High-precision positioning and locking jig of CNC machine tool

Abstract

The utility model discloses a high-precision positioning material locking jig of a CNC machine tool. The positioning and locking jig comprises a lifting seat, an upper locking column, a lower positioning block, a locking sleeve and a locking air cylinder, wherein a plurality of vertical base blocks are arranged at the inner end of the lifting seat at equal intervals; the upper end of the upper locking column is vertically and slidably connected with a low-friction guide sleeve in the vertical base block, and a vertical spring is arranged between the upper locking column and the low-friction guide sleeve; a plurality of lower positioning blocks are symmetrically mounted below the two sides of the material loading plate or the feeding rack, and each lower positioning block is opposite to one upper locking column up and down; the locking sleeve is connected below the vertical positioning hole of the lower positioning block; locking cylinders are connected with two ends of the lifting seat; the locking air cylinder is pulled downwards to enable the multiple upper locking columns to move downwards to penetrate through the lateral positioning holes of the workpiece, the long round through holes of the material carrying plate and the vertical positioning holes and to be held tightly by the locking sleeve, and the other upper locking columns press the workpiece in a floating mode under the action of the vertical springs. The utility model has the effects of accurate workpiece positioning, constant position, high processing precision, high yield and high fixture application flexibility.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control equipment field, especially a kind of high-precision positioning lock material jig of CNC machine tool. BACKGROUND

[0002] Current CNC numerical control machine tool is widely used in precision machining field, CNC machine tool pursues higher machining accuracy and machining flexibility, CNC machine tool needs to position product in machining, customer product variety is complex and various, current positioning mode using lower positioning pin and upper positioning hole, its problem is as follows: first, existing positioning mechanism sheet is easy to shift, there is inaccuracy of positioning phenomenon, cause machining accuracy to reduce;Second, product exists jumping phenomenon when being subjected to larger cutting load in machining, cause product precision to be low, good product rate is low;Third, it cannot match to satisfy complex product of frequent change, each product needs a kind of specially-made jig to fix, thus cause machining cost to rise, simultaneously the applicable flexibility of jig is seriously reduced, simultaneously need to frequently change jig, cause production efficiency to reduce. SUMMARY

[0003] In order to solve one or more of the above problems, the utility model provides a kind of high-precision positioning lock material jig of CNC machine tool.

[0004] According to one aspect of the utility model, the high-precision positioning lock material jig of the CNC machine tool includes:

[0005] Lifting seat, two lifting seats are symmetrically installed on the two sides of the feeding rack of CNC machine tool, and a plurality of vertical base blocks are arranged at equal intervals at the inner end of the lifting seat, and a power connecting block is symmetrically arranged at the outer end of the lifting seat, and a low-friction guide sleeve is installed in the vertical base block.

[0006] Upper locking column, the upper end of the upper locking column is vertically and slidably connected to the low-friction guide sleeve, and a vertical spring is arranged between the middle shoulder of the upper locking column and the vertical base block.

[0007] Lower positioning block, a plurality of lower positioning blocks are symmetrically installed on the two sides of the feeding rack or the two sides of the material carrying plate, each lower positioning block is opposite to an upper locking column, and the vertical positioning hole of the lower positioning block is in diameter matching with the upper locking column.

[0008] Locking sleeve, the locking sleeve is connected to the vertical positioning hole of the lower positioning block, and the locking sleeve clamps the lower end of the upper locking column.

[0009] Locking cylinder, the cylinder base of the locking cylinder is fixedly connected to the two side walls of the feeding rack, and the cylinder rod thereof is threadedly connected to the power connecting block.

[0010] The carrier plate is symmetrically provided with a plurality of long circular through holes matched with the upper locking columns on both sides, each long circular through hole is vertically positioned to the vertical positioning hole of the plurality of lower positioning blocks, and the center lines of the long circular through holes, the vertical positioning holes, the upper locking columns and the locking sleeves are located in two symmetric vertical planes;

[0011] The workpiece is placed on the carrier plate with the lateral positioning hole located above the long circular through hole, the carrier plate is moved to the machining position and is attached to the lower positioning block, the lateral positioning hole is located directly below the upper locking column and the long circular through hole is located directly above the vertical positioning hole, the locking cylinder is pulled down to move the plurality of upper locking columns downward through the lateral positioning hole, the long circular through hole and the vertical positioning hole and is tightly held by the locking sleeve, and the remaining upper locking columns are floatingly pressed against the upper surface of the workpiece on both sides under the action of the vertical spring, so that the workpiece is accurately positioned and locked during machining.

[0012] In some embodiments, the vertical base block is provided with a vertical guide sliding hole in the center, the upper end of the guide sliding hole is provided with a large-diameter upper mounting groove, and the upper mounting groove is provided with an interference shaft sleeve low-friction guide sleeve.

[0013] In some embodiments, the low-friction guide sleeve is any one of a self-lubricating copper sleeve embedded with graphite, a low-friction coefficient Teflon sleeve and a linear bearing.

[0014] In some embodiments, the lower end of the guide sliding hole is provided with a large-diameter buffer groove, the lower end of the vertical spring is attached to the shoulder and the upper end is attached to the upper groove wall of the buffer groove.

[0015] In some embodiments, the upper end of the upper locking column is provided with a large-diameter upper end ring and the lower end is provided with a semispherical structure guide ball head.

[0016] In some embodiments, the center of the carrier plate is provided with a positioning pin, and the center hole of the workpiece is positioned and connected to the positioning pin.

[0017] In some embodiments, the locking sleeve is a circular ring sleeve made of elastic rubber material, and the locking sleeve is installed in the annular groove below the vertical positioning hole.

[0018] In some embodiments, the locking sleeve is an electromagnetic lock, the electromagnetic lock is installed on the lower surface of the lower positioning block, and the lock hole of the electromagnetic lock is directly opposite to the vertical positioning hole.

[0019] In some embodiments, the outer end of the lifting seat is symmetrically provided with two power connecting blocks, and the cylinder seats of the two locking cylinders are fixedly connected to the two sides of the feeding rack.

[0020] Or the outer end of the lifting seat is provided with a power connecting block in the center, and the cylinder seat of the locking cylinder is fixedly connected to the outer center of the feeding rack.

[0021] In some embodiments, the center of the power connecting block is provided with a threaded hole, and the cylinder rod is fixedly connected to the threaded hole.

[0022] Or the power block center is provided with a first through hole, and the cylindrical head screw is threadedly connected with the mounting screw hole of the upper end surface of the cylinder rod through the first through hole.

[0023] The high-precision positioning and locking jig for the CNC machine tool is characterized in that a plurality of sets of elastic floating upper locking columns and lower positioning blocks subjected to vertical spring action are vertically sleeved and positioned, and are fixedly connected by a locking sleeve, and the remaining upper locking columns are elastically pressed, so that stable positioning and locking are realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a front view of a high-precision positioning and locking jig for a CNC machine tool according to an embodiment of the present application;

[0025] Figure 2 FIG. 2 is an A-A sectional view of the high-precision positioning and locking jig shown in FIG. 1; Figure 1

[0026] Figure 3 FIG. 3 is a B-B sectional view of the high-precision positioning and locking jig shown in FIG. 1; Figure 1

[0027] Figure 4 FIG. 4 is a C-C sectional view of the high-precision positioning and locking jig shown in FIG. 1; Figure 1

[0028] Figure 5 FIG. 5 is a top view of the high-precision positioning and locking jig shown in FIG. 1; Figure 1

[0029] Figure 6 FIG. 6 is a partial sectional view of the high-precision positioning and locking jig shown in FIG. 1; Figure 5

[0030] Figure 7 FIG. 7 is a top view of the high-precision positioning and locking jig installed in a feeding machine of a CNC machine tool shown in FIG. 1; Figure 5

[0031] ​​​​​​Lifting seat 1, vertical base block 10, guide sliding hole 100, upper mounting groove 101, buffer groove 102, power connecting block 11, first through hole 111;

[0032] Upper locking column 2, shoulder 21, upper end ring 22, guide ball head 23;

[0033] Lower positioning block 3, vertical positioning hole 31, ring groove 32;

[0034] Locking sleeve 4; locking cylinder 5, mounting screw hole 51; load carrying plate 6, oblong through hole 61;

[0035] Low-friction guide sleeve 7; vertical spring 8; cylindrical head screw 9;

[0036] Workpiece 00, lateral positioning hole 001;

[0037] Feeding frame 01, longitudinal end beam 010, transverse shaft 011;

[0038] Longitudinal movement transmission assembly 02;

[0039] Variable distance assembly 03, variable distance beam 030, variable distance transmission system 031;

[0040] High-precision positioning and locking fixture 04. DETAILED DESCRIPTION

[0041] The utility model will be further described in detail below in combination with the drawings. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component.

[0042] Figures 1 to 7 A high-precision positioning and locking fixture for a CNC machine according to an embodiment of the utility model is schematically shown. As shown in the figure, the high-precision positioning and locking fixture for a CNC machine includes:

[0043] Lifting seat 1, two lifting seats 1 are symmetrically installed on both sides of the feeding frame 01 of the CNC machine, a plurality of vertical base blocks 10 are arranged at equal intervals at the inner end of the lifting seat 1, and a power connecting block 11 is symmetrically arranged at the outer end of the lifting seat 1, and a low-friction guide sleeve 7 is installed in the vertical base block 10. The low-friction guide sleeve 7 is preferably any one of a self-lubricating copper sleeve with graphite embedded, a Teflon sleeve with a low friction coefficient, and a linear bearing.

[0044] Upper locking column 2, upper locking column 2 upper end vertical sliding connection low-friction guide sleeve 7, upper locking column 2 middle shoulder 21 and vertical base block 10 between equipped with vertical spring 8;

[0045] Lower positioning block 3, several lower positioning blocks 3 are symmetrically installed on the lower side of the material carrying plate 6 or the lower side of the feeding rack 01, each lower positioning block 3 is opposite to an upper locking column 2, the vertical positioning hole 31 of the lower positioning block 3 is matched with the upper locking column 2;

[0046] Locking sleeve 4, the locking sleeve 4 is connected below the vertical positioning hole 31 of the lower positioning block 3, and the locking sleeve 4 clamps the lower end of the upper locking column 2;

[0047] Locking cylinder 5, the cylinder base of the locking cylinder 5 is fixedly connected to the side walls of the feeding rack 01, and the cylinder rod of the locking cylinder 5 is threadedly connected to the power connecting block 11;

[0048] Material carrying plate 6, the material carrying plate 6 is symmetrically provided with several long circular through holes 61 on the two sides and matched with the upper locking column 2, each long circular through hole 61 is opposite to the vertical positioning hole 31 of the plurality of lower positioning blocks 3, and the center lines of the long circular through holes 61 on the two sides, the vertical positioning holes 31, and the upper locking column 2 and the locking sleeve 4 are located in two symmetric vertical planes;

[0049] The workpiece 00 is placed on the material carrying plate 6 and the lateral positioning hole 001 is located above the long circular through hole 61, the material carrying plate 6 moves to the machining position and is attached to the lower positioning block 3, the lateral positioning hole 001 is located directly below the upper locking column 2 and the long circular through hole 61 is located directly above the vertical positioning hole 31, the locking cylinder 5 is pulled down to make the plurality of upper locking columns 2 move downward and pass through the lateral positioning hole 001, the long circular through hole 61, and the vertical positioning hole 31 and be clamped by the locking sleeve 4, and the remaining upper locking columns 2 are elastically pressed and attached to the upper surfaces of the two sides of the workpiece 00 under the action of the vertical spring 8, so as to realize high-precision positioning and locking of the workpiece 00 during machining.

[0050] The high-precision positioning and locking jig of the CNC machine tool adopts a plurality of groups of upper locking columns 2 and lower positioning blocks 3 which are elastically floated under the action of the vertical spring 8 and are positioned in a sleeved manner, and the remaining upper locking columns 2 are elastically pressed, so as to realize stable positioning and locking, which has the beneficial effects that: first, the workpiece 00 is locked and fixed with high precision and is elastically floated and pressed, the position is fixed during machining, and the workpiece does not move left and right, so the machining precision is high, and the workpiece is locked and fixed upward and downward, can withstand a large load without jumping upward and downward, and the machining precision is further improved, and the yield is high; second, the material carrying plate 6 is provided with the long circular through hole 61, can be matched with the lateral positioning hole 001 at different positions, effectively matches various frequently changed products, a jig meets the positioning and locking needs of various products, effectively reduces the cost of product jigs, makes the jig have high flexibility, and jigs do not need to be frequently changed during production, so the production efficiency is greatly improved; third, the low-friction guide sleeve 7 is arranged in sliding connection with the upper locking column 2, effectively reduces the jamming resistance, improves the smoothness of upward and downward movement, and ensures the effectiveness of the jig; and fourth, the locking cylinder 5 is used for fixing, can ensure the stability and straightness of the vertical movement power.

[0051] Preferably, the vertical base block 10 is provided with a vertical guide sliding hole 100 in the center, and a large-diameter upper mounting groove 101 is arranged at the upper end of the guide sliding hole 100, and a low-friction guide sleeve 7 is arranged in the upper mounting groove 101 in an interference fit. The beneficial effect is that the arrangement ensures high installation accuracy of the low-friction guide sleeve 7, ensures high straightness of the movement of the upper locking column 2, and ensures good compression and locking.

[0052] Preferably, a large-diameter buffer groove 102 is arranged at the lower end of the guide sliding hole 100, and the lower end of the vertical spring 8 is attached to the shoulder 21 and the upper end is attached to the upper groove wall of the buffer groove 102. The beneficial effect is that the arrangement ensures high installation accuracy of the vertical spring 8, effectively realizes vertical floating and damping effect.

[0053] Preferably, the upper locking column 2 is provided with a large-diameter upper end ring 22 at the upper end and a round corner structure guide ball head 23 at the lower end. The beneficial effect is that the upper end ring 22 effectively limits the lower position, and the guide ball head effectively locates, ensuring quick and effective alignment and installation.

[0054] Further, the center of the loading plate 6 is provided with a positioning pin, and the center hole of the workpiece 00 is connected to the positioning pin. The beneficial effect is that the arrangement of the positioning pin and the center hole can further ensure that there is no position movement during movement.

[0055] Preferably, the locking sleeve 4 is a circular ring sleeve made of elastic rubber material, and the locking sleeve 4 is installed in the ring groove 32 below the vertical positioning hole 31. The beneficial effect is that the elastic material locking sleeve 4 has a simple structure, is convenient to install and fix, and has good locking force at the same time.

[0056] Preferably, the locking sleeve 4 is an electromagnetic lock, and the electromagnetic lock is installed on the lower surface of the lower positioning block 3, and the lock hole of the electromagnetic lock is opposite to the vertical positioning hole 31. The beneficial effect is that the electromagnetic lock has greater locking force, and can realize better position stability and impact resistance.

[0057] Preferably, two power connecting blocks 11 are symmetrically arranged at the outer end of the lifting seat 1, and the cylinder seats of the two locking cylinders 5 are fixedly connected to the two sides of the feeding rack 01; or one power connecting block 11 is arranged at the center of the outer end of the lifting seat 1, and the cylinder seat of the locking cylinder 5 is fixedly connected to the center of the outer side of the feeding rack 01. The beneficial effect is that the symmetrically arranged locking cylinders 5 or the centrally arranged locking cylinders 5 can realize good up-down movement and ensure high straightness precision of the output movement.

[0058] Preferably, the power connecting block 11 is provided with a threaded hole in the center, and the cylinder rod is fixedly connected to the threaded hole. The beneficial effect is that the structure is simple and the overall volume is small.

[0059] The power connecting block 11 is provided with a first through hole 111 in the center, and a cylindrical head screw is threadedly connected to the mounting screw hole on the upper end surface of the cylinder rod through the first through hole 111. The beneficial effect is that the connection structure is convenient to install and fix.

[0060] Further, the feeding machine comprises a feeding machine frame 01, a high-precision positioning and locking jig 04 mounted on the feeding machine frame 01, a longitudinal movement transmission assembly 02, and a variable-distance assembly 03; the loading plate 6 is connected to the longitudinal movement transmission assembly 02, the feeding machine frame 01 is a rectangular frame formed by connecting a plurality of transverse shafts 011 in the middle of two longitudinal end beams 010 and provided with a variable-distance beam 030 in the middle, and the locking cylinder 5 is fixedly connected to one variable-distance beam 030 and one longitudinal end beam 010. The beneficial effect is that the jig can be directly applied to the existing feeding machine and is suitable for equipment upgrading.

[0061] The variable-distance beam 012 is slidingly connected to the transverse shaft 011 between the two end beams 010, the two ends of the variable-distance screw shaft of the variable-distance assembly 03 are rotatably connected to the two end beams 010, and the nut matched with the two end beams 010 is fixedly connected to the variable-distance beam 012, one end of the variable-distance screw shaft is connected to the variable-distance transmission system 031, and the motor of the variable-distance transmission system 031 is fixedly connected to the middle of the right end beam 010; preferably, the variable-distance transmission system 031 and the longitudinal movement transmission assembly 02 are both synchronous belt transmission systems driven by servo motors. The beneficial effect is that the variable-distance structure of the feeding machine has high adjustment precision and is suitable for various sheet products.

[0062] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A high-precision positioning and locking jig for a CNC machine tool, characterized in that, The utility model relates to a high-precision positioning locking device for CNC machine tool, including: Lifting seat (1), two the lifting seat (1) symmetry is installed on the feed frame (01) both sides of CNC machine tool, the lower symmetry of inside end of the lifting seat (1) is equipped with a plurality of vertical base block (10) and is equipped with power joint block (11) outward, vertical base block (10) inside installation low friction guide sleeve (7), Upper locking column (2), the upper end vertical sliding connection low friction guide sleeve (7) of upper locking column (2), the middle shoulder (21) of upper locking column (2) is equipped with vertical spring (8) between vertical base block (10), Lower positioning block (3), a plurality of lower positioning block (3) symmetry is installed in the lower both sides of load plate (6) or the lower both sides of feed frame (01), and each lower positioning block (3) and one upper locking column (2) are opposite, and the vertical positioning hole (31) of lower positioning block (3) and upper locking column (2) are equal diameter cooperation, Locking sleeve (4), the vertical positioning hole (31) of locking sleeve (4) is connected in the lower positioning block (3), and the lower end of locking sleeve (4) clamps the upper locking column (2), Locking cylinder (5), the cylinder base of locking cylinder (5) is fixedly connected on the both sides wall of feed frame (01) and its cylinder rod is threadedly connected power joint block (11), Load plate (6), the both sides symmetry of load plate (6) is equipped with a plurality of clearance fit long circular through -hole (61) with upper locking column (2), and each long circular through -hole (61) is opposite a plurality of vertical positioning hole (31) of lower positioning block (3), and the center line of long circular through -hole (61), vertical positioning hole (31) and upper locking column (2), locking sleeve (4) is located in two symmetry vertical surfaces, Workpiece (00) is placed on load plate (6) and its lateral positioning hole (001) is located above long circular through -hole (61), load plate (6) moves to the processing position and is attached to lower positioning block (3), lateral positioning hole (001) is located directly below upper locking column (2) and long circular through -hole (61) is located directly above vertical positioning hole (31), locking cylinder (5) is pulled down and makes a plurality of upper locking column (2) move downward and pass through lateral positioning hole (001), long circular through -hole (61), vertical positioning hole (31) and is embraced by locking sleeve (4), and the rest upper locking column (2) is floatingly pressed and attached to the upper surface of workpiece (00) both sides under the action of vertical spring (8), realize the high-precision positioning locking workpiece (00) when processing.

2. The high-precision positioning locking jig according to claim 1, wherein The vertical base block (10) is provided with a vertical guide sliding hole (100) in the center, the upper end of the guide sliding hole (100) is provided with a large-diameter upper mounting groove (101), and the low-friction guide sleeve (7) is fitted into the upper mounting groove (101).

3. The high-precision positioning locking jig according to claim 2, wherein The low-friction guide sleeve (7) is any one of a self-lubricating copper sleeve with embedded graphite, a low-friction coefficient Teflon sleeve, and a linear bearing.

4. The high-precision positioning locking jig according to claim 2, wherein The lower end of the vertical spring (8) is attached to the shoulder (21), and the upper end is attached to the upper groove wall of the buffer groove (102).

5. The high-precision positioning locking jig according to any one of claims 1 to 4, characterized by The upper end of the upper locking column (2) is provided with a large-diameter upper end ring (22), and the lower end is provided with a spherical structure guide ball head (23).

6. The high-precision positioning locking jig according to claim 5, wherein The carrier plate (6) is provided with a positioning pin in the center, and the center hole of the workpiece (00) is connected to the positioning pin.

7. The high precision positioning locking fixture of claim 1, wherein, The locking sleeve (4) is a circular sleeve made of elastic rubber material, and the locking sleeve (4) is installed in the annular groove (32) below the vertical positioning hole (31).

8. The high precision positioning locking fixture of claim 1, wherein, The locking sleeve (4) is an electromagnetic lock, the electromagnetic lock is installed on the lower surface of the lower positioning block (3), and the lock hole of the electromagnetic lock is opposite to the vertical positioning hole (31).

9. The high precision positioning locking work fixture according to claim 1, wherein The outer end of the lifting seat (1) is symmetrically provided with two power connecting blocks (11), and the cylinder seats of the two locking cylinders (5) are fixedly connected to the two sides of the feeding rack (01). Or the outer end of the lifting seat (1) is provided with a power connecting block (11) in the center, and the cylinder seat of the locking cylinder (5) is fixedly connected to the center of the outer side of the feeding rack (01).

10. The high-precision positioning locking jig according to claim 9, wherein The power connecting block (11) is provided with a threaded hole in the center, and the cylinder rod is fixedly connected to the threaded hole. Or the power connecting block (11) is provided with a first through hole (111) in the center, and the cylinder rod is threadedly connected to the mounting screw hole (51) on the upper end face through the first through hole (111).

Images