Pin drawing mechanism of machining clamp

Abstract

The utility model discloses a machining clamp pin drawing mechanism, which relates to the technical field of clamps, and comprises a workbench and a pin drawing mechanism, the workbench is provided with a supporting seat, a workpiece is placed on the supporting seat, the pin drawing mechanism comprises a plug pin movably inserted in the supporting seat, the plug pin is provided with a conical section with a conical surface, and the workpiece is provided with a through hole to be machined. When a workpiece is placed on the supporting base, the conical section is inserted into the through hole, hole positioning is achieved through the conical section and the through hole, the situation of pin clamping after hole positioning can be avoided, the outer wall of the conical section elastically abuts against the inner wall of the through hole, hard contact between a plug pin and the workpiece can be avoided, a certain hole position error can be allowed, and damage to the workpiece is avoided. The pin drawing mechanism is provided with a pin drawing cylinder, the pin drawing cylinder can drive the plug pin to be drawn out of the through hole, and the through hole can be machined after the drawing pin is drawn out.

Description

Technical Field

[0001] The utility model relates to the technical field of jigs, and particularly relates to a pin-pulling mechanism for a machining jig. Background Art

[0002] In the field of machining, rough holes of parts need to be semi-finished or finish-machined. During the clamping process before machining, the hole positions need to be positioned. Currently, extractable positioning pins are used to cooperate with the rough holes to be machined for positioning. However, the rough holes have large errors. When positioning multiple holes simultaneously, due to the distance errors between adjacent holes, it is easy to cause pin jamming. Individual positioning pins are difficult to extract from the rough holes, affecting production efficiency. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a pin-pulling mechanism for a machining jig, which can avoid pin jamming and improve production efficiency.

[0004] A pin-pulling mechanism for a machining jig according to an embodiment of the utility model includes:

[0005] A workbench is provided with a support base, and a workpiece is placed on the support base;

[0006] The pin-pulling mechanism includes a pin movably inserted into the support base. The pin is provided with a tapered section having a tapered surface. The workpiece has a through hole to be machined. When the workpiece is placed on the support base, the tapered section is inserted into the through hole, and the outer wall of the tapered section elastically abuts against the inner wall of the through hole. The pin-pulling mechanism is provided with a pin-pulling cylinder, and the pin-pulling cylinder can drive the pin to be pulled out of the through hole.

[0007] A pin-pulling mechanism for a machining jig according to an embodiment of the utility model has at least the following beneficial effects: This embodiment is provided with a workbench and a pin-pulling mechanism. The workbench is provided with a support base, and a workpiece is placed on the support base. The pin-pulling mechanism includes a pin movably inserted into the support base. The pin is provided with a tapered section having a tapered surface. The workpiece has a through hole to be machined. When the workpiece is placed on the support base, the tapered section is inserted into the through hole. The hole is positioned by the tapered section and the through hole, which can avoid pin jamming after hole positioning. Moreover, the outer wall of the tapered section elastically abuts against the inner wall of the through hole, which can avoid hard contact between the pin and the workpiece, allow a certain hole position error, and avoid damaging the workpiece. The pin-pulling mechanism is provided with a pin-pulling cylinder, and the pin-pulling cylinder can drive the pin to be pulled out of the through hole. After the pin is pulled out, the through hole can be machined.

[0008] According to some embodiments of the utility model, the pin-pulling mechanism is provided with an elastic member and a connecting block. The pin is movably inserted into the connecting block. Two ends of the elastic member respectively elastically press against the connecting block and the pin. One end of the connecting block is fixedly connected to the piston rod of the pin-pulling cylinder.

[0009] According to some embodiments of the present invention, the latch is provided with an abutment portion, and one end of the elastic member presses against the abutment portion toward the side wall of the connecting block, so that the latch remains elastically extended.

[0010] According to some embodiments of the utility model, one end of the bolt that is plugged into the connecting block is connected to a fixing piece, and the fixing piece can be adjusted in the installation position on the bolt along the axial direction of the bolt.

[0011] According to some embodiments of the present invention, a receiving cavity is provided in the connection block, and the fixing member can move in the receiving cavity.

[0012] According to some embodiments of the utility model, the latch includes a movable section, the movable section is movably inserted in the support seat, and the outer diameter of the movable section is larger than the inner diameter of the through hole.

[0013] According to some embodiments of the present invention, a support column is provided on the workbench, and the support column supports the workpiece toward the bottom wall of the workbench.

[0014] According to some embodiments of the utility model, a hinged clamping block is provided on the workbench, and a clamping cylinder is provided on the workbench. The clamping cylinder can drive the clamping block to press the workpiece.

[0015] According to some embodiments of the utility model, the clamping block includes a hinged portion, a pressure contact portion and a power portion, the power portion is connected to the end of the piston rod of the clamping cylinder, the hinged portion is hinged to the workbench, and when the clamping cylinder pushes the power portion, the pressure contact portion presses against the outer wall of the workpiece away from the workbench.

[0016] According to some embodiments of the utility model, the connection block has a connection portion for inserting a bolt, and when the pin-pulling cylinder pulls the connection block, the fixing member abuts against the side wall of the connection portion to pull the bolt.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is an axonometric view of a pin extraction mechanism of a machining fixture in an embodiment of the utility model;

[0020] Figure 2 A cross-sectional view of a pin extraction mechanism of a machining fixture in an embodiment of the utility model;

[0021] Figure 3 for Figure 2 A magnified view of center A;

[0022] Figure 4 For Figure 2 an enlarged view of B in

[0023] Figure 5 For Figure 2 an enlarged view of C in

[0024] Reference numerals:

[0025] Workbench 100; support base 101; workpiece 102; through hole 103; clamping block 104; support column 105; hinge portion 106; pressing contact portion 107; power portion 108; clamping cylinder 109;

[0026] Pin extraction mechanism 110; pin 111; movable section 112; tapered section 113; fixing member 114; connecting block 115; accommodating cavity 116; connecting portion 117; elastic member 118; abutting portion 119; pin extraction cylinder 120. Detailed implementation manners

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or the sequence of the indicated technical features.

[0030] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0031] Refer to Figures 1 to 5, in a pin-pulling mechanism of a machining fixture according to an embodiment of the present invention, it includes a workbench 100 and a pin-pulling mechanism 110. The workbench 100 is provided with a support base 101, and a workpiece 102 is placed on the support base 101. The pin-pulling mechanism 110 includes a pin 111 that is movably inserted into the support base 101. The pin 111 is provided with a tapered section 113 having a tapered surface. The workpiece 102 has a through hole 103 to be machined. When the workpiece 102 is placed on the support base 101, the tapered section 113 is inserted into the through hole 103, and the hole positioning is realized through the tapered section 113 and the through hole 103, which can avoid the situation of pin jamming after hole positioning. Moreover, the outer wall of the tapered section 113 elastically abuts against the inner wall of the through hole 103, which can avoid hard contact between the pin 111 and the workpiece 102, allow a certain hole position error, and avoid damaging the workpiece 102. The pin-pulling mechanism 110 is provided with a pin-pulling cylinder 120, and the pin-pulling cylinder 120 can drive the pin 111 to be withdrawn from the through hole 103. After the pin is withdrawn, the through hole 103 can be machined.

[0032] Furthermore, the pin-pulling mechanism 110 is provided with an elastic member 118 and a connecting block 115. The pin 111 is movably inserted into the connecting block 115. The two ends of the elastic member 118 elastically press against the connecting block 115 and the pin 111 respectively. One end of the connecting block 115 is fixedly connected to the piston rod of the pin-pulling cylinder 120. It can be understood that the pin-pulling mechanism 110 is located below the workpiece 102. By driving the connecting block 115 through the pin-pulling cylinder 120, the pin-pulling function can be realized when driving the pin 111 to move downward. Further, the pin 111 is provided with an abutting portion 119, and one end of the elastic member 118 presses against the side wall of the abutting portion 119 facing the connecting block 115, so that the pin 111 remains elastically extended. At the same time, one end of the pin 111 inserted into the connecting block 115 is connected with a fixing member 114. Along the axial direction of the pin 111, the installation position of the fixing member 114 on the pin 111 can be adjusted. Therefore, the two ends of the elastic member 118 respectively abut against the fixing member 114 and the abutting portion 119, realizing the tendency of the pin 111 to remain extended toward the workpiece 102. Moreover, the connecting block 115 has a receiving cavity 116, and the fixing member 114 can move in the receiving cavity 116, thereby allowing the pin 111 and the fixing member 114 to move up and down in the connecting block 115. It can be understood that the elastic member 118 is a helical spring.

[0033] It can be understood that the connecting block 115 has a connecting portion 117 for inserting the pin 111. When the pin-pulling cylinder 120 pulls the connecting block 115, the fixing member 114 abuts against the side wall of the connecting portion 117 facing the receiving cavity 116, realizing pulling the pin 111 to move downward, thereby completing the pin-pulling function.

[0034] Furthermore, the latch 111 includes a movable section 112, which is movably inserted in the support seat 101. The outer diameter of the movable section 112 is larger than the inner diameter of the through hole 103, thereby ensuring that during the positioning process, the outer wall surface of the cone section 113 can abut against the inner wall of the end of the through hole 103, thereby achieving accurate positioning, and when multiple latches 111 are positioned with multiple through holes 103, it can avoid the through holes 103 and the latch 111 being stuck due to the position error of the through holes 103, making it difficult to pull out the pin.

[0035] Furthermore, a clamping block 104 is hingedly mounted on the workbench 100, and a clamping cylinder 109 is provided on the workbench 100. The clamping cylinder 109 is located below the workpiece 102, and the clamping cylinder 109 can drive the clamping block 104 to clamp the workpiece 102. Further, the clamping block 104 includes a hinged portion 106, a pressure contact portion 107, and a power portion 108. The power portion 108 is movably connected to the end of the piston rod of the clamping cylinder 109. The hinged portion 106 is hinged to the workbench 100. When the clamping cylinder 109 pushes the power portion 108, the pressure contact portion 107 presses against the outer wall of the workpiece 102 away from the workbench 100. Furthermore, a support column 105 is provided on the workbench 100, and a plurality of support columns 105 are provided, and the plurality of support columns 105 are located on the periphery of the clamping block 104. During the clamping process, the support columns 105 are supported on the workpiece 102 toward the bottom wall of the workbench 100, thereby facilitating improving the clamping stability of the workpiece 102.

[0036] It can be understood that during the loading process, the tapered section 113 of the pin 111 protrudes from the support seat 101. When the workpiece 102 is placed, the through hole 103 and the workpiece 102 are positioned by inserting the tapered section 113 into the through hole 103. Then the clamping cylinder 109 drives the clamping block 104 to clamp the workpiece 102. At this time, the pin extraction cylinder 120 drives the pin 111 to move downward, so that the tapered section 113 is disengaged from the through hole 103, thereby completing the pin extraction.

[0037] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pin extraction mechanism for a machining fixture, characterized in that: include: A workbench is provided with a support base, on which a workpiece is placed; The pin-pulling mechanism comprises a pin movably inserted into the support seat, the pin is provided with a tapered section having a tapered surface, the workpiece has a through hole to be processed, the tapered section is inserted into the through hole when the workpiece is placed on the support seat, and the outer wall of the tapered section elastically abuts against the inner wall of the through hole, the pin-pulling mechanism is provided with a pin-pulling cylinder, and the pin-pulling cylinder can drive the pin to be pulled out of the through hole.

2. A pin extraction mechanism for a machining fixture according to claim 1, characterized in that: The pin-pulling mechanism is provided with an elastic member and a connecting block, the latch is movably plugged into the connecting block, two ends of the elastic member elastically press the connecting block and the latch respectively, and one end of the connecting block is fixedly connected to the piston rod of the pin-pulling cylinder.

3. A pin extraction mechanism for a machining fixture according to claim 2, characterized in that: The latch is provided with an abutment portion, and one end of the elastic member is pressed against the abutment portion toward the side wall of the connecting block, so that the latch remains elastically extended.

4. A pin extraction mechanism for a machining fixture according to claim 2, characterized in that: One end of the plug that is plugged into the connection block is connected with a fixing piece, and the fixing piece can adjust the installation position on the plug along the axis direction of the plug.

5. A pin extraction mechanism for a machining fixture according to claim 4, characterized in that: The connection block has a receiving cavity therein, and the fixing member can move in the receiving cavity.

6. A pin extraction mechanism for a machining fixture according to claim 1, characterized in that: The latch includes a movable section, which is movably inserted into the support seat, and the outer diameter of the movable section is larger than the inner diameter of the through hole.

7. The pin extraction mechanism for a machining fixture according to claim 1, characterized in that: The workbench is provided with a supporting column, and the supporting column is supported on the workpiece toward the bottom wall of the workbench.

8. The pin extraction mechanism for a machining fixture according to claim 1, characterized in that: The workbench is provided with a hinged clamping block, and the workbench is provided with a clamping cylinder, and the clamping cylinder can drive the clamping block to press the workpiece.

9. A pin extraction mechanism for a machining fixture according to claim 8, characterized in that: The clamping block includes an articulated portion, a pressure contact portion and a power portion, wherein the power portion is connected to the end of a piston rod of the clamping cylinder, and the articulated portion is hinged to the workbench. When the clamping cylinder pushes the power portion, the pressure contact portion presses against an outer wall of the workpiece away from the workbench.

10. The pin extraction mechanism for a machining fixture according to claim 4, characterized in that: The connecting block has a connecting portion for inserting the latch, and when the pin-pulling cylinder pulls the connecting block, the fixing member abuts against the side wall of the connecting portion to pull the latch.

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