Universal clamp for CNC machining
By designing a universal fixture that includes a base plate, an L-shaped support, and a cylinder, the workpiece is automatically clamped, solving the problems of low clamping efficiency and insufficient accuracy of existing CNC fixtures. This achieves efficient and accurate workpiece fixation and reduces processing costs.
Patent Information
- Application Number
- CN202422752639.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Existing CNC fixtures suffer from low clamping efficiency, lack of precision, and limited applicability to workpieces, thus increasing processing costs.
A universal fixture comprising a base plate, an L-shaped support, and a cylinder was designed. The workpiece is automatically clamped by the cylinder output shaft, thus fixing the length and width of the workpiece. The width and height protrusions prevent cutting chips from remaining, thereby improving clamping efficiency and accuracy.
Automatic clamping is achieved, which improves clamping efficiency and accuracy, enhances the versatility of workpieces, is applicable to most workpieces, and reduces processing costs.
Smart Images
Figure CN223557820U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of fixture especially relates to a general fixture for CNC machining. BACKGROUND
[0002] CNC is numerical control machine tool, it is a kind of automatic machine tool equipped with program control system, and the workpiece needs to be positioned by cooperating with fixture when CNC machining center processes workpiece.The existing CNC fixture is usually the mode of worker mounting and clamping, and the mounting and clamping efficiency is low and the precision is insufficient, and the workpiece that can be clamped is relatively single, the application range is small, and further increase the processing cost. UTILITY MODEL CONTENTS
[0003] The utility model provides a general fixture for CNC machining, automatically clamps, improves mounting and clamping efficiency and precision, and is widely used.
[0004] The utility model discloses a general fixture for CNC machining adopts the technical scheme of:
[0005] A general fixture for CNC machining, including the bottom plate, the top surface of bottom plate is equipped with first support and second support, the first support and second support are all L-shaped, the bottom surface of first support through mouth and the bottom surface of second support through mouth are located on the same horizontal plane, the side of first support through mouth is first width reference surface, one side of first support through mouth is equipped with first width jacking cylinder, the output shaft of first width jacking cylinder is towards first width reference surface setting, the side of second support through mouth is second width reference surface, second width reference surface and first width reference surface are located on the same vertical plane, one side of second support through mouth is equipped with second width jacking cylinder, the output shaft of second width jacking cylinder is towards second reference surface setting, the side of first support through mouth away from second support is equipped with length support, the side of length support close to second support is length reference surface, one side of second support through mouth away from first support is equipped with length jacking cylinder, the output shaft of length jacking cylinder is towards length reference surface setting.
[0006] As preferred scheme, the first width reference surface is evenly provided with a plurality of first width protrusions, the second width reference surface is evenly provided with a plurality of second width protrusions, and the height of the second width protrusion is equal to the height of the first width protrusion.
[0007] As preferred scheme, the bottom surface of first support through mouth is evenly provided with a plurality of first height protrusions, the bottom surface of second support through mouth is evenly provided with a plurality of second height protrusions, and the height of the second height protrusion is equal to the height of the first height protrusion.
[0008] As a preferred scheme, the third support is arranged between the first support and the second support, the top surface of the third support is located at the same horizontal plane as the bottom surface of the first support, and the top surface of the third support is uniformly provided with a plurality of third height protrusions, the height of the third height protrusion is equal to the height of the first height protrusion.
[0009] As a preferred scheme, the length reference surface is uniformly provided with a plurality of length protrusions.
[0010] As a preferred scheme, the end of the length top pressing cylinder output shaft is fixedly sleeved with a positioning shaft sleeve.
[0011] As a preferred scheme, the first support is provided with a height pressing cylinder away from the side of the first width top pressing cylinder, the output shaft of the height pressing cylinder is vertically upwardly arranged, the end of the height pressing cylinder output shaft is rotatably provided with a pressing rod, the pressing rod extends to above the first support opening away from the end of the height pressing cylinder, the top end of the height pressing cylinder is provided with a mounting block, a connecting rod is rotatably arranged on the mounting block, and the end of the connecting rod away from the mounting block is rotatably connected with the middle part of the pressing rod.
[0012] The utility model discloses a general fixture for CNC machining beneficial effect is: the both ends of workpiece are placed respectively on the bottom surface of first support opening and the bottom surface of second support opening, and one end of workpiece is pressed against length reference surface, and one side of workpiece is pressed against first width reference surface and second width reference surface, drives length top pressing cylinder, until the output shaft of length top pressing cylinder is pressed against the other end of workpiece, realizes the fixation of workpiece length direction, drives first width top pressing cylinder and second top pressing cylinder, until two output ends are pressed against the other side of workpiece, realizes the fixation of workpiece width direction, and the automatic clamping improves the clamping efficiency and accuracy, and can be applicable to most workpieces, and the versatility is strong. ACCURACY
[0013] Figure 1 It is a structure schematic diagram of a general fixture for CNC machining of the utility model from the first visual angle.
[0014] Figure 2 It is a structure schematic diagram of a general fixture for CNC machining of the utility model from the second visual angle.
[0015] 10, bottom plate; 11, first support; 111, first height protrusion; 12, second support; 121, second height protrusion; 13, third support; 131, third height protrusion; 20, first width reference surface; 21, first width clamping cylinder; 22, first width protrusion; 30, second width reference surface; 31, second width clamping cylinder; 32, second width protrusion; 40, length support; 41, length reference surface; 42, length clamping cylinder; 43, length protrusion; 44, positioning shaft sleeve; 50, height clamping cylinder; 51, pressing rod; 52, mounting block; 53, connecting rod. DETAILED DESCRIPTION
[0016] The utility model will be further described and explained in connection with specific embodiments and the accompanying drawings of the specification:
[0017] Please refer to Figure 1 and Figure 2 A general fixture for CNC machining, comprising a bottom plate 10, the top surface of the bottom plate 10 is provided with a first support 11 and a second support 12 at intervals, the first support 11 and the second support 12 are both L-shaped, the bottom surface of the through hole of the first support 11 and the bottom surface of the through hole of the second support 12 are located on the same horizontal plane, the side surface of the through hole of the first support 11 is the first width reference surface 20, the other side of the through hole of the first support 11 is provided with a first width clamping cylinder 21, the output shaft of the first width clamping cylinder 21 is arranged towards the first width reference surface 20, the side surface of the through hole of the second support 12 is the second width reference surface 30, the second width reference surface 30 and the first width reference surface 20 are located on the same vertical plane, the other side of the through hole of the second support 12 is provided with a second width clamping cylinder 31, the output shaft of the second width clamping cylinder 31 is arranged towards the second reference surface, the side surface of the length support 40 provided on the side of the through hole of the first support 11 away from the second support 12 is the length reference surface 41, the other side of the through hole of the second support 12 away from the first support 11 is provided with a length clamping cylinder 42, the output shaft of the length clamping cylinder 42 is arranged towards the length reference surface 41.
[0018] In the above scheme, the two ends of the workpiece are respectively placed on the bottom surface of the through hole of the first support 11 and the bottom surface of the through hole of the second support 12, one end of the workpiece abuts against the length reference surface 41, one side of the workpiece abuts against the first width reference surface 20 and the second width reference surface 30, the length clamping cylinder 42 is driven until the output shaft of the length clamping cylinder 42 abuts against the other end of the workpiece, the length direction of the workpiece is fixed, the first width clamping cylinder 21 and the second clamping cylinder are driven until the two output ends abut against the other side of the workpiece, the width direction of the workpiece is fixed, automatic clamping is realized, the clamping efficiency and accuracy are improved, and the fixture can be applied to most workpieces and has strong universality.
[0019] Please refer to Figure 2, the first width reference surface 20 is uniformly provided with a plurality of first width protrusions 22, and the second width reference surface 30 is uniformly provided with a plurality of second width protrusions 32, the height of the second width protrusions 32 being equal to the height of the first width protrusions 22.
[0020] In the above scheme, the first width protrusions 22 and the second width protrusions 32 can prevent the side surface of the workpiece from being completely attached to the first width reference surface 20 and the second width reference surface 30, leaving a gap for the cutting chips to flow out, preventing the cutting chips from remaining and affecting the machining size.
[0021] Please refer to Figure 1 and Figure 2 , the bottom surface of the first support 11 through hole is uniformly provided with a plurality of first height protrusions 111, and the bottom surface of the second support 12 through hole is uniformly provided with a plurality of second height protrusions 121, the height of the second height protrusions 121 being equal to the height of the first height protrusions 111.
[0022] In the above scheme, the first height protrusions 111 and the second width protrusions 32 can prevent the bottom surface of the workpiece from being completely attached to the bottom surface of the first support 11 through hole and the bottom surface of the second support 12 through hole, leaving a gap for the cutting chips to flow out, preventing the cutting chips from remaining and affecting the machining size.
[0023] Further, the third support 13 is provided between the first support 11 and the second support 12, the top surface of the third support 13 being located at the same horizontal plane as the bottom surface of the first support 11 through hole, and the top surface of the third support 13 being uniformly provided with a plurality of third height protrusions 131, the height of the third height protrusions 131 being equal to the height of the first height protrusions 111.
[0024] In the above scheme, the third support 13 can support the workpiece, improve the stability of the workpiece placement, and ensure the accuracy of the machining, and the top surface of the third support 13 is also provided with third height protrusions 131 equal in height to the first height protrusions 111, which are used in cooperation with the first height protrusions 111. In addition, the length reference surface 41 is uniformly provided with a plurality of length protrusions 43, which are also used to prevent the cutting chips from remaining and affecting the machining size.
[0025] Specifically, the end of the length jacking cylinder 42 output shaft is fixedly sleeved with a positioning shaft sleeve 44, which jacks the workpiece, protects the cylinder output shaft, increases the contact area with the workpiece, and enhances the jacking effect. In addition, the positioning shaft sleeve 44 can be replaced directly in the subsequent process, saving cost. It should be noted that the end of the first width jacking cylinder 21 output shaft and the end of the second width jacking cylinder 31 output shaft are also sleeved with positioning shaft sleeves 44, which have the same effect.
[0026] Please refer to Figure 1The first support 11 is provided with a height pressing cylinder 50 away from one side of the first width top pressing cylinder 21, the output shaft of the height pressing cylinder 50 is vertically upward, the end of the output shaft of the height pressing cylinder 50 is rotatably provided with a pressing rod 51, the pressing rod 51 extends to above the top opening of the first support 11 away from one end of the height pressing cylinder 50, the top end of the height pressing cylinder 50 is provided with a mounting block 52, the mounting block 52 is rotatably provided with a connecting rod 53, one end of the connecting rod 53 away from the mounting block 52 is rotatably connected with the middle part of the pressing rod 51.
[0027] In the above scheme, after the workpiece is placed on the first support 11 and the second support 12, the height pressing cylinder 50 is started to drive the one end of the pressing rod 51 to move upward, the pressing rod 51 is rotatably mounted on the mounting block 52 through the connecting rod 53, so that the other end of the pressing rod 51 moves downward until abutting against the top surface of the workpiece, the workpiece is further pressed, and the stability of the workpiece in the machining process is improved, and after the workpiece is machined, the one end of the pressing rod 51 is driven by the height pressing cylinder 50 to move downward to release the workpiece. In the embodiment, the height pressing assembly is also arranged at the second support 12, and the structure of the height pressing assembly at the second support 12 is the same as that of the height pressing assembly at the first support 11, so the description is not repeated.
[0028] The utility model provides a kind of general fixture for CNC machining, the two ends of workpiece are placed on the bottom surface of the first support top opening and the bottom surface of the second support top opening respectively, one end of workpiece abuts against length reference surface, one side of workpiece abuts against first width reference surface and second width reference surface, drive length top pressing cylinder, until the output shaft of length top pressing cylinder abuts against the other end of workpiece, realize the fixation of workpiece length direction, drive first width top pressing cylinder and second top pressing cylinder, until two output ends abut against the other side of workpiece, realize the fixation of workpiece width direction, automatic clamping, improve clamping efficiency and accuracy, and it can be applicable to most workpieces, and it is strong in universality.
[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, and are not limited to the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the utility model.
Claims
1. A universal fixture for CNC machining, characterized by, The utility model provides a kind of height-adjustable workbench, including bottom plate, the top surface of the bottom plate is spaced with first support and second support, the first support and second support are L-shaped, the bottom surface of the first support passageway is on the same horizontal plane with the bottom surface of second support passageway, the side of the first support passageway is first width reference surface, the other side of the first support passageway is equipped with first width top tight cylinder, the output shaft of the first width top tight cylinder is arranged towards first width reference surface, the side of the second support passageway is second width reference surface, the second width reference surface is on the same vertical plane with first width reference surface, the other side of the second support passageway is equipped with second width top tight cylinder, the output shaft of the second width top tight cylinder is arranged towards second reference surface, the side of the first support passageway away from second support side is equipped with length support, the side of the length support close to second support is length reference surface, the side of the second support passageway away from first support side is equipped with length top tight cylinder, the output shaft of the length top tight cylinder is arranged towards length reference surface.
2. A universal fixture for CNC machining as claimed in claim 1, wherein, The first width reference surface is uniformly provided with a plurality of first width protrusions, and the second width reference surface is uniformly provided with a plurality of second width protrusions.
3. A universal fixture for CNC machining as claimed in claim 1, wherein, The bottom surface of the first support passageway is uniformly provided with a plurality of first height protrusions, and the bottom surface of the second support passageway is uniformly provided with a plurality of second height protrusions.
4. A universal fixture for CNC machining as claimed in claim 3, wherein, The first support and the second support are provided with a third support therebetween, the top surface of the third support is on the same horizontal plane with the bottom surface of the first support passageway, the top surface of the third support is uniformly provided with a plurality of third height protrusions, and the height of the third height protrusions is equal to the height of the first height protrusions.
5. A universal fixture for CNC machining as claimed in claim 1, wherein, The length reference surface is uniformly provided with a plurality of length protrusions.
6. A universal fixture for CNC machining as claimed in claim 1, wherein, The end portion of the length top tight cylinder output shaft is fixedly sleeved with a positioning shaft sleeve.
7. A universal fixture for CNC machining as claimed in claim 1, wherein, The first support is provided with a height compression cylinder away from the first width top tight cylinder side, the output shaft of the height compression cylinder is vertically upward, the end portion of the height compression cylinder output shaft is rotatably provided with a pressing rod, the pressing rod extends to above the first support passageway away from the height compression cylinder end, the top end of the height compression cylinder is provided with a mounting block, the mounting block is rotatably provided with a connecting rod, and the connecting rod is rotatably connected with the middle part of the pressing rod away from the mounting block end.