Internal thread returning equipment

Abstract

The utility model belongs to the technical field of machinery, and relates to internal thread returning equipment which comprises a workbench, a motor arranged on the workbench, a screw tap in transmission connection with the motor, a position sensor pointing to the tail part of a working section of the screw tap, and roller assemblies arranged on the workbench in parallel, a workpiece with a nut to be machined is arranged on the workbench in a sliding mode and clamped between the rolling wheel assemblies. And the screw tap interferes with an internal thread in the to-be-machined nut, so that thread returning repair is carried out in the rotating process, and the workpiece is pulled inwards. Compared with the prior art, the production efficiency is improved, and the production cost and the labor intensity of workers are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to an internal thread return device. Background Art

[0002] A nut is a common fastener used to fix a bolt or screw. It is usually a hexagonal or round metal part with an internal threaded hole. The function of the nut is to cooperate with the bolt or screw to achieve the function of fastening and fixing by rotation. In order to improve the corrosion resistance of the nut, the nut is processed by hot-dip galvanizing. Hot-dip galvanizing is to immerse the metal product in molten zinc so that the zinc forms a layer of zinc-iron alloy or pure zinc on the metal surface. This coating can provide effective anti-corrosion protection and prevent the metal product from being affected by oxidation and corrosion.

[0003] However, during the hot-dip galvanizing process, the galvanized layer is easily too thick, which makes it difficult to assemble with parts such as screws. In this case, it is usually necessary to perform thread resetting on the original thread processing equipment. The existing thread resetting repair method includes manual thread resetting with a tap. However, due to the large thread size, manual thread resetting requires a lot of effort, resulting in high work intensity and low work efficiency for workers, which cannot meet production requirements. Utility Model Content

[0004] The purpose of the utility model is to provide an internal thread re-threading device which can effectively reduce labor costs.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] An internal thread back-threading device comprises a workbench, a motor arranged on the workbench, a tap connected to the motor by transmission, a position sensor pointing to the tail of the working section of the tap, and a roller assembly arranged in parallel on the workbench;

[0007] A workpiece having a nut to be processed is slidably disposed on a workbench and clamped between roller assemblies;

[0008] The tap interferes with the internal thread in the nut to be processed so that the thread is re-threaded and repaired during the rotation process, and the workpiece is pulled inward.

[0009] The position sensor is electrically connected to the motor and is used to detect the position of the workpiece.

[0010] Furthermore, the motor is a gear reduction motor.

[0011] Furthermore, the gear reduction motor is fixed on the workbench by motor bolts.

[0012] Furthermore, a center hole is opened on the end of the transmission shaft of the motor, and the tail end of the tap is embedded in the center hole and fixed by a transmission shaft bolt passing through the side wall of the center hole.

[0013] Furthermore, a plurality of transmission shaft bolts are provided on the transmission shaft of the motor.

[0014] Furthermore, the workbench is provided with a workpiece slide, the workpiece is slidably arranged on the workpiece slide, and the roller assembly is arranged on the workpiece slide.

[0015] Furthermore, the workpiece slide has a slide plate, and a vertical plate arranged between the front side of the slide plate and the workbench, and between the rear side of the slide plate and the workbench.

[0016] Furthermore, the roller assembly includes a bearing shaft erected on a workbench, bearings sleeved on the bearing shaft one above and one below, and a roller sleeved outside the bearing.

[0017] Furthermore, the roller assembly also includes a threaded column arranged at the top end of the bearing shaft, a nut arranged on the threaded column, and a flat gasket arranged between the nut and the top side of the roller.

[0018] Furthermore, the workbench includes a base frame and a support plate arranged on the base frame.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model fixes the tap on the motor transmission shaft and realizes the automatic thread return and repair of the internal thread by using the screwing cooperation between the rotating tap and the internal thread of the nut; and uses the position sensor to detect the screwing degree of the nut and stop the processing in time; in addition, the workpiece can be returned by reversing the motor to facilitate the processing of the next workpiece. Therefore, the utility model is conducive to improving production efficiency, reducing production costs and labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an internal thread back-threading device in the embodiment;

[0022] Figure 2 is a structural schematic diagram of a roller assembly;

[0023] Figure 3 It is a schematic diagram of the matching state of the workpiece and the roller assembly;

[0024] Description of the markings in the figure:

[0025] 1- chassis, 2- gear reduction motor, 3- motor bolt, 4- transmission shaft bolt, 5- tap, 6- support plate, 7- roller assembly, 8- slide plate, 9- vertical plate, 10- roller, 11- bearing shaft, 12- bearing, 13- nut, 14- flat washer, 15- electric control box, 16- fixing block, 17- infrared photoelectric switch, 18- workpiece. DETAILED DESCRIPTION

[0026] The following embodiments are implemented based on the above technical solution of the utility model, and provide detailed implementation methods and specific operation processes, but the protection scope of the utility model is not limited to the following embodiments.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] Example:

[0030] like Figure 1 The internal thread back-threading equipment shown in the figure has a base frame 1 welded by a plurality of square tubes; a support plate 6 is flatly welded on the base frame 1 to form a workbench; a gear reduction motor 2 is fixed to the support plate 6 by a motor bolt 3; a tap 5 is installed in the center hole of the transmission shaft of the gear reduction motor 2, and a transmission shaft bolt 4 is screwed in from the outer circle of the transmission shaft to fix the tap 5; a slide plate 8 and a vertical plate 9 (one on each side) are assembled and welded, and then welded to a steel plate 6; a roller assembly 7, see Figure 2 , which is composed of the following parts: bearing 12, roller 10, bearing shaft 11, flat washer 14, nut 13; two roller assemblies 7, one on the left and one on the right, are welded side by side on the slide plate 8, and the workpiece is placed between the two roller assemblies 7, see Figure 3 The workpiece is welded from four parts: two steel bars, the nut on the left and the clamp on the right. Figure 1 The fixed block 16 is welded on the support plate 6, and the infrared photoelectric switch 17 is fixed on the fixed block 16; the electric control box 15 is fixed on the chassis 1.

[0031] Working principle:

[0032] like Figure 1As shown, the reduction motor 2 is started to drive the tap 5 to rotate; the operator places the workpiece between the two roller assemblies 7, and pushes the workpiece toward the reduction motor 2 until it hits the tap 5; at this time, the tap 5 will be screwed into the nut to perform the tapping operation; when the nut moves to the infrared photoelectric switch 17, the photoelectric switch sends a signal to control the reduction motor 2 to stop rotating, and starts to reverse after a delay of 1 second. After 8 seconds, the motor stops, and the tap has exited the nut hole; finally, the operator takes out the workpiece that has been tapped.

[0033] This embodiment changes the manual thread return repair to an automatic thread return driven by a reduction motor, which not only reduces the labor intensity of workers, but also greatly improves production efficiency. According to calculations, after using this new internal thread return equipment, one shift can complete the repair of 400 products, which is 4 times the original output. After the improvement, the repair cost is reduced to 1 / 4 of the original. For mass-produced products, the amount of cost savings will be even more considerable.

[0034] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. An internal thread back threading device, characterized in that: It comprises a workbench, a motor arranged on the workbench, a tap (5) drivingly connected to the motor, a position sensor pointing to the tail of the working section of the tap (5), and a roller assembly (7) arranged in parallel on the workbench; A workpiece (18) having a nut to be processed is slidably disposed on a workbench and clamped between roller assemblies (7); The tap (5) interferes with the internal thread of the nut to be processed, so that the thread is returned and repaired during the rotation process, and the workpiece (18) is pulled inward; The position sensor is electrically connected to the motor and is used to detect the position of the workpiece.

2. The internal thread back-threading device according to claim 1, characterized in that: The motor is a gear reduction motor (2).

3. The internal thread back-threading device according to claim 2, characterized in that: The gear reduction motor (2) is fixed on the workbench by means of motor bolts (3).

4. The internal thread back-threading device according to claim 1, characterized in that: A center hole is opened on the end of the transmission shaft of the motor, and the tail end of the tap (5) is embedded in the center hole and fixed by a transmission shaft bolt (4) penetrating the side wall of the center hole.

5. The internal thread back-threading device according to claim 1, characterized in that: A plurality of transmission shaft bolts (4) are arranged on the transmission shaft of the motor.

6. The internal thread back-threading device according to claim 1, characterized in that: The workbench is provided with a workpiece slide, the workpiece (18) is slidably arranged on the workpiece slide, and the roller assembly (7) is vertically arranged on the workpiece slide.

7. The internal thread back-threading device according to claim 6, characterized in that: The workpiece slide comprises a slide plate (8) and a vertical plate (9) arranged between the front side of the slide plate (8) and the workbench, and between the rear side and the workbench.

8. The internal thread back-threading device according to claim 1, characterized in that: The roller assembly (7) comprises a bearing shaft (11) erected on a workbench, a bearing (12) sleeved on the bearing shaft (11) one above and one below, and a roller (10) sleeved outside the bearing (12).

9. The internal thread re-threading device according to claim 8, characterized in that: The roller assembly (7) further comprises a threaded column arranged at the top end of the bearing shaft (11), a nut (13) arranged on the threaded column, and a flat washer (14) arranged between the nut (13) and the top side of the roller (10).

10. The internal thread back-threading device according to claim 1, characterized in that: The workbench comprises a base frame (1) and a support plate (6) arranged on the base frame (1).

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