Machining limiting clamp structure

Abstract

The utility model discloses a machining limiting clamp structure which comprises a mounting plate, a through hole is formed in the surface of the mounting plate, an adjusting assembly is arranged in the through hole, the adjusting assembly comprises attaching pieces, the attaching pieces are arranged in the through hole at equal angles, the outer surfaces of the attaching pieces are attached to the inner wall of the through hole, and the outer surfaces of the attaching pieces are attached to the inner wall of the through hole. The circle centers of the multiple attaching pieces are concentrated on the same point, and attaching and abutting against the outer surface of the milling cutter are achieved through the attaching pieces; the adjusting piece is arranged between the attaching piece and the through hole, and the top of the adjusting piece is in a retractable shape; through the design, the milling cutter can be simply and quickly limited and clamped, the operation speed is greatly increased, and compared with abutting limiting of an existing ejector pin, the contact area between the milling cutter limiting device and the milling cutter is effectively increased, the stability of limiting clamping is guaranteed, and the service life of the milling cutter is prolonged. Meanwhile, corresponding adjustment can be carried out according to milling cutters with different diameters, the whole milling cutter adjusting device has high flexibility, and the defects in the prior art are overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of PCB milling cutter processing, and specifically relates to a processing limiting clamp structure. Background Art

[0002] A milling cutter is a rotating tool with one or more teeth used for milling processing. When working, each tooth cuts off the excess of the workpiece intermittently in turn. It is also widely used in the processing of PCB boards. During the manufacturing of the PCB milling cutter itself, it needs to be fixed by a limit clamp before it can be used for subsequent production and processing.

[0003] At present, the production method of milling cutters is to fix one end of the milling cutter in the three-jaw chuck of the machine tool, and the other end is tightened by the tailstock with a thimble on the CNC machine tool to ensure the rotation and stable support of the milling cutter. However, the contact area between the thimble and the milling cutter is small, and the overall stability is poor. In a support fixture for a tungsten steel milling cutter disclosed in announcement number CN219005692U, although it can prevent the milling cutter from deviating to a certain extent, since the main function of this structure is support, there are still major deficiencies in the limit function, so there is room for improvement. Utility Model Content

[0004] The utility model aims to provide a machining limiting fixture structure to solve the problem of poor stability of the current structure for limiting the milling cutter mentioned in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a processing limit fixture structure, comprising a mounting plate, a through hole is opened on the surface of the mounting plate, and an adjustment component is arranged inside the through hole, and the adjustment component comprises:

[0006] A fitting piece is arranged at an equal angle inside the through hole, the outer surface of the fitting piece fits with the inner wall of the through hole, the centers of the multiple fitting pieces are concentrated on the same point, and the fitting piece is used to achieve the fit and abutment with the outer surface of the milling cutter;

[0007] The adjusting member is arranged between the fitting member and the through hole, and the top of the adjusting member is retractable and passes through the outside of the mounting plate. The position of the fitting member is adjusted by the adjusting member so that the fitting member can complete the fitting and limiting of milling cutters of different diameters.

[0008] Preferably, the fitting member is a fitting plate, an arc groove is provided through the inside of the fitting plate, which is not shown in the figure, and the adjusting member movably penetrates the arc groove.

[0009] Preferably, the adjusting member includes a flexible connecting piece. The top end of the flexible connecting piece is in a disconnected state, and a connecting stud is fixed on the end face of the disconnected state. The connecting stud penetrates to the outside of the top of the mounting plate, and an adjusting nut is sleeved outside the connecting stud.

[0010] Preferably, a spring is further installed inside the connecting stud for pushing the connecting stud outward to achieve close fitting between the connecting stud and the adjusting nut, ensuring that the threaded connection between the two is not affected. The length of the connecting stud is greater than the distance between the through hole and the top end face of the mounting plate.

[0011] Preferably, an integral base is fixed at the bottom end of the mounting plate. A sliding groove for sliding on the guide rail of the numerical control machine is formed on the bottom end face of the base. A lubrication component is further installed on the base. The lubrication component includes:

[0012] An oil storage cylinder is connected through the base and extends to the inside of the sliding groove at the bottom end. Both the top end and the bottom end of the oil storage cylinder are open, and an oil inlet and an oil outlet are respectively formed;

[0013] A pressing cap is detachably adhered to the top end face of the oil storage cylinder. The inside of the pressing cap is in a raised shape. By pressing the pressing cap, the lubricating oil inside the oil storage cylinder can be discharged into the sliding groove, achieving the purpose of lubrication when the base slides on the guide rail of the numerical control machine through the sliding groove.

[0014] Preferably, a plurality of sector-shaped baffles are arranged inside the oil outlet of the oil storage cylinder. The endpoints of the plurality of baffles converge at one point, and each two adjacent baffles are in sealed contact with each other.

[0015] Preferably, an annular protrusion is fixed on the outer surface of the oil storage cylinder. The bottom end face of the annular protrusion is lapped on the top end face of the base, thereby limiting the installation position of the oil storage cylinder and the base, and preventing the entire lubrication component from moving toward the inside of the sliding groove when pressing the pressing cap.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] Through the design of the present utility model, the limit clamping of the milling cutter can be simply and quickly realized, greatly improving the operation speed. And compared with the prior art of the existing ejector pin for tight limit, the contact area between the present utility model and the milling cutter is effectively increased, ensuring the stability of the limit clamping. At the same time, the present utility model can make corresponding adjustments according to milling cutters with different diameters, and the overall has high flexibility, improving the deficiencies existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the present utility model;

[0019] Figure 2Schematic diagram of the adjustment component of the present utility model;

[0020] Figure 3 Cross-sectional view of the lubrication component of the present utility model.

[0021] In the figure:

[0022] 100. Mounting plate; 100a. Through hole; 101. Base; 101a. Slide groove; 102. Fitting plate; 103. Flexible connecting piece; 104. Connecting stud; 105. Adjusting nut; 106. Spring;

[0023] 200. Oil storage cylinder; 200a. Annular protrusion; 201. Pressing cap; 202. Flap. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1 to 3 , the present utility model provides a technical solution: a processing limit fixture structure, including a mounting plate 100, a through hole 100a is provided on the surface of the mounting plate 100, and an adjustment component is arranged inside the through hole 100a. The adjustment component includes:

[0026] Fitting parts, which are arranged inside the through hole 100a at equal angles. The outer surface of the fitting parts is in contact with the inner wall of the through hole 100a, and the centers of the multiple fitting parts are concentrated at the same point. The outer surface of the milling cutter is brought into contact and resisted through the fitting parts;

[0027] Adjusting parts, which are arranged between the fitting parts and the through hole 100a, and the top of the adjusting parts is in a retractable state and penetrates to the outside of the mounting plate 100. The position of the fitting parts is adjusted through the adjusting parts, so that the fitting parts can complete the fitting limit of milling cutters with different diameters.

[0028] In this embodiment, preferably, the fitting part is a fitting plate 102. An arc groove is provided through the inside of the fitting plate 102, which is not shown in the figure. The adjusting part passes through the arc groove movably. Therefore, when the adjusting part is pulled, the fitting plate 102 can be driven to converge towards the center position of the through hole 100a, so as to realize the clamping limit of the milling cutter, and the separation between the fitting plate 102 and the adjusting part is also avoided.

[0029] In this embodiment, preferably, the adjusting member includes a flexible connecting piece 103. The top end of the flexible connecting piece 103 is in a disconnected state, and a connecting stud 104 is fixed on the end face of the disconnected state. The connecting stud 104 penetrates to the outside of the top of the mounting plate 100. An adjusting nut 105 is also sleeved outside the connecting stud 104. When it is necessary to adjust the fitting plate 102, the adjusting nut 105 is rotated. Restricted by the top end face of the mounting plate 100, the adjusting nut 105 can only perform a circular rotation motion and synchronously drive the connecting stud 104 to rise. During the rising of the connecting stud 104, the flexible connecting piece 103 will be driven upward together. At this time, the length of the flexible connecting piece 103 is shortened, so as to realize the movement of the fitting plate 102 towards the middle of the through hole 100a.

[0030] In this embodiment, preferably, a spring 106 is further installed inside the connecting stud 104 to push the connecting stud 104 towards the outside, so as to realize the tight fit of the connecting stud 104 and the adjusting nut 105 and ensure that the thread connection between the two is not affected. The length of the connecting stud 104 is greater than the distance between the through hole 100a and the top end face of the mounting plate 100.

[0031] In this embodiment, preferably, an integral base 101 is fixed to the bottom end of the mounting plate 100. A sliding groove 101a for sliding on the guide rail of the numerical control machine tool is provided on the bottom end face of the base 101. The whole device of the present invention is arranged between the tailstock and the three-jaw chuck, and the axis of the through hole 100a and the axis of the three-jaw chuck are on the same horizontal line, so as to ensure that the milling cutter can horizontally penetrate the through hole 100a, and the axis of the milling cutter itself coincides with the center point of the through hole 100a. A lubrication component is also installed on the base 101. The lubrication component includes:

[0032] An oil storage cylinder 200, which is connected to the base 101 through penetration, and the bottom end extends into the sliding groove 101a. The top end and the bottom end of the oil storage cylinder 200 are both open, and an oil inlet and an oil outlet are respectively formed;

[0033] A pressing cap 201, which is detachably bonded to the top end face of the oil storage cylinder 200. The inside of the pressing cap 201 is in a raised shape. By pressing the pressing cap 201, the lubricating oil inside the oil storage cylinder 200 can be discharged into the sliding groove 101a, and the purpose of lubrication is realized when the base 101 slides on the guide rail of the numerical control machine tool through the sliding groove 101a.

[0034] In this embodiment, preferably, a plurality of baffles 202 with a sector-shaped cross-section are arranged inside the oil outlet of the oil storage cylinder 200. The endpoints of the plurality of baffles 202 converge at one point, and each two adjacent baffles 202 are in sealed contact with each other. Therefore, under normal circumstances, the baffles 202 can be closed to achieve the purpose of blocking the lubricating oil inside the oil storage cylinder 200. When the pressing cap 201 is pressed, the gas inside the pressing cap 201 will flow into the oil storage cylinder 200 and squeeze the lubricating oil in the oil storage cylinder 200 towards the baffles 202, forcing the baffles 202 to open and discharging the lubricating oil.

[0035] In this embodiment, preferably, an annular protrusion 200a is fixed on the outer surface of the oil storage cylinder 200. The bottom end surface of the annular protrusion 200a abuts on the top end surface of the base 101, thereby limiting the installation position of the oil storage cylinder 200 and the base 101, and preventing the entire lubricating assembly from moving towards the inside of the chute 101a when the pressing cap 201 is pressed.

[0036] Although the embodiments of the present invention have been shown and described (see the above detailed description), those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machining limit clamp structure, comprising a mounting plate (100), wherein a through hole (100a) is provided on a surface of the mounting plate (100), characterized in that: An adjustment component is arranged inside the through hole (100a), and the adjustment component comprises: A bonding piece is arranged at an equal angle inside the through hole (100a), the outer surface of the bonding piece is bonded to the inner wall of the through hole (100a), and the centers of the multiple bonding pieces are concentrated on the same point; The adjusting member is arranged between the fitting member and the through hole (100a), and the top of the adjusting member is retractable and penetrates to the outside of the mounting plate (100).

2. A processing limiting fixture structure according to claim 1, characterized in that: The fitting piece is a fitting plate (102), an arc groove is provided through the inside of the fitting plate (102), and the adjusting piece is movably connected with the arc groove.

3. A processing limiting fixture structure according to claim 2, characterized in that: The adjusting member comprises a flexible connecting piece (103), the top end of which is in a disconnected shape, and a connecting stud (104) is fixed on the disconnected end surface, the connecting stud (104) penetrates to the outside of the top of the mounting plate (100), and an adjusting nut (105) is sleeved on the outside of the connecting stud (104).

4. A processing limiting fixture structure according to claim 3, characterized in that: A spring (106) is also installed on the inner side of the connecting stud (104), and the length of the connecting stud (104) is greater than the distance between the through hole (100a) and the top end surface of the mounting plate (100).

5. The processing limiting fixture structure according to claim 1 is characterized in that: An integrated base (101) is fixed to the bottom end of the mounting plate (100), a slide groove (101a) is provided on the bottom end surface of the base (101), and a lubrication component is also installed on the base (101), the lubrication component comprising: The oil storage cylinder (200) is connected to the base (101) through the bottom end thereof extending into the slide groove (101a). The top and bottom ends of the oil storage cylinder (200) are both open and respectively formed with an oil inlet and an oil outlet; The pressing cap (201) is detachably bonded to the top end surface of the oil storage cylinder (200), and the interior of the pressing cap (201) is in a bulge shape.

6. A processing limiting fixture structure according to claim 5, characterized in that: A plurality of baffles (202) with fan-shaped cross sections are arranged inside the oil outlet of the oil storage cylinder (200), the end points of the plurality of baffles (202) are concentrated at one point, and every two adjacent baffles (202) are in a sealed fit.

7. A machining limiting fixture structure according to claim 5, characterized in that: An annular protrusion (200a) is fixed on the outer surface of the oil storage cylinder (200), and the bottom end surface of the annular protrusion (200a) overlaps the top end surface of the base (101).

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