CN213438500U

CN213438500U - Heavy cutter fixture

Info

Publication number: CN213438500U
Application number: CN202022275871.8U
Authority: CN
Inventors: 魏连鑫; 丁伟明; 周吉贞; 孙造; 王盟; 郭雨欣; 唐倩; 李金凤; 王强
Original assignee: General Technology Group Dalian Machine Tool Co ltd
Current assignee: General Technology Group Dalian Machine Tool Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-06-15
Anticipated expiration: 2030-10-14

Abstract

The utility model discloses a heavy cutter fixture, its characterized in that: fixture include fixing base (3) of constituteing by interconnect's bottom plate (1) and clamp plate (2), be provided with base (4) on fixing base (3), sliding connection has lock arbor (5) in base (4), is provided with ejecting spring (6) in the below of lock arbor (5), and the top of locking arbor (5) is provided with trigger shaft (7) simultaneously, the external diameter of trigger shaft (7) is less than the external diameter of lock arbor (5), the top of base (4) is detained to a part of clamp plate (2), and trigger shaft (7) then the activity is worn to connect in opening the via hole of locating on clamp plate (2).

Description

Heavy cutter fixture

Technical Field

The utility model relates to a supporting mechanism, especially a heavy cutter fixture are used to tool magazine.

Background

With the rapid development of the mechanical industry, the market demands heavy milling machine tools are increasing. The stability and the high efficiency are important parameters of medium and large-sized machine tools, how to accelerate the milling efficiency, enlarge the milling area and reduce the tool changing time is an important link which needs to be considered seriously in the design of machine tools and accessories in future. Wherein, the increase of the weight is inevitable when the diameter of the cutter is increased. The traditional cutter clamping mechanism is thin in structure and completely provides clamping force by elastic deformation of materials or pure elastic force of a spring. Most of the methods are used for clamping vertical tools, the clamping force is low, and if the methods are used for clamping horizontal tools, the methods can only be used for light tools, and the phenomenon of tool falling which occurs frequently cannot be avoided. Nowadays, the types of horizontal heavy machine tools are more and more, and cutters are heavier and heavier, so that a safe and reliable cutter clamping mechanism which can be applied to heavy cutter clamping is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve the above-mentioned not enough that prior art exists, provide a simple structure, design benefit, rationally distributed, applicable in heavy cutter centre gripping and still can guarantee safe and reliable's cutter fixture.

The technical solution of the utility model is that: the utility model provides a heavy cutter fixture which characterized in that: the clamping mechanism comprises a fixed seat 3 consisting of a bottom plate 1 and a pressing plate 2 which are connected with each other, a base 4 is arranged on the fixed seat 3, a cutter locking shaft 5 is connected in the base 4 in a sliding way, an ejection spring 6 is arranged below the cutter locking shaft 5, a trigger shaft 7 is arranged at the top end of the cutter locking shaft 5, the outer diameter of the trigger shaft 7 is smaller than that of the cutter locking shaft 5, one part of the pressing plate 2 is buckled above the base 4, and the trigger shaft 7 is movably penetrated in a through hole formed in the pressing plate 2,

the fixed seat 3 is rotatably connected with a tool holder 9 through a rotating shaft 8, one end of the tool holder 9 is provided with a positioning shaft head 10, a tool holder spring 11 is sleeved on the positioning shaft head 10, the tool holder spring 11 is positioned in a spring cavity arranged in the fixed seat 3, the other end of the tool holder 9 is provided with a clamping end 12 matched with a tool holder positioning groove, the fixed seat 3 is also provided with a positioning key 13 matched with a tool holder key groove,

the tool holder 9 is further provided with a top rod groove, a top rod 14 penetrates through the top rod groove, a top screw 15 capable of contacting with the top rod 14 is connected to the top end face of the tool holder 9 in a threaded mode, the end portion of the top rod 14 is hemispherical, the hemispherical end portion can penetrate through a through hole formed in the side wall of the fixing base 3 to enter an inner cavity of the base 4, and an inclined face matched with the hemispherical end portion is arranged on the outer wall of the locking cutter shaft 5.

Compared with the prior art, the utility model, have following advantage:

the heavy tool clamping mechanism with the structure is simple in structure, ingenious in design and reasonable in layout, and a special structure is designed for solving the problems existing in the working process of the traditional tool clamping mechanism. The contact between the ejector rod and the cutter locking shaft (inclined plane), which is a key component of the mechanical cutter locking, is a mutual grinding process, the matching precision between the ejector rod and the cutter locking shaft (inclined plane) is improved after the mechanical cutter locking device is used for a period of time, and the clamping of a heavy cutter is facilitated due to the higher matching precision. The structure of the manipulator is simplified, the clamping reliability is improved, the maximum load is not determined by the structure of the clamping mechanism any more, but by the compressive strength between the ejector rod and the cutter locking shaft, and therefore the maximum load can easily reach more than 100 kg. Therefore, the method has multiple advantages, is particularly suitable for popularization and application in the field, and has very wide market prospect.

Drawings

Fig. 1 is a top view of an embodiment of the present invention.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

Detailed Description

The following description will explain embodiments of the present invention with reference to the drawings. As shown in fig. 1 and 2: a heavy-duty cutter clamping mechanism comprises a fixed seat 3 consisting of a bottom plate 1 and a pressing plate 2 which are connected with each other, a base 4 is arranged on the fixed seat 3, a cutter locking shaft 5 is connected in the base 4 in a sliding way, an ejection spring 6 is arranged below the cutter locking shaft 5, a trigger shaft 7 is arranged at the top end of the cutter locking shaft 5, the outer diameter of the trigger shaft 7 is smaller than that of the cutter locking shaft 5, one part of the pressing plate 2 is buckled above the base 4, the trigger shaft 7 is movably penetrated in a through hole arranged on the pressing plate 2,

The utility model discloses heavy cutter fixture's working process as follows: in an initial state (when the tool is not clamped), under the action of the tool holder spring 11, one end of the tool rest 9, which is in contact with the tool holder spring 11, is pushed outwards, and the end, where the clamping end 12 is located, is retracted inwards to wait for clamping;

when a tool is required to be clamped, the main shaft carries the tool and moves inwards from an opening of the tool holder 9 (namely one side of the clamping end 12), meanwhile, the main shaft of the machine tool moves downwards, a top block arranged at the end part of the main shaft can be contacted with a trigger shaft 7 protruding out of the outer side of the pressing plate 2 to drive the trigger shaft 7 to move downwards, the tool holder 9 is completely opened at the moment, after the tool reaches a clamping position, the main shaft loosens the tool and moves upwards, the tool locking shaft 5 losing pressure can move upwards under the action of an ejection spring 6 below the tool locking shaft, and the end part of the ejector rod 14 abuts against an inclined plane arranged on the side wall of the tool locking shaft 5, so that when the tool locking shaft 5 moves upwards, the ejector rod 14 is pushed to move outwards, finally the tool holder 9 is driven to swing anticlockwise, the feeding stub 12 at the end; in the clamping state, the end part of the ejector rod 14 is contacted with the side wall of the non-inclined surface part of the cutter locking shaft 5, and in the state, unless the cutter locking shaft 5 moves downwards (the ejector rod 14 is contacted with the inclined surface again), the ejector rod 14 cannot move towards the inside of the base 4, so that mechanical locking is realized;

in the working process, the distance that the hemispherical end of the ejector rod 14 protrudes out of the tool holder 9 can be adjusted according to the actual situation, and the ejector rod 14 and the tool holder 9 are locked by using the jackscrew 15 after adjustment;

the tool holder 9, the tool locking shaft 5 and the ejector rod 14 are all made of 45 materials, and the surface heat treatment process is carried out, so that the tool has the characteristics of wear resistance, fatigue resistance and the like, and the service life of the manipulator is ensured.

Claims

1. The utility model provides a heavy cutter fixture which characterized in that: the clamping mechanism comprises a fixed seat (3) consisting of a bottom plate (1) and a pressing plate (2) which are connected with each other, a base (4) is arranged on the fixed seat (3), a lock cutter shaft (5) is connected in the base (4) in a sliding way, an ejection spring (6) is arranged below the lock cutter shaft (5), a trigger shaft (7) is arranged at the top end of the lock cutter shaft (5), the outer diameter of the trigger shaft (7) is smaller than that of the lock cutter shaft (5), one part of the pressing plate (2) is buckled above the base (4), and the trigger shaft (7) is movably penetrated in a through hole formed in the pressing plate (2),

the tool holder is characterized in that the fixed seat (3) is rotatably connected with a tool holder (9) through a rotating shaft (8), one end of the tool holder (9) is provided with a positioning shaft head (10), the positioning shaft head (10) is sleeved with a tool holder spring (11), the tool holder spring (11) is positioned in a spring cavity arranged in the fixed seat (3), the other end of the tool holder (9) is provided with a clamping end head (12) matched with a tool holder positioning groove, the fixed seat (3) is also provided with a positioning key (13) matched with a tool holder key groove,

the tool holder is characterized in that a top rod groove is further formed in the tool holder (9), a top rod (14) penetrates through the top rod groove, a top screw (15) capable of being in contact with the top rod (14) is in threaded connection with the top end face of the tool holder (9), the end portion of the top rod (14) is hemispherical, the hemispherical end portion can penetrate through a through hole formed in the side wall of the fixing base (3) to enter an inner cavity of the base (4), and an inclined face matched with the hemispherical end portion is arranged on the outer wall of the locking cutter shaft (5).