CN117943856A - Tool machining clamp device and method - Google Patents

Abstract

The invention provides a cutter processing fixture device and a cutter processing fixture method, relates to the field of cutter processing tools, and aims to solve the problem that the processing precision is affected due to insufficient positioning effect and clamping precision in the existing cutter batch processing, a floating pressure head is adopted to adapt to the inclined state of the end face of a cutter, so that end clamping force can be stably applied to the end of the cutter, a floating clamping jaw is adopted to provide clamping allowance, a gap between the jaw and a jaw support can absorb the dimensional deviation of a cutter blank, and an elastic piece is utilized to keep stable transmission of the clamping force, so that the clamping precision and the processing precision are ensured.

Description

Tool machining clamp device and method

Technical Field

The invention relates to the field of tool machining tools, in particular to a tool machining fixture device and a tool machining fixture method.

Background

In the batch processing process of turning tool cutters, the cutters are positioned and clamped through a clamp. Because the traditional multi-station clamping devices are driven by a single clamping device, errors of cylindrical parts can cause the clamping devices to incline or clamp in an unclamped state, so that the problem of insufficient machining precision is generated. Some clamps reworking adopts the V-shaped plate to be used as a bearing part, and the positioning and clamping processes are realized by combining the clamping piece, so that the problem of surface accuracy is not considered although looseness caused by the dimensional deviation of the clamping surface of the milling clamp can be avoided.

In chinese patent application (publication No. CN 110948268A), a multi-station tool bit milling fixture system for intelligently detecting clamping force is disclosed, six degrees of freedom of a workpiece are completely limited and positioned, but the designed end face clamping mechanism is unreasonable, because a certain inclination angle is usually set for facilitating cutting and chip discharging when the front tool face of a tool is designed, and the contact mode of the end face clamping mechanism and the front tool face of the tool in the patent is changed into line contact or even point contact due to the existence of the angle, so that the contact pressure is increased, pits are more easily formed at the contact part, the clamping device is invalid, and the clamping is unreliable; in addition, in the process of machining the cutter, gesture adjustment is often needed, the cutter is generally required to be clamped and limited firstly, the cutter is clamped again after the gesture is adjusted through the turnover device, and due to batch clamping, meanwhile, the sizes of different cutter blanks at the clamping positions deviate, the fluctuation range of the sizes exists, when the batch clamping adopts uniform driving clamping action, the problem that the clamping of part of cutter blanks is unreliable due to the deviation can occur, the clamping force cannot be accurately and stably applied to the cutter blanks, the cutter blanks are easy to deviate in the turnover process, and the follow-up clamping precision and machining precision are affected.

Disclosure of Invention

The invention aims at overcoming the defects in the prior art, and provides a cutter machining clamp device and a cutter machining clamp method, wherein a floating pressure head is adopted to adapt to the inclined state of the end face of a cutter, so that the clamping force of the end part can be stably applied to the end part of the cutter, a floating clamping jaw is adopted to provide clamping allowance, a gap between a claw part and a claw support can absorb the dimensional deviation of a cutter blank, and an elastic piece is utilized to maintain stable transmission of the clamping force, so that the clamping precision and the machining precision are ensured.

A first object of the present invention is to provide a tool machining fixture device, which adopts the following scheme: comprising the following steps:

the positioning assembly is provided with a plurality of bearing parts and a plurality of end face clamping mechanisms matched with the bearing parts, the end face clamping mechanisms are provided with floating pressure heads and floating grooves with circular arc tracks, and the floating pressure heads are in sliding fit with the floating grooves through floating blocks;

The turnover assembly is provided with a rotation mechanism and floating clamping jaws arranged on the rotation mechanism, the floating clamping jaws comprise jaw supports and jaw parts, the jaw parts are arranged on the jaw supports through clearance fit revolute pairs, a clearance for the jaw parts to move is formed between the jaw parts and the jaw supports through elastic pieces, clamping portions are formed between the jaw parts corresponding to the two floating clamping jaws, and the clamping portions correspond to the bearing portions one by one.

Further, one side of the claw support, which faces the claw part, is provided with an opening cavity, one side of the claw part, which faces the cavity, extends out of the ear plate, and a through hole on the ear plate is matched with a pin shaft in the cavity to form the revolute pair.

Further, the floating clamping jaws are arranged in pairs, a plurality of pairs of floating clamping jaws are formed on the slewing mechanism, clamping portions are formed between the two pairs of floating clamping jaws, and one floating clamping jaw of the two pairs of floating clamping jaws is connected to the clamping driving piece.

Further, one end of the elastic piece is abutted against the claw support, the other end of the elastic piece is abutted against the claw portion, and the elastic piece stretches or shortens under the combined action of the claw portion and the claw support to adapt to the gap.

Further, the elastic piece is a torsion spring, and a spring coil of the torsion spring is arranged on the claw support through the fixed shaft.

Further, two floating grooves are arranged, the planes of the two floating grooves corresponding to the circular arc tracks are vertical, and the floating pressure heads are detachably matched with the same floating groove through the floating blocks.

Further, the floating block is arranged on the floating pressure head through the supporting frame, the floating pressure head is rotationally connected with the supporting frame, and the rotation axis is perpendicular to the plane of the circular arc track of the floating groove matched with the floating block.

Further, the support frame is connected with at least two floating pressure heads, and all the floating pressure heads on the support frame are matched with the same floating groove.

A second object of the present invention is to provide a method of operating a tool-holding fixture apparatus as described in the first object, comprising:

The external cutter is placed on the bearing part, and the circumference and one end of the external cutter are positioned;

the floating pressure head of the end surface clamping mechanism contacts the other end of the external cutter and is adapted to the end surface of the external cutter to restrain the external cutter;

The circumferential and axial positioning of the cutters are relieved, the floating clamping jaw on the overturning assembly clamps a plurality of external cutters on the bearing part simultaneously, the clamping position errors of different external cutters are adapted, and the external cutters are clamped to the bearing part again after being separated from the bearing part and overturned.

Further, the floating ram follows the outer cutter end angle adjustment, and the slider slides along the floating groove to cause the floating ram to conform to the outer cutter end abutment position.

Compared with the prior art, the invention has the advantages and positive effects that:

(1) The clamping device aims at solving the problem that the machining precision is affected due to insufficient positioning effect and clamping precision in batch machining of the existing cutter, the floating pressure head is adapted to the inclined state of the end face of the cutter, so that the end clamping force can be stably applied to the end of the cutter, the floating clamping jaw is used for providing clamping allowance, the gap between the claw part and the claw support can absorb the dimensional deviation of a cutter blank, the elastic piece is used for keeping stable transmission of the clamping force, and the clamping precision and the machining precision are guaranteed.

(2) By utilizing clearance fit between the pin shaft and the through hole, the claw part and the claw support can move in a small range along the direction vertical to the clamping surface and the direction parallel to the clamping surface, so that the cutter blank size deviation in the direction vertical to the claw part can be adapted, the claw part can be adapted to the face angle contacting the cutter blank position, and the clamping stability is improved.

(3) The two floating grooves are adopted as the running rails of the floating pressure head, after one floating groove is worn due to long-time use, the other floating groove can be quickly switched, in addition, compared with more rails, the two floating grooves can reduce occupation of crossing positions, central vacancies of the crossing positions are reduced, clamping stagnation and falling-out problems during running of the floating blocks are reduced, and running stability of the floating blocks in the floating grooves is improved.

(4) Compared with the traditional double-rotating-shaft type floating structure, the invention utilizes the single rotating shaft combined with the circular arc track sliding track to adapt to swinging, has higher reliability, is suitable for a cutter processing environment of long-time operation, and is more convenient to adopt the structure of the floating block and the floating groove when the parts are required to be maintained and replaced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

Fig. 1 is a schematic diagram showing the relative positions of the positioning assembly and the flipping assembly according to embodiments 1 and 2 of the present invention.

Fig. 2 is a schematic view of a positioning assembly in embodiments 1 and 2 of the present invention.

Fig. 3 is a schematic view of the carrier and end clamping mechanism in embodiments 1 and 2 of the present invention.

Fig. 4 is a schematic structural view of the flip assembly in embodiments 1 and 2 of the present invention.

Fig. 5 is a structural view of the floating jaw of embodiments 1 and 2 of the present invention.

Fig. 6 is a schematic structural view of an end face clamping mechanism in embodiments 1 and 2 of the present invention.

FIG. 7 is a schematic diagram showing the distribution of floating tanks in examples 1 and 2 of the present invention.

Fig. 8 is a schematic view showing the structure of the floating ram in embodiments 1 and 2 of the present invention.

The device comprises a turnover assembly I, a turnover assembly II, a manipulator, a III-bearing part, an IV-upper clamping mechanism and a V-end surface clamping mechanism;

i-01, a floating clamping jaw, I-02, a connecting rod mechanism, I-03, a sliding rail, I-04, a bracket, I-05, a clamping jaw cylinder, I-06 and a driving clamping jaw;

i-06-01, claw parts, I-06-02, a sealing cover, I-06-03, a pin shaft, I-06-04, a torsion spring, I-06-05 and a claw holder;

V-01, a piston rod, V-02, an end surface cylinder, V-03-01, a floating pressure head, V-03-02, a supporting frame, V-03-03, a floating block, V-03-04, a pin shaft, V-04, a connecting rod, V-05, a pin shaft, V-06-01, a clamping arm, V-06-02 and a floating groove.

Detailed Description

Example 1

In an exemplary embodiment of the present invention, a tool-holding fixture apparatus is provided, as shown in fig. 1-8.

As shown in fig. 1 and 2, the tool processing clamp device mainly comprises a turnover assembly I and a positioning assembly, and a workpiece is taken as an external tool for illustration, wherein the turnover assembly I is connected to the tail end of a manipulator II and is used for clamping and turning the external tool; the positioning component is arranged on the machine tool and used for clamping and positioning an external cutter; the manipulator II carrying the turnover assembly I is positioned on one side of the machine tool.

As shown in fig. 3, the positioning assembly includes a bearing part III, an upper clamping mechanism IV and an end surface clamping mechanism V, the end surface clamping mechanism V is connected to one side of the bearing part III, and the upper clamping mechanism IV is connected to the other side of the bearing part III.

Fig. 2 shows the co-operating structure of the carrier part III, the upper clamping mechanism IV and the end surface clamping mechanism V. The bearing part III is a basic structure of the whole positioning assembly and is responsible for supporting and fixing an external cutter to be processed, and is provided with a bearing groove so as to adapt to the shape and the size of the external cutter; in use, the external cutter is placed in a predetermined position on the carrier part III, and is fixed and positioned by the co-action of the other clamping mechanisms. The upper clamping mechanism IV can clamp the external cutter from the upper part and the side part, ensures the stability and positioning precision of the external cutter in the vertical direction and the horizontal direction, comprises a movable clamping arm and a driving mechanism, and controls the opening and closing of the clamping arm through the driving mechanism so as to clamp and release the external cutter; when the external cutter is placed on the bearing part III, the clamping arm of the upper clamping mechanism IV moves downwards and sideways under the action of the driving mechanism, the upper part and the side part of the external cutter are clamped, and the external cutter is fixed.

For the corresponding end face position of the front cutter face of the external cutter, as the front cutter face has a certain inclination angle, the end face clamping mechanism V is used for clamping the end face of the external cutter, so that the stability and the positioning precision of the external cutter in the other direction of the horizontal direction are ensured, and the external cutter is matched with the upper clamping mechanism IV and the bearing part, so that the accurate positioning of the external cutter in space is commonly ensured.

The positioning assembly realizes accurate and stable positioning of the external cutter through the synergistic effect of the bearing part III, the upper clamping mechanism IV and the end surface clamping mechanism V, thereby not only ensuring the positioning accuracy, but also improving the processing efficiency and stability of the external cutter.

For the batch processing of corresponding external cutters, the positioning assembly is provided with a plurality of bearing parts III and a plurality of end face clamping mechanisms V matched with the bearing parts III, and simultaneously clamps and positions the external cutters, so that the problem that the clamping effect is unreliable due to the fact that the inclined angle exists on the front cutter face is solved, the end face clamping mechanism V is provided with a floating pressure head V-03-01 and a floating groove V-06-02 with a circular arc track, the floating pressure head V-03-01 is matched with the floating groove V-06-02 in a sliding mode through a floating block, the inclined state of the cutter end face is adapted to the floating pressure head V-03-01, and therefore the end clamping force can be stably applied to the cutter end.

The floating pressure head V-03-01 is in sliding fit with the floating groove V-06-02 through the floating pressure head V-03-01, so that the end surface clamping mechanism V can flexibly adapt to the inclined state of the end surface of the cutter, the problem of unreliable clamping caused by the inclination of the end surface of the cutter is solved, the end clamping force can be uniformly and stably applied to the end part of the cutter, the non-uniform clamping force caused by the inclination is avoided, and the vibration and displacement of the cutter in the machining process are reduced. At the same time, wear and damage of the tool during machining can be reduced by a stable and uniform clamping force. Is beneficial to prolonging the service life of the cutter and reducing the production cost.

In addition, the movement between the floating pressure head V-03-01 and the floating groove V-06-02 is subject to the abutting action of the end face of the external cutter, so that the passive self-adaptive adjustment is realized, the adjustment and maintenance of the end face clamping mechanism V are simpler and more convenient, cutters with different inclination angles can be adapted, and the flexibility and convenience of operation are improved.

As shown in fig. 6, the end surface clamping mechanism V comprises a clamping arm V-06-01, a floating pressure head V-03-01, an end surface cylinder V-02 and other components, the end part of a piston rod V-01 of the end surface cylinder V-02 is connected with one end of the clamping arm V-06-01, the clamping arm V-06-01 is connected with the end surface cylinder V-02 through a connecting rod V-04, and the connecting rod V-04 is hinged with the end surface cylinder V-02, the clamping arm V-06-01 and the piston rod V-01 are hinged with the clamping arm V-06-01 through a pin shaft V-05; the other end of the clamping arm V-06-01 is connected with a floating pressure head V-03-01 through a floating structure. The piston rod V-01 of the end surface cylinder V-02 stretches and contracts to change the swinging angle of the clamping arm V-06-01, so that the clamping or loosening of the end surface of the external cutter is realized.

The surface of one side of the floating pressure head V-03-01 is a working surface and is used for clamping an external cutter, and the surface of the other side is a matching surface and is used for matching with the clamping arm V-06-01 to form a floating structure; the mating surface is hemispherical. FIG. 7 shows the distribution structure of the floating grooves V-06-02, wherein two floating grooves V-06-02 are arranged, the planes of the corresponding circular arc tracks of the two floating grooves V-06-02 are vertical, and the floating pressure heads V-03-01 are detachably matched with the same floating groove V-06-02 through the floating blocks V-03-03.

As shown in fig. 7 and 8, the floating structure comprises a supporting frame V-03-02, a floating groove V-06-02 and a floating block V-03-03, wherein the supporting frame V-03-02 is arranged on the outer side of a matching surface of the floating pressure head V-03-01, and the shape of the supporting frame V-03-02 is matched with the matching surface; the support block is connected with the floating pressure head V-03-01 through a pin shaft V-03-04, the pin shaft V-03-04 is in clearance fit with the floating pressure head V-03-01, and the pin shaft V-03-04 is in interference fit with the support frame V-03-02, so that the floating pressure head V-03-01 can realize Z-axis rotary motion.

The outside of the supporting frame V-03-02 is fixed with a floating block V-03-03, and one side of the clamping arm V-06-01 corresponding to the floating pressure head V-03-01 is provided with a floating groove V-06-02; in this embodiment, two sliders V-03-03 are provided and are symmetrically disposed with respect to the center axis of the support block; two groups of floating grooves V-06-02 are arranged, each group of floating grooves V-06-02 is provided with two floating grooves, one group of floating grooves V-06-02 is arranged along the transverse direction, and the other group of floating grooves V-06-02 is arranged along the longitudinal direction, so that the two groups of floating grooves V-06-02 form a cross structure. The two floating blocks V-03-03 are matched with one group of floating grooves V-06-02, so that the floating pressure head V-03-01 can realize X-direction rotation motion. When the floating groove V-06-02 cannot work due to repeated clamping, the floating groove V-06-02 does not need to be replaced, and the two floating blocks V-03-03 and the other group of floating grooves V-06-02 can be matched to finish subsequent processing without affecting the processing beat.

The support frame V-03-02 of the embodiment is matched with the floating pressure head V-03-01 through the pin shaft V-03-04, and meanwhile, the support block is matched with the floating groove V-06-02 arranged on the clamping arm V-06-01 through the floating block V-03-03, so that the support block can realize X-axis rotary motion and Z-axis rotary motion, and the floating clamping function is realized. When the external cutter completes the previous working procedure, the working procedure is changed, and the external cutter is turned over, so that the inclination angle of the end face and the external cutter is changed, and the floating clamping is suitable for the working condition.

Because the external cutter is required to mill a plurality of surfaces and has a plurality of working procedures, the external cutter in different working procedures is required to be turned over and the clamp is required to be replaced, so that the machining efficiency is affected; therefore, the embodiment is provided with the overturning assembly I, and the overturning assembly I can realize overturning of multiple workpieces and is provided with a slewing mechanism and a floating clamping jaw I-01 arranged on the slewing mechanism. As shown in fig. 4, the turning component I is provided with a plurality of pairs of floating clamping jaws I-01 which are arranged side by side, one pair of floating clamping jaws I-01 is used as a driving clamping jaw I-06, the other floating clamping jaws I-01 are used as driven clamping jaws, and the external cutter is turned over quickly between working procedures through the cooperation of the plurality of pairs of floating clamping jaws I-01.

The driving clamping jaw I-06 is connected with the clamping jaw air cylinder I-05, the driving clamping jaw I-06 and the adjacent driven floating clamping jaw I-01 are connected through the connecting rod mechanism I-02, so that synchronous movement of the driven floating clamping jaw I-01 and the driving clamping jaw I-06 is realized, namely, one clamping jaw air cylinder I-05 drives a plurality of pairs of floating clamping jaws I-01 to move, the structure can be simplified, and the structure is compact. Each floating clamping jaw I-01 is matched with a sliding rail I-03 through a sliding block, the sliding rail I-03 is arranged on one side of a support I-04, the other side of the support I-04 is connected with a manipulator II, and when the previous working procedure is finished, a driving clamping jaw I-06 drives a driven floating clamping jaw I-01 to clamp a workpiece to take the workpiece and the workpiece is turned over by a steering engine of the manipulator II.

Most of existing multi-station overturning tools are provided with single air cylinders as driving parts, clamps are connected together by virtue of mechanical transmission, however, facing cutter blanks, machining allowance and machining error in the side clamping direction are larger, a plurality of clamping devices are connected together in a serial mode and can be influenced by the machining error and allowance in the cutter blanks to ensure that the rest cutter blanks are not clamped tightly or are unreliable, on the basis that the floating clamping jaw I-01 comprises a jaw support I-06-05 and a jaw I-06-01, the jaw I-06-01 is mounted on the jaw support I-06-05 through a clearance fit rotating pair, a clearance for the jaw I-06-01 to move is formed between the jaw I-06-01 and the jaw support I-06-05 by arranging an elastic part, and clamping parts are formed between the jaw I-06-01 corresponding to the two floating clamping jaws I-01 and the bearing part III in a one-to one correspondence.

The turnover assembly I adopts a floating clamping jaw I-01, the claw I-06-01 and the claw support I-06-05 are connected in a rotating way through a revolute pair, the revolute pair can adopt a pin hole matching structure formed by combining a pin shaft I-06-03 and a through hole, the pin shaft I-06-03 and the through hole are in clearance fit, when the relative position of the pin shaft I-06-03 and the axis of the through hole changes, the relative position of the claw I-06-01 and the claw support I-06-05 also changes, the surface of the claw I-06-01, which contacts a workpiece, is defined as a clamping surface, the axis of the pin shaft I-06-03 and the axis of the through hole are parallel to the clamping surface, and the small range of movement along the direction perpendicular to the clamping surface and the direction parallel to the clamping surface can be formed between the claw I-06-01 and the claw support I-06-05 by utilizing the clearance fit between the pin shaft I-06-03 and the through hole.

For movement in the direction perpendicular to the clamping face, the forward movement of the jaw portion I-06-01 in this direction brings the jaw portion I-06-01 into contact with the jaw rest I-06-05, abutment between the jaw portion I-06-01 and the jaw rest I-06-05 forming a gapless state, rotation of the jaw portion I-06-01 about the axis of the pin I-06-03 being restricted as a fixed rigid clamp; conversely, when the claw portion I-06-01 moves reversely in the direction so that the claw portion I-06-01 is gradually far away from the claw support I-06-05, a gap is formed between the claw support I-06-05 and the claw portion I-06-01, the maximum gap state occurs when the outer wall of the pin shaft I-06-03 and the inner wall of the through hole form an inscription, under the gap state, the claw portion I-06-01 can rotate around the axis of the pin shaft I-06-03, the inclination state of the clamping surface is adjusted through the transmission, and the rotation process is generated through the acting force on the clamping surface when an external workpiece contacts the clamping surface.

In the working condition that the claw support I-06-05 and the claw part I-06-01 form a gap, the size of the gap also determines the rotation range of the claw part I-06-01 relative to the claw support I-06-05, and the larger the gap is, the larger the rotation range of the claw part I-06-01 is, until one or more positions of the claw part I-06-01 are contacted with the claw support I-06-05, the continuous rotation of the claw part I-06-01 is blocked, and the rotation position of the claw support I-06-05 is also restrained. When the claw part I-06-01 rotates around the axis of the pin shaft I-06-03 to a first direction, a first state that the claw part I-06-01 is blocked to stop rotating can be formed respectively, when the claw part I-06-01 rotates around the axis of the pin shaft I-06-03 to a second direction, a second state that the claw part I-06-01 is blocked to stop rotating can be formed respectively, and on the premise of the same clearance, the rotation adjusting range from the position of the first state to the position of the second state is the rotation adjusting range of the claw part I-06-01. The range can be adjusted according to the deviation of the surface roughness of the clamped workpiece, the adjustment process can be realized by changing the clearance value of clearance fit of the shaft hole, and the adjustment process can also be realized by presetting the clearance between the claw support I-06-05 and the claw part I-06-01.

It should be noted that, when the floating jaw I-01 works, the clamping surface of the jaw I-06-01 contacts the workpiece and is stressed, the stress is in a direction that makes the gap between the jaw support I-06-05 and the jaw I-06-01 narrow, in order to adapt to the process, a gap needs to be reserved between the jaw support I-06-05 and the jaw I-06-01 in an initial state before the clamping work is performed, meanwhile, the clamping force of the buoy jaw to the workpiece needs to be transferred from the jaw support I-06-05 to the jaw I-06-01 and then applied to the workpiece, and reliable clamping force transfer cannot be formed under the non-abutting state of the jaw support I-06-05 and the jaw I-06-01. In this embodiment, an elastic member is provided between the claw portions I-06-05 and I-06-01, one end of the elastic member abuts against the claw portion I-06-05, the other end of the elastic member abuts against the claw portion I-06-01, and the elastic member is stretched or shortened by the combined action of the claw portion I-06-01 and the claw portion I-06-05, and the gap is formed. When the claw support I-06-05 and the claw part I-06-01 are in a non-abutting floating state, the clamping force received by the claw support I-06-05 can be transmitted to the claw part I-06-01, so that the claw support I-06-05 is applied to a workpiece, and the clamping action is completed.

The elastic piece is arranged between the claw support I-06-05 and the claw part I-06-01, and the elastic piece can be a spring, a torsion spring I-06-04, a pressure spring and the like, or can be a rubber element such as a rubber spring and the like. When the spring is adopted, the spring is arranged in a cavity of the claw support I-06-05, one end of the spring is abutted against the claw I-06-01, the other end is abutted against the claw support I-06-05, a gap is formed between the claw support I-06-05 and the claw I-06-01 (the pin shaft I-06-03 and the through hole position are not considered), when the claw I-06-01 contacts an external workpiece for clamping, if the required clamping force is smaller than the elastic force of the spring under the length, the position between the claw I-06-01 and the claw support I-06-05 is kept unchanged, and if the required clamping force is larger than the elastic force of the spring under the length, the gap between the claw I-06-01 and the claw support I-06-05 is gradually reduced, so that the resilience force of the spring is equal to or larger than the required clamping force until the claw I-06-01 is abutted against the claw support I-06-05, and the claw support I-06-05 directly transmits the clamping force to the claw I-06-05, and the clamping force requirement is met.

Similarly, when the torsion spring I-06-04 is adopted, an end fixing piece at one end of the torsion spring I-06-04 is fixed on the claw support I-06-05, an end fixing piece at the other end of the torsion spring I-06-04 is abutted against the claw part I-06-01, a gap is formed between the claw support I-06-05 and the claw part I-06-01 by utilizing elasticity, and the gap is adjusted under the clamping action.

As shown in FIG. 5, a cavity is arranged on one side of the claw support I-06-05 facing and approaching to the claw part I-06-01, the side surface of the cavity is blocked by a sealing cover I-06-02, an opening is reserved on one side of the cavity facing to the claw part I-06-01, an ear plate extending into the cavity is arranged on one side of the claw part I-06-01, a through hole forming a revolute pair is formed in the ear plate, a pin shaft I-06-03 forming the revolute pair is arranged in the cavity, and clearance fit is formed between the pin shaft I-06-03 and the through hole on the ear plate.

The elastic piece is positioned between the claw support I-06-05 and the claw part I-06-01, after the cavity is arranged on the claw support I-06-05, the main body part of the elastic piece is positioned in the cavity, and the acting end extends out of the cavity through the opening of the cavity, so that the claw part I-06-01 is contacted to realize force transmission. Taking torsion spring I-06-04 as an example, the coil part of torsion spring I-06-04 is arranged in the cavity through a fixed pin, and an end fixing piece at one end of torsion spring I-06-04 passes through the opening of the cavity and then contacts claw part I-06-01, so that force transmission is realized. The fixing pin can be fixed on the sealing cover I-06-02 or on the corresponding supporting claw of the inner wall of the cavity. When the spring is adopted, one end of the spring can be fixed on the inner wall of the cavity in order to avoid uncontrollable deflection of the spring, the other end of the spring passes through the opening and then is fixed on the claw part I-06-01, the force transmission is realized by utilizing the elastic force of the spring in the axial direction of the spring, and meanwhile, the action deviating from the axial direction of the spring is adapted by utilizing the deformation of the spring body, so that the transmission of the clamping force by the spring is maintained.

It can be understood from fig. 5 that the elastic member is used for forming a movement range in which the claw portion I-06-01 can move relative to the claw support I-06-05, and after the claw portion I-06-01 contacts the external workpiece, the claw portion I-06-01 can adaptively rotate under the reaction force of the external workpiece to realize adjustment, and meanwhile, the clearance fit can also provide a movement range in a direction perpendicular to the clamping surface, so that different clamping error amounts of a plurality of clamping stations corresponding to a plurality of external workpieces can be adapted.

Example 2

In another exemplary embodiment of the present invention, as shown in fig. 1-8, a method of operating a tool-holding fixture apparatus is provided.

Using the tool machining fixture device as in example 1, comprising the steps of:

The external cutter is placed on the bearing part, and the circumference and one end of the external cutter are positioned;

The floating pressure head V-03-01 of the end surface clamping mechanism contacts the other end of the external cutter and is suitable for the end surface of the external cutter to restrain the external cutter;

And the circumferential and axial positioning of the cutters are relieved, the floating clamping jaw I-01 on the overturning assembly clamps a plurality of external cutters on the bearing part at the same time, the clamping position errors of different external cutters are adapted, and the external cutters are clamped to the bearing part after being separated from the bearing part and overturned.

The floating ram V-03-01 follows the outer cutter end angle adjustment, and the floating block V-03-03 slides along the floating groove V-06-02 to enable the floating ram V-03-01 to be attached to the outer cutter end abutting position.

Detailed descriptionof positioning, clamping, flipping, and re-clamping of an external tool in a positioning assembly

Initial positioning: the external cutter is placed on the carrier part III. In the process, the circumference (i.e., the direction around its axis) and one end of the tool have been initially positioned.

End face clamping: the floating ram V-03-01 of the end face clamping mechanism V contacts the other end of the external cutter. The structure of the floating ram V-03-01 allows it to be adaptively adjusted according to the inclination state of the tool end face. When the floating ram V-03-01 contacts the end face of the tool, it slides in the floating groove V-06-02 through the floating block V-03-03 to ensure a tight abutment against the end of the tool.

Circumferential and axial positioning release: after the cutter is stably clamped by the end surface clamping mechanism, the circumferential and axial positioning of the cutter is relieved originally in the overturning operation, so that the cutter can move freely without limitation in the overturning process.

Turning over a cutter: the overturning assembly I is interposed, the floating clamping jaw I-01 on the overturning assembly I clamps a plurality of external cutters on the bearing part at the same time, the floating clamping jaw I-01 adapts to clamping position errors of different cutters, and each cutter can be firmly clamped. The entire flipping assembly is then flipped along with the clamped tool to effect the transfer of the tool from the home position to the new position.

And (5) re-clamping: after the overturning is completed, the floating clamping jaw I-01 releases the cutter, and the cutter is placed on the bearing part III again. In the process, the floating pressure head V-03-01 contacts the other end of the cutter again, and the sliding block slides in the floating groove, so that the floating pressure head V-03-01 can be tightly attached to the end of the cutter at a new position. Then, the end face clamping mechanism clamps the cutter again, and the whole re-clamping process is completed.

The self-adaptive capacity of the floating pressure head V-03-01 and the floating clamping jaw I-01 can be automatically adjusted according to the actual position and shape of the cutter, so that the stability and accuracy of the cutter in the whole process are ensured.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A tool machining fixture apparatus, comprising:

the positioning assembly is provided with a plurality of bearing parts and a plurality of end face clamping mechanisms matched with the bearing parts, the end face clamping mechanisms are provided with floating pressure heads and floating grooves with circular arc tracks, and the floating pressure heads are in sliding fit with the floating grooves through floating blocks;

The turnover assembly is provided with a rotation mechanism and floating clamping jaws arranged on the rotation mechanism, the floating clamping jaws comprise jaw supports and jaw parts, the jaw parts are arranged on the jaw supports through clearance fit revolute pairs, a clearance for the jaw parts to move is formed between the jaw parts and the jaw supports through elastic pieces, clamping portions are formed between the jaw parts corresponding to the two floating clamping jaws, and the clamping portions correspond to the bearing portions one by one.

2. The tool machining fixture device of claim 1, wherein the side of the jaw support facing the jaw portion is provided with an open cavity, the side of the jaw portion facing the cavity is extended out of the ear plate, and the through hole on the ear plate is matched with the pin shaft in the cavity to form the revolute pair.

3. The tool machining fixture device of claim 2, wherein the floating jaws are arranged in pairs, the swivel mechanism defining a plurality of pairs of floating jaws, a clamping portion being defined between the pairs of floating jaws, one of the pairs of floating jaws being connected to the clamping drive.

4. The tool processing clamp device of claim 1, wherein one end of the elastic member is abutted against the claw holder, and the other end is abutted against the claw portion, and the elastic member is lengthened or shortened by the combined action of the claw portion and the claw holder to accommodate the gap.

5. The tool processing clamp device of claim 4, wherein the elastic member is a torsion spring, and a coil of the torsion spring is mounted to the claw holder through a fixed shaft.

6. The tool processing clamp device according to claim 1, wherein the number of the floating grooves is two, the planes of the two floating grooves corresponding to the circular arc tracks are perpendicular, and the floating pressure heads are detachably matched with the same floating groove through the floating blocks.

7. The tool processing clamp device of claim 6, wherein the slider is mounted to the floating ram by a support bracket, the floating ram is rotatably coupled to the support bracket, and the axis of rotation is perpendicular to the plane of the circular arc track of the floating groove in which the slider is engaged.

8. The tool processing clamp device of claim 7, wherein at least two floating rams are connected to the support frame, and all of the floating rams on the support frame are mated to the same floating channel.

9. A method of operating a tool processing clamp apparatus according to any one of claims 1 to 8, comprising:

The external cutter is placed on the bearing part, and the circumference and one end of the external cutter are positioned;

the floating pressure head of the end surface clamping mechanism contacts the other end of the external cutter and is adapted to the end surface of the external cutter to restrain the external cutter;

The circumferential and axial positioning of the cutters are relieved, the floating clamping jaw on the overturning assembly clamps a plurality of external cutters on the bearing part simultaneously, the clamping position errors of different external cutters are adapted, and the external cutters are clamped to the bearing part again after being separated from the bearing part and overturned.

10. The method of operating a tool machining fixture device of claim 9 wherein the floating ram follows the outer tool end angle adjustment and the slider slides along the floating slot to cause the floating ram to engage the outer tool end abutment position.