Quick-change clamping fixture for shaft type porous parts

Abstract

The utility model relates to the technical field of work fixtures, and discloses a quick-change clamping fixture for shaft porous parts, which realizes axial extension of a target workpiece during clamping through conversion clamping formed by axial matching of a threaded sleeve, a nut and a collet, prevents interference between a cutter and a chuck, and has the effect of widening the application range of the cutter.

Description

TECHNICAL FIELD

[0001] The utility model relates to tooling fixture technical field, concretely is a kind of quick-change tooling fixture of shaft porous parts. BACKGROUND

[0002] When machining shaft porous parts by machining center machine tool or drill center machine tool currently, referring to Figure 1 , shaft porous parts are directly fixed by chuck claw, because of the limitation of workpiece size and machining position requirement, machining tool and tool shank are prone to interference with chuck, machining is limited, and machining difficulty is greater.Simultaneously, the machining time of this kind of part is short, and workpiece rotation frequency is high, because the precision of chuck is not enough, each piece needs to be aligned, time-consuming and laborious, forming the bottleneck of machining preparation stage.Therefore, the existing shaft porous part fixture needs to be improved to realize quick and accurate clamping alignment and avoid tool interference. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a kind of quick-change tooling fixture of shaft porous parts, and the conversion clamping formed by screw sleeve, nut and collet is axially cooperated, the target workpiece is axially extended during clamping, to prevent tool interference, with the effect of improving tool application range.

[0004] The utility model realizes by the following technical scheme:

[0005] The application provides a kind of quick-change tooling fixture of shaft porous parts, including chuck with chuck claw, further comprising:

[0006] Screw sleeve, nut and collet;One end of the screw sleeve is matched with the chuck claw, the screw sleeve is fixed on the chuck, the middle part of the screw sleeve is equipped with limit step, the other end of the screw sleeve is equipped with the external thread matched with the nut, the inside of the screw sleeve is equipped with installation space, the screw sleeve matched with the nut fixes the collet in the installation space;The collet is used to clamp target workpiece.

[0007] To better realize the utility model, further, it further includes: top rod with external thread;The inside of the screw sleeve is further equipped with internal thread matched with the top rod in axial direction, the top rod is inserted into the inside of the collet after penetrating the screw sleeve, to axially limit the target workpiece.

[0008] To better realize the utility model, further, one end of the top rod inserted into the inside of the screw sleeve is equipped with external thread, the other end of the top rod is equipped with twist part matched with screwing tool.

[0009] Further, one end of the screw sleeve matched with the claw is further provided with a limiting boss, and the limiting boss is matched with a limiting hole of the chuck to circumferentially limit the screw sleeve.

[0010] Further, coaxiality between the outer circle of the screw sleeve and the inner hole of the clamping part of the collet is less than or equal to Φ0.01, so that runout of the target workpiece is less than or equal to 0.005.

[0011] Further, the nut is a precision nut.

[0012] Further, the collet is an ER collet.

[0013] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0014] The conversion clamping formed by the screw sleeve, the nut and the collet in the axial direction realizes axial extension of the target workpiece during clamping, prevents interference between the tool and the chuck, and has the effect of improving the application range of the tool.

[0015] By replacing collets of different specifications, the machining requirements of multiple types of parts are met, and the applicability is improved. DRAWINGS

[0016] The utility model is further explained in combination with the following drawings and embodiments, and all the innovative ideas of the utility model should be regarded as the disclosed content and the protection scope of the utility model.

[0017] Figure 1 It is an existing shaft type multi-hole part clamp.

[0018] Figure 2 It is a schematic view of a shaft type multi-hole part quick-change clamping clamp embodiment in the application.

[0019] Figure 3 It is Figure 2 It is a sectional view in the A-A direction.

[0020] Figure 4 It is a schematic view of another shaft type multi-hole part quick-change clamping clamp embodiment in the application.

[0021] Wherein: 1, chuck; 2, screw sleeve; 3, nut; 4, collet; 5, target workpiece; 6, ejector rod. DETAILED DESCRIPTION

[0022] Embodiment 1:

[0023] The shaft type multi-hole part quick-change clamping clamp of the embodiment, see Figure 2, including chuck 1 provided with claw, further comprising:

[0024] screw sleeve 2, nut 3 and collet chuck 4; one end of the screw sleeve 2 cooperates with the claw, and the screw sleeve 2 is fixed on the chuck 1, referring to Figure 3 , the middle part of the screw sleeve 2 is provided with a limiting step, and the other end of the screw sleeve 2 is provided with an external thread matched with the nut 3, and the inside of the screw sleeve 2 is provided with a mounting space, and the screw sleeve 2 cooperates with the nut 3 to fix the collet chuck 4 in the mounting space; the collet chuck 4 is used for clamping target workpiece 5;

[0025] By the screw sleeve 2, the nut 3 and the collet chuck 4 in the axial cooperation, the conversion clamping is formed, and the axial extension of the target workpiece 5 during clamping is realized; through the cooperation of one end of the screw sleeve 2 and the claw, the screw sleeve 2 is fixed on the chuck 1; the limiting step in the middle part of the screw sleeve 2 can keep the distance between the screw sleeve 2 and the claw within a proper range, and also can improve the range of the screw sleeve 2 that can be matched with the nut 3; after the collet chuck 4 is placed in the mounting space, the screwing degree of the nut 3 is adjusted to be properly screwed through the cooperation of the nut 3 and the screw sleeve 2, so that the collet chuck 4 is fixed, and after the target workpiece 5 is placed in the clamping hole of the collet chuck 4, the screwing degree of the nut 3 is further adjusted, so that the stable clamping of the target workpiece 5 is realized.

[0026] Specifically, in the embodiment, the screw sleeve 2 includes a cylindrical base, the top end of the base is sleeved with a limiting step, the top surface of the base is provided with a cylindrical mounting boss, the boss is provided with an external thread, and the boss and the hollow part of the base form a mounting space; the top end of the nut 3 is provided with a limiting part matched with the collet chuck 4, when the nut 3 is screwed, the limiting part will apply pressure to the collet chuck 4 in the axial and circumferential directions, so as to fix the collet chuck 4, and the clamping hole of the collet chuck 4 is compressed to make the target workpiece 5 be clamped.

[0027] The working principle of the embodiment is as follows:

[0028] The nut 3 is loosened, the target workpiece 5 is placed in the appropriate position of the clamping hole of the collet chuck 4 and the nut 3 is tightened, so that the clamping force of the collet chuck 4 can clamp the target workpiece 5, the screw sleeve 2 with the clamped target workpiece 5 is installed in the claw of the chuck 1, and the machining can be performed, during the machining process, the target workpiece 5 is axially extended by the conversion clamping formed by the screw sleeve 2, the nut 3 and the collet chuck 4, and keeps a proper distance from the chuck 1.

[0029] The beneficial effects of the embodiment are as follows:

[0030] The conversion clamping formed by the axial cooperation of the screw sleeve 2, the nut 3 and the collet chuck 4 realizes the axial extension of the target workpiece 5 during clamping, prevents the interference between the tool and the chuck 1, and has the effect of improving the application range of the tool;

[0031] By replacing the chuck 4 of different specifications, the machining requirements of various parts can be met, and the applicability of the chuck 4 is improved.

[0032] Embodiment 2:

[0033] This embodiment is further optimized on the basis of embodiment 1, as shown in the following table: Figure 4

[0034] The top rod provided with external threads; the inside of the screw sleeve 2 is also provided with internal threads matched with the top rod in the axial direction, and the top rod extends into the inside of the chuck 4 after penetrating the screw sleeve 2, so as to axially limit the target workpiece 5.

[0035] By rotating the top rod, the position of the top rod in the chuck 4 can be adjusted, the target workpiece 5 is axially limited, and the target workpiece 5 and the chuck 1 are kept at a specified distance when clamping the target workpiece 5; without completely tightening the nut 3, the position of the target workpiece 5 can also be accurately adjusted by rotating the top rod, and the distance between the target workpiece 5 and the chuck 1 is further accurately adjusted.

[0036] In this embodiment, one end of the top rod extending into the inside of the screw sleeve 2 is provided with external threads, and the other end of the top rod is provided with a twisting part matched with a twisting tool.

[0037] By using this embodiment, the top rod can be easily rotated using a twisting tool; the twisting part can be a straight slot, a cross slot or an internal hexagonal slot, so as to match the corresponding screwdriver or internal hexagonal wrench and other twisting tools.

[0038] In this embodiment, one end of the screw sleeve 2 matched with the claw is also provided with a limiting boss, and the limiting boss is matched with the limiting hole of the chuck 1 to circumferentially limit the screw sleeve 2.

[0039] By using this embodiment, the screw sleeve 2 can be circumferentially limited, which is more conducive to rotating the nut 3 or the top rod.

[0040] The other parts of this embodiment are the same as those of embodiment 1, and will not be described again.

[0041] The working principle of this embodiment is as follows:

[0042] ​Loosen the nut 3, place the target workpiece 5 in the clamping hole of the collet 4 in the appropriate position and tighten the nut 3 properly, so that the collet 4 has a certain clamping force, rotate the top rod to move it axially, adjust the axial clamping position of the target workpiece 5 to avoid interference between the tool and the clamp, while ensuring that enough clamping force is applied to the target workpiece 5, further tighten the nut 3 to make the target workpiece 5 clamped firmly, and then the sleeve 2 clamped with the target workpiece 5 is installed into the chuck jaw of the chuck 1, and the machining can be carried out. During the machining process, the target workpiece 5 is axially extended by the conversion clamping formed by the sleeve 2, the nut 3 and the collet 4, and maintains a proper distance from the chuck 1; after the machining of the target workpiece 5 is completed, loosen the nut 3, remove the current target workpiece 5, and place the next target workpiece 5 into the clamping hole of the collet 4 so that the target workpiece 5 is tightly attached to the top rod, and the replacement is completed without the need for further adjustment.

[0043] The beneficial effects of the present embodiment also include:

[0044] The position of the target workpiece 5 can be accurately adjusted by the top rod, and the distance between the target workpiece 5 and the chuck 1 can be further accurately adjusted to prevent interference between the machining tool and the chuck 1.

[0045] The top rod can axially position the target workpiece 5. After positioning the top rod, the target workpiece 5 does not need to be re-adjusted for tooling without manual loosening, the axial dimension consistency is good, and the machining efficiency is improved.

[0046] Embodiment 3:

[0047] The present embodiment is further optimized based on the above-mentioned embodiments 1 or 2. In the present embodiment, the coaxiality between the outer circle of the sleeve 2 and the inner hole of the clamping part of the collet 4 is less than or equal to Φ0.01, so that the runout of the target workpiece 5 is less than or equal to 0.005.

[0048] In the present embodiment, when machining the target workpiece 5, only the first target workpiece 5 needs to be aligned to meet the process specification, and when installing the subsequent target workpiece 5, only the nut 3 needs to be tightened for clamping, without the need for alignment to meet the process specification, saving a lot of alignment time.

[0049] In the present embodiment, the nut 3 is a precision nut 3, and the collet 4 is an ER collet 4.

[0050] In the present embodiment, since the precision nut 3 and the ER collet 4 are standard parts, they can be replaced according to the clamping size of the workpiece, meeting the machining needs of multiple types of parts and greatly reducing the cost.

[0051] The working principle of the present embodiment is as follows:

[0052] The screw sleeve 2 clamping the target workpiece 5 is installed in the clamping jaw of the chuck 1, the arbitrary outer circle runout of the screw sleeve 2 is aligned to meet the process specification requirements, and then machining can be performed. During the machining process, the target workpiece 5 is axially extended by the conversion clamping formed by the screw sleeve 2, the nut 3 and the collet 4, and maintains a proper distance from the chuck 1. After the machining of the target workpiece 5 is completed, the nut 3 is loosened, the current target workpiece 5 is removed, and the next target workpiece 5 is installed in the clamping hole of the collet 4, without the need for re-alignment.

[0053] The beneficial effects of the embodiment also include:

[0054] Since the coaxiality of the outer circle of the screw sleeve 2 at the clamping position of the chuck 1 and the inner hole at the workpiece clamping position of the collet 4 is ≯Φ0.01, only the first target workpiece 5 needs to be aligned to meet the process specification during machining, and the subsequent target workpieces 5 only need to be clamped by rotating the nut 3, without the need for alignment, which can meet the process specification requirements and save a lot of alignment time.

[0055] Since the precision nut 3 and the ER collet 4 are standard parts, they can be replaced according to the workpiece clamping size to meet the machining requirements of various types of parts, greatly reducing the cost.

[0056] Embodiment 4:

[0057] The embodiment provides an optimal implementation manner of a quick-change clamping fixture for shaft-type multi-hole parts, as shown in Figure 4 In the embodiment, a chuck 1 provided with a clamping jaw is further provided with a screw sleeve 2, a nut 3, a collet 4 and an outer threaded top rod.

[0058] The screw sleeve 2 includes a cylindrical base, a limiting step is sleeved at the top end of the base, a cylindrical mounting boss is arranged on the top surface of the base, an outer thread is arranged on the boss, and the boss and the hollow part of the base form a mounting space.

[0059] The top end of the nut 3 is provided with a limiting part matched with the collet 4, when the nut 3 is tightened, the limiting part applies pressure to the collet 4 in the axial and circumferential directions to fix the collet 4, and the clamping hole of the collet 4 is pressed to clamp the target workpiece 5;

[0060] The bottom of the base is further provided with a limiting boss, the limiting boss is matched with a limiting hole of the chuck 1 to limit the circumferential position of the screw sleeve 2; an inner thread matched with the top rod is further arranged in the interior of the base in the axial direction, that is, the interior of the base and the limiting boss is provided with an inner thread, and the top rod penetrates the limiting boss and the base in sequence and extends into the mounting space formed by the base and the mounting boss.

[0061] The coaxiality of the outer circle of the screw sleeve 2 and the inner hole of the clamping position of the collet 4 is less than or equal to Φ0.01, so that the runout of the target workpiece 5 is less than or equal to 0.005, wherein the outer circle is located at the part matched by the base and the clamping jaw.

[0062] The end of the ejector pin extending into the interior of the sleeve 2 is provided with external threads, and the other end of the ejector pin is provided with a twist portion for cooperating with a twisting tool;

[0063] The nut 3 is a precision nut 3, specifically an ER25UM type precision nut 3, and the collet 4 is an ER collet 4.

[0064] The working principle of the embodiment is as follows:

[0065] The nut 3 is loosened, the target workpiece 5 is placed in the appropriate position of the clamping hole of the collet 4 and the nut 3 is appropriately tightened, so that the collet 4 has a certain clamping force, the ejector pin is rotated to move axially, the axial clamping position of the target workpiece 5 is adjusted to avoid interference between the tool and the clamp, while ensuring that sufficient clamping force is applied to the target workpiece 5, the nut 3 is further tightened to firmly clamp the target workpiece 5, the sleeve 2 with the clamped target workpiece 5 is loaded into the chuck jaw of the chuck 1, and the sleeve 2 is aligned to satisfy the process specification requirements, and then the machining can be performed. During the machining process, the target workpiece 5 is axially extended by the conversion clamping formed by the sleeve 2, the nut 3 and the collet 4, and maintains an appropriate distance from the chuck 1;

[0066] After the machining of the target workpiece 5 is completed, the nut 3 is loosened, the current target workpiece 5 is removed, and the next target workpiece 5 is placed in the clamping hole of the collet 4 so that the target workpiece 5 is tightly attached to the ejector pin, and the replacement is completed without the need for further adjustment and alignment;

[0067] When another specification of target workpiece 5 needs to be replaced, only the appropriate ER25UM type precision nut 3 and ER collet 4 need to be replaced according to the workpiece clamping size.

[0068] In summary, the beneficial effects of the embodiment are as follows:

[0069] 1. The conversion clamping formed by the axial cooperation of the sleeve 2, the nut 3 and the collet 4 realizes the axial extension of the target workpiece 5 during clamping, prevents interference between the tool and the chuck 1, and has the effect of improving the application range of the tool;

[0070] 2. The position of the target workpiece 5 can be accurately adjusted by the ejector pin, and the distance between the target workpiece 5 and the chuck 1 can be further accurately adjusted to prevent interference between the machining tool and the chuck 1;

[0071] 3. The target workpiece 5 can be axially positioned by the ejector pin, and the target workpiece 5 does not need to be re-adjusted after positioning the ejector pin without artificial loosening, the axial size consistency is good, and the machining efficiency is improved;

[0072] 4. Since the coaxiality between the outer circle of the screw sleeve 2 at the clamping point of the chuck 1 and the inner hole of the collet 4 where the workpiece is clamped is ≯Φ0.01, during processing, only the first target workpiece 5 needs to be aligned to meet the process specifications. Subsequent target workpieces 5 only need to be clamped by screwing on the nut 3. No alignment is required to meet the process specifications, saving a lot of alignment time.

[0073] Since the precision nut 3 and ER collet 4 are standard parts, they can be replaced according to the workpiece clamping dimensions to meet the processing needs of various parts and greatly reduce costs.

[0074] This embodiment, while ensuring clamping accuracy and efficiency, saves a significant amount of human resources and production preparation time, reduces production costs, and is highly applicable to the processing of similar parts.

[0075] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A quick change chuck for clamping a shaft-like porous part, comprising a chuck (1) provided with jaws, characterized in that, Also include: The screw sleeve (2) is matched with the claw at one end, and the screw sleeve (2) is fixed on the chuck (1). The middle part of the screw sleeve (2) is provided with a limiting step. The other end of the screw sleeve (2) is provided with an outer thread matched with the nut (3). The inside of the screw sleeve (2) is provided with a mounting space. The screw sleeve (2) matched with the nut (3) fixes the collet (4) in the mounting space. The collet (4) is used to clamp the target workpiece (5).

2. The quick change clamp for a shaft-like porous part according to claim 1, wherein Also include: The top rod provided with external thread; the inside of the screw sleeve (2) is also provided with internal thread matched with the top rod in the axial direction. The top rod extends into the inside of the collet (4) after penetrating the screw sleeve (2), so as to axially limit the target workpiece (5).

3. The quick-change clamping fixture for shaft type multi-hole parts according to claim 2, wherein: The end of the top rod extending into the inside of the screw sleeve (2) is provided with external thread. The other end of the top rod is provided with a twisting part matched with the twisting tool.

4. The quick-change clamping fixture for shaft type multi-hole parts according to claim 1, wherein: The end of the screw sleeve (2) matched with the claw is also provided with a limiting boss. The limiting boss is matched with the limiting hole of the chuck (1), so as to circumferentially limit the screw sleeve (2).

5. The quick-change clamping fixture for shaft type multi-hole parts according to claim 1, wherein: The coaxiality between the outer circle of the screw sleeve (2) and the inner hole of the clamping part of the collet (4) is less than or equal to Φ0.01, so that the runout of the target workpiece (5) is less than or equal to 0.

005.

6. The quick change clamp for a shaft-like porous part according to claim 1, wherein: The nut (3) is a precision nut (3).

7. The quick change clamp for a shaft-like porous part according to claim 1, wherein: The collet (4) is an ER collet (4).

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