cooperates with the scale bar 306 and the positioning plate 305 to adjust the rotation angle of the adjustment plate 303. When the adjustment plate 303 is rotated, the position of the indicator rod 313 remains unchanged, while the positions of the positioning plate 305 and the scale bar 306 change. The user can judge the current rotation angle of the fixture 2 according to the degree indicated by one end of the indicator rod 313. The workpiece 4 is placed inside the fixture 2. The bottom end of the bottom plate 301 is slidably connected to the top of the CNC machine tool body 1, and the two side walls of the bottom plate 301 They are all fixedly connected with connecting plates 302, one end of the two connecting plates 302 is respectively slidably connected to the two side walls of the CNC machine tool body 1, the inner side of the ring 309 is slidably connected to the outer side of the threaded base 312, the bottom ends of the multiple scale bars 306 are all fixedly connected to the top of the adjustment plate 303, the size of the locking hole 307 matches the size of the locking rod 308. It should be noted that the working principle of the clamp 2 is to make the two clamps 201 approach each other through a screw rod, and as the two clamps 201 continue to approach each other, the two clamps 201 can clamp the workpiece 4, and the working process of the above-mentioned related clamp 2 refers to the prior art.

[0029] During operation, when the user needs to locate the height of the clamp 2, the user starts multiple electric lifting rods 311, and the free ends of the multiple electric lifting rods 311 can push the threaded base 312 to a suitable height. When the angle of the clamp 2 needs to be located, the angle to be adjusted can be selected by referring to the scale bar 306. The user can rotate the adjustment plate 303, and the adjustment plate 303 can drive the clamp 2 to rotate. When the angle needs to be locked, the user can rotate the adjustment sleeve 310, and the adjustment sleeve 310 is threadedly connected to the threaded base 312. As the adjustment sleeve 310 rotates, the ring 309 will rise accordingly, and the multiple locking rods 308 thereon will be inserted into the corresponding locking holes 307 respectively, thereby stabilizing the angle of the adjustment plate 303, ensuring the precise positioning and stability of the clamp 2, improving the flexibility and adaptability of the clamp 2, ensuring high-precision positioning under various processing conditions, and improving processing efficiency and workpiece 4 quality.

[0030] Embodiment 2:

[0031] On the basis of Example 1, a protective mechanism 5 is provided on the top of the clamp 2, and the protective mechanism 5 includes a compression spring 501, a clamping plate 502, a silicone pad 503 and a limiting slide plate 504. Two clamps 201 are provided at the top of the clamp 2, and the inner sides of the two clamping plates 502 are fixedly connected with multiple compression springs 501, and the outer sides of the two clamping plates 502 are fixedly connected with silicone pads 503. The bottom ends of the two clamping plates 502 are fixedly connected with the limiting slide plate 504, and the limiting slide plate 504 can increase the stability of the movement of the clamping plates 502. One ends of the multiple compression springs 501 are respectively fixedly connected to the inner sides of the two clamps 201, and the outer sides of the two silicone pads 503 are both in contact with the two side walls of the workpiece 4. The silicone pad 503 is made of soft material. The silicone pad 503 cooperates with the compression spring 501 to avoid hard contact between the workpiece 4 and the clamp 201, and the bottom ends of the two limiting slide plates 504 are slidably connected to the top of the clamp 2.

[0032] When the two clamps 201 of the fixture 2 approach each other, the two clamping plates 502 fit the two sides of the workpiece 4. As the two clamps 201 continue to approach each other, the two clamps 201 respectively push the multiple compression springs 501 to make the clamping plates 502 gradually clamp the workpiece 4. The silicone pads 503 on the outside of the clamping plates 502 can not only increase the friction, but also prevent burrs on the workpiece 4 from damaging the clamps 201, and can prevent the two clamps 201 from directly clamping the workpiece 4 and causing hard contact to damage the workpiece 4.

[0033] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the protection scope of the present application.

Claims

1. A positioning mechanism for workpiece processing of a CNC machine tool, comprising a CNC machine tool body (1), characterized in that: The top of the CNC machine tool body (1) is provided with a fixture (2), and the bottom of the fixture (2) is provided with a positioning and adjusting mechanism (3), and the positioning and adjusting mechanism (3) comprises a bottom plate (301), a connecting plate (302), an adjusting plate (303), a stable base (304), a positioning plate (305), a scale bar (306), a locking hole (307), a locking rod (308), a collar (309), an adjusting sleeve (310), an electric lifting rod (311) and a threaded base (312), wherein the top of the bottom plate (301) is fixedly connected to three electric lifting rods (311), the free ends of the three electric lifting rods (311) are fixedly connected to the threaded base (312), the outer wall of the threaded base (312) is threadedly connected to the adjusting sleeve (310), and the The top of the adjusting sleeve (310) is rotatably connected to a collar (309), the top of the collar (309) is fixedly connected to a plurality of locking rods (308), the top of the threaded base (312) is rotatably connected to an adjusting plate (303), the top of each adjusting plate (303) is provided with a plurality of locking holes (307), one side of each of the plurality of locking holes (307) is provided with a scale bar (306), the other side of one of the scale bars (306) is provided with a positioning plate (305), one end of the positioning plate (305) is fixedly connected to a stable base (304), the top of the stable base (304) is fixedly connected to a fixture (2), the outer wall of the collar (309) is fixedly connected to an indicating rod (313), and a workpiece (4) is placed inside the fixture (2); A protective mechanism (5) is provided at the top of the clamp (2), and the protective mechanism (5) comprises a compression spring (501), a clamping plate (502), a silicone pad (503) and a limiting slide plate (504). Two clamps (201) are provided at the top of the clamp (2), and the inner sides of the two clamping plates (502) are fixedly connected to a plurality of compression springs (501), the outer sides of the two clamping plates (502) are fixedly connected to the silicone pad (503), and the bottom ends of the two clamping plates (502) are fixedly connected to the limiting slide plate (504).

2. A positioning mechanism for workpiece processing of a CNC machine tool according to claim 1, characterized in that: The bottom end of the bottom plate (301) is slidably connected to the top end of the CNC machine tool body (1), and both side walls of the bottom plate (301) are fixedly connected to connecting plates (302), and one end of the two connecting plates (302) is respectively slidably connected to the two side walls of the CNC machine tool body (1).

3. A positioning mechanism for workpiece processing of a CNC machine tool according to claim 1, characterized in that: The inner side of the collar (309) is slidably connected to the outer side of the threaded base (312).

4. A positioning mechanism for workpiece processing of a CNC machine tool according to claim 1, characterized in that: The bottom ends of the plurality of scale bars (306) are all fixedly connected to the top end of the adjustment plate (303).

5. A positioning mechanism for workpiece processing of a CNC machine tool according to claim 1, characterized in that: The locking hole (307) matches the size of the locking rod (308).

6. A positioning mechanism for workpiece processing of a CNC machine tool according to claim 1, characterized in that: One end of each of the plurality of compression springs (501) is fixedly connected to the inner sides of the two clamps (201).

7. A positioning mechanism for workpiece processing of a CNC machine tool according to claim 1, characterized in that: The outer sides of the two silicone pads (503) are both in contact with the two side walls of the workpiece (4).

8. The positioning mechanism for workpiece processing of a CNC machine tool according to claim 1, characterized in that: The bottom ends of the two limiting slide plates (504) are both slidably connected to the top end of the clamp (2).

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