CN210189113U

CN210189113U - Positioning fixture with high machining size consistency

Info

Publication number: CN210189113U
Application number: CN201921202825.6U
Authority: CN
Inventors: Shounan Li; 黎寿南
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-03-27
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a positioning fixture with high consistency of machining size, belonging to the technical field of machining and solving the problem that the consistency of the machining size of a workpiece is easily influenced by the gap between the workpiece and a supporting surface; the positioning fixture comprises a tooling base, wherein a positioning mechanism and a supporting mechanism are arranged on the tooling base, the positioning fixture further comprises a supporting seat, a stand column and a control mechanism for adjusting the height of the stand column, the supporting seat is fixed on the top surface of the tooling base, the stand column slides through the supporting seat and is connected with the control mechanism, and the control mechanism is arranged in the tooling base. The utility model discloses can the only fixed position of confirming the work piece to improve the machining dimension's of work piece uniformity.

Description

Positioning fixture with high machining size consistency

Technical Field

The utility model relates to a machining technical field, more specifically say, especially relate to a positioning fixture that machining size uniformity is high.

Background

In machining, a workpiece is usually positioned in a mode of one surface and two pins, a supporting surface and two pin mounting holes are arranged on a positioning tool, the position of the workpiece is supported by the supporting surface, the workpiece is fixed on the supporting surface through a corresponding clamping mechanism, two machining process holes are formed in the workpiece, and the relative position of the workpiece on the supporting surface is positioned by two positioning pins. Due to the fact that the contact area of the workpiece and the supporting surface is too large, a gap can be formed in the contact position of the workpiece and the supporting surface in the clamping process, if the clamping force is too large, the workpiece can be deformed, and if the clamping force is too small, the position of the workpiece in the machining process cannot be well fixed. In addition, because a gap exists between the workpiece and the supporting surface, the position of the workpiece on the supporting surface cannot be uniquely determined, and the workpiece can slightly move on the supporting surface in the machining process, so that the consistency of the machining size of the workpiece is influenced. When the workpiece is loose, the machining dimension is deviated due to the deformation of the workpiece. Therefore, it is necessary to design a positioning jig with high machining dimensional uniformity.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a positioning fixture that machining size uniformity is high utilizes this positioning fixture can the unique locating position who confirms the work piece to improve the machining size's of work piece uniformity.

The utility model adopts the technical scheme as follows:

the utility model provides a positioning fixture that machining size uniformity is high, includes fixture base, last positioning mechanism and the supporting mechanism of being provided with of fixture base still includes supporting seat, stand and is used for adjusting the control mechanism of stand height, the supporting seat is fixed on the fixture base top surface, the stand slides and passes the supporting seat with control mechanism is connected, control mechanism arranges in the fixture base.

Further, the control mechanism comprises a wedge block connected with the bottom of the upright column and a pull rod inserted into the side face of the tool base, one side of the pull rod is connected with the wedge block, a spring is sleeved on one side, close to the wedge block, of the periphery of the pull rod, and an inclined face matched with the inclined face of the wedge block is arranged at the bottom of the upright column.

Furthermore, a limiting groove is formed in the inclined surface of the wedge block, and a limiting block matched with the limiting groove is arranged on the inclined surface.

Furthermore, the highest end of the inclined plane of the wedge block is provided with a clamping part, the clamping part is provided with a groove and an opening which are connected along the radial direction, one side of the pull rod is provided with a boss, and the boss penetrates through the opening to be inserted into the groove.

Furthermore, a plurality of pin holes distributed at intervals are formed in the pull rod, the pin holes are separated from the spring through gaskets, and the gaskets are fixed on the side faces of the tooling base.

Further, a hand wheel is arranged on the other side of the pull rod.

Further, still be provided with on the frock base with the corresponding mechanism of pushing away of positioning mechanism pushes away by the mechanism, push away by the mechanism and include L shaped plate and locking screw, an edge of L shaped plate is fixed in on the frock base top surface, locking screw connect soon in another edge of L shaped plate.

Further, the positioning mechanism comprises a cylindrical pin and a diamond-shaped pin which are fixed with the tool base.

Further, the supporting mechanism comprises three positioning blocks fixed to the tool base, and each positioning block is provided with two fixing holes parallel to each other.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

(1) the utility model discloses a positioning fixture that machining size uniformity is high utilizes positioning mechanism and supporting mechanism to cooperate, can effectively fix the position of work piece, utilizes to push away by the mechanism, can follow the work piece side direction and provide the locking force, effectively eliminates the clearance between the processing technology hole on locating pin and the work piece, improves work piece location accuracy.

(2) In addition, the supporting mechanism consists of three positioning blocks, an upright post, a supporting seat and a control mechanism, the control mechanism can effectively eliminate a fixed gap between the workpiece and the supporting mechanism, and the control mechanism can effectively control the upright post to move up and down, so that the position of the upright post can be conveniently adjusted.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the fitting structure of the present invention;

FIG. 3 is a cross-sectional enlarged schematic view of the control mechanism of FIG. 1;

FIG. 4 is an enlarged schematic view of the column of FIG. 3;

FIG. 5 is an enlarged schematic view of the wedge of FIG. 3;

FIG. 6 is an enlarged schematic view of the positioning block of FIG. 1;

in the figure, 1, a tool base, 2, an L-shaped plate, 3, a locking screw, 4, a cylindrical pin, 5, a diamond-shaped pin, 6, a pull rod, 61, a boss, 62, a pin hole, 63, a hand wheel, 7, an upright post, 71, an inclined surface, 72, a limiting block, 8, a supporting seat, 9, a positioning block, 91, a fixing hole, 10, a workpiece, 11, a wedge block, 11a, a limiting groove, 11b, a clamping part, 111, a groove, 112, an opening, 12, a spring, 13 and a gasket.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the following detailed description, but the present invention is not limited thereto.

Referring to fig. 1 to 6, the utility model discloses a positioning fixture that machining size uniformity is high, including fixture base 1, fixture base 1 is last to be provided with positioning mechanism and supporting mechanism, still includes supporting seat 8, stand 7 and is used for adjusting the control mechanism of stand 7 height, and supporting seat 8 is fixed on fixture base 1 top surface, and stand 7 slides and passes supporting seat 8 and be connected with control mechanism, and control mechanism arranges in fixture base 1. The positioning mechanism is used for positioning the position of the workpiece 10 on the tool base 1, the bottom surface of the workpiece 10 is effectively supported through the supporting mechanism, and the height of the supporting point is adjusted through the upright post 7 and the control mechanism, so that the workpiece 10 is supported without clearance.

The control mechanism comprises a wedge block 11 connected with the bottom of the upright post 7 and a pull rod 6 inserted into the side face of the tool base 1, one side of the pull rod 6 is connected with the wedge block 11, a spring 12 is sleeved on one side, close to the wedge block 11, of the periphery of the pull rod 6, and an inclined surface 71 matched with the inclined surface of the wedge block 11 is arranged at the bottom of the upright post 7. The height of the upright post 7 is effectively adjusted through the control mechanism, meanwhile, in the machining process of the workpiece 10, the position of the upright post 7 is fixed, the height of the upright post 7 is adjusted, meanwhile, the position of the upright post 7 is locked, the wedge block 11 is pushed to move inwards by the aid of elasticity of the spring 12, and then the upright post 7 is driven to move upwards to the bottom face of the workpiece 10.

The inclined surface of the wedge 11 is provided with a limit groove 11a, and the inclined surface 71 is provided with a limit block 72 matched with the limit groove 11 a. Through the cooperation of spacing groove 11a and stopper 72, when realizing the motion of stand 7, pass through the auto-lock with the position of stand 7 fixed, in the course of working of work piece 10, realize the effective support to work piece 10.

The highest end of the inclined plane of the wedge block 11 is provided with a clamping part 11b, the clamping part 11b is provided with a groove 111 and an opening 112 which are connected along the radial direction, one side of the pull rod 6 is provided with a boss 61, and the boss 61 penetrates through the opening 112 to be inserted into the groove 111. The boss 61 is placed in the groove 111 to realize the buckling between the pull rod 6 and the wedge block 11.

The pull rod 6 is provided with a plurality of pin holes 62 distributed at intervals, the pin holes 62 are separated from the spring 12 through a gasket 13, and the gasket 13 is fixed on the side face of the tooling base 1. The position of the pull rod 6 can be fixed by placing a pin in the pin hole 62, and after the pin is taken down, the wedge block 11 moves inwards by utilizing the elasticity of the spring 12 to push the upright post 7 to move upwards to the bottom surface of the workpiece 10, so that the position of the upright post 7 can be adjusted.

Preferably, a hand wheel 63 is arranged on the other side of the pull rod 6, so that the pull rod 6 can be pulled conveniently.

Preferably, the tool base 1 is further provided with a pushing mechanism corresponding to the positioning mechanism, the pushing mechanism comprises an L-shaped plate 2 and a locking screw 3, one edge of the L-shaped plate 2 is fixed on the top surface of the tool base 1, and the locking screw 3 is screwed on the other edge of the L-shaped plate 2. The locking force can be provided for the workpiece 10 from the side surface, the gap between the positioning pin on the positioning mechanism and the processing process hole on the workpiece 10 is effectively eliminated, and the positioning accuracy of the workpiece 10 is improved.

Preferably, the positioning mechanism comprises a cylindrical pin 4 and a diamond-shaped pin 5 which are fixed with the tool base 1, the supporting mechanism comprises three positioning blocks 9 which are fixed with the tool base 1, and each positioning block 9 is provided with two fixing holes 91 which are parallel to each other.

When the positioning clamp is used, the three positioning blocks 9 are fixed with the tool base 1 through screws, the workpiece 10 is positioned and placed on the top surface of the positioning blocks 9 through the positioning mechanism by utilizing the matching between the cylindrical pin 4 and the diamond-shaped pin 5 on the positioning mechanism and the processing process holes on the workpiece 10, the pin on the pull rod 6 is taken down, the wedge block 11 is pushed to move inwards by utilizing the elasticity of the spring 12 until the top surface of the upright post 7 contacts the bottom surface of the workpiece 10 to support the workpiece 10, the clamping screw is screwed at the position, corresponding to the supporting surface of the workpiece 10, of the top surface of the workpiece 10, the workpiece 10 is fixed on the supporting mechanism, the locking screw 3 on the pushing mechanism is screwed, and the positioning and clamping of the workpiece 10 are.

The above description is only for the preferred embodiment of the present invention, and all modifications, equivalents, improvements and the like made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a positioning fixture that machining size uniformity is high, includes fixture base (1), be provided with positioning mechanism and supporting mechanism on fixture base (1), its characterized in that: the tool base is characterized by further comprising a supporting seat (8), an upright post (7) and a control mechanism for adjusting the height of the upright post (7), wherein the supporting seat (8) is fixed on the top surface of the tool base (1), the upright post (7) penetrates through the supporting seat (8) in a sliding mode and is connected with the control mechanism, and the control mechanism is arranged in the tool base (1).

2. The positioning fixture with high machining size consistency according to claim 1, characterized in that: control mechanism include with wedge block (11) that stand (7) bottom links to each other and alternate in pull rod (6) of frock base (1) side department, pull rod (6) one side with wedge block (11) link to each other, pull rod (6) periphery is close to wedge block (11) one side cover is equipped with spring (12), stand (7) bottom be provided with inclined plane (71) of the inclined plane looks adaptation of wedge block (11).

3. The positioning fixture with high machining size consistency according to claim 2, characterized in that: the wedge block is characterized in that a limiting groove (11a) is formed in the inclined surface of the wedge block (11), and a limiting block (72) matched with the limiting groove (11a) is arranged on the inclined surface (71).

4. The positioning fixture with high machining size consistency according to claim 2, characterized in that: the wedge block is characterized in that the highest end of the inclined surface of the wedge block (11) is provided with a clamping part (11b), the clamping part (11b) is provided with a groove (111) and an opening (112) which are connected in the radial direction, one side of the pull rod (6) is provided with a boss (61), and the boss (61) penetrates through the opening (112) and is inserted into the groove (111).

5. The positioning fixture with high machining size consistency according to claim 2, characterized in that: a plurality of pin holes (62) distributed at intervals are formed in the pull rod (6), the pin holes (62) are separated from the spring (12) through a gasket (13), and the gasket (13) is fixed on the side face of the tooling base (1).

6. The positioning fixture with high machining size consistency according to claim 2, characterized in that: and a hand wheel (63) is arranged on the other side of the pull rod (6).

7. The positioning fixture with high machining dimensional consistency according to any one of claims 1 to 6, characterized in that: still be provided with on frock base (1) with the corresponding mechanism of pushing away pushes away by the mechanism, push away by the mechanism and include L shaped plate (2) and locking screw (3), an edge of L shaped plate (2) is fixed in on frock base (1) top surface, locking screw (3) connect soon in another edge of L shaped plate (2).

8. The positioning fixture with high machining size consistency according to claim 1, characterized in that: the positioning mechanism comprises a cylindrical pin (4) and a diamond-shaped pin (5) which are fixed with the tool base (1).

9. The positioning fixture with high machining size consistency according to claim 1, characterized in that: the supporting mechanism comprises three positioning blocks (9) fixed with the tool base (1), and each positioning block (9) is provided with two fixing holes (91) which are parallel to each other.