阅读说明：本技术 一种截止阀夹持工装及其加工方法 (Stop valve clamping tool and machining method thereof ) 是由 张可欣 李雅娴 张晖 于 2019-12-30 设计创作，主要内容包括：本发明公开了一种截止阀夹持工装及其加工方法,工装包括卡盘,卡盘夹持口的上下端分别设有升降机构和固定部,所述夹持工装还包括第一上夹持块、第一下夹持块和用于分别与第一上夹持块及第一下夹持块定位卡合且通过升降机构的升降运动以定位夹持截止阀的定位夹持机构,第一上夹持块与升降机构连接,第一下夹持块与固定部连接。本发明的夹持工装,能够实现卡盘以较小的行程夹持限位截止阀,夹持工装结构相对较简单,定位效果好,拆装方便,适用性强。(The invention discloses a stop valve clamping tool and a machining method thereof, wherein the tool comprises a chuck, the upper end and the lower end of a chuck clamping opening are respectively provided with a lifting mechanism and a fixing part, the clamping tool also comprises a first upper clamping block, a first lower clamping block and a positioning clamping mechanism which is respectively clamped with the first upper clamping block and the first lower clamping block in a positioning way and is used for positioning and clamping the stop valve through the lifting motion of the lifting mechanism, the first upper clamping block is connected with the lifting mechanism, and the first lower clamping block is connected with the fixing part. The clamping tool can clamp the limiting stop valve by a small stroke, and is relatively simple in structure, good in positioning effect, convenient to disassemble and assemble and strong in applicability.)

1. The utility model provides a stop valve centre gripping frock, includes the chuck, and the upper and lower end of chuck centre gripping mouth is equipped with elevating system and fixed part respectively, its characterized in that, the centre gripping frock still include first grip block, first grip block and be used for respectively with first grip block and first grip block location block and through the elevating system's elevating movement with the location fixture of location centre gripping stop valve, the first grip block of going up is connected with elevating system, first grip block is connected with the fixed part.

2. The stop valve clamping tool according to claim 1, wherein the positioning and clamping mechanism comprises a second upper clamping block and a second lower clamping block, a first positioning protrusion is arranged on the upper end face of the second upper clamping block, a second positioning protrusion is arranged on the bottom end face of the second lower clamping block, a first positioning groove matched with the first positioning protrusion is arranged on the lower end face of the first upper clamping block, and a second positioning groove matched with the second positioning protrusion is arranged on the upper end face of the first lower clamping block.

3. The stop valve clamping tool according to claim 2, wherein the first positioning protrusions are distributed on the upper end face of the second upper clamping block in a cross manner, the second positioning protrusions are distributed on the lower end face of the second lower clamping block in a cross manner, the first positioning grooves are distributed on the lower end face of the first upper clamping block in a cross manner, and the second positioning grooves are distributed on the upper end face of the first lower clamping block in a cross manner.

4. The stop valve clamping tool according to claim 3, wherein the cross-shaped intersection point of the first positioning protrusion, the second positioning protrusion, the first positioning groove and the second positioning groove is located on the central axis of the lifting mechanism.

5. The stop valve clamping tool according to claim 2, wherein the first positioning protrusion and the second positioning protrusion are both V-shaped protrusions, and the first positioning groove and the second positioning groove are both V-shaped grooves.

6. The stop valve clamping tool according to claim 2, wherein the second upper clamping block is provided with a first limiting installation groove and a first clamping portion for clamping the journal of the stop valve, and the second lower clamping block is provided with a second limiting installation groove and a second clamping portion for clamping the journal of the stop valve.

7. The stop valve clamping tool according to claim 1, wherein a first sinking groove for installing and connecting the lifting mechanism is formed in the upper end face of the first upper clamping block, and a second sinking groove for installing and connecting the fixing portion is formed in the lower end face of the second clamping block.

8. The stop valve clamping tool of claim 1, wherein the chuck is connected to a machine tool spindle.

9. The machining method of the stop valve clamping tool according to claim 1, characterized by comprising the following steps of:

firstly, placing a workpiece in a chuck for positioning and clamping;

and step two, starting the machine tool to process the workpiece.

10. The machining method of the stop valve clamping tool according to claim 9, characterized by comprising the following steps:

a, mounting and connecting a first upper clamping block and a lifting mechanism of a chuck, and mounting a first lower clamping block on a fixed part;

b, respectively clamping the upper side and the lower side of the workpiece by a second upper clamping block and a second lower clamping block, and integrally loading the workpiece after clamping into a chuck, so that the V-shaped protrusion of the second lower clamping block is matched and positioned with the V-shaped groove of the first lower clamping block;

c, starting a chuck lifting mechanism, and enabling the V-shaped groove of the first upper clamping block and the V-shaped bulge of the first upper clamping block to be matched and positioned until the two clamping blocks clamp the workpiece through descending;

d, starting the machine tool, and processing all shapes on the first surface of the workpiece;

step e, after the first surface is machined, under the state that the workpiece is clamped, the chuck is rotated to rotate the workpiece by 90 degrees, and the other surface of the workpiece is machined;

and f, sequentially processing four surfaces of the workpiece, which are vertical to each other, according to the operation mode of the fifth step.

Technical Field

The invention belongs to the technical field of stop valve clamping and processing, and particularly relates to a stop valve clamping tool and a processing method thereof.

Background

The chuck is a fixture applied to a numerical control machine tool, is mainly controlled through oil pressure, can switch a machined surface at any time according to machining requirements in the process of clamping a workpiece, achieves rapidness, sensitivity and accuracy, and is very wide in application in the field of machining.

The thinner part of the stop valve shaft neck usually has deeper depth, the limit stroke of the existing chuck can not meet the requirement, the chuck clamping workpiece usually reaches the maximum limit stroke, the clamping part can not completely clamp the stop valve shaft neck, and good limit can not be formed. The positioning of the workpiece is not good, multiple clamping and positioning are often needed, and the problems of line tolerance and the like are easy to occur after the workpiece is processed.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art. Therefore, the invention provides a stop valve clamping tool and a machining method thereof, and aims to meet the clamping and limiting effects on the premise of the existing stroke of a chuck.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a stop valve centre gripping frock, includes the chuck, and the upper and lower end of chuck centre gripping mouth is equipped with elevating system and fixed part respectively, the centre gripping frock still includes first grip block, first grip block and is used for respectively with first grip block and first grip block location block and through the elevating system's elevating movement with the location fixture of location centre gripping stop valve, the first grip block of going up is connected with elevating system, first grip block is connected with the fixed part.

The positioning and clamping mechanism comprises a second upper clamping block and a second lower clamping block, a first positioning protrusion is arranged on the upper end face of the second upper clamping block, a second positioning protrusion is arranged on the bottom end face of the second lower clamping block, a first positioning groove matched with the first positioning protrusion is arranged on the lower end face of the first upper clamping block, and a second positioning groove matched with the second positioning protrusion is arranged on the upper end face of the first lower clamping block.

The first positioning bulges are distributed on the upper end face of the second upper clamping block in a cross manner, the second positioning bulges are distributed on the lower end face of the second lower clamping block in a cross manner, the first positioning grooves are distributed on the lower end face of the first upper clamping block in a cross manner, and the second positioning grooves are distributed on the upper end face of the first lower clamping block in a cross manner.

The cross-shaped intersection points of the first positioning bulge, the second positioning bulge, the first positioning groove and the second positioning groove are positioned on the central axis of the lifting mechanism.

The first positioning bulge and the second positioning bulge are both V-shaped bulges, and the first positioning groove and the second positioning groove are both V-shaped grooves.

The second upper clamping block is provided with a first limiting installation groove and a first clamping part for clamping the journal of the stop valve, and the second lower clamping block is provided with a second limiting installation groove and a second clamping part for clamping the journal of the stop valve.

The upper end face of the first upper clamping block is provided with a first sinking groove for installing and connecting the lifting mechanism, and the lower end face of the second clamping block is provided with a second sinking groove for installing and connecting the fixing part.

The chuck is connected with a machine tool spindle.

The machining method of the stop valve clamping tool comprises the following steps:

firstly, placing a workpiece in a chuck for positioning and clamping;

and step two, starting the machine tool to process the workpiece.

Preferably, the method comprises the steps of:

a, mounting and connecting a first upper clamping block and a lifting mechanism of a chuck, and mounting a first lower clamping block on a fixed part;

b, respectively clamping the upper side and the lower side of the workpiece by a second upper clamping block and a second lower clamping block, and integrally loading the workpiece after clamping into a chuck, so that the V-shaped protrusion of the second lower clamping block is matched and positioned with the V-shaped groove of the first lower clamping block;

c, starting a chuck lifting mechanism, and enabling the V-shaped groove of the first upper clamping block and the V-shaped bulge of the first upper clamping block to be matched and positioned until the two clamping blocks clamp the workpiece through descending;

d, starting the machine tool, and processing all shapes on the first surface of the workpiece;

step e, after the first surface is machined, under the state that the workpiece is clamped, the chuck is rotated to rotate the workpiece by 90 degrees, and the other surface of the workpiece is machined;

and f, sequentially processing four surfaces of the workpiece, which are vertical to each other, according to the operation mode of the fifth step.

The invention has the beneficial effects that: the clamping tool can clamp the limiting stop valve by a small stroke, and is relatively simple in structure, good in positioning effect, convenient to disassemble and assemble and strong in applicability. The method for machining the stop valve by using the tool disclosed by the invention can well guarantee form and position tolerances among 4 surfaces, and reduce the clamping times and the calibration difficulty and time.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a schematic view of the configuration of a pinch shut-off valve of the present invention;

FIG. 2 is an enlarged partial view of the chuck at the point of clamping the shut off valve;

FIG. 3 is a front view of a clamped shut off valve;

FIG. 4 is a side view of a clamped shut off valve;

FIG. 5 is a schematic structural view of a first clamping block;

FIG. 6 is a front view of the shut-off valve;

FIG. 7 is a top view of the shut-off valve;

fig. 8 is a side sectional view of the shut-off valve.

Labeled as:

1. chuck, 2, elevating system, 3, fixed part, 4, first last grip block, 5, first grip block, 6, stop valve, 7, first heavy groove, 8, the heavy groove of second, 9, grip block on the second, 10, grip block under the second, 11, first location is protruding, 12, second location is protruding, 13, first location groove, 14, first clamping part, 15, second clamping part.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation. It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the following embodiments, the terms "first" and "second" do not denote an absolute structural and/or functional distinction or a sequential order of execution, but are merely used for convenience of description.

As shown in fig. 1 to 8, a stop valve clamping tool comprises a chuck 1, wherein the chuck is connected with a machine tool spindle, the upper end and the lower end of a chuck clamping opening are respectively provided with a lifting mechanism 2 and a fixing part 3, the chuck is a hydraulic steering chuck, the lifting mechanism is a hydraulic lifting mechanism and is controlled to lift through a hydraulic oil circuit, the fixing part is a fixing block or a fixing column, the fixing part is fixedly connected with the inner bottom surface of the chuck clamping block, and the fixing part does not move relative to the inner side of the chuck; this centre gripping frock still includes first grip block 4, first grip block 5 and is used for respectively with first grip block 4 and the first grip block 5 location block down and through elevating system's elevating movement with the location fixture of location centre gripping stop valve 6, first grip block 4 is connected with elevating system 2 on, first grip block 5 is connected with fixed part 3.

In order to facilitate the installation and the disassembly, the upper end surface of the first upper clamping block is detachably connected with the bottom lifting end of the lifting mechanism, for example, the connection modes such as clamping connection, threaded connection and the like can be adopted; the bottom surface of the first lower clamping block is connected with the fixing part in a detachable connection mode. Preferably, in order to facilitate positioning, mounting and connecting, a first sinking groove 7 for mounting and connecting the lifting mechanism is arranged on the upper end surface of the first upper clamping block 4, and a second sinking groove 8 for mounting and connecting the fixing part is arranged on the lower end surface of the second clamping block. During installation, the lower telescopic end of the lifting mechanism is inserted into the first sinking groove for limiting connection, and the upper end of the fixing part is inserted into the second sinking groove for limiting connection. As a feasible connection mode, threads are arranged on the side walls of the first sinking groove and the second sinking groove, the lower telescopic end of the lifting mechanism is provided with external threads matched with the threads of the first sinking groove, the upper end of the fixing part is provided with external threads matched with the threads of the second sinking groove, the relative distance between the connection part of the first sinking groove and the second sinking groove can be finely adjusted by the connection mode, and the clamping height in the chuck can be adjusted to a certain degree. As another feasible connection mode, bolt holes are formed in the side walls of the first sinking groove and the second sinking groove, and the corresponding connection ends inserted into the sinking grooves are connected in a limiting and fastening mode through bolts.

The positioning and clamping mechanism comprises a second upper clamping block 9 and a second lower clamping block 10, a first positioning bulge 11 is arranged on the upper end face of the second upper clamping block, a second positioning bulge 12 is arranged on the bottom end face of the second lower clamping block, a first positioning groove 13 matched with the first positioning bulge 9 is arranged on the lower end face of the first upper clamping block 4, and a second positioning groove matched with the second positioning bulge is arranged on the upper end face of the first lower clamping block 5. Through the cooperation of location arch and constant head tank, be convenient for quick location assembly. In order to ensure that the positioning effect is achieved in the transverse and longitudinal directions, the second positioning protrusions are protrusion structures distributed in a cross shape, and the first positioning grooves and the second positioning grooves are positioning grooves distributed in a cross shape. Particularly, first constant head tank is the cross and distributes in the up end of grip block on the second, and the second location is protruding to become the cross and distributes in the lower terminal surface of grip block under the second, and first constant head tank is the cross and distributes in the lower terminal surface of grip block on the first, and the second constant head tank is the cross and distributes in the up end of grip block under the first. The first positioning bulge and the second positioning bulge are both V-shaped bulges, and the first positioning groove and the second positioning groove are both V-shaped grooves. The matched structure of the V-shaped protrusion and the V-shaped groove is adopted, and due to the unique section matched structure, a certain pre-directional force exists between the clamping plates in the pressing process of the lifting mechanism, and the downward force is gradually diffused from point to surface, so that the chuck can better clamp the workpiece of the stop valve at a limit position by a smaller stroke.

The cross-shaped intersection points of the first positioning protrusion 11, the second positioning protrusion 12, the first positioning groove 13 and the second positioning groove are located on the central axis of the lifting mechanism. The coaxial structure is adopted, the stress of the tool is balanced, and the tool has a good stable clamping effect.

For the convenience of better clamping limitation, the second upper clamping block is provided with a first limiting installation groove and a first clamping part 14 for clamping the journal of the stop valve, and the second lower clamping block is provided with a second limiting installation groove and a second clamping part 15 for clamping the journal of the stop valve. The first limiting installation groove is identical to the second limiting installation groove in structure and size, and the first clamping portion is identical to the second clamping portion in structure and size. The two clamping parts are respectively clamped at the upper side and the lower side of the stop valve, and the clamping sections at the two sides of the clamping part are clamped on the shaft neck.

The machining method of the stop valve clamping tool comprises the following steps:

firstly, placing a workpiece in a chuck for positioning and clamping;

and step two, starting the machine tool to process the workpiece.

Specifically, the processing method comprises the following steps:

a, mounting and connecting a first upper clamping block and a lifting mechanism of a chuck, and mounting a first lower clamping block on a fixed part;

b, respectively clamping the upper side and the lower side of the workpiece by a second upper clamping block and a second lower clamping block, and integrally loading the workpiece after clamping into a chuck, so that the V-shaped protrusion of the second lower clamping block is matched and positioned with the V-shaped groove of the first lower clamping block;

c, starting a chuck lifting mechanism, and enabling the V-shaped groove of the first upper clamping block and the V-shaped bulge of the first upper clamping block to be matched and positioned until the two clamping blocks clamp the workpiece through descending;

d, starting the machine tool, and processing all shapes on the first surface of the workpiece;

step e, after the first surface is machined, under the state that the workpiece is clamped, the chuck is rotated to rotate the workpiece by 90 degrees, and the other surface of the workpiece is machined;

and f, sequentially processing four surfaces of the workpiece, which are vertical to each other, according to the operation mode of the fifth step.

The processing method of the invention well ensures form and position tolerance among the four surfaces, and reduces clamping times, calibration difficulty and time.

The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.