CN210909016U - Special fixture for sprue bush and CNC (computer numerical control) machine tool - Google Patents

Abstract

The utility model discloses a sprue bush special fixture, including sprue bush frock and the tight positioner of clamp of setting in sprue bush frock upper end, the inner chamber has been seted up to the bottom of sprue bush frock, press from both sides tight positioner and can fix a position the sprue bush part after upwards penetrating from the bottom inner chamber of sprue bush frock and press from both sides tightly. Still disclose a CNC lathe, including CNC lathe body and the workstation that is used for processing, install the runner cover frock that is used for processing the part on the workstation, the runner cover frock is foretell runner's runner cover frock. The flat position of anchor clamps appearance design dependence step face comes the levelling, and three sides rely on three locking screw to lock the part, has the fit-up gap between middle frock clamp bore and runner part diameter, and the bottom surface of runner cover frock and part bottom surface then adsorb in work magnetism platform, realize the fastening processing and the quick clamping of part, can improve the machining precision simultaneously.

Description

Special fixture for sprue bush and CNC (computer numerical control) machine tool

Technical Field

The utility model belongs to the technical field of mechanical fixture, especially, relate to a sprue bush special fixture and CNC lathe.

Background

The upper end face of a sprue bush part (shown in figure 1) needs CNC machining, the precision error is 0-0.01 mm, and the relative perpendicularity of each face must be ensured by clamping during CNC machining during production due to high precision requirement, otherwise, partial face over-cutting is easy to occur during machining.

At present, no special clamp is used for processing, the bottom surface adsorption surface is less, the direct magnetic absorption disk is easy to move, and the clamp can only be clamped by virtue of a vice.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sprue bush special fixture and CNC lathe to solve the problem of background art.

In order to achieve the above object, the utility model discloses a concrete technical scheme of sprue bush special fixture and CNC lathe as follows:

the utility model provides a sprue bush special fixture, includes sprue bush frock and sets up the tight positioner of clamp in sprue bush frock upper end, the inner chamber has been seted up to the bottom of sprue bush frock, press from both sides tight positioner and can fix a position the sprue bush part after upwards penetrating from the bottom inner chamber of sprue bush frock and press from both sides tightly.

Furthermore, press from both sides tight positioner including setting up the locking screw of cavity boss, cavity boss lateral wall threaded connection screw in of sprue bush frock upper end, thereby through with thereby the locking screw in contradicts the sprue bush part in the cavity of cavity boss and realizes that the location is pressed from both sides tightly.

Furthermore, the number of the locking screws is at least three, and the locking screws are annularly distributed by taking the hollow boss as the center.

Further, the sprue bush tool is of a stepped structure, a processing leveling flat position opening is formed in the side wall of the corner of the step, and the side face of the sprue bush part forms a planar sprue bush flat position and the processing leveling flat position opening is overlapped and flushed to achieve calibration.

Furthermore, the hollow boss is a cylinder with a hollow circular tube cavity, one side wall of the cylinder is cut into a flat wall, and the flat wall and the processing leveling flat position opening are arranged in a flush mode.

Furthermore, an orientation strip groove is further formed in the bottom of the sprue bush tool, an orientation pin is detachably inserted into the bottom of the sprue bush part, and the orientation pin is clamped into the orientation strip groove to achieve circumferential positioning.

The utility model provides a CNC lathe, includes CNC lathe body and the workstation that is used for processing, install the sprue cover frock that is used for processing the part on the workstation, the sprue cover frock is foretell sprue cover frock.

Further, the workbench is a working magnetic table, the sprue bush tool is made of a magnetic material, and the working magnetic table and the sprue bush tool are magnetically adsorbed to be positioned and installed.

Compared with the prior art, the utility model discloses following beneficial effect has:

because the sprue bush special fixture realizes rapid clamping on the sprue part, CNC machining is faster, more stable and easier to operate, the control of part precision tolerance is realized, the batch production rate is up to more than 95%, and the efficiency is improved by more than 50% compared with the prior machining method.

Drawings

FIG. 1 is a schematic view of a sprue bushing component;

FIG. 2 is an assembly view of the part holder;

FIG. 3 is an exploded view of the part holder;

FIG. 4 is a schematic view of the assembly process of the part holder;

FIG. 5 is a top view of FIG. 2;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a side view of FIG. 5;

FIG. 8 is a simulated view of a CNC milled part prior to modification;

FIG. 9 is a simulation of a CNC milled part using the present design fixture after modification.

The reference numbers in the figures illustrate: the device comprises a sprue bush part 1, a sprue bush 2, a sprue bush tool 3, a locking screw 4, a sprue bush flat position 5, a working magnetic table 6, a machining leveling flat position opening 7, a directional pin 8, a hollow boss 9, a CNC (computerized numerical control) to-be-machined end face 10, a vice 11 and a standard stop block 12.

Detailed Description

For a better understanding of the objects, structure and function of the invention, reference should be made to the drawings, FIGS. 1-9, which are included to illustrate the invention.

As shown in figure 1, the upper end face of a sprue bush part 1 is a CNC end face 10 to be machined, CNC machining is needed, the precision error is 0-minus 0.01mm, and due to the fact that the precision requirement is high, clamping must be carried out during CNC machining during production to guarantee the relative perpendicularity of each face, otherwise, partial face over-cutting is prone to occurring during machining. The clamping can only be realized by the vice 11, such as the clamping mode in fig. 8, but the clamping surface is a circular arc surface, the clamping surface is less, the stress is uneven, the clamping precision of the vice 11 is required, and the verticality is difficult to guarantee.

And the utility model discloses a runner cover special fixture who designs just can realize swift, stable, easily operation, and has realized part precision tolerance's controllable, the utility model discloses an innovation point lies in: as shown in fig. 2, 3 and 9, the clamp is designed into a square clamp, a flat position is leveled by a step surface (namely, a leveling flat position opening 7) in front, parts are locked by three locking screws 4 on three sides, an assembly gap is formed between the caliber of the middle tool clamp and the diameter of a sprue part, the bottom surface of the sprue bush tool 3 and the bottom surface of the parts are adsorbed on a working magnetic table 6, and the fastening processing and the quick clamping of the parts are realized.

The designed fixture structure comprises a sprue bush tool 3 and a clamping and positioning device arranged at the upper end of the sprue bush tool 3, an inner cavity is formed in the bottom of the sprue bush tool 3, and the clamping and positioning device can be used for positioning and clamping a sprue bush part 1 penetrating upwards from the inner cavity in the bottom of the sprue bush tool 3. Wherein, press from both sides tight positioner including setting up the locking screw 4 of cavity boss 9, the 9 lateral walls threaded connection screw in of cavity boss of 3 upper ends of sprue bush frock, thereby it is tight to realize the location through conflicting sprue bush part 1 with locking screw 4 screw in to the cavity of cavity boss 9. As shown in fig. 3, the number of the locking screws 4 is at least three, and the locking screws 4 are annularly distributed by taking the hollow boss 9 as a center, preferably, the number of the locking screws 4 is three, the three locking screws 4 are arranged at 90 degrees, and the positioning and calibration are performed in three directions.

As shown in FIG. 2, the leveling flat position opening 7 and the sprue bush flat position 5 of the part are machined in the other direction for calibration and alignment, so that the four circumferential surfaces can be quickly clamped and positioned. Wherein, preferred cavity boss 9 is the cylinder that has cavity pipe cavity, and a lateral wall of this cylinder is cut flat wall, and flat wall flushes the setting with processing levelling flat position mouth 7, and runner cover frock 3 is the notch cuttype structure, and has seted up processing levelling flat position mouth 7 at the lateral wall of ladder corner, and it flushes the realization calibration to form planar runner cover flat position 5 and the coincidence of processing levelling flat position mouth 7 through runner cover part 1 side. As shown in fig. 4, further optimization is performed, a directional strip groove is further formed in the bottom of the sprue bush tool 3, a directional pin 8 is detachably inserted into the bottom of the sprue bush part 1, and the directional pin 8 is clamped into the directional strip groove to achieve circumferential positioning.

As shown in fig. 8, the existing CNC machine tool comprises a CNC machine tool body and two main body structures of a workbench for processing, the CNC machine tool is selected to mill under normal conditions, vice 11 clamping or magnetic-attraction standard stop block 12 clamping is adopted, the batch production efficiency is low, the operation is difficult and the clamping is complicated, therefore, the designed fixture is used in the CNC machine tool, a sprue bush tool 3 for processing parts is installed on the workbench, and the sprue bush tool 3 is the sprue bush tool 3. As shown in fig. 2 and 9, the working magnetic table 6 is selected as the working table, the sprue bush tool 3 is made of a magnetic material, and the working magnetic table 6 and the sprue bush tool 3 are magnetically adsorbed to be positioned and installed. The clamped part is placed in the front side, the CNC machining position faces upwards, the tool and the part are adsorbed on the working magnetic table 6, then the locking screw 4 is fastened, the flat position 5 of the part sprue bush is leveled, and finally whether the locking screw 4 is attached to the flat position, whether the working magnetic table 6 is magnetized or not and whether the flat position is leveled or not are checked.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims (8)

1. The utility model provides a runner cover special fixture which characterized in that: the inner cavity is formed in the bottom of the sprue bush tool (3), and the sprue bush part (1) penetrating upwards from the inner cavity in the bottom of the sprue bush tool (3) can be positioned and clamped tightly by the clamping and positioning device.

2. The special fixture for the sprue bush according to claim 1, wherein the clamping and positioning device comprises a hollow boss (9) arranged at the upper end of the sprue bush tool (3), and a locking screw (4) screwed into the side wall of the hollow boss (9) in a threaded manner, and the locking screw (4) is screwed into a hollow cavity of the hollow boss (9) to abut against the sprue bush part (1) so as to realize positioning and clamping.

3. The sprue bush-dedicated jig according to claim 2, wherein the number of the locking screws (4) is at least three, and the locking screws (4) are annularly distributed with the hollow boss (9) as a center.

4. The special fixture for the sprue bush according to claim 3, wherein the sprue bush tool (3) is of a stepped structure, a machining leveling flat position opening (7) is formed in a side wall at a corner of a step, and the sprue bush flat position (5) in a planar shape formed on the side surface of the sprue bush part (1) and the machining leveling flat position opening (7) are overlapped and leveled to realize calibration.

5. The sprue bushing clamp according to claim 4, characterized in that the hollow boss (9) is a cylinder with a hollow circular tube cavity, and one side wall of the cylinder is cut into flat walls, and the flat walls are flush with the machining leveling flat mouth (7).

6. The special fixture for the sprue bush according to claim 1, wherein a directional strip groove is further formed in the bottom of the sprue bush tool (3), a directional pin (8) is detachably inserted into the bottom of the sprue bush part (1), and the directional pin (8) is clamped into the directional strip groove to achieve circumferential positioning.

7. The utility model provides a CNC lathe, includes CNC lathe body and the workstation that is used for processing, install runner cover frock (3) that are used for processing the part on the workstation, its characterized in that: the sprue bush tool (3) is the sprue bush tool (3) according to any one of claims 1-6.

8. The CNC machine tool according to claim 7, characterized in that the workbench is a working magnetic bench (6), the sprue bush tool (3) is made of magnetic materials, and the working magnetic bench (6) and the sprue bush tool (3) are positioned and installed through magnetic adsorption.

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