Tool clamp for machining needle feeding shaft arm

Abstract

The utility model discloses a tool clamp for machining a needle feeding shaft arm, and belongs to the technical field of sewing equipment. The tool clamp for machining the needle feeding shaft arm comprises a clamp body, at least one station is arranged on the upper surface of the clamp body and comprises a receding hole, a fixing assembly and a positioning assembly, the receding hole is vertically formed in the clamp body in a penetrating mode, the fixing assembly is arranged on one side of the receding hole, and the positioning assembly is arranged on the other side of the receding hole. The positioning assembly is arranged on the other side of the receding hole. According to the tool clamp for machining the needle feeding shaft arms, the multiple fixing assemblies and the multiple positioning assemblies are arranged, the clamp fixes the multiple needle feeding shaft arms, the numerical control technology of a machining center is conveniently adopted for unified machining of multiple workpieces, a traditional machining mode is replaced, multiple procedures are completed at a time in the machining center, the product quality is consistent, and the machining efficiency is improved. The effects that the turnover time between procedures is shortened, the production efficiency is improved by 200%, and the product percent of pass can reach 99.5% are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing equipment, in particular to a tooling fixture used for processing a needle feeding shaft arm. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. Generally speaking, in a sewing machine, as a conveying device, there are various known conveying devices, such as a lower conveying device that moves along the sewing direction with the help of conveying teeth arranged below the sewing material; a needle feeding device that moves the lower conveying teeth and the needle that passes through the sewing material in synchronization with the lower conveying teeth along the sewing direction; an upper and lower conveying device that moves the conveying teeth arranged at upper and lower positions holding the sewing material along the sewing direction; and a comprehensive conveying device that is equipped with an upper and lower conveying device and a needle feeding device and transfers the sewing material by both.

[0003] The needle feed shaft arm in the conveying device (usually composed of a sleeve and a protruding connecting ring) is processed as a whole through the injection mold, but after the injection molding is completed, there will be a raised part surrounding it. Therefore, after molding, a grinder will be used to grind the surface of the pull rod. The needle feed shaft arm meets practical needs and still needs to use traditional processing procedures, such as milling, drilling, expanding, reaming, tapping, etc. before it can be used.

[0004] At present, when processing the needle feed shaft arm, since the needle feed shaft arm itself is small and there are many of them, during the processing process, the staff are required to manually place and fix the needle feed shaft arm, and then carry out a single process. After processing, the arm is transported to the next processing table for subsequent processing. Repeated manual fixation is prone to certain errors, resulting in a low workpiece qualification rate. In addition, due to the long process time of multiple process cycles, the production efficiency is also slow. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a tooling fixture for processing the needle feeding shaft arm, which has the technical effects of convenient fixing and auxiliary fixing, as well as facilitating unified processing by a CNC center and reducing errors.

[0006] In order to solve the above technical problems and achieve the above technical effects, the utility model is implemented through the following technical solutions:

[0007] 4. The repairing kit for automotive dents, according to claim 1, wherein the tooling assembly comprises a through-hole, a fixing assembly and a positioning assembly, the through-hole being vertically penetrated through the tooling assembly, the fixing assembly being arranged on one side of the through-hole, and the positioning assembly being arranged on the other side of the through-hole; the fixing assembly comprises a positioning axis, the bottom end of the positioning axis is fixedly connected to the tooling assembly body, the top end of the positioning axis is threadedly connected with a clamping screw capable of fixing the needle feeding axis arm, and a threaded hole used in conjunction with the clamping screw is provided inside the positioning axis; the positioning assembly comprises a side positioning pressure plate and a positioning bolt, the positioning bolt is vertically arranged on the tooling assembly body, and the tail end of the positioning bolt is threadedly connected to the tooling assembly body, and the side positioning pressure plate is slidably connected to the surface of the positioning bolt, and a travel groove capable of longitudinally sliding with the positioning bolt as the center is provided inside the side positioning pressure plate.

[0008] Furthermore, the clamping screw includes a screw rod and a nut, the surface of the screw rod is provided with a thread matching the threaded hole, the top of the nut is provided with a hexagonal socket, and the surface of the screw rod is provided with a washer in contact with the needle feeding shaft arm.

[0009] Furthermore, the diameter of the nut is greater than the diameter of the screw, and the length of the screw is matched with the length of the positioning axis.

[0010] Furthermore, one end of the side positioning pressing plate close to the clearance hole is arranged in a pointed shape.

[0011] Furthermore, the length of the travel groove is smaller than the length of the lateral positioning pressure plate, and the width of the travel groove is larger than the distance to the tail end of the positioning bolt and smaller than the diameter of the top end of the positioning bolt.

[0012] Furthermore, the clamp body is provided with a screw hole matched with the positioning bolt.

[0013] Furthermore, both ends of the clamp body are vertically penetrated with mounting holes, and the clamp body can be mounted on the rotating shaft of the machining center through the mounting holes.

[0014] Furthermore, the diameter of the clearance hole is greater than the diameter of the processed hole on the needle feeding shaft arm by 0.5 mm.

[0015] Furthermore, there are a plurality of workstations, and the plurality of workstations are evenly arranged along the length direction of the fixture body.

[0016] The beneficial technical effect of the utility model is that by setting multiple fixing components and positioning components, the clamp fixes multiple needle feed shaft arms, which is convenient for unified processing of multiple workpieces using the CNC technology of the machining center, replacing the traditional processing method, and realizing multiple processes to be completed in the machining center at one time, with consistent product quality, achieving the goal of reducing the turnover time between processes, thereby increasing the production efficiency by 200%, and achieving the effect of a product qualification rate of up to 99.5%, avoiding the problem that in the traditional processing process, because the needle feed shaft arms themselves are small and the number is large, the staff needs to manually clamp the needle feed shaft arms repeatedly during the processing process, which is prone to certain errors, and the multiple process cycle time is long, resulting in slow production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model for assembling the needle feeding shaft arm;

[0019] Figure 3 It is a three-dimensional schematic diagram of the structure of the needle feed shaft arm after processing;

[0020] Figure 4 It is a schematic top view of the structure of the utility model.

[0021] The numbers and letters in the figure represent the corresponding component names:

[0022] 1. Fixture body; 2. Positioning axis; 21. Threaded hole; 3. Side positioning pressure plate; 31. Travel groove; 32. Positioning bolt; 4. Clamping screw; 41. Screw rod; 42. Nut; 5. Washer; 6. Needle feeding shaft arm; 7. Clearance hole. DETAILED DESCRIPTION

[0023] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0024] See attached Figure 1-4 As shown, the tooling fixture for processing the needle feeding shaft arm of the first embodiment includes a fixture body 1, and at least one workstation is arranged on the upper surface of the fixture body 1. The workstation includes a clearance hole 7, a fixing component and a positioning component. The clearance hole 7 is vertically penetrated through the fixture body 1, the fixing component is arranged on one side of the clearance hole 7, and the positioning component is arranged on the other side of the clearance hole 7; there are a plurality of workstations, and the plurality of workstations are evenly arranged along the length direction of the fixture body 1.

[0025] The diameter of the clearance hole 7 is greater than the diameter of the machined hole on the needle feed shaft arm 6 by 0.5 mm. Both ends of the fixture body 1 are vertically penetrated with mounting holes. The fixture body 1 can be installed on the rotating shaft of the machining center through the mounting holes, and is used to match the machining center for batch processing to improve accuracy and increase processing efficiency.

[0026] The setting of multiple workstations allows the clamp to fix multiple needle feed shaft arms 6 at the same time. After the clamp is installed on the rotating shaft, it can be uniformly processed by the machining center, which increases the processing efficiency. Each needle feed shaft arm 6 only needs to be fixed once, reducing the production error of the needle feed shaft arm 6, thereby improving the pass rate of the needle feed shaft arm 6.

[0027] The fixing assembly includes a positioning axis 2, the bottom end of the positioning axis 2 is fixedly connected to the fixture body 1, the top end of the positioning axis 2 is threadedly connected with a clamping screw 4 that can install and fix the needle feeding shaft arm 6, the interior of the positioning axis 2 is provided with a threaded hole 21 used in conjunction with the clamping screw 4, the clamping screw 4 includes a screw rod 41 and a nut 42, the surface of the screw rod 41 is provided with a thread that matches the threaded hole 21, the top of the nut 42 is provided with a hexagonal socket, the surface of the screw rod 41 is sleeved with a washer 5 that contacts the needle feeding shaft arm 6, the diameter of the nut 42 is larger than the diameter of the screw rod 41, and the length of the screw 41 is adapted to the length of the positioning axis 2;

[0028] Through the set fixing component, when the needle feeding shaft arm 6 needs to be processed, the needle feeding shaft arm 6 is sleeved on the positioning axis 2, and then the clamping screw 4 is inserted into the threaded hole 21 in the positioning axis 2, and then the nut 42 is rotated to make the screw 41 cooperate with the threaded hole 21, and then the nut 42 is pressed down to make the washer 5 contact with the needle feeding shaft arm 6. Through the setting of the washer 5, when the washer 5 contacts with the needle feeding shaft arm 6, the needle feeding shaft arm 6 can be rotated to fine-tune the position through the washer 5. After the adjustment is completed, continue to twist the screw 41 on the clamping screw 4 to complete the fixation.

[0029] The positioning assembly includes a side positioning pressure plate 3 and a positioning bolt 32. The positioning bolt 32 is vertically arranged on the fixture body 1, and the tail end of the positioning bolt 32 is threadedly connected to the fixture body 1, and the side positioning pressure plate 3 is slidably connected to the surface of the positioning bolt 32. A travel groove 31 is provided inside the side positioning pressure plate 3, which can slide longitudinally with the positioning bolt 32 as the center. The length of the travel groove 31 is less than the length of the side positioning pressure plate 3, and the width of the travel groove 31 is greater than the distance between the tail ends of the positioning bolt 32 and is less than the diameter of the top end of the positioning bolt 32. A screw hole compatible with the positioning bolt 32 is provided on the fixture body 1. The end of the side positioning pressure plate 3 close to the clearance hole 7 is pointed, and the length of the travel groove 31 is less than the length of the side positioning pressure plate 3, and the width of the travel groove 31 is greater than the distance between the tail ends of the positioning bolt 32 and is less than the diameter of the top end of the positioning bolt 32.

[0030] After the needle feeding shaft arm 6 is sleeved on the positioning axis 2, the position is roughly adjusted and then fixed. The side positioning pressure plate 3 can be slid so that the side positioning pressure plate 3 slides longitudinally with the positioning bolt 32 as the center. Then the tip of the side positioning pressure plate 3 is pressed against the side of the needle feeding shaft arm 6 that needs to be processed for auxiliary positioning.

[0031] After the side positioning pressure plate 3 moves, the positioning bolt 32 is twisted so that the tail end of the positioning bolt 32 continues to penetrate into the corresponding screw hole on the clamp body 1. The positioning bolt 32 will continue to fix the side positioning pressure plate 3 downward, so that the side positioning pressure plate 3 will not be shaken during use, causing the side positioning pressure plate 3 itself to loosen, thereby increasing the accuracy of auxiliary positioning.

[0032] Before the needle feeding shaft arm 6 is installed on the fixture body 1, the large hole has been processed for sleeve installation on the positioning axis 2. After the needle feeding shaft arm 6 is sleeved on the positioning axis 2 through the large hole processed by itself, the position is initially adjusted, and then the clamping screw 4 is installed in the threaded hole 21. When the clamping screw 4 is tightened downward to a certain position, the clamping screw 4 will press the needle feeding shaft arm 6 downward and fix it, so that a certain force needs to be applied when the needle feeding shaft arm 6 rotates on the positioning axis 2. At this time, the side positioning pressure plate 3 is pushed, so that the side positioning pressure plate 3 slides on the surface of the positioning bolt 32 through the stroke groove 31, so that it is positioned in the clearance hole On one side of 7, the processed part of the needle feeding shaft arm 6 is fitted on one end of the side positioning pressure plate 3 to assist in positioning the needle feeding shaft arm 6. After fixation, continue to tighten the clamping screw 4 so that the clamping screw 4 can completely fix the needle feeding shaft arm 6. Finally, the equipment of the CNC center is used to perform milling, drilling, reaming, boring, tapping and other processes on the processed part of the needle feeding shaft arm 6 at one time. There is no need to carry out the process turnover of the needle feeding shaft arm 6 step by step, which increases the production efficiency. The arrangement of multiple fixing components, multiple make way holes 7 and multiple positioning components enables the needle feeding shaft arm 6 on the fixture body 1 to be installed with multiple as needed.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A fixture for processing a needle feeding shaft arm, characterized in that: include: A clamp body (1), wherein at least one workstation is arranged on the upper surface of the clamp body (1), the workstation comprising a clearance hole (7), a fixing component and a positioning component, the clearance hole (7) is vertically penetrated and opened in the clamp body (1), the fixing component is arranged on one side of the clearance hole (7), and the positioning component is arranged on the other side of the clearance hole (7); The fixing assembly comprises a positioning shaft (2), the bottom end of the positioning shaft (2) is fixedly connected to the clamp body (1), the top end of the positioning shaft (2) is threadedly connected to a clamping screw (4) capable of fixing the needle feeding shaft arm (6), and a threaded hole (21) for use with the clamping screw (4) is provided inside the positioning shaft (2); The positioning assembly comprises a lateral positioning pressure plate (3) and a positioning bolt (32), wherein the positioning bolt (32) is vertically arranged on the clamp body (1), and the tail end of the positioning bolt (32) is threadedly connected to the clamp body (1), and the lateral positioning pressure plate (3) is slidably connected to the surface of the positioning bolt (32), and a travel groove (31) capable of longitudinal sliding with the positioning bolt (32) as the center is opened inside the lateral positioning pressure plate (3).

2. The fixture for processing the needle feeding shaft arm according to claim 1, characterized in that: The clamping screw (4) comprises a screw rod (41) and a nut (42); a thread matching the threaded hole (21) is formed on the surface of the screw rod (41); a hexagonal socket is formed on the top of the nut (42); and a washer (5) in contact with the needle feeding shaft arm (6) is sleeved on the surface of the screw rod (41).

3. The fixture for processing the needle feeding shaft arm according to claim 2, characterized in that: The diameter of the nut (42) is greater than the diameter of the screw rod (41), and the length of the screw rod (41) is adapted to the length of the positioning axis (2).

4. The fixture for processing the needle feeding shaft arm according to claim 2, characterized in that: One end of the side positioning pressing plate (3) close to the clearance hole (7) is arranged in a pointed shape.

5. The fixture for processing the needle feeding shaft arm according to claim 1, characterized in that: The length of the travel groove (31) is smaller than the length of the lateral positioning pressure plate (3), and the width of the travel groove (31) is larger than the distance to the rear end of the positioning bolt (32) and smaller than the diameter of the top end of the positioning bolt (32).

6. The fixture for processing the needle feeding shaft arm according to claim 1, characterized in that: The clamp body (1) is provided with a screw hole matched with the positioning bolt (32).

7. The fixture for processing the needle feeding shaft arm according to claim 6, characterized in that: Both ends of the clamp body (1) are provided with mounting holes extending vertically therethrough, and the clamp body (1) can be mounted on a rotating shaft of a machining centre through the mounting holes.

8. The fixture for processing the needle feeding shaft arm according to claim 1, characterized in that: The diameter of the clearance hole (7) is greater than the diameter of the processed hole on the needle feeding shaft arm (6) by 0.5 mm.

9. The fixture for processing the needle feeding shaft arm according to claim 1, characterized in that: A plurality of the workstations are provided, and the plurality of workstations are evenly arranged along the length direction of the clamp body (1).

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