CN112548145A

CN112548145A - Positioning fixture for drilling hole in upper end face of valve body

Info

Publication number: CN112548145A
Application number: CN202011352131.8A
Authority: CN
Inventors: 朱金华; 苏蓉; 尹宗军; 王清清
Original assignee: Anhui Institute of Information Engineering
Current assignee: Anhui Institute of Information Engineering
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-03-26

Abstract

The invention discloses a positioning fixture for drilling a hole in the upper end surface of a valve body, which comprises a base, a back plate vertically fixed on the base, and a drilling template fixed at the upper end of the back plate along the horizontal direction, wherein a drilling sleeve is detachably arranged on the drilling template, a workpiece positioned below the drilling template is arranged on the base, and clamping mechanisms positioned at two sides of the workpiece are respectively arranged on the base; the clamping mechanism comprises a push block which is arranged on the base in a sliding manner, the push block is connected with a rack through a connecting rod, a rotating shaft is rotatably arranged on the base, a gear is coaxially fixed on the rotating shaft and positioned between the two racks, the gears are respectively meshed with the two racks, and the rotating shaft can drive the two push blocks to move oppositely so as to clamp the workpiece. The positioning fixture can quickly realize positioning and clamping of the valve body on a machine tool, and improves the accuracy of drilling on the upper end face of the valve body.

Description

Positioning fixture for drilling hole in upper end face of valve body

Technical Field

The invention relates to valve body machining equipment, in particular to a positioning clamp for drilling a hole in the upper end face of a valve body.

Background

Valves are devices used to control the direction, pressure, and flow of fluid in a fluid transmission system. The valve body is an important part of the integral valve device, supports the central part, and bears partial static load and certain oil pulse impact force. The valve body part has high technical requirements on geometric shape, dimensional accuracy, position accuracy and the like, the main surface machining surface of the part is a hole with high accuracy requirement and a plane thereof, and the part comprises an inner hole, an outer circle, an end surface and the like. The valve body has two groups of processing surfaces with certain position requirements: the processing surfaces of the upper end surface and the left end surface and the processing surfaces of the lifting lug and the step surface. For the drilling process of the upper end face of the valve body, the relative position between the cutter and the workpiece can be accurately determined by guiding the cutter to process through the drill bushing, so that the method is favorable for batch production and saves labor.

Therefore, the invention provides a positioning fixture convenient for drilling on the upper end face of a valve body, which is a problem to be solved urgently.

Disclosure of Invention

The invention aims to provide a positioning fixture for drilling the upper end face of a valve body, which can quickly position and clamp the valve body on a machine tool and improve the accuracy of drilling the upper end face of the valve body.

In order to achieve the purpose, the invention provides a positioning fixture for drilling the upper end face of a valve body, which comprises a base, a back plate vertically fixed on the base, and a drilling template fixed at the upper end of the back plate along the horizontal direction, wherein a drilling sleeve is detachably arranged on the drilling template, a workpiece positioned below the drilling template is arranged on the base, and clamping mechanisms positioned at two sides of the workpiece are respectively arranged on the base;

the clamping mechanism comprises a push block which is arranged on the base in a sliding manner, the push block is connected with a rack through a connecting rod, a rotating shaft is rotatably arranged on the base, a gear is coaxially fixed on the rotating shaft and positioned between the two racks, the gears are respectively meshed with the two racks, and the rotating shaft can drive the two push blocks to move oppositely so as to clamp the workpiece.

Preferably, a dovetail groove is formed in the base, a dovetail slide block is arranged at the bottom of the push block, and the dovetail slide block is slidably clamped in the dovetail groove.

Preferably, a rubber abutting head is fixed on one surface of the push block, which is close to the workpiece.

Preferably, a limiting sleeve is fixed on the base, and the rack is at least partially slidably located in the limiting sleeve.

Preferably, a first belt wheel is coaxially fixed at the upper end of the rotating shaft, a driving motor is further fixed on the base, a second belt wheel is coaxially fixed on an output shaft of the driving motor, and the first belt wheel is connected with the second belt wheel through a belt.

Preferably, the circumferential side surfaces of the first belt wheel and the second belt wheel are respectively provided with a concave tooth structure, and the inner side surface of the belt is provided with a rack structure meshed with the concave tooth structure.

Preferably, limiting rods are respectively fixed to the two sides of the workpiece in the base, and the top ends of the two limiting rods are connected through a cross rod.

Preferably, the limiting rod is sleeved with a roller, and the roller can rotate by taking the axis of the limiting rod as an axis.

Preferably, one side of the back plate close to the workpiece is detachably provided with a touch plate.

Preferably, a rubber pad is fixed on the surface of the abutting plate.

The invention provides a positioning fixture for drilling a hole in the upper end surface of a valve body, which comprises a base, a back plate vertically fixed on the base, and a drilling template fixed at the upper end of the back plate along the horizontal direction, wherein a drilling sleeve is detachably arranged on the drilling template, a workpiece positioned below the drilling template is arranged on the base, and clamping mechanisms positioned at two sides of the workpiece are respectively arranged on the base;

the clamping mechanism comprises a push block which is arranged on the base in a sliding manner, the push block is connected with racks through a connecting rod, a rotating shaft is rotatably arranged on the base, a gear is coaxially fixed on the rotating shaft and positioned between the two racks, the gears are respectively meshed with the two racks, and the rotating shaft is rotated to drive the two push blocks to move oppositely so as to clamp the workpiece; when the positioning fixture is used, a workpiece to be machined is placed on the base, the rotating shaft is rotated to drive the two racks to move in opposite directions, the connecting rod drives the two push blocks to move in opposite directions, so that the workpiece is clamped below the drill bushing, one end of the workpiece is abutted against the back plate, and the two side faces of the workpiece are limited by the push blocks, so that the workpiece cannot deviate in the machining process.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

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 specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a block diagram of a positioning fixture provided by the present invention;

FIG. 2 is a top view of a positioning fixture provided by the present invention;

fig. 3 is a side view of a positioning jig provided by the present invention.

Description of the reference numerals

1-base 2-back plate

3-drilling template 4-drill bushing

5-touch plate 6-limiting rod

7-roller 8-workpiece

9-push block 10-cross bar

91-dovetail slider 92-dovetail groove

93-rubber contact 94-connecting rod

95-rack 96-stop collar

97-Gear 98-rotating shaft

99-Belt 910-drive Motor

911-second pulley

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1-3: the invention provides a positioning fixture for drilling a hole in the upper end surface of a valve body, which comprises a base 1, a back plate 2 vertically fixed on the base 1, and a drilling template 3 fixed on the upper end of the back plate 2 along the horizontal direction, wherein a drilling sleeve 4 is detachably arranged on the drilling template 3, a workpiece 8 positioned below the drilling template 3 is arranged on the base 1, and clamping mechanisms positioned at two sides of the workpiece 8 are respectively arranged on the base 1; the clamping mechanism comprises a pushing block 9 which is arranged on the base 1 in a sliding manner, the pushing block 9 is connected with a rack 95 through a connecting rod 94, a rotating shaft 98 is rotatably arranged on the base 1, a gear 97 is coaxially fixed on the rotating shaft 98, the gear 97 is located between the two racks 95, the gear 97 is respectively meshed with the two racks 95, and the rotating shaft 98 is rotated to drive the two pushing blocks 9 to move oppositely so as to clamp the workpiece 8. When the positioning fixture is used, a workpiece to be machined is placed on the base, the rotating shaft is rotated to drive the two racks to move in opposite directions, the connecting rod drives the two push blocks to move in opposite directions, so that the workpiece is clamped below the drill bushing, one end of the workpiece is abutted against the back plate, and the two side faces of the workpiece are limited by the push blocks, so that the workpiece cannot deviate in the machining process.

In a preferred embodiment of the present invention, in order to allow the push block to stably slide in a predetermined direction, a dovetail groove 92 is provided in the base 1, a dovetail slider 91 is provided at the bottom of the push block 9, and the dovetail slider 91 is slidably engaged in the dovetail groove 92.

In a preferred embodiment of the present invention, a rubber contact 93 is fixed to a surface of the push block 9 close to the workpiece 8, in order to effectively clamp the workpiece.

In a preferred embodiment of the present invention, in order to enable the rack 95 to stably slide along a specified direction, a stop sleeve 96 is fixed on the base 1, and the rack 95 is at least partially slidably located in the stop sleeve 96.

In a preferred embodiment of the present invention, in order to better drive the rotation shaft to rotate, a first pulley is coaxially fixed at the upper end of the rotation shaft 98, a driving motor 910 is further fixed on the base 1, a second pulley is coaxially fixed on an output shaft of the driving motor 910, and the first pulley and the second pulley 911 are connected by a belt 99.

In a preferred embodiment of the present invention, in order to increase the frictional force between the belt and the first and second pulleys, concave tooth structures are provided on circumferential side surfaces of the first and second pulleys 911, respectively, and a rack structure that engages with the concave tooth structures is provided on an inner side surface of the belt 99.

In a preferred embodiment of the present invention, in order to position both sides of a workpiece so that it can be quickly positioned with a drill bushing, a positioning rod 6 is respectively fixed in the base 1 at both sides of the workpiece 8, and the top ends of the two positioning rods 6 are connected by a cross rod 10.

In a preferred embodiment of the present invention, in order to facilitate insertion of a workpiece between two limiting rods and rapid positioning of the workpiece, a roller 7 is sleeved on the limiting rod 6, and the roller 7 can rotate by taking an axis of the limiting rod 6 as an axis.

In a preferred embodiment of the present invention, in order to enable the workpiece to be effectively abutted against the back plate 2, an abutting plate 5 is detachably provided on one side of the back plate 2 close to the workpiece 8.

In a preferred embodiment of the present invention, a rubber pad is fixed on the surface of the abutting plate 5 in order to avoid the abutting plate from impressing on the surface of the workpiece during the abutting process.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. The positioning fixture for drilling the upper end face of the valve body is characterized by comprising a base (1), a back plate (2) vertically fixed on the base (1), and a drilling template (3) fixed at the upper end of the back plate (2) along the horizontal direction, wherein a drill bushing (4) is detachably arranged on the drilling template (3), a workpiece (8) positioned below the drilling template (3) is arranged on the base (1), and clamping mechanisms positioned on two sides of the workpiece (8) are respectively arranged on the base (1);

clamping mechanism is including setting up with sliding ejector pad (9) on base (1), ejector pad (9) are connected with rack (95) through connecting rod (94), rotationally be provided with pivot (98) on base (1), coaxial fixed with gear (97) on pivot (98), gear (97) are located two between rack (95), gear (97) respectively in two rack (95) mesh mutually, rotate pivot (98) can drive two ejector pad (9) move in opposite directions, with work piece (8) press from both sides tightly.

2. The positioning fixture according to claim 1, wherein a dovetail groove (92) is formed in the base (1), a dovetail slider (91) is arranged at the bottom of the push block (9), and the dovetail slider (91) is slidably clamped in the dovetail groove (92).

3. The positioning fixture according to claim 2, characterized in that a rubber abutment (93) is fixed to one surface of the push block (9) close to the workpiece (8).

4. Positioning fixture according to claim 2, characterized in that a stop collar (96) is fixed to the base (1), the rack (95) being at least partially slidably located within the stop collar (96).

5. The positioning fixture according to claim 2, wherein a first pulley is coaxially fixed at the upper end of the rotating shaft (98), a driving motor (910) is further fixed on the base (1), a second pulley is coaxially fixed on an output shaft of the driving motor (910), and the first pulley and the second pulley (911) are connected through a belt (99).

6. The positioning clamp according to claim 5, characterized in that the circumferential sides of the first and second pulleys (911) are provided with concave tooth structures, respectively, and the inner side of the belt (99) is provided with a rack structure engaged with the concave tooth structures.

7. The positioning fixture according to claim 1, characterized in that limiting rods (6) are respectively fixed on the two sides of the workpiece (8) in the base (1), and the top ends of the two limiting rods (6) are connected through a cross rod (10).

8. The positioning fixture according to claim 7, characterized in that a roller (7) is sleeved on the limiting rod (6), and the roller (7) can rotate by taking the axis of the limiting rod (6) as an axis.

9. Positioning fixture according to claim 7, characterized in that the side of the back plate (2) close to the work piece (8) is detachably provided with an abutment plate (5).

10. Positioning fixture according to claim 9, characterized in that a rubber pad is fixed to the surface of the abutment plate (5).