Axial auxiliary positioning device for workpiece multi-hole-site synchronous punching

Abstract

The axial auxiliary positioning device comprises a positioning cover body coaxially arranged on the top side of the workpiece in a sleeving mode, and an axial positioning rod vertically arranged in a driving head in a sliding and penetrating mode is axially arranged on the top side of the positioning cover body; a conical surface structure abutting against the top side of the workpiece is arranged on the inner wall of the positioning cover body, and fastening bolts capable of abutting against the side wall of the workpiece are symmetrically arranged on the side wall of the positioning cover body at intervals in a penetrating mode. The axial auxiliary positioning device can be coaxially connected with a workpiece assembled on a workpiece clamp, then axial connection with a driving head is achieved in the coaxial drilling process, then coaxial connection and guiding of the workpiece and the driving head are achieved, hole position deviation caused by workpiece clamping, driving head abrasion gaps and the like can be effectively overcome, and the machining precision is improved. Therefore, the drilling precision of the multi-shaft drilling machine is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of coaxial drilling of multiple holes, and in particular to an axial auxiliary positioning device for synchronously drilling multiple holes in a workpiece. Background Art

[0002] The drilling operation of workpieces during mechanical processing is a common and widespread processing procedure. Usually, a drilling machine can be used to perform the drilling operation of the workpiece. When the workpiece has multiple holes to be drilled, a multi-axis drilling machine is used to perform simultaneous drilling operations on multiple holes, which can effectively improve the drilling efficiency of the workpiece.

[0003] The structure of the currently used multi-axis punching machine is as shown in the attached manual. Figure 1 As shown, it includes a driving head with multiple drill bits and a workpiece fixture corresponding to the axial direction of the driving head. The driving head structure is as follows Figure 3 As shown, it is a planetary gear structure with a main driving tooth and a plurality of driven driving teeth arranged at a circumferential interval, and a drill bit is installed at the bottom of each driven driving tooth; and the workpiece fixture is usually a machine tool chuck. During the synchronous drilling operation of multiple holes, the workpiece to be drilled is axially clamped on the workpiece fixture, and the hole positions to be drilled thereon are made to correspond to the drill bit, and then the multi-axis punching machine is started to rotate, and the main driving teeth are synchronously driven to rotate each driven driving tooth, and then each drill bit is synchronously driven to rotate, and in the process of the overall downward movement of the driving head, the synchronous drilling operation of multiple holes on the clamped workpiece can be realized, and then the synchronous drilling operation of multiple holes can be realized, which can effectively improve the operational efficiency of drilling multi-hole workpieces.

[0004] Currently, when a multi-axis drilling machine is used for drilling operations, there are assembly errors in the clamping of the workpiece, the rotational wear and clearance of the main drive head, and the clamping of each drill bit. As a result, after the simultaneous drilling operation of multiple holes is achieved, there are deviations in the designed positions of the holes on the workpiece, which in turn affects the subsequent assembly and use of the workpiece and increases the scrap rate of the workpiece after drilling. Summary of the invention

[0005] In response to the above-mentioned problems, the present application aims to provide an axial auxiliary positioning device for synchronously drilling multiple holes in a workpiece, which can realize coaxial connection and guiding between the workpiece and the drive head, and can effectively overcome the hole position deviation caused by workpiece clamping and drive head wear clearance, thereby effectively improving the drilling accuracy of the multi-axis punching machine.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is as follows: an axial auxiliary positioning device for synchronously drilling multiple holes in a workpiece, wherein the synchronously drilling multiple holes in the workpiece uses a multi-axis punching machine, and the multi-axis punching machine includes a driving head with multiple drill bits, and a workpiece fixture axially corresponding to the driving head, characterized in that: the axial auxiliary positioning device is assembled on the workpiece clamped by the workpiece fixture, and the axial auxiliary positioning device is axially connected to the driving head.

[0007] Preferably, the auxiliary axial positioning device comprises a positioning cover body coaxially sleeved on the top side of the workpiece, and an axial positioning rod vertically slidably penetrated in the driving head is axially arranged on the top side of the positioning cover body.

[0008] Preferably, a conical surface structure abutting against the top side of the workpiece is provided on the inner wall of the positioning cover.

[0009] Preferably, fastening bolts capable of tightening against the side wall of the workpiece are symmetrically and spaced apart from each other on the side wall of the positioning cover.

[0010] The beneficial effect of the present application is that the axial auxiliary positioning device can be coaxially connected to the workpiece assembled on the workpiece fixture, and then during the coaxial drilling process, it can also achieve axial connection with the drive head, thereby achieving coaxial connection and guiding between the workpiece and the drive head, which can effectively overcome the hole position deviation caused by workpiece clamping and drive head wear clearance, thereby effectively improving the drilling accuracy of the multi-axis drilling machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a diagram of the local structure of a multi-axis punching machine.

[0012] Figure 2 This is a diagram of coaxial drilling and tapping of a workpiece using a multi-axis drilling machine (the left side is drilling, and the right side is continuous tapping after drilling is completed).

[0013] Figure 3 The diagram shows the structure of the drive head.

[0014] Figure 4 This is a front view structural diagram of the axial auxiliary positioning device of this application.

[0015] Figure 5 This is a top view of the structure of the axial auxiliary positioning device of this application.

[0016] Figure 6 This is a diagram showing the axial connection between the axial auxiliary positioning device of the present application and the workpiece.

[0017] Figure 7 For this application Figure 6 Illustration of the axial connection between the axial auxiliary positioning device and the drive head during drilling.

[0018] Figure 8This is a diagram showing the deflection of the axial auxiliary positioning device caused by the force transmitted by the drive head in this application.

[0019] Fig. 9 For this application, fastening bolts are provided on the positioning cover body as shown.

[0020] In the figure: 11-main driving tooth; 12-dynamic driving tooth; 13-drill bit; 1a-guide hole 3a-perforation; 60-workpiece. DETAILED DESCRIPTION

[0021] In order to enable ordinary technicians in the field to better understand the technical solution of the present application, the technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Refer to the attached Figures 1 to 9 The axial auxiliary positioning device for synchronously drilling multiple holes in a workpiece is shown, and the synchronous drilling of multiple holes in the workpiece uses a multi-axis punching machine, which includes a driving head 1 with multiple drill bits, and a workpiece fixture 2 axially corresponding to the driving head 1. During the synchronous drilling operation of multiple holes, the workpiece to be drilled is axially clamped on the workpiece fixture 2, and the driving head 1 moves downward as a whole, so that the synchronous drilling operation of multiple holes on the clamped workpiece can be realized.

[0023] In order to solve the drilling errors existing in the current multi-axis punching machines, the present application designs an axial auxiliary positioning device, which is assembled on the workpiece clamped by the workpiece fixture 2. That is, after the workpiece is clamped on the workpiece fixture 2, the axial auxiliary positioning device is coaxially connected to the workpiece, and then during the coaxial drilling process, the axial auxiliary positioning device is axially connected to the drive head 1. That is, the coaxial connection and guiding of the workpiece and the drive head 1 can be achieved through the axial auxiliary positioning device, and then the hole position deviation caused by the clamping of the workpiece and the wear clearance of the drive head 1 can be effectively overcome, thereby effectively improving the drilling accuracy of the multi-axis punching machine.

[0024] Specifically, Figure 4-6 As shown, the axial auxiliary positioning device includes a positioning cover body 3 coaxially sleeved on the top side of the workpiece, and the top side of the positioning cover body 3 is axially provided with an axial positioning rod 4 vertically slidably penetrated in the driving head 1. Among them, a guide hole matching the axial positioning rod 4 is opened in the rotating shaft of the main driving tooth, and at the same time, a through hole for the drill bit to penetrate is also opened on the positioning cover body 3. The through hole corresponds to the drill bit and can facilitate finding the hole position on the workpiece; and the through hole can also realize the axial guidance of the drill bit, solving the axial deflection when the drill bit is assembled. Preferably, the positioning cover body 3 is made of high-strength metal to overcome the wear caused by the contact between the drill bit and the inner wall of the through hole.

[0025] During operation, the positioning cover 3 is axially sleeved on the top side of the workpiece, and then the multi-axis drilling machine can be started to drive the drive head 1 to move downward as a whole. When the drill bit has not perforated a hole and has not touched the straight line on the workpiece surface, the axial positioning rod 4 is inserted into the guide hole of the rotating shaft of the driving tooth, thereby realizing coaxial guiding of the workpiece and the main drive head 1. After continuing to move downward to drill, the hole position accuracy of the workpiece can be effectively improved.

[0026] In order to eliminate the influence of the assembly gap between the positioning cover 3 and the workpiece, as Figure 4 As shown, a conical surface structure (indicated by 3b in the figure) is provided on the inner wall of the positioning cover 3 to abut against the top side of the workpiece. After the positioning cover 3 is sleeved on the workpiece, the workpiece contacts the conical surface, which can effectively eliminate the horizontal displacement gap between the two after assembly.

[0027] During the process of rotating the driving head 1 to drill a hole, a large driving force is usually generated. In order to avoid the problem that the driving head 1 is transmitted to the positioning cover 3 through the axial positioning rod 4, causing the driving head 1 to deviate from the workpiece ( Figure 8 status), such as Fig. 9 As shown, the side wall of the positioning cover 3 is symmetrically provided with fastening bolts 5 which can be tightened against the side wall of the workpiece. After the positioning cover 3 is sleeved on the top side of the workpiece, the fastening bolts 5 are rotated to contact the side wall of the workpiece to achieve assembly and fastening of the positioning cover 3 and the workpiece, thereby overcoming the problem of the positioning cover 3 and the workpiece being deflected due to the force transmitted by the driving head 1.

[0028] The principle of the present application is: during multi-hole drilling operations, first clamp the workpiece on the workpiece fixture 2, then sleeve the positioning cover 3 on the top side of the workpiece, and symmetrically tighten the fastening bolts 5, then start the multi-axis drilling machine and drive the drive head 1 downward. During the downward movement, the axial positioning rod 4 is penetrated into the guide hole of the rotating shaft of the driving tooth to achieve coaxial guiding of the workpiece and the drive head 1, and the drive head 1 is continued to be moved downward, and the drill bit is penetrated into the through hole of the positioning cover 3 to achieve coaxial guiding of the drill bit, and the drive head 1 is continued to be moved downward, and the drill bit can contact the workpiece to achieve synchronous drilling operation.

[0029] The above shows and describes the basic principles, main features and advantages of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected.

Claims

1. An axial auxiliary positioning device for synchronously drilling holes at multiple holes in a workpiece, wherein the synchronously drilling holes at multiple holes in the workpiece uses a multi-axis drilling machine, the multi-axis drilling machine comprises a driving head (1) having multiple drill bits, and a workpiece fixture (2) axially corresponding to the driving head (1), characterized in that: The axial auxiliary positioning device is mounted on a workpiece clamped by a workpiece clamp (2), and the axial auxiliary positioning device is axially connected to the drive head (1); The auxiliary axial positioning device comprises a positioning cover (3) coaxially sleeved on the top side of the workpiece, and an axial positioning rod (4) vertically slidably penetrated in the driving head (1) is axially arranged on the top side of the positioning cover (3); The inner wall of the positioning cover (3) is provided with a conical surface structure which abuts against the top side of the workpiece; Fastening bolts (5) capable of being tightened against the side wall of the workpiece are also provided at intervals and symmetrically on the side wall of the positioning cover body (3).

Images