Broaching edge polishing device

Abstract

The utility model discloses a broach edge polishing device which comprises a supporting body, a cylindrical through cavity is formed in the supporting body, annular guide rails are arranged in the cavity in an up-down spaced mode, and a first annular sliding block and a second annular sliding block which are driven by a driving mechanism to rotate along the guide rails are installed on the upper guide rail and the lower guide rail respectively. Bristles are planted on the side face, facing the center of the cavity, of the first annular sliding block, copper wires are planted on the side face, facing the center of the cavity, of the second annular sliding block, and an air gun is fixedly arranged at the top end of the supporting body. According to the broach edge polishing device, grinding wheel dust and virtual edges of a broach are cleaned through the rotating bristles and the rotating copper wires, and the broach edge polishing device is convenient to use, labor-saving in operation and high in efficiency. When the device is adopted to carry out edge grinding finishing operation, the phenomenon of repeated edge grinding due to broaching quality problems caused by'virtual edges' (and grinding wheel ash) after the cutter is subjected to edge grinding is avoided, namely invalid edge grinding is avoided, and the service life of the cutter is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of broach sharpening, in particular to a broach sharpening and finishing device. Background Art

[0002] Auto parts are mostly characterized by internal spline holes, and broaches are used frequently. Due to the product structure, the broach models range from a maximum diameter of 180mm to a minimum diameter of 40mm, and the cost of broaches accounts for a large proportion of the production cost. In addition, broaches have complex structures, are difficult to make, have a long production cycle, and are generally sold at a high price. Therefore, it is necessary to take measures to increase the service life of broaches to reduce the production costs of enterprises.

[0003] Traditionally, it is often stipulated that the broach teeth need to be sharpened after processing a certain number of parts, so as to increase the service life of the broach and avoid excessive cutting force causing the broach to break or break. Traditionally, the broaches after sharpening are directly used to process parts without a good "post-grinding" treatment. The teeth are often damaged when the spline is pulled for the first time after sharpening due to "empty blades", that is, the broach has invalid sharpening. In this case, the teeth need to be sharpened again. Traditionally, a broach can be sharpened more than 10-20 times (depending on the size of the tool, generally about 12-15 times for a tool, and some large tools with thicker teeth can be sharpened more than 20 times), of which 3-5 times are invalid sharpening, which seriously affects the service life of the tool and greatly reduces the number of parts that can be processed. In addition, the grinding wheel dust particles remaining on the teeth will cause the parts to be scratched, affecting the quality of the parts, and will also participate in the broaching process and affect the tool life. Therefore, it is urgent to increase the effective sharpening times of the broach teeth. If the broach can be reasonably sharpened and used well, it will play a vital role in reducing costs. Utility Model Content

[0004] In order to avoid ineffective sharpening of broach teeth and increase the service life of the broach, the utility model provides a broach sharpening and finishing device.

[0005] The technical solution adopted by the utility model is a broach blade grinding and finishing device, including a support body, a cylindrical through cavity is provided in the support body, annular guide rails are provided at upper and lower intervals in the cavity, a first annular slider and a second annular slider driven by a driving mechanism to rotate along the guide rails are respectively installed on the upper and lower guide rails, the first annular slider is planted with bristles on the side facing the center of the cavity, and the second annular slider is planted with copper wire on the side facing the center of the cavity, and an air gun is fixedly provided on the top of the support body.

[0006] Further, the muzzle of the airgun faces away from the cavity.

[0007] Furthermore, the end faces of the first annular slider and the second annular slider are provided with bevel teeth, which are meshed with bevel gears. A fixed shaft coaxial with the bevel gear is installed on the side of the bevel gear away from the center of the cavity. The fixed shaft drives the bevel gear to rotate by connecting to a drive motor.

[0008] Furthermore, bevel teeth are provided on the upper end surface of the first annular slider and the lower end surface of the second annular slider.

[0009] Furthermore, it comprises a base frame, and the support body and the driving motor are both fixed on the base frame.

[0010] Furthermore, the guide rail is T-shaped, and the first annular slider and the second annular slider are provided with T-shaped grooves matching therewith.

[0011] The broach blade grinding and finishing device of the utility model cleans the grinding wheel dust and the virtual edge of the broach by rotating bristles and copper wires, and is easy to use, labor-saving and efficient. The blade grinding and finishing operation is implemented by the device, and the phenomenon of repeated sharpening due to the broaching quality problems caused by the "virtual edge" (and grinding wheel dust) after the tool is sharpened is avoided, that is, ineffective sharpening is avoided, and the service life of the tool is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model;

[0014] Figure 3 This is a schematic diagram of the virtual edge of the tool after sharpening.

[0015] In the figure: 100, virtual blade; 1, support body; 2, guide rail; 3, first annular slider; 4, second annular slider; 5, bristles; 6, copper wire; 7, air gun; 8, bevel teeth; 9, bevel gear; 10, fixed shaft; 11, drive motor; 12, base frame. DETAILED DESCRIPTION

[0016] In order to better understand the purpose, structure and function of the utility model, a broach grinding and finishing device of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0017] like Figure 1 and Figure 2 As shown, a broach grinding and finishing device comprises a support body 1, in which a cylindrical through cavity is provided, in which annular guide rails 2 are provided at upper and lower intervals, and a first annular slider 3 and a second annular slider 4 which can be driven to rotate along the guide rail 2 by a driving mechanism are respectively installed on the upper and lower guide rails 2, the first annular slider 3 is planted with bristles 5 on the side facing the center of the cavity, and the second annular slider 4 is planted with copper wire 6 on the side facing the center of the cavity, and an air gun 7 is fixedly provided on the top of the support body 1.

[0018] The broach edge polishing device of the utility model can be installed on a workbench alone or on a broaching machine for use, and has the functions of cleaning grinding wheel dust and trimming the virtual edge of the blade teeth.

[0019] In this embodiment, the guide rail 2 is T-shaped, and the first annular slider 3 and the second annular slider 4 are provided with T-shaped grooves that match therewith. In an optional embodiment, the guide rail 2 is V-shaped, and the first annular slider 3 and the second annular slider 4 are provided with V-shaped grooves that match therewith. The upper end surface of the first annular slider 3 and the lower end surface of the second annular slider 4 are provided with bevel teeth 8, and the bevel teeth 8 are meshed and connected with bevel gears 9. The bevel gear 9 is installed with a fixed shaft 10 coaxial with the bevel gear 9 on the side away from the center of the cavity, and the fixed shaft 10 is driven to rotate by connecting to the drive motor 11. The fixed shaft 10 is connected to the drive motor 11, and the rotational movement of the bristles 5 on the first annular slider 3 and the copper wire 6 on the second annular slider 4 is realized through the bevel gear 9. The support body 1 and the drive motor 11 are both fixed on the base frame 12. The air gun 7 is used to clean the grinding wheel dust and iron filings, and the muzzle faces away from the cavity. Multiple air guns 7 can be installed.

[0020] like Figure 3 As shown, after sharpening, the tool first has a virtual edge 100, and secondly, there is grinding wheel dust on the tooth surface of the tool. The virtual edge 100 will cause ineffective sharpening of the broach, and the grinding wheel dust has a serious impact on the broaching quality of the parts. To solve these two problems of the broach tool, the grinding wheel dust is first cleaned with a soft brush, and then the teeth of the broach are trimmed with a copper brush after sharpening. The virtual edge 100 of the tool tip after sharpening is polished to avoid the chipping of the broach teeth during the broaching process, which reduces the life of the broach, thereby increasing the number of effective sharpening times of the broach and avoiding ineffective sharpening.

[0021] Clean the grinding wheel dust adsorbed on the teeth after sharpening to prevent the grinding wheel dust from participating in the grinding process during the broaching process, causing abnormal wear of the teeth, affecting product quality and reducing the number of parts that can be processed after sharpening. Perform forced finishing on the broach after each sharpening to ensure that the number of parts processed after each sharpening remains unchanged. Therefore, increasing the number of effective sharpening times increases the overall number of parts processed by a broach, which means increasing the service life of the broach.

[0022] When in use, follow the following steps to start the drive motor 11. First brush: Use the rotating bristles 5 on the first annular slider 3 to clean the grinding wheel dust on the broach body, mainly to clean out the grinding wheel dust particles stuck between the teeth; Second blow: Use the air gun 7 to blow away the cleaned grinding wheel dust particles, and pay attention to cleaning them row by row in order to prevent teeth from leaking; Third spray oil: Prepare an oil pot to spray a little lubricating oil on the copper wire 6. This step is to provide lubrication for the next step to prevent the copper wire 6 from scratching the broach tooth surface; Fourth brush: Use the rotating copper wire 6 to make a circular motion along the back face of the broach. To improve efficiency, the height of the second annular slider 4 can be appropriately increased so that the copper wire 6 can brush 5 to 8 rows of teeth at the same time. This step is to grind off the virtual blade 100; Fifth blow: Use the air gun 7 to blow off the iron filings polished off in the previous step, and also pay attention to cleaning them row by row in order.

[0023] These five steps ensure the cleanliness of the broach after sharpening, avoid the damage of grinding wheel dust particles sticking to the front blade and causing damage to the blade teeth, and grind and trim the virtual edge 100 produced after sharpening, completely eliminating the ineffective sharpening of the broach, increasing the effective sharpening times of the broach, and thus increasing the service life of the broach.

[0024] By adopting the broach sharpening and finishing device of the utility model, the broach after sharpening is subjected to the above-mentioned "five-step" finishing operation method, and there is no invalid sharpening of the broach. In the past, a new broach (such as T355-J006) can generally be sharpened 11 times from purchase to scrapping, and some large broaches (such as T355-028) can reach 18 times due to thicker teeth. Before the tool adopts the finishing and grinding method, there are 3-5 invalid sharpenings (that is, after broaching 3-5 parts after sharpening, the teeth of the parts are damaged and need to be sharpened again). Since the implementation of the five-step finishing and grinding method after sharpening, the losses caused by invalid sharpening have been avoided. For example, the effective sharpening times of T355-J006 broach have been increased to 14 times. The additional effective sharpening times are calculated based on 700 more pieces processed each time, which means that about 2,100 more pieces can be processed. The total number of parts that can be processed has increased from about 7,700 to about 9,800, an increase of 27.3%. In summary, a broach of this type can save more than 100,000 yuan in tool costs per year according to normal production tasks compared with the past.

[0025] After the implementation of the grinding and finishing operation, the cleanliness of the tool after grinding has been guaranteed, and there have been no quality problems caused by grinding wheel dust particles (quality problems caused by parts being damaged by adsorption on the teeth of the cutter during broaching), and the problem of parts being damaged has decreased by 30%, especially the scrap rate of export products due to damage has decreased by 43%, which has improved the product qualification rate. The use of the broach grinding and finishing device to implement the finishing operation avoids the phenomenon of ineffective tool grinding, greatly improves the service life of the tool, and has achieved good results and economic benefits in practical applications. The application of this operation can be solidified in standard operations to ensure product quality and output.

[0026] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A broach edge polishing device, characterized in that: The invention comprises a support body (1), wherein a cylindrical through cavity is provided in the support body (1), an annular guide rail (2) is provided in the cavity at an interval of upper and lower portions, a first annular slider (3) and a second annular slider (4) are respectively mounted on the upper and lower guide rails (2) and are driven by a driving mechanism to rotate along the guide rail (2), the first annular slider (3) is planted with bristles (5) on the side facing the center of the cavity, and the second annular slider (4) is planted with copper wires (6) on the side facing the center of the cavity, and an air gun (7) is fixedly provided on the top of the support body (1).

2. The broach edge grinding and finishing device according to claim 1, characterized in that: The muzzle of the air gun (7) faces away from the cavity.

3. The broach edge grinding and finishing device according to claim 1, characterized in that: The end surfaces of the first annular slider (3) and the second annular slider (4) are provided with bevel teeth (8), the bevel teeth (8) are meshedly connected with a bevel gear (9), and a fixed shaft (10) coaxial with the bevel gear (9) is installed on the side of the bevel gear (9) away from the center of the cavity, and the fixed shaft (10) drives the bevel gear (9) to rotate by connecting to a drive motor (11).

4. The broach edge grinding and finishing device according to claim 3, characterized in that: Conical teeth (8) are provided on the upper end surface of the first annular slider (3) and the lower end surface of the second annular slider (4).

5. The broach edge grinding and finishing device according to any one of claims 3 or 4, characterized in that: It comprises a base frame (12), on which the support body (1) and the drive motor (11) are both fixed.

6. The broach edge grinding and finishing device according to claim 1, characterized in that: The guide rail (2) is T-shaped or V-shaped, and the first annular slider (3) and the second annular slider (4) are provided with T-shaped grooves or V-shaped grooves that match them.

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