CN214642004U

CN214642004U - Special clamp for tensioning, pulling and pressing type milling machine

Info

Publication number: CN214642004U
Application number: CN202120032949.5U
Authority: CN
Inventors: 韩忠冠; 赵磊; 魏平; 尹春艳
Original assignee: Anhui Technical College of Mechanical and Electrical Engineering
Current assignee: Anhui Technical College of Mechanical and Electrical Engineering
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-11-09
Anticipated expiration: 2031-01-07

Abstract

The utility model relates to an anchor clamps, in particular to tight formula milling machine special fixture of drop-down that rises has solved milling machine fixture's use problem. The clamp comprises a clamp body, the clamp body is provided with a reinforcing arm, a cylindrical positioning pin and a diamond pin, the cylindrical positioning pin and the diamond pin are used for calibrating and positioning the reinforcing arm, a tensioning assembly is arranged in the clamp body and comprises a threaded pull rod, a tensioning sleeve, a guide sleeve, a reset spring, a cylinder mounting plate and a thin cylinder, the clamp body is provided with a mounting hole, the upper end of the threaded pull rod extends out, a tensioning conical block is arranged at the upper end of a threaded railing, the tensioning sleeve is sleeved outside the threaded pull rod, the clamping and the dismounting are convenient, the positioning accuracy is not affected in the clamping process, the symmetry accuracy of front and back processing of a workpiece can be guaranteed, the clamp is suitable for batch part processing, the efficiency is improved, the pressing force is adjustable, the processed surface is not damaged, and the cutter path is not affected by the pressing device.

Description

Special clamp for tensioning, pulling and pressing type milling machine

Technical Field

The utility model relates to an anchor clamps, in particular to tight formula milling machine special fixture of drop-down that rises.

Background

The design of the numerical control milling machine tool fixture has very important influence on the working efficiency and the working accuracy of the numerical control milling machine tool fixture, along with the rapid development of the manufacturing industry in China, the practical application scale of the numerical control technology is also rapidly improved, and the numerical control milling machine tool fixture has the characteristics of high accuracy, high speed, compositing and the like, so that the numerical control milling machine tool fixture is widely applied to the field of manufacturing and processing. In the application process of the numerical control milling machine, the design of a tool fixture of the numerical control milling machine is one of important influence factors of the machining efficiency of the numerical control milling machine, and when a workpiece with a longer and narrower length is machined at present, particularly the workpiece with the front side, the back side and the periphery which need to be machined is required, the requirement on the symmetry degree is high, the conventional fixture cannot effectively fix the workpiece, the workpiece has a machining surface which is changed in the machining process, secondary positioning errors exist, the machining precision of the workpiece is influenced, and the fixture is low in efficiency and cannot adapt to large-batch machining. Since the conventional jig may cause damage to the workpiece or low precision, the manufacturing cost is increased, resulting in waste of resources.

Therefore, a set of special milling machine fixture is required to be designed so as to mill the surface of the slender workpiece, and the problems of symmetrical machining precision, quick clamping, machining efficiency and the like of the slender workpiece are solved.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a tight formula milling machine special fixture of lower pull-down that rises.

In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a tight clamp special fixture of push down compression type milling machine that rises, includes the anchor clamps body, be equipped with the cylinder locating pin and the diamond-shaped pin of strengthening arm and calibration location strengthening arm on the anchor clamps body, be equipped with the tight subassembly that rises in the anchor clamps body, the tight subassembly that rises includes the screw thread pull rod, rises tight cover, uide bushing, reset spring, cylinder mounting panel and slim cylinder, be equipped with the mounting hole that supplies the screw thread pull rod upper end to stretch out on the anchor clamps body, and the screw thread pull rod upper end is equipped with the tight awl piece that rises, the tight cover that rises cup joints in the screw thread pull rod outside, the tight cover that rises locates the mounting hole position, reset spring, cylinder mounting panel and slim cylinder connect gradually at the screw thread pull rod lower extreme, the uide bushing is located the mounting hole terminal, and the uide bushing is located between tight cover and the mounting hole wall, be equipped with the manual control valve of controlling the slim cylinder on the anchor clamps body outer wall.

A front positioning boss is arranged below the reinforcing arm, and a reverse auxiliary positioning boss is arranged on the periphery of the front positioning boss of the clamp body.

The tensioning assemblies in the clamp body are at least two groups.

The cylindrical positioning pin and the diamond pin are respectively arranged at two ends of the clamp body.

The cylindrical positioning pin is provided with at least two positions.

And a clamp base is arranged below the clamp body.

The longitudinal section of the tensioning sleeve is T-shaped, and the tensioning sleeve is provided with a blocking end which can be separated in a limiting way and can be blocked and limited at the opening of the clamp body mounting hole.

The utility model has the advantages that: the utility model provides a special bed of utensil work piece of tight lower pull-down compression type milling machine that rises is convenient for quick clamping and dismantlement, and the clamping in-process does not influence positioning accuracy, can guarantee the symmetry precision of work piece positive and negative processing, and suitable batch part machining is adjustable with raise the efficiency, packing force, and closing device does not damage the surface of processing, and closing device does not influence the feed route of cutter.

Drawings

Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;

FIG. 2 is a schematic view of the enlarged partial structure of the present invention;

fig. 3 is a schematic side view of the present invention.

Detailed Description

As shown in fig. 1-3, the special tensioning and downward-pulling pressing type milling machine fixture comprises a fixture body 1, wherein a reinforcing arm 2, a cylindrical positioning pin 3 and a diamond pin 4 for calibrating and positioning the reinforcing arm 2 are arranged on the fixture body 1, a tensioning assembly is arranged in the fixture body 1, the tensioning assembly comprises a threaded pull rod 5, a tensioning sleeve 6, a guide sleeve 7, a reset spring 8, a cylinder mounting plate 9 and a thin cylinder 10, a mounting hole 11 for extending the upper end of the threaded pull rod 5 is formed in the fixture body 1, a tensioning taper block 12 is arranged at the upper end of the threaded pull rod 5, the tensioning sleeve 6 is sleeved outside the threaded pull rod 5, and the tensioning taper block 12 is in threaded connection with the threaded pull rod 5. The tensioning sleeve 6 is arranged at the position of the mounting hole 11, the reset spring 8, the cylinder mounting plate 9 and the thin cylinder 10 are sequentially connected to the lower end of the threaded pull rod 5, the guide sleeve 7 is arranged at the tail end of the mounting hole 11, the guide sleeve 7 is arranged between the tensioning sleeve 6 and the wall of the mounting hole 11, and the outer wall of the fixture body 1 is provided with a manual control valve 13 for controlling the thin cylinder 10. A front positioning boss 14 is arranged below the reinforcing arm 2, and a back auxiliary positioning boss 15 is arranged on the periphery of the front positioning boss 14 of the clamp body 1.

The operation is as follows in advance: roughly machining a workpiece to ensure the parallelism of the upper surface and the lower surface, and machining a positioning hole and a clamping hole; chamfering the processed hole and deburring; and placing the fixture in a workbench of a numerical control milling machine and aligning.

The working principle of installation and clamping is as follows: the tensioning conical block 12 is screwed outwards from the threaded pull rod 5 so as to prevent the tensioning sleeve 6 from excessively expanding outwards and facilitate smooth penetration from the workpiece clamping hole. And then placing the roughly machined workpiece in a fixture, and aligning the cylindrical positioning pin 3 and the diamond pin 4 to the positioning holes respectively for assembly. Note that the locating holes are vertically aligned with the cylindrical locating pins 3 and the diamond pins 4 during installation to avoid damaging the holes. After the workpiece is installed, the workpiece is lightly pressed at different parts to ensure that the bottom surface of the workpiece is attached to the front positioning boss 14 surface of the clamp. The manual control valve 13 is operated to retract the thin cylinder 10 and drive the threaded pull rod 5 and the tensioning cone block 12 to move downwards. The end face of the tensioning sleeve 6 starts to expand into a conical umbrella-shaped structure under the action of the tensioning cone block 12, and the tensioning sleeve 6 which is expanded into the conical umbrella-shaped structure starts to move downwards along the guide sleeve 7 when the threaded pull rod 5 continues to move downwards, and finally the tensioning sleeve 6 compresses the reinforcing arm 2 and the workpiece. Because the expansion range of the tensioning sleeve 6 is limited, the feeding route of the cutter is not influenced in the machining process of the numerical control machine tool, and the upper surface and the periphery can be machined at one time. After the upper surface of the workpiece is machined, when the workpiece is disassembled, the manual control valve 13 is operated to enable a piston rod of the thin cylinder 10 to extend out, the threaded pull rod 5 and the tensioning cone block 12 move upwards, the tensioning sleeve 6 moves upwards along the guide sleeve 7 under the action of the spring, when the tensioning sleeve 6 moves to the limit position, the operation is stopped, at the moment, the threaded pull rod 5 and the tensioning cone block 12 continue to move upwards, the end face of the tensioning sleeve 6 starts to restore to the initial state, the workpiece can be directly taken out of the clamp, then the workpiece is installed on the back side, and the process is the same as that of front side installation. The mounting surface is supported by a front positioning boss 14 and a back auxiliary positioning boss 15.

At least two groups of components are arranged in the clamp body 1 to play a role in balancing.

The cylindrical positioning pin 3 and the diamond-shaped pin 4 are respectively arranged at two ends of the fixture body 1, and the cylindrical positioning pin 3 is at least provided with two positions. And the positioning is respectively carried out, and the redundant cylindrical positioning pin 3 can further play a role in horizontal auxiliary positioning.

And a clamp base 16 is arranged below the clamp body 1, so that the stability and the balance are enhanced.

The longitudinal section of the tensioning sleeve 6 is T-shaped, and the tensioning sleeve 6 is provided with a blocking end 17 which limits separation and blocks and limits the opening of the mounting hole 11 of the clamp body 1. The guide sleeve 7 is prevented from being separated, so that the threaded pull rod 5 moves smoothly and stably.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for convenience of description, and are not intended to indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and therefore, are not to be considered as limitations of the present invention, and the fundamental principles, main features, and advantages of the present invention have been shown and described above, as would be understood by those skilled in the art.

Claims

1. A tensioning and downward-pulling pressing type special fixture for a milling machine is characterized by comprising a fixture body, wherein a reinforcing arm, a cylindrical positioning pin and a diamond-shaped pin for calibrating and positioning the reinforcing arm are arranged on the fixture body, a tensioning assembly is arranged in the clamp body and comprises a threaded pull rod, a tensioning sleeve, a guide sleeve, a return spring, a cylinder mounting plate and a thin cylinder, a mounting hole for the upper end of the threaded pull rod to extend out is formed in the clamp body, and the upper end of the threaded pull rod is provided with a tensioning taper block, the tensioning sleeve is sleeved outside the threaded pull rod and is arranged at the position of the mounting hole, the reset spring, the cylinder mounting plate and the thin cylinder are sequentially connected at the lower end of the threaded pull rod, the guide sleeve is arranged at the tail end of the mounting hole, and the guide sleeve is arranged between the tensioning sleeve and the wall of the mounting hole, and the outer wall of the fixture body is provided with a manual control valve for controlling the thin cylinder.

2. The tightening and downward-pulling pressing type special fixture for the milling machine as claimed in claim 1, wherein a front positioning boss is provided below the reinforcing arm, and a back auxiliary positioning boss is provided around the front positioning boss of the fixture body.

3. The clamp special for the tension and compression type milling machine as claimed in claim 1 or 2, wherein at least two groups of tension components are arranged in the clamp body.

4. The tightening and downward-pulling pressing type special fixture for the milling machine as claimed in claim 1, wherein the cylindrical positioning pin and the diamond-shaped pin are respectively arranged at two ends of the fixture body.

5. The tightening and downward-pulling pressing type special fixture for the milling machine as claimed in claim 4, wherein the cylindrical positioning pins are provided at least two positions.

6. The special tensioning and downward-pulling compression type milling machine fixture as claimed in claim 1, wherein a fixture base is arranged below the fixture body.

7. The tightening pull-down pressing type special fixture for the milling machine as claimed in claim 1, wherein the tightening sleeve has a T-shaped longitudinal section, and the tightening sleeve has a stopper end which is restricted to be disengaged and stopped at the opening of the fixture body mounting hole.