CN223476494U

CN223476494U - A fast positioning and clamping device for internal gear slotting of disc-type workpieces

Info

Publication number: CN223476494U
Application number: CN202422940775.9U
Authority: CN
Inventors: 孟怡辰; 孟江涛; 安宁; 吴延奇
Original assignee: Luoyang Freco Automotive Parts Co ltd
Current assignee: Luoyang Freco Automotive Parts Co ltd
Priority date: 2024-11-30
Filing date: 2024-11-30
Publication date: 2025-10-28
Anticipated expiration: 2034-11-30

Abstract

The utility model discloses a rapid positioning and clamping device for internal tooth slotting processing of disc workpieces, which relates to the technical field of tooth processing and comprises a collapsible sleeve, a positioning seat and a pull rod, wherein a plurality of dividing grooves are formed in the outer side of the collapsible sleeve along the circumferential direction of the collapsible sleeve, cavities are formed in the upper end and the lower end of the collapsible sleeve, the diameter of the cavity at the upper end of the collapsible sleeve is matched with that of the lower end of a part to be processed, a cavity matched with the collapsible sleeve is formed in the upper portion of the positioning seat, the collapsible sleeve is axially and slidably arranged in the cavity, and the pull rod is used for pulling the collapsible sleeve to slide downwards and enable the collapsible sleeve to generate elastic deformation to clamp the part to be processed. The quick positioning and clamping device for the internal tooth slotting processing of the disc workpiece is characterized in that the pull rod is used for pulling the expansion sleeve to enable the expansion sleeve to generate elastic deformation to clamp and fix the part to be processed, so that the quick clamping of the part to be processed is realized, and the positioning is accurate and stable.

Description

Quick positioning and clamping device for internal tooth slotting machining of disc workpieces

Technical Field

The utility model relates to the technical field of tooth machining, in particular to a rapid positioning and clamping device for internal tooth slotting machining of disc workpieces.

Background

In the development process of daily new products, a special disc workpiece is often encountered, an internal cavity of the disc workpiece is formed by combining inner straight teeth and a smooth hole, the diameter of the inner straight teeth is larger than that of the inner holes, and the workpiece can only be realized by slotting the inner teeth.

When the three-jaw chuck is used for slotting the inner straight teeth by taking the outer boss of the workpiece as a reference, the precision limitation of the three-jaw chuck causes that the shape and position tolerance of the machined inner straight teeth and the outer circles of the inner hole and the outer boss is out of tolerance occasionally, thus generating unqualified products, and the three-jaw chuck depends on manual operation, has low efficiency and high labor intensity, thus being not an ideal positioning scheme.

Therefore, it is necessary to provide a quick positioning and clamping device for the internal tooth slotting machining of disc workpieces to solve the above problems.

Disclosure of utility model

(One) solving the technical problems

The utility model aims to provide a rapid positioning and clamping device for internal tooth slotting processing of a disc workpiece, which aims to solve the problems of inconvenient workpiece clamping and limited positioning precision of the existing positioning device for internal tooth slotting processing of the disc workpiece in the background technology.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme that the rapid positioning and clamping device for the internal tooth slotting processing of the disc workpiece comprises the following components:

The outer side of the expansion sleeve is provided with a plurality of dividing grooves along the circumferential direction of the expansion sleeve, the upper end and the lower end of the expansion sleeve are respectively provided with a cavity, and the diameter of the cavity at the upper end of the expansion sleeve is matched with the diameter of the lower end of a part to be processed;

the upper part of the positioning seat is provided with a cavity matched with the collapsible sleeve, and the collapsible sleeve is axially and slidably arranged in the cavity;

The pull rod is used for pulling the expansion sleeve to slide downwards and enabling the expansion sleeve to generate elastic deformation to clamp the part to be processed.

Preferably, the pull rod and the expansion sleeve are coaxially arranged, one end of the pull rod is provided with a disc, and the other end of the pull rod sequentially penetrates through the expansion sleeve and the positioning seat to be connected with the driving mechanism.

Preferably, a disc spring is arranged between the expansion sleeve and the positioning seat, and the disc spring is sleeved on the outer side of the pull rod.

Preferably, the outside of the expansion sleeve is provided with a limiting ring, the upper end of the positioning seat is fixedly connected with a compression ring, and the inner side of the compression ring is provided with a ring groove matched with the limiting ring.

Preferably, when the expansion sleeve ascends to the limit position, the disc spring is in a compressed state.

Preferably, the outer wall of the expansion sleeve is sequentially provided with a first cylindrical surface, a second cylindrical surface, a third cylindrical surface and a fourth cylindrical surface from top to bottom, the first cylindrical surface and the third cylindrical surface are respectively in sliding connection with the compression ring and the positioning seat, the second cylindrical surface is positioned at the outer side of the limiting ring, and the diameter of the fourth cylindrical surface is smaller than the diameter of the cavity of the positioning seat.

Preferably, the upper end face of the limiting ring is provided with a first conical surface, a second conical surface is arranged between the annular groove and the inner wall of the compression ring, and the angle between the first conical surface and the axis of the expansion sleeve is smaller than that between the second conical surface and the axis of the compression ring by 3-5 degrees.

Preferably, the bottom of the cavity at the upper end of the expansion sleeve is upwards protruded to form a round table, and the round table is in arc transition with the wall of the cavity.

Preferably, the positioning seat further comprises a transition connecting disc, a concave spigot is arranged in the middle of the bottom end of the positioning seat, a convex spigot matched with the concave spigot is arranged in the middle of the top end of the transition connecting disc, and the positioning seat is fixedly connected with the transition connecting disc.

(III) beneficial effects

Compared with the prior art, the utility model provides the rapid positioning and clamping device for the internal tooth slotting processing of the disc workpiece, which has the following beneficial effects:

1. This quick positioning and clamping device of disk class work piece internal tooth slotting process is through setting up the positioning seat to set up the expansion sleeve that descends by the pull rod traction in the positioning seat, make the upper portion cavity of expansion sleeve produce elastic deformation under the traction of pull rod and will wait to process the part centre gripping fixedly, thereby realize waiting to process the quick clamping of part, its location is accurate, stable.

2. According to the quick positioning and clamping device for internal tooth slotting processing of the disc-type workpiece, the disc spring is arranged, so that the expansion sleeve can automatically reset, and meanwhile, under the action of the disc spring, the inner caliber at the upper end of the expansion sleeve is always in an opening trend and is kept to be the largest, so that the part to be processed is more convenient to assemble and disassemble.

Drawings

FIG. 1 is a schematic view of a collapsible sleeve of the present utility model in a relaxed state;

FIG. 2 is a schematic view of the status of the collapsible ferrule of the present utility model as a tightened workpiece;

FIG. 3 is a schematic diagram of the present utility model at A of FIG. 1;

FIG. 4 is a schematic diagram of the present utility model at B of FIG. 2;

FIG. 5 is a schematic cross-sectional view of a collapsible sleeve of the present utility model;

FIG. 6 is a schematic top view of the collapsible sleeve of the present utility model;

FIG. 7 is a schematic cross-sectional view of a positioning seat according to the present utility model;

fig. 8 is a schematic cross-sectional view of a transition joint of the present utility model.

In the drawing, a pull rod, a2, a collapsible sleeve, a 3, a disc spring, a 4, a pressing ring, a 5, a positioning seat, a 6, a transition connecting disc, a 7, a part to be processed, an 8, an annular groove, a 9, a limiting ring, a 10, a through hole, an 11, a round table, a 12, a first cylindrical surface, a 13, a second cylindrical surface, a 14, a third cylindrical surface, a 15, a fourth cylindrical surface, a 16, a dividing groove, a 17, a concave spigot and a 18, a convex spigot are arranged.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-8, a rapid positioning and clamping device for internal tooth slotting processing of disc workpieces comprises a collapsible sleeve 2, a positioning seat 5, a pull rod 1 and a pull rod 1, wherein a plurality of dividing grooves 16 are formed in the outer side of the collapsible sleeve 2 along the circumferential direction of the collapsible sleeve 2, cavities are formed in the upper end and the lower end of the collapsible sleeve 2, the diameter of the cavity at the upper end of the collapsible sleeve 2 is matched with that of the lower end of a part 7 to be processed, a cavity matched with the collapsible sleeve 2 is formed in the upper portion of the positioning seat 5, the collapsible sleeve 2 is axially and slidably arranged in the cavity along the axial direction of the collapsible sleeve 2, and the pull rod 1 is used for pulling the collapsible sleeve 2 to slide downwards and enable the collapsible sleeve 2 to elastically deform so as to clamp the part 7 to be processed. Preferably, the caliber size of the cavity at the upper end is slightly larger than the diameter of the bottom end of the part 7 to be processed by 0.04-0.07mm, so that the workpiece can be conveniently assembled and disassembled.

When the part 7 to be processed is positioned, the lower end of the part 7 to be processed is placed in the cavity at the upper end of the collapsible sleeve 2, the collapsible sleeve 2 is pulled to descend in the cavity through the pull rod 1, and after the lower end face of the collapsible sleeve 2 contacts with the bottom face of the cavity, the pull rod 1 continuously descends to enable the collapsible sleeve 2 to elastically deform, so that the cavity wall of the cavity at the upper end of the collapsible sleeve 2 is driven to gather towards the center to clamp the part 7 to be processed.

Specifically, the pull rod 1 and the collapsible sleeve 2 are coaxially arranged, one end of the pull rod 1 is provided with a disc, and the other end of the pull rod 1 sequentially penetrates through the collapsible sleeve 2 and the positioning seat 5 to be connected with the driving mechanism. The pull rod 1 and the collapsible sleeve 2 are coaxially arranged, so that the stress of the collapsible sleeve 2 is balanced.

In order to realize automatic resetting of the collapsible sleeve 2, a disc spring 3 is arranged between the collapsible sleeve 2 and the positioning seat 5, and the disc spring 3 is sleeved on the outer side of the pull rod 1. When the pull rod 1 pulls the expansion sleeve 2 to move downwards, the disc spring 3 is stressed and compressed, the expansion sleeve 2 is stressed and elastically deformed, the cavity at the upper end is contracted to clamp a part to be processed, after the pull rod 1 is reset, the elastic deformation of the expansion sleeve 2 is eliminated, the inward contraction force is released, and the disc spring 3 pushes the expansion sleeve 2 to move upwards and reset.

In some embodiments, the outer side of the collapsible sleeve 2 is provided with a limiting ring 9, the upper end of the positioning seat 5 is fixedly connected with a pressing ring 4 through a screw, and the inner side of the pressing ring 4 is provided with a ring groove 8 matched with the limiting ring 9. Through setting up clamp ring 4, carry out spacing to the collapsible sleeve 2 under the cooperation of spacing ring 9 and annular 8 to avoid collapsible sleeve 2 to break away from the die cavity when going up. Preferably, when the expansion sleeve 2 is in the upward limit position, the disc spring 3 is in a compressed state. Under the action of the disc spring 3, upward thrust is applied to the collapsible sleeve 2, so that the inner caliber of the upper end of the collapsible sleeve 2 is always in an opening trend and is kept to be the largest, and the part 7 to be processed is conveniently assembled and disassembled.

Specifically, the outer wall of the collapsible sleeve 2 is sequentially provided with a first cylindrical surface 12, a second cylindrical surface 13, a third cylindrical surface 14 and a fourth cylindrical surface 15 from top to bottom, the first cylindrical surface 12 and the third cylindrical surface 14 are respectively in sliding connection with the compression ring 4 and the positioning seat 5, the second cylindrical surface 13 is positioned on the outer side of the limiting ring 9, and the diameter of the fourth cylindrical surface 15 is smaller than that of a cavity of the positioning seat 5. Preferably, the second cylindrical surface 13, the third cylindrical surface 14 and the fourth cylindrical surface 15 are transited in a descending straight step, the outer diameter of the first cylindrical surface 12 is smaller than the inner diameter of the pressing ring 4 by 0.05-0.08mm, the outer diameter of the second cylindrical surface 13 is smaller than the diameter of the ring groove 8 by 0.5-0.8mm, the third cylindrical surface 14 is smaller than the diameter of the cavity of the positioning seat 5 by 0.02-0.05mm, a trace gap is ensured to slide up and down, and the outer diameter of the fourth cylindrical surface 15 is smaller than the outer diameter of the third cylindrical surface 14 by 2-4mm, so that friction between the outer wall of the collapsible sleeve 2 and the inner wall of the cavity of the positioning seat 5 and elastic deformation of the collapsible sleeve 2 are reduced, and interference between the lower part and the cavity of the positioning seat 5 is outwards expanded.

In some embodiments, the upper end surface of the limiting ring 9 is provided with a first conical surface, a second conical surface is arranged between the annular groove 8 and the inner wall of the compression ring 4, and the included angle between the first conical surface and the axis of the expansion and contraction sleeve 2 is smaller than the included angle between the second conical surface and the axis of the compression ring 4 by 3-5 degrees.

Through setting up the first conical surface and the second conical surface that have the inclination difference, make it have certain activity allowance, when collapsible sleeve 2 goes up to extreme position, dish spring 3 is to collapsible sleeve 2 continuously exert ascending thrust, makes the inner bore of collapsible sleeve 2 upper end can be in opening trend and keep the bore biggest all the time.

In order to enable the cavity at the upper end of the collapsible sleeve 2 to have enough deformation space, the bottom of the cavity at the upper end of the collapsible sleeve 2 is upwards protruded to form a round table 11, and the round table 11 is in arc transition with the cavity wall. By arranging arc transition, deformation and fracture of the side wall of the cavity caused by stress concentration are avoided.

In some embodiments, in order to facilitate the installation and fixation of the positioning seat 5, the positioning seat further comprises a transition connecting disc 6, a concave spigot 17 is arranged in the middle of the bottom end of the positioning seat 5, a convex spigot 18 matched with the concave spigot 17 is arranged in the middle of the top end of the transition connecting disc 6, and the positioning seat 5 is fixedly connected with the transition connecting disc 6. Under the cooperation of the concave spigot 17 and the convex spigot 18, the offset or dislocation of the positioning seat 5 and the transition connecting disc 6 in the assembly process is avoided. Specifically, the outer end surface of the transition connecting disc 6 is respectively provided with a group of threaded holes and stepped holes, the number, the center distance and the size of the threaded holes are matched with those of the bolt connecting holes on the positioning seat 5 so that the positioning seat 5 and the transition connecting disc 6 are fixedly connected through bolts, and the number, the center distance and the size of the stepped holes are matched with those of the threaded holes on a machine tool workbench so that the transition connecting disc 6 is fixed on the machine tool workbench through bolts.

The working principle is that the transition connecting disc 6 is assembled with a machine tool workbench, aligned and firmly fastened and connected, and the bottom end of the pull rod 1 is connected with a hydraulic device of the machine tool;

Before the part 7 to be machined is installed, the pull rod 1 is not subjected to any external force, the disc spring 3 is in a micro-compression state, the lower end face of the expansion sleeve 2 is separated from the bottom face of the cavity of the positioning seat 5 under the action of the disc spring 3, the first conical surface at the upper part of the expansion sleeve is contacted with the second conical surface of the pressing ring 4, and under the action of the disc spring 3, the inner caliber at the upper end of the expansion sleeve 2 is always in an opening trend and the caliber is kept to be maximum, so that the part 7 to be machined is conveniently assembled and disassembled;

Placing a qualified workpiece to be machined into an upper end cavity of a collapsible sleeve 2, axially positioning the lower end surface of the workpiece 7 to be machined through a round table 11, only performing a pre-positioning function at the moment, starting a hydraulic tensioning button of a machine tool, enabling a pull rod 1 to slowly descend under the action of the hydraulic tensioning device, enabling the collapsible sleeve 2 to descend along the cavity wall of a positioning seat 5 under the action of external force of the pull rod 1, gradually compressing a disc spring 3 until the lower end surface of the collapsible sleeve 2 is attached to the bottom surface of the cavity of the positioning seat 5, stopping descending of the collapsible sleeve 2, and enabling the bottom surface of the upper end cavity of the collapsible sleeve 2 to continuously bear force along with the continuous descending of the pull rod 1, wherein the acting force is released on the outer wall of the cavity at the upper end of the collapsible sleeve 2 through a plurality of valve rib plates of the collapsible sleeve 2, and a fourth cylindrical surface 15 of the collapsible sleeve 2 is outwards expanded under the action of the external force due to the constraint of the cavity wall of the positioning seat 5, and enabling a certain annular surface 12 on the third cylindrical surface 14 of the collapsible sleeve 2 to inwards contract under the action of the external force, so that the positioning effect is achieved, and accurate positioning is achieved;

When the part 7 to be processed is processed, the hydraulic tensioning reset button is started, the axial tension borne by the expansion sleeve 2 is slowly released, the pressure borne by the disc spring 3 is gradually reduced until the pull rod 1 is restored to a natural state, at the moment, the disc spring 3 is still in a slightly compressed state, the expansion sleeve 2 is restored to a state before the workpiece is mounted, namely, the inner caliber at the upper end of the expansion sleeve 2 is in an opening trend and the caliber is kept to be maximum, so that the workpiece is taken down, and the next workpiece to be processed is mounted by repeated operation.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a quick positioning and clamping device of disk class work piece internal tooth slotting process which characterized in that includes:

The device comprises a collapsible sleeve (2), wherein a plurality of dividing grooves (16) are formed in the outer side of the collapsible sleeve (2) along the circumferential direction of the collapsible sleeve, cavities are formed in the upper end and the lower end of the collapsible sleeve (2), and the diameter of the cavity at the upper end of the collapsible sleeve (2) is matched with the diameter of the lower end of a part (7) to be processed;

The positioning seat (5), the upper portion of the positioning seat (5) is provided with a cavity matched with the collapsible sleeve (2), and the collapsible sleeve (2) is axially and slidably arranged in the cavity;

The pull rod (1) is used for pulling the expansion sleeve (2) to slide downwards and enabling the expansion sleeve to generate elastic deformation to clamp the part (7) to be processed.

2. The rapid positioning and clamping device for internal tooth slotting processing of disc workpieces, which is characterized in that a pull rod (1) and a collapsible sleeve (2) are coaxially arranged, a disc is arranged at one end of the pull rod (1), and the other end of the pull rod (1) sequentially penetrates through the collapsible sleeve (2) and a positioning seat (5) to be connected with a driving mechanism.

3. The rapid positioning and clamping device for internal tooth slotting processing of disc workpieces according to claim 1 is characterized in that a disc spring (3) is arranged between the expansion sleeve (2) and the positioning seat (5), and the disc spring (3) is sleeved on the outer side of the pull rod (1).

4. The rapid positioning and clamping device for internal tooth slotting processing of disc workpieces according to claim 3 is characterized in that a limiting ring (9) is arranged on the outer side of the expansion sleeve (2), the upper end of the positioning seat (5) is fixedly connected with a pressing ring (4), and an annular groove (8) matched with the limiting ring (9) is formed in the inner side of the pressing ring (4).

5. The rapid positioning and clamping device for internal tooth slotting machining of disc workpieces according to claim 4 is characterized in that when the expansion sleeve (2) ascends to a limit position, the disc spring (3) is in a compressed state.

6. The rapid positioning and clamping device for internal tooth slotting machining of disc workpieces according to claim 4 is characterized in that a first cylindrical surface (12), a second cylindrical surface (13), a third cylindrical surface (14) and a fourth cylindrical surface (15) are sequentially arranged on the outer wall of the expansion sleeve (2) from top to bottom, the first cylindrical surface (12) and the third cylindrical surface (14) are respectively in sliding connection with a pressing ring (4) and a positioning seat (5), the second cylindrical surface (13) is positioned on the outer side of a limiting ring (9), and the diameter of the fourth cylindrical surface (15) is smaller than that of a cavity of the positioning seat (5).

7. The rapid positioning and clamping device for internal tooth slotting processing of disc workpieces according to claim 5 is characterized in that a first conical surface is arranged on the upper end face of the limiting ring (9), a second conical surface is arranged between the annular groove (8) and the inner wall of the compression ring (4), and an included angle between the first conical surface and the axis of the expansion sleeve (2) is smaller than an included angle between the second conical surface and the axis of the compression ring (4) by 3-5 degrees.

8. The rapid positioning and clamping device for internal tooth slotting processing of disc workpieces, which is characterized in that a round table (11) is formed by upwards protruding the bottom of a cavity at the upper end of a collapsible sleeve (2), and the round table (11) is in arc transition with the wall of the cavity.

9. The rapid positioning and clamping device for internal tooth slotting machining of disc workpieces according to claim 1 is characterized by further comprising a transition connecting disc (6), wherein a concave spigot (17) is arranged in the middle of the bottom end of the positioning seat (5), a convex spigot (18) matched with the concave spigot (17) is arranged in the middle of the top end of the transition connecting disc (6), and the positioning seat (5) is fixedly connected with the transition connecting disc (6).