CN220094252U

CN220094252U - Clamp and creep feed grinding machine

Info

Publication number: CN220094252U
Application number: CN202322921232.8U
Authority: CN
Inventors: 罗雨; 付双松
Original assignee: Guizhou Liyang Equipment Technology Development Co ltd
Current assignee: Guizhou Liyang Equipment Technology Development Co ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2023-11-28
Anticipated expiration: 2033-10-31

Abstract

The utility model provides a clamp and a creep feed grinding machine, wherein the clamp comprises a base, a clamping platform, a plurality of positioning blocks and a clamping device; each positioning block is arranged corresponding to one positioning part of the workpiece to be clamped, and the height of each positioning block protruding out of the clamping platform is set according to the size of the corresponding positioning part; each positioning block is correspondingly provided with a clamping device, the clamping device is used for fixing a workpiece on the positioning block, and the clamping distance of the clamping device along the vertical direction of the clamping platform is adjustable. The clamping device comprises a fixed sleeve, a stud, an elastic piece, a compression block and a compression nut; the fixed sleeve is detachably connected to the base, the stud penetrates through the fixed sleeve, the elastic piece, the compression block and the compression nut sequentially penetrate through the stud, and the compression nut is located at one end far away from the base. The fixture and the creep feed grinding machine provided by the utility model can clamp the special-shaped workpiece, have universality, can effectively reduce the production cost and improve the processing efficiency.

Description

Clamp and creep feed grinding machine

Technical Field

The utility model relates to the technical field of tool fixtures, in particular to a fixture and a creep feed grinder.

Background

In machining equipment, such as a numerically controlled grinder, a cutting tool is a grinding wheel rotating at a high speed, when a workpiece is machined, the workpiece must be fixed on a machining platform of the numerically controlled grinder by using a high-strength and reliable fixing mode, otherwise, when the equipment is used for machining the workpiece, the workpiece can relatively shift, so that the machining quality (size requirement and surface quality requirement) of the workpiece cannot be guaranteed, and once the cutting tool rotates, the workpiece is hit, so that serious safety accidents of hurting people and equipment can be caused. The numerical control grinding machine equipment has high precision requirement, and when the numerical control grinding machine equipment is used for machining, each motion shaft moves to move the surface to be machined of the workpiece to a proper position, the surface to be machined of the workpiece is contacted with the grinding wheel, and the grinding wheel is used for cutting the surface to be machined of the workpiece. This requires that the workpiece be clamped first and then fixed in place, i.e. positioned accurately.

The workpiece with regular shape can be fixed by conventional magnetic attraction, clamp, universal pressing block and other tools, while the irregularly-shaped workpiece with irregular shape cannot be clamped and fixed by adopting the mode during processing. If the fixture is respectively arranged for clamping the special-shaped workpieces according to different specifications, the machining cost is greatly increased, mass production is not facilitated, and meanwhile, the machining efficiency and the machining precision of the workpieces can be reduced due to frequent disassembly and assembly of the fixture.

Disclosure of Invention

Based on the problems, the utility model provides the clamp and the creep feed grinder, which are used for solving at least one of the problems of poor universality, high production cost, low processing efficiency and the like of the clamp for the special-shaped workpiece in the prior art.

In order to achieve the above object, the technical solution of the embodiment of the present utility model is as follows:

on one hand, the embodiment of the utility model provides a clamp, which comprises a base, a clamping platform fixedly connected with the base, a plurality of positioning blocks arranged on the upper surface of the clamping platform and a clamping device; each positioning block is arranged corresponding to one positioning part of a workpiece to be clamped, and the height of each positioning block protruding out of the clamping platform is set according to the size of the corresponding positioning part; each positioning block is correspondingly provided with one clamping device, the clamping devices are used for fixing a workpiece on the positioning blocks, and clamping distances of the clamping devices along the vertical direction of the clamping platform are adjustable;

the clamping device comprises a fixed sleeve, a stud, an elastic piece, a compression block and a compression nut; the fixing sleeve is detachably connected to the base, the stud penetrates through the fixing sleeve, the elastic piece, the compression block and the compression nut sequentially penetrate through the stud, and the compression nut is located at one end far away from the base; the compression nut is used for driving the compression block to move together when moving towards one end close to the base on the stud so as to compress the workpiece; when the compression nut moves on the stud towards one end far away from the base, the elastic piece stretches to drive the compression block to move together so as to loosen the workpiece.

In one embodiment, the positioning block is fixed on the clamping platform or integrally formed with the clamping platform.

In one embodiment, a stepped hole is formed in a position, corresponding to the fixing sleeve, of the base, the stepped hole comprises a large hole and a small hole, and the large hole is formed in one side, away from the positioning block, of the base;

the fixed sleeve comprises a shaft shoulder and a shaft body which are sequentially connected, the shaft shoulder is arranged at one end, far away from the positioning block, of the fixed sleeve, the shaft shoulder is in clearance fit with the large hole, and the shaft body is in clearance fit with the small hole.

In one embodiment, a first mounting hole is axially formed in one end, far away from the base, of the fixing sleeve, a second mounting hole is axially formed in one end, close to the base, of the fixing sleeve, and the aperture of the first mounting hole is larger than that of the second mounting hole;

the stud is arranged in the second mounting hole, the outer diameter of the stud is matched with the inner diameter of the second mounting hole, and one end of the stud, which is far away from the base, protrudes out of the fixing sleeve;

the pressing block comprises a mounting part and an abutting part arranged at the upper part of the mounting part, and the abutting part is used for abutting against a workpiece so as to fix the workpiece to the positioning block; the mounting part is sleeved on the stud, and is in clearance fit with the first mounting hole;

the elastic piece is sleeved on the stud in the first mounting hole, one end of the elastic piece is abutted with the hole bottom of the first mounting hole, and the other end of the elastic piece is abutted with the mounting part;

and the compression nut is in threaded connection with the stud.

In one embodiment, the mounting portion is provided with a third mounting hole along an axial direction, and a hole bottom of the third mounting hole is used for abutting against the elastic piece.

In one embodiment, the central axis of the mounting portion and the central axis of the abutting portion along the length direction form an included angle, and the included angle is adapted to the shape of the clamping surface of the workpiece.

In one embodiment, the number of the positioning blocks is more than 3.

In another aspect, an embodiment of the utility model provides a creep feed grinder, including a processing platform and a fixture as described above, where the fixture is fixed on the processing platform.

The utility model has at least the following beneficial effects: according to the clamp provided by the embodiment of the utility model, the positioning blocks are arranged on the clamping platform, the height of each positioning block is determined according to the shape and the size of the positioning part of the corresponding workpiece, namely, the height of each positioning block is possibly consistent or inconsistent, so that the clamping of the special-shaped workpiece can be met. The positioning part of the workpiece is fixed at the positioning block through the clamping device, so that the clamping and fixing of the workpiece are realized, and the positioning requirement of the clamping and fixing position is guaranteed, so that the clamping is more accurate. The clamping device has an adjustable clamping distance in the vertical direction of the clamping platform, namely, the clamp can meet the clamping requirements of workpieces with different thicknesses, so that the clamp has certain universality and the input cost of the clamp is reduced. In the batch production process, the workpieces with different thickness specifications can be machined, frequent disassembly and assembly of the clamp can be avoided, the installation time of the clamp is saved, the machining efficiency is improved, the installation precision of the clamp is ensured, and the machining precision is improved.

Drawings

Fig. 1 is a schematic view of a partial cross-sectional structure of a clamp according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of the base of fig. 1.

Fig. 3 is a schematic structural view of the fixing sleeve of fig. 1.

Fig. 4 is a schematic structural view of the compression block of fig. 1.

The meaning of the various reference numerals in the drawings is as follows:

1. a base; 11. a stepped hole; 111. a small hole; 112. a large hole;

2. clamping a platform;

3. a positioning block;

4. a clamping device; 41. a fixed sleeve; 411. a first mounting hole; 412. a second mounting hole; 413. a shaft body; 414. a shaft shoulder; 42. a stud; 43. an elastic member; 44. a compaction block; 441. an abutting portion; 442. a mounting part; 443. a third mounting hole; 45. and (5) compressing the nut.

Detailed Description

The technical scheme of the utility model is further elaborated below by referring to the drawings in the specification and the specific embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the implementations of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In machining, machining is often performed by using an automated device such as a machining center, a numerically controlled milling machine, or a numerically controlled grinding machine. At this time, the workpiece is required to be fixed on a processing platform of the equipment and then processed. If the workpiece is a workpiece with a regular shape, for example, a workpiece with a square section, the workpiece can be fixed by using a pressing block matched with a bolt; as another example, a cylindrically shaped workpiece may be secured using chuck jaws. However, when the workpiece is shaped as a special irregular shaped piece, the workpiece cannot be fixed by the general mode, and a special fixture is required to be customized to fix the workpiece.

The creep feed grinder of an embodiment of the present utility model includes a machining platform (not shown) and a jig fixed to the machining platform. The fixture is detachably connected with the processing platform and is used for installing and fixing a workpiece.

As shown in fig. 1, the clamp of the present embodiment includes a base 1, a clamping platform 2, a positioning block 3, and a clamping device 4. The clamping platform 2 is fixedly connected with the base 1; the positioning block 3 is arranged on the upper surface (the surface far away from the side of the base 1) of the clamping platform 2, and the positioning block 3 is fixedly connected with or integrally formed with the clamping platform 2; the clamping device 4 is fixedly connected with the base 1 and is arranged corresponding to the positioning block 3. In order to ensure the reliability of clamping, the number of the positioning blocks 3 is at least more than 3, and the number of the clamping devices 4 is equal to the number of the positioning blocks 3. The base 1 is provided with a connecting piece, and the clamp is fixed on the processing platform through the connecting piece.

Each workpiece is provided with a plurality of positioning parts, the number and the positions of the positioning parts are respectively corresponding to the positioning blocks 3, and the corresponding positioning parts and the positioning blocks 3 are positioned and fixed, so that the accurate positioning and clamping and fixing of the workpiece can be realized. The height H of each positioning block 3 protruding from the clamping platform 2 can be specifically set according to the size of the corresponding positioning part. Each positioning block 3 is correspondingly provided with a clamping device 4, and the clamping devices 4 are used for fixing workpieces on the positioning blocks 3. That is, each positioning block 3 is matched according to the shape of the lower surface of the workpiece to be clamped, so that the upper surface (surface to be processed) of the workpiece is ensured to keep a preset distance from the processing tool of the creep feed grinding machine. The height H of the positioning block 3 protruding from the clamping platform 2 is set according to the size of the positioning part, so that the clamp can clamp and fix the special-shaped workpiece, and meanwhile, the positioning block 3 and the positioning part are correspondingly arranged, so that the accuracy of workpiece clamping is also ensured, the processing precision and the surface quality of the workpiece are improved, and the reliability of workpiece clamping is ensured. The specific number of the positioning blocks 3 is set according to the special-shaped degree (clamping reliability) and the machining precision requirement of the workpiece, the more the number of the positioning blocks 3 is, the more the machining precision and the clamping reliability are improved, and meanwhile, the manufacturing cost of the clamp and the clamping time are increased. For different workpieces, the positions of the positioning blocks 3 on the clamping platform 2 are not fixed, specific designs are carried out according to the shape, the size (namely the position of a positioning part arranged on the workpiece) and the like of the lower surface of the workpiece to be clamped, and the number and the positions of the positioning blocks 3 of the same batch of workpieces (which can be identical in specification size or different in size only in the thickness direction) can be identical, so that the application range of the clamp is improved.

The clamping device 4 of this embodiment can be detachably connected with the base 1, and the production and the manufacturing of the clamp of being convenient for simultaneously, when the clamping device 4 appears damaging, can change clamping device 4 alone. The clamping device 4 of the present embodiment includes a fixing sleeve 41, a stud 42, an elastic member 43, a compression block 44, and a compression nut 45. The fixing sleeve 41 is fixed on the base 1, the stud 42 is penetrated in the fixing sleeve 41, the elastic piece 43, the compression block 44 and the compression nut 45 are sequentially penetrated on the stud 42, and the compression nut 45 is positioned at one end far away from the base 1; the compression nut 45 is used for driving the compression block 44 to move together when moving towards one end close to the base 1 on the stud 42 so as to compress a workpiece; when the compression nut 45 moves on the stud 42 towards the end far away from the base 1, the elastic member 43 is stretched under the action of elastic force, and drives the compression block 44 to move upwards together so as to loosen the workpiece.

As shown in fig. 2, specifically, in the present embodiment, a stepped hole 11 is provided through a position of the base 1 corresponding to the fixing sleeve 41, the stepped hole 11 includes a large hole 112 and a small hole 111, and the large hole 112 is provided on a side of the base 1 remote from the positioning block 3.

As shown in fig. 3, the fixed sleeve 41 includes a shaft shoulder 414 and a shaft body 413 which are sequentially connected, the outer diameter of the shaft shoulder 414 is larger than that of the shaft body 413, the shaft shoulder 414 is arranged at one end of the fixed sleeve 41 far away from the positioning block 3, and the shaft shoulder 414 is arranged in the large hole 112 and is in clearance fit with the large hole 112; shaft 413 is positioned in aperture 111 and is in clearance fit with aperture 111. The size relationship between the shaft shoulder 414 and the large hole 112 and the small hole 111 can enable the fixed sleeve 41 to be fixedly connected with the base 1 when the fixture is fixed on the processing platform. Alternatively, the fixing sleeve 41 may be fixed to the base 1 by providing a connector.

The fixed sleeve 41 is equipped with first mounting hole 411 along the axial along the one end that keeps away from base 1, and the fixed sleeve 41 is equipped with second mounting hole 412 along the axial along the one end that is close to base 1, and the aperture of first mounting hole 411 is greater than the aperture of second mounting hole 412.

The stud 42 is installed in the second installation hole 412, the outer diameter of the stud 42 and the inner diameter of the second installation hole 412 are matched with each other, and one end of the stud 42 away from the base 1 protrudes from the fixing sleeve 41.

As shown in fig. 4, the pressing block 44 includes a mounting portion 442 and an abutting portion 441, the abutting portion 441 being for abutting against the workpiece to press the workpiece and fix the workpiece to the positioning block 3; the mounting portion 442 is sleeved on the stud 42, and the mounting portion 442 is in clearance fit with the first mounting hole 411. The central axis L2 of the mounting portion 442 and the central axis L1 of the abutting portion 441 are disposed at an included angle, for example, the central axis L2 of the mounting portion 442 in the length direction and the central axis L1 of the abutting portion 441 in the length direction may be disposed perpendicular to each other or disposed at other angles. The specific angle chosen may be determined by the shape of the clamping surface (upper surface) of the workpiece, which angle is required to ensure that the workpiece is clamped.

The elastic member 43 may be, for example, a spring, and the elastic member 43 is sleeved on the stud 42 in the first mounting hole 411, one end of the elastic member 43 abuts against the hole bottom of the first mounting hole 411, and the other end abuts against the mounting portion 442. In order to improve the mounting accuracy of the elastic member 43 and ensure the stretch resetting function of the elastic member 43, a third mounting hole 443 may be further provided on the mounting portion 442, the third mounting hole 443 is provided at an end of the mounting portion 442 away from the abutting portion 441, and the third mounting hole 443 is provided along the axial direction of the mounting portion 442, at this time, the elastic member 43 may be partially located in the third mounting hole 443 and abut against the bottom of the third mounting hole 443, and the aperture of the third mounting hole 443 is matched with the outer diameter of the elastic member 43.

The compression nut 45 is sleeved at one end of the stud 42 far away from the base 1 and is in threaded connection with the stud 42. For the convenience of locking and loosening of the compression nut 45, the compression nut 45 can be arranged to be in a quick-dismantling structure, so that the clamping speed of the clamp is improved, and the production efficiency is improved.

The working principle of the clamp of the embodiment of the utility model is as follows: the fixture is fixed on a processing platform of the creep feed grinding machine, the compression nut 45 is unscrewed upwards, the elastic piece 43 is reset elastically, the compression block 44 is pushed to move upwards, after a proper space distance is reserved between the compression block 44 and the positioning block 3, a workpiece is placed on the positioning block 3, each positioning part is placed corresponding to the respective positioning block 3, the workpiece at each positioning part is sequentially clamped and fixed, the compression nut 45 is screwed downwards during clamping, the compression nut 45 drives the compression block 44 to move downwards and abut against the upper surface of the workpiece, and the workpiece can be clamped at the positioning block 3 by locking the compression nut 45. The workpiece clamping can be fixed in place by sequentially locking each compression nut 45. When the machining is completed, the compression nut 45 is unscrewed upward, the elastic member 43 pushes the compression block 44 upward, and the compression block 44 loosens the work.

According to the creep feed grinding machine and the clamp, the clamp can meet the clamping requirement of the special-shaped workpiece by arranging the plurality of positioning blocks with different protruding heights, and meanwhile, the workpiece can be accurately positioned, so that the machining precision of the workpiece is improved. The clamping device provided by the embodiment of the utility model has a flexible clamping mode, the workpiece can be clamped and fixed only by screwing the compression nut, the workpiece can be loosened by unscrewing the compression nut, and the clamping and loosening operations of the workpiece are very convenient. The compaction block is sleeved on the stud and matched with the elastic piece, so that the clamping distance between the compaction block and the clamping surface of the workpiece is adjustable, the clamp has certain universality, the input cost of the clamp is reduced, meanwhile, the batch production is facilitated, the frequency and time for installing the clamp can be reduced, the clamping efficiency and the machining precision are improved, and the machining quality of the workpiece is ensured.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A fixture, characterized in that: the clamping device comprises a base, a clamping platform fixedly connected with the base, a plurality of positioning blocks arranged on the upper surface of the clamping platform and a clamping device; each positioning block is arranged corresponding to one positioning part of a workpiece to be clamped, and the height of each positioning block protruding out of the clamping platform is set according to the size of the corresponding positioning part; each positioning block is correspondingly provided with one clamping device, the clamping devices are used for fixing a workpiece on the positioning blocks, and clamping distances of the clamping devices along the vertical direction of the clamping platform are adjustable;

2. The clamp as claimed in claim 1, wherein: the positioning block is fixed on the clamping platform or integrally formed with the clamping platform.

3. The clamp as claimed in claim 1, wherein: the base is provided with a stepped hole at a position corresponding to the fixed sleeve, the stepped hole comprises a large hole and a small hole, and the large hole is arranged at one side of the base away from the positioning block;

4. The clamp as claimed in claim 1, wherein: a first mounting hole is formed in one end, far away from the base, of the fixed sleeve in the axial direction, a second mounting hole is formed in one end, close to the base, of the fixed sleeve in the axial direction, and the aperture of the first mounting hole is larger than that of the second mounting hole;

the elastic piece is sleeved on the stud in the first mounting hole, one end of the elastic piece is abutted with the hole bottom of the first mounting hole, and the other end of the elastic piece is abutted with the mounting part; and the compression nut is in threaded connection with the stud.

5. The fixture as recited in claim 4, wherein: and a third mounting hole is axially formed in one end, far away from the abutting part, of the mounting part, and the bottom of the third mounting hole is used for abutting against the elastic piece.

6. The fixture as recited in claim 4, wherein: the axis of installation department with the axis of butt portion along length direction is the contained angle setting, the contained angle suits with the shape of the clamping face of work piece.

7. The clamp as claimed in claim 1, wherein: the number of the positioning blocks is more than 3.

8. The utility model provides a creep feed grinding machine which characterized in that: comprising a processing platform and a clamp according to any one of claims 1 to 7, said clamp being fixed to said processing platform.