A batch chamfering process for automobile parts and a special fixture

Abstract

The present invention discloses a batch chamfering process for automobile parts: 1) prepare a plurality of semi-finished automobile parts; 2) prepare a special fixture for batch chamfering of automobile parts; 3) pre-set the fixture base on the workbench of the processing equipment; place a plurality of semi-finished automobile parts one by one in the automobile part placement position on the fixture plate, so that the residual edge of the side of the semi-finished automobile parts is in the avoidance position, so that a tool path is formed between the avoidance positions in the same row; then place the fixture plate filled with semi-finished automobile parts in the placement groove of the fixture base, and lock and fix it; open the air valve device, so that negative pressure is formed in the placement groove of the fixture base, and then the semi-finished automobile parts are sucked tightly to the automobile part placement position of the fixture plate through the adsorption through hole; 4) start the processing equipment, and batch remove the residual edges and chamfer the plurality of semi-finished automobile parts placed on the fixture plate. The present invention also discloses a special fixture for implementing the above-mentioned batch chamfering process for automobile parts.

Description

Technical Field

[0001] The invention relates to a processing technology for automobile parts, and in particular to a batch chamfering processing technology for automobile parts and a special fixture. Background Art

[0002] At present, there are some auto parts that are small in size and have a square-like structure. In addition to the front, back, left and right sides, the upper and lower parts (i.e., the front and back sides) also have structures that need to be processed. For such auto parts, initially, the traditional processing technology used was to process them with bar stock, and only one auto part could be processed at a time. The process flow is roughly as follows: 1. Clamp the long bar stock, mill the end of the bar stock, and process the side and upper parts of the auto parts; 2. Cut the bar stock, and then clamp the parts in reverse to process the lower part of the auto parts; 3. Take out the parts again for clamping (leave out the parts that need to be chamfered), and chamfer the corresponding side positions of each auto part one by one. This process flow can only process one auto part at a time on the bar stock, and the processing process requires multiple clamping and flipping, which is extremely inefficient and has low material utilization.

[0003] Later, the inventor of this application designed a process for processing automobile parts, which uses sheet materials to process automobile parts in batches at one time, that is, after a sheet material is clamped (the clamp can be turned over to facilitate processing the front and back sides of the sheet material, that is, to facilitate processing the upper and lower parts of each automobile part), multiple automobile parts are directly processed on this sheet material at one time, and then the connected automobile parts processed on this sheet material are separated (broken or cut) to form individual automobile parts. The process flow is roughly as follows: incoming materials, sheet materials are used as raw materials; milling one, batch roughing the front side; milling two, batch finishing the front and back sides; chamfering, after MC milling two, the automobile parts are removed (separated), the residual edges connecting the automobile parts and the sheet material are removed and chamfered. However, because the automobile parts in the current process are in a single state, chamfering can only be done manually, and the removal of residual edges and chamfering of a single automobile part leads to unstable chamfering size and low efficiency; in short, this chamfering process of processing one by one has low production efficiency, unstable quality, and cannot meet the production delivery time. Therefore, there are still many unreasonable aspects in the current residual edge removal and chamfering processing technology of automobile parts, which need to be improved and perfected. Summary of the invention

[0004] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a batch chamfering processing technology and a special fixture for automobile parts, so that automobile parts can be batch-cleared of residual edges and chamfered during the machining process. Residual edges can be cleared and chamfered for multiple automobile parts on a plate at a time, and the machining accuracy can be guaranteed to meet the dimensional requirements of the automobile parts drawings, so as to meet the batch production requirements of automobile parts, reduce manual operations, improve product quality and effect, save manpower and equipment costs, improve production efficiency, and meet production delivery time.

[0005] The technical solution adopted by the present invention is: a batch chamfering process for automobile parts, characterized in that it includes the following steps:

[0006] 1) preparing a plurality of semi-finished automobile parts, wherein each semi-finished automobile part has a residual edge at a side originally connected to a sheet material, and the residual edge needs to be cleaned and chamfered;

[0007] 2) preparing a special fixture for batch chamfering of automobile parts, the special fixture for batch chamfering of automobile parts comprising a fixture base and a fixture plate, the fixture base being provided with a placement groove adapted to the fixture plate, the placement groove being connectable to the air valve device, the fixture plate being provided with a plurality of automobile parts placement positions (adapted to the shape of automobile parts) arranged vertically and horizontally, and a suction through hole being provided at the bottom of the automobile parts placement position; wherein, the fixture plate is provided with a space for avoiding an empty space at the side of the automobile parts placement position corresponding to the automobile parts semi-finished product requiring residual edge removal and chamfering;

[0008] 3) The fixture base is pre-set on the workbench of the processing equipment; a plurality of semi-finished automobile parts are placed one by one in the automobile part placement position on the fixture plate, so that the residual edge of the side of the semi-finished automobile parts is in the avoidance position (so that a tool path is formed between the avoidance positions in the same row); then the fixture plate filled with the semi-finished automobile parts is placed in the placement groove of the fixture base, and locked and fixed; the air valve device is opened to form a negative pressure in the placement groove of the fixture base, and then the semi-finished automobile parts are sucked tightly to the automobile part placement position of the fixture plate through the adsorption through hole;

[0009] 4) The processing equipment is started, and the processing tool is processed along the avoidance position (tool path), and residual edges of multiple semi-finished automotive parts placed on the fixture plate are removed and chamfered in batches.

[0010] Further, in step 1), the semi-finished automobile parts are obtained by the following method: preparing raw material sheets of automobile parts, clamping the sheets and processing the sheets, processing a plurality of semi-finished automobile parts on the sheets, wherein at least one side of the front, rear, left and right sides of each semi-finished automobile part is left connected to the sheet; after removing the semi-finished automobile parts from the sheet one by one, a plurality of individual semi-finished automobile parts are obtained; wherein the individual semi-finished automobile parts have residual edges on the sides originally connected to the sheet, and the residual edges need to be removed and chamfered.

[0011] Furthermore, in step 1), the automobile part is in a square structure, with a boss portion in the middle position of the front, rear, left and right sides, two columnar protrusion structures and a plurality of irregular concave-convex structures on the front side, and a plurality of columnar recesses and a plurality of irregular concave-convex structures on the back side; when a plurality of automobile part semi-finished products are processed on the sheet material, the front and rear sides or the left and right sides of each automobile part semi-finished product are connected to the sheet material; after the automobile part semi-finished products are removed from the sheet material one by one, the front and rear sides or the left and right sides of the individual automobile part semi-finished products have residual edges.

[0012] Furthermore, in step 1), processing a plurality of semi-finished automobile parts on the sheet material specifically includes the following steps: MC milling one, batch roughing the front side; MC milling two, batch finishing the front and back sides.

[0013] A special fixture for batch chamfering of automobile parts for implementing the process is characterized in that it includes a fixture base and a fixture plate, the fixture base is provided with a placement groove compatible with the fixture plate, the placement groove can be connected to the air valve device, the fixture plate is arranged vertically and horizontally to arrange multiple automobile part placement positions, and the bottom of the automobile part placement position is provided with adsorption through holes; wherein, the fixture plate is provided with an avoidance space on the side of the automobile part placement position corresponding to the automobile part semi-finished product that needs to remove the residual edge and chamfer.

[0014] Furthermore, the adsorption through holes arranged at the bottom of the automobile part placement position include a plurality of adsorption through holes which are irregularly distributed at the automobile part placement position.

[0015] Furthermore, the fixture plate is provided with a positioning block between two adjacent automobile parts placement positions, and the side surface of the positioning block forms a positioning surface.

[0016] Furthermore, the fixture plate is provided with avoidance grooves at four corners corresponding to each automobile part placement position.

[0017] Furthermore, the fixture base is provided with sealing ring assembly grooves on the four sides of the placement groove corresponding to the bottom of the fixture plate.

[0018] Furthermore, the fixture base is provided with an air source connection hole at the bottom of the placement groove which can be connected to the air valve device.

[0019] The present invention has the following advantages: by designing a special fixture, the fixture base and the fixture plate cooperate to arrange and fix multiple semi-finished automobile parts at one time, and reserve space for removing residual edges and chamfering, so that automobile parts can be cleaned of residual edges and chamfered in batches during machining, and multiple automobile parts on a plate can be cleaned of residual edges and chamfered at one time, and the machining accuracy is guaranteed to meet the size requirements of the automobile parts drawing, so as to meet the batch production requirements of automobile parts, reduce manual operations, improve product quality and effect, save manpower and equipment costs, and improve production efficiency to meet production delivery time.

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the process flow of batch chamfering processing of automobile parts;

[0022] Figure 2 The schematic diagram of the structure after processing multiple semi-finished automotive parts from sheet metal;

[0023] Figure 3 for Figure 2 A schematic diagram of a local enlarged structure;

[0024] Figure 4 It is a schematic diagram of the structure of a single semi-finished automobile part taken out from a sheet;

[0025] Figure 5 This is a schematic diagram of the structure of an automobile part after the residual edges have been removed and the chamfers have been completed;

[0026] Figure 6 is a structural schematic diagram of the fixture plate;

[0027] Figure 7 for Figure 6 A schematic diagram of a local enlarged structure;

[0028] Figure 8 This is a schematic diagram of the structure of the fixture plate after placing the semi-finished automobile parts;

[0029] Fig. 9 for Figure 8 A schematic diagram of a local enlarged structure;

[0030] Fig.10 It is a structural schematic diagram of the fixture base;

[0031] Fig.11 It is a schematic diagram of the matching structure of the fixture plate and the fixture base;

[0032] In the figure: sheet a; semi-finished automobile part 1; residual edge 11; fixture base 2; placement groove 21; sealing ring assembly groove 22; fixture plate 3; automobile part placement position 31; adsorption through hole 32; avoidance position 33; positioning block 34; avoidance groove 35. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the present invention, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] See also Figures 1 to 11 The batch chamfering process for automobile parts provided in this embodiment includes the following steps:

[0037] 1) Prepare a plurality of semi-finished automobile parts 1, wherein the semi-finished automobile parts 1 are prepared in the following manner: prepare a raw material sheet a of automobile parts, clamp the sheet a and process the sheet a (generally by milling on a CNC device), and process a plurality of semi-finished automobile parts 1 on the sheet a, wherein at least one side of the front, rear, left, and right sides of each semi-finished automobile part 1 is left connected to the sheet; after removing the semi-finished automobile parts 1 from the sheet a one by one, a plurality of individual semi-finished automobile parts 1 are obtained; wherein, the individual semi-finished automobile parts 1 have residual edges 11 on the side originally connected to the sheet, and the residual edges 11 need to be removed and chamfered. That is, when removing the automobile parts, the edges connecting the automobile parts and the sheet are broken one by one, and a part of the connection structure, that is, the residual edges, will remain at the broken parts. Because there are still residual edges, it is a semi-finished automobile part, and it is a finished automobile part only after the residual edges are removed and chamfered.

[0038] 2) preparing a special fixture for batch chamfering of automobile parts, the special fixture for batch chamfering of automobile parts comprising a fixture base 2 and a fixture plate 3, the fixture base 2 is provided with a placement groove 21 adapted to the fixture plate 3, the placement groove 21 can be connected to the air valve device (actually connected to the air source, so as to perform adsorption control), the fixture plate 3 is provided with a plurality of automobile part placement positions 31 arranged vertically and horizontally (adapted to the shape of automobile parts), and the bottom of the automobile part placement position 31 is provided with an adsorption through hole 32; wherein, the fixture plate 3 is provided with a spare position 33 at the side of the automobile part placement position 31 corresponding to the automobile part semi-finished product 1 that needs to remove the residual edge 11 and chamfer;

[0039] 3) The fixture base 2 is pre-set on the workbench of the processing equipment (the processing equipment generally adopts CNC); a plurality of semi-finished automobile parts 1 are placed one by one in the automobile part placement position 31 on the fixture plate 3, and the residual edge 11 of the side of the semi-finished automobile parts 1 is placed in the avoidance position 33, so that a tool path is formed between the avoidance positions 33 in the same row (arranged regularly, a knife can be run from the beginning to the end, and both sides of the tool path are processed, saving time, improving efficiency, and also improving processing quality); then the fixture plate 3 filled with semi-finished automobile parts 1 is placed in the placement groove 21 of the fixture base 2, and locked and fixed; the air valve device is opened to form a negative pressure in the placement groove 21 of the fixture base 2 (that is, the placement groove of the fixture base is evacuated and sucked), and then the semi-finished automobile parts 1 are sucked tightly to the automobile part placement position 31 of the fixture plate 3 through the adsorption through hole 32;

[0040] 4) The processing equipment is started, and the processing tool is processed along the avoidance position 33 (tool path), and the residual edges 11 of multiple semi-finished automobile parts 1 placed on the fixture plate 3 are removed and chamfered in batches. After the residual edges are removed and chamfered, the air valve device is adjusted to release the adsorption of the automobile parts, the fixture plate is taken out, and the next fixture plate is replaced for the next round of processing.

[0041] Specifically, in step 1), the automobile part is a square structure, with a boss portion in the middle of the front, back, left and right sides, two columnar protrusions and a number of irregular concave-convex structures on the front side, and a number of columnar recesses and a number of irregular concave-convex structures on the back side; when a plurality of semi-finished automobile parts are processed on the sheet material, the front and back sides or the left and right sides of each semi-finished automobile part are connected to the sheet material; after the semi-finished automobile parts are removed from the sheet material one by one, the front and back sides or the left and right sides of a single semi-finished automobile part 1 have a residual edge 11 (the residual edge is located at the upper edge of the left and right sides or the front and back boss portions). With respect to the structure of the automobile part of this embodiment, in step 1), processing a plurality of semi-finished automobile parts on the sheet material specifically includes the following steps: MC milling one, batch roughing of the front side; MC milling two, batch finishing of the front and back sides.

[0042] It should be noted here that the structural types of automobile parts (or other parts) applicable to this process are not limited to the above-mentioned structures. As long as they are small in size, square in shape, can be adsorbed, and have residual edges on the sides that need to be removed and chamfered, they are applicable. For some parts with similar structures, the processing procedures on the sheet may be different. As long as the semi-finished parts are finally obtained, and the individual semi-finished automobile parts have residual edges on the sides that were originally connected to the sheet, and the residual edges need to be removed and chamfered, then this process can be used to remove the residual edges and chamfer in batches.

[0043] In this embodiment, the number of automobile parts per plate is 40. When the parts are chamfered, special fixtures / jigs are equipped, and the program is compiled by professional technicians. The processing operations are performed by specially trained personnel. The 40 products are evenly distributed on the fixture, and the chamfering of 40 parts can be completed in one process through the milling machine.

[0044] Experiments show that this chamfering process design can directly complete 40 at a time through a milling machine. It is easy to clamp and realize batch production of chamfering. It meets the size requirements of the part drawings, effectively improves processing efficiency, and meets production delivery time.

[0045] See also Figures 6 to 11A special fixture for batch chamfering of automobile parts for implementing the process comprises a fixture base 2 and a fixture plate 3. The fixture base 2 is provided with a placement groove 21 adapted to the fixture plate, and the placement groove 21 can be connected to the air valve device. The fixture plate 3 is vertically and horizontally arranged with a plurality of automobile part placement positions 31, and the bottom of the automobile part placement position 31 is provided with an adsorption through hole 32; wherein, the fixture plate 3 is provided with a reserve space 33 at the side of the automobile part placement position 31 corresponding to the automobile part semi-finished product 1 that needs to remove the residual edge 11 and chamfer.

[0046] Specifically, the bottom of the automobile part placement position 31 is provided with a plurality of adsorption holes 32, which are irregularly distributed in the automobile part placement position 31. The adsorption holes 32 are mainly used to adsorb and fix the parts placed in the automobile part placement position. Because automobile parts are small and have certain irregularities in structure, the air adsorption fixation form is adopted to tighten or loosen at the same time, which is convenient and quick, and is not easy to damage the parts.

[0047] Specifically, the fixture plate 3 is provided with a positioning block 34 between two adjacent automobile part placement positions, and the side of the positioning block 34 forms a positioning surface. The positioning block 34 is provided to facilitate positioning and limiting the front, back, left, and right parts of the automobile part when the automobile part is placed on the automobile part placement position of the fixture plate. It should also be noted that the height of the positioning block 34 should be lower than the height of the part, otherwise it is easy to block the residual edge of the semi-finished automobile part.

[0048] Specifically, the jig plate 3 is provided with avoidance grooves 35 at four corners corresponding to each automobile part placement position. The avoidance grooves are designed to facilitate tool movement when machining the automobile part placement positions, avoidance positions, positioning blocks and other structures on the jig plate, that is, these avoidance grooves are left when machining the structures on the jig plate and become part of the overall structure of the jig plate.

[0049] Specifically, the fixture base 2 is provided with sealing ring assembly grooves 22 around the placement groove 21 corresponding to the bottom of the fixture plate 3. When the fixture plate 3 is placed in the placement groove 21 of the fixture base 2, it is necessary to lock and seal it, so as to facilitate the subsequent gas adsorption and fixing of the parts on the fixture plate.

[0050] Specifically, the fixture base 2 is provided with an air source connection hole at the bottom of the placement groove 21 which can be connected to the air valve device.

[0051] The present invention is not limited to the above-mentioned implementation mode. Other batch chamfering processes and special fixtures for automobile parts obtained by adopting the same or similar technical features as the above-mentioned embodiments of the present invention are within the protection scope of the present invention.

Claims

1. A batch chamfering process for automobile parts, characterized in that: The steps include: Preparing a plurality of semi-finished automobile parts, wherein each semi-finished automobile part has a residual edge at a side originally connected to the sheet material, and the residual edge needs to be cleaned and chamfered; A special fixture for batch chamfering of automobile parts is prepared, the special fixture for batch chamfering of automobile parts comprises a fixture base and a fixture plate, the fixture base is provided with a placement groove adapted to the fixture plate, the placement groove can be connected to the air valve device, the fixture plate is provided with a plurality of automobile parts placement positions arranged vertically and horizontally, and the bottom of the automobile parts placement position is provided with an adsorption through hole; wherein, the fixture plate is provided with a space for avoiding an empty space on the side of the automobile parts placement position corresponding to the automobile parts semi-finished product that needs to be cleaned of residual edges and chamfered; The fixture base is pre-arranged on the workbench of the processing equipment; a plurality of semi-finished automobile parts are placed one by one in the automobile part placement position on the fixture plate, so that the residual edge of the side of the semi-finished automobile parts is in the avoidance position; then the fixture plate filled with the semi-finished automobile parts is placed in the placement groove of the fixture base, and locked and fixed; the air valve device is opened to form a negative pressure in the placement groove of the fixture base, and then the semi-finished automobile parts are sucked tightly to the automobile part placement position of the fixture plate through the adsorption through hole; Start the processing equipment, and the processing tool performs processing along the avoidance position, and removes the residual edges and chamfers the multiple semi-finished automobile parts placed on the fixture plate in batches; In step 1), the semi-finished automobile parts are prepared by the following method: preparing a raw material sheet of automobile parts, clamping the sheet and processing the sheet, processing a plurality of semi-finished automobile parts on the sheet, wherein at least one side of the front, rear, left, and right sides of each semi-finished automobile part is left connected to the sheet; after removing the semi-finished automobile parts from the sheet one by one, a plurality of individual semi-finished automobile parts are obtained; wherein the individual semi-finished automobile parts have residual edges on the sides originally connected to the sheet, and the residual edges need to be removed and chamfered; In step 1), the automobile part is in a square structure, with a boss portion in the middle of the front, rear, left and right sides, two columnar protrusion structures and a plurality of irregular concave-convex structures on the front side, and a plurality of columnar recesses and a plurality of irregular concave-convex structures on the back side; when a plurality of semi-finished automobile parts are processed on a sheet material, the front and rear sides or the left and right sides of each semi-finished automobile part are connected to the sheet material; after the semi-finished automobile parts are removed from the sheet material one by one, the front and rear sides or the left and right sides of a single semi-finished automobile part have residual edges.

2. The process for batch chamfering of automobile parts according to claim 1, characterized in that: In step 1), processing a plurality of semi-finished automobile parts on the sheet material specifically includes the following steps: MC milling one, batch roughing the front side; MC milling two, batch finishing the front and back sides.

3. A special fixture for batch chamfering of automobile parts for implementing the process described in any one of claims 1 to 2, characterized in that: The utility model comprises a fixture base and a fixture plate, wherein the fixture base is provided with a placement groove matched with the fixture plate, the placement groove can be connected with the air valve device, the fixture plate is provided with a plurality of automobile parts placement positions arranged vertically and horizontally, and the bottom of the automobile parts placement positions is provided with adsorption through holes; wherein, the fixture plate is provided with a space for avoiding at the side of the automobile parts placement position corresponding to the automobile parts semi-finished product which needs to remove the residual edge and chamfer.

4. The special fixture for batch chamfering of automobile parts according to claim 3 is characterized in that: The bottom of the automobile part placement position is provided with a plurality of adsorption through holes which are irregularly distributed in the automobile part placement position.

5. The special fixture for batch chamfering of automobile parts according to claim 3, characterized in that: The fixture plate is provided with a positioning block between two adjacent automobile parts placement positions, and the side surface of the positioning block forms a positioning surface.

6. The special fixture for batch chamfering of automobile parts according to claim 3, characterized in that: The fixture plate is provided with avoidance grooves at four corners corresponding to each automobile part placement position.

7. The special fixture for batch chamfering of automobile parts according to claim 3, characterized in that: The fixture base is provided with sealing ring assembly grooves on the four sides in the placement groove corresponding to the bottom of the fixture plate.

8. The special fixture for batch chamfering of automobile parts according to claim 3, characterized in that: The clamp base is provided with an air source connection hole which can be connected with the air valve device at the bottom of the placement groove.

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