CN109352377B

CN109352377B - Clamp with controllable clamping force for machining

Info

Publication number: CN109352377B
Application number: CN201811459141.4A
Authority: CN
Inventors: 田长江; 白冉; 马博; 黄卫; 刘维桢
Original assignee: Jiangsu Tian Long Long Corrosion Protection Equipment Co Ltd
Current assignee: Jiangsu Tianfulong Anti Corrosion Equipment Co ltd
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2020-03-24
Anticipated expiration: 2038-11-30
Also published as: CN109352377A

Abstract

The clamping force controllable clamp for machining well realizes positioning and pressing of a workpiece, can well control pressing force of the workpiece, avoids damage to the workpiece, and has the effect of improving machining efficiency for mass production; the technical scheme includes that the device comprises a foundation plate, guide plates are arranged above the foundation plate, a sliding block is arranged between the two guide plates, a screw rod is inserted into the left side wall of the sliding block, a disc is mounted on the screw rod, an ejector rod is inserted into the sliding block, a spring is connected between the left end of the disc and the bottom wall of the blind hole, in an initial state, the disc is located at the leftmost side of the blind hole under the action of the spring, wedge-shaped grooves which are arranged at the right side of the screw rod and are uniformly distributed on the circumference are formed in the outer edge of the ejector rod, clamping blocks which are uniformly distributed on the circumference and can radially stretch are arranged on the inner wall of the part where the screw rod is matched with the ejector rod, when the screw rod moves rightwards relative to the ejector rod, the clamping; the invention has novel conception.

Description

Clamp with controllable clamping force for machining

Technical Field

The invention relates to the technical field of machining clamps, in particular to a clamping force controllable machining clamp.

Background

Aluminum profiles are increasingly used in industry, and when processing profiles, the dimensions of the profiles have large differences due to the use occasions and design requirements, and the profiles need to be clamped during processing to keep the profiles stable in position and then processed.

In current equipment, comparatively commonly used be for setting up the bench vice on the workstation, or use cylinder anchor clamps to carry out the centre gripping, then process the work piece, when using the bench vice, the clamping is more when using, and when using the cylinder to fix, needs to last the air feed and keeps the stability of cylinder, can cause the waste of resource like this, and uses the cylinder in the workshop to have great noise, so need design the anchor clamps that can the fixed aluminium section bar of rapid stabilization.

In addition, because the material of aluminium alloy is softer, when fixing a position the work piece, improve the area of contact of application of force face and work piece surface, it can effectual assurance aluminium product compress tightly the effect to make pressure apply perpendicularly on the work piece surface simultaneously, in addition, when the packing force is great, can cause certain damage to the surface of aluminium product work piece, consequently it is very necessary to design an anchor clamps that adjust conveniently, adaptable multiple work piece, and the device that can effectual control the size of clamp force again simultaneously.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the processing clamp with controllable clamping force, which well realizes the positioning and the pressing of the workpiece, can well control the pressing force of the workpiece, avoids the damage to the workpiece and has the effect of improving the processing efficiency for mass production.

The technical scheme includes that the device comprises a horizontally placed foundation plate, two vertical guide plates which are arranged in parallel front and back are arranged above the foundation plate, a sliding block which can move up and down along the guide plates is arranged between the two guide plates, the cross section of the sliding block is in a shape like a Chinese character 'hui', a screw rod is inserted into the left side wall of the sliding block, the screw rod is in threaded connection with the sliding block, a blind hole is formed in the right end of the screw rod, a disc which can slide left and right in the blind hole is installed in the blind hole and can not be separated from the blind hole, an ejector rod which can slide left and right along the sliding block but can not rotate is inserted into the right side wall of the sliding block, the left end of the ejector rod is inserted into the blind hole and is fixedly connected with the disc, a spring is connected between the left end of the disc and the bottom wall of the blind hole, the disc is positioned at the rightmost side of the blind hole under the action of the spring, when the screw rod moves rightwards relative to the ejector rod, the clamping block can be clamped into the wedge-shaped groove, the clamping block is clamped into the wedge-shaped groove, so that the screw rod can only rotate in a single direction, and the screw rod can only move leftwards due to the single-direction rotation of the screw rod;

the right end of the screw is provided with a hemispherical ball head body, a pressing block is sleeved on the ball head body, a hemispherical groove matched with the ball body is arranged at the sleeved position of the pressing block and the ball head body, and the spherical radius of the hemispherical groove is larger than that of the ball head body, so that a structure that the pressing block can rotate relative to the ball head body but can not be separated from each other is formed.

The invention has novel conception and ingenious structure, well realizes the positioning and the compression of the workpiece, can well control the pressing force of the workpiece, avoids the damage to the workpiece and has the effect of improving the processing efficiency for mass production.

Drawings

FIG. 1 is a front view of the present invention.

FIG. 2 is a top view of the present invention.

FIG. 3 is a schematic view of the connection between the screw 4 and the rod 7 according to the present invention.

FIG. 4 is a schematic view illustrating the engagement of the latch of the present invention into the wedge-shaped groove.

FIG. 5 is a schematic diagram showing the arrangement of wedge grooves on the carrier rod according to the present invention.

Fig. 6 is a partially enlarged view of fig. 2 according to the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in the figures 1-6, the invention comprises a horizontally placed foundation plate 1, two vertical guide plates 2 which are arranged in parallel front and back are arranged above the foundation plate 1, a slide block 3 which can move up and down along the guide plates 2 is arranged between the two guide plates 2, the cross section of the slide block 3 is in a shape of ' Chinese character ' hui ', a screw rod 4 is inserted on the left side wall of the slide block 3, the screw rod 4 is in threaded connection with the slide block 3, a blind hole 5 is arranged at the right end of the screw rod 4, a disc 6 which can slide left and right in the blind hole 5 is arranged in the blind hole 5, the disc 6 can not be separated from the blind hole 5, an ejector rod 7 which can slide left and right along the slide block 3 but can not rotate is inserted on the right side wall of the slide block 3, the left end of the ejector rod 7 is inserted into the blind hole 5 and is fixedly connected with the disc 6, a spring 8 is connected between the left end of the disc 6, the outer edge of the ejector rod 7 is provided with wedge-shaped grooves 9 which are arranged on the right side of the screw rod 4 and are uniformly distributed on the circumference, the inner wall of the matching part of the screw rod 4 and the ejector rod 7 is provided with clamping blocks 10 which are uniformly distributed on the circumference and can radially extend and retract, when the screw rod 4 moves rightwards relative to the ejector rod 7, the clamping blocks 10 can be clamped into the wedge-shaped grooves 9, the clamping blocks 10 are clamped into the wedge-shaped grooves 9, so that the screw rod 4 can only rotate in one direction, and the screw;

the right end of the screw rod 4 is provided with a hemispherical ball head body 11, a pressing block 12 is sleeved on the ball head body 11, a hemispherical groove 13 matched with the ball body is arranged at the sleeved position of the pressing block 12 and the ball head body 11, and the spherical radius of the hemispherical groove 13 is larger than that of the ball head body 11, so that a structure that the pressing block 12 can rotate relative to the ball head body 11 but can not be separated from each other is formed.

In order to adjust the pressing force of the workpiece, a supporting plate 14 arranged on the left side of the disc 6 is arranged in the blind hole 5, the left end of the supporting plate 14 is connected with an adjusting bolt 15, the left end of the adjusting bolt 15 penetrates through the screw rod 4 and is arranged outside the screw rod 4, the adjusting bolt 15 is in threaded connection with the screw rod 4, the spring 8 is connected between the supporting plate 14 and the disc 6, and the spring 8 is in rotational connection with the disc 6.

In order to facilitate the fixture block 10 to be separated from the wedge-shaped groove 9 when the screw rod 4 moves leftwards, the left end of the wedge-shaped groove 9 is in an inclined surface structure.

In order to fix the upper position and the lower position of the sliding block 3, pin shafts 16 are respectively inserted into the front end and the rear end of the sliding block 3, the outer edge surface of one end, arranged on the outer side of the guide plate 2, of the front pin shaft 16 and the rear pin shaft 16 is of a threaded structure, compression nuts 17 are arranged on the outer edge surface, arranged on the outer side of the guide plate 2, of the two pin shafts 16, and the pin shafts 16 can be compressed on the guide plate 2 through the mutual matching of the compression nuts 17 and threads to fix the upper position and the lower position.

In order to realize the up-and-down movement of the sliding block 3, the front and the rear guide plates 2 are respectively provided with a through groove 18 in the vertical direction, the front and the rear pin shafts 16 are respectively inserted into the through grooves 18 on the corresponding sides, and the sliding block 3 can slide up and down between the two guide plates 2 along the through grooves 18 through the pin shafts 16.

In order to better realize compressing tightly and the change of compact heap 12 to aluminium work piece, compact heap 12 adopt the PA to make, the right-hand member of ejector pin 7 is equipped with the connector, the end of connector is equipped with ball body 11, the inboard one end of ball body 11 is equipped with joint screw thread 19 on the connector, be equipped with annular dead slot between the screw thread of joint screw thread 19 and screw rod 4, be equipped with the internal thread with joint screw thread 19 matched with on the compact heap 12, compact heap 12 can be connected with joint screw thread 19 through the internal thread, internal thread length is less than the width of annular dead slot, when spherical recess was arranged in to ball body 11, the internal thread breaks away from and the joint screw thread 19 and the internal thread is arranged in the annular dead slot, realize compact heap 12 can rotate but the structure that can not break away from each.

In order to facilitate the overall adjustment of the clamp and the connection with the machine tool, the lower part of the foundation plate 1 is provided with a base 20, the base 20 is fixedly connected with a workbench through a T-shaped groove of the machine tool workbench, the foundation plate 1 is connected with the base 20 through a bolt, and the foundation plate 1 can move left and right on the base 20.

In order to facilitate screwing the screw rod 4, handles 21 which are uniformly distributed on the circumference are arranged on the outer edge of the left side of the screw rod 4.

When the aluminum product is used, the aluminum product is required to be processed, the aluminum product is made of soft material, so that the positioning and the pressing of the aluminum product are very inconvenient, the pressing block 12 can be pressed on the positioning end face of the aluminum product when the aluminum product is used, the pressing block 12 is made of PA nylon material, the aluminum product has a certain energy dissipation and shock absorption effect, the nylon material is softer than the aluminum product, the pressing face of the aluminum product can be well protected from being crushed, and the concrete operation is as follows: firstly, the upper and lower positions of a sliding block 3 are pressed on a guide plate 2 through a compression nut 17, the upper and lower fixing of the position of the sliding block 3 is realized through the friction force between the compression nut 17 and the guide plate 2, the screw rod 4 is rotated through a handle 21, the rotation of the screw rod 4 drives an ejector rod 7 to move rightwards together through a spring 8, when the right end face of a rightwards moving compression block 12 is contacted with the end face of an aluminum product to be compressed, at the moment, the ejector rod 7 cannot move rightwards continuously under the action of a workpiece, at the moment, the handle 21 is rotated continuously to enable the screw rod 4 to move rightwards continuously, the ejector rod 7 moves leftwards relative to the screw rod 4, when the right end of the screw rod 4 moves rightwards to a wedge-shaped groove 9 on the outer edge of the ejector rod 7, at the moment, a clamping block 10 on the screw rod 4 is clamped in the wedge-shaped groove 9, that is, only the screw rod 4 can be driven to move leftwards, but not the screw rod 4 can be driven to move rightwards, the pressing force of the pressing block 12 on the surface of the aluminum product workpiece can be effectively controlled, and the problems that the workpiece is damaged due to overlarge pressing force and the positioning is not firm due to too small pressing force and the like are solved; in addition, because the compressing block 12 is sleeved on the end of the screw rod 4, and the end of the screw rod 4 is matched with the compressing block 12 through the ball head body 11 and the arc groove, in the process of applying pressure to the compressing block 12, through the matching of the ball head body 11 and the arc groove, because the moving direction of the screw rod 4 is not necessarily in a completely vertical state with the surface of a workpiece, the compressing block 12 can rotate on the surface of the workpiece to a certain extent, the ball head body 11 applies force to the compressing block 12 through the spherical groove, the compressing block 12 and the surface of the workpiece can be always in a joint state, and the compressing effect on the workpiece is well realized.

In addition, when aiming at parts made of materials with different hardness, the pressing force on the workpiece can be adjusted through the adjusting bolt 15, firstly, before the pressing, the adjusting bolt 15 is screwed to enable the supporting plate 14 to move left and right in the blind hole 5, when the spring 8 has a certain compression amount in advance, because the distance between the fixture block 10 on the screw rod 4 and the wedge-shaped groove 9 on the ejector rod 7 is a certain value in the pressing process, the pressing force achieved when the screw rod 4 is rotated is consistent, and different pressing force sizes can be adjusted through the adjustment of the adjusting bolt 15.

In addition, because in the in-service use, along with the long-time use of anchor clamps, compact heap 12 is owing to adopt PA to make, can cause wearing and tearing and hardening phenomenon after long-time use, at this moment because the internal screw thread exists can be very convenient change compact heap 12 on joint screw thread 19 and compact heap 12, specific when changing, relative joint screw thread 19 and the internal screw thread profile of tooth, twist out can, convenient operation, therefore, the clothes hanger is strong in practicability, simultaneously also can adopt the compact heap 12 of different materials to fix a position the operation of compressing tightly to different work pieces.

According to the invention, by designing the interaction structure of the screw rod 4 and the ejector rod 7, the pressing force on the surface of the workpiece can be effectively controlled when the workpiece is pressed, the consistency of the pressing force can be effectively ensured for the same batch of parts, meanwhile, the damage to the surface of the part made of softer material can be effectively reduced, and meanwhile, the requirement of the pressing force can be effectively ensured.

Claims

1. The clamp for processing with the controllable clamping force is characterized by comprising a horizontally placed foundation plate (1), two guide plates (2) which are vertically arranged in parallel front and back are arranged above the foundation plate (1), a sliding block (3) capable of moving up and down along the guide plates (2) is arranged between the two guide plates (2), the cross section of the sliding block (3) is in a shape like a Chinese character 'hui', a screw rod (4) is inserted on the left side wall of the sliding block (3), the screw rod (4) is in threaded connection with the sliding block (3), a blind hole (5) is formed in the right end of the screw rod (4), a disc (6) capable of sliding left and right in the blind hole (5) is installed in the blind hole (5), the disc (6) cannot be separated from the blind hole (5), an ejector rod (7) capable of sliding left and right along the sliding block (3) is inserted on the right side wall of the sliding block (3), the left end of the ejector rod (7) is inserted into the blind hole (, a spring (8) is connected between the left end of the disc (6) and the bottom wall of the blind hole (5), in an initial state, the disc (6) is positioned on the rightmost side of the blind hole (5) under the action of the spring (8), wedge-shaped grooves (9) which are uniformly distributed on the right side of the screw rod (4) and are circumferentially arranged are formed in the outer edge of the ejector rod (7), clamping blocks (10) which are uniformly distributed on the circumference and can radially extend and retract are arranged on the inner wall of the matching part of the screw rod (4) and the ejector rod (7), when the screw rod (4) moves rightwards relative to the ejector rod (7), the clamping blocks (10) can be clamped into the wedge-shaped grooves (9), the clamping blocks (10) are clamped into the wedge-shaped grooves (9) to enable the screw rod (4) to only;

the right end of the screw rod (4) is provided with a hemispherical ball head body (11), the ball head body (11) is sleeved with a pressing block (12), the sleeved part of the pressing block (12) and the ball head body (11) is a hemispherical groove (13) matched with the ball body, the spherical radius of the hemispherical groove (13) is larger than that of the ball head body (11), and a structure that the pressing block (12) can rotate relative to the ball head body (11) but can not be separated from each other is formed;

the blind hole (5) is internally provided with a supporting plate (14) arranged on the left side of the disc (6), the left end of the supporting plate (14) is connected with an adjusting bolt (15), the left end of the adjusting bolt (15) penetrates through the screw rod (4) and is arranged outside the screw rod (4), the adjusting bolt (15) is in threaded connection with the screw rod (4), the spring (8) is connected between the supporting plate (14) and the disc (6), and the spring (8) is in rotational connection with the disc (6).

2. A clamping force controllable clamp for machining according to claim 1, characterized in that the left end of the wedge groove (9) is of a beveled configuration.

3. The clamp with the controllable clamping force for processing according to claim 1, characterized in that pin shafts (16) are respectively inserted into the front end and the rear end of the sliding block (3), the outer edge surfaces of the front pin shaft (16) and the rear pin shaft (16) at the ends, which are arranged outside the guide plate (2), are of a threaded structure, compression nuts (17) are arranged on the outer edge surfaces of the two pin shafts (16), which are arranged outside the guide plate (2), and the pin shafts (16) can be compressed on the guide plate (2) through the mutual matching of the compression nuts (17) and threads to fix the upper position and the lower position of the sliding block (3).

4. The clamp with controllable clamping force for processing according to claim 1, characterized in that the front and rear guide plates (2) are respectively provided with a through groove (18) in the vertical direction, the front and rear pin shafts (16) are respectively inserted into the through grooves (18) on the corresponding sides, and the slide block (3) can slide up and down between the two guide plates (2) along the through grooves (18) through the pin shafts (16).

5. A jig for processing use with controllable clamping force according to claim 1, the pressing block (12) is made of PA, the right end of the ejector rod (7) is provided with a connector, the end of the connector is provided with a ball head body (11), one end of the inner side of the ball head body (11) on the connector is provided with a clamping thread (19), an annular empty groove is formed between the clamping thread (19) and the thread of the screw rod (4), the pressing block (12) is provided with an internal thread matched with the clamping thread (19), the pressing block (12) can be connected with the clamping thread (19) through the internal thread, the length of the internal thread is smaller than the width of the annular empty groove, when the ball head body (11) is arranged in the spherical groove, the internal thread is separated from the clamping thread (19) and is arranged in the annular empty groove, so that the structure that the pressing block (12) can rotate relative to the ball head body (11) but cannot be separated from each other is realized.

6. The clamp with controllable clamping force for processing according to claim 1, wherein a base (20) is arranged below the base plate (1), the base (20) is fixedly connected with a workbench through a T-shaped groove of the workbench of a machine tool, the base plate (1) is connected with the base (20) through a bolt, and the base plate (1) can move left and right on the base (20).

7. A clamping force controllable clamp for machining according to claim 1, characterized in that the screw (4) is provided with handles (21) arranged circumferentially and uniformly on the left outer edge.