CN219233994U

CN219233994U - Numerical control lathe fixture

Info

Publication number: CN219233994U
Application number: CN202223597653.1U
Authority: CN
Inventors: 吴林峰; 荀晓媛; 孟亚龙; 范龙辉
Original assignee: Headman Shanghai Automation Technology Co ltd
Current assignee: Headman Shanghai Automation Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-23
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a numerical control lathe fixture, and belongs to the technical field of automatic fixture. The existing numerical control lathe fixture can not enable a workpiece to be positioned along the circumferential direction. The utility model provides a numerical control lathe fixture, includes anchor clamps body, fixed connection in anchor clamps body a lateral part's holding ring and wears to locate the tensioning assembly in anchor clamps body and the holding ring, is equipped with in the holding ring and stretches out the holding ring along axial slip and one end and keep away from the locating pin of anchor clamps body a lateral part, still is equipped with in the holding ring and acts on the spring that the locating pin is close to on the anchor clamps body one end, has the guide wall that the slope set up on the one end that the locating pin stretched out the holding ring. Through setting up of locating pin in this numerical control lathe anchor clamps for staple bolt class work piece and end cover class work piece can accurate circumference location after the material loading clamping, and need not manual adjustment, also improved clamping precision when having improved clamping efficiency, and thereby this numerical control lathe anchor clamps still accessible change different locating pins adaptation different work pieces.

Description

Numerical control lathe fixture

Technical Field

The utility model belongs to the technical field of automatic clamping, and particularly relates to a numerical control lathe clamp.

Background

And (3) processing the workpiece on a processing center, loading and unloading are realized by using a manipulator, and clamping the workpiece by using a hydraulic clamp or a pneumatic clamp.

For example, an airtight detection vulcanization glue filling clamping device with a chinese patent number CN201920528514 comprises a hydraulic cylinder, a clamp body and an airtight detection device, wherein the clamp body is an integral structure composed of a lower circular body and an upper conical body, the lower end face is placed on the upper part of the hydraulic cylinder, a swelling sleeve is sleeved on the outer surface of the conical body of the clamp body, the outer conical face is contacted with the inner conical face of the swelling sleeve, a positioning block comprises a positioning block body and an air hole on the circular positioning block body, the airtight detection device is communicated with the lower end face of the air hole, the positioning block is fixed on the outer part of the conical body at the upper part of the clamp body through a bolt, the lower end face is pressed on the upper end face of the lower circular body of the clamp body, the end face of a workpiece to be processed is contacted with the positioning block body, and when the swelling sleeve is swelled, the outer surface is contacted with an inner hole of the workpiece to be processed in a parallel and tight manner.

The airtight detection vulcanization glue filling clamping device has the following defects that the workpieces can be tightly tensioned through the tensioning sleeve, when the workpieces are fed and discharged through the manipulator, the circumferential positions of the workpieces are required to be accurately positioned, and if the workpieces are not accurately installed in place, defective products can be directly machined.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a numerical control lathe fixture, which solves the problem that the existing numerical control lathe fixture cannot position a workpiece along the circumferential direction.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a numerical control lathe fixture, includes anchor clamps body, fixed connection in the holding ring of anchor clamps body lateral part and wears to locate the tensioning assembly in anchor clamps body and the holding ring, its characterized in that, the holding ring in be equipped with and follow the locating pin that the axial slip just one end stretches out a holding ring and keep away from anchor clamps body lateral part, still be equipped with in the holding ring and act on the spring that the locating pin is close to on the anchor clamps body one end, the one end that the locating pin stretched out the holding ring on have the guide wall that the slope set up.

Specifically, a through groove is formed in the outer peripheral surface of the hoop workpiece in a penetrating manner along the axial direction, and the hoop workpiece is hereinafter collectively referred to as a hoop workpiece. When the numerical control lathe clamp clamps the hoop workpiece, the mechanical arm firstly sleeves the hoop workpiece on the tensioning assembly and enables one side part of the hoop workpiece to lean against one side part of the positioning ring away from the clamp body, and as the positioning pin with one end extending out of the positioning ring and away from one side part of the clamp body is arranged in the positioning ring, after the mechanical arm places the hoop workpiece on the tensioning assembly and loosens the hoop workpiece, the positioning pin on the positioning ring can lean against two side groove walls of the through groove on the outer peripheral surface of the hoop workpiece, so that the circumferential position of the hoop workpiece is accurately positioned, and the hoop workpiece is tightly tensioned through the tensioning assembly, so that clamping of the hoop workpiece is completed. Because the hoop workpiece can not be accurately supported by the through groove on the outer peripheral surface of the hoop workpiece after the hoop workpiece is placed on the tensioning assembly, the spring acting on the positioning pin and close to one end of the clamp body is arranged in the positioning ring, and the inclined guide wall is arranged at one end of the positioning pin extending out of the positioning ring. Through the setting of locating pin in this numerical control lathe anchor clamps for staple bolt class work piece can accurate circumference location after the material loading clamping, and need not the manual adjustment, has also improved clamping positioning accuracy when having improved clamping efficiency.

In the numerical control lathe fixture, the positioning ring is internally provided with the fixing screw, the fixing screw and the positioning pin are coaxially arranged, and the spring is propped against between the fixing screw and the positioning pin.

The spring is abutted between the fixing screw and the locating pin, so that the locating pin can float along the axial direction (namely, the locating pin can slide along the axial direction), when the locating pin is extruded by the feeding hoop workpiece and the hoop workpiece, the locating pin can extrude the spring and contract towards one side of the clamp body, and the hoop workpiece can be rotated and adjusted along the guide wall under the elasticity of the spring, so that the locating pin can completely extend out and completely abut against two side walls of the through groove on the peripheral surface of the hoop workpiece, and the hoop workpiece can be accurately positioned along the circumferential direction. And through be equipped with the set screw that sets up with the locating pin is coaxial in the locating ring for can take out spring and locating pin after dismantling set screw, thereby can change the locating pin of different elasticity sizes and with different work pieces looks adaptations, thereby also improved the suitability of this numerical control lathe anchor clamps when having guaranteed this numerical control lathe anchor clamps installation accuracy.

In the numerical control lathe fixture, the first mounting hole for fixing the fixing screw and the second mounting hole for penetrating the locating pin are coaxially formed in the locating ring, the aperture of the second mounting hole is smaller than that of the first mounting hole, the clamping portion is arranged at one end, close to the first mounting hole, of the locating pin, the clamping portion abuts against an orifice, close to one end of the mounting hole, of the second mounting hole, and the spring abuts against between the fixing screw and the clamping portion.

Specifically, the first mounting hole is communicated with the second mounting hole. Because mounting hole one and mounting hole two coaxial setting, and the aperture of mounting hole two is less than the aperture of mounting hole one, so during the installation, insert the locating pin in mounting hole one, and make the locating pin pass mounting hole two and stretch out from the drill way department of mounting hole one from the mounting Kong Eryuan, and because the locating pin has the joint portion on being close to the one end of mounting hole one, so after the locating pin stretches out from the one end drill way department of mounting Kong Eryuan from mounting hole one, the joint portion can support to be close to on the one end drill way of mounting hole one of mounting hole two, thereby realize the joint location of locating pin, insert the spring in mounting hole one and make spring one end support with the joint portion, finally with set screw threaded connection in mounting hole one, make the spring other end support on the set screw, thereby make the locating pin can follow axial elasticity slip.

In the numerical control lathe fixture, the second mounting hole is a square hole, the positioning pin is a square pin, one end of the positioning pin extending out of the positioning ring is trapezoid, and the guide wall is an inclined side wall of the trapezoid positioning pin.

Specifically, for the logical groove on staple bolt work piece outer peripheral face, the locating pin in this numerical control lathe anchor clamps stretches out the one end of holding ring and becomes trapezoidal form, and the maximum width of locating pin matches with the groove width of logical groove, and the guide wall is trapezoidal form locating pin's slope lateral wall, when placing the staple bolt work piece on the manipulator, lean against with trapezoidal form locating pin's slope lateral wall earlier through the cell wall of logical groove, and extrude the locating pin to shrink certain distance to mounting hole second, then after the manipulator is released, make the locating pin continuously stretch out the holding ring under the effect of elastic force, thereby make staple bolt work piece can rotate the adjustment along trapezoidal form locating pin's slope lateral wall, until joint portion support to mounting hole second be close to on the drill way of mounting hole first, the locating pin has trapezoidal form one end to stretch out the holding ring completely, thereby make locating pin and staple bolt work piece outer peripheral face go up the both sides cell wall of leading to the groove and support completely, thereby realize staple bolt work piece along circumferential accurate positioning.

In the above-mentioned numerical control lathe fixture, as another technical scheme, the second mounting hole is a round hole, the locating pin is a cylindrical pin, one end of the locating pin extending out of the locating ring is in a shape of a circular table, and the guide wall is an inclined side wall of the circular table locating pin.

Specifically, the numerical control lathe fixture is further suitable for end cover workpieces, the end cover workpieces are collectively called end cover workpieces below, due to the fact that the end cover workpieces are assembly parts, the end cover workpieces are required to be milled with notches or mounting grooves, the end cover workpieces are required to be positioned accurately along the circumferential direction when the notches or the mounting grooves are milled, more specifically, positioning holes for inserting positioning pins are formed in the end cover workpieces, the aperture of each positioning hole is matched with the maximum diameter of each positioning pin, when the end cover workpieces are placed by a manipulator, the aperture opening walls of the positioning holes are abutted against the inclined side walls of the circular truncated cone-shaped positioning pins firstly, the positioning pins are extruded to shrink a certain distance into the mounting holes, then after the manipulator is released, the positioning pins are enabled to extend continuously out of the positioning rings under the action of elastic force, so that the end cover workpieces can be adjusted in a rotating mode along the inclined side walls of the circular truncated cone-shaped positioning pins until the clamping parts are abutted to the aperture opening of the mounting holes close to the first mounting holes, namely, one end of each positioning pin is enabled to extend out of the positioning rings completely, the outer peripheral walls of each positioning pin are enabled to be abutted against the hole walls of the positioning holes completely, and therefore the hoop workpieces are enabled to be positioned accurately along the circumferential direction.

In the numerical control lathe fixture, the first detection air hole is formed in the positioning ring, the third detection air hole is formed in the tensioning assembly, the second detection air hole communicated with the first detection air hole and the third detection air hole is formed in the fixture body, and the air outlet hole of the first detection air hole is located on one side portion, far away from the fixture body, of the positioning ring.

Through the detection gas hole I that the holding ring set up, and the vent hole of detection gas hole I is located the holding ring and keep away from on the lateral part of anchor clamps body for after the manipulator overlaps the work piece on tensioning subassembly and support and keep away from on the lateral part of anchor clamps body in the holding ring, the work piece can give the shutoff with the vent hole of detection gas hole I, the rethread detects gas hole III ventilates to detection gas hole II until in the detection gas hole I, with the compactness of support between this detection work piece and the holding ring.

In the numerical control lathe fixture, the tensioning assembly comprises a tensioning column, a pull rod capable of moving along the axial direction and a tensioning sleeve fixedly connected to one end of the pull rod, the pull rod and the tensioning sleeve are sleeved on the tensioning column, the tensioning column is in a round table shape, and when the pull rod moves in the direction away from the tensioning column, the tensioning sleeve can abut against the peripheral surface of the tensioning column and gradually increase the diameter of the tensioning sleeve.

Specifically, stretch out the holding ring in tight cover one end, when the manipulator material loading work piece, first with the work piece cover on the tight cover stretches out the one end of holding ring and make the work piece and the holding ring keep away from a side of anchor clamps body and prop up and lean on, the manipulator loosens the work piece back locating pin makes the work piece along circumference accurate positioning under the effect of elasticity, through tensioning the pull rod this moment, make the pull rod move towards keeping away from the direction of tensioning post, because tight cover links firmly with the pull rod, the pull rod can drive tight cover that rises and remove, make tight cover that rises and be round platform form tensioning post's outer peripheral face and prop up and lean on, along with the tight post that rises with tight cover that rises the diameter of propping up the part increases gradually, the diameter of tight cover that rises also can increase gradually, thereby rise tight work piece, make the work piece follow axial fixturing, thereby accomplish the material loading clamping of work piece.

Compared with the prior art, the numerical control lathe clamp has the following advantages: through setting up of locating pin in this numerical control lathe anchor clamps for staple bolt class work piece and end cover class work piece can accurate circumference location after the material loading clamping, and need not manual adjustment, also improved clamping precision when having improved clamping efficiency, and thereby this numerical control lathe anchor clamps still accessible change different locating pins adaptation different work pieces.

Drawings

FIG. 1 is a cross-sectional view of the present numerical control lathe fixture;

FIG. 2 is a front view and a cross-sectional view of the cooperation of the locating ring, the locating pin, the spring and the fixing screw in the numerical control lathe fixture;

FIG. 3 is a schematic view of the structure of the locating pin in the numerical control lathe fixture;

FIG. 4 is a front view and a cross-sectional view of the mating of the retaining ring, the retaining pin, the spring and the set screw of the second embodiment;

fig. 5 is a schematic structural view of a positioning pin in the second embodiment.

In the figure, 1, a clamp body; 1a, detecting an air hole II; 2. a positioning ring; 2a, detecting a first air hole; 2b, a first mounting hole; 2c, mounting holes II; 3. a tensioning assembly; 3a, a pull rod; 3a1, detecting an air hole III; 3b, tensioning the sleeve; 3c, tensioning the column; 4. a positioning pin; 4a, a clamping part; 4b, guide walls; 5. a fixing screw; 6. a spring; 7. and (5) hooping the workpiece.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

Example 1

As shown in fig. 1 to 3, a numerically controlled lathe fixture comprises a fixture body 1, a positioning ring 2 in threaded connection with one side of the fixture body 1, and a tensioning assembly 3 penetrating through the fixture body 1 and the positioning ring 2, wherein a positioning pin 4 capable of sliding axially and extending out of the positioning ring 2 from one side of the fixture body 1 is arranged in the positioning ring 2, a spring 6 acting on the positioning pin 4 and close to one end of the fixture body 1 is further arranged in the positioning ring 2, and a guide wall 4b arranged obliquely is arranged at one end of the positioning pin 4 extending out of the positioning ring 2. Specifically, a through groove is formed in the outer peripheral surface of the hoop workpiece in a penetrating manner in the axial direction, and the hoop workpiece 7 is hereinafter collectively referred to as a hoop workpiece. When the numerical control lathe clamp clamps the hoop workpiece 7, the mechanical arm firstly sleeves the hoop workpiece 7 on the tensioning assembly 3 and enables one side part of the hoop workpiece 7 to lean against one side part of the positioning ring 2 far away from the clamp body 1, and as one end of the positioning pin 4 extending out of the positioning ring 2 and far away from one side part of the clamp body 1 is clamped in the positioning ring 2, after the mechanical arm places the hoop workpiece 7 on the tensioning assembly 3 and loosens the hoop workpiece 7, the positioning pin 4 on the positioning ring 2 can lean against the groove walls on two sides of a through groove on the outer peripheral surface of the hoop workpiece 7, so that the circumferential position of the hoop workpiece 7 is accurately positioned, and the hoop workpiece 7 is tensioned through the tensioning assembly 3, so that clamping of the hoop workpiece 7 is completed. Since the hoop workpiece 7 cannot be accurately placed on the tensioning assembly 3 through the through groove on the outer peripheral surface of the hoop workpiece 7 when the mechanical arm feeds the hoop workpiece 7, the through groove can be accurately abutted against the positioning pin 4, the spring 6 acting on the positioning pin 4 near one end of the clamp body 1 is arranged in the positioning ring 2, and the inclined guide wall 4b is arranged at one end of the positioning pin 4 extending out of the positioning ring 2, so that when the hoop workpiece 7 is fed by the mechanical arm, the guide wall 4b on the positioning pin 4 is abutted against the groove wall of the through groove on the outer peripheral surface of the hoop workpiece 7, the positioning pin 4 presses the spring 6 for a certain distance, and then after the mechanical arm loosens the hoop workpiece 7, the positioning pin 4 extends towards one side of the positioning ring 2 far away from the clamp body 1 under the action of elastic force, the hoop workpiece 7 can be slightly rotated and adjusted along the guide wall 4b, and the groove walls on the two sides of the through groove on the outer peripheral surface of the hoop workpiece 7 are completely abutted against the side walls of the positioning pin 4, so that the circumferential position of the hoop workpiece 7 is accurately positioned.

Further, as shown in fig. 1 to 3, the fixing screw 5 is connected to the positioning ring 2 through an internal thread, the fixing screw 5 and the positioning pin 4 are coaxially arranged, and the spring 6 is abutted between the fixing screw 5 and the positioning pin 4, so that the positioning pin 4 is arranged in a floating manner (namely, the positioning pin 4 can slide along an axial direction), when the feeding hoop workpiece 7 and the hoop workpiece 7 press the positioning pin 4, the positioning pin 4 can press the spring 6 and contract towards one side of the clamp body 1, and the hoop workpiece 7 can be rotated and adjusted along the guide wall 4b under the elasticity of the spring 6, so that the positioning pin 4 is completely extended and is completely abutted against two side walls of a through groove on the outer peripheral surface of the hoop workpiece 7, and thus, the accurate positioning of the hoop workpiece 7 along the circumferential direction is completed. And through be equipped with in the holding ring 2 with the coaxial set up of locating pin 4 set screw 5 for can take out spring 6 and locating pin 4 after dismantling set screw 5, thereby can change different elasticity sizes and with the locating pin 4 of different work piece looks adaptations, thereby also improved the suitability of this numerical control lathe anchor clamps when having guaranteed this numerical control lathe anchor clamps installation accuracy.

As shown in fig. 1 to 3, further, a first mounting hole 2b for fixing the fixing screw 5 and a second mounting hole 2c for penetrating the locating pin 4 are coaxially formed in the locating ring 2, the aperture of the second mounting hole 2c is smaller than that of the first mounting hole 2b, a clamping portion 4a is arranged at one end, close to the first mounting hole 2b, of the locating pin 4, the clamping portion 4a abuts against an orifice, close to one end of the first mounting hole 2b, of the second mounting hole 2c, and the spring 6 abuts against between the fixing screw 5 and the clamping portion 4 a. Specifically, the first mounting hole 2b is communicated with the second mounting hole 2c, so that during mounting, the positioning pin 4 is inserted into the first mounting hole 2b, the positioning pin 4 penetrates through the second mounting hole 2c to extend out of the hole of the second mounting hole 2c away from the first mounting hole 2b, and since the clamping portion 4a is arranged at one end of the positioning pin 4, which is close to the first mounting hole 2b, the clamping portion 4a can abut against the hole of the first mounting hole 2c, which is close to the first mounting hole 2b, after the positioning pin 4 extends out of the hole of the second mounting hole 2c, which is close to the first mounting hole 2b, so that the clamping positioning of the positioning pin 4 is realized, the spring 6 is inserted into the first mounting hole 2b, one end of the spring 6 abuts against the clamping portion 4a, and finally the fixing screw 5 is connected into the first mounting hole 2b in a threaded manner, so that the other end of the spring 6 abuts against the fixing screw 5, and the positioning pin 4 can elastically slide along the axial direction.

Further, as shown in fig. 1 to 3, specifically, the second mounting hole 2c is a square hole, the positioning pin 4 is a square pin, one end of the positioning pin 4 extending out of the positioning ring 2 is trapezoid, and the guiding wall 4b is an inclined side wall of the trapezoid positioning pin 4. More specifically, for the through groove on the outer peripheral surface of the hoop workpiece 7, one end of the positioning pin 4 in the numerical control lathe fixture, extending out of the positioning ring 2, is in a trapezoid shape, the maximum width of the positioning pin 4 is matched with the groove width of the through groove, the guide wall 4b is the inclined side wall of the trapezoid positioning pin 4, when the hoop workpiece 7 is placed on the manipulator, the groove wall of the through groove is abutted against the inclined side wall of the trapezoid positioning pin 4 first, the positioning pin 4 is extruded to shrink a certain distance inwards towards the mounting hole 2c, and then after the manipulator is released, the positioning pin 4 is enabled to extend out of the positioning ring 2 continuously under the action of elastic force, so that the hoop workpiece 7 can be adjusted in a rotating mode along the inclined side wall of the trapezoid positioning pin 4 until the clamping part 4a abuts against the orifice of the mounting hole 2b close to the mounting hole 2b, namely, one end of the positioning pin 4 is provided with the trapezoid shape, so that the two sides of the through groove on the outer peripheral surface of the hoop workpiece 7 abut against the positioning pin completely, and the hoop workpiece 7 can be positioned accurately and positioned circumferentially.

As shown in fig. 1 to 3, further, a first detection air hole 2a is formed in the positioning ring 2, a third detection air hole 3a1 is formed in the tightening assembly 3, a second detection air hole 1a which is communicated with the first detection air hole 2a and the third detection air hole 3a1 is formed in the clamp body 1, specifically, the second detection air hole 1a is formed on the pull rod 3a, and an air outlet hole of the first detection air hole 2a is located on a side portion, far away from the clamp body 1, of the positioning ring 2. Through the first detection air hole 2a that sets up in the holding ring 2, and the apopore mouth of the first detection air hole 2a is located on the holding ring 2 keeps away from a lateral part of anchor clamps body 1 for after the manipulator overlaps the work piece on tensioning subassembly 3 and support and lean on the holding ring 2 keeps away from a lateral part of anchor clamps body 1, the work piece can give the shutoff with the apopore mouth of the first detection air hole 2a, the rethread detects air hole three 3a1 ventilates to detect air hole two 1a until in the first detection air hole 2a, with this compactness of support between detection work piece and the holding ring 2.

Further, as shown in fig. 1 to 3, the tightening assembly 3 includes a tightening post 3c, a pull rod 3a capable of moving along an axial direction, and a tightening sleeve 3b fixedly connected to one end of the pull rod 3a, wherein the pull rod 3a and the tightening sleeve 3b are both sleeved on the tightening post 3c, the tightening post 3c is in a circular truncated cone shape, and when the pull rod 3a moves in a direction away from the tightening post 3c, the tightening sleeve 3b can abut against the peripheral surface of the tightening post 3c and the tightening sleeve 3b gradually increases in diameter. Specifically, when the manipulator loads a workpiece, one end of the tensioning sleeve 3b extends out of the positioning ring 2, the workpiece is sleeved on one end of the tensioning sleeve 3b extending out of the positioning ring 2, the workpiece abuts against one side portion of the positioning ring 2 away from the clamp body 1, the positioning pin 4 enables the workpiece to be positioned accurately in the circumferential direction under the action of elastic force after the manipulator loosens the workpiece, at the moment, the pull rod 3a moves towards the direction away from the tensioning column 3c by tensioning the pull rod 3a, and the pull rod 3a drives the tensioning sleeve 3b to move due to the fact that the tensioning sleeve 3b is fixedly connected with the pull rod 3a, the tensioning sleeve 3b abuts against the outer circumferential surface of the round table-shaped tensioning column 3c, the diameter of the tensioning sleeve 3b is gradually increased along with the gradual increase of the abutting portion of the tensioning column 3c and the tensioning sleeve 3b, and accordingly the workpiece is tensioned, the workpiece is fixed in the axial direction, and loading and clamping of the workpiece are completed.

Example two

The second embodiment is basically the same as the first embodiment, except that, as shown in fig. 4 and 5, the second mounting hole 2c is a circular hole, the positioning pin 4 is a cylindrical pin, one end of the positioning pin 4 extending out of the positioning ring 2 is in a truncated cone shape, and the guiding wall 4b is an inclined side wall of the truncated cone-shaped positioning pin 4. Specifically, the numerical control lathe fixture is further suitable for end cover workpieces, the end cover workpieces are collectively called end cover workpieces below, due to the fact that the end cover workpieces are assembly parts, the end cover workpieces are required to be milled with notches or mounting grooves, the end cover workpieces are required to be positioned accurately along the circumferential direction when the notches or the mounting grooves are milled, more specifically, positioning holes for inserting the positioning pins 4 are formed in the end cover workpieces, the aperture of each positioning hole is matched with the maximum diameter of the corresponding positioning pin 4, when the end cover workpieces are placed by a manipulator, the aperture opening wall of each positioning hole is abutted against the inclined side wall of the corresponding positioning pin 4, the positioning pins 4 are extruded to shrink inwards by a certain distance towards the corresponding mounting hole 2c, then after the manipulator is released, the positioning pins 4 continuously extend out of the positioning rings 2 under the action of elastic force, so that the end cover workpieces can be adjusted in a rotating mode along the inclined side walls of the corresponding positioning pins 4 until the corresponding mounting holes 2c are abutted to the aperture of the corresponding mounting holes 2b, namely, one end of each positioning pin 4 is provided with the corresponding positioning ring 2, and therefore the outer circumferential wall of each positioning pin 4 is abutted against the corresponding positioning hole, and the corresponding hoop 7 is completely positioned and accurately along the circumferential direction of the workpiece.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a numerical control lathe fixture, includes anchor clamps body (1), fixed connection in anchor clamps body (1) holding ring (2) of a lateral part and wears to locate anchor clamps body (1) and holding ring (2) in taut subassembly (3), its characterized in that, holding ring (2) in be equipped with can follow axial slip and one end stretches out holding ring (2) and keep away from holding ring (1) holding pin (4) of a lateral part, still be equipped with in holding ring (2) and act on holding pin (4) and be close to spring (6) on anchor clamps body (1) one end, holding pin (4) stretch out holding ring (2) one end on have guide wall (4 b) that the slope set up.

2. The numerical control lathe clamp according to claim 1, characterized in that a fixing screw (5) is arranged in the positioning ring (2), the fixing screw (5) and the positioning pin (4) are coaxially arranged, and the spring (6) is abutted between the fixing screw (5) and the positioning pin (4).

3. The numerical control lathe clamp according to claim 2, characterized in that a first mounting hole (2 b) for fixedly connecting a fixing screw (5) and a second mounting hole (2 c) for penetrating a locating pin (4) are coaxially formed in the locating ring (2), the aperture of the second mounting hole (2 c) is smaller than that of the first mounting hole (2 b), a clamping part (4 a) is arranged at one end, close to the first mounting hole (2 b), of the locating pin (4), the clamping part (4 a) abuts against an orifice, close to one end of the first mounting hole (2 b), of the second mounting hole (2 c), and the spring (6) abuts against a position between the fixing screw (5) and the clamping part (4 a).

4. A numerically controlled lathe clamp according to claim 3, characterized in that the second mounting hole (2 c) is a square hole, the positioning pin (4) is a square pin, one end of the positioning pin (4) extending out of the positioning ring (2) is trapezoid, and the guiding wall (4 b) is an inclined side wall of the trapezoid positioning pin (4).

5. A numerically controlled lathe clamp according to claim 3, characterized in that the second mounting hole (2 c) is a round hole, the positioning pin (4) is a cylindrical pin, one end of the positioning pin (4) extending out of the positioning ring (2) is in a shape of a truncated cone, and the guide wall (4 b) is an inclined side wall of the truncated cone-shaped positioning pin (4).

6. The numerical control lathe clamp according to claim 4 or 5, characterized in that a first detection air hole (2 a) is formed in the positioning ring (2), a third detection air hole (3 a 1) is formed in the tensioning assembly (3), a second detection air hole (1 a) which is communicated with the first detection air hole (2 a) and the third detection air hole (3 a 1) is formed in the clamp body (1), and an air outlet hole of the first detection air hole (2 a) is formed in a side part, far away from the clamp body (1), of the positioning ring (2).

7. The numerical control lathe clamp according to claim 6, wherein the tensioning assembly (3) comprises a tensioning column (3 c), a pull rod (3 a) capable of moving along the axial direction and a tensioning sleeve (3 b) fixedly connected to one end of the pull rod (3 a), the pull rod (3 a) and the tensioning sleeve (3 b) are sleeved on the tensioning column (3 c), the tensioning column (3 c) is in a circular truncated cone shape, and when the pull rod (3 a) moves in a direction away from the tensioning column (3 c), the tensioning sleeve (3 b) can abut against the outer peripheral surface of the tensioning column (3 c) and the diameter of the tensioning sleeve (3 b) can be gradually increased.